Plethysmographic acceleration pulse wave meter
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United States of America Patent
Stats
-
Feb 21, 1984
Grant Date -
N/A
app pub date -
Nov 25, 1981
filing date -
Nov 29, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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