In the presence of nephrogenic oedema, it is important to know whether the kidney function is normal or the severity of the abnormality. Clinically, the status of kidney function is often determined by checking for abnormalities in indicators such as serum urea nitrogen, serum creatinine and uric acid. In addition, to deepen the understanding of kidney disease, auxiliary tests such as urine and plasma albumin measurement and kidney ultrasound are also performed.