Accuracy and precision of CPET equipment: a comparison of breath-by-breath and mixing chamber systems

C. Beijst, G. Schep, E. van Breda, P.F.F. Wijn, C. van Pul

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

13 Citaten (Scopus)

Samenvatting

Cardiopulmonary exercise testing (CPET) has become an important diagnostic tool for patients with cardiorespiratory disease and can monitor athletic performance measuring maximal oxygen uptake [Formula: see text]Vo2(; max). The aim of this study is to compare the accuracy and precision of a breath-by-breath and a mixing chamber CPET system, using two methods. First, this study developed a (theoretical) error analysis based on general error propagation theory. Second, calibration measurements using a metabolic simulator were performed. Error analysis shows that the error in oxygen uptake ([Formula: see text]Vo2) and carbon dioxide production (Vco2[Formula: see text]) is smaller for mixing chamber than for breath-by-breath systems. In general, the error of the flow sensor [Formula: see text]δV, the error in temperature of expired air δT(B) and the delay time error δt(delay) are significant sources of error. Measurements using a metabolic simulator show that breath-by-breath systems are less stabile for different values of minute ventilation than mixing chamber systems.

Originele taal-2Engels
Pagina's (van-tot)35-42
Aantal pagina's8
TijdschriftJournal of Medical Engineering & Technology
Volume37
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - jan 2013

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