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 publicaciónUS3886944 A
Tipo de publicaciónConcesión
Fecha de publicación3 Jun 1975
Fecha de presentación19 Nov 1973
Fecha de prioridad19 Nov 1973
Número de publicaciónUS 3886944 A, US 3886944A, US-A-3886944, US3886944 A, US3886944A
InventoresJamshidi Khosrow
Cesionario originalJamshidi Khosrow
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Microcautery device
US 3886944 A
Resumen  disponible en
Imágenes(1)
Previous page
Next page
Reclamaciones  disponible en
Descripción  (El texto procesado por OCR puede contener errores)

United States Patent 91 Jamshidi June 3,1975

[ MICROCAUTERY DEVICE [76] Inventor: Khosrow Jamshidi, 610 Winston Court, Minneapolis, Minn. 55118 [22] Filed: Nov. 19, 1973 [21] Appl. No.: 416,760

[52] US. Cl 128/303.1; 219/233 [51] Int. Cl. A6lb 17/36; A61h 3/06 [58] Field of Search 128/2 B, 303.17, 303.14,

[56] References Cited UNITED STATES PATENTS 2,430,666 11/1947 Burger 219/233 3,141,087 7/1964 Schoenwald 219/233 3,234,356 2/1966 Babb l28/303.14 3,301,258 l/l967 Werner et a1 128/303.1 3,526,750 9/1970 Siegal l28/303.l4 3,558,854 1/1971 Sie gal l28/303.14 3,598,108 8/1971 Jamshidi.... 128/2 B 3,630,192 12/1971 Jamshidi 128/2 B 3,685,518 8/1972 Beverle et a1 l28/303.l7 3,698,394 10/1972 Piper et al. 219/233 X Primary ExaminerRichard A. Gaudet Assistant ExaminerLee S. Cohen [57] ABSTRACT A microcautery device particularly adapted for use in connection with the cauterization of elongated unnatural openings of small diameter formed in a body, for example, for biopsy purposes, the device including a gripping handle having an elongated tubular metallic shaft of small diameter extending from one end of the handle. The metallic shaft consists of a shank portion having a generally cylindrical tip portion with an electrically resistive closed tip end coupled thereto at the end thereof, with the body of the tip portion extending in continuation with the shank portion. An electrically insulated highly conductive electrical conductor is disposed within the confines of the tubular shaft and extends from the handle to the tip of the shaft, and is electrically coupled to the tip portion along the inner surface of the closed tip end. A source of electrical energy is coupled across the electrical conductor and the proximate end of the tubular metallic shaft, so as to complete an electrical circuit. The cauterizing device is arranged to be inserted in the opening formed in the body being treated, energized to cauterizing temperatures, and removed slowly while heated so as to perform the cauterizing operation.

4 Claims, 4 Drawing Figures in. I l I l y l,-

PATENTEU JUN 3 I975 23 FIG.2

' FIG.3

MICROCAUTERY DEVICE BACKGROUND OF THE INVENTION The present invention relates generally to a cauterizing device, and more specifically to a cauterizing device particularly adapted to be used following the performing of a biopsy operation wherein an internally disposed sample is obtained. The cauterizing device of the present invention is arranged for use following a biopsy procedure performed with that certain structure disclosed and claimed in US. Pat. No. 3,628,524, dated Dec. 21, 1971 and entitled Biopsy Needle," with the structure being adapted to be inserted in the opening formed by the biopsy needle stylet. The structure is provided with an elongated, at least moderately electrically conductive tubular metallic shaft, with a resistive closed tip end which is arranged to be electrically energized and heated to a cauterizing temperature. Heating is accomplished by material selection and by geometry, such as by utilization of resistive material with a significantly smaller cross-sectional thickness for this material than is utilized for the remaining portion of the tubular metallic shaft. The entire structure is arranged for insertion into a biopsy tract, energized while disposed within the tract, and removed with continued heating so as to cauterize the wound with the tip portion only as the device is being extracted.

