What does that mean? 那是什么意思

307. Your BUN and creatinine elevations had us worried...
     你的血尿素氮和肌酐都升高了 我们担心
308. about rapidly progressive glomerulonephritis...
     急进性肾小球肾炎...
309. which could signal autoimmune disease.
     很可能是自身免疫病的信♥号♥♥...
310. What does that mean?
     那是什么意思
311. We're not amputating your leg.
     我们不会给你截肢了
312. You keep your kidneys.
     你保住你的肾了
313. Congratulations. you can go home today.
     恭喜 你今天可以回家了

来自《实习医生格蕾 第一季 第二集 Grey's Anatomy S01E02》第 310 行