[go: up one dir, main page]

US3698394A - Electrically heated hypodermic needle - Google Patents

Electrically heated hypodermic needle Download PDF

Info

Publication number
US3698394A
US3698394A US152549A US3698394DA US3698394A US 3698394 A US3698394 A US 3698394A US 152549 A US152549 A US 152549A US 3698394D A US3698394D A US 3698394DA US 3698394 A US3698394 A US 3698394A
Authority
US
United States
Prior art keywords
needle
conductor
surgical instrument
resistance element
instrument defined
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US152549A
Inventor
William S Piper
Teodor Polak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3698394A publication Critical patent/US3698394A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A61B18/08—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by means of electrically-heated probes
    • A61B18/082—Probes or electrodes therefor

Definitions

  • ABSTRACT A surgical instrument is provided in the form of a hypodermic needle, the tip of the needle being heated s2 U.S.Cl .Q ..128/303.1, 128/404 by Passing an electric current through a resistance [51 lnt.C1. ..A6lb 17/36, A6ln 3/06 wire Within the needle adjacent its The needle has 581 Field of Search ..128/303.l, 303.18, 404 particular utility for medical p p and is used, r
  • ELECTRICALLY HEATED HYPODERMIC NEEDLE BACKGROUND OF THE INVENTION A medical need often arises for the destruction of small veins, and this is achieved simply and effectively by the surgical instrument of the invention.
  • a needle is inserted percutaneously into a vein, and electric current is passed through the needle at a rate sufficient to heat its tip. This results in immediate destruction of the vein and subsequent disappearance thereof.
  • FIG. 1 is a perspective view, on an enlarged scale, of a surgical instrument in the form of a hypodermic needle constructed in accordance with the invention
  • FIG. 2 is a side section taken along line 2-2 of FIG. 1;
  • FIG. 3 is a side section, like FIG. 2, of a modified embodiment of the invention.
  • the surgical instrument illustrated in the FIGS. 1 and 2 of the drawing includes a usual hollow hypodermic needle which may, for example, be a No. 27 needle having a 16 mil outer diameter and a 9 mil inner diameter, the needle being composed, for example, of surgical steel.
  • a wire 12 of low resistance and high electrical conductivity is positioned coaxially within the hypodermic needle 10, the conductor 12 being insulated from the needle by any appropriate electrical insulation designated 14.
  • the conductor 12 may be composed, for example, of copper wire of 4 mil diameter.
  • the copper wire 12 terminates at a point displaced from the tip of the needle 10.
  • a high resistance wire 16 is positioned within the needle in axial alignment with the conductor 12, the high resistance wire 16 extending from the end of the conductor 12 to a point adjacent the tip of the needle.
  • the high resistance wire 16 may have a diameter, for example, of 3.5 mils, and it may be composed of a nickel chrome alloy.
  • An appropriate end fitting may be provided at the right hand end of the needle in FIGS. 1 and 2.
  • This fitting may have any appropriate known configuration. The fitting is not shown since it does not have any significance to the present invention.
  • the resistance element 16 is bonded to the end of the conductor 12 by a silver braze, for example, or by other suitable means serving as an electrical and mechanical connection between the high resistance wire and the conductor 12.
  • the other end of the high resistance wire 16 is bonded to the tip of the needle by, for example, similar means.
  • the electrical and mechanical connection between the high resistance wire 16 and the conductor 12 designated 18, and the electrical and mechanical connection between the other end of the resistance element 16 and the tip of the needle 10 is designated 20.
  • the right-hand end of the conductor 12 and of the needle 10 may be connected to an appropriate source of electric power, either direct current or alternating current, and designated 22. Then, when electric power is applied from the source 22, the resulting electric current flows through the conductor 12 and through resistance element 16, and back to the needle 10, causing the resistance element 16 to become heated, thereby o heating the tip of the needle l0.
  • an appropriate source of electric power either direct current or alternating current
  • the hypodermic needle is inserted percutaneously into the vein of the patient, and the tip is internally heated by passing the aforesaid alternating or direct current through the high resistance wire 16 inside the needle. All or part of the needle can be heated depending on the length and place of the wire 16.
  • the power source 22 may be controllable, so as to control the temperature of the heated portion of the needle.
  • the needle can be constructed as shown in FIG. 3 in which a high resistance wire core 14a extends the length of the needle.
  • the high resistance wire core is coated (by means of electroplating or otherwise) with a low resistance metal 12a, such as copper or silver, except for the portion of the needle where heat is desired.
  • the high resistance wire core 14a can be manufactured with a continuous coating which can be selectively removed prior to assembly in the needle by chemically dissolving it or by abrasion.
  • the surgical instrument of the invention has particular utility whenever it is desired to destroy small blood vessels, veins and tissue.
  • a surgical instrument comprising: a hollow hypodermic needle having a pointed tip and composed of electrically conductive material; an elongated electrical conductor extending in coaxial relationship within said needle;'electrically insulating means interposed between said conductor and said needle for insulating said conductor from said needle; an electrical resistance element mounted within said needle; and means electrically connecting said resistance element to said needle and to said conductor, so that electric current passed through said needle and through said conductor passes through said electrical resistance element to heat a portion of said needle.
  • said elongated electrical conductor comprises a high resistance wire coated with a low resistance metal except for that portion of the needle where heat is desired.

