Fetal oxygen saturation monitoring in labour: an analysis of 118 cases

The Australian & New Zealand Journal of Obstetrics & Gynaecology
C E EastJ W Earl

Abstract

Fetal oxygen saturation (FSpO2) was recorded during labour to determine the relationship between FSpO2 and indicators of fetal well-being, including umbilical blood gases, xanthine (X), hypoxanthine (Hx) and Apgar scores. This is one of the largest reported series of fetal pulse oximetry, with 118 fetuses monitored for over 329 hours. Mean FSpO2 for all cases was 46.9% (SD = 9.1%). There was no correlation between FSpO2 during the last 10 minutes of monitoring and arterial pH, Hx or X. A mean FSpO2 > or = 30% was associated with a 5 minute Apgar score of > or = 7 in the majority of cases. One fetus had a mean FSpO2 < 30% during the final 10 minutes of monitoring and an umbilical arterial pH < 7.20, while there were 10 fetuses with an umbilical arterial pH < 7.20, and mean FSpO2 > or = 30%. As these numbers are small, a larger series is necessary to further characterize the small number of fetuses who are significantly hypoxic.

References

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Citations

Mar 14, 2000·Obstetrical & Gynecological Survey·J YamS Arulkumaran
Jun 19, 2002·The Australian & New Zealand Journal of Obstetrics & Gynaecology·Christine E EastShaun P Brennecke
Dec 6, 2007·Anesthesia and Analgesia·Christine E East, Paul B Colditz
Oct 31, 2007·Journal of Clinical Anesthesia·Brendan CarvalhoEdward T Riley
Dec 10, 1999·Obstetrics and Gynecology Clinics of North America·H M McNamara, G A Dildy
Oct 8, 2014·The Cochrane Database of Systematic Reviews·Christine E EastRosalind Lau
May 18, 2006·The Australian & New Zealand Journal of Obstetrics & Gynaecology·Christine E EastPaul B Colditz
Mar 14, 2000·Obstetrical & Gynecological Survey·J YamS Arulkumaran
Dec 29, 1998·Current Opinion in Obstetrics & Gynecology·A K Luttkus, J W Dudenhausen
Nov 5, 2002·Anaesthesia and Intensive Care·D W CollinsR J Turner

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