Congo Red Test

The kidney is an organ that produces and excretes urinary fluids, and has an endocrine function. It can excrete waste generated by metabolism, enter foreign bodies and toxins in the body, and regulate water, electrolytes, and acid-base balance. If there is a disease in the kidney, the above-mentioned substance clearance function is reduced. According to this principle. Some exogenous pigments (dyes) are given artificially to understand renal excretory function. Congo red is a commonly used dye.