Patent ID: 9662051
Date: 2017-05-30
CPC Classifications: A61B

Claim:
1. An automated method of assessing a peripheral vascular condition of a patient, the method comprising, under the control of a computing device: applying pressure to a limb or digit of the patient sufficient to cease blood flow to the limb or digit distal to the applied pressure; using a pulse oximeter distal to the applied pressure to generate a plurality of pulse oximeter parameters relative to the limb or digit of the patient, wherein the plurality of pulse oximeter parameters comprises a perfusion index, oxygen saturation, and a volumetric pulse waveform; while increasing or decreasing the pressure applied to the limb or digit, determining a change in each of the plurality of pulse oximeter parameters indicative of a cessation of blood flow or a return of blood flow in the limb or digit; determining a systolic blood pressure in the limb or digit based on the pressure applied at the time of cessation of blood flow or the return of blood flow in the limb or digit as determined by the change in each of the pulse oximeter parameters; and assessing the peripheral vascular condition of the patient based on the systolic blood pressure determined in the limb or digit.