Non-invasive method for the in vivo determination of the oxygen

Details Non-invasive method for the in vivo determination of the oxygen Non-invasive method for the in vivo determination of the oxygen

1994-01-21

1995-05-09

Sykes, Angela D.

Surgery

Truss

Pad

128664, 128665, 128666, A61B 500

Patent

active

054131006

ABSTRACT:
The apparatus comprises three laser diodes emitting at 660, 750 and 940 nm respectively, excited cyclically at the rate of a timer. The light emitted is channelled by three optical fibers to traverse a fully-vascularized tissue region of a subject along three virtually merged optical paths, and to terminate at an opto-electronic sensor, which generates overlapping signals representative of the molecular absorption. The pulsation of the arterial blood in the region induces variable components which are exclusively a function of the molecular absorptions due to oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin. The signals are switched by gates on three channels where the variable components are picked up and digitized, and then processed in a microprocessor to yield the oxygen saturation SaO.sub.2 and the carbon monoxide fixation of the hemoglobin.

REFERENCES:
patent: 4562843 (1986-01-01), Djordjevich et al.
patent: 4846189 (1989-07-01), Sun
patent: 5111817 (1992-05-01), Clark et al.
patent: 5152296 (1992-10-01), Simons
"Identification of Vascular Viscoelastic Property Using Adaptive Filter Technique" Nishimura et al., 29th Conference of Japan Society of Medical Electronics & Biological Engineering, May 10th, 1990.
A. Kawarada et al., "Noninvasive Automatic Measurement of Arterial Elasticity in Human Finger and Rabbit Forelegs Using Photoelectric Plethysmography", Medical & Biological Engineering & Computing, vol. 24, No. 6, Nov. 1986, pp. 591-596.
H. Shimazu et al., "Noninvasive Measurement of Frequency Characteristics of Arterial Elastic Modulus in Human Fingers", Proceedings of 26th Conference of Japan Society of Medical Electronics & Biological Engineering Apr. 1-3, 1987, p. 213.

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