Duration of preoperative fasting in patients with elective surgery

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Milagros De Luca
Cecilia Mabel Maidana
Denise Moscardi Pietrasanta
Sandra Viviana Velazquez
Patricia Laura Ruscitti

Abstract

Background and objective: preoperative fasting reduces the risk of aspiration of gastric contents and its complications. However, if fasting is excessive, it favours regurgitation and the risk of pulmonary aspiration in patients undergoing general anaesthetic, such as metabolic and electrolyte disorders. We analysed its duration in patients with elective surgeries in public acute care hospital. Material and methodologies: patients over 18 years old with elective surgeries were surveyed. Data about medical fasting indication, time of induction of anaesthesia and personal information was collected. The prescribed fast was compared with the recommendations of the AAARBA (Association of Anaesthesia, Analgesia and Reanimation of Buenos Aires) guidelines. Results: 139 patients were gathered with a median of 48 years old (30; 64), 53% of them were female. Fasting indication median was of 12.5 h for solids and liquids. The fasting made by the patient for solids had a median of 14 h which resulted to be significantly higher to the indication (p < 0.001). By contrast, the fasting for liquids had a median of 12 h which it did not show a significant difference (p = 0.452) with the indication. In comparison with the AAARBA guideline, the fasting indication exceeded the recommendation for solids (4.5 h) and for liquids (10.5 h). The fasting made by the patient exceeded to what was indicated for solids (1.5 h) while for liquids, it was inferior (0.5 h). Conclusion: the indicated preoperative fasting was not adequate to the current recommendations. The hours of fasting made by patient were excessive

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De Luca M, Maidana CM, Moscardi Pietrasanta D, Velazquez SV, Ruscitti PL. Duration of preoperative fasting in patients with elective surgery. Rev Hosp Ital B.Aires [Internet]. 2019 Sep. 30 [cited 2026 Apr. 27];39(3):77-80. Available from: https://ojs.hospitalitaliano.org.ar/index.php/revistahi/article/view/510

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