Surgical outcomes and sleep endoscopy for children with sleep-disordered breathing and hypotonia

Objective: To study the efficacy of surgical management for obstructive sleep apnea (OSA) syndrome in children with hypotonia, and to identify common anatomic sites of airway obstruction. Methods: Retrospective chart review of polysomnographic parameters and quality of life instrument scores for seventy eight children with hypotonia who underwent surgical intervention for sleep disordered breathing at two tertiary children's hospitals, and analysis of drug-induced sleep endoscopy data using a previously validated scoring system. Results: Children undergoing surgical intervention had baseline severe OSA with a statistically significant improvement in apnea-hypopnea index from 23.6 to 11.1 after surgery, but persistent severe OSA. OSA-18 sleep-related quality of life measurement and overall quality of life score showed statistically and clinically significant improvements, from 72.0 to 43.4 and from 5.3 to 7.6 respectively. Sleep endoscopy showed an average obstructive score of 7.2/15 (n = 39), with multi-level obstruction in 49% of children. Greater than 50% obstruction was observed at the tongue base in 64% of patients, velum in 46%, lateral pharyngeal wall in 38%, supraglottis in 38%, and adenoid in 23%. Conclusion: OSA syndrome is challenging to treat in hypotonic children. Severe residual OSA is common after surgical intervention, but improvement in quality of life is clinically and statistically significant. The tongue base is the most common site of persistent airway obstruction. Drug-induced sleep endoscopy can identify sites of airway obstruction and may aid in surgical planning for high-risk patients. (C) 2016 Elsevier Ireland Ltd. All rights reserved.