CN2356656Y - 双叶式人工心脏瓣膜 - Google Patents
双叶式人工心脏瓣膜 Download PDFInfo
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Abstract
一种双叶式人工心脏瓣膜,主要由环形瓣座,瓣叶及缝合环组成,瓣座顶部有互距180度的两个鞍峰,两鞍峰的内壁上各有两个球坑状轴窝,瓣叶有左、右两片,各以两端瓣轴分别卡装入瓣座鞍峰内壁的左、右轴窝而构成转动关节,瓣叶的半圆体朝下,长方体朝上,在两瓣叶开启及闭合时,瓣座的开启限位档及闭合限位档分别与瓣叶平面接触;本实用新型瓣叶开关灵活,有效瓣口面积大,中心血流通畅,跨瓣压差小,抗血栓性强,使用寿命长。
Description
本实用新型涉及医疗器材,特别涉及植入人体内的医疗产品,具体的是一种双叶式人工心脏瓣膜。
我国是发展中国家,风湿性心脏病发病率较高,对有些心脏瓣膜病患者,需要植入人工心脏瓣膜,人工心脏瓣膜自六十年代研制使用,至今已有三十多年历史。人工心脏瓣膜一般由环形瓣座、瓣叶(阀瓣)及辅助元件缝合环组成,在已有技术中,瓣叶为单叶(只有一片),工作时瓣叶随心脏跳动而不断开启、关闭,为了防止瓣叶开启量过大不能闭合,设计时限定瓣叶开启时相对瓣座的夹角不超过70度,这样就使瓣座通道面积受阻变小,中心血流不畅,血流易形成紊流,容易形成血栓。近年来有人提出过双片瓣叶的设计,但因其瓣座为等宽的圆环,双瓣叶开启量仍然受限,通道面积改善不大,有的采用扇形“8”字形的轴窝,不仅加工难度大,工艺性不好,也容易形成血栓,现有技术有进一步改进、完善的必要。
本实用新型的目的是克服上述不足,提供一种改进的双叶式人工心脏瓣膜,瓣叶开关灵合,有效瓣口面积大,中心血流通畅,跨瓣压差小,抗血栓性强,使用寿命长。
本实用新型的目的是这样实现的:
一种双叶式人工心脏瓣膜,主要由环形瓣座,瓣叶及辅助元件缝合环组成,缝合环装在环形瓣座外圆的凹入环槽中,其特征在于:
环形瓣座呈薄壁空心圆环形,该圆环底部平齐,顶部有互距180度的两个弧状凸出的鞍峰,两鞍峰之间为两个对称的马鞍状凹弧,在两鞍峰的内壁上各有两个球面轴窝,各轴窝与过鞍峰中心的直径线等距且与瓣座底部等高,每个鞍峰内壁的两个轴窝之间的入流侧各有一凹陷的小平面,在该小平面外侧及两轴窝上侧各有一弧形凸台状的开启限位档;下侧各有一凸台状的闭合限位档;
瓣叶有左、右两片,各呈薄板形,其正面由下部半圆体及上部长方体组成,在该半圆体与长方体的分界线的两端各有一圆弧凸耳形状的瓣轴,所述下部半圆体的底边及上部长方体的顶边有同向的斜度,所述左、右两片瓣叶的形状相同而所述底、顶边斜度方向相反;
其组装配合关系是:所述左、右瓣叶各以两端瓣轴分别卡装入瓣座鞍峰内壁的左、右轴窝而构成转动关节,瓣叶的半圆体朝下,长方体朝上,在两瓣叶闭合时,所述瓣座的闭合限位档与瓣叶平面接触止动,此时所述半圆体斜边恰与瓣座内环面成密封吻合,同时所述长方体斜边相互成密封吻合;在两瓣叶完全开启时,所述瓣座的开启限位档与瓣叶平面接触止动。
本实用新型的目的还可以通过以下措施实现:
所述瓣叶开放时限位于85°。
所述环形瓣座的两鞍峰内侧各有一对称的平台,所述安装瓣轴的轴窝、轴窝间的内陷小平面、位于小平面外侧及两轴窝上侧的开启限位档均设置于该平台上,与其相配的瓣叶的半圆体有相应该平台的缩边。
所述环形瓣座、瓣叶均用热解碳材料制成。
本实用新型有以下积极有益的效果:
本实用新型的设计结构简单合理,无噪音,低瓣架,瓣叶开闭灵活,中心血流、有效瓣口面积大,跨瓣压关差小,抗血栓性强,产品寿命长,且加工工艺性好,成本较低。
本实用新型用于替换由于各种原因引起的瓣膜疾病。
本实用新型的瓣座、瓣叶均用热解碳制成,且瓣叶含有约10%的钨,因而在平行或垂直于瓣口平面的X线透视下均可满意地观察瓣叶的工作情况。
