Changes in cerebral blood flow velocities on the different sampling points of the cerebral arteries by pulsed Doppler sonography.

概要

論文の詳細を見る
This study was conductede to evaluate changes of blood flow velocities at different positions in the same artery. The subjects were 12 normal neonates, aged 8 to 189 hours. We examined cerebral blood flow velocity at eight points (5 proximal and 3 distal regions) on the anterior cerebral artery (ACA) and four points on the basilar artery (BA) by pulsed Doppler sonography under color Doppler guiding, model Aloka SSD 870. The blood flow velocities and resistance indices (RI) at proximal ACA ranged from 39.33 to 42.42 cm/sec and from 0.71 to 0.73 respectively, and those at BA were from 40.83 to 47.42 cm/sec and from 0.71 to 0.74, respectively. These scores were not statistically different. There has been little atteation paid to positional differences in the blood flow velocities and RIs in measuring proximal ACA and BA. These arteries may be influenced mainly by the cardiac pump function. On the other hand, the velocities and RIs on distal ACA were lower than those on proximal ACA. Sampling scores were gradually decreased from the proximal to the distal portions on the distal ACA. Flow patterns of the distal portion of ACA may reflect peripheral vascular resistance.
日本脳神経超音波学会の論文