Patent ID: 9375150
Filing Date: 2016-06-28
CPC Classification: A61B

Claim Text:
1. A method for evaluating whether an oscillometric signal representative of pressure oscillations in the vasculature of a patient is associated with special conditions, said method comprising: obtaining, from a blood pressure cuff, an oscillometric signal at a location on an extremity of the patient; determining, using a processor, a ratio using a value associated with a first frequency component of the oscillometric signal and a value associated with a second frequency component of the oscillometric signal; comparing, using the processor, the ratio to a threshold value; associating, using the processor, a first diagnostic class from a plurality of diagnostic classes with the oscillometric signal when a first outcome of the comparison to the threshold value results from said comparing the ratio to a threshold value; associating, using the processor, a second diagnostic class from a plurality of diagnostic classes with the oscillometric signal when a second outcome of the comparison to the threshold value results from said comparing the ratio to a threshold value, wherein the first diagnostic class is characterized as the patient having a first severity of peripheral arterial disease and the second diagnostic class is characterized as the patient having a second severity of peripheral arterial disease; selecting, using the processor, a characteristic ratio based on the diagnostic class associated with the oscillometric signal; applying, using the processor, the characteristic ratio to a maximum amplitude of the oscillometric signal to determine an adjusted amplitude value of the oscillometric signal; and correlating, using the processor, the adjusted amplitude value of the oscillometric signal to a pressure in the blood pressure cuff to determine an indicated blood pressure value for the patient.