Automatic blood pressure monitor having reduced data loss...

Details Automatic blood pressure monitor having reduced data loss... Automatic blood pressure monitor having reduced data loss...

A - Human Necessities

61

B

A61B 5/0225 (2006.01)

Patent

CA 2114070

-21- Abstract of the Disclosure AUTOMATIC BLOOD PRESSURE MONITOR HAVING REDUCED DATA LOSS SENSITIVITY TO CUFF PRESSURE CHANGES An automatic blood pressure monitor having a blood pressure cuff, an air pump applying pressurized air to the cuff, an air valve selectivelyventing the cuff, and a pressure transducer generating an output signal having a D.C. component indicative of the steady-state pressure in the cuff, and an A.C. component indicative of oscillometric pulses. The pressure transducer output is amplified and applied to an analog-to-digital converter which generates a digital word indicative of the steady-state cuff pressure. The amplified pressure transducer output is also applied to one input of a differential amplifier having an output that is applied to an analog-to-digital converter having a limited operating range. The other input of the amplifier receives an offset signal from a voltage source to offset the amplified pressure transducer output so that the output of the differential amplifier willnot exceed the operating range of the analog-to-digital converter.

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