Optoelectronic plethysmography compared to spirometry during maximal exercise

Aimee M. Layton, Sienna L. Moran, Carol Ewing Garber, Hilary F. Armstrong, Robert C. Basner, Byron M. Thomashow, Matthew N. Bartels

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The purpose of this study was to compare simultaneous measurements of tidal volume (Vt) by optoelectronic plethysmography (OEP) and spirometry during a maximal cycling exercise test to quantify possible differences between methods.Vt measured simultaneously by OEP and spirometry was collected during a maximal exercise test in thirty healthy participants. The two methods were compared by linear regression and Bland-Altman analysis at submaximal and maximal exercise. The average difference between the two methods and the mean percentage discrepancy were calculated.Submaximal exercise (SM) and maximal exercise (M) Vt measured by OEP and spirometry had very good correlation, SM R=0.963 (p<0.001), M R=0.982 (p<0.001) and high degree of common variance, SM R2=0.928, M R2=0.983. Bland-Altman analysis demonstrated that during SM, OEP could measure exercise Vt as much as 0.134L above and -0.025L below that of spirometry. OEP could measure exercise Vt as much as 0.188L above and -0.017L below that of spirometry. The discrepancy between measurements was -2.0±7.2% at SM and -2.4±3.9% at M.In conclusion, Vt measurements at during exercise by OEP and spirometry are closely correlated and the difference between measurements was insignificant.

Original languageEnglish (US)
Pages (from-to)362-368
Number of pages7
JournalRespiratory Physiology and Neurobiology
Issue number2
StatePublished - Jan 5 2013
Externally publishedYes


  • Exercise
  • Spirometry
  • Submaximal exercise
  • Validation
  • Ventilatory volumes

ASJC Scopus subject areas

  • General Neuroscience
  • Physiology
  • Pulmonary and Respiratory Medicine


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