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Otolaryngology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

A surgical instrument is provided in the form of a hypodermic needle, the tip of the needle being heated by passing an electric current through a resistance wire within the needle adjacent its tip. The needle has particular utility for medical purposes, and is used, for example, to destroy blood vessels or tissue.

Description

154] ELECTRICALLY HEATED HYPODERMIC NEEDLE [72] Inventors: William S. Piper, 555 Greencraig Road; Teodor Polak, 443 Greencraig Road, both of Los Angeles,
Calif. 90049 221 Filed: June 14, 1971 [21] Appl. No.: 152,549
[ Oct. 17, 1972 1,355,932 10/1920 Walter ..l28/303.l 1,913,595 6/1933 Hyman et a1. ..l28/303.l8 2,516,882 8/1950 Kalom ..l28/303.l8 X 3,301,258 1/1967 Werner et a1 l 28/303.l
Primary Examiner-Channing L. Pace [5 7] ABSTRACT A surgical instrument is provided in the form of a hypodermic needle, the tip of the needle being heated s2 U.S.Cl .Q ..128/303.1, 128/404 by Passing an electric current through a resistance [51 lnt.C1. ..A6lb 17/36, A6ln 3/06 wire Within the needle adjacent its The needle has 581 Field of Search ..128/303.l, 303.18, 404 particular utility for medical p p and is used, r
example, to destroy blood vessels or tissue. [56] References Cited 7 Claims, 3 Drawing Figures UNITED STATES PATENTS .w .7 r
1,234,570 7/1917 Rink ..128/303.1 ux
fig'ggj gz y aderm/k/Veel/e Jamar/f0 z/ (f4 2 l a: 21:4 ow ear/r 4m? f y/d ,9 i farm/mm? W? W Care 50am? 0/} PATENTEDUCI 17 1972 3.698.394
@ZZZZQZ/ Wa/ewmt/VaeJ/e ammwa:
ELECTRICALLY HEATED HYPODERMIC NEEDLE BACKGROUND OF THE INVENTION A medical need often arises for the destruction of small veins, and this is achieved simply and effectively by the surgical instrument of the invention. In the practice of the invention, a needle is inserted percutaneously into a vein, and electric current is passed through the needle at a rate sufficient to heat its tip. This results in immediate destruction of the vein and subsequent disappearance thereof.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a perspective view, on an enlarged scale, of a surgical instrument in the form of a hypodermic needle constructed in accordance with the invention;
FIG. 2 is a side section taken along line 2-2 of FIG. 1; and
FIG. 3 is a side section, like FIG. 2, of a modified embodiment of the invention.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENT The surgical instrument illustrated in the FIGS. 1 and 2 of the drawing includes a usual hollow hypodermic needle which may, for example, be a No. 27 needle having a 16 mil outer diameter and a 9 mil inner diameter, the needle being composed, for example, of surgical steel. A wire 12 of low resistance and high electrical conductivity is positioned coaxially within the hypodermic needle 10, the conductor 12 being insulated from the needle by any appropriate electrical insulation designated 14.
The conductor 12 may be composed, for example, of copper wire of 4 mil diameter. The copper wire 12 terminates at a point displaced from the tip of the needle 10. A high resistance wire 16 is positioned within the needle in axial alignment with the conductor 12, the high resistance wire 16 extending from the end of the conductor 12 to a point adjacent the tip of the needle. The high resistance wire 16 may have a diameter, for example, of 3.5 mils, and it may be composed of a nickel chrome alloy.
An appropriate end fitting may be provided at the right hand end of the needle in FIGS. 1 and 2. This fitting may have any appropriate known configuration. The fitting is not shown since it does not have any significance to the present invention.
The resistance element 16 is bonded to the end of the conductor 12 by a silver braze, for example, or by other suitable means serving as an electrical and mechanical connection between the high resistance wire and the conductor 12. The other end of the high resistance wire 16 is bonded to the tip of the needle by, for example, similar means. The electrical and mechanical connection between the high resistance wire 16 and the conductor 12 designated 18, and the electrical and mechanical connection between the other end of the resistance element 16 and the tip of the needle 10 is designated 20.
