Perioperative medicine & outcomes

Ultrasound assessment of preoperative gastric volume in fasted diabetic surgical patients: A prospective observational cohort study on the effects of glucagon-like peptide-1 agonists on gastric emptying

J Clin AnesthPublished Prospective observational cohort study

Authors' conclusion

GLP-1 agonist therapy was associated with higher residual gastric volumes and higher risks of full stomachs in fasted diabetic patients.

Study context

Population
Appropriately fasted diabetic patients undergoing elective surgery
Participants
106 vs 100
Exposure
GLP-1 agonist use vs no GLP-1 agonist use
  • GLP-1 agonistsn = 106
  • Not taking GLP-1 agonistsn = 100reference
Outcome
Gastric volume by gastric ultrasound in the right lateral decubitus position

Main finding

As reported in the abstract

Gastric volume

P < 0.001

Observational data: associations, not effects.

Secondary outcomes

OutcomeOR (95 % CI)P value
Full stomach (solids/thick liquids or >1.5 mL/kg clear liquid)11.3 (5.2–24.7)P < 0.0001
OutcomeP value
Perlas gradeP < 0.001

Perlas grade

GLP-1 agonist use correlated with higher Perlas grades

Gastric volume by timing of last GLP-1 agonist dose (subgroup)

Significantly higher gastric volumes with use within 7 days of surgery vs use within 7-14 days or >14 days from surgery
P < 0.001 for both comparisons

Original publication

Ultrasound assessment of preoperative gastric volume in fasted diabetic surgical patients: A prospective observational cohort study on the effects of glucagon-like peptide-1 agonists on gastric emptying. J Clin Anesth. Published 4 May 2025. doi:10.1016/j.jclinane.2025.111853

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