Concurrent Validity of a Low-Cost Manometer for Objective Assessments of Respiratory Muscle Strength

Details

• Alternative Title:
  Laryngoscope
• Personal Author:
  Curtis, James A. ; Mocchetti, Valentina ; Rameau, Anaïs
• Description:
  Objective(s):
  
  This study examined the agreement in maximal expiratory (MEP) and inspiratory (MIP) pressure readings between two digital manometers: (1) the MicroRPM – the gold standard manometer for respiratory muscle strength testing; and (2) the LDM – a low-cost, commercially available, alternative manometer.
  
  Methods:
  
  Positive (MEP) and negative (MIP) pressures were simultaneously applied to the MicroRPM and LDM using a 3-liter syringe within a controlled laboratory setting. Pressure readings were compared, and agreement was analyzed using Lin’s concordance correlation (ρc). Agreement was interpreted as ‘poor’ if < 0.90, ‘moderate’ if 0.90 – < 0.95, ‘substantial’ if 0.95 – < 0.99, and ‘excellent’ if ≥ 0.99. Twenty percent of the pressure trials were repeated by a second researcher to examine test-retest reliability.
  
  Results:
  
  A total of 150 trials were completed, ranging from −167 to +208 cmH2O. There was a median absolute difference of 0.3 cmH2O in pressure readings between the MicroRPM the LDM. Lin’s concordance correlation revealed ‘excellent’ agreement between the LDM and MicroRPM devices, with test-retest reliability assessment revealing ‘substantial-to-excellent’ agreement between the LDM and MicroRPM devices, with a concordance correlation coefficient of ρc = 0.999 (95% CI: 0.999 – 0.999).
  
  Conclusions:
  
  There was a median difference of 1.0% in MEP and MIP pressure readings consistently observed between the LDM and MicroRPM. Despite these relatively small differences, excellent agreement between the two manometers was present. These data suggest the LDM may be a valid, lower cost alternative to the MicroRPM for objectively assessing respiratory strength in clinical practice, however additional research is needed in healthy adults and in patient populations.
  
  
• Subjects:
  Adult Exhalation Humans Muscle Strength Reproducibility Of Results Respiratory Muscles
• Keywords:
  Cough LDM MicroRPM Respiratory Strength Swallowing
• Source:
  Laryngoscope. 134(4):1831-1836
• Pubmed ID:
  37837395
• Pubmed Central ID:
  PMC10947978
• Document Type:
  Journal Article
• Funding:
  K76 AG079040/AG/NIA NIH HHSUnited States/ ; OT2 OD032720/OD/NIH HHSUnited States/ ; OT2 OD032720/CD/ODCDC CDC HHSUnited States/
• Volume:
  134
• Issue:
  4
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha-512:22d2c90b3eb1cbce36d5f3623f16fd2a82580e2d9250dd10925dee07f11c2dfd9d3c4acd8c02255a9dbb94e80710103b0c629c4f062e6871564bcfd6c227775e
• Download URL:
  https://stacks.cdc.gov/view/cdc/151756/cdc_151756_DS1.pdf
• File Type:
  [PDF - 1.04 MB ]