The insulation 14, as shown, extends around the high resistance wire 16, as well as around the conductor 12, so that both are insulated from the needle 10, except for the connection between the end of the high resistance wire 16 and the needle 10, as designated 20.
The right-hand end of the conductor 12 and of the needle 10 may be connected to an appropriate source of electric power, either direct current or alternating current, and designated 22. Then, when electric power is applied from the source 22, the resulting electric current flows through the conductor 12 and through resistance element 16, and back to the needle 10, causing the resistance element 16 to become heated, thereby o heating the tip of the needle l0.
In the practice of the invention, the hypodermic needle is inserted percutaneously into the vein of the patient, and the tip is internally heated by passing the aforesaid alternating or direct current through the high resistance wire 16 inside the needle. All or part of the needle can be heated depending on the length and place of the wire 16. The power source 22 may be controllable, so as to control the temperature of the heated portion of the needle.
Alternatively, the needle can be constructed as shown in FIG. 3 in which a high resistance wire core 14a extends the length of the needle. The high resistance wire core is coated (by means of electroplating or otherwise) with a low resistance metal 12a, such as copper or silver, except for the portion of the needle where heat is desired. The high resistance wire core 14a can be manufactured with a continuous coating which can be selectively removed prior to assembly in the needle by chemically dissolving it or by abrasion.
As mentioned above, the surgical instrument of the invention has particular utility whenever it is desired to destroy small blood vessels, veins and tissue.
It will also be appreciated that although a particular embodiment of the invention has been shown and described, modifications may be made, and it is intended in the following claims to cover all modifications which come within the scope of the invention.
What is claimed is:
l. A surgical instrument comprising: a hollow hypodermic needle having a pointed tip and composed of electrically conductive material; an elongated electrical conductor extending in coaxial relationship within said needle;'electrically insulating means interposed between said conductor and said needle for insulating said conductor from said needle; an electrical resistance element mounted within said needle; and means electrically connecting said resistance element to said needle and to said conductor, so that electric current passed through said needle and through said conductor passes through said electrical resistance element to heat a portion of said needle.
2. The surgical instrument defined in claim 1, in which said resistance element is in the form of a wire positioned in axial alignment with said conductor adjacent the tip of said needle.
3. The surgical instrument defined in claim 1, in which said needle is composed of surgical steel.
4. The surgical instrument defined in claim 1, in which said elongated electrical conductor comprises a copper wire.
5. The surgical instrument defined in claim 1, in which said electrical resistance element has an elongated configuration and is disposed within said needle in axial alignment with said conductor.
6. The surgical instrument defined in claim- 1, in which said resistance metal is composed of a nickel chrome alloy.
7. The surgical instrument defined in claim 1, in
which said elongated electrical conductor comprises a high resistance wire coated with a low resistance metal except for that portion of the needle where heat is desired. 5

Claims (7)

