Patent ID: 8740802
Filing Date: 2014-06-03
Classification: A61B

Abstract:
1. A system for measuring a blood pressure value from a patient, comprising: (a) a first sensor configured to generate a first time-dependent waveform indicative of one or more contractile properties of the patient's heart; (b) a second sensor configured to generate a second time-dependent waveform indicative of one or more contractile properties of the patient's heart; (c) a third sensor comprising an inflatable cuff configured to attach to the patient's arm, a pneumatic system configured to inflate and deflate the inflatable cuff, a pressure sensor, an analog-to-digital converter, a first microprocessor, a first serial transceiver, and a battery, the third sensor configured to generate a third time-dependent waveform indicative of pressure measured by the pressure sensor during inflation of the cuff, wherein heartbeat-induced pulses are indicated in the third time dependent waveform by variations in the measured pressure; and (d) a processing component configured to be worn on the patient's body and comprising a second microprocessor and a second serial transceiver, the processing component programmed to: calculate continuous systolic, diastolic, and mean arterial blood pressures from the pulse transit time, the calibration values, the systolic and diastolic ratios, and the patient-specific slope value.