WO2001015614A1 - Bipolares medizinisches instrument - Google Patents
Bipolares medizinisches instrument Download PDFInfo
- Publication number
- WO2001015614A1 WO2001015614A1 PCT/EP2000/008072 EP0008072W WO0115614A1 WO 2001015614 A1 WO2001015614 A1 WO 2001015614A1 EP 0008072 W EP0008072 W EP 0008072W WO 0115614 A1 WO0115614 A1 WO 0115614A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- jaw
- jaw part
- base body
- instrument according
- force transmission
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1442—Probes having pivoting end effectors, e.g. forceps
- A61B18/1445—Probes having pivoting end effectors, e.g. forceps at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
Definitions
- the invention relates to a bipolar medical instrument, with a tubular shaft, with at least two jaw parts, which are arranged to be movable relative to one another at the distal end of the tubular shaft and are connected to one another by a joint and each form a working electrode of different polarity, each jaw part being assigned a separate power line , one of which is formed by an axially movable force transmission element arranged in the tubular shaft, which is non-positively connected to at least one of the jaw parts.
- a bipolar medical instrument with a tubular shaft, with at least two jaw parts, which are arranged to be movable relative to one another at the distal end of the tubular shaft and are connected to one another by a joint and each form a working electrode of different polarity, each jaw part being assigned a separate power line , one of which is formed by an axially movable force transmission element arranged in the tubular shaft, which is non-positively connected to at least one of the jaw parts.
- Such an instrument is known from DE
- an instrument of the type mentioned at the outset is used to carry out endoscopic interventions in the human or animal body.
- the two jaw parts at the distal end of the tubular shaft are connected to one another via a joint and can thus be closed and opened by actuating a handle on the proximal end of the tubular shaft.
- the jaw parts are designed as cutting tools with cutting edges in order to separate tissue in the body, or as grasping tools with correspondingly butt-jointing surfaces in order to grip separated tissue with the jaw parts and to remove them from the body, or in order to to hold an organ or a vessel in order to move it out of the operating area.
- the jaw parts can also have a combination of a cutting and a barrel function.
- At least one of the two jaw parts is articulated to the tubular shaft, while the other jaw part is rigidly or likewise articulated to the tubular shaft.
- both jaw parts each form a working electrode of different polarity to which high-frequency current can be applied. Accordingly, both jaw parts can be connected separately to one pole of a high-frequency voltage source.
- bipolar high-frequency current to the two jaw parts, on the one hand, in the case of training as cutting tools the cutting action can be increased by the thermal action of the high-frequency current in the tissue, on the other hand, in the case of training as a gripping tool, tissue gripped by the heat development between the jaw parts can coagulate and bleeding of the tissue can thus be stopped.
- the two jaw parts are made entirely of metal and are therefore electrically conductive over their entire body.
- a force transmission element in the form of a push and pull rod is connected to the two movable jaw parts via a toggle lever arrangement.
- the push and pull rod also serves as a power line in order to be able to connect one of the two jaw parts to the one pole of a high-frequency voltage source.
- the electrical insulation of the two jaw parts is accomplished in that the otherwise Most metallic joint of the two jaw parts ceramic elements are used, which thus form part of the joint.
- this type of electrical insulation of the two jaw parts from one another in the region of the joint has the disadvantage that the miniaturization of this instrument also means that the ceramic elements must be reduced in thickness. Since a high-frequency voltage of the order of 2.5 kV is usually applied to the jaw parts, this means that when the thickness of the ceramic elements is reduced, a voltage breakdown can occur through the ceramic element. Another disadvantage of the ceramic elements is that friction occurs on the ceramic elements used when the jaw parts are moved, so that they can be ground over time. Another disadvantage of the design of the known instrument is that due to the ceramic elements provided, the number of parts of the pliers in the area of the jaw parts and thus the construction and manufacturing costs of this known instrument is disadvantageously increased.
- DE 43 12 284 AI discloses a bipolar medical instrument in which the jaw parts consist entirely of plastic, with end sections of power lines that are stripped of insulation being embedded in the plastic.
