B. Check uremia

Uremia can be diagnosed by B-ultrasound. However, ultrasound examination can clearly provide the size of the kidney, the shape of the renal capsule, the thickness of the renal parenchyma and the strength of the echo, which can provide help for the clinical differentiation of acute and chronic failure.

If B-ultrasound examination shows that the volume of both kidneys is reduced, the cortical medulla is thinned, and the cortical medulla is unclear, it usually indicates chronic damage to the kidney. However, whether uremia has reached the uremic stage, it is necessary to improve the relevant examinations such

as urea nitrogen, serum creatinine, cystatin C, etc. are commonly used in clinical practice, and the glomerular filtration rate is calculated by various formulas combined with race, age, gender, etc. Uremia refers to glomerular filtration rate