leukapheresis

例句：

1. 1. The procedure involves separating the white blood cells from the patient's bloodstream.
   该程序包括从患者血液中分离白细胞。
2. 2. This treatment is used to remove excess white blood cells and prevent infections.
   这种治疗用于去除过多的白细胞，以防止感染。
3. 3. The leukapheresis process can be painful for patients, so it's important to monitor their comfort levels during the procedure.
   白细胞分离术过程对患者来说可能是痛苦的，因此监测他们在过程中的舒适度是很重要的。