During ruptured aneurysm surgery, local cortical blood flow (LCBF) was monitored with a thermonal diffusion flow probe. The probe was placed on the cortex of the area supplied by the middle cerebral artery and was covered with a small cottonoid sheet to avoid movement and prevent loose contact with the cortex.
Hemodynamic changes after temporary occlusion and opening of the parent vessels were observed.
At the time of LCBF measurements, many factors that can abnormally change the LCBF must be considered. Irrigation of the brain and inadequate contact between LCBF probe and brain surface easily produce abnormal LCBF.