- the jaw parts are designed as plastic cutting elements, with working electrodes being embedded in the plastic of the jaw parts.
- the current supply to the jaw parts is carried out by separate electrical lines which run insulated in the interior of the push and pull rod.
- the push and pull rod does not serve as a power line with this pliers. So there is again this instrument the disadvantage that the number of parts required is increased due to the additional power lines.
- a further disadvantage is that the end sections of the power lines which run into the plastic of the jaw parts are each subjected to bending when the jaw parts are opened and closed, so that the end sections can break over time and the current flow to the electrodes is thus interrupted.
- An instrument similar to the aforementioned known instrument is known from WO 99/40861.
- This known medical bipolar instrument has two jaw parts which are movable relative to one another at the distal end of the shaft, one jaw part being movable and the other jaw part being immovable.
- the movable jaw part is biased by a spring into a position in which it is pivoted away from the immovable jaw part, ie is in the open position.
- An axially displaceable tubular shaft surrounding the shaft is provided as the actuating mechanism for the movable jaw part, which slides by sliding in the distal direction onto the outside of the movable jaw part and thereby presses it against the immovable jaw part.
- the movable jaw part is articulated to the immovable jaw part via a pin joint.
- the two jaw parts again consist entirely of plastic, metallic electrodes being attached to the plastic. Individual wires, which are connected to the electrodes, in turn serve as power supply to the electrodes.
- the invention is therefore based on the object of developing a bipolar medical instrument of the type mentioned in such a way that reliable isolation of the jaw parts in the region of their joint is achieved without increased expenditure on parts and with little design effort.
- this object is achieved in a bipolar medical instrument of the type mentioned at the outset in that at least one of the jaw parts, at least in the region of the joint, has a one-piece base body made of an electrically insulating material, to which an electrically conductive jaw part insert forming the associated working electrode is attached, which is electrically conductively connected to the power line assigned to it.
- an electrically insulating base body can be formed, for example, from a hard plastic, so that the instrument meets the high stability requirements in the area of its jaw parts. Because the joint of the connection between the first jaw part and the second jaw part is now provided in the region of the one-piece insulating base body, electrical separation of the two jaw parts from one another is accomplished without additional components, such as ceramic elements.
- the base body made of insulating material can be made particularly solid, so that the stability of this jaw part and the stability of the joint is as high as if the jaw parts were made entirely of metal.
- This configuration is suitable for instruments whose two jaw parts are movable as well for instruments in which only one of the jaw parts is movable.
- a hinge pin of the joint which connects the two jaw parts to one another in an articulated manner, can even be made of metal in the embodiment according to the invention, since the base body consisting of the insulation material reliably prevents current transmission to the other jaw part.
- the at least one jaw part which has the base body made of electrically insulating material, can be the immovable jaw part, for example, in the case of only one movable jaw part, while the other, movable jaw part, which is non-positively connected to the force transmission element, can be made of metal overall without that a current transmission from this movable jaw part to the immovable jaw part occurs through the joint. In this way, the desired current flow between the force transmission element on the movable jaw part can take place without further measures of electrical connections. While the instrument known from DE 196 08 716 Cl also requires an insulating ceramic element in the region of the articulation of the push and pull rod on the toggle lever arrangement, such an additional insulation part is not required in the present invention. Overall, the invention achieves a particularly simple construction of the instrument that requires few parts.
- the base body has a distal section in which the jaw part insert arranged therein is encased on the outside in an insulated manner.
- the jaw part insert is non-positively and positively connected to the base body.
- the non-positive and positive connection has the advantage that the mouthpiece insert is securely anchored to the base body.
- the non-positive and positive connection is to be understood in the manner of a toothing between the jaw part insert and the base body, which prevents the jaw part insert from being lifted off the base body.
- Such a connection can be made, for example, in the form of a T-shaped groove in the base body and a complementary T-shaped tongue on the jaw part insert.
- a non-positive and positive connection has the particular advantage of high mechanical resistance, which cannot be achieved by pouring or embedding the jaw insert in the base body, as is provided in the prior art.
