Apparatus for heating tissue with a photoplethysmograph sensor

Details Apparatus for heating tissue with a photoplethysmograph sensor Apparatus for heating tissue with a photoplethysmograph sensor

1990-08-23

1992-10-27

Howell, Kyle L.

Surgery

Truss

Pad

356 41, 128666, A61B 500

Patent

active

051580829

ABSTRACT:
A method and apparatus for increasing the blood flow in a patient's tissue by warming the tissue with heat generated by a semiconductor device mounted in a sensor. The amount of heat generated is controlled by varying either the magnitude or the duty cycle of the current that flows through the semiconductor device, with the amount of heat required determined by either the temperature of the sensor's contact surface or the operating performance of the apparatus.

REFERENCES:
patent: 4259963 (1981-04-01), Huch
patent: 4714080 (1987-12-01), Edgar, Jr. et al.
patent: 4723554 (1988-02-01), Oman et al.
patent: 4926867 (1990-05-01), Kanda et al.
patent: 5007423 (1991-04-01), Branstetter et al.
Mendelson et al., "Nonivasive Pulse Oximetry Utilizing Skin Reflectance Photoplethysmography," IEEE Transactions of Biomedical Engineering, Oct. 1988, pp. 798-805.
Noninvasive Pulse Oximetry Utilizing Skin Reflectance Photoplethysmography, IEEE Transactions on Biomedical Engineering, vol. 35, No. 10, Oct. 1988, Yitzhak Mendelson and Burt D. Ochs.

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