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Intrauterine temperature during intrapartum amnioinfusion: a prospective observational study
T M Tomlinson1, C Schaecher, Y Sadovsky
1Department of Obstetrics, Gynecology and Reproductive Biology, Harvard University, Boston, MA, USA. ttomlinsonmd@gmail.com
Summary
Routine intrapartum amnioinfusion (AI) significantly lowers intrauterine temperature. This finding suggests a potential impact on fetal core temperature during labor, warranting further investigation into clinical implications.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Intrapartum Care
Background:
- Intrapartum amnioinfusion (AI) is a procedure used in labor and delivery.
- The effect of AI on maternal and fetal temperature during labor is not well-established.
- Monitoring intrauterine temperature is crucial for assessing fetal well-being.
Purpose of the Study:
- To investigate the influence of routine intrapartum amnioinfusion (AI) on intrauterine temperature.
- To quantify changes in intrauterine temperature during labor with and without AI.
Main Methods:
- Prospective observational study conducted in a maternity unit.
- Intrauterine temperature was digitally recorded every 10 minutes in 40 women undergoing labor with an indication for intrauterine pressure catheter placement.
- Amnioinfusion was performed using saline equilibrated to ambient temperature.
Main Results:
- Amnioinfusion was associated with a significant decrease in mean intrauterine temperature (36.4°C in AI cohort vs. 37.4°C in controls, P<0.01).
- In a subgroup of afebrile parturients, AI resulted in an even greater temperature decrease (1.5°C).
- A higher proportion of AI measurements were recorded during intrapartum fever compared to controls.
Conclusions:
- Routine intrapartum amnioinfusion using saline at ambient temperature effectively reduces intrauterine temperature.
- The observed reduction in intrauterine temperature may have implications for fetal core temperature.
- Further research is needed to understand the clinical significance of these temperature changes for fetal outcomes.
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