SYSTEM FOR MEASURING INDEX OF MICROCIRCULATORY RESISTANCE AND CORONARY ARTERY ANALYSIS SYSTEM

摘要

Disclosed are a system for measuring index of microcirculatory resistance and a coronary artery analysis system comprising same. The system for measuring index of microcirculatory resistance comprises: a three-dimensional modeling device (100), an invasive blood pressure sensor (200) and an IMR measurement device (300); the IMR measurement device (300) being connected with the three-dimensional modeling device (100) and the invasive blood pressure sensor (200); the three-dimensional modeling device (100) is used for reading coronary angiography images, measuring the length (L)of blood vessels in the heartbeat cycle region, and obtaining the three-dimensional structure of the coronary artery by means of three-dimensional modeling; the invasive blood pressure sensor (200) being used for measuring coronary inlet pressure (Pa); and the IMR measuring device (300) is used for measuring a pressure drop (ΔP)and a blood flow velocity (Vh) from the coronary inlet to a distal end of coronary stenosis in a maximum congestion state of the vessel, so as to calculate index of microcirculatory resistance (IMR): IMR = (Pa-ΔPi) × L / Vh. The system does not need to pass through the distal end of coronary stenosis, thus reducing the difficulty and risk of surgery. Moreover, the IMR measurement is realized through angiography images and the operation is simple.