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Lung diseases

Low MIP/MEP Ratio

06/24/2011

Question:

Hi. My husband has a restrictive lung disease and he was just tested and his mip was at 50% of his Mep. What could this be indicative of? Thank you.

Answer:

MIP is maximum inspiratory pressure and MEP is maximum expiratory pressure; if these numbers are diminished this could indicate weakness of the respiratory muscles. The absolute numbers however are more important than the ratio. For example, a low MIP (usually measured in cmH2O) often indicates diaphragm weakness.

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Response by:

Mahasti   Rittinger, RRT Mahasti Rittinger, RRT
Clinical Program Manager of Pulmonary, Allergy, Critical Care & Sleep
College of Medicine
The Ohio State University