Background/Aim Dacryocystorhinostomy (DCR) remains the gold standard therapy for nasolacrimal duct obstruction (NLDO), but is invasive and does not maintain the physiology of the lacrimal pathway. With transcanlicular microdrill dacryoplasty (MDP), there is a minimally invasive alternative surgical approach. This study aimed to present this modern lacrimal duct surgery technique and to evaluate its long-term success rate in a large study population. Methods The medical records of 1010 patients with acquired NLDO were retrospectively reviewed. Adult patients who had undergone transcanalicular MDP were included. The evaluation included the following parameters: age, gender, success rate, complication rate, obstruction grade and patient satisfaction. Long-term results regarding patient satisfaction and success rate were evaluated by a telephone survey. Only a complete resolution of symptoms was defined as success. Results 793 eyes of 576 patients after transcanalicular MDP could be included in the study. The mean follow-up time was 8.7±0.9 years. Initial surgical success rate was 84.0%. At the time of the follow-up, 57.5% (n=229) still had full resolution of symptoms. The mean patient satisfaction with the procedure was 6.9±3.2 out of 10 points. Heavy bleeding occurred in two cases only (0.25%). Conclusion This is the first study to show the success rate of microendoscopic lacrimal duct surgery after such a long follow-up period and in such a large study population. Transcanalicular MDP is a minimally invasive technique with a very low complication rate and can be used as an alternative procedure before performing more invasive lacrimal duct surgery such as DCR.

中文翻译：

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经小管微钻泪囊成形术的长期结果：泪囊鼻腔吻合术的微创替代方案

背景/目的 泪囊鼻腔吻合术 (DCR) 仍然是鼻泪管阻塞 (NLDO) 的金标准疗法，但它是侵入性的并且不能维持泪道的生理学。通过经小管微钻泪膜成形术 (MDP)，有一种微创的替代手术方法。本研究旨在介绍这种现代泪管手术技术，并评估其在大型研究人群中的长期成功率。方法对1010例获得性NLDO患者的病历进行回顾性分析。接受过经小管 MDP 的成年患者也包括在内。评估包括以下参数：年龄、性别、成功率、并发症发生率、梗阻等级和患者满意度。通过电话调查评估了有关患者满意度和成功率的长期结果。只有完全解决症状才被定义为成功。结果 576例经小管MDP术后793只眼可纳入研究。平均随访时间为 8.7±0.9 年。初始手术成功率为84.0%。在随访时，57.5% (n=229) 的症状仍然完全消退。患者对手术的平均满意度为 6.9±3.2（满分 10 分）。仅 2 例（0.25%）发生大出血。结论 这是第一项在如此长的随访期和如此庞大的研究人群中显示显微内镜泪管手术成功率的研究。