Búsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »
Iniciar sesión
Usuarios de lectores de pantalla: deben hacer clic en este enlace para utilizar el modo de accesibilidad. Este modo tiene las mismas funciones esenciales pero funciona mejor con el lector.

Patentes

  1. Búsqueda avanzada de patentes
Número de publicaciónUS20030181910 A1
Tipo de publicaciónSolicitud
Número de solicitudUS 10/338,953
Fecha de publicación25 Sep 2003
Fecha de presentación8 Ene 2003
Fecha de prioridad23 Oct 1998
También publicado comoCA2414900A1, CA2414900C, DE60113269D1, DE60113269T2, DE60113269T3, EP1301135A1, EP1301135B1, EP1301135B2, US6585735, WO2002007627A1
Número de publicación10338953, 338953, US 2003/0181910 A1, US 2003/181910 A1, US 20030181910 A1, US 20030181910A1, US 2003181910 A1, US 2003181910A1, US-A1-20030181910, US-A1-2003181910, US2003/0181910A1, US2003/181910A1, US20030181910 A1, US20030181910A1, US2003181910 A1, US2003181910A1
InventoresSean Dycus, Steven Buysse, Randel Frazier, Dax Brown
Cesionario originalDycus Sean T., Buysse Steven Paul, Frazier Randel Alven, Brown Dax D.
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Bipolar electrosurgical forceps with non-conductive stop members
US 20030181910 A1
Resumen
A bipolar forceps for clamping and sealing tissue includes at least one elongated shaft having opposing jaw members at a distal end thereof which are movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween. The forceps is also connected to a source of electrical energy which, in turn, connects to each jaw member to the source of electrosurgical energy such that the jaw members are capable of conducting energy through tissue held therebetween. At least two non-conductive and spaced-apart stop members are disposed on an inner facing surface of the jaw members to control the gap distance between the jaw member(s) when tissue is held therebetween.
Imágenes(13)
Previous page
Next page
Reclamaciones(15)
What is claimed is:
1. A bipolar forceps, comprising:
at least one elongated shaft having opposing jaw members at a distal end thereof, the jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;
a source of electrical energy connected to each jaw member such that the jaw members are capable of conducting energy through tissue held therebetween; and
at least two non-conductive and spaced-apart stop members disposed on an inner facing surface of at least one of the jaw members which control the distance between the jaw members when tissue is held therebetween.
2. A bipolar forceps according to claim 1 wherein the stop members are manufactured from the group consisting of: parylene, nylon and ceramic.
3. A bipolar forceps according to claim 1 wherein the stop members include a series of longitudinally-oriented projections which extend from a proximal end of the jaw member to a distal end of the jaw member.
4. A bipolar forceps according to claim 1 wherein the stop members include a series of circle-like tabs which extend from a proximal end of the jaw member to a distal end of the jaw member.
5. A bipolar forceps according to claim 4 wherein the circle-like tabs are disposed in an alternating, laterally-offset manner relative to one another along a length of the jaw member.
6. A bipolar forceps according to claim 4 wherein each of the circle-like tabs is centrally disposed along a width of the jaw member.
7. A bipolar forceps according to claim 1 wherein the stop members protrude about 0.001 inches to about 0.005 inches from the inner facing surface of the jaw member.
8. A bipolar forceps according to claim 1 wherein the stop members protrude about 0.002 inches to about 0.003 inches from the inner facing surface of the jaw member.
9. A bipolar forceps according to claim 1 wherein the stop members are affixed to the jaw member by stamping.
10. A bipolar forceps according to claim 1 wherein the stop members are affixed to the jaw member by thermal spraying.
11. A bipolar forceps according to claim 1 wherein the stop members are affixed to the jaw member by an adhesive.
12. A bipolar forceps according to claim 1 wherein the stop members are affixed to the jaw member by a molding process.
13. A bipolar forceps according to claim 1 wherein the forceps includes a drive rod assembly which connects the jaw members to the source of electrical energy such that the first jaw member has a first electrical potential and the second jaw member has a second electrical potential; and
a handle attached to the drive rod assembly for imparting movement of the first and second jaw members from the first and second positions.
14. A bipolar forceps, comprising:
at least one elongated shaft having opposing jaw members at a distal end thereof, the jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;
a source of electrical energy connected to each jaw member such that the jaw members are capable of conducting energy through tissue held therebetween; and
a stop member disposed along a periphery of an inner facing surface of at least one jaw member for controlling the distance between the jaw members when tissue is held therebetween.
15. A bipolar forceps, comprising:
at least one elongated shaft having opposing jaw members at a distal end thereof, the jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;
a source of electrical energy connected to each jaw member such that the jaw members are capable of conducting energy through tissue held therebetween; and
a stop member which includes a longitudinally oriented ridge which extends from a proximal end to a distal end of an inner facing surface of at least one jaw member for controlling the distance between the jaw members.
Descripción
    CROSS REFERENCE TO RELATED APPLICATION
  • [0001]
    This application is a continuation of U.S. application Ser. No. 09/621,029 filed on Jul. 21, 2000 which is a continuation of U.S. application Ser. No. 09/177,950 filed on Oct. 23, 1998 the contents of which are hereby incorporated by reference in their entirety.
  • BACKGROUND
  • [0002]
    The present disclosure relates to an electrosurgical instrument for performing open and/or endoscopic surgical procedures. More particularly, the present disclosure relates to a bipolar electrosurgical forceps which includes a non-conductive stop member associated with one or both of the opposing jaw members which is designed to control the gap distance between opposing jaw members and enhance the manipulation and gripping of tissue during the sealing process.
  • TECHNICAL FIELD
  • [0003]
    A hemostat or forceps is a simple plier-like tool which uses mechanical action between its jaws to constrict vessels and is commonly used in open surgical procedures to grasp, dissect and/or clamp tissue. Electrosurgical forceps utilize both mechanical clamping action and electrical energy to effect hemostasis by heating the tissue and blood vessels to coagulate, cauterize and/or seal tissue.
  • [0004]
    Over the last several decades, more and more surgeons are complimenting traditional open methods of gaining access to vital organs and body cavities with endoscopes and endoscopic instruments which access organs through small puncture-like incisions. Endoscopic instruments are inserted into the patient through a cannula, or port, that has been made with a trocar. Typical sizes for cannulas range from three millimeters to twelve millimeters. Smaller cannulas are usually preferred, and this presents a design challenge to instrument manufacturers who must find ways to make surgical instruments that fit through the cannulas.
  • [0005]
    Certain surgical procedures require cutting blood vessels or vascular tissue. However, due to space limitations surgeons can have difficulty suturing vessels or performing other traditional methods of controlling bleeding, e.g., clamping and/or tying-off transected blood vessels. Blood vessels, in the range below two millimeters in diameter, can often be closed using standard electrosurgical techniques. If a larger vessel is severed, it may be necessary for the surgeon to convert the endoscopic procedure into an open-surgical procedure and thereby abandon the benefits of laparoscopy.
  • [0006]
    Several journal articles have disclosed methods for sealing small blood vessels using electrosurgery. An article entitled Studies on Coagulation and the Development of an Automatic Computerized Bipolar Coagulator, J. Neurosurg., Volume 75, July 1991, describes a bipolar coagulator which is used to seal small blood vessels. The article states that it is not possible to safely coagulate arteries with a diameter larger than 2 to 2.5 mm. A second article is entitled Automatically Controlled Bipolar Electrocoagulation-“COA-COMP”, Neurosurg. Rev. (1984), pp.187-190, describes a method for terminating electrosurgical power to the vessel so that charring of the vessel walls can be avoided.
  • [0007]
    By utilizing an electrosurgical forceps, a surgeon can either cauterize, coagulate/desiccate and/or simply reduce or slow bleeding, by controlling the intensity, frequency and duration of the electrosurgical energy applied to the tissue. Generally, the electrical configuration of electrosurgical forceps can be categorized in two classifications: 1) monopolar electrosurgical forceps; and 2) bipolar electrosurgical forceps.
  • [0008]
    Monopolar forceps utilize one active electrode associated with the clamping and effector and a remote patient return electrode or pad which is typically attached externally to the patient. When the electrosurgical energy is applied, the energy travels from the active electrode, to the surgical site, through the patient and to the return electrode.
  • [0009]
    Bipolar electrosurgical forceps utilize two generally opposing electrodes which are disposed on the inner opposing surfaces of the end effectors and which are both electrically coupled to an electrosurgical generator. Each electrode is charged to a different electric potential. Since tissue is a conductor of electrical energy, when the effectors are utilized to grasp tissue therebetween, the electical energy can be selectively transferred through the tissue.
  • [0010]
    In order to effect a proper seal with larger vessels, two predominant mechanical parameters must be accurately controlled—the pressure applied to the vessel and the gap between the electrodes both of which affect thickness of the sealed vessel. More particularly, accurate application of the pressure is important to oppose the walls of the vessel, to reduce the tissue impedance to a low enough value that allows enough electrosurgical energy through the tissue, to overcome the forces of expansion during tissue heating and to contribute to the end tissue thickness which is an indication of a good seal. It has been determined that a fused vessel wall is optimum between 0.001 and 0.005 inches. Below this range, the seal may shred or tear and above this range the lumens may not be properly or effectively sealed.
  • [0011]
    Electrosurgical methods may be able to seal larger vessels using an appropriate electrosurgical power curve, coupled with an instrument capable of applying a large closure force to the vessel walls. It is thought that the process of coagulating small vessels is fundamentally different than electrosurgical vessel sealing. For the purposes herein, “coagulation” is defined as a process of desiccating tissue wherein the tissue cells are ruptured and dried and vessel sealing is defined as the process of liquefying the collagen in the tissue so that it reforms into a fused mass. Thus, coagulation of small vessels is sufficient to permanently close them. Larger vessels need to be sealed to assure permanent closure.
