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Related Experiment Videos

Acid aspiration prophylaxis for emergency Caesarean section

J C Stuart1, A F Kan, S J Rowbottom

  • 1Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Shatin.

Anaesthesia
|May 1, 1996
PubMed
Summary

This study compared acid aspiration prophylaxis regimens for emergency Cesarean sections. Intravenous ranitidine or omeprazole with sodium citrate effectively reduced gastric acidity compared to sodium citrate alone.

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Area of Science:

  • Anesthesiology
  • Obstetrics
  • Pharmacology

Background:

  • Emergency Cesarean sections under general anesthesia pose a risk of acid aspiration.
  • Effective prophylaxis is crucial to minimize maternal and fetal complications.

Purpose of the Study:

  • To compare the efficacy of different acid aspiration prophylaxis regimens in patients undergoing emergency Cesarean section.
  • To evaluate the impact of sodium citrate, metoclopramide, ranitidine, and omeprazole on gastric volume and acidity.

Main Methods:

  • 384 patients undergoing emergency Cesarean section were randomized to six prophylaxis regimens.
  • Regimens included oral sodium citrate, intravenous metoclopramide, ranitidine, and omeprazole, in various combinations.
  • Gastric contents were aspirated and pH measured to assess acidity and volume.

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Main Results:

  • Intravenous ranitidine and omeprazole, when combined with sodium citrate, were equally effective in reducing gastric acidity (pH > 5.76).
  • These combined regimens significantly reduced the proportion of patients with high gastric acidity and volume compared to sodium citrate alone (pH < 3.5 and volume > 25 ml).
  • Addition of ranitidine, omeprazole, or metoclopramide alone to sodium citrate did not significantly reduce gastric volume.

Conclusions:

  • Intravenous ranitidine or omeprazole are effective adjuncts to sodium citrate for reducing gastric acidity in emergency Cesarean sections.
  • Combined regimens offer improved acid aspiration prophylaxis compared to sodium citrate alone.
  • Further research may explore optimal combinations for gastric volume reduction.