现以较佳实施例结合附图进行说明:
图1是本实用新型一实施例的结构外形示意图;
图2是图1的A-A剖视图,图示开启位置;
图3同图2,示闭合位置;
图4是图1中瓣座的结构示意图;
图5是图4的俯视图;
图6是图1中瓣叶片的结构示意图;
图7是图6的侧视图;
图8是本实用新型又一实施例的俯视图;
图9是图8中瓣座的结构示意图;
图10是图9的俯视图。
附图编号:
1.环形瓣座 101.鞍峰 102.轴窝
103.凹陷小平面 104.开启限位档 105.闭合限位档
106.装缝合环的环槽 107.鞍峰内侧平台
2.瓣叶 2A.左瓣叶 2B.右瓣叶
201.半圆体 202.半圆体斜边 203.长方体
204.长方体斜边 205.瓣轴
3.缝合环
请参照图1图8,本实用新型的双叶式人工心脏瓣膜,主要由环形瓣座1,瓣叶2及辅助元件缝合环3组成,缝合环3装在环形瓣座1外圆的凹入环槽中106;
请参照图4图5,环形瓣座1呈薄壁空心圆环形,该圆环底部平齐,顶部有互距180度的两个弧状凸出的鞍峰101,两鞍峰101之间为两个对称的马鞍状凹弧,在两鞍峰的内壁上各有两个球坑状轴窝102,各轴窝102与过鞍峰中心的直径线等距且与瓣座底部等高,每个鞍峰内壁的两个轴窝102之间的入流侧各有一凹陷的小平面103,在该小平面外侧及两轴窝上侧各有一弧形凸台状的开启限位档104;下侧各有一凸台状的闭合限位档105;
请参照图6图7,瓣叶2有左、右两片2A、2B,各呈薄板形,其正面由下部半圆体201及上部长方体203组成,在该半圆体与长方体的分界线的两端各有一圆弧凸耳形状的瓣轴205,所述下部半圆体201的底边202及上部长方体203的顶边204有同向的斜度,所述左、右两片瓣叶2A、2B的形状相同而所述底、顶边202及204的斜度方向相反;
请参照图2图3,其组装配合关系是:所述左、右瓣叶2A、2B各以两端瓣轴205分别卡装入瓣座鞍峰内壁的左、右轴窝102而构成转动关节,瓣叶的半圆体201朝下,长方体203朝上,在两瓣叶闭合时,所述瓣座的闭合限位档105与瓣叶平面接触止动,所述半圆体斜边202恰与瓣座内环面成密封吻合,同时所述长方体斜边204相互成密封吻合;在两瓣叶完全开启时,所述瓣座的开启限位档104与瓣叶平面接触止动而使瓣叶开放时限位于85°(以瓣环为平面),同时更增加了血流对转动关节的冲洗。两鞍峰凸向瓣口血液流入方向,使瓣叶轴区域在瓣叶开启与关闭的周期均可受到血流的冲洗,从而降低该部位的血栓形成。瓣叶位于瓣环口内且不与瓣环重叠,故返流量少。
在图8图9图10所示实施例中,所述环形瓣座的两鞍峰内101、102侧各有一对称的平台107,所述安装瓣轴的轴窝102、轴窝间的内陷小平面103、位于小平面外侧及两轴窝上侧的开启限位档104均设置于该平台107上,与其相配的瓣叶的半圆体201有相应该平台的缩边(附图未示)。
在较佳实施例中,所述环形瓣座、瓣叶均用热解碳材料制成。热解碳被认为是一种较理想的人造瓣膜材料,它具有很好的血液和组织相容性,且化学成分稳定,强度高,表面光滑耐磨,自润滑,疲劳强度与断裂强度相等。
本实用新型的热解碳材质的瓣座、瓣叶,且瓣叶含有约10%的钨,在平行或垂直于瓣口平面的X线透视下均可满意地观察瓣叶的工作情况。
Claims (4)
1.一种双叶式人工心脏瓣膜,主要由环形瓣座,瓣叶及辅助元件缝合环组成,缝合环装在环形瓣座外圆的凹入环槽中,其特征在于:
环形瓣座呈薄壁空心圆环形,该圆环底部平齐,顶部有互距180度的两个弧状凸出的鞍峰,两鞍峰之间为两个对称的马鞍状凹弧,在两鞍峰的内壁上各有两个球面轴窝,各轴窝与过鞍峰中心的直径线等距且与瓣座底部等高,每个鞍峰内壁的两个轴窝之间的入流侧各有一凹陷的小平面,在该小平面外侧及两轴窝上侧各有一弧形凸台状的开启限位档;下侧各有一凸台状的闭合限位档;
