[Comparative study of pre-ejection period and trans-cutaneously measured pO2 sub partu (author's transl)].
Transcutaneously measured pO2 (tc pO2), Pre-ejection-period (PEP) fetal heart rate (FHR) and intrauterine pressure were registered simultaneously in 5 cases of fetuses having umbilical cord complications. In addition a punctual measurement of acid-base-status was performed during intra partal registration and after delivery.


RESULTS
In each fetus there is a relative correlation of basic PEP and basic tc pO2. An almost parallel pattern of PEP and tc pO2 occurred during uterine contractions, while both parameters are strictly correlated. There is always a prolongation of the PEP and a rise in tc pO2 of the fetal scalp during deceleration and uterine contractions. PEP changes due to a decrease of preload and increase of afterload of the fetal heart, the relative better oxygenation of the fetal scalp during uterine contractions and decelerations due to a redistribution of circulating blood volume caused by a selective peripheral vasoconstriction.
D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D007743:Labor, Obstetric; D007744:Obstetric Labor Complications; D010100:Oxygen / Q000378:metabolism; D010313:Partial Pressure; D011247:Pregnancy; D014470:Umbilical Cord; D014590:Uterine Contraction
D010100:Oxygen
Vergleichende Untersuchungen von Pre-ejection-period und transkutan gemessener Sauerstoffspannung unter der Geburt.