Assessment of Respiratory Muscle Weakness in Subjects With Neuromuscular Disease.

Introduction: Neuromuscular diseases (NMD) are a group of rare heterogeneous disorders that may be accompanied by respiratory muscle weakness. The simplest measurements of respiratory muscle strength are maximum inspiratory pressure (P) and maximum expiratory pressure (P) of the mouth. Inspiratory muscle weakness can also be evaluated by the sniff test (sniff nasal inspiratory pressure method).