Inulin clearance

Inulin is an exogenous plant polysaccharide. It does not participate in metabolism in the body, can pass freely through the glomeruli, is filtered through the glomeruli, and is not secreted or reabsorbed by the renal tubules. It is ideal for measuring glomerular filtration function. Source substance. Cin accurately reflects GFR. This test has become the standard method for clinical examination of glomerular filtration function. However, some people believe that in renal tubular dysfunction, inulin can retrogradely diffuse into renal tubules and affect GFR.