WO2003077782A1 - Catheter destine a un traitement de l'hyperthermie induit par une frequence radio - Google Patents

Catheter destine a un traitement de l'hyperthermie induit par une frequence radio Download PDF

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Publication number
WO2003077782A1
WO2003077782A1 PCT/IT2003/000028 IT0300028W WO03077782A1 WO 2003077782 A1 WO2003077782 A1 WO 2003077782A1 IT 0300028 W IT0300028 W IT 0300028W WO 03077782 A1 WO03077782 A1 WO 03077782A1
Authority
WO
WIPO (PCT)
Prior art keywords
catheter
electrode
radio frequency
active electrode
treatment
Prior art date
Application number
PCT/IT2003/000028
Other languages
English (en)
Other versions
WO2003077782A8 (fr
Inventor
Andrea Venturelli
Original Assignee
Fogazzi Di Venturelli Andrea & C. S.N.C.
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 Fogazzi Di Venturelli Andrea & C. S.N.C. filed Critical Fogazzi Di Venturelli Andrea & C. S.N.C.
Priority to AU2003208604A priority Critical patent/AU2003208604A1/en
Publication of WO2003077782A1 publication Critical patent/WO2003077782A1/fr
Publication of WO2003077782A8 publication Critical patent/WO2003077782A8/fr

Links

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
    • A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00084—Temperature
    • A61B2017/00088—Temperature using thermistors
    • 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
    • A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
    • A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
    • 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
    • A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
    • A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
    • A61B2018/00029—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids open
    • 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
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00791—Temperature
    • A61B2018/00815—Temperature measured by a thermistor

Definitions

  • This invention concerns in general devices for therapeutic and surgical use in the treatment of tumours and other affections using hyperthermia, that is to say thermal ablation, induced by radio frequency, and refers in particular to a catheter with an electrode for this use.
  • a metal plaque as an active electrode positioned along a tubular body of the catheter in close proximity to a possible distal anchoring balloon.
  • the plaque can be copper, steel or some other metal, it encircles the tubular body it is attached to and in order to avoid too high treatment temperatures induced by radio frequency, which could cause burns, it is usually cooled. For this reason the plaque has to be structured so as to allow a cooling fluid to circulate in it, usually water, fed from a suitable source.
  • One object of this invention is provide a catheter with an active electrode for radio frequency treatment made so as not to require cooling while ensuring efficiency and functionality.
  • Another object of the invention is to provide an active electrode for catheters for therapeutic or surgical treatment using hyperthermia which is simple and not costly to make and which has improved characteristics as regards to smoothness due to its inconsequential tendency to adhere to
  • Fig.1 is a side of a portion of the catheter complete with active
  • Fig. 2 is an enlarged longitudinal section of the electrode
  • Fig.3 is a cross-section of the electrode in direction of the arrows A- A in Fig. 2.
  • the catheter comprises a body 10 which
  • the body of the catheter 10, in one distal part, houses an active
  • the active electrode 1 1 is an integral part of, or attached to, the body of the catheter 10 and it is connected in the usual way to a radio frequency generator by a radio frequency lead extending in said body towards the proximal end of the same.
  • Such an electrode 11 is advantageously made up of a substantially cylindrical element 12 terminating or not terminating in a conically tapered end 13 which may or may not be attached to an inflatable anchoring balloon - not shown. Furthermore the end of the electrode may be inserted to form a metal point of its own.
  • the element 12 making up the electrode 11 is advantageously made of conductive ceramic or graphite, materials which warrant the functional efficiency of the electrode in treatments using hyperthermia induced by radio frequency even without the need for it to be cooled by a fluid.
  • the material making up the electrode can also contain additives suitable for reducing adhesion to tissue it comes into contact with and at the same time improving its smoothness when the catheter id introduced unto the body through vessels or natural ducts.
  • the body of the catheter 10 and the active electrode 11 have at least one longitudinal duct 14 to receive the usual guide wire or arbour 15 which extends beyond the other end of the electrode, that is to say its tapered end.
  • the catheter body also houses a thermistor needle 16 which can be moved longitudinally to extend and to protrude, and be retracted, from one side of said body in close proximity to the electrode.
  • the thermistor needle contains, as is own, the leads of a thermocouple for measuring the temperature around the electrode during heating and use of the latter in the treatment to be carried out.
  • the catheter described above may also receive other means for other functions without this departing from the field of the invention, as long as the electrode has the aspects and is realised with the means referred to above.

Landscapes

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

Abstract

L'invention concerne une électrode active destinée au traitement de tumeurs ou autres affections utilisant une hyperthermie induite par fréquence radio. L'électrode active (11) est réalisée dans un matériau tel que de la céramique ou du graphite conducteur (12), placé dans une extrémité distale d'un corps cathéter. L'électrode est connectée à un générateur de fréquence radio et a au moins un conduit longitudinal continuant dans un conduit correspondant dans le corps du cathéter pour permettre le passage d'un fil-guide ou arbre.
PCT/IT2003/000028 2002-03-20 2003-01-27 Catheter destine a un traitement de l'hyperthermie induit par une frequence radio WO2003077782A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003208604A AU2003208604A1 (en) 2002-03-20 2003-01-27 Catheter for radio frequency induced hyperthermia treatment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS02U000040 2002-03-20
ITBS20020040 ITBS20020040U1 (it) 2002-03-20 2002-03-20 Catetere con un elettrodo per i trattamento di tumori mediante ipertermia indotta da radiofrequenza

Publications (2)

Publication Number Publication Date
WO2003077782A1 true WO2003077782A1 (fr) 2003-09-25
WO2003077782A8 WO2003077782A8 (fr) 2004-01-08

Family

ID=27840306

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2003/000028 WO2003077782A1 (fr) 2002-03-20 2003-01-27 Catheter destine a un traitement de l'hyperthermie induit par une frequence radio

Country Status (3)

Country Link
AU (1) AU2003208604A1 (fr)
IT (1) ITBS20020040U1 (fr)
WO (1) WO2003077782A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115812A2 (fr) * 1983-01-28 1984-08-15 C. Conradty Nürnberg GmbH & Co. KG Electrode conductrice de courant pour fours métallurgiques
US5531677A (en) * 1992-08-12 1996-07-02 Vidamed, Inc. Steerable medical probe with stylets
US6096035A (en) * 1995-08-18 2000-08-01 Sodhi; Chris Multipolar transmural probe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115812A2 (fr) * 1983-01-28 1984-08-15 C. Conradty Nürnberg GmbH & Co. KG Electrode conductrice de courant pour fours métallurgiques
US5531677A (en) * 1992-08-12 1996-07-02 Vidamed, Inc. Steerable medical probe with stylets
US6096035A (en) * 1995-08-18 2000-08-01 Sodhi; Chris Multipolar transmural probe

Also Published As

Publication number Publication date
WO2003077782A8 (fr) 2004-01-08
AU2003208604A1 (en) 2003-09-29
ITBS20020040U1 (it) 2003-09-22

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