Quantitative evaluation of carotid blood flow before and after surgery.

Blood flow in 49 patients suffering from stenosing lesions of the supraaortic trunks was measured using an ultrasonic volume flow metre (VFM) before and after operation. Results showed a statistically significant increase in the values of carotid flow, after operation. This non-invasive quantitative determination of blood flow provides the surgeon with often essential information for correct operation and subsequent follow-up.