Arterial distensibility measuring apparatus

Details Arterial distensibility measuring apparatus Arterial distensibility measuring apparatus

1990-05-09

1992-03-17

Howell, Kyle L.

Surgery

Truss

Pad

128677, 128680, A61B 502

Patent

active

050959123

ABSTRACT:
An arterial distensibility can be measured by putting a cuff with a blood flow shutting bag on an upper arm. The arterial distensibility E can be measured by measuring a shut blood flow critical pressure Pc, a diastolic pressure Pf at the upper arm and a crest value h of a pulse wave transmitted to the upper arm by the expression E-h/(Pc-Pf). The cuff has a forward bag, a central bag and a rear bag. The forward bag functions as a blood flow shutting bag. A pressure change in the forward bag is detected by a forward sensor, and a pressure change in the rear bag is detected by a rear sensor. Based on these detected values, the shut blood flow critical pressure Pc, diastolic pressure Pf and the crest h are given.

REFERENCES:
Medical and Biological Engineering and Computing, vol. 21, No. 4, Jul. 1983, Stevenage GB, pp. 424-429; Chai et al.
"Noninvasive Determination of Arterial Compliance" Clinical Science, vol. 56, No. 5, 1979, GB pp. 413-417; Gribbin et al.
"Arterial Distensibility in Normal and Hypertensive Man."
Medical and Biological Engineering and Computing, vol. 23, No. 1, Jan. 1985, Stevenage GB, pp. 43-47; Shimazu et al.
"Noninvasive Measurement of Beat-to-Beat Vascular Viscoelastic Properties in Human Fingers and Forearms".

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