A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
73/101, 349/36,
A61B 5/02 (2006.01) A61B 5/022 (2006.01) A61B 5/0456 (2006.01) G06F 17/00 (2006.01)
Patent
CA 1163327
Automated Blood Pressure Measurement During Physical Exercise Abstract An inflatable blood pressure cuff is volumetrically contiguous with a reservoir, and has a microphone mounted on the inside cuff surface. Electrocardiograph signals are obtained, and the cuff is first inflated, then incre- mentally deflated. At each pressure increment, and for a number of heart beats dependent on the subject's heart rate, data acquisition is gated based on cardiac R-waves. In particular, a first plurality of microphone signal samples are taken, approximately about the R-wave occur- rence, and a second, larger and subsequent plurality is also taken. Sample combination techniques yield indices respectively representing noise and signal plus noise, and at least at the first instance when signal exceeds noise by a specified amount, a Korotkoff sound is deemed to have occurred, and systolic pressure is identified. Subsequent deflation and similar processing is utilized to detect diastolic pressure, which occurs when the Korotkoff sounds decrease rapidly or substantially cease.
364432
Critikon Company L.l.c.
Swabey Ogilvy Renault
LandOfFree
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