Examples of biopsy needles which are in use by medical practitioners are those biopsy needle structures which are found in US. Pat. No. 3,598,108, for example.

Each of these biopsy needle structures contains a relatively elongated needle stylet which is used to form the tract or opening into the area to be examined, and the sample gathering device is thereafter inserted into the tract for its intended purpose. Normally, it is desirable to cauterize the wound, and the apparatus of the present invention is particularly adapted to perform this cauterizing operation in a progressive fashion, from the inner area of the wound outwardly to the surface as the cautery device is being withdrawn. In one operative embodiment, such as is illustrated in US. Pat. No. 3,598,108 entitled Biopsy Technique and Biopsy Device, the cautery device of the present invention may be inserted into the outer sleeve structure disclosed in U.S. Pat. No. 3,598,108, and with the heated tip portion projecting beyond the end of the sleeve, the composite assembly is withdrawn from the body of the patient so as to cauterize the tract upon withdrawal.

SUMMARY OF THE INVENTION Briefly, the improved cauterizing device of the present invention includes a gripping handle having an electrically conductive elongated tubular metallic shaft of small diameter extending outwardly from one end of the handle. The tubular shaft consists of a shank portion having a generally cylindrical tip portion with a closed tip secured to the shaft at the end thereof, with the tip portion being therefor disposed at the distal end of the shaft. A single electrically insulated, highly conductive electrical conductor is disposed within the confines of the shaft and extends from the handle to the closed tip where it is electrically coupled to the inner surface of the closed tip end. The tubular shaft portion may have a certain first cross-sectional thickness which is significantly greater than the cross-sectional thickness of the tip portion so as to avoid heating of the shaft. This arrangement provides for dissipation of more energy in the highly resistive tip portion disposed at the end of the shaft. A source of electrical energy is coupled across the electrical conductor and the proximate end of the tubular metallic shaft, thus forming a completed circuit through the resistive tip. The handle is arranged with switch means in order to appropriately energize the tip following insertion in the wound, and if desired, electrical power may be provided from a source within the handle, either battery power or normal l 15 volt AC power equipped with transformer means arranged to reduce the voltage to the desired level.

Therefore, it is a primary object of the present invention to provide an improved cauterizing device which is particularly adapted for the cauterizing of elongated unnatural openings of small diameter formed in a body from a needle stylet of a biopsy device.

It is yet a further object of the present invention to provide an improved cauterizing device for the cauterization of elongated unnatural openings or wounds of small diameter formed in a body, the cauterizing device including a gripping handle having a tubular metallic shaft of small diameter secured to one end thereof, and with means for providing an electrically resistive portion at the tip end of the shaft for the progressive cauterization of a wound from the interior to the outer surface opening.

Other and further objects of the present invention will become apparent to those skilled in the art upon a study of the following specification, appended claims, and accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a perspective view of a microcautery device prepared in accordance with the present invention;

FIG. 2 is a vertical sectional view taken through the diameter of the microcautery device shown in FIG. I, and illustrating the mechanism employed in the device; FIG. 3 is a detailed sectional view, partially broken away and on an enlarged scale, and illustrating the tip end portion of the improved microcautery device; and FIG. 4 is a vertical sectional view taken along the line and in the direction of the arrows 4-4 of FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENT The improved cauterizing device of the present invention generally designated 10 includes a gripping handle member 11 and an elongated tubular metallic shaft 12 extending from the end of the gripping handle 11. Tubular shaft 12, which is hollow, is of small diameter, normally not exceeding approximately 1.2 mm OD. The wall thickness is preferably about 4 mils to provide a desirable and useful device, however 9 mil wall tubing may be useful. The tubular shaft 12 is electrically conductive, preferably consisting of stainless steel such as 18-8 Stainless, or other suitable material for surgical use. The outer surface of the shaft 12 is preferably polished in order to render the structure readily sterilizable.

