stylet sac

例句：

1. 1. The surgeon removed the stylet sac to examine the wound.
   外科医生取出导管囊来检查伤口。
2. 2. The patient's blood pressure was elevated, and the doctor ordered a blood test.
   病人的血压升高了，医生下令进行血液测试。
3. 3. During surgery, the surgeon carefully removed the stylet sac to prevent infection.
   手术中，外科医生小心翼翼地取出导管囊以防止感染。