GB1338021A - Medical instrumentation systems incorporating patient protection devices - Google Patents

Medical instrumentation systems incorporating patient protection devices

Info

Publication number
GB1338021A
GB1338021A GB2168871A GB2168871A GB1338021A GB 1338021 A GB1338021 A GB 1338021A GB 2168871 A GB2168871 A GB 2168871A GB 2168871 A GB2168871 A GB 2168871A GB 1338021 A GB1338021 A GB 1338021A
Authority
GB
United Kingdom
Prior art keywords
patient
ground
rectifier
protection devices
systems incorporating
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.)
Expired
Application number
GB2168871A
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.)
Sanmina Corp
Original Assignee
SCI Systems Inc
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 SCI Systems Inc filed Critical SCI Systems Inc
Publication of GB1338021A publication Critical patent/GB1338021A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • 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

  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)

Abstract

1338021 Electro-medical apparatus S C I SYSTEMS Inc 19 April 1971 [12 Feb 1970] 21688/71 Heading G1N In a physiological monitoring system, e.g. an ECG or EEG recorder, a patient 32 is prevented from receiving electric shocks by connecting a full-wave diode bridge rectifier 14 between the ground of the instrument 28 and the patient and applying a steady state current of about 10 micro amps to the bridge so that for currents between the patient and ground of less than the current supply value, the rectifier presents a relatively low impedance, but for currents above said value it presents a high impedance, thereby protecting the patient. In a modification, Fig. 2 (not shown), two current sources 12 are connected in series with their junction connected to the ground of the instruments, and more than one patient can be protected by the same rectifier.
GB2168871A 1970-02-12 1971-04-19 Medical instrumentation systems incorporating patient protection devices Expired GB1338021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1073670A 1970-02-12 1970-02-12

Publications (1)

Publication Number Publication Date
GB1338021A true GB1338021A (en) 1973-11-21

Family

ID=21747154

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2168871A Expired GB1338021A (en) 1970-02-12 1971-04-19 Medical instrumentation systems incorporating patient protection devices

Country Status (6)

Country Link
US (1) US3590322A (en)
CA (1) CA969621A (en)
CH (1) CH532936A (en)
DE (1) DE2104574A1 (en)
FR (1) FR2078333A5 (en)
GB (1) GB1338021A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2340123A1 (en) * 1973-08-08 1975-02-20 Schwarzer Gmbh Fritz OVERCURRENT PROTECTION CIRCUIT
CA996634A (en) * 1974-02-22 1976-09-07 Malcolm P. Macmartin Adjustable line isolation monitor
US3968802A (en) * 1975-01-24 1976-07-13 Medtronic, Inc. Cautery protection circuit for a heart pacemaker
EP0001003A3 (en) * 1977-08-26 1979-03-21 Coal Industry (Patents) Limited Apparatus and method for operating a dynamo-eletric machine
DE3728906A1 (en) * 1987-08-29 1989-03-09 Asea Brown Boveri METHOD FOR DETECTING A CURRENT FLOWS CURRENTLY FLOWING FROM THE HUMAN BODY AND CIRCUIT ARRANGEMENT FOR IMPLEMENTING THE METHOD
DE3903025A1 (en) * 1989-02-02 1990-08-09 Asea Brown Boveri Method for protecting individuals
GB9125280D0 (en) * 1991-11-28 1992-01-29 Smiths Industries Plc Patient support tables and monitors
EP0554484B1 (en) * 1992-02-05 1996-06-19 Siemens Aktiengesellschaft Three-phase power supply
US5736038A (en) * 1996-03-06 1998-04-07 United Medical Manufacturing Co. Apparatus for patient safety protection in a medical device with an electrified element
US5909138A (en) * 1996-06-27 1999-06-01 Survivalink Corporation Fast isolated IGBT driver for high voltage switching circuitry
US5674266A (en) * 1996-06-27 1997-10-07 Survivalink Corporation Biphasic defibrillation isolation circuit and method
US5995348A (en) * 1997-09-19 1999-11-30 Acuson Corporation Ground safety device for medical ultrasound probes
AU5316199A (en) 1998-07-16 2000-02-07 Surviva-Link Corporation Full-tilt exponential defibrillation waveform
US6615067B2 (en) * 2000-03-21 2003-09-02 Radi Medical Systems Ab Method and device for measuring physical characteristics in a body
US6967309B2 (en) 2000-06-14 2005-11-22 American Healthcare Products, Inc. Personal warming systems and apparatuses for use in hospitals and other settings, and associated methods of manufacture and use
WO2001095841A2 (en) 2000-06-14 2001-12-20 American Healthcare Products,Inc. Heating pad systems for patient warming
US6933469B2 (en) 2000-06-14 2005-08-23 American Healthcare Products, Inc. Personal warming systems and apparatuses for use in hospitals and other settings, and associated methods of manufacture and use
US9408939B2 (en) 2013-03-15 2016-08-09 Medline Industries, Inc. Anti-microbial air processor for a personal patient warming apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3515941A (en) * 1967-10-24 1970-06-02 Aston L Moore Electrical leakage detector

Also Published As

Publication number Publication date
US3590322A (en) 1971-06-29
FR2078333A5 (en) 1971-11-05
CH532936A (en) 1973-01-31
CA969621A (en) 1975-06-17
DE2104574A1 (en) 1971-08-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees