Telemetry system for monitoring hospital patient temperature

Details Telemetry system for monitoring hospital patient temperature Telemetry system for monitoring hospital patient temperature

A - Human Necessities

61

B

340/102, 326/12.

A61B 5/00 (2006.01) G01K 1/02 (2006.01) G01K 7/24 (2006.01) G01K 13/00 (2006.01)

Patent

CA 1158319

TELEMETRY SYSTEM FOR MONITORING HOSPITAL PATIENT TEMPERATURE ABSTRACT Hospital patient temperatures are monitored by providing each patient with a battery powered transmitter containing a thermister and reference resistor which is positioned over the patient's carotid artery. A receiver, carried by a nurse, includes an actuator for closing a reed switch in a transmitter near which it is positioned to activate that transmitter. Upon actuation of the transmitter, the patient's temperature varies the duty cycle of a high frequency transmitter output. The outputs of a number of transmitters, each associated with a different patient are elicited, one by one, and monitored by the receiver which contains a demod- ulator connected to a microprocessor coupled to a visual disply. The microprocessor calculates patient temperature selectively in Fahrenheit and Centigrade conventions. The microprocessor also detects low battery condition in the transmitter. The receiver includes a self-calibration test and low battery indication circuits. -1-

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