CN115887082A - 医疗装置递送装置、系统和方法 - Google Patents
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Abstract
一种医疗装置递送系统包含联接元件,所述联接元件具有缓冲器,所述缓冲器具有被构造成接合医疗装置的近侧部分的远端部分,以及邻近细长管状构件的远端部分的近端部分。所述近端部分限定具有沿第一方向的长度的狭槽。所述联接元件进一步包含孔口,所述孔口延伸穿过所述缓冲器并且具有沿第二方向的第一较大横截面尺寸和沿第三方向的第二较小横截面尺寸。所述系统可以包含细长轴,所述细长轴具有远侧区域和在所述远侧区域的近侧的扁平区域,所述扁平区域具有小于所述第一横截面尺寸但大于所述第二横截面尺寸的最大横截面尺寸。所述扁平区域可以被接纳在所述狭槽内。
Description
技术领域
本技术涉及医疗装置递送装置、系统和方法。
背景技术
脉管系统的壁,具体地动脉壁可能发展被称为动脉瘤的病理性扩张区域,所述区域通常具有易于破裂的薄弱的壁。动脉瘤通常是由于疾病、损伤或先天性异常导致的血管壁弱化引起的。动脉瘤发生在身体的不同部位,并且最常见的是神经血管中的腹主动脉瘤和脑(例如,大脑)动脉瘤。当动脉瘤弱化的壁破裂时,尤其是如果是脑动脉瘤破裂的话,则会导致死亡。
动脉瘤通常通过将血管的薄弱部分从动脉循环中排除或至少部分隔离来治疗。例如,常规的动脉瘤治疗包含:(i)手术夹闭,其中将金属夹固定在动脉瘤底部周围;(ii)用小的挠性线圈(微线圈)包装动脉瘤;(iii)使用栓塞材料“填充”动脉瘤;(iv)使用可拆卸的球囊或线圈来堵塞供应动脉瘤的亲血管(parent vessel);以及(v)血管内支架术。
众所周知,血管内支架在医学领域中用于治疗血管狭窄或动脉瘤。支架是在血管或内腔内径向扩张或以其它方式扩张以支撑血管不塌陷的假体。用于递送这些血管内支架的方法也是众所周知的。
将经压缩支架引入到血管中并将其定位于狭窄或动脉瘤区域内的常规方法包含将引导导管的远侧部分经皮推进穿过患者的血管系统,直到远侧部分靠近狭窄或动脉瘤。第二内导管被推进穿过引导导管的远侧区域。然后将支架递送系统从引导导管的远侧区域推出到血管中,直到携带经压缩的支架的递送系统的远侧部分被定位在血管内的损伤点处。然后,经压缩的支架被释放并膨胀,使得其在损伤点处支撑血管。
发明内容
常规支架递送系统可以包含帮助在治疗部位处展开支架的核心构件。核心构件可以是多部件组件,其包含可以由临床医生抓握的呈线的形式的近侧部分、被构造成延伸穿过患者的脉管系统的、呈具有柔性增强切口的海波管形式的中间部分和从海波管的远端向远侧延伸的、呈线的形式的远侧部分。支架可以被定位在远侧线上,其中支架可以通过耦接到远侧线的一个或多个支架接合构件与核心构件接合。为了确保支架可靠且准确地在治疗部位处展开,远侧线必须正确地连接在核心构件内。远侧线通常通过钎焊或焊接到海波管而连接在核心构件内。在这些常规支架递送系统中,线和海波管之间的连接可能失效。在严重的情况下,远侧线可能与海波管断开,并使其在血管内部的同时与递送系统的其余部分脱离。这些和其它连接故障与海波管的内径内的焊剂的存在有关。
本技术涉及被构造为解决现有支架递送系统的上述局限性以及其他问题的医疗递送装置、系统和方法。例如,本技术的一些实施例涉及一种医疗装置递送系统,该医疗装置递送系统包括联接元件,该联接元件可以在核心构件内提供线和海波管之间的更强和更可靠的连接。联接元件可以焊接到海波管的端部,并且可以与线互锁。这种布置远离海波管的内部移动远侧线的焊接位置,并为远侧线提供干涉配合而不是焊接接头。作为这种布置的结果,核心构件内的海波管和远侧线不容易发生连接故障。
下文描述了本发明技术的另外的特征和优点,并且部分地将从描述中变得显而易见,或可以通过实践本发明技术来学习。本发明技术的优点将通过在书面描述和其权利要求以及附图中具体指出的结构来实现和获得。例如,根据以下描述的各个方面展示了本发明技术。这些作为实例提供,并且不限制本发明技术。
在一个实施例中,描述了一种医疗装置递送系统。该医疗装置递送系统可以包含:细长管状构件,该细长管状构件具有远端部分、近端部分和延伸穿过其中的内腔;以及联接元件,该联接元件耦接到细长管状构件的远端部分。联接元件可以包含缓冲器,该缓冲器具有被构造成接合医疗装置的近侧部分的远端部分;以及近侧部分,该近侧部分邻近细长管状构件的远端部分,其中近侧部分限定具有沿第一方向的长度的狭槽。联接元件还可以包含延伸穿过缓冲器的孔口,该孔口具有沿第二方向的第一横截面尺寸和沿不同于第二方向的第三方向的第二横截面尺寸,第一横截面尺寸大于第二横截面尺寸,其中第一方向大致正交于第二方向。医疗装置递送系统还可以包含细长轴,该细长轴具有远侧区域和在远侧区域的近侧的扁平区域,该扁平区域具有小于孔口的第一横截面尺寸但大于孔口的第二横截面尺寸的最大横截面尺寸,其中扁平区域至少部分被接纳在狭槽内。
