[Monitoring fetal delivery by oxycardiotocography].
Oxycardiotocography is a combination of cardiotocography and continuous registration of the foetal arterial oxygen saturation (SaO2). In a few cases, the value of this additional information of foetal SaO2 is demonstrated. During uncomplicated deliveries with normal foetal heart rate patterns, the foetal SaO2 usually ranges between 50% and 70%. Uterine hyperactivity with impaired perfusion of the placenta shows besides a changed heart rate patterns, a significant decrease of the foetal oxygen saturation. Conversely, by supplying oxygen to the mother with a mask, the foetal oxygen saturation can be increased by approx. 10%. In case of a breech presentation and application of the sensor to the buttocks, the measured O2-saturation is approx. 10% to 15% below the values usually obtained from the scalp because the tissue there is supplied with mixed blood after the ductus.
Knitza
R
R
Frauenklinik im Klinikum Grosshadern, Ludwig-Maximilians-Universität, München.
Rall
G
G
Mainz
S
S
Ko
H K
HK
Kleiner
B
B
Hepp
H
H
D001034:Apgar Score; D001946:Breech Presentation; D015148:Cardiotocography / Q000295:instrumentation*; D003626:Data Display; D005260:Female; D006340:Heart Rate, Fetal / Q000502:physiology; D006801:Humans; D007231:Infant, Newborn; D008838:Microcomputers; D010100:Oxygen / Q000097:blood*; D010102:Oxygen Inhalation Therapy; D011247:Pregnancy; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*
D010100:Oxygen
Fetale Geburtsüberwachung durch Oxykardiotokographie (OCTG).