[Assessment of hemodynamics in the cerebral cortex in newborn infants]

Determinations of blood velocity in vessels of cerebral cortex have been done using a 20 MHz impulse Doppler unit. In comparison we registered the blood flow pulsation curves at the anterior cerebral artery with aid of a 5 MHz-cw-Doppler system. The peripheral resistance index was calculated and it could be proved a strong correlation between the results of the anterior cerebral artery and the vessels of cerebral cortex. Another study showed that the results of the method could be reproduced. The problem of the impulse Doppler examinations of cerebral cortical vessels is the fact, that the exact topography of the vessels examined cannot be defined exactly.