CA2111617A1 - Current Sensor for Medical Devices Including Connector Cables - Google Patents

Current Sensor for Medical Devices Including Connector Cables

Info

Publication number
CA2111617A1
CA2111617A1 CA2111617A CA2111617A CA2111617A1 CA 2111617 A1 CA2111617 A1 CA 2111617A1 CA 2111617 A CA2111617 A CA 2111617A CA 2111617 A CA2111617 A CA 2111617A CA 2111617 A1 CA2111617 A1 CA 2111617A1
Authority
CA
Canada
Prior art keywords
current
source
load
conductor
primary conductor
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
CA2111617A
Other languages
French (fr)
Other versions
CA2111617C (en
Inventor
Richard K. Thompson
Ernesto G. Sevilla
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.)
Conmed Corp
Original Assignee
Conmed Corp
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 Conmed Corp filed Critical Conmed Corp
Priority claimed from DE4405822A external-priority patent/DE4405822A1/en
Publication of CA2111617A1 publication Critical patent/CA2111617A1/en
Application granted granted Critical
Publication of CA2111617C publication Critical patent/CA2111617C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3462—Trocars; Puncturing needles with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3476—Powered trocars, e.g. electrosurgical cutting, lasers, powered knives
    • 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
    • A61B18/1487—Trocar-like, i.e. devices producing an enlarged transcutaneous opening
    • 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
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00696—Controlled or regulated parameters
    • A61B2018/00738—Depth, e.g. depth of ablation
    • 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
    • A61B2018/00827—Current
    • 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
    • A61B2018/1246—Generators therefor characterised by the output polarity
    • A61B2018/126—Generators therefor characterised by the output polarity bipolar
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/08—Accessories or related features not otherwise provided for
    • A61B2090/0801—Prevention of accidental cutting or pricking
    • A61B2090/08021—Prevention of accidental cutting or pricking of the patient or his organs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00—Surgery
    • Y10S128/908—Patient protection from electric shock

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Veterinary Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Public Health (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Otolaryngology (AREA)
  • Surgical Instruments (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)

Abstract

A current sensing device enables sensing the current being delivered from a source to a load at a medical implement connected to the distal end of a primary conductor connected between the source and the load in situations wherein distributed capacitance between the primary conductor and a return path to the source prevents a measurement of current at the source end of the primary conductor from being an accurate measurement of the delivered current. The current sensing device comprises a reference conductor which is located beside and twisted together with the primary conductor along the length thereof but which terminates short of, and is not connected to, the medical implement load, and a subtractor for subtracting the current flowing through the reference conductor from the total load current flowing to the medical implement so as to offset the effect of the distributed capacitance and to thereby produce a current measurement corresponding to the delivered current. The subtractor can comprise a current transformer through which the conductors extend in opposing relation. An integrity detector monitors whether the reference conductor is intact.
CA002111617A 1993-01-27 1993-12-16 Current sensor for medical devices including connector cables Expired - Lifetime CA2111617C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/009,598 1993-01-27
US08/009,598 US5432459A (en) 1992-03-17 1993-01-27 Leakage capacitance compensating current sensor for current supplied to medical device loads with unconnected reference conductor
DE4405822A DE4405822A1 (en) 1993-01-27 1994-02-23 Current sensor for medical device e.g. electrosurgical trocars and RF ablation device

Publications (2)

Publication Number Publication Date
CA2111617A1 true CA2111617A1 (en) 1994-07-28
CA2111617C CA2111617C (en) 1999-01-26

Family

ID=25934073

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002111617A Expired - Lifetime CA2111617C (en) 1993-01-27 1993-12-16 Current sensor for medical devices including connector cables

Country Status (7)

Country Link
US (1) US5432459A (en)
JP (1) JP3426311B2 (en)
AU (1) AU660866B2 (en)
CA (1) CA2111617C (en)
FR (1) FR2700857B1 (en)
GB (1) GB2274592B (en)
IT (1) ITGE940003A1 (en)

