Rate of increase in oxytocin dose on the outcome of labor induction

Jul 6, 2005International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics

How the speed of raising oxytocin dose affects labor induction results

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Abstract

Labor duration was significantly shorter with a geometric increase in oxytocin dosage, averaging 421.34 minutes compared to 496.33 minutes with arithmetic increases.

The average maximum oxytocin delivery rates were similar between the arithmetic and geometric groups, at 24.66 mU/min and 26.38 mU/min, respectively.
Labor duration was notably reduced in the geometric group, indicating a more efficient induction process.
No significant differences were observed in cesarean section rates or vaginal deliveries between the two dosage increase methods.
There were no variations in rates of uterine hyperstimulation or in neonatal outcomes between the groups.

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OBJECTIVE: To compare the efficacy and safety of arithmetic and geometric increases in oxytocin infusion dosage during induction of labor.

METHODS: A total of 120 pregnant women requiring induction of labor at term were randomly assigned to receive oxytocin at dosages increasing arithmetically or geometrically. Maternal demographics, labor delivery data, and newborn outcomes were compared. The setting was the maternity unit of the Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Nigeria.

RESULTS: The mean maximum rates of oxytocin delivery needed to achieve adequate uterine contractions were similar in the 2 groups (24.66+/-8.34 mU/min vs. 26.38+/-8.77 mU/min, P=0.24). Labor duration was significantly shorter in the geometric progression group (496.33+/-54.77 min vs. 421.34+/-63.91 min, P<0.001). There were no differences in the rates of cesarean sections, vaginal deliveries, or uterine hyperstimulation, or in neonatal outcomes.

CONCLUSION: A geometric rise in the rate of oxytocin infusion delivery reduced the duration of labor without affecting the rates of cesarean sections and uterine hyperstimulation, or newborn outcomes.

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Rate of increase in oxytocin dose on the outcome of labor induction

Abstract

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