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

Medical instrumentation systems incorporating patient protection devices

Info

Publication number
GB1338021A
GB1338021AGB2168871AGB2168871AGB1338021AGB 1338021 AGB1338021 AGB 1338021AGB 2168871 AGB2168871 AGB 2168871AGB 2168871 AGB2168871 AGB 2168871AGB 1338021 AGB1338021 AGB 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 IncfiledCriticalSCI Systems Inc
Publication of GB1338021ApublicationCriticalpatent/GB1338021A/en
Expiredlegal-statusCriticalCurrent

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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.
GB2168871A1970-02-121971-04-19Medical instrumentation systems incorporating patient protection devicesExpiredGB1338021A (en)

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
US1073670A1970-02-121970-02-12

Publications (1)

Publication NumberPublication Date
GB1338021Atrue GB1338021A (en)1973-11-21

Family

ID=21747154

Family Applications (1)

Application NumberTitlePriority DateFiling Date
GB2168871AExpiredGB1338021A (en)1970-02-121971-04-19Medical instrumentation systems incorporating patient protection devices

Country Status (6)

CountryLink
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 numberPriority datePublication dateAssigneeTitle
DE2340123A1 (en)*1973-08-081975-02-20Schwarzer Gmbh Fritz OVERCURRENT PROTECTION CIRCUIT
CA996634A (en)*1974-02-221976-09-07Malcolm P. MacmartinAdjustable line isolation monitor
US3968802A (en)*1975-01-241976-07-13Medtronic, Inc.Cautery protection circuit for a heart pacemaker
NL7815033A (en)*1977-08-261979-09-28Coal Industry Patents Ltd APPARATUS AND METHOD FOR OPERATING A DYNAMO-ELECTRIC MACHINE.
DE3728906A1 (en)*1987-08-291989-03-09Asea Brown Boveri METHOD FOR DETECTING A CURRENT FLOWS CURRENTLY FLOWING FROM THE HUMAN BODY AND CIRCUIT ARRANGEMENT FOR IMPLEMENTING THE METHOD
DE3903025A1 (en)*1989-02-021990-08-09Asea Brown BoveriMethod for protecting individuals
GB9125280D0 (en)*1991-11-281992-01-29Smiths Industries PlcPatient support tables and monitors
DE59206616D1 (en)*1992-02-051996-07-25Siemens Ag Three-phase power supply
US5736038A (en)*1996-03-061998-04-07United Medical Manufacturing Co.Apparatus for patient safety protection in a medical device with an electrified element
US5674266A (en)*1996-06-271997-10-07Survivalink CorporationBiphasic defibrillation isolation circuit and method
US5909138A (en)*1996-06-271999-06-01Survivalink CorporationFast isolated IGBT driver for high voltage switching circuitry
US5995348A (en)*1997-09-191999-11-30Acuson CorporationGround safety device for medical ultrasound probes
US6539255B1 (en)1998-07-162003-03-25Cardiac Science, Inc.Full-tilt exponential defibrillation waveform
US6615067B2 (en)*2000-03-212003-09-02Radi Medical Systems AbMethod and device for measuring physical characteristics in a body
US6967309B2 (en)2000-06-142005-11-22American Healthcare Products, Inc.Personal warming systems and apparatuses for use in hospitals and other settings, and associated methods of manufacture and use
EP1355598A2 (en)2000-06-142003-10-29American Healthcare Products, Inc.Heating pad systems for patient warming
US6933469B2 (en)2000-06-142005-08-23American Healthcare Products, Inc.Personal warming systems and apparatuses for use in hospitals and other settings, and associated methods of manufacture and use
US9408939B2 (en)2013-03-152016-08-09Medline Industries, Inc.Anti-microbial air processor for a personal patient warming apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US3515941A (en)*1967-10-241970-06-02Aston L MooreElectrical leakage detector

Also Published As

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

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Legal Events

DateCodeTitleDescription
PSPatent sealed [section 19, patents act 1949]
PLNPPatent lapsed through nonpayment of renewal fees
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