- such a connection is particularly temperature-resistant, since no integral connection is required here, as is the case with gluing.
- the jaw part insert is fastened to the base body by a dovetail connection.
- the jaw part insert can additionally be secured at its proximal end by means of a screw or a pin against a relative displacement relative to the base body.
- one of the jaw parts is immovably connected to the tubular shaft, and at least this jaw part has the base body made of electrically insulating material.
- the movable jaw part can be made entirely of metal, as a result of which the power transmission from the power transmission element to the movable jaw part can be accomplished in a very simple manner. Since the immovable jaw part is fastened to the tubular shaft and correspondingly corresponds to the diameter of the tubular shaft in terms of its proximal section, the measure mentioned has the further advantage that the immovable jaw part can be formed with a base body made of insulating material with particularly high rigidity.
- both jaw parts each have a base body made of an electrically insulating material, on which an electrically conductive jaw part insert forming the respective working electrode of the jaw parts is arranged.
- both jaw parts are completely insulated on the outside, at least in their proximal area, so that only the tissue coming into contact with the jaw part inserts is acted upon by the high-frequency current.
- the tubular shaft forms the other power line and is connected to the other jaw part in an electrically conductive manner, insulated from the force transmission element.
- At least the jaw part connected to the force transmission element has the base body made of insulating material, in which case the force transmission element is articulated to a proximal section of the base body, on which there is an electrically conductive connecting element which electrically conductively connects the force transmission element with the associated one Muzzle insert connects.
- the movable jaw part has a base body made of an electrically insulating material
- the proximal section of the base body made of insulation material is bridged by the electrically conductive connecting element for current transmission to the jaw part insert, without the electrically conductive connecting element being subjected to bending when the jaw part is moved, since an articulated connection and no joint between the force transmission element and the connecting element flexible connection exists. It is preferred if a joint pin of the joint connecting the first jaw part to the second jaw part passes through the connecting element.
- the connecting element reinforces the hinge pin and prevents the hinge pin from working freely in the non-metallic proximal section of the two jaw parts.
- the hinge pin of the hinge can be electrically insulated, for example by means of a corresponding sheathing, so that, in the event that the two ends of the hinge pin are exposed, the entire outside of the instrument is insulated in the region of the hinge of the jaw parts.
- the force transmission element is connected to a power supply via a spring-loaded contact in a proximal area of the force transmission element.
- the current transfer by means of a spring-loaded contact results in the advantage of a structurally particularly simple current transfer to the axially movable power transmission element, which has the further advantage that the power supply itself, for example in the form of a plug housing or plug connection for a power cable, is arranged in a fixed manner on the instrument itself can be.
- the spring-loaded contact is a sliding contact, for example an elongated metallic element in the form of a leaf spring, and / or the contact has a counter to the force transmission element Element pressed by spring force, in particular a ball.
- the spring-loaded contact is a sliding contact, for example an elongated metallic element in the form of a leaf spring, and / or the contact has a counter to the force transmission element Element pressed by spring force, in particular a ball.
- the jaw part insert of the jaw part which is immovably connected to the tubular shaft is electrically conductively connected to the tubular shaft via an electrically conductive wire element which is embedded in the proximal section of the second base body.
- This measure advantageously creates an electrically conductive connection between the tubular shaft and the mouthpiece insert of the immovable jaw part, which is insulated from the force transmission element by the embedding in the base body of the immovable jaw part. Since the jaw part is immovable, the wire element is not subjected to bending. Furthermore, the wire element is protected against mechanical influences by being embedded in the base body of the immovable jaw part.
- a proximal section of the second jaw part has a cutout with two legs extending in the longitudinal direction, between which the base body of the first jaw part is arranged and articulated to the legs.
- a proximal section of the first jaw part has a fork section into which the force transmission element engages.
- This measure has the further advantage that the articulation of the force transmission element on the movable jaw part can be accomplished in a particularly stable manner and takes up little space.
- the base body of one jaw part and / or optionally the base body of the second jaw part consist of a hard, in particular temperature-resistant plastic.
