Postoperative complication like chest infection is frequent because the patient has difficulty to cough and clear the sputum due to wound pain 同时，病人由于伤口疼痛，会有咳嗽困难，无法清除痰液，往往会出现一些手术后并发症例如胸部发炎。
2.
This paper reports the different laser operation methods . the treatment results are generally satisfactory . the complication after laser therapy and prognosis were discussed 报道了不同的激光手术，治疗效果通常满意，并对激光手术后并发症及治疗作了讨论。
