US3898984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ambulatory patient monitoring system
Assignee: United States Department of the Navy
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Filing: 1974-02-04
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Granted: 1975-08-12
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Expires: 1994-02-04
Abstract
Abstract An apparatus for automatically monitoring critical body functions of one or more patients by means of telemetry restricted to the use of a single assigned RF carrier frequency. A logic circuit provides for generating a synchronized coded word for interrogating a transponder. The transponder has sensing means for sensing the critical body functions and in response to the interrogation transmits an information signal plus a triggering signal to cause sequential generation of coded words so that each of the transponders may be sequentially interrogated. Provision is also made for selectively interrogating a particular transponder if the need arises.
Inventors
- 👤 Louis Mandel
- 👤 Algernon M Ong
- 👤 Paul Singer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:06
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/0002; A61B5/0004; A61B5/0006; H; H04; H04Q; H04Q9/00; H04Q9/14; Y; Y10; Y10S; Y10S128/00; Y10S128/903
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
278 words
A system for automatically monitoring critical body functions of one or more ambulatory patients, the combination of: a. an interrogating and monitoring station operating on a fixed frequency having means for generating and transmitting a plurality of digital coded interrogating signals and having means for receiving and displaying critical body function information received in response to said transmitted signal, b. at least one patient transponder operating at said fixed frequency and having sensing means coupled to the patient for sensing at least one critical body function and being responsive to at least one of said digital coded interrogation signals for transmitting a signal containing said sensed critical body function, said patient transponder including; c. a set reset flip-flop circuit having high and low voltage output terminals, set and reset input terminals, d. a delay circuit coupled between said high voltage output terminal and said reset input terminal for providing a reset signal to said reset input after a predetermined time delay, e. means coupled to said set input terminal for causing a high output from said high voltage output terminal, f. means coupled to said sensing means and to said high voltage output terminal for causing the vital body information to be transmitted for the duration of the high output from said high voltage output terminal, g. means coupled to said low voltage output terminal and being responsive to a high output from said low voltage output terminal when said reset signal causes the high output to go low and the low output to go high for generating a trigger signal that will initiate the next sequentially coded signal by said interrogating and monitoring station to be transmitted.
Claim 2
Independent Claim
278 words
A system for automatically monitoring critical body functions of one or more ambulatory patients, the combination of: a. an interrogating and monitoring station operating on a fixed frequency having means for generating and transmitting a plurality of digital coded interrogating signals and having means for receiving and displaying critical body function information received in response to said transmitted signal, b. at least one patient transponder operating at said fixed frequency and having sensing means coupled to the patient for sensing at least one critical body function and being responsive to at least one of said digital coded interrogation signals for transmitting a signal containing said sensed critical body function, said patient transponder including; c. a set reset flip-flop circuit having high and low voltage output terminals, set and reset input terminals, d. a delay circuit coupled between said high voltage output terminal and said reset input terminal for providing a reset signal to said reset input after a predetermined time delay, e. means coupled to said set input terminal for causing a high output from said high voltage output terminal, f. means coupled to said sensing means and to said high voltage output terminal for causing the vital body information to be transmitted for the duration of the high output from said high voltage output terminal, g. means coupled to said low voltage output terminal and being responsive to a high output from said low voltage output terminal when said reset signal causes the high output to go low and the low output to go high for generating a trigger signal that will initiate the next sequentially coded signal by said interrogating and monitoring station to be transmitted.
Claim 3
Dependent Claim
22 words
The system of claim 1 wherein said interrogating and monitoring station includes digital means for sequentially interrogating of all the patient transponders.
Claim 4
Dependent Claim
115 words
The system of claim 1 wherein said means coupled to said low voltage output terminal includes: a multivibrator, first and second transistors connected in series with said multivibrator, means coupled to said first transistor and to said set-reset flip-flop circuit for biasing said first transistor in a conducting condition for the duration of the transmission of said vital body information and for a short predetermined time thereafter, said second transistor being coupled to the normally low voltage output terminal of said flip-flop and being responsive to the output of said flip-flop when its normally low voltage output goes high to turn on causing said multivibrator to be turned on until said second transistor becomes non-conducting.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |