DR. ANDREW KAGAN, M.D.
Radiology in Hackensack, NJ

5443072, Aug 22, 1995

Jan 21, 1994

8/184690

Andrew Kagan - Hackensack NJ
Gerald P. Selden - Blairstown NJ
James C. Wickstead - Mendham NJ

A61B 50265

128691

A small, lightweight, disposable blood flow monitor adhered directly to the skin of a patient above the vessel being monitored, such as an artery. A transducer generates an electric signal representative of a deflection of a vessel wall due to pulsatile pressure, which deflection is enhanced by a thin conductive substrate providing a mechanical advantage for the detected deflection. Control circuitry periodically stores a peak value of a deflection caused by a systolic pulse. A reference value is obtained by pressing a calibrate switch to store a value representing a systolic pulse encountered during a calibration interval. Peak values of systolic pulses are stored at predetermined intervals and compared with the reference value. A simplified display, preferably comprised of LEDs of different colors respectively represent a normal, slightly abnormal and significantly more abnormal conditions. The monitor, once turned on, remains on throughout its useful operating life.