  • [0012]
    Numerous bipolar electrosurgical forceps have been proposed in the past for various open surgical procedures. However, some of these designs may not provide uniformly reproducible pressure to the blood vessel and may result in an ineffective or non-uniform seal. For example, U.S. Pat. No. 2,176,479 to Willis, U.S. Pat. Nos. 4,005,714 and 4,031,898 to Hiltebrandt, U.S. Pat. Nos. 5,827,274, 5,290,287 and 5,312,433 to Boebel et al., U.S. Pat. Nos. 4,370,980, 4,552,143, 5,026,370 and 5,116,332 to Lottick, U.S. Pat. No. 5,443,463 to Stern et al., U.S. Pat. No. 5,484,436 to Eggers et al. and U.S. Pat. No. 5,951,549 to Richardson et al., all relate to electrosurgical instruments for coagulating, cutting and/or sealing vessels or tissue.
  • [0013]
    These instruments rely on clamping pressure alone to procure proper sealing thickness and are not designed to take into account gap tolerances and/or parallelism and flatness requirements which are parameters which, if properly controlled, can assure a consistent and effective tissue seal. For example, it is known that it is difficult to adequately control thickness of the resulting sealed tissue by controlling clamping pressure alone for either of two reasons: 1) if too much force is applied, there is a possibility that the two poles will touch and energy will not be transferred through the tissue resulting in an ineffective seal; or 2) if too low a force is applied, a thicker less reliable seal is created.
  • [0014]
    As mentioned above, in order to properly and effectively seal larger vessels, a greater closure force between opposing jaw members is required. It is known that a large closure force between the jaws typically requires a large moment about the pivot for each jaw. This presents a challenge because the jaw members are typically affixed with pins which are positioned to have a small moment arms with respect to the pivot of each jaw member. A large force, coupled with a small moment arm, is undesirable because the large forces may shear the pins. Moreover and with particular respect to endoscopic procedures, it may also be undesirable to increase the moment arm of the pins because the physical size of the jaw members and other component parts might not fit through a cannula.
  • [0015]
    Moreover, increasing the closure forces between electrodes may have other undesirable effects, e.g., it may cause the opposing electrodes to come into close contact with one another which may result in a short circuit and a small closure force may cause pre-mature movement of the issue during compression and prior to activation.
  • [0016]
    Thus, a need exists to develop a bipolar forceps which effectively seals vascular tissue and solves the aforementioned problems by providing an instrument which produces a large closure force between the opposing jaws members, reduces the chances of short circuiting the opposing jaws during activation and assists in manipulating, gripping and holding the tissue prior to and during activation.
  • SUMMARY
  • [0017]
    The present disclosure relates to a bipolar forceps for clamping and sealing tissue for use in open or endoscopic surgical procedures. The forceps includes at least one elongated shaft having opposing jaw members at a distal end thereof. The jaw members are movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween. The forceps connect to a source of electrical energy which, in turn, connects to each jaw member such that the jaw members are capable of conducting energy through tissue held therebetween. At least two nonconductive and spaced-apart stop members are disposed on an inner-facing surface of the jaw members to control the gap distance between the jaw members when tissue is held therebetween.
  • [0018]
    In one embodiment, the stop members include a series of longitudinally-oriented projections which extend along the inner-facing surface from the proximal end to the distal end of the jaw member. In another embodiment, the stop members include a series of circle-like tabs which project from the inner facing surface and extend from the proximal end to the distal end of the jaw member. Each of the stop members may be centrally disposed along the width of the jaw member, or, alternatively, the stop members may be disposed in an alternating, laterally-offset manner relative to one another along the length of the surface of the jaw member.
  • [0019]
    In another embodiment of the present disclosure, a raised lip acts as a stop member which projects from the inner-facing surface and extends about the outer periphery of the jaw member to control the gap distance between jaw members. In another embodiment, a longitudinally-oriented ridge extends from the proximal end to the distal end of one of the jaw members and controls the gap distance between the jaw members.
  • [0020]
    The stop members are affixed/attached to the jaw member(s) by stamping, thermal spraying, overmolding and/or by an adhesive. Preferably, the stop members project about 0.001 inches to about 0.005 inches and, preferably, about 0.002 inches to about 0.003 inches from the inner-facing surface of at least one of the jaw members. It is envisioned that the stop members may be made from an insulative material such as parylene, nylon and/or ceramic.
  • [0021]
    Another embodiment of the present disclosure includes a bipolar forceps having a drive rod assembly which electrically connects the jaw members to the source of electrical energy such that the first jaw member has a first electrical potential and the second jaw member has a second electrical potential. A handle is attached to the drive rod assembly for imparting movement of the first and second jaw members relative to one another from the first and second positions. At least two spaced-apart stop members are disposed on the inner-facing surface of the jaw member(s) for regulating the overall gap distance between the jaw members at closing.
  • [0022]
    Another embodiment of the present disclosure relates to a bipolar forceps which includes a pair of elongated shafts each having a jaw member at a distal end thereof and a finger ring at a proximal end thereof. Movement of the finger rings imparts movement of the jaw members relative to one another from the first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween. The first shaft connects to the source of electrical energy to supply the first jaw member to a first electrical potential and the second shaft connects the second jaw member to a second electrical potential such that the jaw members are capable of conducting energy through the tissue held therebetween. At least two spaced-apart stop members are disposed on the inner facing surface of the jaw member(s) for controlling the gap distance between the jaw members.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0023]
    Various embodiments of the subject instrument are described herein with reference to the drawings wherein:
  • [0024]
    [0024]FIG. 1 is a perspective view of an endoscopic forceps according to the present disclosure;
  • [0025]
    [0025]FIG. 2 is an enlarged, perspective view of an end effector assembly of the forceps of FIG. 1;
  • [0026]
    [0026]FIG. 3 is a perspective view with parts separated of a handle assembly and activator of the forceps of FIG. 1;
  • [0027]
    [0027]FIG. 4 is an enlarged, perspective view with parts separated of the end effector assembly and a drive rod assembly of the forceps of FIG. 1;
  • [0028]
    [0028]FIG. 5A is a side, partial cross-section of the handle assembly and drive rod assembly of the forceps of FIG. 1;
  • [0029]
    [0029]FIG. 5B is an enlarged, side cross-section of the indicated area of detail shown in FIG. 5A;
  • [0030]
    [0030]FIG. 6 is a perspective view of the handle assembly, activator and drive rod assembly of the forceps of FIG. 1;
  • [0031]
    [0031]FIG. 7 is an enlarged, partial cross-section of the end effector assembly shown with a pair of jaw members in the open configuration;
  • [0032]
    [0032]FIG. 8 is an enlarged, partial cross-section showing the linear motion of the drive rod assembly against a cam follower of the end effector assembly to effect closure of the jaw members;
  • [0033]
    [0033]FIG. 9 is a perspective view of the forceps showing the rotational movement of a rotating assembly which rotates the end effector assembly about a longitudinal axis “A”;
  • [0034]
    [0034]FIG. 10 is an enlarged perspective view of the indicated area of detail shown in FIG. 9;
  • [0035]
    [0035]FIG. 11 is a perspective view of the forceps of the present disclosure shown sealing a tubular vessel through a cannula assembly;
  • [0036]
    [0036]FIG. 12 is an enlarged perspective view of a sealing site of a tubular vessel;
  • [0037]
    [0037]FIG. 13 is a longitudinal cross-section of the sealing site taken along line 13-13 of FIG. 12;
  • [0038]
    [0038]FIG. 14 is a longitudinal cross-section of the sealing site of FIG. 12 after separation of the tubular vessel;
  • [0039]
    [0039]FIG. 15A is a perspective view of an open forceps according to the present disclosure;
  • [0040]
    [0040]FIG. 15B is an enlarged view of the forceps of FIG. 15A; and
  • [0041]
    FIGS. 16A-16G are enlarged, perspective views showing alternative embodiments of a non-conductive stop member disposed on or along the inner-facing surface of one of the jaw members.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • [0042]
    Referring now to FIGS. 1-3, one embodiment of bipolar forceps 10 is shown for use with endoscopic surgical procedures and includes a drive rod assembly 11 which is coupled to a handle assembly 18. The drive rod assembly 11 includes an elongated hollow shaft portion 12 having a proximal end 16 and a distal end 14. In the drawings and in the descriptions which follow, the term “proximal”, as is traditional, will refer to the end of the bipolar forceps 10 which is closer to the user, while the term “distal” will refer to the end which is further from the user. In addition, although the majority of the figures, i.e., FIGS. 1-14, show one embodiment of the presently described instrument for use with endoscopic surgical procedures, e.g., forceps 10, it is envisioned that the same inventive concepts as shown and described herein may also be employed with or incorporated on an open surgical instrument 100 such as the embodiment shown by way of example in FIGS. 15A and 15B.
  • [0043]
    An end effector assembly 22 is attached to the distal end 14 of shaft 12 and includes a pair of opposing jaw members 80 and 82. Preferably, handle assembly 18 is attached to the proximal end 16 of shaft 12 and includes an activator 20 which imparts movement of the jaw members 80 and 82 from an open position wherein the jaw members 80 and 82 are disposed in spaced relation relative to one another, to a clamping or closed position wherein the jaw members 80 and 82 cooperate to grasp tissue 150 (FIG. 12) therebetween.
  • [0044]
    As best seen in FIG. 3, activator 20 includes a movable handle 26 having an aperture 34 defined therethrough for receiving at least one of the operator's fingers and a fixed handle 28 having an aperture 32 defined therethrough for receiving an operator's thumb. Movable handle 26 is selectively moveable from a first position relative to fixed handle 28 to a second position in closer proximity to the fixed handle 28 to close jaw members 80 and 82. Preferably, fixed handle 28 includes a channel 27 which extends proximally for receiving a ratchet 30 which is coupled to movable handle 26. Ratchet 30 allows a user to selectively, progressively and incrementally move jaw members 80 and 82 relative to one another from the open to closed positions. As can be appreciated, ratchet 30 also allows a user to lockingly engage the movable handle 26 and, therefore, jaw members 80, 82 at incremental positions relative to one another prior to and/or during activation. In some cases it may be preferable to include other mechanisms to control and/or limit the movement of handle 26 relative to handle 28 and jaw members 80 and 82 such as, e.g., hydraulic, semi-hydraulic and/or gearing systems.
