恶心加呕吐,没有胃口: uremic symptom.
急性肾衰竭: a lot of people will recover from acute renal failure.
她的肾有长期的损害: what do you mean? Does she have chronic renal failure or acute? Or the common one is acute on chronic renal failure.
再过三个月验血,GFR几乎是到正常水平: most acute renal failure patient will recover in 3 months (90%), with the treatment, whatever Western or Chinese medication. If she had taken Western medication, she might even recovered in 1 month.
她的血压都正常了: acute renal failure caused hypertension. When renal function recovers, BP will normalize.
Conclusion: simple case report for a good outcome. There are always underreported bad outcome. It is called selection bias scientifically.
Congratulations to your mom-in-law who survived this.