LI, Wenguang,LI, Qian,LERMAN, Justin Michael,BURGESS, David
申请号：
USUS2019/019247
公开号：
WO2019/165277A1
申请日:
2019.02.22
申请国别(地区):
US
年份:
2019
代理人:
摘要：
A method, device, and system for evaluating a vessel of a patient, and in particular the hemodynamic impact of a stenosis within the vessel of a patient. Proximal and distal pressure measurements are made using first and second instrument while the first instrument is moved longitudinally through the vessel from a first position to a second position and the second instrument remains in a fixed longitudinal position within the vessel. A series of pressure ratio values are calculated, and a pressure ratio curve is generated. One or more stepped change in the pressure ratio curve are then identified and/or located using an Automatic Step Detection (ASD) process and/or algorithm. The ASD includes identifying a general position of a starting point of the stepped change by identifying a change in the pressure ratio values within a first window along the pressure ratio curve that is at or above a first threshold change value, and identifying an optimized position of the starting point by identifying a change in the pressure ratio values within a second window along the pressure ratio curve that is at or above a second threshold change value, wherein the second window is smaller than the first window, and the second threshold change value is smaller than the first threshold change value.L'invention concerne un procédé, un dispositif et un système d'évaluation d'un vaisseau d'un patient, et en particulier de l'impact hémodynamique d'une sténose à l'intérieur du vaisseau d'un patient. Des mesures de pression proximale et distale sont effectuées à l'aide de premier et second instruments tandis que le premier instrument est déplacé longitudinalement à travers le vaisseau d'une première position à une seconde position et que le second instrument reste dans une position longitudinale fixe à l'intérieur du vaisseau. Une série de valeurs de rapport de pression sont calculées, et une courbe de rapport de pression est générée. Un ou plusieurs changements étagés de la courbe de rappor
