The recent release of the “American Society of Anesthesiologists Consensus-Based Guidance on Preoperative Management of Patients (Adults and Children) on Glucagon-Like Peptide-1 (GLP-1) Receptor Agonists” was timely and relevant. These medications delay gastric emptying and have resulted in significant complications for patients undergoing anesthesia.2–4  These effects on gastric emptying have consistently been demonstrated in studies using the gold standard examination, scintigraphy. However, the continued use of an inferior test instead of scintigraphy coupled with uncertainty around the concept of tachyphylaxis has created the potential for confusion that must be firmly contradicted. The evidence is clear, all GLP-1 receptor agonists can delay gastric emptying.

The gold standard examination for measuring gastric emptying, nuclear scintigraphy, has consistently found that all GLP-1 receptor agonists delay emptying (table 1).5–10  However, not all studies in the GLP-1 receptor agonists have used scintigraphy. Instead, the cheaper acetaminophen absorption test has increasingly...

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