METHOD FOR SELECTING THE TYPE OF EXTRA-INTRACRANIAL SHUNT BY THROUGHPUT CAPACITY IN ACUTE AND CHRONIC CEREBROVASCULAR PATHOLOGIES REQUIRING REVASCULARISING INTERVENTION Russian patent published in 2022 - IPC A61B5/02 

FIELD: medicine.

SUBSTANCE: invention relates to the field of medicine, namely, to neurosurgery and vascular surgery. The following macro- and microhaemodynamics indicators are measured: minute blood volume Q_MBV, ml/min or cm³/min; volumetric blood flow rate in the common carotid artery (CCA) on the ipsilateral side of the perfusion deficiency zone Q_CCA, ml/min or cm³/min; volumetric blood flow rate in the sphenoidal segment of the middle cerebral artery on the ipsilateral side of the perfusion deficiency zone Q_M1, ml/min or cm³/min; volumetric blood flow rate in the middle cerebral artery territory on the contralateral side of the perfusion deficiency zone, ml/min/100 g or cm³/min/100 g. The resulting value is then recalculated by multiplying by a coefficient depending on sex and age, resulting in the value Q_CBF in ml/min/MCA or cm³/min/MCA. The required volumetric blood flow in the shunt Q_s, ml/min or cm³/min, is then determined based on the original formulas. If Q_s ≤ 10 ml/min or cm³/min, the shunt is not used. If 10 < Q_s ≤ 50 ml/min or cm³/min, a low-flow shunt with a volumetric blood flow rate ≤ 50 ml/min or cm³/min is used. If 50 < Q_s ≤ 100 ml/min or cm³/min, a medium-flow shunt with a corresponding volumetric blood flow rate is used. If Q_s > 100 ml/min or cm³/min, a high-flow shunt with a volumetric blood flow rate > 100 ml/min or cm³/min is used.

EFFECT: possibility of determining the required volumetric blood flow rate (VBFR) in an extra-intracranial shunt (EICS) and selecting a shunt with such a throughput capacity that maintains the adequate values of the volumetric rate of cerebral blood flow (CBF) in the MCA territory where perfusion deficiency was initially determined.

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