在一个实施例中,描述了一种用于医疗装置递送系统的核心组件。该核心组件可以包含:细长管状构件,该细长管状构件具有远端部分、近端部分和延伸穿过其中的内腔;以及联接元件,该联接元件耦接到管状构件的远端部分。联接元件可以包含:缓冲器,该缓冲器具有邻接细长管状构件的远端部分的近侧面;近侧部分,该近侧部分在近侧面的近侧延伸并进入细长管状构件的内腔;以及孔口,该孔口延伸穿过缓冲器和近侧部分,该孔口具有沿第一径向轴线的第一横截面尺寸和沿第二径向轴线的第二横截面尺寸,第一横截面尺寸大于第二横截面尺寸。核心组件可以进一步包含耦接到联接元件的细长轴。细长轴可以包含:中间部分,该中间部分向缓冲器部分远侧延伸,并且被构造成在其上接纳医疗装置;近侧部分,该近侧部分延伸穿过联接元件孔口;以及接合特征,该接合特征沿近侧部分设置,该接合特征具有沿第一径向方向的第一径向最外尺寸和沿第二径向方向的第二径向最外尺寸,第一径向最外尺寸小于孔口的第一横截面尺寸和第二横截面尺寸,第二径向最外尺寸小于孔口的第一横截面尺寸但大于孔口的第二横截面尺寸。
在一个实施例中,描述了一种医疗装置递送系统。医疗装置递送系统可以包含具有近侧部分、远侧部分和延伸穿过其中的内腔的海波管,以及被定位在海波管的远侧部分处的联接元件。联接元件可以包含:缓冲器部分,该缓冲器部分具有邻接海波管的远端的面向近侧的表面;近侧部分,该近侧部分从远侧部分向近侧延伸,使得近侧部分被定位在海波管的内腔内;以及孔口,该孔口延伸穿过缓冲器部分和近侧部分,其中孔口具有沿第一径向方向的第一横截面尺寸和沿第二径向方向的第二横截面尺寸,第二横截面尺寸小于第一横截面尺寸。该医疗装置递送系统还可以包含细长构件,该细长构件具有位于近侧的附接部分,该位于近侧的附接部分包含延伸穿过孔口的保持区域和远离该细长构件的纵向轴线比保持区域更大程度地侧向延伸的加宽区域,其中加宽区域被构造成在第一定向上适配穿过孔口并在第二定向上与缓冲器和近侧部分碰撞。
在一个实施例中,描述了一种医疗装置递送系统。该医疗装置递送系统可以包含:细长管状构件,该细长管状构件具有远端部分、近端部分和延伸穿过其中的内腔;以及联接元件,该联接元件耦接到细长管状构件的远端部分。该联接元件可包含:缓冲器,该缓冲器具有被构造成接合医疗装置的近侧部分的远端部分;以及近侧部分,该近侧部分邻近细长管状构件的远端部分;鼻部,该鼻部具有在近端部分和远端部分之间延伸的主体,鼻部的近端部分邻近缓冲器的远端部分;以及孔口,该孔口延伸穿过缓冲器,该孔口具有沿第一方向的第一横截面尺寸和沿不同于第一方向的第二方向的第二横截面尺寸,第一横截面尺寸大于第二横截面尺寸。医疗装置递送系统还可以包含细长轴,该细长轴具有远侧区域和在远侧区域的近侧的扁平区域,该扁平区域具有小于第一横截面尺寸但大于第二横截面尺寸的最大横截面尺寸。
在一个实施例中,描述了一种组装医疗装置递送系统的方法。该方法可以包含将缓冲器耦接到细长管状构件的远端部分。缓冲器可以包含:主体,该主体具有邻接细长管状构件远端部分的近侧面和被构造成邻接医疗装置的近侧部分的远侧面;近侧部分,该近侧部分在近侧面的近侧延伸并进入细长管状构件的内腔,该近侧部分具有长度沿第一径向轴线的狭槽;以及孔口,该孔口延伸穿过主体和近侧部分,该孔口具有沿第二径向轴线的第一横截面尺寸和沿第三径向轴线的第二横截面尺寸,第一横截面尺寸大于第二横截面尺寸。该方法还可以包含利用该孔口来定向细长轴。细长轴可以具有沿细长轴的近侧部分设置的接合特征,该接合特征具有沿第一径向方向的第一径向最外尺寸和沿第二径向方向的第二径向最外尺寸。利用孔口来定向细长轴可以包含将第二径向方向与第二径向轴线对准。该方法还可以包含通过第一孔口向远侧移动细长轴的接合特征;将第二径向方向与第一径向轴线对准;以及向近侧移动细长轴的接合特征,直到接合特征被接纳在缓冲器的近侧部分的狭槽内。
附图说明
参考以下附图,可以更好地理解本公开的许多方面。附图中的部件不一定是按比例的。而是将重点放在清楚地展示本公开的原理。
图1A是根据本技术的一个或多个实施例的医疗装置递送系统的示意性图示。
图1B是血管内的图1A的医疗装置递送系统的局部示意图。
图2A是根据本技术的一个或多个实施例的缓冲器的示意性图示。
图2B是图2A的缓冲器的端视图。
图3A是根据本技术的一个或多个实施例的细长轴的示意性图示。
图3B是图3A的细长轴的端视图。
图4A是根据本技术的一个或多个实施例的鼻部的示意性图示。
图4B是图4A的鼻部的端视图。
图5A是根据本技术的一个或多个实施例的插入到缓冲器中的细长轴的示意性图示。
图5A1是沿来自图5A的线5A1的截面图。
