What is the clinical evidence from this study?

Population: Healthy adults (n=34). Intervention: Cardiopulmonary exercise testing using four different metabolic carts vs. Intra- and inter-device comparison. Primary outcome: Intra-device reliability and inter-device comparability of CPET parameters (peak VO2, VE/VCO2 slope).

What does this research mean for the field?

Under standardized conditions, four different metabolic carts demonstrate comparable intra-device reliability and inter-device measurement consistency for cardiopulmonary exercise testing. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the intra-device reliability and inter-device comparability of core cardiopulmonary exercise testing parameters across four widely used metabolic carts.

March 8, 2026European Heart Journal - Quality of Care and Clinical Outcomes

Method Validation of Cardiopulmonary Exercise Testing: Intra- and Inter-Device Comparisons Across Four Metabolic Carts

Q: What are the key findings of this study?

Four different metabolic carts yielded comparable values for intra-device reliability and inter-device comparability of peak VO2 and VE/VCO2 slope up to the respiratory compensation point.

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Key result

Four tested metabolic carts show comparable intra-device reliability and inter-device consistency under standardized conditions.

n=34

Why the study?

Different metabolic carts used for cardiopulmonary exercise testing may introduce systematic variability, confounding longitudinal assessments and multicentre trials.

Are CPET parameters comparable across different metabolic carts and reliable within the same device in healthy adults?

Population

34 healthy adults (35 ± 11 years; 59% males)

Comparison

Intra-device reliability and inter-device comparability of four metabolic carts

Design

Prospective, single-centre, within-subject, repeated-measures, multi-device comparison study with randomized test order

Follow-up

Within 40 days (tests 2-10 days apart)

Authors

RWRobin WillixhoferHeart Failure & Transplant MKMARLUS KARSTENUniversidade do Estado de Santa Catarina AGArianna GalottaHeart Failure & Transplant

Discussion

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Implication

Clinicians can rely on CPET data independent of cart chosen; confirms inter-device reliability for clinical and research use.

Key Points

To evaluate the intra-device reliability and inter-device comparability of core cardiopulmonary exercise testing parameters across four widely used metabolic carts.
Enrolled 34 healthy adults (age 35 ± 11 years; 59% males) who completed eight cycle-ergometer exercise tests (two tests per cart across four systems) in randomized order within a 40-day window.
Evaluated four metabolic systems (MGC Ultima CPX, COSMED Quark CPET, Schiller PowerCube Ergo, and Vyaire Vyntus CPX) using standardized calibration, masks, and 10-second averaged breath-by-breath data.
Assessed intra-device reliability using paired tests and inter-device comparability using repeated-measures ANOVA alongside iso-workload thresholds (25% to 100% of lowest peak workload).
Intra-device reliability showed no significant differences for VO2, heart rate, or workload at anaerobic threshold, respiratory compensation point (RCP), or peak, with minor variances limited to resting VO2 (COSMED: 56 mL/min, P = 0.0427) and peak ventilation (MGC: 9 L/min, P < 0.05).
Inter-device evaluations demonstrated no significant differences in peak VO2 or VE/VCO2 slope calculated up to RCP, whereas full-range VE/VCO2 slope differed significantly across devices (P = 0.0048).
Standardized iso-workload VO2 measurements exhibited significant between-device differences only at the 25% ISO-Wpeak level (P = 0.022), remaining consistent at 50%, 75%, and 100%.

Structured PICO

Are CPET parameters comparable across different metabolic carts and reliable within the same device in healthy adults?

Population

34 healthy adults (mean age 35 years, 41% female) who completed eight cardiopulmonary exercise tests across four different metabolic carts.

Exposure

Cardiopulmonary exercise testing (CPET) using four different metabolic carts (MGC Ultima™ CPX, COSMED Quark CPET™, Schiller PowerCube® Ergo, Vyaire Vyntus™ CPX), 2 tests per cart (8 total per subject)

Comparator

Intra-device and inter-device comparisons

Outcome

Intra-device reliability and inter-device comparability of CPET parameters (peak VO2, VE/VCO2 slope)surrogate

Under standardized conditions, different metabolic carts yield comparable peak VO2 and VE/VCO2 slope (up to RCP) values, supporting their reliable use in longitudinal assessments and multicentre trials.

Cite This Study

Willixhofer et al. (2026) studied Healthy adults (n=34). Cardiopulmonary exercise testing using four different metabolic carts vs. Intra- and inter-device comparison was evaluated on Intra-device reliability and inter-device comparability of CPET parameters (peak VO2, VE/VCO2 slope). Four different metabolic carts yielded comparable values for intra-device reliability and inter-device comparability of peak VO2 and VE/VCO2 slope up to the respiratory compensation point.

synapsesocial.com/papers/69ada8cfbc08abd80d5bc283 https://doi.org/10.1093/ehjqcco/qcag036

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Method Validation of Cardiopulmonary Exercise Testing: Intra- and Inter-Device Comparisons Across Four Metabolic Carts

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Method Validation of Cardiopulmonary Exercise Testing: Intra- and Inter-Device Comparisons Across Four Metabolic Carts

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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