- a particularly high stability of the base body of the jaw parts is achieved by this measure. If the plastic is also temperature-resistant, this has the advantage that the jaw parts can be sterilized in an autoclave. Such hard plastics are generally known and available.
- the pliers according to the invention can be designed both as a gripping instrument in that opposing inner sides of the working electrodes are flat, or as a cutting instrument by the opposite inner sides of the working electrodes being designed as cutting elements. In both types of instruments, the above-mentioned configurations according to the invention can be used advantageously. If the working electrodes are designed as gripping tools, it is further preferred to make them V-shaped in cross-section to complement one another, thereby avoiding lateral deflection of the tissue to be gripped. In the event that the working electrodes are designed as cutting elements, it is preferred if the inside of one working electrode has a longitudinally extending notch and the inside of the other working electrode has a cutting edge which cooperates with the notch.
- This configuration of the jaw parts is similar to that of anvil pliers with which high cutting forces can be transferred to the tissue to be cut.
- Figure 1 is an overall view of a bipolar medical forceps according to the invention in side view.
- FIG. 2 shows a perspective view of the pliers in FIG. 1 in the area of the jaw parts on a greatly enlarged scale
- 3 shows a longitudinal section through the pliers in the area of the jaw parts, the jaw parts taking up their open position
- FIG. 4 shows a representation corresponding to FIG. 3, in which the jaw parts assume their closed position
- Figure 5 is an extremely schematic, partially broken away representation of the proximal end of the forceps.
- Fig. 6 is a section along the line VI-VI in Fig. 3;
- Fig. 7 is a section along the line VII-VII in Fig. 3;
- Fig. 8 is a section along the line VIII-VIII in Fig. 3;
- FIG. 9 shows a side view of the jaw part insert in FIG. 8 without the associated base body
- FIG. 10 shows a further exemplary embodiment for the shape of the jaw part inserts in cross section
- FIG. 11 shows a still further exemplary embodiment of a jaw part insert in a side view
- FIG. 12 shows a plan view of the jaw part insert in FIG. 11;
- FIG. 13 shows a still further exemplary embodiment for the shaping of the jaw part inserts in a perspective illustration
- 14 shows a still further exemplary embodiment for jaw part inserts in cross section
- FIG. 15 shows an illustration corresponding to FIG. 5 of the proximal end of the forceps according to a further exemplary embodiment.
- FIG. 16 shows a detail from FIG. 15 on an enlarged scale in a side view rotated by 90 °.
- FIGS. 2 to 9 show a bipolar medical instrument which is provided with the general reference number 10. Details of the instrument 10 are shown in FIGS. 2 to 9.
- the instrument 10 is used in the context of minimally invasive surgery for the treatment of tissue in the human or animal body for preparation by means of high-frequency current.
- the instrument 10 is a grasping instrument or grasping forceps, as will be explained in more detail below.
- the instrument 10 has an elongated tubular shaft 12.
- the tubular shaft 12 is a metallic tube designed as a current conductor, which is surrounded by an insulating sheath 14.
- a first jaw part 16 is arranged at the distal end of the tubular shaft 12.
- a second jaw part 18 is also arranged at the distal end of the tubular shaft 12.
- the first jaw part 16 and the second jaw part 18 are movable relative to one another.
- the first jaw part 16 is movably connected to the tubular shaft 12 and the second jaw part 18 is immovably connected to the tubular shaft 12.
- the first jaw part 16 and the second jaw part 18 are connected to one another in an articulated manner via a joint 20.
- the instrument 10 also has a handle 22 at its proximal end, which has a first, movable handle part 24 and a second, immovable handle part 26.
- a force transmission element 28 extends between the movable grip part 24 and the movable jaw part 16, which is designed here in the form of a push and pull rod.
- the force transmission element 28 is arranged to be axially movable in the tubular shaft 12.
- the force transmission element 28 With its proximal end 30, the force transmission element 28 is non-positively connected to the movable handle part 24, for example by means of a ball head-ball socket connection. With its distal end 32, the force transmission element 28 is non-positively connected to the movable jaw part 16, as will be explained in more detail below.