图5B是根据本技术的一个或多个实施例的插入到缓冲器中的细长轴的示意性图示。
图5C是根据本技术的一个或多个实施例被重新定向的细长轴的示意性图示。
图5D是根据本技术的一个或多个实施例的被接纳在狭槽内的加宽区域的示意性图示。
图5D1是沿来自图5D的线5D1的截面图。
图5E是根据本技术的一个或多个实施例的被定位在细长轴上的鼻部的示意性图示。
具体实施方式
本技术涉及被构造为解决现有支架递送系统的上述局限性以及其他问题的医疗递送装置、系统和方法。该技术的一个或多个实施例的细节参考图1至图5E描述如下。如本文所使用的,术语“远侧”和“近侧”定义相对于临床医生或临床医生的控制装置(例如,递送导管的手柄)的位置或方向。例如,术语“远侧”和“向远侧”是指沿装置长度远离临床医生或临床医生的控制装置或在远离临床医生或临床医生的控制装置的方向上的位置。在相关的实施例中,术语“近侧”和“向近侧”是指沿装置的长度靠近临床医生或临床医生的控制装置或位于朝向临床医生或临床医生的控制装置的方向上的位置。
图1A是根据本技术的一个或多个实施例构造的医疗装置递送系统100(“系统100”)的示意性图示。图1B是血管内的图1A的医疗装置递送系统的局部示意图。这个系统100可以用于将医疗装置(诸如但不限于支架)递送和/或展开到中空解剖结构(诸如血管)中。支架可以包括编织支架或其他形式的支架,诸如织构支架、针织支架、激光切割支架、卷起支架等。支架可以可选地被构造成充当用于治疗动脉瘤(诸如在血管(包含大脑中或头盖骨内的动脉、或者在身体中的其它位置的动脉(诸如外周动脉))中发现的那些动脉瘤)的“偏流器”装置。支架可选地与由美国加利福尼亚州欧文市的Medtronic Neurovascular公司销售的PIPELINETM栓塞装置的型号或大小中的任何一个相似。如本文所述,支架替代性地包括任何合适的管状医疗装置和/或其他特征。在一些实施例中,支架可以是于2018年2月8日提交的题为“血管可扩张装置”的美国申请号15/892,268中描述的支架中的任何一个,该申请的全部内容通过引用结合于此并构成本说明书的一部分。
参照图1A和图1B,系统100可以包括被构造成大致纵向延伸穿过细长导管101的内腔111的核心构件或核心组件102。核心构件102可以具有可以可选地包含尖端线圈108的近侧区域104和远侧区域106。核心构件102还可以包括位于近侧区域104和远侧区域106之间的中间部分110。中间部分110是当核心构件102处于如图1A所示的展开前构型时,支架105在其上或上方延伸的核心构件102的部分。
递送系统100可以包含任何数量的导管101和/或与其一起使用。例如,导管可以可选地包括可从美国加利福尼亚州欧文市的Medtronic Neurovascular公司获得的各种长度的MARKSMANTM导管中的任何一个。导管可以可选地包括微导管,该微导管在远侧区域附近具有约0.030英寸或更小的内径和/或3弗伦奇或更小的外径。代替这些规范或除了这些规范之外,导管可以包括微导管,该微导管被配构造为进入颈内动脉或神经脉管系统内的颈内动脉远侧的另一位置。
核心构件102通常可以包括具有足够柔性和柱强度的任何构件,以移动支架105或其他医疗装置通过周围的导管101。因此,核心构件102可以包括线、管(例如海波管)、编织物、线圈或其他合适的(多个)构件,或者(多个)线、(多个)管、(多个)编织物、(多个)线圈等的组合。图1A中描绘的核心构件102的实施例具有多构件构造,包括线112,其中管114沿线的长度的至少一部分围绕线112。例如,线112的远侧部分可以被定位在管114内,使得管114围绕线112的远侧部分。诸如PTFE(聚四氟乙烯或TEFLONTM)或其他润滑聚合物的润滑材料外层可以覆盖管114和/或线112中的一些或全部。线112可以沿其长度的部分或全部逐渐变细或在直径方面改变。线112可以包含一个或多个荧光安全标记(未示出),并且(多个)这种标记可以位于线112的未被润滑材料的外层覆盖的部分上(例如,外层的近侧)。由(多个)标记物标记的和/或任何外层的近侧的线112的这个部分可以包括裸露的金属外表面。
核心构件102可以包括可以将支架105与核心构件102互连的支架耦接组件120和/或远侧界面组件122。在一些实施例中,联接元件200将支架耦接组件120和/或远侧界面组件122与核心构件102耦接。如将更详细描述的,联接元件200可以与管114耦接。例如,联接元件200可以焊接到管114的远端部分。联接元件200可以与延伸穿过核心构件102的中间部分110和远侧区域106的细长轴250互锁。支架耦接组件120可以与中间部分110内的细长轴250耦接,使得支架耦接组件120接合支架105。远侧接口组件122可以与支架105的远侧的细长轴250耦接,使得远侧接口组件122与支架105的远侧部分接合。
