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  1. Improving detection of obstructive sleep apnoea by overnight oximetry in children using pulse rate parameters
    Sahadan DZ, Davey MJ, Horne RS, Nixon GM
    Sleep Breath, 2015 Dec;19(4):1409-14.
    PMID: 25739713 DOI: 10.1007/s11325-014-1108-4
    PURPOSE: Overnight oximetry is a simple tool for investigation of obstructive sleep apnoea (OSA) in children, but only severe cases will be detected, and children with obstructive events resulting in arousal, but not desaturation, will have a normal (inconclusive) result. We hypothesised that pulse rate rises using pulse rate indices per hour (PRI) and pulse rate standard deviation (PR-SD) automatically calculated from commercially available software would improve oximetry as a diagnostic tool.

    METHODS: Children having home overnight oximetry for suspected OSA were identified over 12 months, and those with a normal result who went on to have polysomnography (PSG) were included. Oximetry, including PR-SD and PRI (rises of 8, 10 and 15 beats/min per hour), was analyzed using commercially available software. PR parameters were compared between those with OSA (obstructive apnoea-hypopnoea index (OAHI) >1 event/h) and those without OSA.

    RESULTS: One hundred sixteen children had normal oximetry, of whom 93 (median age 4.5 years; 55 % M) had PSG. Fifty-seven of 93 (61 %) children had OSA (median OAHI 4.5 events/h, range 1.1-24). PR-SD was not different between the OSA and non-OSA groups (p = 0.87). PRI tended to be higher in those with OSA, but there was considerable overlap between the groups: PRI-8 (mean ± SD 58.5 ± 29.0/h in OSA group vs 48.6 ± 20.2/h in non-OSA group, p = 0.07), PRI-10 (45.1 ± 25.0 vs 36.2 ± 16.7, p = 0.06) and PRI-15 (24.4 ± 14.5 vs 18.9 ± 9.0, p = 0.04). A PRI-15 threshold of >35/h had specificity of 97 % for OSA.

    CONCLUSION: The PRI-15 shows promise as an indicator of OSA in children with normal oximetry.

  2. Fulltext Case series of foreign body aspiration in Paediatric Institute, Hospital Kuala Lumpur
    Sahadan DZ, Zainudin NM, Kassim A, Zahari Z, Mahadzir M, Daud CZ, et al.
    Med J Malaysia, 2011 Dec;66(5):484-6.
    PMID: 22390106 MyJurnal
    A retrospective case series was conducted to determine the clinical characteristics and bronchoscopy findings of children with foreign body aspiration in Paediatric Institute, Hospital Kuala Lumpur. Ten boys and two girls were included (range 2-177 months; median 26 months old). They commonly presented with cough (12/100%) and difficulty in breathing (9/75%). All patients had unilateral auscultatory findings and the commonest radiographic findings were unilateral hyperinflation (7/58.3%). The majority of foreign bodies removed was organic (8/66.6%) and more frequently found in the left bronchial tree (7/58.3%). Major complications were pneumonia (11/91.6%) and airway oedema (11/ 91.6%). Eight patients had delayed diagnosis due to parents unawareness (6/50%) and missed diagnosis (2/16.7%).
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