bonfils fiberscope: intubating conditions and hemodynamic changes without neuromuscular blockade

to compare intubating conditions and hemodynamic changes between bonfils intubation fiberscope and macintosh laryngoscopy without administering neuromuscular blocking drugs (nmbds). methods: in this randomized controlled trial,80 male and female patients, scheduled for elective surgery, aged 15 to 60 years, asa class ii or i, non-obese, non smokers, without anticipated difficult intubation; were randomly allocated into two groups of 40: bonfils and macintosh. following adequate hydration and preoxygenation, midazolam 0.03 mg.kg-1 was administered, followed by intravenous alfentanil 20 µg.kg-1, lidocaine 1.0 mg.kg-1, and propofol 2 mg.kg-1 sequentially. trachea was then intubated using bonfils intubation fiberscope in the bonfils group and conventional macintosh laryngoscopy in the macintosh group. intubating condition, mean arterial blood pressure, heart rate, pulse oximetry, and success rate were measured. results: clinically acceptable intubating condition scores did not differ significantly between the groups (p=0.465). compared to the baseline values, heart rate rose significantly after intubation only in the macintosh group (p