Medsolve Limited;Imperial College of Science, Technology and Medicine;Volcano Corporation
发明人:
申请号：
EP19184312.7
公开号：
EP3581102A1
申请日:
2012.08.20
申请国别(地区):
EP
年份:
2019
代理人:
摘要：
A processing unit and systems are disclosed for assessing the severity of a stenosis in a vessel without administration of hyperemic agent. At least one instrument sized and shaped for introduction into the vessel of the patient is in communication with the processing unit, wherein the processing unit is configured to: obtain proximal pressure measurements for at least one cardiac cycle of the patient from the at least one instrument at a position proximal of the stenosis of the vessel； obtain distal pressure measurements for the at least one cardiac cycle of the patient from the at least one instrument at a position distal of the stenosis of the vessel； define a duration of a diagnostic window within the cardiac cycle of the patient by selecting a starting point and an end point, wherein the starting point is selected based on a peak pressure of the proximal or distal pressure measurements； and calculate a pressure ratio between the distal pressure measurements and the proximal pressure measurements obtained during the diagnostic window.
