Does the Angle of Rigid Endoscope Makes a Difference in Videolaryngoscopy

Area of Science:

• Otolaryngology
• Medical Imaging
• Endoscopic Procedures

Background:

• Office-based rigid video laryngoscopy is a key diagnostic tool for laryngopharyngeal disorders.
• The choice of rigid endoscope angulation (0° vs. 70°) may influence visualization efficacy.
• Standardizing and optimizing these procedures is crucial for accurate diagnosis in outpatient settings.

Purpose of the Study:

• To compare the efficacy of 0° and 70° rigid video laryngoscopy for examining laryngopharyngeal disorders.
• To assess if endoscope angulation impacts visualization quality in videolaryngoscopy.
• To evaluate patient comfort and surgeon preference between the two techniques.

Main Methods:

• A prospective, non-randomized, double-blind study involving 375 patients undergoing direct videolaryngoscopies.
• Comparison of 0° and 70° 4mm rigid endoscopes (Karl Storz, Germany) for examining patients with voice change or foreign body sensation.
• Evaluation included patient/surgeon grading, visualization extent, procedure time, and patient preference/discomfort.

Main Results:

• Both 0° and 70° rigid endoscope videolaryngoscopy techniques demonstrated comparable efficacy in laryngeal visualization.
• Statistical analysis indicated no significant difference in diagnostic capability between the two angulations.
• Patient and surgeon assessments found both methods to be equally efficient.

Conclusions:

• The degree of angulation of a rigid endoscope does not significantly affect visualization quality in videolaryngoscopy.
• Both 0° and 70° rigid endoscopes are equally efficient for laryngopharyngeal examinations.
• 0° rigid video laryngoscopy is a viable option for routine laryngological examinations with adequate practice.