Effect of a respiratory gas collection mask on some measurements of cardiovascular and respiratory function in horses exercising on a treadmill.
Abstract: The effects of a respiratory gas collection mask on arterial blood gases, acid base values, oxygen content, respiratory frequency and heart rate, were investigated in standardbred horses during treadmill exercise at speeds up to 10 m sec-1 and a treadmill slope of 10 per cent. The mask had no significant effect on heart rates during exercise, but respiratory frequency was lower when the mask was used. The increase in respiratory frequency as treadmill velocity increased was also significantly slower with the mask operative. Arterial carbon dioxide tensions were significantly higher during exercise with the mask than without, and arterial oxygen tension was significantly lower at the highest exercise intensity. Arterial oxygen content was significantly lower at all work speeds when the mask was used. There were minimal effects of the mask on arterial acid base values. It was concluded that a respiratory gas collection mask caused alveolar hypoventilation in exercising horses, but did not markedly influence heart rate or arterial acid base values during exercise.
Publication Date: 1988-03-01 PubMed ID: 3133730
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- Journal Article
Summary
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This research paper explores how a respiratory gas collection mask affects certain cardiovascular and respiratory metrics in horses exercising on a treadmill. Researchers found that the mask influenced respiration rates and arterial gas tensions, but did not significantly affect heart rates or arterial acid-base levels.
Understanding the Study
- This study involves standardbred horses exercising on a treadmill. Key parameters like arterial blood gases, acid base values, oxygen content, respiratory frequency, heart rates, and respiration rates were monitored and recorded.
- The experiment centered around analyzing the impact of a respiratory gas collection mask, which was worn by the horses during their treadmill exercise. The treadmill speed varied up to 10 m sec-1, and the slope was set to 10 per cent.
- Comparative analyses were conducted on data obtained from masked versus unmasked exercise sessions. The main objective was to deduce any significant changes to heart rate, respiratory rate, and other measures that could be attributable to the mask.
Principal Findings
- The use of the respiratory gas collection mask did not significantly influence the heart rates during exercise. However, there was a noted decrease in respiratory frequency when the mask was in use.
- The rate at which respiratory frequency increased, as the speed of the treadmill increased, was slower when the horses wore the mask.
- The mask had a direct influence on arterial gas tensions as higher levels of arterial carbon dioxide were recorded during exercises completed with the mask on. At the maximum exercise intensity, the arterial oxygen tension was significantly lower.
- Arterial oxygen content overall was notably lower when the mask was used, regardless of the exercise speed.
- The mask had minimal effects on the arterial acid-base values – measurements which help assess the pH balance (acidity or alkalinity) of the horse’s blood.
Conclusions
- Based on the results presented, the researchers concluded that wearing a respiratory gas collection mask induced alveolar hypoventilation in horses engaged in exercise. Alveolar hypoventilation is a condition where there’s an inadequate expulsion of carbon dioxide through the lungs.
- However, the mask did not significantly affect the heart rate or arterial acid-base values during exercise.
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Cite This Article
APA
Evans DL, Rose RJ.
(1988).
Effect of a respiratory gas collection mask on some measurements of cardiovascular and respiratory function in horses exercising on a treadmill.
Res Vet Sci, 44(2), 220-225.
Publication
Researcher Affiliations
- Department of Veterinary Clinical Studies, University of Sydney, New South Wales, Australia.
MeSH Terms
- Acid-Base Equilibrium
- Animals
- Blood Gas Analysis / veterinary
- Body Temperature
- Body Weight
- Carbon Dioxide / blood
- Female
- Heart Rate
- Hemoglobins / analysis
- Horses / physiology
- Hydrogen-Ion Concentration
- Male
- Oxygen / blood
- Physical Exertion
- Reference Values
- Regression Analysis
- Respiration
- Respiratory Function Tests / instrumentation
- Respiratory Function Tests / veterinary
Citations
This article has been cited 2 times.- Gauvreau GM, Young SS, Staempfli H, McCutcheon LJ, Wilson BA, McDonell WN. The relationship between respiratory exchange ratio, plasma lactate and muscle lactate concentrations in exercising horses using a valved gas collection system.. Can J Vet Res 1996 Jul;60(3):161-71.
- Evans DL, Rose RJ. Cardiovascular and respiratory responses to submaximal exercise training in the thoroughbred horse.. Pflugers Arch 1988 Mar;411(3):316-21.
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