Prevalence of obstructive sleep apnea syndrome in patients with lymphedema referred for complete decongestive therapy

Abstract

ObjectiveObstructive sleep apnea (OSA) syndrome is one of the most frequent chronic diseases in the general population. The nocturnal rostral fluid shift is accepted as a key mechanism in OSA pathogenesis in medical conditions associated with fluid overload. The main objective of this study was to assess the prevalence of OSA in patients with lymphedema. MethodsA prospective study was conducted in patients with lymphedema hospitalized for complete decongestive therapy between December 2016 and November 2017. A nocturnal respiratory polygraphy, an Epworth sleepiness scale, and lymphedema volume measurements were performed on the first day of decongestive therapy. OSA was diagnosed in patients with an apnea-hypopnea index of five or more events per hour and patients who had been previously diagnosed with OSA and treated by continuous positive airway pressure were identified. ResultsForty-three patients completed the study. The prevalence of OSA was 74% and was higher for patients with lymphedema of the lower limbs (85%) vs upper limbs (56%). OSA severity was correlated with a marker of lower limb lymphedema severity (P = .012). The body mass index was higher than in patients with OSA than patients without OSA (median, 31.0 kg/m2 [25th; 75th percentiles, 25.3; 37.0 kg/m2] vs median, 24.2 kg/m2 [25th; 75th percentiles, 22.7; 26.7 kg/m2]; P < .01). Hypertension was prevalent in 47% of patients with OSA vs 18% in patients without OSA. ConclusionsPatients with lymphedema presenting for complete decongestive therapy present a high prevalence rate of OSA, particularly in those with lower limb lymphedema. OSA severity was correlated with a marker of lower limb lymphedema severity. These results suggest that overweight and obese patients with lymphedema should be screened systematically for OSA.