As is apparent in FIG. 2, shaft 12, being hollow, contains electrically insulated conductor 13 therewithin, (see FIG. 3) with an insulation layer 14 being disposed about the circumference therof. The tip end of shaft 12 is closed, such as is indicated in FIGS. 2 and 3, by tip member 15. Conductor 13 is electrically coupled to the inner surface of the closed tip end portion of tip adjacent the outer end 23a, as at 16. with the proximate end 18 of shaft 12 being coupled by electrical conductor 19 to a source of electrical energy, such as illustrated at 17, the completion of the electrical circuit is apparent.

With attention being directed to FIG. 3 of the drawing, it will be observed that the tip portion 15 includes a shank portion having a generally cylindrical form with the tip portion thereof being closed, as is apparent at 21. The shank portion of the tubular metallic shaft 12 has a certain first cross-sectional thickness of wall, such as in the range of about 4 mils to 9 mils, while the tip portion has a second cross-sectional thickness which is equal to or significantly less than the first cross-sectional wall thickness. For example, the tip portion may have a wall thickness of approximately 4 mils, which is approximately one-half of that of the remaining portion of the metallic shaft 12 when 9 mil tubing is being used. This reduction in wall thickness will render it possible for the resistive characteristics to enable the tip portion to be heated to a cauterizing temperature, such as normally between about 500 C. and l,000 C. while the cauterizing procedure is being performed.

It will be appreciated that a reduction in wall thickness is achieved by utilizing a common or continuous outer diameter, with the inner diameter being increased or decreased at the tip end in order to provide the appropriate control in wall thickness.

In order to provide a source of electrical power, battery element 17 is disposed within the interior of handle 11, with switch means having an attachment casing 15a, spring biased plunger member 15b, and button 156 being employed to control a flow of electrical power from battery source 17 to the tip 15. The battery source is preferably provided with adequate power capabilities so as to provide an I R loss sufficient to raise the temperature of tip 15 to a cauterizing level of between about 500 C. and l,0OO C. while internally disposed. Normal commercially available low internal impedance battery or other power sources will ordinarily be sufficient to generate sufficient power to permit certain surgically accepted stainless steel alloys to be employed, with stainless steel of sufficiently small diameter being useful, along with certain other alloys of commonly used cauterizing elements. Stainless steels such as seamless tubing of Type 18-8 or equivalents may be employed for the materials of construction. When selecting the materials of construction for the tip heater portion, a substance having significantly greater electrical resistance than utilized in the tubular shaft portion is needed. In this connection, therefore, a material such as Type 18-8 stainless steel may be employed. This material having a thickness of, for example, 4 mils may be utilized when a tubular shaft of a wall thickness of 9 mils is employed. The material is also suitable for use when the tubular shaft is formed with Nichrome tubing.

If desired, battery source 17 may be eliminated and a transformer power supply employed to permit the unit to be coupled directly to the l 15 A.C. power, and if such is the case, contacts 23 will continue to be employed to controllably interrupt the flow of electrical power to the tip 15. However, in this case, if normal volt A.C. power is employed, it may be desirable to utilize a pair of mating contacts, with one such contact being utilized with each of the two conductors. Such switch devices are, of course, normally commercially available.

As is indicated in FIG. 2 of the drawing, the individual leads extending from the source of power make contact with tip 15 through tubular metallic shaft 12 by means of the junction at 18, with the other line or main being coupled directly to tip 15 through conductor 13.

It will be appreciated that in use, a biopsy technique will normally employ the preparation of an elongated unnatural opening or tract of small diameter in the body, this opening being formed by a small diameter biopsy needle stylet. The tubular metallic shaft 12 is of comparable diameter, and is arranged to be inserted into the wound following the completion of the biopsy procedure. Following insertion, and while at the base of the wound or tract, power is supplied to the tip 15 and the heat generated through the PR losses will be adequate to cauterize the wound. The attendant then withdraws the needle from the wound slowly, as to permit continuous cauterization at the tip during the withdrawal of the device.