  • [0045]
    Fixed handle 28 includes a rotating assembly 23 for controlling the rotational movement of end effector assembly 22 about a longitudinal axis “A” of the elongated shaft 12 (see FIGS. 9 and 10). Preferably, rotating assembly 23 includes upper and lower knob portions 24 a and 24 b, respectively, which mechanically interface one another to enclose a gear 52 which is attached to shaft 12. Preferably, the ratio of rotation of rotating assembly 23 to end effector assembly 22 is 1:1, however, it is contemplated that a different gearing structure may be incorporated to increase or decrease the rotational ratio depending upon a particular purpose, e.g., worm gears, gear trains, etc.
  • [0046]
    Preferably, a pair of handle sections 28 a and 28 b engage one another by way of a plurality of mechanical interfaces to form fixed handle 28. The mechanical interfaces include sockets 138 which are formed in handle section 28 b and which are dimensioned to receive a complimentary plurality of detents (not shown) attached to handle section 28 a. While the term socket is used herein, it is contemplated that either a male or female mechanical interface may be used on either handle section e.g., 28 a with a mating mechanical interface disposed on the opposite handle section, e.g., 28 b.
  • [0047]
    As best seen in FIG. 3, each handle section 28 a and 28 b is generally hollow such that a cavity 50 is formed therein for housing the various internal-working components which make up the forceps 10. For example, cavity 50 houses a PC board 58 which transfers electrosurgical energy transmitted from an electrosurgical generator (not shown) to each jaw member 80 and 82. A plug 62 connects to the electrosurgical generator and transmits electrosurgical energy to the PC board via a cable 60 which is fed to forceps 10 through a wire port 29 disposed in the proximal end of handle assembly 28.
  • [0048]
    Preferably, a lost motion mechanism is positioned between each of the handle sections 28 a and 28 b for maintaining a predetermined or maximum clamping force for sealing tissue between the jaw members 80 and 82. In the particular embodiment shown in FIG. 3, the lost motion mechanism comprises a resilient arm 40 which is connected between handle sections 28 a and 28 b by pin 42. More particularly, the arm 40 includes a lower end 46, an upper end 45 and shaft portion 47 located therebetween. Preferably, upper end 45 is bifurcated and forms a clevis having upwardly extending flanges 49 a and 49 b, respectively. Lower end 46 is dimensioned to engage a step-like interface 48 located on movable handle portion 26. The shaft portion 47 is seated within a pivot slot 55 located towards the upper end of handle 26 such that the shaft portion 47 is housed within an elongated channel 56 formed within movable handle portion 26. Preferably, a cover plate 31 attaches to movable handle 26 by conventional means, e.g., snap-fit engagement to secure arm 40 within handle 26.
  • [0049]
    Referring to FIG. 4, rod assembly 11 includes a drive rod 70 which has a proximal end 71 and a distal end 72. A ball contact 38 is attached to the proximal end 71 of drive rod 70 and includes a generally rounded head portion 39 and a notch 41 located between the head portion 39 and the proximal end of ball contact 38. Preferably, clevis flanges 49 a and 49 b of arm 40 are dimensioned to receive head 39 therebetween when arm 40 is assembled between handle sections 28 a and 28 b (see FIG. 6). Movement of the handle 26 towards fixed handle 28 imparts pivotal movement of the upper end 45 of arm 40 at pivot slot 55 (see FIG. 5A) which, in turn, imparts movement of the ball contact 38 from a first position wherein the ball contact 38 is disposed further from end effector assembly 22 to a second position wherein ball contact 38 is in closer proximity to end effector assembly 22 (see FIG. 5B). As explained in greater detail below, movement of the ball contact 38 between first and second positions imparts linear movement to drive rod 70 which, in turn, moves jaw members 80 and 82 toward and away from each other.
  • [0050]
    As can be appreciated by the present disclosure, seating the generally rounded head 39 between clevis flanges 49 a and 49 b enables the user to utilize the rotating assembly 23 effectively without interfering with the linear movement of the ball contact 38.
  • [0051]
    As best seen in the exploded view of FIG. 4, the end effector assembly 22 includes first jaw 80, second jaw 82 and an electrically insulating yoke 84 disposed therebetween. Preferably, jaw member 80 and jaw member 82 are movable from the open position to the closed position by movement of the handle assembly 18 as described above. It is also contemplated that either one or both of the jaw members 80 and 82 can be movable relative to one another in the same or similar manner as described above. First jaw member 80 includes a first flange 81 which extends therefrom and a cam slot 86 located therethrough. Likewise, second jaw 82 includes a second flange 83 which extends therefrom and a cam slot 88 located therethrough. Preferably, each jaw 80 and 82 is formed from a stainless steel or some other electrically conductive material.
  • [0052]
    The end effector assembly 22 also includes an outer nose portion 94 and an inner nose portion 96 which engage jaw members 82 and 80, respectively. A first pivot 105 is located on outer nose portion 94 and is dimensioned to engage a corresponding pivot hole 89 located on flange 83. A second pivot 103 is located on inner nose portion 96 and is dimensioned to engage a corresponding pivot hole 87 located on flange 81. The center of rotation for first jaw member 80 is about a first pivot hole 87 and the center of rotation for second jaw member 82 is about a second pivot hole 89. Preferably, each nose portion 94 and 96 is made from an electrically conductive material and transmits electrosurgical energy to a respective jaw member 82 and 80 as described in more detail below.
  • [0053]
    As mentioned above with respect to FIG. 3, electrosurgical energy is transmitted from the electrosurgical generator to the PC board 58 which transfers the energy into first and second poles. A pair of terminal clips 64 a and 64 b are connected to PC board 58 and transfer the first and second poles of alternating potential, respectively, to the different portions of the drive rod assembly 11, i.e., clip 64 a connects to shaft 12 and conducts the first pole to jaw member 82 and clip 64 b connects to ball contact 38 which connects the second pole to jaw member 80. Since both the drive rod 70 and the shaft 12 are made from an electrically conductive material, an insulation sleeve 75 is disposed between drive rod 70 and shaft 12 to prevent the forceps 10 from short circuiting.
  • [0054]
    As best seen in FIG. 4, the inner nose portion 96 is electrically connected with drive rod 70 and the outer nose portion 94 is electrically connected to shaft 12. The inner and outer nose portions 96 and 94 capture yoke 84 along with flanges 83 and 81. Yoke 84 moves axially along axis “A” (see FIGS. 7 and 8) in a space between inner and outer portions 96 and 94 and a spacer stake 119 maintains the separation of the nose portions 96 and 94 at their distal ends. Stake 119 is dimensioned to engage and lock the inner and outer nose portions 96 and 94 together, which, in turn locks jaw member 80 and 82 atop yoke 84. In some cases it may be preferable to dimension stake 119 such that stake 119 acts as a stop member and/or an additional stop member which controls the gap distance between the opposing jaw members 80 and 82 relative to one another. In this case, stake 119 is formed from an electrically insulative material such as plastic. The nose portions 94 and 96 provide lateral support for the flanges 81 and 83 and help ensure that detents 90 and 92 remain within cam slots 86 and 88, respectively.
  • [0055]
    End effector assembly 22 also includes an inner insulator 102 and an outer insulator 100 for maintaining electrical isolation between the first and second poles. Outer insulator 100 insulates outer nose portion 94 from inner nose portion 96 and drive rod 70 which conduct the second pole of electrical energy. Inner insulator 102 insulates inner nose portion 96 from outer nose portion 94 and shaft 12 which conduct the first pole of electrical energy. In this manner, outer nose portion 94 can provide electrical continuity between shaft 12 and jaw member 82, while inner nose portion 96 can provide electrical continuity between drive rod 70 and jaw member 80.
  • [0056]
    Preferably, a spring contact 98 is utilized to maintain the electrical connection between drive rod 70 and inner nose portion 96 during axial motion of the drive rod 70. A donut-shaped spacer 108 can also be utilized as a seal. Sleeve 75 also acts as an insulation between drive rod 70 and shaft 12 and is envisioned to prevent accidental short circuiting of the forceps 10 during movement of the drive rod 70.
  • [0057]
    As mentioned above and as best seen in FIG. 4, drive rod assembly 11 also includes gear 52 which attaches to shaft 12 and is designed to facilitate rotational movement of the end effector assembly 22 about axis “A”. More particularly, gear 52 includes an upper portion 52 a and a lower portion 52 b which each have a pair of outwardly extending mechanical interfaces 54 a and 54 b, respectively, which are dimensioned to releasably engage a corresponding pair of mechanical interfaces 35 disposed on shaft 12. Preferably, gear 52 is made from an electrically insulative material such as, e.g., plastic, to avoid transferring electrosurgical energy to the rotating assembly 23. As best seen in FIG. 5A, rotating assembly 23 includes two half sections 24 a and 24 b which each include a flange 77 a and 77 b, respectively, which extends outwardly therefrom for engaging gear 52. Rotation of assembly 23 effects rotational movement of the shaft 12 which, in turn, rotates the end effector assembly 22 about axis “A” (see FIGS. 9 and 10).
  • [0058]
    Referring back to FIG. 4, yoke 84 is preferably formed from an electrically insulative material such as plastic. A first side 91 of yoke 84 faces first flange 81 and a second side 93 of yoke 84 faces second flange 83. When yoke 84 is positioned between flanges 81 and 83, yoke 84 electrically insulates and isolates the first jaw member 80 from second jaw member 82. In this manner, bipolar electrosurgical current can be conducted through tissue 150 which is grasped between jaws 80 and 82 without flanges 81 and 83 short circuiting.
  • [0059]
    Yoke 84 also includes first detent 90 located on the first side 91 which is dimensioned to movably engage cam slot 86 and a second detent 92 located on the second side 93 which is dimensioned to engage cam slot 88. Preferably, the detent and cam slot combination, 90, 86 and 92, 88, respectively, work together as a cam-follower mechanical linkage. Linear motion of drive rod 70 along axis “A” moves the yoke 84 causing detents 90 and 92 to slide within their respective cam slots 86 and 88. In one embodiment, slots 86 and 88 are angled with respect to the distal ends of the jaws 80 and 82 such that the jaws 80 and 82 move in a generally arcuate fashion toward and away from each other.
