Related Experiment Video
Updated: Jun 19, 2026

The Rigid Tube as an Alternative in Controlling the Problematic Airway
Published on: June 6, 2020
[BONFILS retromolar intubation fiberscope VS styletscope for oro-tracheal intubation]
Akihiko Maeyama1, Mitsuharu Kodaka, Hideki Miyao
1Department of Anesthesiology, Saitama Medical Center Saitama Medical University, Kawagoe 350-8550.
Background:
Battery-powered BONFILS Retromolar Intubation Fiberscope (B-scope) is a nonflexible fiberscope having the same curvature as the Macintosh laryngoscope. Battery-powered StyletScope (S-scope) has a flexible apex whose direction was controlled by grasping a handle. We assessed the operational performance of the two scopes.
Methods:
Fifty patients were randomly allocated in the two groups :25 patients were in the B group (B-scope) and 25 were S group (S-scope) after obtaining written informed consent. We evaluated Mallampati class classification, size of tracheal tube, and intubation time.
Results:
There are no significance differences between the two groups in Mallampati class, demographic date and intubation time (23 +/-15 sec in B-group and 26 +/-14 sec in S-group). Both scopes were good in operational performance.
Conclusions:
BONFILS Retromolar Intubation Fiberscope and StyletScope are both good in the operational performance.
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