CN201085730Y - 一种人工泪道植入装置 - Google Patents

一种人工泪道植入装置 Download PDF

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Publication number
CN201085730Y
CN201085730Y CNU2007201001558U CN200720100155U CN201085730Y CN 201085730 Y CN201085730 Y CN 201085730Y CN U2007201001558 U CNU2007201001558 U CN U2007201001558U CN 200720100155 U CN200720100155 U CN 200720100155U CN 201085730 Y CN201085730 Y CN 201085730Y
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lacrimal passage
needle
needle body
utility
tube
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贺忠江
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Tianjin Shijikangtai Biomedical Engineering Co., Ltd.
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Tianjin Medical University General Hospital
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Abstract

本实用新型是一种人工泪道植入装置，包括尾部针柄，管状针体及其外套的生物膜管，其特征在于：所述管状针体的头部呈圆锥形，构成泪道植入钻切刀。本实用新型利用静脉留置针的部分结构，将斜面的针头制成圆锥形钻刀头，使其具有钻切功能，不仅容易进入泪道，还可以切除原泪道内纤维化的软组织阻塞物，边钻切边进入，直入鼻腔。与此同时，聚氨酯膜外套管被植入患者的原泪道内，形成人工泪道。而且对组织没有刺激，无过敏反应，不被降解和吸收，既可根据需要取出，又可长期保留。手术只需几分钟即可完成。

Description

一种人工泪道植入装置
技术领域
本实用新型属于医疗器械领域，特别是一种人工泪道植入装置。
背景技术
慢性鼻泪管阻塞是一种眼科多发病、常见病，如不及时治疗，可以导致泪囊炎，威胁眼球，甚至发生眼内炎而失明。传统的治疗方法有泪道冲洗、使用各种泪道探针扩张、经泪小点顺行或从鼻腔逆行置入各种支撑物，或用光导纤维的激光探通后置入充填物。一般认为，如果已经形成慢性泪囊炎，则往往需要进行经皮肤切口和凿开泪囊骨壁的鼻腔泪囊吻合手术，手术操作及术后护理复杂，患者痛苦，并发症多，成功率低。而现有技术中有一种适宜在体内留置的用来静脉输液的留置针，其由管状针头，针头外套有聚氨酯膜管以及与注射器连接的柄组成。这种留置针在使用时，管状针头携带着的外部的聚氨酯膜管一同扎入血管，然后拔出针头，将聚氨酯膜管留置在血管中用于输液，避免再次静脉穿刺。但是该留置针只有穿刺的功能，不能进行钻、切，故不能用于泪道的治疗。
实用新型内容
本实用新型的目的在于提供一种人工泪道植入装置，既可以钻切泪道阻塞物，又可以同时植入一种可以留置在人血管内的、无毒、无致敏原、组织相容性好的医用聚氨酯膜制成的人工泪道，既可以扩张泪道，又可以长期保留在泪道中。
本实用新型的技术方案是设计一种人工泪道植入装置，包括尾部针柄，管状针体和套装在针体外表面的生物膜管，其特征在于：所述管状针体的头部呈圆锥形，构成泪道植入钻切刀。
本实用新型利用静脉留置针的部分结构，将其针头制成圆锥形钻刀，使之具有钻切的功能，不仅容易进入泪道，还可以切除原泪道内纤维化的软组织阻塞物，边钻切边进入，直入鼻腔。与此同时，聚氨酯膜外套管便被植入患者的原泪道内，形成人工泪道。而且对组织没有刺激，无过敏反应，不被降解和吸收，既可根据需要取出，又可长期保留。手术只需几分钟即可完成。
附图说明
图1为人工泪道植入装置端部示意图。
具体实施方式
下面通过实施例对本发明进一步详细说明。
人工泪道植入装置由圆锥形钻切刀1、管状针体2及其外套聚氨酯膜管3人工泪道组成。将原医用静脉留置针的头部制成圆锥形钻切刀，钻切刀的头部呈头细尾粗的圆锥形，刃口内径为0.1mm到1.1mm，外径为1.0mm到3.0mm。圆锥头部长度为0.5mm到5mm。针体呈均匀的管状，针体的长度从10mm到80mm。原静脉留置针的聚氨酯膜外套管外形保持不变，也可以用其它人工合成的生物膜外套管。针的尾部与静脉留置针一样，镶嵌入一个硬质空心塑料柄内，柄的尾端呈外方内圆形，长度34mm，柄尾芯的圆形内径3.5mm，可插入一次性注射器的头。
例如：针的体部长75mm，内径0.4mm，壁厚为0.35mm，聚氨酯膜外套管长度48mm，圆锥头部长度为3mm。

Claims (5)

1.一种人工泪道植入装置，包括尾部针柄，管状针体和套装在针体外的生物膜管，其特征在于：所述管状针体的头部呈圆锥形，构成泪道植入钻切刀。
2.根据权利要求1所述的人工泪道植入装置，其特征在于：所述管状针体的内径从0.1mm到1.1mm，外径从1.0到3.0mm，针体的长度从10mm到80mm。
3.根据权利要求1或2所述的人工泪道植入装置，其特征在于：所述管状针体的圆锥形头部的长度从0.5mm到5mm。
4.根据权利要求1或2所述的人工泪道植入装置，其特征在于：管状针体外表套装的是聚氨酯膜管。
5.根据权利要求3所述的人工泪道植入装置，其特征在于：管状针体外侧套装的是聚氨酯膜管。
CNU2007201001558U 2007-10-26 2007-10-26 一种人工泪道植入装置 Expired - Fee Related CN201085730Y (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109009656A (zh) * 2018-09-07 2018-12-18 上海市同济医院 一套组装式泪道扩张支架

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109009656A (zh) * 2018-09-07 2018-12-18 上海市同济医院 一套组装式泪道扩张支架

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