I claim:

1. Means for cauterizing elongated and unnatural openings of small diameter formed in a body with a small diameter biopsy needle stylet and comprising:

a. gripping handle means having an elongated hollow tubular metallic shaft of small diameter stainless steel extending from one end thereof;

b. said tubular metallic shaft consisting of a tubular shaft portion having a generally cylindrical tip portion with a closed hemispherical tip at the end thereof, said closed tip portion being disposed at the distal end of said tubular shaft portion opposite said handle means, said tubular shaft portion having a certain first electrical conductivity, and said tip portion having an electrical conductivity which is significantly less than that of said tubular shaft portion;

c. an electrical conductor disposed within the confines of said tubular metallic shaft and being arranged generally coaxially therewithin, means for coupling said electrical conductor and said tubular shaft portion to opposite poles of a source of electrical energy, said electrical conductor extending from said handle means to the inner surface of said closed tip end of said tubular metallic shaft and having a layer of electrical insulation disposed generally coaxially therearound, and being secured electrically to the inner wall of said closed tip portion adjacent the distal end thereof.

2. The cauterizing means as defined in claim 1 being particularly characterized in that said tubular shaft portion and closed tip portion have constant and common outer radii.

3. The cauterizing means as defined in claim 1 being particularly characterized in that the cross-sectional wall thickness of said tubular shaft portion is substantially equal to that of said closed tip portion.

