方法：2009-12/2012-12来本院就诊的慢性泪囊炎患者56例60眼，分为两组，在局部麻醉下将泪道再通管逆行置入鼻泪管内，A组术后1.5mo拔管，B组术后3mo及以上拔管，拔管后随访6mo，观察其有效率及并发症发生情况。

结果：所有患者均顺利置入泪道再通管。有效率：A组：共32眼，32眼者拔管时泪道冲洗均通畅。拔管后6mo，治愈21眼(66%)，好转6眼(19%)，无效5眼(16%)，有效率84%。B组：共28眼，28眼患者拔管时27眼泪道冲洗均通畅。拔管后6mo，治愈16眼(57%)，好转5眼(18%)，无效7眼(25%)，有效率75%。两组比较差异无统计学意义(P>0.05)。并发症的发展：A组2眼，B组5眼，两组比较差异无统计学意义(P>0.05)。

结论：泪道再通硅胶管留置在泪道内不同时间比较，1.5，3mo及以上者术后有效率相仿，肉芽增殖较少。

METHODS: From December 2009 to December 2012, 56 patients(60 eyes)with chronic dacryocystitis were studied. Silicone tube was placed for 1.5 months(group A)or more than 3 months(group B), and the follow-up was 6 months after extubation.

RESULTS: All eyes were successfully placed silicone tube. In group A(32 eyes), all lacrimal passage were unobstructed after extubation, after 6 months of postextubation, 21 eyes were cured(66%), 6 eyes were improved(19%), 5 eyes were failed(16%), the overall successful rate was 84%. In group B(28 eyes), 27 eyes of lacrimal passage were unobstructed after extubation, after 6 months of postextubation, 16 eyes were cured(57%), 5 eyes were improved(18%), 7 eyes were failed(25%), the overall successful rate was 75%. The difference between two groups had not statistically significance(P>0.05). Two eyes in group A and 5 eyes in group B had complications with no statistically significance(P>0.05).

CONCLUSION: With the time of silicone tube in lacrimal passages before extubation, 1.5 months or more than 3 months, the effective rate were similar, the granulation tissue proliferation is less in the former group.