[Cerebral blood flow during labor].
The successful results obtained using Doppler sonography for antepartal diagnosis gave cause to use the method during labor. For this purpose doppler measurements of the intern fetal carotid artery of a group of 7 patients with normal course of pregnancy were made and a continuous direct CTG was recorded simultaneously. The Doppler parameter, the S/D-ratio, for the contraction phases were compared with those of the contraction--free phases. During the contraction phase the S/D-ratio was higher than during the relaxation period of the uterus. The difference between these values were proved to be statistically significant. A comparison of the doppler parameter of the patients at onset of labor and the patients at the end of labor showed, that the S/D-ratio increased significantly at the end of labor. This result demonstrates, that the intravascular resistance in the fetal carotid artery increased due to the cephalic pressure.
Fendel
H
H
Ltd. Oberarzt der Frauenklinik, Medizinischen Fakultät, RWTH, Aachen.
Funk
A
A
Jörn
H
H
Gans
A
A
D001783:Blood Flow Velocity / Q000502:physiology; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging; D002560:Cerebrovascular Circulation / Q000502:physiology*; D005260:Female; D006340:Heart Rate, Fetal / Q000502:physiology; D006801:Humans; D007231:Infant, Newborn; D007747:Labor Stage, First / Q000502:physiology; D007743:Labor, Obstetric / Q000502:physiology*; D008431:Maternal-Fetal Exchange / Q000502:physiology*; D011247:Pregnancy; D012016:Reference Values; D016216:Ultrasonography, Prenatal / Q000379:methods*; D014590:Uterine Contraction / Q000502:physiology*
Cerebraler Blutfluss unter der Geburt.