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  • Title: Sleep-disordered breathing in school-aged children with Prader-Willi syndrome.
    Author: Schaefer J, Davey MJ, Nixon GM.
    Journal: J Clin Sleep Med; 2022 Apr 01; 18(4):1055-1061. PubMed ID: 34870583.
    Abstract:
    STUDY OBJECTIVES: Studies of sleep-disordered breathing (SDB) in children with Prader-Willi syndrome (PWS) have focused on early childhood and growth hormone (GH)-naïve children, but little is known about older children, including those on long-term GH therapy. This study aimed to describe the nature and prevalence of SDB in school-aged children with PWS in the growth hormone era. METHODS: This retrospective single-center chart review included children aged 6-18 years with PWS who had overnight polysomnography not involving respiratory support over 5 years (2012-2017). The main outcome measures were the presence of obstructive sleep apnea, central sleep apnea, or hypoventilation defined by an elevated transcutaneous partial pressure of carbon dioxide (TcPCO2) as per standard pediatric criteria. RESULTS: Seventeen children (8 males; median age 11.6 years, range 6.6-16.1 years) were included. Fifteen demonstrated SDB of different types: central sleep apnea (18%), obstructive sleep apnea (24%), both obstructive and central sleep apnea (29%), or hypoventilation without obstructive or central sleep apnea (18%). Twelve (71%) children had evidence of hypoventilation. Those with hypoventilation had a higher central apnea-hypopnea index but no difference in the obstructive apnea-hypopnea index, age, sex, growth parameters, or the presence of scoliosis or sleep-related symptoms compared with those without hypoventilation. CONCLUSIONS: Sleep-related hypoventilation is common in school-aged children with PWS. The presence of central sleep apnea, including the quantification of central hypopneas, but not obstructive sleep apnea or clinical factors, predicted the presence of hypoventilation. Long-term polysomnography surveillance in children with PWS should include identification of central hypopneas and measurement of continuous pCO2. CITATION: Schaefer J, Davey MJ, Nixon GM. Sleep-disordered breathing in school-aged children with Prader-Willi syndrome. J Clin Sleep Med. 2022;18(4):1055-1061.
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