Plethysmographic acceleration pulse wave meter

Details Plethysmographic acceleration pulse wave meter Plethysmographic acceleration pulse wave meter

1981-11-25

1984-02-21

Howell, Kyle L.

Surgery

Truss

Pad

128666, A61B 502

Patent

active

044323743

ABSTRACT:
A plethysmograph is provided with a sensor for detecting an increase or decrease in the blood volume of a vascular bed, preferably by photoelectrically detecting blood content in a finger-apex position. The detection signals derived from the sensor are twice or triply differentiated to produce an acceleration curve indicative of blood circulation whose interpretation effectively leads to a diagnosis of the entire circulatory system including early signs of malfunction. Detection of the presymptoms of arteriosclerosis, myocardial infarction, cerebral apoplexy, subarachnoidal hemorrhage, etc. is possible and the apparatus may be used to monitor the patient's condition during subsequent treatment. A visual or printed card of the diagnostic results can be provided.

REFERENCES:
patent: 3881481 (1975-05-01), Heule et al.
patent: 3920004 (1975-11-01), Nakayama
patent: 4105021 (1978-08-01), Williams et al.
patent: 4137910 (1979-02-01), Murphy
patent: 4154238 (1979-05-01), Link
patent: 4301809 (1981-11-01), Pinchak
Devi, V. L. et al., "A Processing System for Automatic On-Line Determination of LVET", Changes in Health Care Instrumentation Due to UP Technology, Conf: Proc. of the IFIP-IMIA Rome, Italy (Feb. 6-8, 1980) pp. 167-173.

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