两个地方糊涂？

There are some patients who are not candidates for surgery, are in an unstable condition, and have had previous unsuccessful attempts at treating their bronchopleural fistula or in whom the bronchopleural fistula cannot be closed or eliminated. Their air leak will continue for many months. These patients can be treated on a long-term basis with an open window thoracostomy. This can be either an Eloesser flap or a Clagett window with daily packing of the chest cavity. A wound VAC will not work if the bronchopleural fistula is not closed.

有一些患者不适合手术，病情不稳定，之前尝试支气管胸膜瘘治疗但未成功，或者瘘管不能关闭或消除。他们的漏气现象将会持续好几个月。这些患者可以通过胸腔开窗造口术进行长期治疗。胸腔开窗造口术可以是Eloesser皮瓣也可以是每天更换填塞Clagett窗。如果瘘口不愈合，就不能使用伤口VAC。

患者是4类？？

1.不适合手术，2.病情不稳定，3.之前尝试支气管胸膜瘘治疗但未成功，4.或者瘘管不能关闭或消除？

2.either 和or并列？那This指代open window thoracostomy？那an Eloesser flap和a Clagett window 就是open window thoracostomy？

这些患者可以通过胸腔开窗造口术进行长期治疗。胸腔开窗造口术可以是Eloesser皮瓣也可以是每天更换填塞Clagett窗。如果瘘口不愈合，就不能使用伤口VAC。对吗？谢谢