Estimation of glomerular filtration rate by plasma clearance of iohexol in healthy horses of various ages

Abstract Background Plasma clearance of iohexol is a reliable method to assess the glomerular filtration rate (GFR). The relationship between aging and GFR in horses is unclear. Hypothesis/Objectives To compare GFR estimated by iohexol clearance in horses of different ages. Animals Twenty‐one clinically healthy horses were enrolled. Methods Prospective study. Groups: (A) composed by 8 young horses (≤14 years old) with serum creatinine