Gastric fluid volume and pH in elective inpatients. Part I: coffee or orange juice versus overnight fast

Hutchinson, A.; Maltby, J. R.; Reid, C. R. G.

doi:10.1007/bf03010537

Cited by 134 publications

(79 citation statements)

References 10 publications

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“…3 When clear fluids such as tea, coffee, fruit juice, or water were allowed until three hours before the scheduled time of surgery, there was no difference in residual gastric fluid volume or pH at induction of anaesthesia between those who drank and those who fasted from midnight. 4 More patients who had coffee or orange juice felt less hungry and less thirsty than in the group who fasted.…”

Section: How Long Should We Fast Our Patients?mentioning

confidence: 98%

Which is the best anaesthetic technique?

Chung

1991

Can J Anaesth

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Section: How Long Should We Fast Our Patients?mentioning

confidence: 98%

Which is the best anaesthetic technique?

Chung

1991

Can J Anaesth

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“…sont pour le groupe 1 -1,8 (1,(0)(1)(2)(3)(4)6), groupe 2 -1,6 (1,3-l,9), groupe 3 -1,7 (1,(0)(1)(2)(3)(4)4 Occasionally a patient presents in the operating room chewing gum. This sets up a dilemma for the anaesthetist as to whether to ignore the gum and proceed as usual or to consider the act of chewing gum similar to oral intake and to delay surgery.…”

Section: Certains Anesth3sistes H~sitent ~ Anesth~sier Ces Patients mentioning

confidence: 99%

Sugarless gum chewing before surgery does not increase gastric fluid volume or acidity

et al. 1994

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“…II est intEressant de noter que I'addition d'une petite quantitE de cr/~me ou de sucre au cafd ou au the ne retarde pas significativement la vidange gastrique. 8 Particuli/:rement intEressantes sont les directives de jefine pour les enfants qui tol~rent moins que les adultes le jeOne prolongE, lls ne comprennent pas les r~:gles de la soif et de la faim et peuvent passer outre la surveillance du personnel infirmier ou des parents pour boire de l'eau de fontaine ou prendre le petit dEjeflner d'un autre enfant. La libEralisation des directives pour I'administration prEopEratoire des iiquides offre le bEnEfice d'amEliorer le confort du patient 6 et doit diminuer le nombre d'enfants dEmontrant des signes de dEshydratation lors de I'induction de l'anesthEsie.…”

Section: Directives Concernant Le Jefine Des Patients Lors D'une Chirunclassified

Fasting guidelines for elective surgical patients

Goresky

Maltby

1990

Can J Anaesth

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The basic physiology of digestion and gastric emptying was described before the discovery of general anaesthesia. Beaumont, in 1833, made direct observations in a man whose gunshot wound to the stomach had healed, leaving a gastric fistula. ~ He recorded that up to five hours were required for solid food to be converted to semifluid chyme and for the chyme to pass through the pylorus; clear liquids were emptied "soon after they were received." In 1858, Snow followed physiological principles with his recommendation that an operation should be performed "about the time when a patient would be ready for another meal"; 2 subsequent authors recommended that clear fluid should be taken two 3 or three hours before surgery. 4 The routine order"NPO after midnight" ignores both the difference in rate of gastric emptying between solid food and clear fluids, and the differences in scheduled times for surgery.A consistent finding in recent clinical studies has been that gastric fluid pH and volume are independent of the duration of the fluid fast beyond two hours, provided that only clear fluids are consumed on the day of surgery. 5-8 When more than two hours have elapsed following clear fluid ingestion, endogenous gastric secretion is the principal determinant of the pH and volume of gastric contents. A longer fluid fast does not improve the gastric environment, although timing for administration of preoperative fluids must make some allowance for surgical cancellations or delays.In the absence of pathological factors, ingestion of most liquids increases the rate of gastric emptying. 9 Because of the prolonged and variable time required for gastric emptying of solids, fats, and liquids of high osmotic pressure 1~ it seems prudent that they should not be consumed on the day of surgery; attention has therefore been focussed on the preoperative administration of clear liquids. Those which have been studied are water, carbonated beverages, clear fruit juice, tea and coffee. It

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Gastric fluid volume and pH in elective inpatients. Part I: coffee or orange juice versus overnight fast

Cited by 134 publications

References 10 publications

Which is the best anaesthetic technique?

Which is the best anaesthetic technique?

Sugarless gum chewing before surgery does not increase gastric fluid volume or acidity

Fasting guidelines for elective surgical patients

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