目的 观测人泪道引流系统的Hasner瓣膜形态,提出形态学分型,为临床手术提供较为精确的参考依据。 方法 对45例成人Hasner瓣膜的存在率、形状、倾斜角、位置关系等进行解剖学测量,并进行K-mean1s聚类分析。 结果 本组标本中88%存在Hasner瓣膜,聚类为:A型:瓣膜的面积最大(平均皱襞切除术前后开口面积比S1/S2为0.533),覆盖鼻泪管开口的范围最广(平均膜定向范围角为166°);B型:瓣膜开口的倾角最平(平均鼻泪管开口水平线倾斜角θ为47.6°),瓣膜最厚(平均皱襞厚度T为0.745 mm);C型:瓣膜的面积最小(平均皱襞切除术前后开口面积比S1/S2为0.66),覆盖鼻泪管开口的范围最窄(平均膜定向范围角为149°),瓣膜最薄(平均皱襞厚度T为0.298 mm)。 结论 Hasner瓣膜可以分为A、B、C三型,本分型可为临床术式选择提供解剖依据:A型适用激光泪道成形术、鼻内镜Hasner瓣膜切除术等术式,B型适用泪囊鼻腔吻合术、泪小管切开术等旁路手术,C型适用泪道球囊扩张术等术式。
Abstract
Objective To observe the morphological parameters of the Hasner valve and to propose a morphological classification system that will serve as a reference for clinical surgical decision-making. Methods The presence rate, shape, inclination angle, coverage angle, thickness, opening area, and distance of the Hasner valve in 45 adult specimens were anatomically measured, followed by K-means cluster analysis. Results Among the 45 adult specimens, the Hasner valve was present in 88%. Clustering was identified three types: Type A: Largest valve area (mean pre-/post-resection opening area ratio [S1]/[S2] was 0.533) and widest coverage of the nasolacrimal duct orifice (mean membrane-directed coverage angle was 166°). Type B: Most horizontally oriented valve opening (mean nasolacrimal duct orifice inclination angle θ was 47.6°) and greatest valve thickness (mean plica thickness T was 0.745 mm). Type C: Smallest valve area (mean [S1]/[S2] was 0.66), narrowest coverage (mean membrane-directed coverage angle was 149°), and thinnest valve (mean plica thickness T was 0.298 mm). Conclusions The Hasner valve can be classified into Types A, B, and C. This new classification provides anatomical basis for selecting surgical approaches: Type A is suitable for laser lacrimal canaliculoplasty and endoscopic intranasal Hasner valve resection, type B is appropriate for bypass procedures such as dacryocystorhinostomy and canaliculotomy, type C is optimal for lacrimal balloon dacryoplasty.
关键词
泪道系统 /
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解剖学 /
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分类 /
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外科手术
Key words
Lacrimal apparatus /
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Anatomy /
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Classification /
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Surgical procedures
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基金
中山大学2024年大学生创新创业训练(20242453);中山大学中山医学院本科教学质量与教学改革工程类项目