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Large volumes of apple juice preoperatively do not affect gastric pH and volume in children

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Abstract

The effect on gastric pH and volume of 0, 6 and 10 ml · kg−1, of apple juice given 2.5 hours before surgery to children aged five to ten years was investigated in this prospective, randomized, single-blind study. Gastric contents were aspirated after induction of anaesthesia, and the volume measured. The pH of the gastric aspirate was then assessed using pH paper. Neither gastric volume nor pH immediately following the induction of general anaesthesia were significantly different among the three groups. Gastric volumes after 0, 6 and 10 ml · kg−1, of juice averaged (mean ±SD) 0.45 ±0.31, 0.66 ±0.79 and 0.71 ±0.76 ml · kg−1, respectively; gastric pH averaged 1.7 ±0.6, 1.7 ±0.6 and 1.8 ±0.8, respectively. On the basis of questions asked immediately before induction of anaesthiesia, patients who drank 6 ml · kg−1 of apple juice had decreased thirst and were less irritable and upset before anaesthesia than those who had not (P < 0.05). It is concluded that drinking large volumes of clear apple juice 2.5 hours before scheduled surgery does not have a measurable effect on gastric volume and pH and may offer benefits such as improved patient comfort.

Résumé

L’effet sur le volume et le pH gastrique de 0,6 et 10 ml · kg−1 de jus de pomme donné 2.5 heures avant la chirurgie aux enfants âgés de cinq à dix ans a été investigué dans cette étude prospective randomisée et a simple insu. Le contenu gastrique fut aspiré après induction de l’anesthésie et le volume mesuré. Le pH du sue gastrique aspiré a par la suite été évalué par un papier à pH. Ni le volume gastrique ni son pH n’était significativement différent pour les trois groupes après l’induction de l’anesthesie générale. Le volume gastrique après 0,6 et 10 ml · kg−1 de jus de pomme était en moyenne (moyenne ±SD) respectivement 0,45 ±0,31, 0,66 ±0,79 et 0,71 ±0,76 ml · kg−1, en moyenne le pH gastrique était de 1,7 ±0,6, 1,7 ±0,6 et 1,8 ±0,8. Pour les avoir questionné immédiatement avant l’induction de l’anesthésie les patients ayant bu 6 ml · kg−1 de jus de pomme avaient moins soif et étaient moins irritables avant l’anesthésie que ceux qui n’en ont pas eu (P < 0.05). On conclut que l’ingestion dun large volume de jus de pomme 2.5 heures avant la chirurgie n’a pas d’effet mesurable sur le volume et le pH gastrique et peut offrir des bénéfices tel que l’amélioration du confort du patient.

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Splinter, W.M., Stewart, J.A. & Muir, J.G. Large volumes of apple juice preoperatively do not affect gastric pH and volume in children. Can J Anesth 37, 36–39 (1990). https://doi.org/10.1007/BF03007481

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