The ED95 of Ciprofol for Laryngeal Mask Airway Insertion With Fentanyl in Children: A Biased-Coin Dose-Finding Trial
Huazhong University of Science and Technology
180 participants
Jun 15, 2026
INTERVENTIONAL
Conditions
Summary
Ciprofol is a novel intravenous anesthetic with a pharmacological profile similar to propofol but with a lower incidence of injection pain, hypotension, and respiratory depression. For pediatric day-case surgeries, laryngeal mask airway (LMA) insertion without neuromuscular blockers is increasingly preferred. While opioids are often combined with hypnotics to optimize insertion conditions, the optimal bolus dose of ciprofol when co-administered with a standard dose of fentanyl for LMA insertion in children remains unknown. This study aims to determine the 95% effective dose (ED95) of a single intravenous bolus of ciprofol, combined with a fixed dose of fentanyl (1 μg/kg), for successful LMA insertion in children aged 1-12 years during general anesthesia induction.
Eligibility
Inclusion Criteria4
- American Society of Anesthesiologists (ASA) physical status I or II
- Aged 1 to 12 years
- Scheduled for elective surgery requiring general anesthesia with laryngeal mask airway (LMA) insertion (e.g., ophthalmic surgery, skin lesion excision, minor abdominal or urological procedures, with expected surgical duration ≤ 2 hours)
- Written informed consent obtained from parents or legal guardians
Exclusion Criteria7
- Known allergy or hypersensitivity to ciprofol, fentanyl, or any study-related drugs
- Intellectual disability, cognitive-affective disorders, psychiatric or neurological diseases
- Inability to cooperate with peripheral intravenous cannulation
- History of reactive airway disease or suspected difficult airway
- Body mass index (BMI) ≥ 30 kg/m² or ≤ 15 kg/m²
- History of sedative medication use
- Inability to understand the study protocol or participation in another clinical trial within the past 30 days
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Interventions
All patients will receive a fixed dose of fentanyl (1 μg/kg) and a predetermined bolus dose of ciprofol, administered intravenously over 1 minute. The initial ciprofol dose is set at 0.35 mg/kg, with a dose step size of 0.1 mg/kg. The dose for each subsequent patient is determined by the biased-coin design: if the previous patient achieves successful LMA insertion (no movement), the next patient receives the same dose with a probability of 0.947 or a 0.1 mg/kg lower dose with a probability of 0.053. If the previous patient fails (movement occurs), the next patient receives a 0.1 mg/kg higher dose.
All patients will receive a fixed dose of fentanyl (1 μg/kg) and a predetermined bolus dose of ciprofol
Locations(1)
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NCT07697404