支架耦接组件120可以包括一个或多个接合构件123a、123b(统称为“接合构件123”),该一个或多个接合构件可以位于支架105下方并与该支架机械接合或互锁。以这样的方式,支架耦接组件120与周围导管101的覆盖内表面配合以接合支架105,使得支架耦接组件120能够沿导管101并在该导管内移动支架105,例如在使用者相对于导管101向远侧推动核心构件102和/或向近侧拉动核心构件102时,从而导致支架105在细长轴内腔111内相应地向远侧和/或近侧移动。
支架耦接组件120可以包含一个或多个限制件121,该一个或多个限制件固定到核心构件102(例如,在所描绘的实施例中固定到其细长轴250),从而以纵向/滑动方式或径向/旋转方式相对于核心构件102不可移动。支架耦接组件120还可以包含由一个或多个间隔件125分离的多个接合构件123。例如,支架耦接组件120可以包含由间隔件125分离的第一接合构件123a和第二接合构件123b。
接合构件123和/或间隔件125可以耦接到(例如,安装在)核心构件102上,使得支架耦接组件120可以围绕核心构件102(例如,中间部分110)的纵向轴线旋转,和/或沿核心构件102纵向移动或滑动。例如,接合构件123和间隔件125可以耦接到细长轴250,使得接合构件123和间隔件125可以围绕细长轴250旋转。在一些实施例中,支架105可以经由支架耦接组件120在覆盖导管101内向远侧或近侧移动。在一些实施例中,在支架105从导管101的远侧开口部分展开之后,支架105可以经由支架耦接组件120重新装入。
继续参考图1A,远侧接口组件122可以包括远侧覆盖件126。在一些示例中,远侧覆盖件126可以采取例如远侧接合构件、远侧装置覆盖件或远侧支架覆盖件的形式。远侧覆盖件126可以被构造成减少支架105(例如,其远侧部分)和周围导管101的内表面之间的摩擦。例如,远侧覆盖件126可以被构造为光滑的柔性结构,其具有可以在支架105和/或核心构件202的中间部分110的至少一部分上延伸的自由第一端或区段126a,以及可(直接或间接)耦接到核心构件102的固定第二端或区段126b。在一些实施例中,远侧覆盖件126可旋转地耦接到核心构件102。
远侧覆盖件126可以具有第一(例如,递送)位置、构型或定向,在该第一(例如,递送)位置、构型或定向,第一远侧覆盖件126可以从第二区段126b或其到核心构件102的(直接或间接)附接部向近侧延伸,并且至少部分地围绕或覆盖支架105的远侧部分。远侧覆盖件226可以从第一定向移动到第二(例如,重新装入)位置、构型或定向(未示出),在该第二(例如,重新装入)位置、构型或定向,远侧覆盖件可以被翻转,使得远侧覆盖件的第一端126a相对于远侧覆盖件126的第二端126b远侧定位,从而能够将核心构件102重新装入(或者带有由其携带的支架105、或者不带支架105)。
在一些实施例中,远侧接口组件可以包含近侧和远侧限制件127、128。近侧和远侧限制件127、128中的一个或两个可以具有小于远侧覆盖件126的(例如,展开前)外径或其他径向最外尺寸的外径或其他径向最外尺寸,使得限制件127、128中的一个或两个在核心构件102的操作期间将不倾向于抵靠或接触导管101的内表面。替代性地,可以优选地使限制件127和128的外径大于预展开远侧覆盖件126的最大径向尺寸,和/或使近侧限制件127的外径大于远侧限制件128的外径。这种构型允许远侧覆盖件126和限制件127、128在支架展开后容易且平滑地收回到细长轴中。
远侧覆盖件126、近侧限制件127和远侧限制件128可以耦接到(例如,安装在)核心构件102上,因此远端界面组件可以围绕核心构件102的纵向轴线旋转。在采用可旋转支架耦接组件120和可旋转远侧覆盖件126两者的核心构件102的实施例中,由于支架耦接组件120和远侧覆盖件126的可旋转连接,支架105可相对于核心构件102围绕其纵向轴线旋转。在这样的实施例中,支架105、支架耦接组件120和远侧覆盖件126可以以这种方式围绕核心构件102一起旋转。当支架105可以围绕核心构件102旋转时,核心构件102可以更容易地前进通过弯曲的血管,因为血管扭曲支架105和/或核心构件102的趋势被支架105、支架耦接组件120和远侧覆盖件126围绕核心构件102的旋转抵消。此外,所需的推力或递送力减小,因为使用者的输入推力没有被转移成支架105和/或核心构件102的扭转。扭曲的支架105和/或核心元件102在出现支架105的扭曲或展开时突然解开或“抖动”的趋势,以及扭曲的支架在展开时抵抗扩张的趋势也被降低或消除。进一步,在核心构件102的一些这样的实施例中,使用者可以通过尖端线圈108“操控”核心构件102,特别是在线圈108在其未受应力的构型中以一定角度弯曲的情况下。通过旋转核心构件102的远侧区域106,这种线圈尖端可以相对于支架105、联接组件120和/或远侧覆盖件126围绕系统100的纵向轴线旋转。因此,使用者可以将线圈尖端108指向核心构件102的期望行进方向,并且在核心构件前进时,尖端将在所选择的方向上引导核心构件。
