Which intervention does NOT reduce the incidence of nausea and vomiting in children undergoing strabismus surgery?

Which intervention does NOT reduce the incidence of nausea and vomiting in children undergoing strabismus surgery?

• A. Withholding oral intake.
• B. Premedication with clonidine 4 mcg/kg orally.
• C. Dexamethasone 0.15-1 mg/kg IV.
• D. Gastric content evacuation before emergence from anesthesia.

Answer: (D)

The question hinges on strategies that reduce postoperative nausea and vomiting in children, especially after strabismus surgery which is notorious for PONV. Interventions that lessen the emetogenic load or alter central triggers of nausea are helpful. Withholding oral intake reduces the amount of gastric content and limits the risk of regurgitation and distention that can contribute to emesis during emergence, and it also lowers the risk of aspiration. Premedication with clonidine has antiemetic effects through multiple pathways, including reduced autonomic arousal and possibly less need for anesthetic agents and opioids, which helps lower PONV. Dexamethasone given IV is a well-established antiemetic that blocks several emetic pathways, markedly reducing PONV incidence. Evacuating gastric contents before emergence, while it may make emergence smoother and decrease aspiration risk, does not target the central emetic pathways or overall triggers of nausea and vomiting, so it does not meaningfully reduce the incidence of PONV.

The question hinges on strategies that reduce postoperative nausea and vomiting in children, especially after strabismus surgery which is notorious for PONV. Interventions that lessen the emetogenic load or alter central triggers of nausea are helpful. Withholding oral intake reduces the amount of gastric content and limits the risk of regurgitation and distention that can contribute to emesis during emergence, and it also lowers the risk of aspiration. Premedication with clonidine has antiemetic effects through multiple pathways, including reduced autonomic arousal and possibly less need for anesthetic agents and opioids, which helps lower PONV. Dexamethasone given IV is a well-established antiemetic that blocks several emetic pathways, markedly reducing PONV incidence. Evacuating gastric contents before emergence, while it may make emergence smoother and decrease aspiration risk, does not target the central emetic pathways or overall triggers of nausea and vomiting, so it does not meaningfully reduce the incidence of PONV.