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The PIESOMETER Mk-1 measures systolic and diastolic blood pressure and heart rate using adaptive interference cancellation (signal processing) technologies. The system employs three acoustic sensors (i.e. microphones) in the electronic pressure cuff. During a blood pressure measurement, two acoustic sensors are placed in the traditional location on the patient's biceps. This set of sensors, operating much like a conventional stethoscope, senses the korotkoff sounds. Unique to the PIESOMETER MK-1 is a second set of a sensor placed in the triceps area. This sensor serves to detect any interference signals that would normally compromise the reading. This allows reading to be taken even in noise and vibration intensive environment.
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This technology functions by identifying signals lying within the audio frequency and filtering out the interference signal, The CANAMET PIESOMETER is protected by U.S. Patent 6,520,918. Blood pressure measurement determined with this device are equivalent to those obtained by a trained observer using the cuff/stethoscope auscultatory method, within the limits prescribed by the American National Standard SP10:2002. The device is used to provide data to qualified medical personnel for the purpose of assessing the patient's cardiac health via blood pressure readings taken during daily activity for up to a 48-hour period.
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