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  • Title: Trajectory of ambulatory blood pressure after adenotonsillectomy in children with obstructive sleep apnea: comparison at three- and six-month follow-up.
    Author: Kang KT, Chiu SN, Lin CY, Weng WC, Lee PL, Hsu WC.
    Journal: Sleep Med; 2020 Jan; 65():127-133. PubMed ID: 31751907.
    Abstract:
    OBJECTIVE: Limited information is currently available on 24-h ambulatory blood pressure (ABP) changes after adenotonsillectomy (T&A) in children with obstructive sleep apnea (OSA). In this study, the trajectory of 24-h ABP changes after surgery in children with OSA was examined at three-month and six-month follow-up. METHODS: Children aged 4-16 years with clinical symptoms of OSA and polysomnography (PSG)-diagnosed OSA (apnea-hypopnea index [AHI] >1) were included. All the children received T&A. PSG was conducted before and after surgery. Twenty four hour ABP was monitored using the linear mixed model before, three months after, and six months after surgery. RESULTS: In total, 122 children were examined (mean age: 7.9 years; 71% were boys). The AHI significantly decreased from 12.7 ± 16.7 to 2.4 ± 3.2 events/h after T&A (P < 0.001). Overall diastolic blood pressure (DBP; from 65.1 to 63.4 mmHg, P = 0.01) and night-time DBP (from 57.4 to 55.4 mmHg, P = 0.032) decreased nonsignificantly during the six-month postoperative period. The OSA children with presurgical hypertension exhibited significant reductions in overall systolic blood pressure (SBP), overall DBP, daytime DBP, night-time SBP, and night-time DBP at the three-month and six-month postoperative follow-up (all P < 0.05). The three-month and six-month ABP data did not differ significantly in the entire cohort, even between children with presurgical hypertension and non-hypertensive children. CONCLUSION: The 24-h ABP decreased significantly in the OSA children with hypertension at three and six months after surgery. Moreover, ABP findings did not differ significantly between the three- and six-month follow-up.
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