1. A surgical instrument comprising: a hollow hypodermic needle having a pointed tip and composed of electrically conductive material; an elongated electrical conductor extending in coaxial relationship within said needle; electrically insulating means interposed between said conductor and said needle for insulating said conductor from said needle; an electrical resistance element mounted within said needle; and means electrically connecting said resistance element to said needle and to said conductor, so that electric current passed through said needle and through said conductor passes through said electrical resistance element to heat a portion of said needle.
2. The surgical instrument defined in claim 1, in which said resistance element is in the form of a wire positioned in axial alignment with said conductor adjacent the tip of said needle.
3. The surgical instrument defined in claim 1, in which said needle is composed of surgical steel.
4. The surgical instrument defined in claim 1, in which said elongated electrical conductor comprises a copper wire.
5. The surgical instrument defined in claim 1, in which said electrical resistance element has an elongated configuration and is disposed within said needle in axial alignment with said conductor.
6. The surgical instrument defined in claim 1, in which said resistance metal is composed of a nickel chrome alloy.
7. The surgical instrument defined in claim 1, in which said elongated electrical conductor comprises a high resistance wire coated with a low resistance metal except for that portion of the needle where heat is desired.
US152549A 1971-06-14 1971-06-14 Electrically heated hypodermic needle Expired - Lifetime US3698394A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15254971A 1971-06-14 1971-06-14

Publications (1)

Publication Number Publication Date
US3698394A true US3698394A (en) 1972-10-17

Family

ID=22543404

Family Applications (1)

Application Number Title Priority Date Filing Date
US152549A Expired - Lifetime US3698394A (en) 1971-06-14 1971-06-14 Electrically heated hypodermic needle

Country Status (1)

Country Link
US (1) US3698394A (en)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875944A (en) * 1974-02-04 1975-04-08 Philip M Toyama Heated acupuncture needle and method of using the same
US3886944A (en) * 1973-11-19 1975-06-03 Khosrow Jamshidi Microcautery device
US4142529A (en) * 1977-06-20 1979-03-06 Bio-Tronics, Inc. Process and device for the therapeutic treatment of hemorrhoids
US4227535A (en) * 1979-04-02 1980-10-14 Bio-Tronics, Inc. Proctologic device for the therapeutic treatment of hemorrhoids
US4269174A (en) * 1979-08-06 1981-05-26 Medical Dynamics, Inc. Transcutaneous vasectomy apparatus and method
US4411266A (en) * 1980-09-24 1983-10-25 Cosman Eric R Thermocouple radio frequency lesion electrode
EP0102538A1 (en) * 1982-08-06 1984-03-14 Sterimed Gesellschaft für medizinischen Bedarf mbH Device for puncture and catheterisation for human or animal bodies
US4527560A (en) * 1982-10-27 1985-07-09 Masreliez Carl J Medical or dental probe with self-heating tip and methods for making
US4672962A (en) * 1983-09-28 1987-06-16 Cordis Corporation Plaque softening method
US4682596A (en) * 1984-05-22 1987-07-28 Cordis Corporation Electrosurgical catheter and method for vascular applications
US4748979A (en) * 1985-10-07 1988-06-07 Cordis Corporation Plaque resolving device
US4947842A (en) * 1988-09-22 1990-08-14 Medical Engineering And Development Institute, Inc. Method and apparatus for treating tissue with first and second modalities
US4955883A (en) * 1988-08-29 1990-09-11 Diversatronics Glaucoma needle with a thermal heat band
US4961422A (en) * 1983-01-21 1990-10-09 Marchosky J Alexander Method and apparatus for volumetric interstitial conductive hyperthermia
US4992045A (en) * 1987-04-01 1991-02-12 Dentsply Research & Development Corp. Battery powered condenser for root canals
US5043560A (en) * 1989-09-29 1991-08-27 Masreliez C Johan Temperature control of a heated probe
USRE33925E (en) * 1984-05-22 1992-05-12 Cordis Corporation Electrosurgical catheter aned method for vascular applications
US5170788A (en) * 1991-04-24 1992-12-15 Vickers Plc Needle electrode and method of assembly thereof
WO1993006784A1 (en) * 1991-10-02 1993-04-15 Wisap Gesellschaft für wissenschaftlichen Apparatebau mbH Coagulation probe
US5979453A (en) * 1995-11-09 1999-11-09 Femrx, Inc. Needle myolysis system for uterine fibriods
US6283935B1 (en) 1998-09-30 2001-09-04 Hearten Medical Ultrasonic device for providing reversible tissue damage to heart muscle
US6312426B1 (en) 1997-05-30 2001-11-06 Sherwood Services Ag Method and system for performing plate type radiofrequency ablation
US20040039247A1 (en) * 2002-08-23 2004-02-26 Nash John Edward Catheters
US20050143619A1 (en) * 2003-12-05 2005-06-30 William A. Cook Australia Pty. Ltd. Heated ovum pick up needle
US20070163106A1 (en) * 2004-05-18 2007-07-19 Excel-Tech Ltd. Needle having multiple electrodes
US20090260852A1 (en) * 2008-02-29 2009-10-22 Fort Wayne Metals Research Products Corporation Alternating core composite wire
US20100049031A1 (en) * 2008-08-20 2010-02-25 Ionix Medical, Inc. Non-Thermal Ablation System for Treating BPH and Other Growths
US20110137305A1 (en) * 2009-12-06 2011-06-09 Gregorio Hernandez Zendejas Thermal neuroablator
WO2011117503A1 (en) * 2010-03-23 2011-09-29 Nova Therma Device for delivering calories into human or animal tissue, vessel, or cavity
WO2012151253A1 (en) * 2011-05-02 2012-11-08 Insight Surgical Instruments Llc Minimally invasive surgical applicator
US8600494B2 (en) 1999-04-09 2013-12-03 Ionix Medical Inc. Method and device for treating abnormal tissue growth with electrical therapy
EP2978279A4 (en) * 2013-03-22 2016-12-21 Yoshinogawa Electric Wire & Cable Co Ltd Electric heater and method for manufacturing electric heater
RU202799U1 (en) * 2020-10-13 2021-03-09 Игорь Сергеевич Ковалев Device for removing cholesterol plaques from blood vessels
US11224474B2 (en) 2018-02-28 2022-01-18 Prostacare Pty Ltd System for managing high impedance changes in a non-thermal ablation system for BPH
US11324416B2 (en) 2016-04-15 2022-05-10 Oxford University Innovation Limited Needle probe, apparatus for sensing compositional information, medical drain, method of measuring a thermal property, and method of sensing compositional information
US11457975B2 (en) 2017-11-27 2022-10-04 Prostacare Pty Ltd Apparatus and a method for the treatment of a prostatic disease

