Residual OSA in Down syndrome: does body position matter?

Area of Science:

• Pediatrics
• Sleep Medicine
• Genetics

Background:

• Obstructive sleep apnea (OSA) is common in children with Down syndrome.
• Adenotonsillectomy is a primary treatment for OSA in this population, but residual OSA can persist.
• The role of body position in residual OSA in children with Down syndrome is not well understood.

Purpose of the Study:

• To investigate the prevalence of positional obstructive sleep apnea (POSA) in children with Down syndrome who have residual OSA after adenotonsillectomy.
• To determine if sleeping position influences the severity of residual OSA in this cohort.

Main Methods:

• Retrospective chart review of children with Down syndrome post-adenotonsillectomy with residual OSA (Obstructive Apnea-Hypopnea Index > 1 event/h).
• Patients were categorized by sleep position: mixed, nonsupine, or supine.
• Positional OSA was defined by a specific ratio of supine to nonsupine events.

Main Results:

• 165 children met inclusion criteria; 130 had mixed sleep.
• Supine sleepers exhibited a significantly higher Obstructive Apnea-Hypopnea Index (OAHI) compared to mixed and nonsupine sleepers (P = .002).
• Among those with mixed sleep, 46% had positional OSA, and sleeping off their backs reduced OSA severity in 48% of moderate/severe cases.

Conclusions:

• Children with Down syndrome and residual OSA are more likely to have positional OSA.
• The OAHI may underestimate OSA severity if supine sleep is not considered.
• Positional therapy is a potential management strategy for residual OSA in this population and warrants further research.