dacryocystography

Objective:To illustrate the value of digital subtraction dacryocystography in the diagnosis of lacrimal duct obstruction.

目的:评价数字减道在临床检查道阻塞中的应用价值。

Dacryocystography was preformed in all patients before operation to confirm the obstructive sity and the size of lacrimal sac.

前以了解囊的大小和阻塞的位，以选择最佳手适应证。