Surgery – Diagnostic testing – Cardiovascular
Patent
1996-11-14
1999-02-09
Nasser, Robert L.
Surgery
Diagnostic testing
Cardiovascular
600495, 600500, A61B 500
Patent
active
058686797
ABSTRACT:
A blood pressure monitor apparatus for monitoring a blood pressure of a living subject, by changing a pressing pressure of an inflatable cuff being wound around a body portion of a living subject, including a cuff-pressure regulating device which iteratively changes the pressure of the cuff within a predetermined range whose upper limit is lower than a mean blood pressure of the subject, a pulse-wave sensor which detects an amplitude of each of a plurality of heartbeat-synchronous pulses of a pulse wave which is produced in the cuff when the pressure of the cuff is changed within the predetermined range by the regulating device, a characteristic determining device for determining a characteristic value relating to an envelope of the pulse amplitudes detected by the pulse-wave sensor during each of the iterative cuff-pressure changes within the predetermined range, and a identifying device for identifying an abnormal decrease of the blood pressure of the subject based on the characteristic value determined by the characteristic determining device.
REFERENCES:
patent: 4699152 (1987-10-01), Link
patent: 4718427 (1988-01-01), Russell
patent: 5279303 (1994-01-01), Kawamura et al.
patent: 5590649 (1997-01-01), Caro et al.
Colin Corporation
Nasser Robert L.
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