Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
术前造影以了
泪囊的大小和阻塞的部位，以选择最佳手术适应证。
态: preformed, preforming, preforms Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
术前造影以了泪囊的大小和阻塞的部位，以选择最佳手术适应证。
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