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1234570A (en) * 1917-01-31 1917-07-24 Sharp & Smith Electric cauterizer.
US1355932A (en) * 1919-07-05 1920-10-19 Allen J Walter Combined sound and heating element
US1913595A (en) * 1930-03-12 1933-06-13 Hyman Charles Henry Artificial pace maker for the heart
US2516882A (en) * 1948-01-22 1950-08-01 Kalom Lawrence Electrical probe
US3301258A (en) * 1963-10-03 1967-01-31 Medtronic Inc Method and apparatus for treating varicose veins

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1234570A (en) * 1917-01-31 1917-07-24 Sharp & Smith Electric cauterizer.
US1355932A (en) * 1919-07-05 1920-10-19 Allen J Walter Combined sound and heating element
US1913595A (en) * 1930-03-12 1933-06-13 Hyman Charles Henry Artificial pace maker for the heart
US2516882A (en) * 1948-01-22 1950-08-01 Kalom Lawrence Electrical probe
US3301258A (en) * 1963-10-03 1967-01-31 Medtronic Inc Method and apparatus for treating varicose veins

Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886944A (en) * 1973-11-19 1975-06-03 Khosrow Jamshidi Microcautery device
US3875944A (en) * 1974-02-04 1975-04-08 Philip M Toyama Heated acupuncture needle and method of using the same
US4142529A (en) * 1977-06-20 1979-03-06 Bio-Tronics, Inc. Process and device for the therapeutic treatment of hemorrhoids
US4227535A (en) * 1979-04-02 1980-10-14 Bio-Tronics, Inc. Proctologic device for the therapeutic treatment of hemorrhoids
WO1980002108A1 (en) * 1979-04-02 1980-10-16 Biotronics Inc Proctologic device for the therapeutic treatment of hemorrhoids
US4269174A (en) * 1979-08-06 1981-05-26 Medical Dynamics, Inc. Transcutaneous vasectomy apparatus and method
US4411266A (en) * 1980-09-24 1983-10-25 Cosman Eric R Thermocouple radio frequency lesion electrode
EP0102538A1 (en) * 1982-08-06 1984-03-14 Sterimed Gesellschaft für medizinischen Bedarf mbH Device for puncture and catheterisation for human or animal bodies
US4527560A (en) * 1982-10-27 1985-07-09 Masreliez Carl J Medical or dental probe with self-heating tip and methods for making
US4961422A (en) * 1983-01-21 1990-10-09 Marchosky J Alexander Method and apparatus for volumetric interstitial conductive hyperthermia
US5197466A (en) * 1983-01-21 1993-03-30 Med Institute Inc. Method and apparatus for volumetric interstitial conductive hyperthermia
US4672962A (en) * 1983-09-28 1987-06-16 Cordis Corporation Plaque softening method
US4682596A (en) * 1984-05-22 1987-07-28 Cordis Corporation Electrosurgical catheter and method for vascular applications
USRE33925E (en) * 1984-05-22 1992-05-12 Cordis Corporation Electrosurgical catheter aned method for vascular applications
US4748979A (en) * 1985-10-07 1988-06-07 Cordis Corporation Plaque resolving device
US4992045A (en) * 1987-04-01 1991-02-12 Dentsply Research & Development Corp. Battery powered condenser for root canals
US4955883A (en) * 1988-08-29 1990-09-11 Diversatronics Glaucoma needle with a thermal heat band
US4947842A (en) * 1988-09-22 1990-08-14 Medical Engineering And Development Institute, Inc. Method and apparatus for treating tissue with first and second modalities
US5043560A (en) * 1989-09-29 1991-08-27 Masreliez C Johan Temperature control of a heated probe
US5170788A (en) * 1991-04-24 1992-12-15 Vickers Plc Needle electrode and method of assembly thereof
WO1993006784A1 (en) * 1991-10-02 1993-04-15 Wisap Gesellschaft für wissenschaftlichen Apparatebau mbH Coagulation probe
US5979453A (en) * 1995-11-09 1999-11-09 Femrx, Inc. Needle myolysis system for uterine fibriods
US6312426B1 (en) 1997-05-30 2001-11-06 Sherwood Services Ag Method and system for performing plate type radiofrequency ablation
US6283935B1 (en) 1998-09-30 2001-09-04 Hearten Medical Ultrasonic device for providing reversible tissue damage to heart muscle
US6719770B2 (en) 1998-09-30 2004-04-13 Tony R. Brown Ultrasonic device for providing reversible tissue damage to heart muscle
