Patent ID: 11963743
Assignee: COROVENTIS RESEARCH AB
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 23:
24. A system for determining microvascular resistance, Rmicro,rest, at rest condition in the myocardium perfused by a normal or a stenotic coronary artery of a human patient, comprising:
a processing unit;
a flow measuring system configured for measuring blood flow, Qrest, through the coronary artery during rest condition of the patient; and
a pressure measuring instrument configured for measuring the blood pressure, Pa,rest, at a position proximal in the coronary artery or proximally of any stenosis, if present, during rest condition of the patient;
wherein said processing unit is configured for obtaining the blood measurement Qrest from the flow measuring system, and obtaining the blood pressure measurement Pa,rest from the pressure measuring instrument, and wherein the processing unit is further configured for calculating the microvascular resistance at rest condition as Rmicro,rest=Pa,rest/Qrest.