How does kidney failure occur?

The old lady has regular physical examinations every year, and her family doctor visits her from time to time to do some basic examinations. The last time Shen Qinghuan took the old lady's pulse, he did not find this phenomenon.

The doctor looked very solemn, and everyone present was so worried and nervous that they didn't dare to relax at all.

Shen Qinghuan: "Can you show me the inspection report?"

Doctor: “Who are ...