Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
造影
了解泪囊的大小和阻塞的部位，选择最佳手适应证。
Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.
造影了解泪囊的大小和阻塞的部位，选择最佳手适应证。
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