“…Fetal oxygen saturation values of less than 30% have to be reached before anaerobic metabolism starts, causing a decline in pH and extracellular base excess. 10 A reference value of 30% for the fetal oxygen saturation has a good predictive value. It can be favorably compared with that of fetal blood analysis at a 7.20 threshold for fetal scalp pH.…”
“…30 Although fetal oximetry has undergone numerous developments over the years, many questions still remain about its practicality, limitations and application under various clinical conditions. 10 The effective use of fetal pulse oximetry in intrapartum monitoring requires that it be applied transvaginally to an easily accessible area of the fetal presenting part (cheek or temple). The placement of the sensor should cause as little morbidity as possible to both mother and fetus.…”
“…Fetal oxygen saturation values of less than 30% have to be reached before anaerobic metabolism starts, causing a decline in pH and extracellular base excess. 10 A reference value of 30% for the fetal oxygen saturation has a good predictive value. It can be favorably compared with that of fetal blood analysis at a 7.20 threshold for fetal scalp pH.…”
“…30 Although fetal oximetry has undergone numerous developments over the years, many questions still remain about its practicality, limitations and application under various clinical conditions. 10 The effective use of fetal pulse oximetry in intrapartum monitoring requires that it be applied transvaginally to an easily accessible area of the fetal presenting part (cheek or temple). The placement of the sensor should cause as little morbidity as possible to both mother and fetus.…”
“…Bei niedriger Spezifität der CTG-Analyse im Hinblick auf das kindliche Wohlbefinden bei der Geburt und kaum vorhandener Akzeptanz in Bezug auf regelmäûige Fetalblutanalysen [9] fehlt im geburtshilflichen Repertoire aktuell ein kontinuierlich messendes valides Zusatzinstrument. Nachdem in der historischen Rückschau intrauterin applizierte und am fetalen Köpfchen fest fixierte Systeme wie pO 2 -, pCO 2 -und pH-Sonden sich als zu störanfällig gezeigt haben, scheint mit der Weiterentwicklung der externen zu einer intrauterinen Sonde eine neue klinische Möglichkeit der fetalen Überwachung geschaffen worden zu sein [15].…”
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