Surgery – Truss – Pad
Patent
1989-05-01
1990-09-04
Hindenburg, Max
Surgery
Truss
Pad
128680, 128681, A61B 502
Patent
active
049535579
ABSTRACT:
A monitor for the automated non-invasive measurement of a patient's blood pressure comprising apparatus for automatically inflating and deflating a cuff which is to be applied around a patient's extremity, first and second pressure sensors coupled to the airway of said cuff, each providing an electronic signal indicative of cuff pressure, and a processor responding to the signals obtained by said pressure sensors for stopping the inflation of the cuff when a maximum cuff pressure is reached, and for calculating the blood pressure from the oscillations of the pressure signal. A memory is connected to said processor in which calibration values indicating the pressure related to the electronic signals provided by each of said two pressure sensors are stored. The processor is adapted to access and compare those calibration values which correspond to the actual values of said electronic signals provided by said two sensors to monitor supply and/or reference voltages, and to cause the deflation of the cuff when the actual calibration values differ from each other or the supply and/or reference voltages each differ from a related predetermined value more than a predetermined amount, thus preventing any pressure raise over predetermined limits in case of any malfunction of the monitor without the use of mechanical pressure switches.
REFERENCES:
patent: 2865365 (1958-12-01), Newland et al.
patent: 4005701 (1977-02-01), Aisenberg et al.
patent: 4658829 (1987-04-01), Wallace
patent: 4800892 (1989-01-01), Perry et al.
Frankenreiter Michael
Rometsch Rainer
Seher Jens-Peter
Hewlett--Packard Company
Hindenburg Max
Lacyk J. P.
Schuette Richard F.
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