Systolic pressure determining apparatus and process using integr

Details Systolic pressure determining apparatus and process using integr Systolic pressure determining apparatus and process using integr

1976-12-27

1979-02-20

Michell, Robert W.

Surgery

Truss

Perineal

128 205M, A61B 502

Patent

active

041401107

ABSTRACT:
In systolic pressure determining apparatus utilizing a pressure cuff and means for measuring a fluctuating quantity proportional to the sum of the cuff pressure and the fluctuating component proportioned to the pulsatile blood pressure, and including means for determining the maximum value of the fluctuating component as cuff pressure is varied, the improvement comprising means for converting the quantity into a representation of a time derivative of the fluctuating component means for obtaining the time integral of the time derivative over an interval of predetermined limits between initiation of systolic rise and systolic peak in each blood pressure pulse, and means extending the time integral, as a measure of pulse pressure amplitude, to the maximum value determining means. Specifically, certain crossings of a reference value by the time derivative are recognized as being the initiation of systolic rise and the systolic peak respectively, and the integration occurs over this interval.
The method implemented by the improved means also comprises an aspect of the invention.

REFERENCES:
patent: 3598112 (1971-08-01), Figar
patent: 3835840 (1974-09-01), Mount
patent: 3871360 (1975-03-01), Van Horn et al.
patent: 3878833 (1975-04-01), Arneson et al.
patent: 3996925 (1976-12-01), Djordjevich
patent: 4009709 (1977-03-01), Link et al.
patent: 4035622 (1977-07-01), Obermajer

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