US8600494B2 (en) 1999-04-09 2013-12-03 Ionix Medical Inc. Method and device for treating abnormal tissue growth with electrical therapy
US20040039247A1 (en) * 2002-08-23 2004-02-26 Nash John Edward Catheters
EP1393690A2 (en) * 2002-08-23 2004-03-03 Smiths Group plc Catheters
US7351199B2 (en) 2002-08-23 2008-04-01 Smiths Group Plc Catheters
EP1393690A3 (en) * 2002-08-23 2005-12-07 Smiths Group plc Catheters
US20050143619A1 (en) * 2003-12-05 2005-06-30 William A. Cook Australia Pty. Ltd. Heated ovum pick up needle
US7384391B2 (en) * 2003-12-05 2008-06-10 William A. Cook Australia Pty. Ltd. Heated ovum pick up needle
US20070163106A1 (en) * 2004-05-18 2007-07-19 Excel-Tech Ltd. Needle having multiple electrodes
US7989703B2 (en) 2008-02-29 2011-08-02 Fort Wayne Metals Research Products Corporation Alternating core composite wire
US20090260852A1 (en) * 2008-02-29 2009-10-22 Fort Wayne Metals Research Products Corporation Alternating core composite wire
US20100049188A1 (en) * 2008-08-20 2010-02-25 Ionix Medical, Inc. Non-Thermal Ablation System for Treating Tissue
US9211155B2 (en) 2008-08-20 2015-12-15 Prostacare Pty Ltd. Non-thermal ablation system for treating BPH and other growths
US10085800B2 (en) 2008-08-20 2018-10-02 Prostacare Pty Ltd Non-thermal ablation system for treating tissue
US10575899B2 (en) 2008-08-20 2020-03-03 Prostacare Pty Ltd Non-thermal ablation system for treating BPH and other growths
US9597145B2 (en) 2008-08-20 2017-03-21 Prostacare Pty Ltd Non-thermal ablation system for treating tissue
US10736689B2 (en) * 2008-08-20 2020-08-11 Prostacare Pty Ltd Low-corrosion electrode for treating tissue
US10939957B2 (en) 2008-08-20 2021-03-09 Prostacare Pty Ltd Non-thermal ablation system for treating tissue
US20100049192A1 (en) * 2008-08-20 2010-02-25 Ionix Medical, Inc. Catheter for Treating Tissue with Non-Thermal Ablation
US20100049031A1 (en) * 2008-08-20 2010-02-25 Ionix Medical, Inc. Non-Thermal Ablation System for Treating BPH and Other Growths
US10842555B2 (en) 2008-08-20 2020-11-24 Prostacare Pty Ltd Catheter for treating tissue with non-thermal ablation
US20110106072A1 (en) * 2008-08-20 2011-05-05 Ionix Medical, Inc. Low-Corrosion Electrode for Treating Tissue
US20110137305A1 (en) * 2009-12-06 2011-06-09 Gregorio Hernandez Zendejas Thermal neuroablator
FR2957777A1 (en) * 2010-03-23 2011-09-30 Nova Therma DEVICE FOR ADMINISTERING CALORIES IN HUMAN OR ANIMAL TISSUE, VESSEL OR CAVITY
WO2011117503A1 (en) * 2010-03-23 2011-09-29 Nova Therma Device for delivering calories into human or animal tissue, vessel, or cavity
US8603097B2 (en) 2011-05-02 2013-12-10 Insight Surgical Instruments, Llc Minimally invasive surgical applicator
US8801723B2 (en) 2011-05-02 2014-08-12 Insight Surgical Instruments, Llc Minimally invasive surgical applicator
WO2012151253A1 (en) * 2011-05-02 2012-11-08 Insight Surgical Instruments Llc Minimally invasive surgical applicator
US10194489B2 (en) 2013-03-22 2019-01-29 Yoshinogawa Electric Wire & Cable Co., Ltd. Electric heater and method for manufacturing electric heater
EP2978279A4 (en) * 2013-03-22 2016-12-21 Yoshinogawa Electric Wire & Cable Co Ltd Electric heater and method for manufacturing electric heater
US11324416B2 (en) 2016-04-15 2022-05-10 Oxford University Innovation Limited Needle probe, apparatus for sensing compositional information, medical drain, method of measuring a thermal property, and method of sensing compositional information
US11457975B2 (en) 2017-11-27 2022-10-04 Prostacare Pty Ltd Apparatus and a method for the treatment of a prostatic disease
US11224474B2 (en) 2018-02-28 2022-01-18 Prostacare Pty Ltd System for managing high impedance changes in a non-thermal ablation system for BPH
RU202799U1 (en) * 2020-10-13 2021-03-09 Игорь Сергеевич Ковалев Device for removing cholesterol plaques from blood vessels

