Key result
Ingestion of 200 ml of clear fluids 2 hours before surgery resulted in a significantly lower mean gastric volume compared to overnight fasting (19.2 vs 29.7 ml; P<0.00001).
Why the study?
Prolonged pre-operative fasting does not guarantee an empty stomach, prompting evaluation of whether fasting hours can be reduced without increasing aspiration pneumonia risk.
Does ingestion of 200 ml clear fluids 2 hours before surgery reduce gastric volume and increase pH compared to overnight fasting in ASA I patients undergoing elective surgery?
Population
60 ASA I patients undergoing elective surgery
Comparison
200 ml clear fluids 2 hours prior to surgery vs overnight fasting
Design
Randomised clinical trial
Authors
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May allow clear fluids 2 hours preoperatively in ASA I patients; confirms shortened fasting lowers gastric volume versus overnight protocols.
RCT (n=60)
Computer generated randomization table
Does ingestion of 200 ml clear fluids 2 hours before surgery reduce gastric volume and increase pH compared to overnight fasting in ASA I patients undergoing elective surgery?
Absolute Event Rate: 19.2% vs 29.7%
p-value: p=<0.00001
Ingestion of 200 ml of clear fluids 2 hours before surgery results in lower gastric volume and higher pH compared to overnight fasting, potentially reducing the risk of aspiration.
Patil et al. (2020) conducted an RCT in ASA I patients undergoing elective surgery (n=60). Clear fluids (water) vs. Overnight fasting was evaluated on Mean gastric volume by ultrasonography (p=<0.00001). Ingestion of 200 ml of clear fluids 2 hours before surgery resulted in a significantly lower mean gastric volume compared to overnight fasting (19.2 vs 29.7 ml; P<0.00001).
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