Utility Of diaphragm ultrasound in myopathy

ABSTRACT Introduction Ultrasound (US) evaluation of diaphragm thickness and contractility is an effective tool in neurogenic diaphragm dysfunction. There are limited data about the value of this technique in patients with myopathy. Methods We performed a retrospective chart review of cases with elec...

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Bibliographic Details
Published in:Muscle & nerve 2017-03, Vol.55 (3), p.427-429
Main Authors: O'Gorman, Cullen M., O'brien, Travis G., Boon, Andrea J.
Format: Article
Language:English
Subjects:
diaphragm
Diaphragm - diagnostic imaging
Electromyography
Female
Humans
Male
Muscular Diseases - diagnostic imaging
Muscular Diseases - pathology
myopathy
neuromuscular
Retrospective Studies
sonography
Ultrasonic imaging
Ultrasonography
ultrasound
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Summary:ABSTRACT Introduction Ultrasound (US) evaluation of diaphragm thickness and contractility is an effective tool in neurogenic diaphragm dysfunction. There are limited data about the value of this technique in patients with myopathy. Methods We performed a retrospective chart review of cases with electromyography (EMG) ‐confirmed myopathy and real‐time US evaluation of the diaphragm. Diaphragm thickness and thickening ratio (maximal inspiration/expiration) were measured. Demographic, imaging, pathology, and genetic data were reviewed, and the clinical diagnosis was recorded. Results There were 19 eligible cases, of which 14 (73.7%) had abnormal US findings. Mean diaphragm thickness was 0.12 cm (SD 0.10), and the mean thickening ratio was 1.29 (SD 0.35). In all cases with abnormal US evaluation, the thickening ratio was abnormal. There were no cases with abnormal thickness alone. Conclusions US examination can detect diaphragm dysfunction in myopathy. It is important to measure both the baseline thickness and thickening ratio to maximize sensitivity. Muscle Nerve 55: 427–429, 2017
ISSN:0148-639X
1097-4598
DOI:10.1002/mus.25429