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Updated: Apr 29, 2026

Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing
Published on: December 1, 2023
A classification system for airway compromise due to bilateral vocal fold mobility impairment
S A Reza Nouraei1, Guri S Sandhu
1The National Centre for Airway Reconstruction, Department of ENT Surgery, Charing Cross Hospital , London W6 8RF , UK.
Abstract:
We present a system for classification of bilateral vocal fold mobility impairment. Type 1 obstructions are caused by bilateral laryngeal denervation, most commonly due to bilateral recurrent laryngeal nerve palsy. Type 2 obstructions are caused by crico-arytenoid joint ankylosis. Type 3 obstructions are due to inter-arytenoid granulation tissue. Type 4 lesions are caused by mature inter-arytenoid scar tissue and type 5 lesions are complex or total laryngeal stenoses.
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