The cricoarytenoid joint capsule encloses the synovial articulation between the arytenoid cartilage and the cricoid lamina, allowing the rocking and gliding motions of the arytenoid during vocal fold movement.
Maintains the arytenoid within its articular facet on the cricoid, enables the rotational and sliding movements used for vocal fold abduction and adduction, and protects the joint cavity.
Cricoarytenoid joint ankylosis from rheumatoid arthritis is a significant cause of bilateral vocal fold immobility producing stridor that must be distinguished from recurrent laryngeal nerve palsy. Joint fixation is confirmed by direct laryngoscopy under anaesthesia — the arytenoid cannot be mobilised with a probe. Arytenoid lateralisation or posterior cordotomy provides airway relief.
Synovial inflammation and joint fixation producing bilateral vocal fold immobility, stridor, and respiratory distress, distinguished from RLN palsy by laryngoscopic probe testing.
Arytenoid cartilage dislocation from traumatic intubation producing hoarseness and acute vocal fold immobility, managed by early endoscopic repositioning.
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