参考图1A和图1B,联接元件200可以包含缓冲器部分或缓冲器210、缓冲器210近侧的近侧部分212和缓冲器210的远侧的鼻部部分或鼻部230。细长轴250可以延伸穿过联接元件200的内腔,并向远侧延伸至鼻部部分230。如下面更详细讨论的那样,细长轴250可以与联接元件200的近侧部分212机械互锁,从而将细长轴250相对于联接元件200固定就位。如前所述,支架接合构件123、间隔件125和远侧限制件121可以在联接元件200远侧的位置处安装在细长轴250上。在一些实施例中,支架105可以设置在支架接合构件123上,同时支架105的近端邻接缓冲器210的远侧面。在这种构型中,鼻部部分230可以部分延伸到支架105的内腔中。
缓冲器210可以具有略小于导管101的内径的外径,从而在缓冲器210的外边缘和导管101的内壁之间留有径向间隙。鼻部230可以具有稍小于经压缩的支架105的内径的直径,从而允许鼻部230定位在由支架105形成的内腔内。如前所述,联接元件200可以与管114耦接。联接元件200可以耦接到管114的远端部分,使得缓冲器210轴向设置在管114和支架105之间。例如,在架105设置在缓冲器210的远侧面222的远侧时,管114的远端部分可以被焊接、锡焊和/或以其他方式联接到缓冲器210的近侧面220。在一些实施例中,当联接元件200耦接到管114时,缓冲器210的近侧部分212可以设置在由管114形成的内腔中。在各种实施方式中,联接元件200被构造为邻接支架105的近端或近侧边缘。例如,缓冲器210可以被定位为邻近支架105,使得缓冲器210邻接支架105的近端。
联接元件200可以与细长轴250耦接。例如,细长轴250可以与联接元件200的近侧部分212互锁,并延伸穿过联接元件200。在一些实施例中,细长轴250可以与联接元件200的鼻部230耦接。例如,细长轴250可以被焊接、锡焊和/或以其他方式与鼻部230联接。缓冲器210远侧的细长轴250的一部分可以被构造成在其上接纳医疗装置,例如支架。例如,支架耦接组件120可以在缓冲器210的远侧的位置处耦接到细长轴250,其中支架耦接组件120被构造成在细长轴250的这个部分上接合支架105。
如将更详细描述的那样,细长轴250可以包含加宽区域254,该加宽区域与联接元件200的近侧部分212互锁。通过将细长轴250与缓冲器210互锁,联接元件200可以保持细长轴250并防止细长轴250相对于核心构件102向远侧移动。在一些实施例中,鼻部230可以以防止细长轴250相对于核心构件102向近侧移动的方式与细长轴250耦接。例如,鼻部230可以被焊接、钎焊和/或以其他方式与细长轴250联接,使得细长轴250不能相对于核心构件102向近侧移动。联接元件200的近侧部分212处的机械互锁和联接元件200的鼻部230处的焊接接头一起可以防止细长轴250相对于联接元件200和/或管114的任何轴向移动。附加地或替代性地,缓冲器210和鼻部230可以防止细长轴250相对于联接元件200和/或管114的任何旋转移动。因此,将细长轴250与联接元件200耦接可以使得细长轴250相对于联接元件200和/或管114不可移动,因为联接元件200可以将细长轴250轴向和旋转地保持在适当位置。
在一些实施例中,联接元件200可以用于通过导管101向远侧移动(例如,推动)支架105。例如,响应于施加到核心构件102的远侧推力,缓冲器210的远侧面222可以压靠支架105并在导管101内向远侧移动支架105。当联接元件200被构造成向远侧推动支架105时,联接元件200可以被构造成将指向远侧的轴向力(例如,推力)中的一些、大部分或全部传递到支架105,完全或部分代替接合构件123。在这种构型中,接合构件123可以被构造成在支架105沿导管101的长度向远侧递送的同时向支架105传递很小的推力或不传递推力。有利地,这可以减少或消除当接合构件123用于将力传递到支架105并在导管101内移动该支架时,接合构件123扭曲接合构件123所接合的支架105的孔的趋势。使用联接元件200以这样的方式移动支架105还可以减少或消除支架105相对于核心构件102的轴向移动,该轴向移动有时伴随着孔变形。在大多数情况下,相比于在支架的最终的最后展开之前在近侧或“拉动”方向上将支架105重新装入中涉及的相对较短的行程,在递送到治疗位置期间,支架105在导管101内的绝大部分行程是在远侧或“推动”方向上。因此,将联接元件200构造成将大部分或全部推力传递给支架105可以显著减少或基本上消除支架的这种变形和/或相对轴向移动。