- an inclined plug connection 34 is arranged at the proximal end of the instrument 10, via which the instrument 10 can be connected to an external high-frequency voltage source, not shown.
- the two jaw parts 16 and 18 each form a working electrode 36 and 38 of different polarity, ie the working electrode 36 is connected in operation to one pole of the high-frequency voltage source, while the working electrode 38 is connected to the other pole of the high-frequency voltage source.
- the power transmission element 28 also serves as a power line and is correspondingly metallic.
- the force transmission element 28 is insulated from the metallic tubular shaft 12 by an insulating sheath 40 which is applied to the force transmission element 28.
- the force transmission element 28 serves as an electrically conductive connection to the first jaw part 16, while the tubular shaft 12 serves as an electrical connection to the second jaw part 18, as will be described in detail hereinafter.
- the instrument 10 in the region of its distal end will now be described in more detail with reference to FIGS. 2 to 4 and 6 to 9.
- the second jaw part 18 has a one-piece base body 42 made of an electrically insulating material.
- This material is, for example, a hard, temperature-resistant plastic that has a high flexural strength.
- the base body 42 has a distal section 44 and a proximal section 46.
- a jaw insert 48 which is designed to be electrically conductive is, and preferably consists of metal.
- the jaw insert 48 forms the working electrode 38.
- the distal section 44 of the base body 42 surrounds the jaw part insert 48 arranged therein in an insulating manner on the outside, so that no current transmission can take place to tissue coming into contact with the outside of the base body 42 opposite the jaw part insert 48.
- the jaw part insert 48 has a dovetail-shaped strip or tongue 50, with which the jaw part insert 48 is connected to the base body 42 in a complementary manner in a groove 51 of the base body 42 in a positive and positive manner.
- the dovetail-shaped spring 50 is also electrically conductive, i.e. metallic and extends to the distal tip of the jaw part 18, where it is not isolated from the outside.
- the jaw part insert 48 is screwed to the base body 42 by means of a screw 52 and thus additionally secured to the base body 42 against a relative displacement to the base body 42.
- the proximal section 46 of the base body 42 is firmly connected to the tubular shaft 12 in a press fit by means of a plug-in sleeve 54 which is integrally connected thereto and which also consists of the same electrically insulating material and, if appropriate, is secured by means of an adhesive.
- the tubular shaft 12 is connected in an electrically conductive manner to the jaw part insert 48 of the second jaw part 18 via an electrically conductive wire element 56.
- the wire element 56 is embedded in the base body 42 to the side of the longitudinal central axis of the base body 42, for which purpose there is a bore extending in the base body 42, which has an open groove at its proximal end 58 ends.
- a distal end 60 of the wire element 56 protrudes into the jaw part insert 48 (see FIG. 8), so that current transmission from the wire element 56 to the jaw part insert 48 is ensured.
- the aforementioned bore also extends through the jaw insert 48 and ends distally in an opening 62.
- the opening 62 serves for easier insertion of the wire element 56 into the jaw insert 48 and the base body 42 and is then filled with an electrically insulating filling compound, for example one Adhesive, sealed.
- the distal end 60 of the wire element 56 is approximately half the length of the jaw insert 48.
- the first jaw part 16 also has a one-piece base body 62 made of an electrically insulating material.
- the base body 62 has a distal section 64, in which an electrically conductive jaw insert 66 forming the working electrode 36 is arranged.
- the distal section 64 of the base body 62 and the jaw part insert 66 correspond to the distal section 44 of the base body 42 and the jaw part insert 48, so that a detailed description is unnecessary here.
- the jaw insert 66 is additionally fixed at its proximal end to the base body 62 by a pin 68.
- the proximal section 46 of the base body 42 of the jaw part 18 has an opening 70 between the plug-in sleeve 54 and the distal section 44, in which a proximal section 72 of the base body 62 of the first jaw part 16 is arranged.
- the cutout 70 is approximately rectangular in shape and forms two legs 74, of which the left leg 74 can be seen in FIGS. 3 and 4.
