Monitoring of cerebral oxygenation level during deep hypothermic selective cerebral perfusion by near infrared spectroscopy

Abstract

Cerebral oxygenation levels during deep hypothermic selective cerebral perfusion were measured with near infrared spectro-scopy (NIRS) as a cerebral monitoring system for 4 patients with thoracic aortic aneurysm. The levels monitored with NIRS were almost stable in 3 of 4 patients. In the other 1 patient, the oxyhe-moglobin level which decreased at the onset of selective cerebral perfusion from right axillar artery increased with additional cerebral perfusion from left carotid artery. The relationship between oxy-hemoglobin level and cerebral perfusion rate had a good correlation in each patient. Cerebral oxy-genation monitoring with NIRS may be useful to establish optimal method of cerebral perfusion for patients with thoracic aortic aneurysm.