图2A示出了根据本技术的一个或多个实施例的缓冲器210的示意图。图2B示出了来自图2A的缓冲器210的端视图。一起参考图2A和2B,缓冲器210可以包含设置在近侧部分212的远端处的大致圆柱形的主体214。尽管一些示例将近侧部分212描述为与缓冲器210不同是分离的,但是在一些实施例中,近侧部分212和缓冲器210可以一体形成和/或组合成同一部件。例如,缓冲器210可以限定近侧部分212,并且可以包含被构造成与细长轴250机械互锁的狭槽218(如下所述)。近侧部分212形成从缓冲器210的近侧面220向近侧延伸的圆柱形主体。在一些实施例中,近侧部分212的宽度小于管114的内径,从而允许近侧部分212被接纳在管114内。缓冲器210的主体214可以具有比近侧部分212更宽(例如,具有更大的径向最外尺寸)的大致圆柱形形状,并且可以具有比导管101的内径稍小的宽度,从而在主体214的外边缘和导管101的内壁之间留下径向间隙。附加地,缓冲器210可以限定近侧面220和远侧面222。可以穿过缓冲器210和近侧部分212形成孔口216。孔口216可以形成贯穿缓冲器210和近侧部分212的不规则形状的内腔。例如,如图2B所示,孔口216的一部分可以形成矩形或狭槽轮廓,而孔口216的第二部分可以形成圆形或椭圆形轮廓。孔口的这些分离的部分可以限定不同长度的一个或多个横截面尺寸。例如,狭槽部分可以限定具有长度224a的第一横截面尺寸,并且圆形部分可以限定具有长度224b的第二横截面尺寸。在各种实施例中,长度224a可以大于长度224b。附加地或替代性地,孔口216可以限定两个径向轴线或方向。例如,如图2B所示,孔口216限定了沿矩形轮廓的第一径向轴线A1和沿圆形轮廓的第二径向轴线A2。在一些实施例中,狭槽218可以形成在近侧部分212的近端处。狭槽218可以在近侧部分212内形成与孔口216相配合的通道。在各种实施例中,狭槽218可以具有相对于轴线A1成一定角度形成的长度。例如,狭槽218可以垂直于轴线A1。在一些实施例中,狭槽218可以具有平行于轴线A2的长度。
如前所述,缓冲器210和近侧部分212可以与细长轴250耦接。孔口216的大小可以被确定成使得细长轴250可以被接纳在孔口216内。如将更详细描述的那样,细长轴250的加宽区域254可以被定位在狭槽218内。将加宽区域254定位在狭槽218内将细长轴250与联接元件200互锁,并防止细长轴250相对于联接元件200向远侧移动和/或旋转。
图3A示出了根据本技术的一个或多个实施例的细长轴250的示意图。图3B示出了图3A的细长轴250的端视图。一起参考图3A和3B,细长轴250可以包含主体252和加宽区域254。主体252可以沿轴线L延伸并限定近侧部分250a和远侧部分250b。在近侧部分250a处或附近,加宽区域254可以形成在主体252中。
加宽区域254可以是主体252的形成圆柱形轮廓的平坦或“模压”区域,该圆柱形轮廓法向于由主体252形成的圆柱形轮廓。例如,如图3A和图3B所示,主体252形成具有沿轴线L的高度的圆柱形轮廓,而加宽区域254形成具有沿径向方向R2的高度的圆柱形轮廓,其中径向方向R2法向于轴线L。加宽区域254的这种轮廓导致加宽区域254具有大于主体252沿一个方向的横截面尺寸但是小于主体252沿分离的方向的横截面尺寸的横截面尺寸。例如,如图3B所示,加宽区域254的最大横截面尺寸大于主体252沿径向方向R1的最大横截面尺寸但是小于主体252沿径向方向R2的最大横截面尺寸。在一些实施例中,加宽区域254可以沿一个方向比主体252径向更宽但是沿另一个方向具有与主体252基本上相同的径向尺寸。在一些实施例中,加宽区域254可以包含在加宽区域254处从主体252的表面径向向外突出的一个或多个突起(例如,脊部、隆起、突起等)。
细长轴250的大小可以被确定为成使得细长轴250可以被接纳在孔口216内。例如,细长轴250的主体252可以具有小于孔口216的长度224b的直径,而加宽区域254可以具有小于孔口216的长度224a的直径。通过以这种方式确定大小,细长轴250的主体252和加宽区域254两者可以被接纳在缓冲器210的孔口216或近侧部分212内。在一些实施例中,当细长轴250处于特定定向时,细长轴250可以被接纳在孔口216内。例如,加宽区域254可以具有大于长度224b的直径,从而当径向方向R1与轴线A2对准时,防止加宽区域254移动穿过缓冲器210或近侧部分212,但是当径向方向R1与轴线A1对准时,允许加宽区域254移动穿过缓冲器210或近侧部分212。附加地或替代性地,加宽区域254可以被定位在狭槽218内。狭槽218的大小可以被确定为与加宽区域254形成摩擦配合。当加宽区域254被定位在狭槽218内时,防止细长轴250向远侧移动和/或旋转,直到加宽区域254从狭槽218移除。
