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Blood Pressure Measuring

IP.com Disclosure Number: IPCOM000095295D
Original Publication Date: 1965-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Fiegel, LJ: AUTHOR

Abstract

Strain gauge 10 measures total cuff pressure. It develops a signal consisting of a large slowly varying component and small pulses caused by arterial expansion. DC amplifier 15 amplifies and inverts the signal for the A-to-D conversion.

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Blood Pressure Measuring

Strain gauge 10 measures total cuff pressure. It develops a signal consisting of a large slowly varying component and small pulses caused by arterial expansion. DC amplifier 15 amplifies and inverts the signal for the A-to-D conversion.

Preamplifier 20 filters out the slowly varying component and amplifies the small pulses which are passed to modifier 25. The latter is manually adjustable to change the pulse height of the input to pulse amplifier 30. This provides a signal for starting A-to-D converter 35. Such converts the analog input signal from 15 to a digital value.

Heretofore, it was the practice to use a transducer in addition to the strain gauge which was operable by the air system and the arterial expansion to develop the small pulses for controlling the A-to-D conversion.

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