Automatic blood pressure monitor employing artifact...

Details Automatic blood pressure monitor employing artifact... Automatic blood pressure monitor employing artifact...

A - Human Necessities

61

B

A61B 5/0225 (2006.01)

Patent

CA 2101674

AUTOMATIC BLOOD PRESSURE MONITOR EMPLOYING ARTIFACT REJECTION METHOD AND APPARATUS Abstract of the Disclosure A blood pressure monitor capable of measuring blood pressure in the presence of artifact. One embodiment of the blood pressure monitor uses a detector to generate a trigger signal on the occurrence of the R-wave or other point on the ECG waveform. Oscillometric waveform samples taken at the same time after each trigger signal are then summed with each other over many heartbeats to generate an average oscillometic waveform that is used to determine blood pressure by conventional means. Another embodiment of the blood pressure monitor stores oscillometric waveform samples over many heartbeats. The monitor then assumes that the period of the heartbeat has a variety of durations, and it derives respective sets of composite samples by summing the stored samples having the same temporal relationship to the start of each assumed period. The set of composite samples corresponding the a waveform that best matches an actual oscillometric wave is then used to determine blood pressure by conventional means.

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