Determination of the 90% effective dose of propofol combined with oliceridine or fentanyl for inhibiting the insertion response in upper gastrointestinal endoscopy: a dose-finding trial.

Adverse effects The incidence of oxygen desaturation to SpO2 < 95% and SpO2 < 90%, the need for airway intervention, hypotension requiring vasoactive treatment, NRS fatigue score ≥ 4, dizziness, and PONV were numerically lower in Group O than in Group F; however, these differences did not reach statistical significance ( P > 0.05).

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