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  • Title: Overnight delivery of hypertonic saline by nasal cannula aerosol for cystic fibrosis.
    Author: Corcoran TE, Godovchik JE, Donn KH, Busick DR, Goralski J, Locke LW, Markovetz MR, Myerburg MM, Muthukrishnan A, Weber L, Lacy RT, Pilewski JM.
    Journal: Pediatr Pulmonol; 2017 Sep; 52(9):1142-1149. PubMed ID: 28737262.
    Abstract:
    AIM: Inhaled hypertonic saline increases mucociliary clearance, improves pulmonary function, and decreases exacerbations in cystic fibrosis (CF) but contributes to the already significant treatment burden of CF. Overnight delivery of inhaled medications via a specially designed nasal cannula-aerosol device (Trans-nasal Pulmonary Aerosol Delivery [tPAD]) is an alternative approach. Here, we test whether overnight inhalation of hypertonic saline via tPAD improves mucociliary clearance and assess the tolerability of the device. METHOD: In this study, 12 CF subjects inhaled 7% hypertonic saline (HS) for 8 h overnight using the tPAD system. Safety and tolerability were assessed and measurements of mucociliary and absorptive clearance (MCC/ABS) were performed after the treatment. Comparisons were made versus sham treatment where the same subjects wore the nasal cannula overnight but did not receive aerosol. RESULTS: Both the HS and sham treatments were well-tolerated. Only one subject did not complete the overnight HS treatment. There were no significant differences in MCC associated with HS inhalation at any time point (90 min, 3 h, 6 h) in any lung zone. Changes in FEV1 on both study days were similar. There were no differences in quality of sleep between HS and sham nights as assessed with the modified Leeds Sleep Evaluation Questionnaire (mLSEQ). Sino-Nasal Outcome Test (SNOT-14) questionnaires demonstrated significant increases (worsening) in 2/14 symptom categories with HS. CONCLUSIONS: The most likely cause for the failure to accelerate MCC was under-dosing of HS relative to the active transport of salt from the airways.
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