GB1186123A - Physiological Monitoring System - Google Patents

Physiological Monitoring System

Info

Publication number
GB1186123A
GB1186123A GB3323068A GB3323068A GB1186123A GB 1186123 A GB1186123 A GB 1186123A GB 3323068 A GB3323068 A GB 3323068A GB 3323068 A GB3323068 A GB 3323068A GB 1186123 A GB1186123 A GB 1186123A
Authority
GB
United Kingdom
Prior art keywords
pass filter
hz
bias
july
turn
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
GB3323068A
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.)
Beckman Coulter Inc
Original Assignee
Beckman Coulter 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
Priority to US65680567A priority Critical
Application filed by Beckman Coulter Inc filed Critical Beckman Coulter Inc
Publication of GB1186123A publication Critical patent/GB1186123A/en
Application status is Expired legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/04Measuring bioelectric signals of the body or parts thereof
    • A61B5/0402Electrocardiography, i.e. ECG
    • A61B5/0408Electrodes specially adapted therefor
    • A61B5/0424Protection against electrode failure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/08Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/0809Detecting, measuring or recording devices for evaluating the respiratory organs by impedance pneumography

Abstract

1,186,123. Transistor amplifying and switching circuits. BECKMAN INSTRUMENTS Inc. 11 July, 1968 [28 July,1967], No. 33230/68. Heading H3T. [Also in Division Gl] Filter circuit, Fig. 12.-A very low frequency band-pass filter, for use in electromedical apparatus, comprises an active low-pass filter 146 and high-pass filter 148 in front of an operational amplifier 150, and similar filters 152, 154 following. The input low-pass filter provides a 12dB roll-off at 2 Hz and the high-pass filter rolls-off at 0À2 Hz. The output filters are set to slightly wider limits, e.g. 4 Hz and 0À1 Hz to give a pass-band as illustrated in Fig. 14 (not shown). Switching circuit, Fig. 15, has an adjustable switching level according to the value of " bias " resistor R14. With no signal input Q 3 is OFF and Q 4 , Q 5 , ON. As the input signal approaches the " bias " value Q 3 begins to turn ON and Q 4 , Q 5 , begin to turn OFF; diode 162 conducts to swing Q 4 bias towards -12 V and rapid cut-off. Q 3 may be a " Darlington pair ".
GB3323068A 1967-07-28 1968-07-11 Physiological Monitoring System Expired GB1186123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US65680567A true 1967-07-28 1967-07-28

Publications (1)

Publication Number Publication Date
GB1186123A true GB1186123A (en) 1970-04-02

Family

ID=24634644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3323068A Expired GB1186123A (en) 1967-07-28 1968-07-11 Physiological Monitoring System

Country Status (3)

Country Link
DE (1) DE1766759B2 (en)
FR (1) FR1575190A (en)
GB (1) GB1186123A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980075A (en) * 1973-02-08 1976-09-14 Audronics, Inc. Photoelectric physiological measuring apparatus

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4289142A (en) * 1978-11-24 1981-09-15 Kearns Kenneth L Physiological occurrence, such as apnea, monitor and X-ray triggering device
DE2949887A1 (en) * 1979-12-12 1981-06-19 Dankwart Franz Josef Measuring device for thoracic impedance measurement
FR2471770B3 (en) * 1979-12-21 1981-10-16 Radiologie Cie Gle
DE3110843C2 (en) * 1981-03-20 1982-12-02 Hewlett-Packard Gmbh, 7030 Boeblingen, De
US4449537A (en) * 1982-03-08 1984-05-22 Hewlett-Packard Gmbh Respiration monitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980075A (en) * 1973-02-08 1976-09-14 Audronics, Inc. Photoelectric physiological measuring apparatus

Also Published As

Publication number Publication date
DE1766759B2 (en) 1974-10-31
DE1766759A1 (en) 1972-02-24
FR1575190A (en) 1969-07-18

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Legal Events

Date Code Title Description
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
SPA Amended specification published
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees