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Comparison of analyses of respiratory gases made with the K4b2 portable and Quark laboratory analysers in horses
  1. P-M. Leprêtre, PhD1,
  2. N. Metayer, MS2,5,
  3. G. Giovagnoli, DVM, PhD3,
  4. E. Pagliei, MS4 and
  5. E. Barrey, DVM, PhD2,5
  1. 1 Laboratoire de Recherche ‘Adaptations Physiologiques à l'Exercice et Réadaptation à l'Effort’, Faculté des Sciences du Sport, Université de Picardie Jules Verne, Allée P. Grousset 80025 Amiens Cedex 1, France
  2. 2 Unité de Biologie Intégrative des Adaptations à l'Exercice, INSERM 902, Genopole, Université d'Evry, Val d'Essonne, 3 Impasse Christophe Colomb, 91000 Evry, France
  3. 3 Italian Equestrian Federation, Viale Tiziano 74, 00196 Rome, Italy
  4. 4 COSMED, Via Dei Piani Di Monte Savello 37, Pavona Di Albano, 00196 Rome, Italy
  5. 5 Institut National de la Recherche Agronomique, Génétique Animale et Biologie Intégrative, 78352 Jouy-en-Josas, France
  1. pierre-marie.lepretre{at}


Measurements of minute ventilation (VE) and expired oxygen and carbon dioxide fractions (FeO2 and FeCO2) were measured at rest and during exercise in seven warmblood horses performing two consecutive standardised incremental treadmill exercise tests at submaximal speed, using the portable K4b2 telemetric unit and the laboratory Quark metabolic cart in random order. Oxygen consumption (VO2) and carbon dioxide production (VCO2) were estimated using the Haldane equation. There were no significant differences between the measurements made with the two devices. However, VE was overestimated when the horses were cantering at 10 m/s in comparison with values available in the literature.

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