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1. (WO2018086766) CONTACTLESS BLOOD PRESSURE MONITORING

Pub. No.:    WO/2018/086766    International Application No.:    PCT/EP2017/062425
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Wed May 24 01:59:59 CEST 2017
IPC: A61B 5/021
A61B 5/024
A61B 5/026
A61B 5/107
Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION
IBM UNITED KINGDOM LIMITED
Inventors: JENNEY, Eric
DRAEGER, David, Robert
VASQUEZ, John, Donald
Title: CONTACTLESS BLOOD PRESSURE MONITORING
Abstract:
Contactless blood pressure monitoring, includes: illuminating a blood vessel of a patient with infrared ('IR') light; receiving, by an IR camera through a polarizing filter, IR light reflected by the patient; capturing at a time based on a heartrate of the patient, a first IR image of the blood vessel of the patient when the blood vessel is distended; determining, from the first image, a maximum diameter of the blood vessel; capturing at a time based on the heartrate of the patient,, a second IR image of the blood vessel of the patient when the blood vessel is contracted; determining, from the second IR image, a minimum diameter of the blood vessel; and calculating blood pressure of the patient in dependence upon the maximum and minimum diameters of the blood vessel.