CA2123960A1 - Current sensor for medical devices with continuity monitor - Google Patents

Current sensor for medical devices with continuity monitor

Info

Publication number
CA2123960A1
CA2123960A1 CA002123960A CA2123960A CA2123960A1 CA 2123960 A1 CA2123960 A1 CA 2123960A1 CA 002123960 A CA002123960 A CA 002123960A CA 2123960 A CA2123960 A CA 2123960A CA 2123960 A1 CA2123960 A1 CA 2123960A1
Authority
CA
Canada
Prior art keywords
current
load
conductor
source
delivered
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
CA002123960A
Other languages
French (fr)
Other versions
CA2123960C (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
Priority claimed from US08/069,359 external-priority patent/US5436566A/en
Application filed by Conmed Corp filed Critical Conmed Corp
Publication of CA2123960A1 publication Critical patent/CA2123960A1/en
Application granted granted Critical
Publication of CA2123960C publication Critical patent/CA2123960C/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
    • 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
    • A61B2018/00773—Sensed parameters
    • A61B2018/00827—Current

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Otolaryngology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of Current Or Voltage (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 includes a reference conductor which is located beside and is preferably twisted together with the primary conductor along the length thereof and which is connected to the medical implement load through a resistor at the load of a value such as to effectively electrically isolate the reference conductor from the load. A subtractor subtracts 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.
CA002123960A 1993-06-01 1994-05-19 Current sensor for medical devices with continuity monitor Expired - Lifetime CA2123960C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/069,359 1993-06-01
US08/069,359 US5436566A (en) 1992-03-17 1993-06-01 Leakage capacitance compensating current sensor for current supplied to medical device loads

Publications (2)

Publication Number Publication Date
CA2123960A1 true CA2123960A1 (en) 1994-12-02
CA2123960C CA2123960C (en) 2005-07-05

Family

ID=22088457

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002123960A Expired - Lifetime CA2123960C (en) 1993-06-01 1994-05-19 Current sensor for medical devices with continuity monitor

Country Status (7)

Country Link
JP (1) JP3529837B2 (en)
AU (1) AU671902B2 (en)
CA (1) CA2123960C (en)
DE (1) DE4419070C2 (en)
FR (1) FR2706041B1 (en)
GB (1) GB2278548B (en)
IT (1) ITGE940066A1 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5436566A (en) * 1992-03-17 1995-07-25 Conmed Corporation Leakage capacitance compensating current sensor for current supplied to medical device loads
GB0002607D0 (en) * 2000-02-05 2000-03-29 Smiths Industries Plc Cable testing
DE10211763A1 (en) * 2002-03-14 2003-09-25 Abb Research Ltd Interference voltage magnitude determination method for determination of longitudinal voltages coupled from short circuits or lightning strikes in signal cables routed adjacent to power cables
WO2006023456A2 (en) * 2004-08-17 2006-03-02 Encision, Inc. System and method for monitoring eletrosurgical instruments
US7465302B2 (en) 2004-08-17 2008-12-16 Encision, Inc. System and method for performing an electrosurgical procedure
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
US9833281B2 (en) 2008-08-18 2017-12-05 Encision Inc. Enhanced control systems including flexible shielding and support systems for electrosurgical applications
EP2323578B1 (en) 2008-08-18 2018-10-03 Encision, Inc. Enhanced control systems including flexible shielding and support systems for electrosurgical applications
US8882767B2 (en) 2009-04-24 2014-11-11 Megadyne Medical Products, Inc. Electrosurgical instrument with adjustable utility conduit
US8882768B2 (en) 2009-04-24 2014-11-11 Megadyne Medical Products, Inc. Hand piece with adjustable utility conduit
US9259260B2 (en) 2013-03-14 2016-02-16 Megadyne Medical Products, Inc. Fluid evacuation device
US9375253B2 (en) 2013-03-14 2016-06-28 Megadyne Medical Products, Inc. Electrosurgical instrument
USD709196S1 (en) 2013-03-15 2014-07-15 Megadyne Medical Products, Inc. Hand piece
EP4338791A3 (en) * 2019-02-21 2024-05-22 Envoy Medical Corporation Implantable cochlear system with integrated components and lead characterization
US11564046B2 (en) 2020-08-28 2023-01-24 Envoy Medical Corporation Programming of cochlear implant accessories
US11471689B2 (en) 2020-12-02 2022-10-18 Envoy Medical Corporation Cochlear implant stimulation calibration
US11806531B2 (en) 2020-12-02 2023-11-07 Envoy Medical Corporation Implantable cochlear system with inner ear sensor
US11697019B2 (en) 2020-12-02 2023-07-11 Envoy Medical Corporation Combination hearing aid and cochlear implant system
US11633591B2 (en) 2021-02-23 2023-04-25 Envoy Medical Corporation Combination implant system with removable earplug sensor and implanted battery
US11839765B2 (en) 2021-02-23 2023-12-12 Envoy Medical Corporation Cochlear implant system with integrated signal analysis functionality
US11865339B2 (en) 2021-04-05 2024-01-09 Envoy Medical Corporation Cochlear implant system with electrode impedance diagnostics

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626698C2 (en) * 1985-08-26 1993-12-02 Siemens Ag HF surgery device
DE3621572C2 (en) * 1985-12-16 1994-07-14 Siemens Ag Circuit arrangement for operating an HF surgical device
ATE62766T1 (en) * 1986-03-04 1991-05-15 Siemens Ag CAPACITIVE INTRUSION PROTECTION SYSTEM.
GB2213381B (en) * 1987-12-12 1992-06-03 Univ Wales Medicine Surgical diathermy instruments
DE3824913A1 (en) * 1988-07-22 1990-02-01 Thomas Hill Device for monitoring high-frequency (radio-frequency) electric leakage currents
US5152762A (en) * 1990-11-16 1992-10-06 Birtcher Medical Systems, Inc. Current leakage control for electrosurgical generator
US5432459A (en) * 1992-03-17 1995-07-11 Conmed Corporation Leakage capacitance compensating current sensor for current supplied to medical device loads with unconnected reference conductor
AU659261B2 (en) * 1992-06-19 1995-05-11 Conmed Corporation Electrosurgical trocar assembly
DE4237761C2 (en) * 1992-11-09 2002-07-11 Storz Karl Gmbh & Co Kg High-frequency surgery facility

Also Published As

Publication number Publication date
DE4419070A1 (en) 1994-12-08
FR2706041A1 (en) 1994-12-09
CA2123960C (en) 2005-07-05
JPH07412A (en) 1995-01-06
AU6062794A (en) 1994-12-08
DE4419070C2 (en) 1999-08-26
GB2278548B (en) 1996-11-20
GB9410305D0 (en) 1994-07-13
GB2278548A (en) 1994-12-07
FR2706041B1 (en) 1996-03-15
JP3529837B2 (en) 2004-05-24
ITGE940066A1 (en) 1995-11-25
ITGE940066A0 (en) 1994-05-25
AU671902B2 (en) 1996-09-12

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20140520