renal damage in thrombotic thrombocytopenia

例句：

1. 1. The patient's kidney function was severely impaired due to the infection.
   由于感染，患者的肾功能严重受损。
2. 2. Kidney damage can lead to serious health problems if left untreated.
   未经治疗的肾损害可能导致严重的健康问题。
3. 3. The patient required dialysis to treat his renal damage.
   这位患者需要透析来治疗他的肾损害。