GB1186123A - Physiological Monitoring System - Google Patents
Physiological Monitoring SystemInfo
- Publication number
- GB1186123A GB1186123A GB33230/68A GB3323068A GB1186123A GB 1186123 A GB1186123 A GB 1186123A GB 33230/68 A GB33230/68 A GB 33230/68A GB 3323068 A GB3323068 A GB 3323068A GB 1186123 A GB1186123 A GB 1186123A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pass filter
- bias
- july
- turn
- input
- 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
Links
- 238000012544 monitoring process Methods 0.000 title 1
- 238000013459 approach Methods 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/0809—Detecting, measuring or recording devices for evaluating the respiratory organs by impedance pneumography
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/276—Protection against electrode failure
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physiology (AREA)
- Pulmonology (AREA)
- Cardiology (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
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 ".
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US65680567A | 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 |
---|---|---|---|
GB33230/68A 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)
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)
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 | Franz Josef Dipl.-Phys. Dankwart | MEASURING DEVICE FOR THORAX IMPEDANCE MEASUREMENT |
FR2471770A3 (en) * | 1979-12-21 | 1981-06-26 | Radiologie Cie Gle | Respiration monitoring equipment - uses phase variation of trans-thoracic signal to identify respiratory activity |
DE3110843C2 (en) * | 1981-03-20 | 1982-12-02 | Hewlett-Packard GmbH, 7030 Böblingen | Breath monitor |
US4449537A (en) * | 1982-03-08 | 1984-05-22 | Hewlett-Packard Gmbh | Respiration monitor |
-
1968
- 1968-07-11 GB GB33230/68A patent/GB1186123A/en not_active Expired
- 1968-07-13 DE DE1766759A patent/DE1766759B2/en active Pending
- 1968-07-26 FR FR1575190D patent/FR1575190A/fr not_active Expired
Cited By (1)
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 |
FR1575190A (en) | 1969-07-18 |
DE1766759A1 (en) | 1972-02-24 |
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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 [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |