title: A comparison of the effects of omeprazole and ranitidine on gastric secretion in women undergoing elective caesarean section.
abstract: This study compares the efficacy of omeprazole and ranitidine at reducing gastric secretion in obstetric patients. Sixty-five women scheduled to undergo elective Caesarean section under general anaesthesia were randomly allocated to receive either omeprazole 40 mg or ranitidine 150 mg orally at 2200 hours the night before and at 0600 hours on the morning of surgery. Intragastric pH and volume were measured immediately after induction of anaesthesia and on completion of surgery. All patients had gastric aspirates less than 25 ml. None of the omeprazole group had an aspirate of pH less than 3.5. Six patients (19%) in the ranitidine group had aspirates of pH less than 3.5, a significant difference from the omeprazole group (p less than 0.05). Of these six, two (6%) had aspirates of pH less than 2.5. Hence this study showed that omeprazole was more effective and consistent than ranitidine at maintaining gastric pH greater than 3.5.
authors.affiliation: Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories.
authors.forename: M C
authors.initials: MC
authors.lastname: Ewart
authors.forename: G
authors.initials: G
authors.lastname: Yau
authors.forename: T
authors.initials: T
authors.lastname: Gin
authors.forename: C F
authors.initials: CF
authors.lastname: Kotur
authors.forename: T E
authors.initials: TE
authors.lastname: Oh
mesh_terms: D000328:Adult; D000773:Anesthesia, Obstetrical; D002585:Cesarean Section; D003864:Depression, Chemical; D005260:Female; D005745:Gastric Acidity Determination; D005750:Gastric Juice / Q000378:metabolism*; D006801:Humans; D009853:Omeprazole / Q000494:pharmacology*; D011247:Pregnancy; D011292:Premedication; D011300:Preoperative Care / Q000379:methods; D011897:Random Allocation; D011899:Ranitidine / Q000494:pharmacology*; D012636:Secretory Rate / Q000187:drug effects
chemical_list: D011899:Ranitidine; D009853:Omeprazole