Role of Ultrasonography in Upper Airway Assessment for Decannulating Tracheostomy in Acquired Brain Injury-A Pilot Study.

Abstract

To compare the findings of ultrasonography of the upper airway with flexible fiberoptic laryngoscopy and determine the efficacy of transcutaneous laryngeal ultrasonography for decannulation. Prospective cross-sectional study. Tertiary care referral center in South India. Twenty-four patients with acquired brain injury (N=24). Participants underwent an airway assessment by ultrasonography followed by assessment of airway by flexible laryngoscopy done within the next 72 hours. Vocal cord assessment by ultrasonography revealed a sensitivity of 81.2% and specificity of 87.5%. A statistically significant association between vocal cord mobility as assessed by ultrasonography and decannulation was observed (sensitivity of 81.25%, specificity of 87.5%, P=.002). Although aspiration was not assessed by ultrasonography, a statistically significant association was observed between vocal cord mobility on ultrasonography and aspiration as assessed by laryngoscopy (sensitivity of 81.25%, specificity of 87.5%, P=.011). Laryngeal ultrasonography is an emerging diagnostic modality with a potential role for assessing vocal cord mobility and airway prior to decannulation in centers that lack the expertise and the infrastructure to perform a flexible laryngoscopy.