- the legs 74 connect the plug-in sleeve 54 and the distal section 44 of the base body 42 to one another in one piece and accordingly likewise consist of the same electrically insulating material.
- the joint 20 is formed by a joint pin 74 which passes through the legs 74 of the base body 42 and through the proximal section 72 of the base body 62.
- the hinge pin 74 is electrically insulated at least at the ends that are exposed on the base body 42.
- the proximal section 72 of the base body 62 of the first jaw part 16 is designed in the form of a fork section 76, into which the force transmission element 28 engages.
- the force transmission element 28 has at its distal end a linkage section 78 which is designed in the form of an angle. 3, is attached to the distal end of the force transmission element 28, although an integral design with the rest of the body of the force transmission element 28 is also possible.
- the articulation section 78 of the force transmission element 28 is not insulated on its outside, but can also have an insulating coating, although this is not necessary here.
- the articulation section 78 is non-positively connected to the proximal section of the base body 62 via a articulation pin 80, the articulation pin 80 being electrically conductive and having no insulating sheath.
- an electrically conductive connecting element 82 is arranged between the articulation section 78 and the jaw insert 66, which is firmly connected to the fork section 76 of the base body 62, but is articulated to the force transmission element 28 the electric conductive pin 68, the connecting element 82 is finally electrically connected to the jaw insert 66.
- the current flow between the force transmission element 28 and the jaw insert 66 takes place via the articulation section 78, the connecting element 82, the pin 68. This current flow is indicated in FIG. 3 with a plus sign.
- the hinge pin 80 is also involved in the current flow.
- the jaw inserts 66 and 48 form working electrodes 36 and 38, the effective working surface of which form butting surfaces so that the working electrodes 36 and 38 are designed as gripping tools, so that the instrument 10 is used as gripping pliers.
- the abutting working surfaces of the jaw inserts 66 and 48 are corrugated, as can be seen in particular in FIG. 2.
- FIG. 10 shows an embodiment which is modified compared to the jaw part inserts 48 and 66, in which the jaw part inserts 48 'and 66', which are shown in FIG. 10 without the associated base body, have working surfaces which have a V-shape which is complementary to one another in cross section exhibit.
- 11 and 12 is a further exemplary embodiment for a possible configuration of jaw part inserts 48 ′′ or 66 ′′, which is particularly suitable for particularly slim jaw parts.
- jaw part inserts 48 "and 66" only have the dovetail-shaped spring 50 "at their proximal end, so that the jaw part inserts 48" 'and 66' 'only have a corresponding base body at their proximal end, like him 11 and 12 are not positively and positively connected, while their distal section 67 is not framed by the base body.
- the distal section 67 of the jaw part inserts 48 "" and 66 is not on the outside isolated.
- FIG. 13 shows a further exemplary embodiment for jaw part inserts 104 and 106 for use with the instrument 10.
- the jaw part inserts 104 and 106 form working electrodes 36 'and 38', respectively, which are designed as cutting tools.
- the jaw insert 104 has a cutting edge 108, which cooperates with a notch 110 in a cutting manner.
- FIG. 14 shows an exemplary embodiment in which a notch 112 of a jaw insert 106 'is rectangular in cross section.
- a jaw part insert 104 ' which interacts with the jaw part insert 106' is modified with respect to the jaw part insert 104 in such a way that the jaw part insert 104 'extends laterally approximately as wide as the jaw part insert 106'.
- the jaw part inserts 104 'and 106' When the jaw parts which have the jaw part inserts 104 'and 106' are closed, the jaw part inserts 104 'and 106' thus lie flat on one another at their lateral areas.
- the instrument 10 is thus used as a bipolar electric cutting instrument.
- FIG. 5 it is further shown that the current transmission from the plug pole of the plug connection 34 assigned to the force transmission element 28 takes place via a spring-loaded contact which is designed as a sliding contact 84 and is formed from a spring wire which is elastic against a non-insulated section 86 of the force transmission element 28.
