Composition of canine renal hilar lymph

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Abstract
Lymph was collected from a vessel in the hilar region of the kidney in 33 dogs. Care was taken to leave other renal lymphatics undisturbed. Renal lymph and urine were collected continuously and arterial blood periodically. The renal lymph-to-arterial plasma ratios of all endogenous substances measured were essentially unity except urea, total protein, and calcium, whose ratios were less than one. Intravenously infused PAH and inulin appeared in renal lymph in concentrations of 58 and 80%, respectively, of their concentrations in arterial plasma. In five dogs, both hilar and capsular lymph was collected simultaneously. Sodium concentrations were similar in these samples and in neither was sodium more concentrated than in arterial plasma.

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