Digital watch/infrared plethysmograph having a removable pulse s

Details Digital watch/infrared plethysmograph having a removable pulse s Digital watch/infrared plethysmograph having a removable pulse s

1979-05-16

1981-07-28

Michell, Robert W.

Surgery

Truss

Pad

A61B 502

Patent

active

042805066

ABSTRACT:
A digital watch having a face mounted detachable pulse sensor unit coupled to infrared plethysmograph electronics within the watch. The pulse sensor unit is detachable from a receptacle on the watch face and mountable into a receptacle at a first end of a remote pulse sensing cable. The second end of the cable is connected into the watch receptacle for conveying the pulse sensing information to the infrared electronics. A cuff holds the pulse sensor unit in place against the wearer's finger for sampling his heartbeat. The wearer may thus monitor his pulse rate while both hands are free.

REFERENCES:
patent: 3646931 (1972-03-01), Phelps et al.
patent: 3742938 (1973-07-01), Stern
patent: 4129124 (1978-12-01), Thalmann
patent: 4163447 (1979-08-01), Orr
patent: 4185621 (1980-01-01), Morrow
Anon., "IR Sensor Built into Watch Measures the Wearer's PR," Electronics, vol. 5, No. 9, Apr. 28, 1977, pp. 32, 34.
Anon., "LCD Watch Doubles as a Heart Monitor," Electronics, Mar. 1, 1979, pp. 42-43.

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