WO2011119933A3 - Impedance mediated control of power delivery for electrosurgery - Google Patents

Impedance mediated control of power delivery for electrosurgery Download PDF

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Publication number
WO2011119933A3
WO2011119933A3 PCT/US2011/029958 US2011029958W WO2011119933A3 WO 2011119933 A3 WO2011119933 A3 WO 2011119933A3 US 2011029958 W US2011029958 W US 2011029958W WO 2011119933 A3 WO2011119933 A3 WO 2011119933A3
Authority
WO
WIPO (PCT)
Prior art keywords
impedance
energy
threshold value
pulse
sensed
Prior art date
Application number
PCT/US2011/029958
Other languages
French (fr)
Other versions
WO2011119933A2 (en
Inventor
Tim Koss
Miriam H. Taimisto
Roseanne Varner
Original Assignee
Aesculap Ag
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
Priority claimed from US12/748,229 external-priority patent/US8419727B2/en
Priority to CA2793961A priority Critical patent/CA2793961A1/en
Priority to KR1020127021689A priority patent/KR101818784B1/en
Priority to RU2012145668/14A priority patent/RU2012145668A/en
Priority to US13/637,533 priority patent/US9277962B2/en
Priority to EP11760294.6A priority patent/EP2552335B1/en
Application filed by Aesculap Ag filed Critical Aesculap Ag
Priority to MX2012008814A priority patent/MX2012008814A/en
Priority to AU2011230632A priority patent/AU2011230632A1/en
Priority to JP2013501509A priority patent/JP5883844B2/en
Priority to BR112012021212-5A priority patent/BR112012021212B1/en
Priority to ES11760294.6T priority patent/ES2562269T3/en
Priority to CN201180009484.0A priority patent/CN102834069B/en
Publication of WO2011119933A2 publication Critical patent/WO2011119933A2/en
Publication of WO2011119933A3 publication Critical patent/WO2011119933A3/en

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
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • 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
    • A61B18/1206—Generators therefor
    • A61B18/1233—Generators therefor with circuits for assuring patient safety
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • 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
    • 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
    • A61B2017/00026—Conductivity or impedance, e.g. of tissue
    • 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
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/0063—Sealing
    • 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
    • A61B2018/00642—Sensing and controlling the application of energy with feedback, i.e. closed loop control
    • 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
    • A61B2018/00666—Sensing and controlling the application of energy using a threshold value
    • A61B2018/00678—Sensing and controlling the application of energy using a threshold value upper
    • 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
    • A61B2018/00696—Controlled or regulated parameters
    • A61B2018/00702—Power or energy
    • 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
    • A61B2018/00696—Controlled or regulated parameters
    • A61B2018/00755—Resistance or impedance
    • 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
    • A61B2018/00875—Resistance or impedance
    • 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
    • A61B2018/00886—Duration

Abstract

A method of controlling electrosurgical power delivery based on a comparison of sensed tissue impedance to various impedance threshold values is provided. Energy is delivered to tissue in a sealing cycle as a series of pulses. An initial pulse has a profile with a preset energy starting value that increases at a ramping rate to a preset end value. Sensed impedance data are monitored throughout each pulse and compared to each of an impedance threshold value for RF setpoint, an impedance threshold value for cumulative time, and an impedance threshold value for energy cutback. Based on sensed impedance during a pulse, the profile of a subsequent pulse can be modified. In the event of a high impedance event that reflects low tissue presence, energy may be cutback. A sealing cycle is stopped when a cumulative amount of time with an impedance value over the impedance cumulative time threshold value reaches a sealing cycle duration limit.
PCT/US2011/029958 2010-03-26 2011-03-25 Impedance mediated control of power delivery for electrosurgery WO2011119933A2 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
CN201180009484.0A CN102834069B (en) 2010-03-26 2011-03-25 For electrosurgical power delivery impedance regulable control
AU2011230632A AU2011230632A1 (en) 2010-03-26 2011-03-25 Impedance mediated control of power delivery for electrosurgery
RU2012145668/14A RU2012145668A (en) 2010-03-26 2011-03-25 POWER SUPPLY MANAGEMENT BASED ON IMPEDANCE FOR ELECTROSURGERY
US13/637,533 US9277962B2 (en) 2010-03-26 2011-03-25 Impedance mediated control of power delivery for electrosurgery
EP11760294.6A EP2552335B1 (en) 2010-03-26 2011-03-25 Impedance mediated control of power delivery for electrosurgery
CA2793961A CA2793961A1 (en) 2010-03-26 2011-03-25 Impedance mediated control of power delivery for electrosurgery
MX2012008814A MX2012008814A (en) 2010-03-26 2011-03-25 Impedance mediated control of power delivery for electrosurgery.
KR1020127021689A KR101818784B1 (en) 2010-03-26 2011-03-25 Impedance mediated control of power delivery for electrosurgery
JP2013501509A JP5883844B2 (en) 2010-03-26 2011-03-25 Impedance-mediated control of power transfer for electrosurgery
BR112012021212-5A BR112012021212B1 (en) 2010-03-26 2011-03-25 ELECTROSURGICAL SYSTEM
ES11760294.6T ES2562269T3 (en) 2010-03-26 2011-03-25 Impedance-mediated power supply control for electrosurgery

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US12/748,229 2010-03-26
US12/748,229 US8419727B2 (en) 2010-03-26 2010-03-26 Impedance mediated power delivery for electrosurgery
US12/907,646 US8827992B2 (en) 2010-03-26 2010-10-19 Impedance mediated control of power delivery for electrosurgery
US12/907,646 2010-10-19

Publications (2)

Publication Number Publication Date
WO2011119933A2 WO2011119933A2 (en) 2011-09-29
WO2011119933A3 true WO2011119933A3 (en) 2012-03-01

Family

ID=44657254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2011/029958 WO2011119933A2 (en) 2010-03-26 2011-03-25 Impedance mediated control of power delivery for electrosurgery

Country Status (12)

Country Link
US (2) US8827992B2 (en)
EP (1) EP2552335B1 (en)
JP (1) JP5883844B2 (en)
KR (1) KR101818784B1 (en)
CN (1) CN102834069B (en)
AU (1) AU2011230632A1 (en)
BR (1) BR112012021212B1 (en)
CA (1) CA2793961A1 (en)
ES (1) ES2562269T3 (en)
MX (1) MX2012008814A (en)
RU (1) RU2012145668A (en)
WO (1) WO2011119933A2 (en)

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