  • [0060]
    In another embodiment, the inner periphery of the cam slots 86 and 88 are shaped to include two angles which, in turn, cause the jaw members 80 and 82 to move in two separate and distinct fashions relative to one another upon full extension of the drive rod 70. For example, cam slots 86 and 88 can include a first or proximal stage which effects generally arcuate movement of the jaw members 80 and 82 relative to one another and a second or distal stage wherein the jaw members 80 and 82 move in a more linear fashion relative to one another. It is envisioned that the cam slots 86 and 88 can be dimensioned to effect other movements of the jaw members 80 and 82 relative to one another depending upon a particular purpose, e.g., parabolic movement, cycloidal movement, and/or sinusoidal movement.
  • [0061]
    As seen best with respect to FIGS. 7 and 8, detents 90 and 92 provide a force against the corresponding inner periphery of cam slots 86 and 88 creating a moment about pivots 103 and 105, respectively. Preferably, cam slots 86 and 88 are arranged such that distal motion of the drive rod 70 causes the jaw members 80 and 82 to move together. Once the jaw members 80 and 82 are closed together, it is envisioned that jaws 80 and 82 are held in clamped positioned by a continued compressive force on the rod 70 due to handle member 26. As mentioned above, the handle assembly 18 can include a lost motion mechanism for maintaining a predetermined or maximum clamping force for sealing tissue 150 between the jaw members 80 and 82
  • [0062]
    One of the advantages of the present disclosure is that excessive clamping forces which are normally associated with detents 90 and 92 are offloaded by the unique configuration of yoke 84 which prevents mechanical failure of the forceps 10. More particularly, the cam slots 86 and 88 are preferably dimensioned such that the cam-follower motion of the detents 90 and 92 within cam slots 86 and 88 simply operate to clamp the tissue 150 between the jaw members 80 and 82 and a small moment arm is created between the detents 90 and 92 and pivots 103 and 105, respectively. Before the detents 90 and 92 reach their distal most positions within the cam slots 86 and 88, respectively, a pair of shoulders 111 and 113 located on the yoke 84 are dimensioned to engage flanges 81 and 83 and offload any additional clamping force applied by the handle assembly 18.
  • [0063]
    In some cases it may be preferable to dimension cam slots 86 and 88 to have an enlarged distal end or cul-de-sac 78 a and 78 b, respectively, such that the cam-follower motion of detents 90 and 92 at their distal most point within slots 86 and 88 will come to rest within the cul-de-sac 78 a and 78 b allowing the closure force to be offloaded by shoulders 111 and 113 abutting flanges 81 and 83. It is envisioned that the cul-de-sacs 78 a and 78 b which are positioned within cam slots 86 and 88 will relieve shear stress on the detents 90 and 92 approximately at the same time when the shoulder portions 111 and 113 of the yoke 84 engage the flanges 81 and 83 to provide a closure force between the jaw members 80 and 82.
  • [0064]
    The shoulders 111 and 113 abut the proximal end of flanges 81 and 83 to cause jaw members 80 and 82 to close together with greater closure force. In other words, shoulder portions 111 and 113 provide a relatively large moment about pivots 103 and 105 to effect a high closure force between the jaw members 80 and 82. The unique configuration of the cam-follower linkage together with the shoulders 111 and 113 offloading high clamping forces prevent detents 90 and 92 from breaking due to mechanical failure. Since the pivots 103 and 105 are preferably made of metal and can withstand relatively high shear forces, the yoke 84 and its component parts can be formed from an insulating material such as plastic without risk of mechanical failure due to the high clamping forces necessary to seal tissue. As mentioned above, forming the yoke 84 from insulative materials will also prevent the jaw members 80 and 82 from shorting.
  • [0065]
    A mentioned above, two mechanical factors play an important role in determining the resulting thickness of the sealed tissue and effectiveness of the seal, i.e., the pressure applied between opposing jaw members 80 and 82 and the gap between the opposing jaw members 80 and 82 during the sealing process. However, thickness of the resulting tissue seal cannot be adequately controlled by force alone. In other words, too much force and the two jaw members 80 and 82 would touch and possibly short resulting in little energy traveling through the tissue thus resulting in a bad seal. Too little force and the seal would be too thick.
  • [0066]
    Applying the correct force is also important for other reasons: to oppose the walls of the vessel; to reduce the tissue impedance to a low enough value that allows enough current through the tissue; and to overcome the forces of expansion during tissue heating in addition to contributing towards creating the required end tissue thickness which is an indication of a good seal.
  • [0067]
    Preferably, the seal surfaces or tissue contacting surfaces 151, 251 (See FIGS. 15B and 16A-16G) of the jaw members 80 and 82 are relatively flat to avoid current concentrations at sharp edges and to avoid arcing between high points. In addition and due to the reaction force of the tissue 150 when engaged, jaw members 80 and 82 are preferably manufactured to resist bending. For example and as best seen in FIGS. 2 and 16A-16G, the jaw members 80 and 82 are preferably tapered along width “W” which is advantageous for two reasons: 1) the taper will apply constant pressure for a constant tissue thickness at parallel; 2) the thicker proximal portion of the jaw members 80 and 82 will resist bending due to the reaction force of the tissue 150.
  • [0068]
    As best seen in FIG. 4, in order to achieve a desired gap range (e.g., about 0.001 to about 0.005 inches and preferably about 0.002 inches to about 0.003 inches) and apply a desired force to seal the tissue, at least one jaw member 80 and/or 82 includes a stop member 139 which limits the movement of the two opposing jaw members 80 and 82 relative to one another. Preferably, stop member 139 extends from the sealing surface or tissue contacting surface 151 a predetermined distance according to the specific material properties (e.g., compressive strength, thermal expansion, etc.) to yield a consistent and accurate gap distance during sealing.
  • [0069]
    As explained above, in some cases it may be preferable to dimension stake 119 such that it acts like a stop member and/or an additional stop member and also controls/limits the movement of the two opposing jaw members 80 and 82 relative to one another. Preferably, stop member 139 and/or stake 119 is made from an insulative material, e.g., parylene, nylon and/or ceramic and is dimensioned to limit opposing movement of the jaw members 80 and 82 to within the above gap range.
  • [0070]
    [0070]FIG. 11 shows the endoscopic bipolar forceps 10 according to the present disclosure during use wherein movement of the handle assembly applies clamping force on the tubular tissue 150 to effect a seal 152 as shown in FIGS. 12 and 13. More particularly, shaft 12 and end effector assembly 22 are inserted through a trocar 130 and cannula 132 and handle 26 is moved progressively towards fixed handle 28 to cause jaw members 80 and 82 to grasp tubular vessel 150 therebetween. After the jaw members 80 and 82 are closed about the tissue 150, the user then applies electrosurgical energy to the tissue 150. By controlling the intensity, frequency and duration of the electrosurgical energy applied to the tissue 150, the user can either cauterize, coagulate/desiccate, seal and/or simply reduce or slow bleeding. As shown in FIGS. 13 and 14, once the tubular vessel is sealed, the vessel 150 can be cut along seal 152 to separate the tissue 150 and form gap 154 therebetween.
  • [0071]
    [0071]FIGS. 15A and 15B shows an open vessel bipolar surgical forceps 200 according to the present of disclosure. As can be appreciated, forceps 200 also includes an end effector assembly 222 which is attached to respective distal ends 214 a and 214 b of opposing elongated shafts 212 a and 212 b. End effector assembly 222 includes jaw members 280 and 282 disposed at distal ends 214 a, 214 b, respectively, which reside in opposing relation relative to one another and pivot about pivot 219. Preferably, a finger ring 232 a and 232 b is attached to a corresponding proximal end 216 a, 216 b of each shaft 212 a, 212 b, respectively, such that movement of the finger rings 232 a, 232 b imparts movement of the jaw members 280, 282 relative to one another from an open position (wherein the jaw members 280 and 282 are disposed in spaced relation relative to one another) to a clamping or closed position (wherein jaw members 280 and 282 cooperate to grasp tissue 150 (FIG. 12) therebetween).
  • [0072]
    [0072]FIG. 15B shows an enlarged view of one contemplated configuration of the jaw members 280 and 282 having a stop member 239 which is designed as a raised lip which extends along a the peripheral edge of jaw member 282 from a proximal end 243 to a distal end 245 of the jaw member 282. It is envisioned that forceps 200 can also include any of the envisioned stop member 239 configurations described below with respect to FIGS. 16A-16G.
  • [0073]
    FIGS. 16A-16G show various contemplated configurations of the non-conductive stop member 139 disposed on, along or protruding through the bottom jaw member 82 (282). It is envisioned that one or more stop members 139 can be positioned on either or both jaw members 80, 82 (280, 282) depending upon a particular purpose or to achieve a desired result. As can be appreciated by the present disclosure, the various configurations of the stop member 139 are designed to both limit the movement of the tissue 150 prior to and during activation and prevent short circuiting of the jaw members 80, 82 (280, 282) as the tissue 150 is being compressed.
  • [0074]
    [0074]FIG. 16A shows stop member 139 configured as a longitudinal ridge extending from a proximal end 143 to a distal end 145 of jaw member 82. FIG. 16B shows a series of stop members configured as longitudinally-oriented detents extending from the proximal end 143 to the distal end 145 of jaw member 82. FIG. 16C shows a series of circle-like stop members 139 extending from the proximal end 143 to the distal end 145 of jaw member 82 in an alternating, laterally-offset manner relative to one another. It is envisioned that circle-like stop members 139 are positioned proximate the right and left side edges 147, 149, respectively, of jaw member 82 and are substantially equal in size. However, it is envisioned that one or more of the stop members 139 may be dimensioned or shaped differently than the other stop members depending upon a particular purpose or to achieve a desired result.
  • [0075]
    [0075]FIG. 16D also shows a series of circle-like stop members 139 extending from the proximal end 143 to the distal end 145 of the jaw member 82, however, each of the stop members 139 is centrally disposed along width “W” of the jaw member 82. FIG. 16E shows another configuration wherein the stop member 139 is designed as a raised lip which projects from the outer periphery of the jaw member 82.
