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Veterinary research communications1988; 12(1); 25-39; doi: 10.1007/BF00396401

A critical assessment of pulmonary function testing in exercising ponies.

Abstract: Pulmonary function measurements during exercise were tested for accuracy and reproducibility in 5 saddle ponies weighing 267 +/- 9 Kg. Airflow (V) and tidal volume (VT) were measured with a Fleisch pneumotachograph mounted on a face mask. The linearity of the response and the symmetry of this device were carefully checked. Pleural pressure changes were measured by pleural puncture (Ppl) and with an esophageal balloon catheter (Pes). The elastance of the esophageal wall and the effect of the position of the esophageal catheter tip on Pes were also investigated. Airflow, VT, Ppl, Pes, mask pressure, an electrocardiogram and limb movements were simultaneously recorded before, during and after exercise. These recordings were used to assess the validity of some pulmonary function measurements and to evaluate the influence of the breathing apparatus on the respiratory pattern. Maximal intrathoracic pressure changes and total pulmonary resistance values did not differ significantly when calculated on the basis of the Ppl and the Pes curves respectively. Although the absolute Ppl values were significantly different from the absolute Pes values, both pressures recorded at different workloads were closely correlated (R = 0.99). The mean specific elastance of the esophagus was 1.56 +/- 0.24 kPa.cm.ml.-1. Changes in the position of the esophageal catheter tip induced significant differences in the recorded Pes values. The pressure/flow relationship of the pneumotachograph pressure transducer system was linear within the range of the V measured during exercise. The mask had a significant influence on respiratory frequency and maximum difference in Pes, but did not modify the exercise-induced changes in these parameters. It was concluded that the technique and methods used in this study can allow accurate pulmonary function measurements in exercising ponies.
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Publication Date: 1988-01-01 PubMed ID: 3176337DOI: 10.1007/BF00396401Google Scholar: Lookup
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Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research paper presents a detailed investigation to determine the accuracy and reproducibility of pulmonary function measurements in exercising ponies. Various techniques were deployed to measure parameters like airflow, tidal volume, and pleural pressure changes, and their influence on the respiratory pattern was evaluated. The experiments concluded that the methodologies used in this study provided accurate pulmonary function measurements in exercising ponies.

Overview of the Study

  • The study focuses on testing pulmonary function in saddle ponies, specifically during exercise. The main parameters observed were airflow, tidal volume, and pleural pressure changes.
  • The ponies’ weight was recorded as an average of 267 +/- 9 Kg for the five saddle ponies. A Fleisch pneumotachograph mounted on a face mask was used to measure the airflow and tidal volume.
  • Various methods were used to measure pleural pressure changes including pleural puncture and an esophageal balloon catheter. The study heavily focuses on checking the linearity, symmetry, and other device responses.

Testing Methods and Results

  • The investigators simultaneously recorded airflow, tidal volume, pleural pressure measurements, mask pressure, an electrocardiogram, and limb movements before, during, and after exercise. The purpose was to evaluate the validity of pulmonary function measurements and assess the breathing apparatus’s impact on the ponies’ respiratory pattern.
  • The paper reports on the comparison between maximal intrathoracic pressure changes and total pulmonary resistance values gathered from the pleural puncture and the esophageal balloon catheter. It was found that both pressures recorded similar results at different workloads.
  • Although the absolute values of pleural pressure were significantly different depending on the method used to record them, the research found them to be closely correlated, with a correlation coefficient (R) of 0.99.

Observations and Conclusion

  • Findings from the investigation revealed that the pressure/flow relationship of the pneumotachograph pressure transducer system was linear within the range of the airflow measured during exercise.
  • Significant differences were recorded in the pleural pressure values when the esophageal catheter tip position was changed. The study also identified that the mask used significantly impacted the ponies’ respiratory frequency and maximum change in pleural pressure.
  • The study concluded the techniques and methodology used are effective in making accurate pulmonary function measurements in ponies during exercise, despite the impact of certain elements such as the mask and catheter position.

Cite This Article

APA
Art T, Lekeux P. (1988). A critical assessment of pulmonary function testing in exercising ponies. Vet Res Commun, 12(1), 25-39. https://doi.org/10.1007/BF00396401

Publication

Veterinary research communications
ISSN: 0165-7380
NlmUniqueID: 8100520
Country: Switzerland
Language: English
Volume: 12
Issue: 1
Pages: 25-39

Researcher Affiliations

Art, T
  • Laboratory for Cardio-Pulmonary Functional Investigation, Faculty of Veterinary Medicine, University of Liege, Brussels, Belgium.
Lekeux, P

    MeSH Terms

    • Animals
    • Heart Rate
    • Horses / physiology
    • Lung / physiology
    • Physical Exertion
    • Pulmonary Ventilation
    • Respiratory Function Tests / methods
    • Respiratory Function Tests / veterinary
    • Rest

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    Citations

    This article has been cited 3 times.
    1. Crivellari B, Raisis A, Hosgood G, Waldmann AD, Murphy D, Mosing M. Use of Electrical Impedance Tomography (EIT) to Estimate Tidal Volume in Anaesthetized Horses Undergoing Elective Surgery. Animals (Basel) 2021 May 10;11(5).
      doi: 10.3390/ani11051350pubmed: 34068514google scholar: lookup
    2. Art T, Lekeux P. Pulmonary mechanics during treadmill exercise in race ponies. Vet Res Commun 1988;12(2-3):245-58.
      doi: 10.1007/BF00362807pubmed: 3188391google scholar: lookup
    3. Doucet MY, Vrins AA, Ford-Hutchinson AW. Histamine inhalation challenge in normal horses and in horses with small airway disease. Can J Vet Res 1991 Jul;55(3):285-93.
      pubmed: 1889039
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