Surgery – Truss – Pad
Patent
1986-09-23
1988-09-06
Howell, Kyle L.
Surgery
Truss
Pad
128685, 1375133, A61B 502
Patent
active
047685182
ABSTRACT:
The invention relates to a pressure control system and apparatus for the cuff of an automatic blood pressure meter. Pressure reduction is adapted to be effected by using at least two constrictions (3) having a constant constriction, the selection and combination of such constrictions being performed by digitally controlled magnetic valves (4). Such magnetic valves are controlled by a microprocessor (6) depending on a measuring value provided by a sensor (7) for measuring the cuff pressure transition rate so as to obtain a desired, approximately linear rate of pressure reduction. The constrictors (3) comprise thin flexible tubes. The system is capable of compensating automatically for the changes caused in the desired volume air flow by the cuff size and tightness, variations in the circumference of a person's arm, the heartbeat density and pressure range.
REFERENCES:
patent: 3550582 (1970-12-01), Wilhelmson
patent: 3552385 (1971-01-01), Janssen
patent: 3633568 (1972-01-01), Hobel
patent: 3929129 (1975-12-01), Archambault
patent: 4130114 (1978-12-01), Peeler
patent: 4204545 (1980-05-01), Yamakoshi
patent: 4206764 (1980-06-01), Williams
patent: 4501280 (1985-02-01), Hood, Jr.
patent: 4587974 (1986-05-01), Link
patent: 4667672 (1987-05-01), Romanowski
Howell Kyle L.
Instrumentarium Corp.
Sykes Angela D.
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