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US7137980B2 (en) 1998-10-23 2006-11-21 Sherwood Services Ag Method and system for controlling output of RF medical generator
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ES2289307T3 (en) 2002-05-06 2008-02-01 Covidien Ag BLOOD DETECTOR TO CONTROL AN ELECTROCHIRURGICAL UNIT.
US20070049945A1 (en) 2002-05-31 2007-03-01 Miller Larry J Apparatus and methods to install, support and/or monitor performance of intraosseous devices
US8668698B2 (en) 2002-05-31 2014-03-11 Vidacare Corporation Assembly for coupling powered driver with intraosseous device
EP3292821A1 (en) 2002-05-31 2018-03-14 Vidacare LLC Apparatus and method to access bone marrow
US10973545B2 (en) 2002-05-31 2021-04-13 Teleflex Life Sciences Limited Powered drivers, intraosseous devices and methods to access bone marrow
US8641715B2 (en) 2002-05-31 2014-02-04 Vidacare Corporation Manual intraosseous device
US11337728B2 (en) 2002-05-31 2022-05-24 Teleflex Life Sciences Limited Powered drivers, intraosseous devices and methods to access bone marrow
US7044948B2 (en) 2002-12-10 2006-05-16 Sherwood Services Ag Circuit for controlling arc energy from an electrosurgical generator
AU2004235739B2 (en) 2003-05-01 2010-06-17 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US9504477B2 (en) 2003-05-30 2016-11-29 Vidacare LLC Powered driver
EP1675499B1 (en) 2003-10-23 2011-10-19 Covidien AG Redundant temperature monitoring in electrosurgical systems for safety mitigation
AU2003286644B2 (en) 2003-10-23 2009-09-10 Covidien Ag Thermocouple measurement circuit
US7396336B2 (en) 2003-10-30 2008-07-08 Sherwood Services Ag Switched resonant ultrasonic power amplifier system
US7131860B2 (en) 2003-11-20 2006-11-07 Sherwood Services Ag Connector systems for electrosurgical generator
US7300435B2 (en) * 2003-11-21 2007-11-27 Sherwood Services Ag Automatic control system for an electrosurgical generator
US7766905B2 (en) 2004-02-12 2010-08-03 Covidien Ag Method and system for continuity testing of medical electrodes
US7780662B2 (en) 2004-03-02 2010-08-24 Covidien Ag Vessel sealing system using capacitive RF dielectric heating
US20060041252A1 (en) 2004-08-17 2006-02-23 Odell Roger C System and method for monitoring electrosurgical instruments
US7422589B2 (en) * 2004-08-17 2008-09-09 Encision, Inc. System and method for performing an electrosurgical procedure
US7465302B2 (en) * 2004-08-17 2008-12-16 Encision, Inc. System and method for performing an electrosurgical procedure
US7628786B2 (en) 2004-10-13 2009-12-08 Covidien Ag Universal foot switch contact port
US9474564B2 (en) 2005-03-31 2016-10-25 Covidien Ag Method and system for compensating for external impedance of an energy carrying component when controlling an electrosurgical generator
US20070066971A1 (en) * 2005-09-21 2007-03-22 Podhajsky Ronald J Method and system for treating pain during an electrosurgical procedure
US8734438B2 (en) 2005-10-21 2014-05-27 Covidien Ag Circuit and method for reducing stored energy in an electrosurgical generator
US7947039B2 (en) 2005-12-12 2011-05-24 Covidien Ag Laparoscopic apparatus for performing electrosurgical procedures
US7513896B2 (en) 2006-01-24 2009-04-07 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
CA2574935A1 (en) 2006-01-24 2007-07-24 Sherwood Services Ag A method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US8216223B2 (en) 2006-01-24 2012-07-10 Covidien Ag System and method for tissue sealing
US8147485B2 (en) 2006-01-24 2012-04-03 Covidien Ag System and method for tissue sealing