细长轴250的加宽区域254可以通过卷曲或挤压细长轴250的一部分来形成。例如,压力机可以压入到细长轴250的一部分中,从而形成加宽区域254。加宽区域254可以沿细长轴250的长度形成在任何合适的位置处,包含在轴250的最近侧端或在与最近侧端间隔开的区域处。
在一些实施例中,加宽区域254可以采取接合特征的形式。接合特征可以限定沿径向方向R2的第一径向最外尺寸和沿第二径向方向R1的第二径向最外尺寸。在一些实施例中,第一径向最外尺寸小于第一横截面尺寸的长度224a和第二横截面尺寸的长度224b。在各种实施例中,第二径向最外尺寸小于第一横截面尺寸的长度224a但大于第二横截面尺寸的长度224b。当加宽区域254与第二横截面尺寸对准时(例如,当径向R1与轴线A1对准时),这种构型允许加宽区域254移动穿过孔口216。
在一些实施例中,细长轴250的加宽区域254可以采取附接部分的形式,并且细长轴250延伸穿过缓冲器210的部分可以采取保持区域的形式。细长轴250的附接部分可以以大于细长轴250的保持区域的程度远离细长轴250的轴线L侧向延伸。在一些实施例中,附接部分被构造成在第一定向上适配穿过孔口216,并在第二定向上与缓冲器210或近侧部分212碰撞。例如,当附接部分与孔口216的较大部分对准时,附接部分可以适配在孔口216内,但是当附接部分没有与孔口216的较大部分对准时,附接部分将与缓冲器210的远侧面222或近侧部分212的近侧面碰撞。
图4A示出了根据本技术的一个或多个实施例的鼻部230的等距视图,并且图4B示出了鼻部230的近侧面236的视图。一起参考图4A和图4B,鼻部230可以具有主体232,该主体具有延伸穿过主体232的孔口234。主体232可以形成具有在第一端处的近侧面236并且与第一端相对的第二端处的远侧面238的圆柱形轮廓。主体232的直径或宽度可以小于支架105的直径或宽度,从而允许鼻部230定位在支架105的内腔内,而不接触支架105。
如前所述,鼻部230可以被定位在缓冲器210的远侧。在一些实施例中,鼻部230的近侧面236可以接触缓冲器210的远侧面222。在各种实施例中,鼻部230可以耦接到缓冲器210。例如,鼻部230可以焊接、锡焊或以其他方式联接到缓冲器210。附加地或替代性地,鼻部230可以与细长轴250联接。细长轴250的至少一部分可以设置在鼻部230的孔口234内。当设置在孔口234内时,细长轴可以被焊接、锡焊或以其他方式与鼻部230联接。在一些实施例中,孔口216可以与孔口234对准。
通过将鼻部230与细长轴250耦接,可以限制或防止细长轴250的轴向移动。例如,可以防止细长轴250相对于核心构件102向近侧移动,因为鼻部230会与缓冲器210碰撞,从而阻止细长轴250向近侧移动。附加地或替代性地,鼻部230可以防止细长轴250相对于核心构件102旋转。例如,鼻部230与缓冲器210和细长轴250的耦接可以阻止细长轴250相对于核心构件102的任何旋转移动。在一些实施例中,将鼻部230与缓冲器210和细长轴250耦接可以防止细长轴250相对于核心构件102的任何轴向移动。例如,鼻部230、缓冲器210和细长轴250之间的固定连接可以使得细长轴250相对于核心构件102不可移动。
图5A至图5E示出了根据本技术的一个或多个实施例的将细长轴250与联接元件200互锁的几个示意图。图5A示出了插入缓冲器210的孔口216中的细长轴250,以及图5A1示出了图5A的沿图5A内的5A1线的截面图。如图5A所示,细长轴250在缓冲器210的远侧面222处插入缓冲器210的孔口216中。在一些实施例中,细长轴250可以插入近侧部分212的近侧面中。当被插入到缓冲器210中时,加宽区域254被定向成使得细长轴250的径向R1与孔口216的轴线A1对齐。如图5A1示,这种定向允许加宽区域254插入到孔口216中,而缓冲器210不阻碍其移动。
图5B示出了细长轴250被接纳在缓冲器210的孔口216和近侧部分212中,同时加宽区域254被定位在近侧部分212的近侧。细长轴250可以向近侧推动穿过孔口216,直到加宽区域254被定位在近侧部分212的近侧。在这个位置,加宽区域254可以与缓冲器210间隔开,从而允许细长轴250自由地且相对于缓冲器210旋转。