Similar Documents

Publication Publication Date Title
US3698394A (en) Electrically heated hypodermic needle
US12064169B2 (en) Catheter with irrigated tip electrode with porous substrate and high density surface micro-electrodes
US3886944A (en) Microcautery device
US4896671A (en) Catheter with contoured ablation electrode
US2050904A (en) Electric hemostat or cautery
US5908385A (en) Apparatus for mapping electrical activity in a body and treating tissue
KR101455746B1 (en) Catheter for measuring electric potential
US3359974A (en) Device for the thermal determination of cardiac volumetric performance
US3416533A (en) Conductive catheter
US3416534A (en) Body organ electrode
US6228084B1 (en) Electro-surgical forceps having recessed irrigation channel
KR970000269A (en) Improvement of catheter for use in the vascular system
JP2005520596A (en) Catheter with flexible electrode to be cooled
JPS63279833A (en) Method and apparatus for removing local heat
TW201106915A (en) Guide wire and system of ablation catheter with balloon
US2126257A (en) Electromedical instrument
US4041933A (en) Electrode for polarographic measurements in physiological media
CN113693717B (en) Radio frequency ablation catheter capable of being used for radial artery access
CN214259995U (en) Real-time temperature control heating and temperature measurement in-vivo heating needle
Rakhmadi et al. Comparison of radio frequency current and microwave energy for transcatheter renal denervation
US3670736A (en) Therapeutic instrumentation electrode
CN108309437B (en) Radio frequency ablation needle
JPH0228985B2 (en)
FR2345994A1 (en) Needle for use in acupuncture - has length inserted under skin made from different metals and shank portion contacting fine conductive wire
SU1722508A1 (en) Esophageal wire electrode