Die Auswirkung einer Arteria-carotis-Thrombendarteriektomie auf den pulsatilen okulären Blutfluss

Successful operations of clinically significant carotid artery stenosis by carotid endarterectomy (CEA) are leading to a better perfusion in the region of this artery. It still creates problems to make a statement about cerebral and ocular perfusion during the operation. Methods. In 10 patients who underwent a CEA the pulse amplitude (PA) of the intraocular pressure (IOP) was measured intraoperatively by a pneumotonograph (OBF-Systems, U.K.) and the so called pulsatile ocular blood flow (pOBF) was determined. The middle arterial blood pressure (MAP) was taken invasively during the operation. Results. During the clamping phases no PA could be recorded. PA (p=0.04) and pOBF (p=0.028) increased on the side which had been operated on. No correalations of PA and pOBF to MAP were found. Conclusion. This method can prove an increased pulsatile ocular blood flow after successful CEA.