What are technical considerations for performance of respiratory muscle strength assessment in pulmonary function testing?

Updated: May 14, 2020
  • Author: Kevin McCarthy, RPFT; Chief Editor: Nader Kamangar, MD, FACP, FCCP, FCCM  more...
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Answer

Answer

All tests are dependent on effort and technique. Good instruction, vigorous coaching, and adequate rest between efforts are essential. Maximum values should be reproducible within the greater of 10% or 5 cm water pressure. A controlled leak (1 mm diameter, 15 mm length) must be part of the system to prevent erroneously high MIP readings resulting from the use of cheek muscles. This leak is not needed for MEP or SNIF pressure measurements.


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