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24.02.2020 | RESPIRATORY MUSCLE PHYSIOLOGY | Ausgabe 2/2020

Lung 2/2020

Peak Cough Flow in Children with Neuromuscular Disorders

Zeitschrift:
Lung > Ausgabe 2/2020
Autoren:
Nidhi Kotwal, Prateek J. Shukla, Geovanny F. Perez
Wichtige Hinweise
This paper has been presented as a meeting abstract titled “Peak Cough Flow Measurements in Children with Neuromuscular Disorders, 5 years experience at Large Tertiary Children Hospital” at the American Thoracic Society International Conference, May, 2017 Washington, DC, USA.
Conference proceedings published in American Journal of Respiratory and Critical Care Medicine 2017; 195:A4128.

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Abstract

Purpose

Patients with neuromuscular disease (NMD) experience weakened cough due to progressive respiratory muscle weakness. Peak cough flow (PCF) measurements derived from adult populations are used to recommend initiation of assisted cough therapies. The objective of this study was to characterize PCF values among pediatric patients with NMD.

Methods

Retrospective chart review was performed for patients seen in the multidisciplinary pediatric muscular dystrophy clinic from 2010 to 2016. Clinical and demographic variables included age, gender, ambulation status, and PCF measurements.

Results

366 patients with an established diagnosis of NMD (median age 11.8 years) were included in this study. 102 (27.8%) out of the 366 patients were affected by Duchenne muscular dystrophy (DMD), 42 (11.5%) by congenital muscular dystrophy (CMD), 42 (11.5%) by Charcot Marie Tooth disease (CMT) and 24 (6.5%) by Becker’s muscular dystrophy (BMD). The mean PCF values in DMD (255.8 L/min) and CMD (249.1 L/min) were lower than CMT (321.5 L/min) with p-values of 0.007 and 0.02, respectively. The mean PCF of BMD (333.3 L/min) was higher than that of DMD and CMD but the difference was not statistically significant. PCFs were not statistically different between ambulatory and non-ambulatory status (263.0 L/min versus 290.8 L/min, p = 0.12). Children under 10 years of age had lower PCF relative to older subjects (179.5 L/min versus 300.9 L/min, p < 0.0001).

Conclusion

Baseline PCF values in young children are below the adult-specific values suggested for starting assisted cough techniques. Further longitudinal trials are required to derive pediatric-specific reference values for PCF in patients with NMD.

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