CN101243996B - 晶状体传送系统 - Google Patents

晶状体传送系统 Download PDF

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CN101243996B
CN101243996B CN2008100056497A CN200810005649A CN101243996B CN 101243996 B CN101243996 B CN 101243996B CN 2008100056497 A CN2008100056497 A CN 2008100056497A CN 200810005649 A CN200810005649 A CN 200810005649A CN 101243996 B CN101243996 B CN 101243996B
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D·A·唐纳
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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Abstract

晶状体输送系统，其具有带有滑块加强部件的活塞杆。所述滑块跨在所述活塞杆上且与其在一起并有助于加强活塞杆以防止在使用期间弯曲或变形。

Description

晶状体传送系统
技术领域
本发明涉及人工晶状体(IOLs)并且更具体地涉及用于将IOLs插入到眼内的装置。
背景技术
人眼最简单的基本功能是通过称为角膜的清晰外部传送和折射光，并且进一步通过晶状体将像汇聚到眼底的视网膜上而提供视觉。汇聚的像的质量取决于很多因素，包括眼睛的大小、形状和长度，以及角膜和晶状体的形状和透明度。
当外伤、年龄或疾病使得晶状体的透明度变差时，因为传送到视网膜上的光减少所以视力下降。眼睛晶状体的这种病症就是医学上公知的白内障。对于该症状的治疗是将晶状体手术摘除并植入人工的晶状体或者IOL。
尽管早期IOLs是由硬质塑料制成，例如聚甲基丙烯酸甲酯(PMMA)，然而由硅树脂、软的丙烯酸树脂和水凝胶制成的软的、可折叠的IOLs因为可以将这些软晶状体折叠或者卷绕并且之后通过较小的切口将其插入所以已经变得越来越受欢迎。有几种卷绕或折叠晶状体的方法供使用。一种受欢迎的方法是将晶状体折叠并提供相对小直径腔的注射盒，晶状体可以从所述腔中通常由软的尖头活塞推入到眼内。最常用的注射盒的设计之一公开在美国专利No.4,681,102(Bartell)，并包括一分开的、纵向绞接的盒。另一最近介绍的一次性晶状体传送系统公开在USPN 7,156,854 B2(Brown等)。其它的盒设计在美国专利Nos.5,494,484和5,499,987(Feingold)和5,616,148和5,620,450(Eagles等)中。为了消除美国专利No.4,681,102权利要求中的问题，已经研究了几种固体盒，如参见美国专利No.5,275,604(Rheinish等)和5,653,715(Reich等)。
将晶状体从盒中排出而不损坏的性能取决于晶状体的设计和材料。硅树脂晶状体，由相对坚固和耐用的材料制成，能够经受更强的压缩。水含量高的水凝胶材料，更易碎，必须更轻柔地折叠。在自然状态下为粘弹性的软丙烯酸树脂对温度高度敏感，并且如果太冷可能易碎，太暖和的话可能无法工作。软丙烯酸树脂，当在合适温度下压缩时可以描述为“流动”而不是折叠。为此，软丙烯酸树脂最好慢慢地并以特别受控的方式压缩。
现有技术中适于和软丙烯酸树脂IOLs一起使用的晶状体输送手持件通常具有带非常长的活塞杆的活塞。当向下将晶状体沿较长长度的折叠盒推动时作用于这些手持件上的长久的冲击使得晶状体更缓慢地被折叠。当优选的切口尺寸已经变小时，盒嘴的直径也变小，迫使晶状体压缩得比过去更紧。将晶状体向下推出盒嘴所需的力相应地增加。该作用于活塞杆上的增加的力可能使得活塞杆变形或者弯曲。
因此，继续需要存在一种有助于防止晶状体手持件的活塞杆在使用期间弯曲或变形的装置。
发明内容
本发明通过提供一种具有滑块加强部件的活塞杆的晶状体传送系统来对现有技术进行改进。该滑块跨于活塞杆上并且活塞杆在一起并有助于加强活塞杆以防止其在使用期间弯曲或变形。
相应地本发明的一个目的在于提供一种适于折叠由软丙烯酸树脂材料制成的晶状体的晶状体传送系统。
