The effect of the duration of the second stage of labour on the acid‐base state of the fetus

MIRIAM KATZ; EITAN LUNENFELD; ISRAEL MEIZNER; NAVA BASHAN; JACQUELINE GROSS

doi:10.1111/j.1471-0528.1987.tb03120.x

The effect of the duration of the second stage of labour on the acid‐base state of the fetus

MIRIAM KATZ, EITAN LUNENFELD, ISRAEL MEIZNER, NAVA BASHAN, JACQUELINE GROSS

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Abstract

A prospective study was made in 153 patients with a second stage of labour lasting 1 to 120 min. Maternal venous, umbilical artery and vein blood were analysed for acid‐base variables and lactate levels. Blood was obtained immediately at delivery. Fetal heart rate monitoring data and blood test results were related to the duration of the second stage of labour and clinical outcome. In primiparae and multiparae there was a steady rise in umbilical artery lactate levels, with duration of second stage of labour, P>0·025 and P= 0·023, respectively. The median umbilical artery pH decreased significantly from 7·31 in patients with a second stage of labour that lasted ≤15 min to a pH of 7·25 in patients with a second stage of labour that lasted more than 30 min. Changes in Po₂ and Pco₂ were not statistically significant.

Original language	English
Pages (from-to)	425-430
Number of pages	6
Journal	BJOG: An International Journal of Obstetrics and Gynaecology
Volume	94
Issue number	5
DOIs	https://doi.org/10.1111/j.1471-0528.1987.tb03120.x
State	Published - 1 Jan 1987

ASJC Scopus subject areas

Obstetrics and Gynecology

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10.1111/j.1471-0528.1987.tb03120.x

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abstract = "A prospective study was made in 153 patients with a second stage of labour lasting 1 to 120 min. Maternal venous, umbilical artery and vein blood were analysed for acid‐base variables and lactate levels. Blood was obtained immediately at delivery. Fetal heart rate monitoring data and blood test results were related to the duration of the second stage of labour and clinical outcome. In primiparae and multiparae there was a steady rise in umbilical artery lactate levels, with duration of second stage of labour, P>0·025 and P= 0·023, respectively. The median umbilical artery pH decreased significantly from 7·31 in patients with a second stage of labour that lasted ≤15 min to a pH of 7·25 in patients with a second stage of labour that lasted more than 30 min. Changes in Po2 and Pco2 were not statistically significant.",

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AU - LUNENFELD, EITAN

AU - MEIZNER, ISRAEL

AU - BASHAN, NAVA

AU - GROSS, JACQUELINE

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The effect of the duration of the second stage of labour on the acid‐base state of the fetus

Abstract

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