  • [0076]
    [0076]FIG. 16F shows yet another configuration which includes a stop member 139 b which is L-shaped and extends from the side edge 147, 149 of the jaw member 82 in a catamaran-like fashion. Preferably a complimentary stop member 139 a is disposed on the jaw member 80 such that the two stop members 139 a and 139 b abut one another when the jaws are moved towards the closed position. It is envisioned that configuring the jaw members in this fashion will provide lateral consistency and stabilization across width “W” (See FIG. 16D) of the overall gap distance (between about 0.001 inches to about 0.005 inches and preferably between about 0.002 and about 0.003 inches) between the sealing surfaces 151 of opposing jaw members 80, 82 (280, 282). FIG. 16G shows yet another embodiment wherein the stop members 139 a and 139 b are generally C-shaped.
  • [0077]
    Preferably, the non-conductive stop member(s) 139 (239) is molded onto the jaw members 80 and 82 (e.g., overmolding, injection molding, etc.), stamped onto the jaw members 80 and 82 or deposited (e.g., deposition) onto the jaw members 80 and 82. For example, one technique involves thermally spraying a ceramic material onto the surface of the jaw member 80 and 82 to form the stop member(s) 139. Several thermal spraying techniques are contemplated which involve depositing a broad range of heat resistant and insulative materials on the electrically conductive surfaces to create stop members 139, e.g., High velocity Oxy-fuel deposition, plasma deposition, etc. Other techniques for disposing the stop member(s) 139 on the electrically conductive surfaces are also contemplated, e.g., slide-on, snap-on, adhesives, molds, etc.
  • [0078]
    It is envisioned that the stop member 139 (239) protrudes about 0.001 to about 0.005 inches from the inner-facing surface of jaw member 82 (282) which, as can be appreciated by the present disclosure, both reduces the possibility of short circuiting between electrodes and enhances the gripping characteristics of the jaw members 80, 82 (280, 282). Preferably, the stop member 139, 239 protrudes about 0.002 inches to about 0.003 inches which has been determined to yield an ideal gap distance for producing effective, uniform and consistent tissue seals.
  • [0079]
    Alternatively, the stop member 139 (239) can be molded onto the Inner-facing surface of one or both jaw members 80, 82 (280, 282), or, in some cases, it may be preferable to adhere the stop member 139 (239) to the inner facing surface of one or both of the jaw members 80, 82 by any known method of adhesion. Stamping is defined herein to encompass virtually any press operation known in the trade, including but not limited to: blanking, shearing, hot or cold forming, drawing, bending, and coining.
  • [0080]
    FIGS. 16A-16G show some of the possible configurations of the stop member 139, however, these configurations are shown by way of example and should not be construed as limiting. Other configurations are also contemplated. For example, one or more of the configurations of FIGS. 16A-16G may be combined to form a different stop member 139 (239) configuration on the inner-facing surface of one or both of the jaw members 80, 82 (280, 282). Although FIGS. 16C and 16D depict circle-like stop members 139 (239) arranged in different configurations on or along jaw member 82 (282), it is contemplated that other shapes may be equally effective in reducing the possibility of short circuiting between electrodes and enhancing tissue grip.
  • [0081]
    Further, although it is preferable that the stop member 139 (239) protrude about 0.001 inches to about 0.005 and preferably about 0.002 inches to about 0.003 inches from the inner-facing surface of the jaw member(s), in some cases it may be preferable to have the stop member 139 (239) protrude more or less depending upon a particular purpose. For example, it is contemplated that the type of material used for the stop member 139 and that material's ability to absorb the large compressive closure forces between jaw members while reducing the possibility of short circuiting between jaw members will vary and, therefore, the overall dimensions of the stop member 139 may vary as well to produce the desired gap distance. In other words, the compressive strength of the material along with the desired or ultimate gap distance required (desirable) for effective sealing are parameters which are carefully considered when forming the stop members 139 (239).
  • [0082]
    As can be appreciated, one material may have to be dimensioned differently from another material to achieve the same gap distance or desired result. For example, the compressive strength of nylon is different from ceramic and, therefore, the nylon material may have to be dimensioned differently, e.g., thicker, to counteract the closing force of the opposing jaw members and to achieve the same desired gap distance.
  • [0083]
    From the foregoing and with reference to the various figure drawings, those skilled in the art will appreciate that certain modifications can also be made to the present disclosure without departing from the scope of the present disclosure. For example, it may be preferable to add other features to the forceps 10 (200), e.g., an articulating assembly to axially displace the end effector assembly 22 (222) relative to the elongated shaft 12 (212).
  • [0084]
    Moreover, it is envisioned that the presently enclosed stop member configurations may also be incorporated onto a disposable and/or partially disposable electrosurgical instrument such as those described in commonly-assigned, pending U.S. application Ser. No. 09/425,696 filed on Oct. 22, 1999 entitled “OPEN VESSEL SEALING FORCEPS WITH DISPOSABLE ELECTRODES” by Tetzlaff et al., U.S. application Ser. No. 09/178,027 filed on Oct. 23, 1998 entitled “OPEN VESSEL SEALING FORCEPS WITH DISPOSABLE ELECTRODES” by Tetzlaff et al. and U.S. application Ser. No. 09/387,883 filed on Sep. 1, 1999 entitled “BIPOLAR ELECTROSURGICAL INSTRUMENT WITH REPLACEABLE ELECTRODES” by Schmaltz et al., the contents of all of which are hereby incorporated by reference in their entirety herein. More particularly, it is contemplated that the presently disclosed forceps may include a disposable electrode assembly which is selectively engageable with at least one portion of the electrosurgical instrument, e.g., end effectors, shaft(s) and/or handle(s).
  • [0085]
    While several embodiments of the disclosure have been shown in the drawings, it is not intended that the disclosure be limited thereto, as it is intended that the disclosure be as broad in scope as the art will allow and that the specification be read likewise. Therefore, the above description should not be construed as limiting, but merely as exemplications of a preferred embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.
Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US371664 *18 Oct 1887 stone
US702472 *8 Ago 189817 Jun 1902Louis M PignoletSurgical forceps.
US728883 *29 Jul 190226 May 1903Andrew J DownesElectrothermic instrument.
US1586645 *6 Jul 19251 Jun 1926William BiermanMethod of and means for treating animal tissue to coagulate the same
US2002594 *24 Mar 193328 May 1935Wappler Frederick CharlesInstrument for electro-surgical treatment of tissue
US2011169 *13 Abr 193213 Ago 1935Wappler Frederick CharlesForcipated surgical electrode
US2031682 *18 Nov 193225 Feb 1936Wappler Frederick CharlesMethod and means for electrosurgical severance of adhesions
US2176479 *20 Mar 193717 Oct 1939Willis David AApparatus for finding and removing metal particles from human and animal bodies
US2305156 *17 Abr 194115 Dic 1942Weck & Co EdwardBox lock pivot and method of assembling same
US2632661 *14 Ago 194824 Mar 1953Cristjo CristofvJoint for surgical instruments
US2668538 *30 Ene 19529 Feb 1954George P Pilling & Son CompanySurgical clamping means
US2796065 *12 May 195518 Jun 1957Kapp Karl ASurgical clamping means
US3459187 *9 Mar 19675 Ago 1969Weck & Co Inc EdwardSurgical instrument and method of manufacture
US3643663 *15 Oct 196922 Feb 1972F L FischerCoagulating instrument
US3651811 *10 Oct 196928 Mar 1972Aesculap Werke AgSurgical cutting instrument
US3862630 *10 Dic 197328 Ene 1975Ultrasonic SystemsUltrasonic surgical methods
US3866610 *11 Ene 197118 Feb 1975Kletschka Harold DCardiovascular clamps
US3911766 *15 May 197414 Oct 1975Pilling CoBox lock surgical instrument and method of its manufacture
US3920021 *15 May 197418 Nov 1975Siegfried HiltebrandtCoagulating devices
US3921641 *14 Dic 197325 Nov 1975Research CorpControlling forceps
US3938527 *13 Jul 197317 Feb 1976Centre De Recherche Industrielle De QuebecInstrument for laparoscopic tubal cauterization
US3952749 *7 May 197527 Abr 1976Pilling Co.Box lock surgical instrument
US4005714 *30 Jul 19751 Feb 1977Richard Wolf GmbhBipolar coagulation forceps
US4074718 *17 Mar 197621 Feb 1978Valleylab, Inc.Electrosurgical instrument
US4088134 *5 Ago 19769 May 1978Joseph A. CapriniForceps
US4165746 *30 Jun 197728 Ago 1979Burgin Kermit HPlastic forceps
