A Comparison of Simultaneously Collected Arterial, Mixed Venous, Jugular Venous and Cephalic Venous Blood Samples in the Assessment of Blood‐Gas and Acid‐Base Status in the Dog

Journal of Veterinary Internal Medicine - Tập 5 Số 5 - Trang 294-298 - 1991
Jan E. Ilkiw1,2, R. J. ROSE3, I.C.A. Martin4
1Department of Surgery, School of Veterinary Medicine, University of California, California
2Department of Surgery School of Veterinary Medicine, University of California, Davis, CA 95616
3Department of Veterinary Clinical Studies, University of Sydney, Australia
4Department of Veterinary Physiology, University of Sydney, Australia

Tóm tắt

Blood samples were collected simultaneously from the pulmonary artery, jugular vein, cephalic vein, and carotid artery in awake dogs. Blood‐gas and acid‐base values were measured from these blood samples in normal dogs and in dogs after production of metabolic acidosis and metabolic alkalosis. The values obtained from each of the venous sites were compared with those obtained from arterial blood to determine if venous blood from various sites accurately reflected acid‐base balance and could therefore be used in the clinical patient. The results of this study demonstrated significant differences between the blood from various venous sites and the arterial site for PCO2 and pH in all acid‐base states. Significant differences for standard bicarbonate (SHCO3) were found only when jugular and cephalic venous blood were compared with arterial blood in dogs with a metabolic acidosis. No significant differences were found for BE when blood from the venous sites was compared with arterial blood. The values for pH, HCO3, TCO2, BE, and SHCO3 measured on blood collected at the various venous sites were found to correlate well with those obtained from arterial blood, with a correlation coefficient of 0.99 for HCO3, TCO2, BE, and SHCO. These correlation coefficients, together with similar values in BE at all collection sites, indicate that, in the dog with normal circulatory status, blood from any venous site will accurately reflect the acid‐base status of the patient.

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