Software compensation for lung volume in assessment of inspiratory muscle strength and endurance.
other · Level V
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- Record sourced from PubMed, PMID 7660333.
- Also identified by PMC identifier 1021183.
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Abstract
To increase the sensitivity of measurements of maximal inspiratory pressure (MIP) as a test of inspiratory muscle strength and endurance, software was developed to correct for variation in lung volume. Using a body plethysmograph to determine absolute lung volume during each manoeuvre, values for MIP were expressed as a percentage of the pressure "expected" from the unfatigued MIP/lung volume relation in each subject. The method reduced the variance in peak and average pressure during a series of 18 MIP manoeuvres of 10 seconds duration separated by rest intervals of 10 seconds. The correlation between average pressure and contraction number was improved significantly by the MIP/lung volume correction. This simple correction has many applications in measurements of the MIP.
Medical subject headings
- Lung Volume Measurements
- Respiratory Mechanics
- Respiratory Muscles
- Signal Processing, Computer-Assisted
- Software