US4300564 *1 Nov 197917 Nov 1981Olympus Optical Co., Ltd.Forceps for extracting stones in the pelvis of a kidney
US4370980 *11 Mar 19811 Feb 1983Lottick Edward AElectrocautery hemostat
US4452246 *21 Sep 19815 Jun 1984Bader Robert FSurgical instrument
US4492231 *17 Sep 19828 Ene 1985Auth David CNon-sticking electrocautery system and forceps
US4552143 *22 Nov 198212 Nov 1985Lottick Edward ARemovable switch electrocautery instruments
US4574804 *27 Feb 198411 Mar 1986Board Of Regents, The University Of Texas SystemOptic nerve clamp
US4597379 *30 Mar 19831 Jul 1986Cabot Medical CorporationMethod of coagulating muscle tissue
US4600007 *13 Ago 198415 Jul 1986Fritz Gegauf AG Bernina-Nahmaschinenfab.Parametrium cutting forceps
US4657016 *16 Abr 198514 Abr 1987Garito Jon CElectrosurgical handpiece for blades, needles and forceps
US4662372 *12 Ago 19855 May 1987Acme United CorporationDisposable surgical instrument and method of forming
US4671274 *30 Ene 19849 Jun 1987Kharkovsky Nauchno-Issledovatelsky Institut Obschei IBipolar electrosurgical instrument
US4685459 *6 Mar 198611 Ago 1987Fischer Met GmbhDevice for bipolar high-frequency coagulation of biological tissue
US4985030 *18 Abr 199015 Ene 1991Richard Wolf GmbhBipolar coagulation instrument
US5147357 *18 Mar 199115 Sep 1992Rose Anthony TMedical instrument
US5336221 *6 Nov 19929 Ago 1994Premier Laser Systems, Inc.Method and apparatus for applying thermal energy to tissue using a clamp
US5443463 *16 Ago 199322 Ago 1995Vesta Medical, Inc.Coagulating forceps
US5536251 *3 Abr 199516 Jul 1996Heartport, Inc.Thoracoscopic devices and methods for arresting the heart
US5569243 *2 Ago 199429 Oct 1996Symbiosis CorporationDouble acting endoscopic scissors with bipolar cautery capability
US5573424 *9 Feb 199512 Nov 1996Everest Medical CorporationApparatus for interfacing a bipolar electrosurgical instrument to a monopolar generator
US5582611 *14 Nov 199410 Dic 1996Olympus Optical Co., Ltd.Surgical device for stapling and/or fastening body tissues
US5626609 *16 Dic 19946 May 1997United States Surgical CorporationEndoscopic surgical instrument
US5662667 *19 Sep 19952 Sep 1997Ethicon Endo-Surgery, Inc.Surgical clamping mechanism
US5716366 *22 Ago 199610 Feb 1998Ethicon Endo-Surgery, Inc.Hemostatic surgical cutting or stapling instrument
US5735848 *20 Abr 19957 Abr 1998Ethicon, Inc.Electrosurgical stapling device
US5766130 *12 Dic 199616 Jun 1998Selmonosky; Carlos A.Vascular testing method
US5779701 *27 Abr 199514 Jul 1998Symbiosis CorporationBipolar endoscopic surgical scissor blades and instrument incorporating the same
US5797938 *18 Nov 199625 Ago 1998Ethicon Endo-Surgery, Inc.Self protecting knife for curved jaw surgical instruments
US5797958 *4 Dic 199625 Ago 1998Yoon; InbaeEndoscopic grasping instrument with scissors
US5810811 *4 Abr 199722 Sep 1998Ethicon Endo-Surgery, Inc.Electrosurgical hemostatic device
US5820630 *22 Oct 199613 Oct 1998Annex Medical, Inc.Medical forceps jaw assembly
US5853412 *5 Mar 199729 Dic 1998Aesculap Ag & Co. KgBipolar surgical grasping instrument
US5876401 *14 Abr 19972 Mar 1999Ethicon Endo Surgery, Inc.Electrosurgical hemostatic device with adaptive electrodes
US5893863 *1 May 199713 Abr 1999Yoon; InbaeSurgical instrument with jaws and movable internal hook member for use thereof
US5906630 *30 Jun 199825 May 1999Boston Scientific LimitedEccentric surgical forceps
US5944718 *31 Jul 199731 Ago 1999Ethicon Endo-Surgery, Inc.Electrosurgical instrument end effector
US6010516 *20 Mar 19984 Ene 2000Hulka; Jaroslav F.Bipolar coaptation clamps
US6024741 *5 Mar 199715 Feb 2000Ethicon Endo-Surgery, Inc.Surgical tissue treating device with locking mechanism
US6041679 *19 Sep 199428 Mar 2000Symbiosis CorporationEndoscopic end effectors constructed from a combination of conductive and non-conductive materials and useful for selective endoscopic cautery
US6053933 *7 Ago 199725 Abr 2000Deutsches Zentrum Fur Luft- Und Raumfahrt E.V.Gripping unit for application in minimally invasive surgery
US6096037 *29 Jul 19971 Ago 2000Medtronic, Inc.Tissue sealing electrosurgery device and methods of sealing tissue
US6113596 *10 Oct 19975 Sep 2000Enable Medical CorporationCombination monopolar-bipolar electrosurgical instrument system, instrument and cable
US6183467 *30 Jul 19986 Feb 2001Xomed, Inc.Package for removable device tips
US6193718 *10 Jun 199827 Feb 2001Scimed Life Systems, Inc.Endoscopic electrocautery instrument
US6270508 *25 Oct 19997 Ago 2001Charles H. KliemanEnd effector and instrument for endoscopic and general surgery needle control
US6280458 *22 Mar 199928 Ago 2001Karl Storz Gmbh & Co. KgSurgical grasping and holding forceps
US6283961 *3 Jun 19994 Sep 2001Arthrocare CorporationApparatus for electrosurgical spine surgery
US6322561 *15 Feb 200027 Nov 2001Ethicon, Inc.Pivot screw for bipolar surgical instruments
US6398779 *30 Sep 19994 Jun 2002Sherwood Services AgVessel sealing system
US6409728 *1 Ago 200025 Jun 2002Sherwood Services AgRotatable bipolar forceps
US6419575 *14 Ago 200016 Jul 2002Sato Suisan Kabushiki KaishaCutting method of salmon ovary and apparatus for carrying out cutting method
US6419675 *3 Sep 199916 Jul 2002Conmed CorporationElectrosurgical coagulating and cutting instrument
US6443970 *24 Ene 20013 Sep 2002Ethicon, Inc.Surgical instrument with a dissecting tip
US6458128 *24 Ene 20011 Oct 2002Ethicon, Inc.Electrosurgical instrument with a longitudinal element for conducting RF energy and moving a cutting element
US6458130 *3 Abr 20011 Oct 2002Sherwood Services AgEndoscopic bipolar electrosurgical forceps
US6511480 *22 Oct 199928 Ene 2003Sherwood Services AgOpen vessel sealing forceps with disposable electrodes
US6585735 *21 Jul 20001 Jul 2003Sherwood Services AgEndoscopic bipolar electrosurgical forceps
US6620161 *24 Ene 200116 Sep 2003Ethicon, Inc.Electrosurgical instrument with an operational sequencing element
US6682528 *17 Sep 200227 Ene 2004Sherwood Services AgEndoscopic bipolar electrosurgical forceps
US6726686 *1 Abr 200227 Abr 2004Sherwood Services AgBipolar electrosurgical instrument for sealing vessels
US6743229 *1 Mar 20021 Jun 2004Sherwood Services AgBipolar electrosurgical instrument for sealing vessels
US20020188294 *5 Abr 200212 Dic 2002Couture Gary M.Vessel sealer and divider
US20030014053 *5 Abr 200216 Ene 2003Nguyen Lap P.Vessel sealing instrument
US20030018331 *25 Jun 200223 Ene 2003Dycus Sean T.Vessel sealer and divider
US20030199869 *30 Oct 200223 Oct 2003Johnson Kristin D.Vessel sealing instrument
USD295893 *25 Sep 198524 May 1988Acme United CorporationDisposable surgical clamp
USD295894 *26 Sep 198524 May 1988Acme United CorporationDisposable surgical scissors
USD449886 *23 Oct 199830 Oct 2001Sherwood Services AgForceps with disposable electrode
USD457958 *6 Abr 200128 May 2002Sherwood Services AgVessel sealer and divider
USD457959 *6 Abr 200128 May 2002Sherwood Services AgVessel sealer
USD496997 *15 May 20035 Oct 2004Sherwood Services AgVessel sealer and divider
USD499181 *15 May 200330 Nov 2004Sherwood Services AgHandle for a vessel sealer and divider
USH1904 *14 May 19973 Oct 2000Ethicon Endo-Surgery, Inc.Electrosurgical hemostatic method and device
USH2037 *14 May 19972 Jul 2002David C. YatesElectrosurgical hemostatic device including an anvil
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US7473253 *6 Abr 20016 Ene 2009Covidien AgVessel sealer and divider with non-conductive stop members
US765500718 Dic 20062 Feb 2010Covidien AgMethod of fusing biomaterials with radiofrequency energy
US768680410 Ene 200630 Mar 2010Covidien AgVessel sealer and divider with rotating sealer and cutter
US768682721 Oct 200530 Mar 2010Covidien AgMagnetic closure mechanism for hemostat
US770873519 Jul 20054 May 2010Covidien AgIncorporating rapid cooling in tissue fusion heating processes
US77226078 Nov 200625 May 2010Covidien AgIn-line vessel sealer and divider
US774461518 Jul 200629 Jun 2010Covidien AgApparatus and method for transecting tissue on a bipolar vessel sealing instrument
US775390929 Abr 200413 Jul 2010Covidien AgElectrosurgical instrument which reduces thermal damage to adjacent tissue
US77669109 Nov 20063 Ago 2010Tyco Healthcare Group LpVessel sealer and divider for large tissue structures
US77714256 Feb 200610 Ago 2010Covidien AgVessel sealer and divider having a variable jaw clamping mechanism
US777603613 Mar 200317 Ago 2010Covidien AgBipolar concentric electrode assembly for soft tissue fusion
US77760377 Jul 200617 Ago 2010Covidien AgSystem and method for controlling electrode gap during tissue sealing
US778987829 Sep 20067 Sep 2010Covidien AgIn-line vessel sealer and divider
US7799027 *15 Jul 200521 Sep 2010Erbe Elektromedizin GmbhElectrosurgical instrument
US779902826 Sep 200821 Sep 2010Covidien AgArticulating bipolar electrosurgical instrument
US78112838 Oct 200412 Oct 2010Covidien AgOpen vessel sealing instrument with hourglass cutting mechanism and over-ratchet safety
US781987229 Sep 200626 Oct 2010Covidien AgFlexible endoscopic catheter with ligasure
US782879827 Mar 20089 Nov 2010Covidien AgLaparoscopic bipolar electrosurgical instrument