4. The cauterizing means as defined in claim 1 being particularly characterized in that said tubular shaft portion and closed tip have a polished exterior surface along the entire extent thereof.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US2430666 *5 Nov 194511 Nov 1947Ralph Burger WalterElectric soldering iron
US3141087 *22 May 196114 Jul 1964Wall Mfg Company PBattery powered electric soldering iron
US3234356 *7 May 19638 Feb 1966Raymond F BabbElectrically heated medical implement
US3301258 *3 Oct 196331 Ene 1967Medtronic IncMethod and apparatus for treating varicose veins
US3526750 *2 Jun 19671 Sep 1970William J SiegelThermal tool
US3558854 *7 Nov 196826 Ene 1971Pace IncMiniature electric soldering iron
US3598108 *28 Feb 196910 Ago 1971Windschitl Harold EBiopsy technique and biopsy device
US3630192 *14 Jul 196928 Dic 1971Jamshidi KhosrowInstrument for internal organ biopsy
US3685518 *29 Jul 197022 Ago 1972Aesculap Werke AgSurgical instrument for high-frequency surgery
US3698394 *14 Jun 197117 Oct 1972Polak TeodorElectrically heated hypodermic needle
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US4034762 *4 Ago 197512 Jul 1977Electro Medical Systems, Inc.Vas cautery apparatus
US4242462 *16 Mar 197930 Dic 1980Thomas Richard EElectrically powered self-heating inoculating loop
US4269174 *6 Ago 197926 May 1981Medical Dynamics, Inc.Transcutaneous vasectomy apparatus and method
US4409993 *15 Jul 198118 Oct 1983Olympus Optical Co., Ltd.Endoscope apparatus
US4449528 *20 Jul 198122 May 1984University Of WashingtonFast pulse thermal cautery probe and method
US4527560 *27 Oct 19829 Jul 1985Masreliez Carl JMedical or dental probe with self-heating tip and methods for making
US4869248 *17 Abr 198726 Sep 1989Narula Onkar SMethod and apparatus for localized thermal ablation
US4992045 *28 Oct 198812 Feb 1991Dentsply Research & Development Corp.Battery powered condenser for root canals
US5043560 *29 Sep 198927 Ago 1991Masreliez C JohanTemperature control of a heated probe
US5163937 *25 Ene 199017 Nov 1992Transtech Scientific, Inc.Waterproof body for cautery devices
US5446262 *19 Abr 199429 Ago 1995Wahl Clipper CorporationSoldering iron and soldering iron tip with spaced heatable shell member
US5459298 *7 Dic 199417 Oct 1995Tschakaloff; AlexanderSurgical system temperature controlled electric heating tool
US5462552 *15 Jul 199431 Oct 1995Kiester; P. DouglasBone cement removal and apparatus
US5507744 *30 Abr 199316 Abr 1996Scimed Life Systems, Inc.Apparatus and method for sealing vascular punctures
US5810810 *6 Jun 199522 Sep 1998Scimed Life Systems, Inc.Apparatus and method for sealing vascular punctures
US6063085 *22 Oct 199316 May 2000Scimed Life Systems, Inc.Apparatus and method for sealing vascular punctures
US635503316 Jul 199912 Mar 2002Vivant MedicalTrack ablation device and methods of use
US65824266 Abr 200124 Jun 2003Vivant Medical, Inc.Needle kit and method for microwave ablation, track coagulation, and biopsy
US696258629 May 20028 Nov 2005Afx, Inc.Microwave ablation instrument with insertion probe
US69769865 Ene 200420 Dic 2005Afx, Inc.Electrode arrangement for use in a medical instrument
US70084416 Nov 20027 Mar 2006CardiodexBalloon method and apparatus for vascular closure following arterial catheterization
US703335218 Ene 200025 Abr 2006Afx, Inc.Flexible ablation instrument
US70524911 Abr 200230 May 2006Afx, Inc.Vacuum-assisted securing apparatus for a microwave ablation instrument
US70997173 Ene 200229 Ago 2006Afx Inc.Catheter having improved steering
US711512615 Abr 20023 Oct 2006Afx Inc.Directional microwave ablation instrument with off-set energy delivery portion
US7115127 *4 Feb 20033 Oct 2006Cardiodex, Ltd.Methods and apparatus for hemostasis following arterial catheterization
US715684114 Jul 20052 Ene 2007Afx, Inc.Electrode arrangement for use in a medical instrument
US71602921 May 20039 Ene 2007Vivant Medical, Inc.Needle kit and method for microwave ablation, track coagulation, and biopsy
US719242719 Feb 200320 Mar 2007Afx, Inc.Apparatus and method for assessing transmurality of a tissue ablation
US719736315 Oct 200227 Mar 2007Vivant Medical, Inc.Microwave antenna having a curved configuration
US722326610 Jul 200329 May 2007Cardiodex Ltd.Methods and apparatus for hemostasis following arterial catheterization
