Antoine MERLOT,David CAMPO,Virginie VISSAC,Haïkel BALTI
申请号：
US16480433
公开号：
US20190387987A1
申请日:
2018.03.13
申请国别(地区):
US
年份:
2019
代理人:
摘要：
A method to collect cardiovascular data relating to an individual user (U), in a system comprising an acoustic sensor (4) configured to be coupled to the chest of the user, an arm band (2) having an inflatable bladder (53) configured to be placed around at a predefined position around a upper limb of the user, for example the left arm (BG), a pneumatic unit with at least a pump (7) and a pressure sensor (61), configured to inflate and deflate the inflatable bladder, an arterial blood path (P) being defined from the heart to the left arm (BG) of the user,the method comprising a set of steps named PTT procedure: /A1/-acquiring acoustic signals at the acoustic sensor, /A2/-acquiring pressure signals at the pressure sensor, representative of pressure occurring at the brachial artery, /S0/-inflate the bladder at a predetermined pressure (PT1) /S1/-determining aortic valve closing instant T1(k) from acoustic signals, /S2/-determining subsequently, from pressure signals, a characteristic point (M2) of the pressure signal curve occurring at instant T2(k), /S3/-calculate a time difference, defined as Δ；T(k)=T2(k)−；T1(k) Repeating, for each heartbeat, steps S1 to S3 until a stop criterion(SC) is met.
