FIELD: medicine, neurosurgery.
SUBSTANCE: one should measure blood pressure in afferent vessel of cerebral arteriovenous malformation (AVM). If measured pressure is above that of functionally insignificant vessel being 25% against systemic arterial pressure for AVM at blood flow of 1000 ml/min and 50% for AVM at blood flow of 500 ml/min one should conclude the vessel to be functionally valuable. The method enables to decrease complications due to increased reliability in detecting functional value of ABM-supplying vessels.
EFFECT: higher efficiency of detection.
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