Surgery – Diagnostic testing – Measuring or detecting nonradioactive constituent of body...
Patent
1997-03-07
1998-10-27
Nasser, Robert L.
Surgery
Diagnostic testing
Measuring or detecting nonradioactive constituent of body...
600323, 600335, A61B 500
Patent
active
058271813
ABSTRACT:
A noninvasive blood chemistry measurement method and system isolate measurement contributions due to a patient's blood to accurately measure blood chemistry. In accordance with a first preferred embodiment of the present invention a noninvasive blood chemistry measurement method decreases the blood volume within a patient's body part relative to the normal blood volume in the body part and performs a baseline measurement. Blood volume is then increased and a second measurement is performed. Comparison of the second measurement to the baseline measurement isolates the measurement attributes of the patient's blood. In accordance with a second preferred embodiment of the present invention a noninvasive blood chemistry measurement system decreases blood volume by applying mechanical pressure to a body part. In accordance with a third preferred embodiment of the present invention, blood volume in the body part is decreased using a pressure cuff. In a fourth embodiment, a noninvasive probe accurately measures blood chemistry and uses a suction cup to increase blood volume at the blood chemistry measurement site.
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Dias J. Fleming
Mauze Ganapati R.
Hewlett-Packard Co.
Imperato John L.
Nasser Robert L.
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