CA2217538A1 - Systems and methods for ablating body tissue using predicted maximum tissue temperature - Google Patents

Systems and methods for ablating body tissue using predicted maximum tissue temperature

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Publication number
CA2217538A1
CA2217538A1 CA2217538A CA2217538A CA2217538A1 CA 2217538 A1 CA2217538 A1 CA 2217538A1 CA 2217538 A CA2217538 A CA 2217538A CA 2217538 A CA2217538 A CA 2217538A CA 2217538 A1 CA2217538 A1 CA 2217538A1
Authority
CA
Canada
Prior art keywords
tissue
systems
electrode
methods
predicted maximum
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.)
Granted
Application number
CA2217538A
Other languages
French (fr)
Other versions
CA2217538C (en
Inventor
Dorin Panescu
Sidney D. Fleischman
David K. Swanson
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.)
Boston Scientific Ltd Barbados
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
Publication of CA2217538A1 publication Critical patent/CA2217538A1/en
Application granted granted Critical
Publication of CA2217538C publication Critical patent/CA2217538C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
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    • 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
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    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
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    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • 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
    • A61B18/1206—Generators therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00084—Temperature
    • A61B2017/00092—Temperature using thermocouples
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B2017/00137—Details of operation mode
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
    • A61B2017/003—Steerable
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    • A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
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    • A61B2018/00023—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids closed, i.e. without wound contact by the fluid
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    • A61B2018/00029—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids open
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    • A61B2018/00351—Heart
    • A—HUMAN NECESSITIES
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    • A61B2018/00577—Ablation
    • A—HUMAN NECESSITIES
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    • A61B2018/0066—Sensing and controlling the application of energy without feedback, i.e. open loop control
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    • 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
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    • A61B2018/1472—Probes or electrodes therefor for use with liquid electrolyte, e.g. virtual electrodes

Abstract

This invention is systems and methods that ablate body tissue using an electrode (16) for contacting tissue at a tissue electrode interface to transmit ablation energy at a determinable power level. The systems and methods include an element (50) to remove heat from the electrode (16) at a determinable rate. The systems and methods employ a processing element (98) to derive a prediction of the maximum tissue temperature condition occurring beneath the tissue electrode interface. The processing element (98) controls the power level of ablation energy transmitted by the electrode (16), or the rate at which the electrode (16) is cooled, or both, based, at least in part, upon the maximum tissue temperature prediction.
CA002217538A 1995-05-01 1996-04-30 Systems and methods for ablating body tissue using predicted maximum tissue temperature Expired - Fee Related CA2217538C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/431,775 US5735846A (en) 1994-06-27 1995-05-01 Systems and methods for ablating body tissue using predicted maximum tissue temperature
US08/431,775 1995-05-01
PCT/US1996/005978 WO1996034569A1 (en) 1995-05-01 1996-04-30 Systems and methods for ablating body tissue using predicted maximum tissue temperature

Publications (2)

Publication Number Publication Date
CA2217538A1 true CA2217538A1 (en) 1996-11-07
CA2217538C CA2217538C (en) 2000-09-26

Family

ID=23713376

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002217538A Expired - Fee Related CA2217538C (en) 1995-05-01 1996-04-30 Systems and methods for ablating body tissue using predicted maximum tissue temperature

Country Status (8)

Country Link
US (1) US5735846A (en)
EP (1) EP0823843B1 (en)
JP (3) JP3824090B2 (en)
AT (1) ATE306219T1 (en)
CA (1) CA2217538C (en)
DE (1) DE69635273T2 (en)
ES (1) ES2249780T3 (en)
WO (1) WO1996034569A1 (en)

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