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Temperature changes and shivering after epidural anesthesia for cesarean section.

V W Chan1, P K Morley-Forster, H A Vosu

  • 1Department of Anaesthesia, St. Joseph's Hospital, London, Ontario, Canada.

Regional Anesthesia
|January 1, 1989
PubMed
Summary

Warming measures during Cesarean sections significantly reduced core temperature drop in parturients receiving epidural anesthesia. However, these interventions did not impact the incidence of shivering, which occurred early.

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Area of Science:

  • Anesthesiology
  • Obstetrics
  • Thermoregulation

Background:

  • Epidural anesthesia commonly used for Cesarean sections can lead to maternal hypothermia.
  • Hypothermia during surgery is associated with adverse outcomes, including shivering.

Purpose of the Study:

  • To evaluate the effectiveness of active warming interventions in preventing core temperature decrease during epidural anesthesia for Cesarean sections.
  • To assess the impact of warming on the incidence and timing of shivering in parturients.

Main Methods:

  • Two groups of parturients undergoing elective Cesarean sections with epidural anesthesia were studied.
  • Group 2 received warm intravenous fluids, prep solutions, and extra body covering; Group 1 did not.
  • Bladder, tympanic membrane, and skin temperatures were monitored throughout the procedures.

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Main Results:

  • Patients in Group 1 (no warming) experienced a significantly greater drop in bladder temperature compared to Group 2 (warming).
  • The incidence of shivering was similar between the two groups (52% vs. 68%).
  • Shivering onset peaked within 10 minutes of anesthesia, preceding significant core temperature decline, and correlated with bladder temperature drop.

Conclusions:

  • Active warming interventions effectively reduce core temperature loss during epidural anesthesia for Cesarean sections.
  • Warming measures did not significantly alter the incidence of shivering, which appears to be an early response to epidural anesthesia.