How can you assess respiratory muscle function at the bedside?

Bottom line:  Measuring maximum inspiratory pressure and maximum expiratory pressure can provide information on respiratory muscle weakness and can be used at the bedside for monitoring patients who may be at risk for respiratory failure.

Table 24-10. In:  Murray and Nadel’s Textbook of Respiratory Medicine, 5th ed.
Summarizes methods for assessing respiratory muscle weakness.  PImax (maximal inspiratory pressure) and PEmax (maximal expiratory pressure) are two tests that can be performed at the bedside  that can provide some information about muscle function, but they have poor positive predictive value.

Video of procedure for measuring negative inspiratory force, also known as maximum inspiratory pressure.

Maximal Inspiratory and Expiratory Pressures.  In:  Murray and Nadel’s Textbook of Respiratory Medicine, 5th ed.
Describes the procedure and how monitoring can be used to monitor patients with neuromuscular discorders, such as GBS, to identify development of respiratory failure.

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About Amy

Clinical Informationist at EUH Branch Library
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