it was easy to lead to nasal synechia when the does of external irradiation being higher or adding intracavitary irradiation or using the decongestant for long time.
鼻咽腔外照射剂量越高,或加做鼻咽腔内照射以及长期过量使用鼻血管收缩剂,容易导致鼻粘连;
objective to analyze the causation of nasal synechia and to explore the preventive method after functional endoscopic sinus surgery.