Patent ID: 7052465
Filing Date: 2006-05-30
Classification: A61B

Abstract:
1. A method for monitoring blood pressure of a patient under high motion conditions, comprising: securing a sensor assembly to a monitoring site on an anatomical structure of the patient from which noninvasive monitoring of blood pressure may be performed, the sensor assembly having a sensor with a main pressure channel and a reference pressure channel; applying the sensor to the monitoring site with a varying holddown force over a plurality of sequential cycles comprising an initial sequence of a predetermined number of cycles and a subsequent sequence; attempting to maintain low motion conditions over the initial sequence of the applying step; acquiring main waveform data from the main pressure channel and reference waveform data from the reference pressure channel during the applying step; monitoring at least one of the main waveform data and the reference waveform data to detect a fault in the initial sequence of the applying step; monitoring a user-activated restart control to detect a restart signal during the initial sequence of the applying step; and when no fault is detected in the waveform data monitoring step, and when no restart signal is detected in the reset control monitoring step, calculating blood pressure from the main and reference waveform data acquired in the subsequent sequence of the applying step and from at least one cycle of the initial sequence after filtration thereof with respective high pass filters, an adaptive noise canceller, and an adaptive linear predictor.