本发明的另一个目的在于提供一种具有滑块的晶状体传送系统。
本发明的另一个目的在于提供晶状体传送系统，其具有有助于阻止活塞杆弯曲和变形的装置。
根据本发明的一个方面，提供一种人工晶状体传送系统，包括：a)盒，该盒包括狭槽；b)具有内壁的管状手持件；c)具有连接的远端延伸的活塞杆的活塞，所述活塞大小和形状设置为在管状手持件内往复移动；以及d)具有沟槽的滑块，所述沟槽的大小和形状设置为与活塞杆适配；其中所述滑块在所述盒的狭槽内的向前移动还引起活塞杆和活塞的移动；其中所述滑块被配置成向前推动直到所述滑块上的按钮到达所述狭槽的远端，所述狭槽的远端被配置成限制所述滑块的行进；其中所述活塞杆在所述滑块到达所述狭槽的远端后的进一步向前移动通过按压在所述活塞的端盖上来实现；其中在所述活塞杆的进一步移动期间，所述滑块用作加强件，以减少所述活塞杆的弯曲和变形。
根据本发明的另一方面，提供一种人工晶状体传送系统，包括：a)盒；b)具有内壁的管状手持件；c)具有连接的远端延伸的活塞杆的活塞，所述活塞大小和形状设置为在管状手持件内往复移动；以及d)具有沟槽的滑块，所述沟槽的大小和形状设置为与活塞杆适配，并且在盒内的狭槽中往返运动，所述狭槽具有限制滑块行进的远端；其中所述滑块在所述盒的狭槽内的向前移动还引起活塞杆和活塞的移动；其中当将滑块向前推动时，一系列分级的棘爪制动器向用户表明晶状体传送过程中的具体级数；其中所述滑块被配置成向前推动直到所述滑块上的按钮到达所述狭槽的远端，所述狭槽的远端被配置成限制所述滑块的行进；其中所述活塞杆在所述滑块到达所述狭槽的远端后的进一步向前移动通过按压在所述活塞的端盖上来实现；其中在所述活塞杆的进一步移动期间，所述滑块用作加强件，以减少所述活塞杆的弯曲和变形。
参考附图以及下面有关附图和权利要求的描述，本发明的其它目的、特征和优点将显而易见。
附图说明
图1是本发明的晶状体传送手持件或者系统的远端的局部放大透视图。
图2是安装于本发明的晶状体传送手持件或者系统上的滑块的局部放大透视图。
图3是本发明的滑块的局部放大透视图。
图4是本发明的安装于活塞杆上的滑块的放大侧视图。
图5是本发明的安装于活塞杆上的滑块的放大俯视图。
图6是本发明的晶状体传送系统的俯视图。
具体实施方式
如在图1和图6中最好观察到的，本发明的晶状体传送系统10通常包括盒12和手持件14。如在图1中最好观察到的，盒12通常具有管体16和注入嘴18。盒12由任何合适的热塑性塑料，如聚丙烯注塑为单件，且该热塑性塑料可以包括润滑增强剂，如美国专利No.5,716,364公开的润滑增强剂，该文献的全部内容在此引入以供参考。供选择地，盒12可以与手持件14整体形成。嘴18的横截面优选是圆的、卵形或者椭圆的并且具有大约1.0mm2至大约2.6mm2的横截面积。盒12包含用于接收欲折叠的晶状体22的腔20。以本领域公知的方式通过活塞杆24将晶状体22从腔20中推出并向下推向嘴18。
如在图3、4和5中最好观察到的，可以与本发明的晶状体传送系统一起使用的滑块26通常包括细长体28，其具有通道或槽30和作用按钮32。槽30的大小和形状设置为适于安装于活塞杆24上并适于在其上滑动。活塞杆24连接到活塞25上并且向远端延伸并包含棘爪34，其与包含在槽30中的销36啮合以便滑块26在盒12的狭槽27内的运动也导致活塞杆24和活塞25的运动，这将在下面描述。
使用时，将活塞25向近端(远离嘴18)拉动以便将活塞杆24和滑块26收回在暴露腔20的手持件14内，所述的腔20容许晶状体22如图1、2和6所见的放置于腔20内。通过向远端推动作用按钮32多个预测所期望的距离中的一段(图2中的刻度标记1、2和3)而使得滑块26前进。由于棘爪34和销36的互锁设置滑块26的运动还导致活塞杆24的运动。当将滑块26向远端推动时，可以设置一系列分级的棘爪制动器35以便向用户表明晶状体传送过程中的具体级数。可以连续地将滑块26向远端推动直到按钮32到达狭槽27的远端37，由此防止滑块26的任何进一步的运动，如图1中所示。活塞杆24的进一步运动通过按压活塞25的端盖39来进行，这导致活塞杆24克服棘爪34和销36的握持力以向远端将晶状体22从腔20中推出，经过盒12并从嘴18中推出。在活塞杆24的这种进一步运动期间，滑块26的本体28用作加强件，有助于减少活塞杆24的弯曲和变形。
尽管上边已经描述了本发明的某些实施例，但这些描述是以示例和说明的目的给出的。可以对上述公开的系统和方法进行变化、改变和变更而不脱离本发明的范围或精神。