US783768513 Jul 200523 Nov 2010Covidien AgSwitch mechanisms for safe activation of energy on an electrosurgical instrument
US78461585 May 20067 Dic 2010Covidien AgApparatus and method for electrode thermosurgery
US784616129 Sep 20067 Dic 2010Covidien AgInsulating boot for electrosurgical forceps
US7850688 *15 Jul 200514 Dic 2010Erbe Elektromedizin GmbhElectrosurgical instrument
US785781218 Dic 200628 Dic 2010Covidien AgVessel sealer and divider having elongated knife stroke and safety for cutting mechanism
US787785219 Sep 20081 Feb 2011Tyco Healthcare Group LpMethod of manufacturing an end effector assembly for sealing tissue
US787785319 Sep 20081 Feb 2011Tyco Healthcare Group LpMethod of manufacturing end effector assembly for sealing tissue
US78790358 Nov 20061 Feb 2011Covidien AgInsulating boot for electrosurgical forceps
US788753517 Ago 200415 Feb 2011Covidien AgVessel sealing wave jaw
US788753619 Ago 200915 Feb 2011Covidien AgVessel sealing instrument
US789687812 Mar 20091 Mar 2011Coviden AgVessel sealing instrument
US790982317 Ene 200622 Mar 2011Covidien AgOpen vessel sealing instrument
US792271812 Oct 200612 Abr 2011Covidien AgOpen vessel sealing instrument with cutting mechanism
US792295328 Sep 200612 Abr 2011Covidien AgMethod for manufacturing an end effector assembly
US793164914 Feb 200726 Abr 2011Tyco Healthcare Group LpVessel sealing instrument with electrical cutting mechanism
US793505214 Feb 20073 May 2011Covidien AgForceps with spring loaded end effector assembly
US794704119 Ago 200924 May 2011Covidien AgVessel sealing instrument
US795114917 Oct 200631 May 2011Tyco Healthcare Group LpAblative material for use with tissue treatment device
US795115022 Feb 201031 May 2011Covidien AgVessel sealer and divider with rotating sealer and cutter
US795533221 Sep 20057 Jun 2011Covidien AgMechanism for dividing tissue in a hemostat-style instrument
US796396510 May 200721 Jun 2011Covidien AgBipolar electrosurgical instrument for sealing vessels
US7972331 *14 Jul 20055 Jul 2011ERBE Elecktromedizin GmbHElectrosurgical instrument with opposing jaws, central knife, and barbs for maintaining clamping tension on tissue even after opening jaws
US7992467 *25 Ene 20089 Ago 2011Adoozie, Inc.Shingle removing apparatus
US80168279 Oct 200813 Sep 2011Tyco Healthcare Group LpApparatus, system, and method for performing an electrosurgical procedure
US80340521 Nov 201011 Oct 2011Covidien AgApparatus and method for electrode thermosurgery
US807074625 May 20076 Dic 2011Tyco Healthcare Group LpRadiofrequency fusion of cardiac tissue
US812374329 Jul 200828 Feb 2012Covidien AgMechanism for dividing tissue in a hemostat-style instrument
US812862430 May 20066 Mar 2012Covidien AgElectrosurgical instrument that directs energy delivery and protects adjacent tissue
US81424733 Oct 200827 Mar 2012Tyco Healthcare Group LpMethod of transferring rotational motion in an articulating surgical instrument
US814748917 Feb 20113 Abr 2012Covidien AgOpen vessel sealing instrument
US816297315 Ago 200824 Abr 2012Tyco Healthcare Group LpMethod of transferring pressure in an articulating surgical instrument
US81872737 May 200929 May 2012Tyco Healthcare Group LpApparatus, system, and method for performing an electrosurgical procedure
US819243321 Ago 20075 Jun 2012Covidien AgVessel sealing instrument with electrical cutting mechanism
US819747910 Dic 200812 Jun 2012Tyco Healthcare Group LpVessel sealer and divider
US819763315 Mar 201112 Jun 2012Covidien AgMethod for manufacturing an end effector assembly
US82111057 May 20073 Jul 2012Covidien AgElectrosurgical instrument which reduces collateral damage to adjacent tissue
US822141612 Sep 200817 Jul 2012Tyco Healthcare Group LpInsulating boot for electrosurgical forceps with thermoplastic clevis
US823599223 Sep 20087 Ago 2012Tyco Healthcare Group LpInsulating boot with mechanical reinforcement for electrosurgical forceps
US823599324 Sep 20087 Ago 2012Tyco Healthcare Group LpInsulating boot for electrosurgical forceps with exohinged structure
US823602523 Sep 20087 Ago 2012Tyco Healthcare Group LpSilicone insulated electrosurgical forceps
US82412825 Sep 200814 Ago 2012Tyco Healthcare Group LpVessel sealing cutting assemblies
US824128317 Sep 200814 Ago 2012Tyco Healthcare Group LpDual durometer insulating boot for electrosurgical forceps
US82412845 Ene 200914 Ago 2012Covidien AgVessel sealer and divider with non-conductive stop members
US825199623 Sep 200828 Ago 2012Tyco Healthcare Group LpInsulating sheath for electrosurgical forceps
US82573527 Sep 20104 Sep 2012Covidien AgBipolar forceps having monopolar extension
US825738715 Ago 20084 Sep 2012Tyco Healthcare Group LpMethod of transferring pressure in an articulating surgical instrument
US8266783 *28 Sep 200918 Sep 2012Tyco Healthcare Group LpMethod and system for manufacturing electrosurgical seal plates
US82679354 Abr 200718 Sep 2012Tyco Healthcare Group LpElectrosurgical instrument reducing current densities at an insulator conductor junction
US826793623 Sep 200818 Sep 2012Tyco Healthcare Group LpInsulating mechanically-interfaced adhesive for electrosurgical forceps
US827744718 Nov 20092 Oct 2012Covidien AgSingle action tissue sealer
US829822816 Sep 200830 Oct 2012Coviden AgElectrosurgical instrument which reduces collateral damage to adjacent tissue
US829823224 Mar 200930 Oct 2012Tyco Healthcare Group LpEndoscopic vessel sealer and divider for large tissue structures
US830358215 Sep 20086 Nov 2012Tyco Healthcare Group LpElectrosurgical instrument having a coated electrode utilizing an atomic layer deposition technique
US830358610 Feb 20096 Nov 2012Covidien AgSpring loaded reciprocating tissue cutting mechanism in a forceps-style electrosurgical instrument
US831778728 Ago 200827 Nov 2012Covidien LpTissue fusion jaw angle improvement
US83337654 Jun 201218 Dic 2012Covidien AgVessel sealing instrument with electrical cutting mechanism
US834894829 Jul 20108 Ene 2013Covidien AgVessel sealing system using capacitive RF dielectric heating
US836107128 Ago 200829 Ene 2013Covidien AgVessel sealing forceps with disposable electrodes
US836107219 Nov 201029 Ene 2013Covidien AgInsulating boot for electrosurgical forceps
US836670927 Dic 20115 Feb 2013Covidien AgArticulating bipolar electrosurgical instrument
US838275426 Ene 200926 Feb 2013Covidien AgElectrosurgical forceps with slow closure sealing plates and method of sealing tissue
US839409512 Ene 201112 Mar 2013Covidien AgInsulating boot for electrosurgical forceps
US839409611 Abr 201112 Mar 2013Covidien AgOpen vessel sealing instrument with cutting mechanism
US842550430 Nov 201123 Abr 2013Covidien LpRadiofrequency fusion of cardiac tissue
US84546024 May 20124 Jun 2013Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US846995621 Jul 200825 Jun 2013Covidien LpVariable resistor jaw
US84699577 Oct 200825 Jun 2013Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US848610720 Oct 200816 Jul 2013Covidien LpMethod of sealing tissue using radiofrequency energy
US849665616 Ene 200930 Jul 2013Covidien AgTissue sealer with non-conductive variable stop members and method of sealing tissue
US852389810 Ago 20123 Sep 2013Covidien LpEndoscopic electrosurgical jaws with offset knife
US853531225 Sep 200817 Sep 2013Covidien LpApparatus, system and method for performing an electrosurgical procedure
US854071111 Jul 200724 Sep 2013Covidien AgVessel sealer and divider
US85510881 Abr 20098 Oct 2013Applied Medical Resources CorporationElectrosurgical system
US855109130 Mar 20118 Oct 2013Covidien AgVessel sealing instrument with electrical cutting mechanism
US85625981 Abr 200922 Oct 2013Applied Medical Resources CorporationElectrosurgical system
US856841131 Mar 200929 Oct 2013Applied Medical Resources CorporationElectrosurgical system
US85684447 Mar 201229 Oct 2013Covidien LpMethod of transferring rotational motion in an articulating surgical instrument
US85798941 Abr 200912 Nov 2013Applied Medical Resources CorporationElectrosurgical system
US859150616 Oct 201226 Nov 2013Covidien AgVessel sealing system
US859729631 Ago 20123 Dic 2013Covidien AgBipolar forceps having monopolar extension
US859729729 Ago 20063 Dic 2013Covidien AgVessel sealing instrument with multiple electrode configurations
US862301723 Jul 20097 Ene 2014Covidien AgOpen vessel sealing instrument with hourglass cutting mechanism and overratchet safety
US86232769 Feb 20097 Ene 2014Covidien LpMethod and system for sterilizing an electrosurgical instrument
US86367619 Oct 200828 Ene 2014Covidien LpApparatus, system, and method for performing an endoscopic electrosurgical procedure
US864171315 Sep 20104 Feb 2014Covidien AgFlexible endoscopic catheter with ligasure
US864734127 Oct 200611 Feb 2014Covidien AgVessel sealer and divider for use with small trocars and cannulas
US866868919 Abr 201011 Mar 2014Covidien AgIn-line vessel sealer and divider
US867911423 Abr 201025 Mar 2014Covidien AgIncorporating rapid cooling in tissue fusion heating processes
US867914030 May 201225 Mar 2014Covidien LpSurgical clamping device with ratcheting grip lock
