Related Experiment Videos
[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.
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.