Urine concentration and dilution test

The urine concentration and dilution function test is an auxiliary examination method used to check whether the urination function is normal. The urine concentration and dilution test is to observe the body's ability to condense urine from the distal tubules in the absence of water. By measuring the specific gravity of the urine, the function of the distal tubules to concentrate urine can be understood. In the clinical urine concentration and dilution function tests, diurnal urine specific gravity measurement is generally used, but judging the concentration of renal tubules based on urine specific gravity, the dilution function is often not accurate. Therefore, in recent years, some people have suggested using pure water to remove Rate to evaluate renal concentration and dilution. Dilution test is an additional method to check the water-liquid balance in the body.