瓣叶有左、右两片,各呈薄板形,其正面由下部半圆体及上部长方体组成,在该半圆体与长方体的分界线的两端各有一圆弧凸耳形状的瓣轴,所述下部半圆体的底边及上部长方体的顶边有同向的斜度,所述左、右两片瓣叶的形状相同而所述底、顶边斜度方向相反;
其组装配合关系是:所述左、右瓣叶各以两端瓣轴分别卡装入瓣座鞍峰内壁的左、右轴窝而构成转动关节,瓣叶的半圆体朝下,长方体朝上,在两瓣叶闭合时,所述瓣座的闭合限位档与瓣叶平面接触止动,此时所述半圆体斜边恰与瓣座内环面成密封吻合,同时所述长方体斜边相互成密封吻合;在两瓣叶完全开启时,所述瓣座的开启限位档与瓣叶平面接触止动。
2.如权利要求1所述的双叶式人工心脏瓣膜,其特征在于:所述瓣叶开放时限位于85°。
3.如权利要求1所述的双叶式人工心脏瓣膜,其特征在于:所述环形瓣座的两鞍峰内侧各有一对称的平台,所述安装瓣轴的轴窝、轴窝间的内陷小平面、位于小平面外侧及两轴窝上侧的开启限位档均设置于该平台上,与其相配的瓣叶的半圆体有相应该平台的缩边。
4.如权利要求1所述的双叶式人工心脏瓣膜,其特征在于:所述环形瓣座、瓣叶均用热解碳材料制成。
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US10849752B2 (en) | 2011-12-21 | 2020-12-01 | Edwards Lifesciences Corporation | Methods for anchoring a device at a native heart valve annulus |
US9078747B2 (en) | 2011-12-21 | 2015-07-14 | Edwards Lifesciences Corporation | Anchoring device for replacing or repairing a heart valve |
US11452602B2 (en) | 2011-12-21 | 2022-09-27 | Edwards Lifesciences Corporation | Anchoring device for replacing or repairing a native heart valve annulus |
US10238489B2 (en) | 2011-12-21 | 2019-03-26 | Edwards Lifesciences Corporation | Anchoring device and method for replacing or repairing a heart valve |
CN103099687A (zh) * | 2013-03-05 | 2013-05-15 | 广西医科大学第一附属医院 | 一种双叶不等大二尖瓣机械瓣 |
CN103099687B (zh) * | 2013-03-05 | 2015-06-03 | 广西医科大学第一附属医院 | 一种双叶不等大二尖瓣机械瓣 |
CN103110464A (zh) * | 2013-03-05 | 2013-05-22 | 广西医科大学第一附属医院 | 一种双叶不等大三尖瓣机械瓣 |
CN103099688A (zh) * | 2013-03-05 | 2013-05-15 | 广西医科大学第一附属医院 | 一种双叶不等大主动脉瓣机械瓣 |
CN103598931A (zh) * | 2013-08-29 | 2014-02-26 | 北京思达医用装置有限公司 | 一种宽入口大流量人工心脏瓣膜 |
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