US86966679 Ago 201215 Abr 2014Covidien LpDual durometer insulating boot for electrosurgical forceps
US873444319 Sep 200827 May 2014Covidien LpVessel sealer and divider for large tissue structures
US874090120 Ene 20103 Jun 2014Covidien AgVessel sealing instrument with electrical cutting mechanism
US876474828 Ene 20091 Jul 2014Covidien LpEnd effector assembly for electrosurgical device and method for making the same
US878441728 Ago 200822 Jul 2014Covidien LpTissue fusion jaw angle improvement
US879527428 Ago 20085 Ago 2014Covidien LpTissue fusion jaw angle improvement
US88522288 Feb 20127 Oct 2014Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US88585544 Jun 201314 Oct 2014Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US888276624 Ene 200611 Nov 2014Covidien AgMethod and system for controlling delivery of energy to divide tissue
US889888826 Ene 20122 Dic 2014Covidien LpSystem for manufacturing electrosurgical seal plates
US89159101 Abr 200923 Dic 2014Applied Medical Resources CorporationElectrosurgical system
US8926608 *25 Sep 20086 Ene 2015Karl Storz Gmbh & Co. KgBipolar medical instrument
US8926610 *26 Sep 20066 Ene 2015Erbe Elektromedizin GmbhElectrosurgical instrument
US893997327 Nov 201327 Ene 2015Covidien AgSingle action tissue sealer
US894512510 Sep 20103 Feb 2015Covidien AgCompressible jaw configuration with bipolar RF output electrodes for soft tissue fusion
US894512627 Nov 20133 Feb 2015Covidien AgSingle action tissue sealer
US894512723 Ene 20143 Feb 2015Covidien AgSingle action tissue sealer
US896831425 Sep 20083 Mar 2015Covidien LpApparatus, system and method for performing an electrosurgical procedure
US896836025 Ene 20123 Mar 2015Covidien LpSurgical instrument with resilient driving member and related methods of use
US902304323 Sep 20085 May 2015Covidien LpInsulating mechanically-interfaced boot and jaws for electrosurgical forceps
US90284938 Mar 201212 May 2015Covidien LpIn vivo attachable and detachable end effector assembly and laparoscopic surgical instrument and methods therefor
US903969420 Oct 201126 May 2015Just Right Surgical, LlcRF generator system for surgical vessel sealing
US909534718 Sep 20084 Ago 2015Covidien AgElectrically conductive/insulative over shoe for tissue fusion
US910767219 Jul 200618 Ago 2015Covidien AgVessel sealing forceps with disposable electrodes
US91138989 Sep 201125 Ago 2015Covidien LpApparatus, system, and method for performing an electrosurgical procedure
US911390329 Oct 201225 Ago 2015Covidien LpEndoscopic vessel sealer and divider for large tissue structures
US911390520 Jun 201325 Ago 2015Covidien LpVariable resistor jaw
US911394022 Feb 201225 Ago 2015Covidien LpTrigger lockout and kickback mechanism for surgical instruments
US91444556 Jun 201129 Sep 2015Just Right Surgical, LlcLow power tissue sealing device and method
US914932325 Ene 20106 Oct 2015Covidien AgMethod of fusing biomaterials with radiofrequency energy
US9173707 *26 Jun 20133 Nov 2015City Of HopeCoaptive surgical sealing tool
US9186214 *15 Mar 201317 Nov 2015City Of HopeCoaptive surgical sealing tool
US9186215 *9 Jul 201417 Nov 2015City Of HopeMicrowave coaptive surgical sealing tool
US91987172 Feb 20151 Dic 2015Covidien AgSingle action tissue sealer
US924798821 Jul 20152 Feb 2016Covidien LpVariable resistor jaw
US92655522 Dic 201423 Feb 2016Covidien LpMethod of manufacturing electrosurgical seal plates
US9265565 *29 Nov 201123 Feb 2016Covidien LpOpen vessel sealing instrument and method of manufacturing the same
US93205636 Feb 201226 Abr 2016Applied Medical Resources CorporationElectrosurgical instruments and connections thereto
US934553514 Oct 201424 May 2016Covidien LpApparatus, system and method for performing an electrosurgical procedure
US937525425 Sep 200828 Jun 2016Covidien LpSeal and separate algorithm
US93752705 Nov 201328 Jun 2016Covidien AgVessel sealing system
US93752715 Nov 201328 Jun 2016Covidien AgVessel sealing system
US94630675 Nov 201311 Oct 2016Covidien AgVessel sealing system
US948052620 Oct 20151 Nov 2016City Of HopeMicrowave coaptive surgical sealing tool
US9492222 *16 Nov 201515 Nov 2016City Of HopeCoaptive surgical sealing tool
US949222511 Feb 201415 Nov 2016Covidien AgVessel sealer and divider for use with small trocars and cannulas
US95045142 Mar 201529 Nov 2016Covidien LpSurgical instrument with resilient driving member and related methods of use
US95390539 May 201410 Ene 2017Covidien LpVessel sealer and divider for large tissue structures
US954977511 Mar 201424 Ene 2017Covidien AgIn-line vessel sealer and divider
US955484110 Abr 201431 Ene 2017Covidien LpDual durometer insulating boot for electrosurgical forceps
US95548448 Feb 201631 Ene 2017Covidien LpOpen vessel sealing instrument and method of manufacturing the same
US956610811 Nov 201314 Feb 2017Applied Medical Resources CorporationElectrosurgical system
US95791454 Feb 201428 Feb 2017Covidien AgFlexible endoscopic catheter with ligasure
US95857163 Jun 20147 Mar 2017Covidien AgVessel sealing instrument with electrical cutting mechanism
US960365221 Ago 200828 Mar 2017Covidien LpElectrosurgical instrument including a sensor
US9629676 *21 Dic 201525 Abr 2017City Of HopeSurgical sealing tool
US963616919 Sep 20112 May 2017Covidien LpElectrosurgical instrument
US96491495 May 201516 May 2017Just Right Surgical, LlcRF generator system for surgical vessel sealing
US96556741 Oct 201423 May 2017Covidien LpApparatus, system and method for performing an electrosurgical procedure
US973735724 Sep 201322 Ago 2017Covidien AgVessel sealer and divider
US975056122 Feb 20165 Sep 2017Covidien LpSystem for manufacturing electrosurgical seal plates
US20070185487 *14 Jul 20059 Ago 2007Erbe Elektromedizin GmbhElectrosurgical instrument
US20070233060 *15 Jul 20054 Oct 2007Dieter HafnerElectrosurgical instrument
US20080071268 *15 Jul 200520 Mar 2008Erbe Elektromedizin GmbhElectrosurgical Instrument
US20080215048 *26 Sep 20064 Sep 2008Dieter HafnerElectrosurgical Instrument
US20090082768 *25 Sep 200826 Mar 2009Uwe BacherBipolar Medical Instrument
US20090188350 *25 Ene 200830 Jul 2009Becoat BillShingle removing apparatus
US20100042142 *15 Ago 200818 Feb 2010Cunningham James SMethod of Transferring Pressure in an Articulating Surgical Instrument
US20100286691 *7 May 200911 Nov 2010Tyco Healthcare Group LpApparatus, System, and Method for Performing an Electrosurgical Procedure
US20110060335 *10 Sep 200910 Mar 2011Tyco Healthcare Group LpApparatus for Tissue Fusion and Method of Use
US20110072638 *28 Sep 200931 Mar 2011Tyco Healthcare Group LpMethod and System for Manufacturing Electrosurgical Seal Plates
US20120172868 *30 Dic 20105 Jul 2012Tyco Healthcare Group LpApparatus for Performing an Electrosurgical Procedure
US20130138101 *29 Nov 201130 May 2013Tyco Healthcare Group LpOpen Vessel Sealing Instrument and Method of Manufacturing the Same
US20140088582 *15 Mar 201327 Mar 2014City Of HopeCoaptive surgical sealing tool
US20140088583 *26 Jun 201327 Mar 2014City Of HopeCoaptive surgical sealing tool
US20140371738 *9 Jul 201418 Dic 2014City Of HopeMicrowave coaptive surgical sealing tool
US20160184005 *21 Dic 201530 Jun 2016City Of HopeSurgical sealing tool
US20170128121 *19 Ene 201711 May 2017Olympus CorporationTreatment instrument and treatment system
US20170135752 *21 Oct 201618 May 2017City Of HopeCoaptive surgical sealing tool
USD64924915 Feb 200722 Nov 2011Tyco Healthcare Group LpEnd effectors of an elongated dissecting and dividing instrument
USD68022012 Ene 201216 Abr 2013Coviden IPSlider handle for laparoscopic device
USD7269105 Feb 201414 Abr 2015Covidien LpReusable forceps for open vessel sealer with mechanical cutter
USD7369205 Feb 201418 Ago 2015Covidien LpOpen vessel sealer with mechanical cutter
USD7374395 Feb 201425 Ago 2015Covidien LpOpen vessel sealer with mechanical cutter
USD7384995 Feb 20148 Sep 2015Covidien LpOpen vessel sealer with mechanical cutter
USD7446445 Feb 20141 Dic 2015Covidien LpDisposable housing for open vessel sealer with mechanical cutter
USD74825929 Dic 201426 Ene 2016Applied Medical Resources CorporationElectrosurgical instrument
USD761961 *7 May 201519 Jul 2016Karl Storz Gmbh & Co. KgForceps insert for laparoscopic procedures
USD77419016 Jul 201513 Dic 2016Covidien LpOpen vessel sealer with mechanical cutter
USD77533324 Ago 201527 Dic 2016Covidien LpOpen vessel sealer with mechanical cutter
USRE448347 Dic 20128 Abr 2014Covidien AgInsulating boot for electrosurgical forceps
EP1532933A1 *22 Nov 200425 May 2005Sherwood Services AGElectrically conductive/insulative over-shoe for tissue fusion
EP1787596B1 *21 Nov 20068 Ago 2012Covidien AGA bipolar electrosurgical sealing instrument having an improved tissue gripping device
EP2147649A1 *17 Jul 200927 Ene 2010Tyco Healthcare Group LPBipolar forceps with variable resistor jaw
WO2014172589A1 *17 Abr 201423 Oct 2014Sp Surgical Inc.Method and apparatus for passing suture
Clasificaciones
Clasificación de EE.UU.606/51
Clasificación internacionalA61B1/00, A61B18/14, A61B18/12, A61B17/28
Clasificación cooperativaA61B2018/126, A61B2018/1861, A61B2018/00916, A61B18/1445, A61B2090/034, A61B2018/0063
Clasificación europeaA61B18/14F2