Claims (8)

1.一种人工晶状体传送系统，包括：
a)盒，该盒包括狭槽；
b)具有内壁的管状手持件；
c)具有连接的远端延伸的活塞杆的活塞，所述活塞大小和形状设置为在管状手持件内往复移动；以及
d)具有沟槽的滑块，所述沟槽的大小和形状设置为与活塞杆适配；
其中所述滑块在所述盒的狭槽内的向前移动还引起活塞杆和活塞的移动；
其中所述滑块被配置成向前推动直到所述滑块上的按钮到达所述狭槽的远端，所述狭槽的远端被配置成限制所述滑块的行进；
其中所述活塞杆在所述滑块到达所述狭槽的远端后的进一步向前移动通过按压在所述活塞的端盖上来实现；
其中在所述活塞杆的进一步移动期间，所述滑块用作加强件，以减少所述活塞杆的弯曲和变形。
2.如权利要求1所述的晶状体传送系统，其中所述滑块与活塞杆摩擦啮合，以便滑块的移动引起活塞杆的移动。
3.如权利要求1所述的晶状体传送系统，其中狭槽的远端不限制活塞杆的行进。
4.一种人工晶状体传送系统，包括：
a)盒；
b)具有内壁的管状手持件；
c)具有连接的远端延伸的活塞杆的活塞，所述活塞大小和形状设置为在管状手持件内往复移动；以及
d)具有沟槽的滑块，所述沟槽的大小和形状设置为与活塞杆适配，并且在盒内的狭槽中往返运动，所述狭槽具有限制滑块行进的远端；
其中所述滑块在所述盒的狭槽内的向前移动还引起活塞杆和活塞的移动；
其中当将滑块向前推动时，一系列分级的棘爪制动器向用户表明晶状体传送过程中的具体级数；
其中所述滑块被配置成向前推动直到所述滑块上的按钮到达所述狭槽的远端，所述狭槽的远端被配置成限制所述滑块的行进；
其中所述活塞杆在所述滑块到达所述狭槽的远端后的进一步向前移动通过按压在所述活塞的端盖上来实现；
其中在所述活塞杆的进一步移动期间，所述滑块用作加强件，以减少所述活塞杆的弯曲和变形。
5.根据权利要求1所述的人工晶状体传送系统，其中所述活塞被配置成远离嘴向近端拉动，使得所述活塞杆和所述滑块收回在手持件内，以暴露腔，从而允许晶状体被放置在所述腔内。
6.根据权利要求1所述的人工晶状体传送系统，其中通过向远端推动滑块上的按钮多个预测所期望的距离中的一段来使所述滑块前进，所述多个预测所期望的距离以刻度标记表示。
7.根据权利要求4所述的人工晶状体传送系统，其中所述活塞被配置成远离嘴向近端拉动，使得所述活塞杆和所述滑块收回在手持件内，以暴露腔，从而允许晶状体被放置在所述腔内。
8.根据权利要求4所述的人工晶状体传送系统，其中所述滑块被配置成通过向远端推动滑块上的按钮多个预测所期望的距离中的一段来使所述滑块前进，所述多个预测所期望的距离以刻度标记表示。
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