METHOD FOR ENDOVASCULAR DETERMINATION OF FUNCTIONAL SIGNIFICANCE OF CONSTRICTIVE LESIONS OF RENAL ARTERIES IN PATIENTS SUFFERING FROM RENOVASCULAR HYPERTENSION Russian patent published in 2014 - IPC A61B6/02 

FIELD: medicine.

SUBSTANCE: first stage involves a puncture of the right femoral artery, or the right radial artery according to the Seldinger's procedure; a mouth of the target renal artery is catheterised with the Jadkins right 5F or 6F angiographic catheter. At the second stage, the renal artery angiography aims at localising the stenosis. At the third stage, blood pressure is measured in the distal direction of the renal artery stenosis and in a segment of the renal artery to the stenosis either in the aorta free from an injury that requires a coronary conductor for pressure measurement connection to a measuring apparatus for functional flow reserve (FFR), the conductor is brought along the conductor catheter into a lumen of the renal artery in the distal direction from the stenosis. The blood pressure values are measured in the distal direction from the renal artery stenosis and in the renal artery segment to the stenosis free from the injury, an FFR value is determined to observe a relation of the stenosis maximum blood flow to the stenosis-free maximum blood flow. If the FFR is no more than 0.75, a stenting procedure is considered to be indicated; while the FFR value being more than 0.80 requires drug-induced therapy to be indicated; if the FFR value falls within the range of 0.76-0.80, the therapeutic approach is specified taking into account the clinical findings, the complaints nature and the additional non-invasive findings.

EFFECT: method enables providing more objective and accurate method by measuring the blood flow both from the stenosis, and normally.

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