- a second contact 88 presses against a non-insulated proximal end 90 of the tubular shaft 12 in order to conductively connect the tubular shaft 12 to the other plug pole of the plug connection 34.
- the tubular shaft 12 is immovable, so that the contact 88 is not a sliding contact.
- FIGS. 15 and 16 show an embodiment of the proximal end of the instrument 10 which is modified compared to FIG. 5, the same or comparable parts being provided with the same reference numerals with the embodiment in FIG. 5.
- a plug connection 34 ' is approximately perpendicular to the instrument axis.
- the current is transmitted to the force transmission element 28 by means of a spring-loaded contact 96, the contact between the corresponding supply line and the force transmission element 28 being effected by a spring-loaded contact 96.
- Loaded ball 98 is produced, which is held in a housing 100 and pressed down against the force transmission element 28 by means of a spring, not shown, arranged in the housing 100.
- Another spring-loaded contact 102 which corresponds in its construction to contact 96, is used for current transmission to the tubular shaft 12, an insulating element 104 being provided at the proximal end of the tubular shaft 12 for current separation between the force transmission element 28 and the tubular shaft 12.
- the contacts 96 and 102 are received in corresponding receptacles 106 and 108 isolated from one another at the plug connection 34 '.
- the tubular shaft 12 can be rotated together with the force transmission element 28 and the jaw parts 16 and 18 about the longitudinal axis, for which purpose an adjusting wheel 94 is provided which is connected to the tubular shaft 12.
- a catch 92 is provided, via which the tubular shaft 12 and thus the force transmission element 28 are detachably locked by the handle 22.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50008973T DE50008973D1 (de) | 1999-08-27 | 2000-08-18 | Bipolares medizinisches instrument |
EP00956462A EP1211995B1 (de) | 1999-08-27 | 2000-08-18 | Bipolares medizinisches instrument |
US10/084,562 US6669696B2 (en) | 1999-08-27 | 2002-02-26 | Bipolar medical instrument |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19940689A DE19940689A1 (de) | 1999-08-27 | 1999-08-27 | Bipolares medizinisches Instrument |
DE19940689.8 | 1999-08-27 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/084,562 Continuation US6669696B2 (en) | 1999-08-27 | 2002-02-26 | Bipolar medical instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001015614A1 true WO2001015614A1 (de) | 2001-03-08 |
Family
ID=7919807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/008072 WO2001015614A1 (de) | 1999-08-27 | 2000-08-18 | Bipolares medizinisches instrument |
Country Status (4)
Country | Link |
---|---|
US (1) | US6669696B2 (de) |
EP (1) | EP1211995B1 (de) |
DE (2) | DE19940689A1 (de) |
WO (1) | WO2001015614A1 (de) |
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US7857812B2 (en) * | 2003-06-13 | 2010-12-28 | Covidien Ag | Vessel sealer and divider having elongated knife stroke and safety for cutting mechanism |
US8123746B2 (en) | 2003-04-28 | 2012-02-28 | Olympus Corporation | High-frequency current treatment tool |
US8523898B2 (en) | 2009-07-08 | 2013-09-03 | Covidien Lp | Endoscopic electrosurgical jaws with offset knife |
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US8852185B2 (en) | 2011-05-19 | 2014-10-07 | Covidien Lp | Apparatus for performing an electrosurgical procedure |
US8858554B2 (en) | 2009-05-07 | 2014-10-14 | Covidien Lp | Apparatus, system, and method for performing an electrosurgical procedure |
US8864753B2 (en) | 2011-12-13 | 2014-10-21 | Covidien Lp | Surgical Forceps Connected to Treatment Light Source |
US8864795B2 (en) | 2011-10-03 | 2014-10-21 | Covidien Lp | Surgical forceps |
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Also Published As
Publication number | Publication date |
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DE50008973D1 (de) | 2005-01-20 |
US6669696B2 (en) | 2003-12-30 |
US20020128649A1 (en) | 2002-09-12 |
DE19940689A1 (de) | 2001-04-05 |
EP1211995B1 (de) | 2004-12-15 |
EP1211995A1 (de) | 2002-06-12 |
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