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Warming fluid for amnioinfusion during labor

W R Burrows1, L Gervasi, D Kosty

  • 1Department of Obstetrics and Gynecology, University of South Carolina School of Medicine, Columbia 29203, USA.

The Journal of Reproductive Medicine
|February 1, 1995
PubMed
Summary
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Warming ovens used for surgical fluids are not suitable for labor amnioinfusion. Fluid temperatures varied widely, from 21°C to over 50°C, posing potential risks during labor.

Area of Science:

  • Obstetrics and Gynecology
  • Medical Device Safety
  • Patient Care

Background:

  • Amnioinfusion during labor is often performed with warmed fluids.
  • Blood warmers are ideal but costly and not always accessible.
  • Constant temperature devices for surgical fluids are a common alternative for warming amnioinfusion fluids.

Purpose of the Study:

  • To evaluate the efficacy of warming ovens in heating amnioinfusion fluids to approximately 37°C.
  • To determine if standard surgical fluid warming devices are appropriate for labor amnioinfusion fluid preparation.

Main Methods:

  • Fluid bags were placed in warming ovens for at least 48 hours.
  • The internal temperature of the fluid bags was recorded upon opening.
  • Temperatures were measured to assess consistency and proximity to the target 37°C.

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Main Results:

  • Fluid temperatures exhibited extreme variability, ranging from 21°C to over 50°C.
  • Temperature fluctuations were attributed to oven instability and fluid bag condition.
  • The warming ovens did not consistently achieve or maintain the target body temperature for amnioinfusion fluids.

Conclusions:

  • Blanket and surgical fluid warming ovens are inappropriate for heating amnioinfusion fluids.
  • The variability in temperature poses a risk to patients undergoing amnioinfusion.
  • Alternative methods or validated devices are needed for safe fluid warming in labor.