US722644612 Sep 20005 Jun 2007Dinesh ModySurgical microwave ablation assembly
US730113116 Feb 200627 Nov 2007Afx, Inc.Microwave ablation instrument with flexible antenna assembly and method
US730356024 Sep 20044 Dic 2007Afx, Inc.Method of positioning a medical instrument
US734639912 Nov 200418 Mar 2008Afx, Inc.Monopole tip for ablation catheter
US738762714 Sep 200517 Jun 2008Maquet Cardiovascular LlcVacuum-assisted securing apparatus for a microwave ablation instrument
US746804227 Abr 200423 Dic 2008Vivant Medical, Inc.Localization element with energized tip
US784610810 Dic 20087 Dic 2010Vivant Medical, Inc.Localization element with energized tip
US806892129 Sep 200629 Nov 2011Vivant Medical, Inc.Microwave antenna assembly and method of using the same
US820226925 May 200719 Jun 2012The Regents Of The Universtiy Of MichiganElectrical cautery device
US829288025 Nov 200823 Oct 2012Vivant Medical, Inc.Targeted cooling of deployable microwave antenna
US832880213 Mar 200911 Dic 2012Covidien AgCordless medical cauterization and cutting device
US836670615 Ago 20085 Feb 2013Cardiodex, Ltd.Systems and methods for puncture closure
US837207222 Nov 201112 Feb 2013Cardiodex Ltd.Methods and apparatus for hemostasis following arterial catheterization
US837705913 Mar 200919 Feb 2013Covidien AgCordless medical cauterization and cutting device
US843523621 Nov 20057 May 2013Cardiodex, Ltd.Techniques for heat-treating varicose veins
US849158113 Mar 200923 Jul 2013Covidien AgMethod for powering a surgical instrument
US869086818 Dic 20068 Abr 2014Covidien LpNeedle kit and method for microwave ablation, track coagulation, and biopsy
US875834227 Nov 200824 Jun 2014Covidien AgCordless power-assisted medical cauterization and cutting device
US88082825 Mar 200719 Ago 2014Covidien LpMicrowave antenna having a curved configuration
US8974932 *30 Oct 200910 Mar 2015Warsaw Orthopedic, Inc.Battery powered surgical tool with guide wire
US905009813 Nov 20089 Jun 2015Covidien AgCordless medical cauterization and cutting device
US9226792 *12 Jun 20135 Ene 2016Medtronic Advanced Energy LlcDebridement device and method
US933303226 Oct 201110 May 2016Covidien LpMicrowave antenna assembly and method of using the same
US936427027 Ene 201514 Jun 2016Warsaw Orthopedic, Inc.Surgical tool
US953282915 Feb 20123 Ene 2017Covidien AgCordless medical cauterization and cutting device
US20030055454 *6 Nov 200220 Mar 2003Cardiodex Ltd.Balloon method and apparatus for vascular closure following arterial catheterization
US20030195499 *15 Oct 200216 Oct 2003Mani PrakashMicrowave antenna having a curved configuration
US20040153054 *4 Feb 20035 Ago 2004Cardiodex Ltd.Methods and apparatus for hemostasis following arterial catheterization
US20040153060 *10 Jul 20035 Ago 2004Cardiodex Ltd.Methods and apparatus for hemostasis following arterial catheterization
US20050015080 *15 Jul 200420 Ene 2005Paul CicconeDevice for cutting or heating medical implants
US20060116672 *1 Nov 20051 Jun 2006Dany BerubeMicrowave ablation instrument with insertion probe
US20080294161 *25 May 200727 Nov 2008Wolf Jr StuartElectrical cautery device
US20090138003 *13 Nov 200828 May 2009Derek Dee DevilleCordless Medical Cauterization and Cutting Device
US20090240245 *13 Mar 200924 Sep 2009Derek Dee DevilleMethod for Powering a Surgical Instrument
US20090240246 *13 Mar 200924 Sep 2009Derek Dee DevilleCordless Medical Cauterization and Cutting Device
US20110064978 *30 Oct 200917 Mar 2011Warsaw Orthopedic, Inc.Surgical tool
US20110137305 *6 Dic 20099 Jun 2011Gregorio Hernandez ZendejasThermal neuroablator
US20130331833 *12 Jun 201312 Dic 2013Medtronic Advanced Energy LlcDebridement device and method
USRE40863 *22 Oct 199321 Jul 2009Boston Scientific Scimed, Inc.Apparatus and method for sealing vascular punctures
EP0720835A2 *15 Jun 199310 Jul 1996Medicon e.G.Surgical system
EP0720835A3 *15 Jun 199318 Sep 1996Medicon E GSurgical system
WO1994012110A1 *15 Nov 19939 Jun 1994Kiester P DouglasBone cement removal method and apparatus
WO2011117503A1 *4 Mar 201129 Sep 2011Nova ThermaDevice for delivering calories into human or animal tissue, vessel, or cavity
Clasificaciones
Clasificación de EE.UU.606/30, 219/233
Clasificación internacionalA61B18/08, A61B18/04
Clasificación cooperativaA61B18/082
Clasificación europeaA61B18/08B