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Related Experiment Videos

Pitfalls in acid/base experiments with conscious dogs.

A J Langbroek1, A Nijmeijer, P Rispens

  • 1Department of Physiology, University of Groningen, The Netherlands.

Pflugers Archiv : European Journal of Physiology
|October 1, 1990
PubMed
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Human contact and feeding can alter a dog's blood gases, including arterial PO2 and pH. Blood sampling in conscious dogs requires habituation and consistent timing relative to feeding for accurate physiological measurements.

Area of Science:

  • Veterinary Physiology
  • Animal Behavior

Background:

  • Assessing physiological parameters in conscious animals requires understanding factors that may influence results.
  • Behavioral responses to stimuli can impact physiological states.

Purpose of the Study:

  • To investigate the effects of human contact and feeding on arterial pH and blood gas values in conscious dogs.
  • To establish optimal conditions for blood sampling in canine research.

Main Methods:

  • Arterial blood gases (pH, PCO2, PO2), oxygen saturation, and hemoglobin were measured in conscious dogs via indwelling aortic catheter.
  • Measurements were taken at intervals following initial human contact and before/after feeding.

Main Results:

  • Initial human contact led to significant declines in arterial PO2, oxygen saturation, and hemoglobin within 90 minutes.

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  • Feeding induced a metabolic alkalosis and a trend towards higher PCO2 within 2 hours.
  • Acid-base status was affected, with decreased pH and increased PCO2 during non-respiratory acidosis.

    • Conclusions:

    • Behavioral changes in dogs due to human contact and feeding can cause significant, transient alterations in blood gas parameters.
    • Blood sampling protocols should include habituation periods and consistent timing relative to feeding to ensure reliable data.
    • Establishing a steady state through serial sampling is recommended for accurate physiological assessment.