0592 Prevalence of Sleep Apnea in Patients with Tracheobronchomalacia

Introduction

Tracheobronchomalacia (TBM) is a pathologic weakness in the trachea and bronchi leading to excessive dynamic narrowing of the airway. A relationship between sleep disordered breathing (SDB) and TBM has been observed before. SBD may be an important contributor to development or progression of TBM. The objective was to determine the Prevalence and characteristics of sleep disordered breathing in patients with tracheobronchomalacia.

Methods

We performed a retrospective chart review of patients who have been diagnosed with tracheobronchomalacia and who also underwent a polysomnogram (PSG) at the AASM - accredited Sleep Center of Beth Israel Deaconess Medical Center.

Results

In our 24 patient cohort of TBM, 71% were females, mean age 55 years (SD ± 12.3 years) and mean BMI 31.7 kg/m2 (SD ± 9.4 kg/m2). In patients with TBM we found a sleep apnea prevalence of 62.5% (n= 15), defined as an apnea-hypopnea index>5/hour (hour) with a desaturation greater than 4%. Of the 15 patients, 73.3% (n = 11) had mild sleep apnea, 20% (n = 3) had moderate sleep apnea, 6.6% (n = 1) had severe sleep apnea, defined per the AASM criteria with oxygen desaturation greater than 4%. The TBM cohort had a mean sleep efficiency of 72.7% (SD ± 22.2%) with a mean REM of 16.3% (SD ± 9.8 %). Other characteristics included a median AHI 3% of 19.9/hour (95% CI 3.9 - 25.0), median AHI 4% of 5.5/hour (95% CI 3.9 - 9.3), Respiratory disturbance index of 22/hour (95% CI 15.1 to 28.4). No unique challenges for treatment with positive airway pressure were noted.

Conclusion

Sleep apnea may be more common in patients with tracheobronchomalacia and could be regularly screened.

Support

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