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1. (WO1998017172) PATIENT MONITORING FINGER RING SENSOR

Pub. No.:    WO/1998/017172    International Application No.:    PCT/US1997/019205
Publication Date: Apr 30, 1998 International Filing Date: Oct 24, 1997
IPC: A61B 5/00
A61B 5/0205
A61B 5/021
A61B 5/024
A61B 5/026
Applicants: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Inventors: ASADA, Haruhiko, H.
YANG, Boo-Ho
KAI-YEUNG, Sunny, Siu
CHANG, Kuo, Wei
Title: PATIENT MONITORING FINGER RING SENSOR
Abstract:
A monitoring system for monitoring the health status of a patient and transmitting to a remote receiver a signal, based on measured physiological parameters. A sensor is incorporated in a finger ring or other article of apparel so as to monitor skin temperature, blood flow, blood constituent concentration, or pulse rate of the patient. The data are encoded for wireless transmission by mapping a numerical value associated with each datum to a pulse emitted after a delay of a specified duration following a fiducial time. Multiple ring bands and sensor elements may be employed for deriving three-dimensional dynamic characteristics of arteries and tissue of the finger.