Abstract
Fifteen patients with occlusive lesion of major cerebral arteries underwent STA-MCA bypass operation.
Intraarterial pressure of the cortical artery of middle cerebral artery was measured by the canulation method. A 19 gauge tube is canulated into one STA and connected to a transducer. Antegrade middle cerebral artery pressure and retrograde middle cerebral artery pressure were recorded by the method of clipping of distal and proximal part of the middle cerebral artery.
As shown in Table 1, post operative improvement of neurological deficit was excellent in cases which showed the pressure above 40mmHg. In cases which did not improve after operation, even if the intra-arterial pressure over 40mmHg, occlusive lesion was at the origin of the middle cerebral artery or coexistent embolus was found on pre-operative angiogram.
The pattern and its degree of the collateral circulation are variable in cases by case, but, these pressure measurement revealed the expected functional capacity of the collateral circulation, the degree of development of the collaterals correlates with value of intraarterial pressure of middle cerebral artery.
