METHOD OF DETERMINING FEMORAL-TIBIAL RECONSTRUCTION OPERATION AFTER SHUNTING OPERATIONS Russian patent published in 2016 - IPC A61B8/06 

FIELD: medicine.

SUBSTANCE: invention relates to cardiovascular surgery, and can be used for determination of operation of a femoropopliteal tibial reconstruction after shunting operations. Postoperative period involves duplex scanning of shunt, inflow and outflow paths, area of proximal and distal anastomoses. When using doppler modes value of doppler angle relative to axis of the vessel to be in the range up to 60 degrees. Control volume, the size of which is equal to 2/3 of the vessel diameter is placed in the centre of vessel. Determined S - peak systolic velocity, D - end-diastolic velocity, S/D - systolic-diastolic ratio, peripheral resistance indices: PI - Gosling and pulsation index, RI - Purselo resistivity index; V - volumetric blood flow, ABI - ankle-brachial index. Normal functioning of reconstruction is determined by S - 50-120 cm/s, D - 10-20 cm/s, S/D - 5-10, PI - 4-10, RI - 0.6 -1.0, V more than 450-520 mL/min, ABI more than 0.8-1.0, increase of ABI in dynamics, blood flow-type - main or main changed. If reconstruction is added with unloading arteriovenous fistula, normal functioning of reconstruction is determined by S - 150-180 cm/s, D - 50-80 cm/s, S/D - 2-2.5, RI - 0.5-0.6, PI - 1.1-1.2, V - 500-600 ml/min, ABI - 0.8, blood flow-type - main changed. Predictors of reconstruction thrombosis are determined at S more than 250 cm/s, D 100 cm/s, ratio S proximal stenosis /S in the distal place stenosis, equal to 2-3; S/D equal to 2-2.1, PI 0.8-1.0, RI 0.4-0.5, ABI less than 0.7-0.8, V is less than 220-250 mL/min, change of blood flow on the main changed or a collateral type.

EFFECT: method enables the early detection of critical parameters of blood flow in shunt, preventing its thrombosis due to development of ultrasonic criteria of its normal and pathological functioning.

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