Blood pressure and heart rate monitoring method and apparatus
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United States of America Patent
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Nov 6, 1990
Issued Date -
N/A
app pub date -
Jun 15, 1988
filing date -
Jun 15, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Improved ambulatory blood pressure and heart rate monitoring and recording apparatus and method are described. The apparatus uses an auscultatory transducer connected to a microprocessor-based circuit for sensing, validating and recording systolic and diastolic pressure in the cuff-surrounded limb of the patient, and for measuring heart rate. The improved method calculates, and records in the same blood pressure and heart rate data record, an alphanumeric figure of merit, or alternatively a numeric quality index, based upon Korotkoff sound frequency and amplitude criteria. In another improved method, the maximum pressure to which the cuff is pressurized for each measurement is made to track the individual patient's systolic blood pressure to ensure reliable blood pressure readings without unneccessary constriction of the patient's limb.
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