Norsk gynekologisk forening

Publikasjoner

Referansekurver for pH og pCO2 ved syre base analyse i navlesnoren. 2010

Denne studien gir oss et robust verktøy i kvalitetssikringen av syre base prøver i navlesnoren ved fødsel. Ved hjelp av percentilkurver kan man lett identifisere prøver der pH og pCO2 står i et fysiologisk lite sannsynlig forhold til hverandre, som oftest beroende på feilmåling av pCO2. Referansetabellene bør være tilgjengelig på alle fødeavdelinger!
20. august 2011

BJOG. 2010 Nov;117(12):1544-52. doi: 10.1111/j.1471-0528.2010.02711.x. Epub 2010 Sep 14.

A new tool for the validation of umbilical cord acid-base data.

Kro GA, Yli BM, Rasmussen S, Norèn H, Amer-Wåhlin I, Saugstad OD, Stray-Pedersen B, Rosén KG.

Department of Paediatric Research, Women and Children's Division, Oslo University Hospital Rikshospitalet, Oslo, Norway.

Abstract

OBJECTIVE: To identify the distribution of carbon dioxide tension (pCO(2) ) relative to pH in validated umbilical cord acid-base data.

DESIGN: Observational study.

SETTING: European hospital labour wards.

POPULATION: Data for 36,432 term newborns were obtained from three sources: two trials of fetal monitoring with electrocardiography (ECG; the Swedish randomised controlled trial and the European Union Fetal ECG trial) and data from Mölndal Hospital.

METHODS: From the total study population, cases with missing values or obvious typing errors were excluded. The remaining data were validated based on specified criteria. Percentiles of arterial pCO(2) by pH were calculated using multilevel regression modelling.

MAIN OUTCOME MEASURES: Umbilical cord pH, pCO(2) and base deficit.

RESULTS: Acid-base values were considered invalid in one out of seven cases. Percentiles for arterial pCO(2) corresponding to specified values of arterial pH were developed from the validated data of 26, 690 cases.

CONCLUSIONS: Percentiles for arterial pCO(2) for a specified arterial pH can be used as a tool to identify cases with erroneously low pCO(2) values, and thus avoid an incorrect interpretation of the newborn's acid-base status.