US8685016B2 (en) 2006-01-24 2014-04-01 Covidien Ag System and method for tissue sealing
EP1810634B8 (en) 2006-01-24 2015-06-10 Covidien AG System for tissue sealing
US9186200B2 (en) 2006-01-24 2015-11-17 Covidien Ag System and method for tissue sealing
CA2574934C (en) 2006-01-24 2015-12-29 Sherwood Services Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US7651493B2 (en) 2006-03-03 2010-01-26 Covidien Ag System and method for controlling electrosurgical snares
US7648499B2 (en) 2006-03-21 2010-01-19 Covidien Ag System and method for generating radio frequency energy
US7651492B2 (en) 2006-04-24 2010-01-26 Covidien Ag Arc based adaptive control system for an electrosurgical unit
US8753334B2 (en) 2006-05-10 2014-06-17 Covidien Ag System and method for reducing leakage current in an electrosurgical generator
US7731717B2 (en) 2006-08-08 2010-06-08 Covidien Ag System and method for controlling RF output during tissue sealing
US8034049B2 (en) 2006-08-08 2011-10-11 Covidien Ag System and method for measuring initial tissue impedance
US8944069B2 (en) 2006-09-12 2015-02-03 Vidacare Corporation Assemblies for coupling intraosseous (IO) devices to powered drivers
US7794457B2 (en) 2006-09-28 2010-09-14 Covidien Ag Transformer for RF voltage sensing
US8777941B2 (en) 2007-05-10 2014-07-15 Covidien Lp Adjustable impedance electrosurgical electrodes
US7834484B2 (en) 2007-07-16 2010-11-16 Tyco Healthcare Group Lp Connection cable and method for activating a voltage-controlled generator
US8216220B2 (en) 2007-09-07 2012-07-10 Tyco Healthcare Group Lp System and method for transmission of combined data stream
US8512332B2 (en) 2007-09-21 2013-08-20 Covidien Lp Real-time arc control in electrosurgical generators
US8979834B2 (en) * 2008-03-27 2015-03-17 Bovie Medical Corporation Laparoscopic electrosurgical electrical leakage detection
US8100897B2 (en) 2008-03-27 2012-01-24 Bovie Medical Corporation Laparoscopic electrosurgical electrical leakage detection
ES2428719T3 (en) 2008-03-31 2013-11-11 Applied Medical Resources Corporation Electrosurgical system with means to measure tissue permittivity and conductivity
US8226639B2 (en) 2008-06-10 2012-07-24 Tyco Healthcare Group Lp System and method for output control of electrosurgical generator
US8262652B2 (en) 2009-01-12 2012-09-11 Tyco Healthcare Group Lp Imaginary impedance process monitoring and intelligent shut-off
US8882768B2 (en) 2009-04-24 2014-11-11 Megadyne Medical Products, Inc. Hand piece with adjustable utility conduit
US8882767B2 (en) 2009-04-24 2014-11-11 Megadyne Medical Products, Inc. Electrosurgical instrument with adjustable utility conduit
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US9375253B2 (en) 2013-03-14 2016-06-28 Megadyne Medical Products, Inc. Electrosurgical instrument
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USD709196S1 (en) 2013-03-15 2014-07-15 Megadyne Medical Products, Inc. Hand piece
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US10420603B2 (en) 2014-12-23 2019-09-24 Applied Medical Resources Corporation Bipolar electrosurgical sealer and divider
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Also Published As

Publication number Publication date
CA2111617C (en) 1999-01-26
JP3426311B2 (en) 2003-07-14
GB2274592B (en) 1996-12-18
AU660866B2 (en) 1995-07-06
JPH06233780A (en) 1994-08-23
FR2700857A1 (en) 1994-07-29
GB2274592A (en) 1994-08-03
ITGE940003A1 (en) 1995-07-12
FR2700857B1 (en) 1996-03-01
AU5301794A (en) 1994-08-18
GB9325774D0 (en) 1994-02-16
ITGE940003A0 (en) 1994-01-12
US5432459A (en) 1995-07-11

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20131216