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Renal clearance and excretion of endogenous substances in the small pony.
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1975
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Small PonyNutritionVeterinary ResearchEducationLaboratory Animal StudyAnimal StudyRenal FunctionBody CompositionRenal ClearanceRenal ExcretionClinical ChemistryAnimal PhysiologyVeterinary PhysiologyEndogenous SubstancesAnimal NutritionStandard DeviationCreatinine ClearanceRenal PathophysiologyUrologyAnimal SciencePhysiologyAnimal HealthVeterinary ScienceMetabolismMedicineNephrology
Renal clearance and excretion of endogenous substances were studied in 13 small adult ponies (152 plus or minus 93 (standard deviation (SD)) kg). Normal data of serum and urinary concentrations, clearance, and excretion of creatinine, osmolality, free water, sodium, potassium, and chloride during a 12-hour period are presented. Significant linear regressions on body weight (BW) were obtained for creatinine clearance (Ccr (ml/hr) = 127.2 times BW (kg) - 1553), osmolar clearance (Cosm(ml/hr) = 1.81 times BW (kg) m0.3), and free water (CH2O(ml/hr) = - 1.43 BW (kg) - 25.0). Compared with renal excretion of man, kidneys of ponies seem to conserve more sodium and chloride and excrete more potassium.