图5C示出了在加宽区域254被定位在近侧部分212的近侧之后细长轴250被重新定向。在加宽区域254被推动穿过孔口216并且细长轴250自由旋转之后,细长轴250可以与狭槽218对准。如前所述,狭槽218可以相对于轴线A1以一定角度形成。因此,为了使加宽区域254与槽218对准,加宽区域被旋转使得径向R1与槽218的长度对准。将加宽区域254与狭槽218对准防止细长轴250轴向移动穿过联接元件200,因为加宽区域254将与近侧部分212碰撞并阻碍任何穿过孔口216的移动。
图5D示出了与近侧部分212互锁的细长轴250,并且图5D1示出了图5D的沿图5D内的5D1线的截面图。在细长轴250被重新定向成使得加宽区域254与狭槽218对准之后,细长轴250可以向远侧移动,使得加宽区域254被接纳在狭槽218内,如图5D和图5D1示。随着加宽区域254被接纳在狭槽218内,细长轴250被防止相对于近侧部分212进一步向远侧移动,因为细长轴250的加宽区域254在被定位在狭槽218内的同时不能移动通过孔口216。附加地或替代性地,当加宽区域254被接纳在狭槽218内时,防止细长轴250相对于联接元件200旋转,因为加宽区域254和狭槽218之间的配合防止细长轴250独立于缓冲器210的任何显著旋转移动。在一些实施例中,在细长轴250向近侧移出狭槽218之后,细长轴250可以随后被轴向和/或旋转地调节。
图5E示出了在细长轴250与缓冲器210互锁之后鼻部230与细长轴250耦接。鼻部230可以在细长轴250上滑动,直到鼻部230的近侧部分接触缓冲器210的远侧面222。一旦鼻部230接触缓冲器210,鼻部230可以通过焊接、锡焊或其他方式将鼻部230和细长轴250联接在一起而耦接到细长轴250上。通过将鼻部230与细长轴250耦接,防止细长轴250相对于联接元件200向近侧移动,因为鼻部230和缓冲器210之间的接触会阻碍细长轴250并防止细长轴250独立于联接元件200向近侧移动。在一些实施例中,鼻部230可以通过焊接、锡焊和/或以其他方式将鼻部230与缓冲器210联接而耦接到缓冲器210。通过将鼻部230耦接到缓冲器210和细长轴250,可以防止细长轴250独立于联接元件200旋转。
现在将描述在核心构件102内将细长轴250与联接元件200耦接的方法。首先,缓冲器210耦接到核心构件102。缓冲器210通过焊接、锡焊和/或以其他方式将缓冲器210连接到管114而耦接到核心构件102。例如,管114的远端部分可以焊接到缓冲器210的近侧面220和/或近侧部分212,从而将缓冲器210与管114耦接。在缓冲器210焊接到管114上之后,细长轴250通过缓冲器210的远侧面222插入缓冲器210的孔口216中。在一些实施例中,将细长轴250插入孔口216中可以包含将细长轴250的径向R1与孔口216的A1轴线对准。随着细长轴250定位在孔口216内,细长轴250然后向远侧移动通过孔口216,直到变宽区域254在近侧部分212的近端的近侧穿过孔口216并自由旋转。接下来,可以旋转细长轴250,使得加宽区域254与狭槽218对准。一旦加宽区域254与狭槽218对准,细长轴250向远侧移动,直到加宽区域254被接纳在狭槽218内,从而将细长轴与近侧部分212互锁。接下来,鼻部230在细长轴250上滑动并被定位为邻近缓冲器210,使得鼻部230的近侧面接触缓冲器210的远侧面222。随着鼻部230接触缓冲器210,鼻部230耦接到细长轴250和缓冲器210。例如,鼻部230可以焊接到细长轴250和缓冲器210上。将鼻部230与细长轴250和缓冲器210的耦接以及将加宽区域254定位在狭槽218内将细长轴250与联接元件200互锁。在一些实施例中,在加宽区域254被定位在狭槽218内之后,缓冲器210被焊接到管114。在各种实施例中,细长轴250最初移动通过联接元件的近侧部分212,而不是缓冲器210的远侧面222。
现在将描述操作系统100来移动支架105。支架105可以经由核心构件102和支架耦接组件120在导管101内向远侧或近侧移动。为了将支架105移出导管101,在导管101保持固定的同时向远侧移动核心构件102,在导管101向近侧撤回的同时核心构件102保持固定,或者在导管101同时向近侧撤回时,向远侧移动核心构件102。当核心构件102向远侧移动时,联接元件200抵靠支架105的近端或边缘,并使支架105向远侧前进,并最终推出导管101。在其中接合构件123用于将推力传递到支架105的实施例中,响应于向核心构件102施加的朝向远侧的力,接合构件123和支架105之间的机械接合或互锁导致支架105向远侧移动穿过导管101并移出该导管。相反,为了将支架105重新装入导管101或将该支架移动到该导管中,与将支架105移出导管101相比,核心构件102和导管101之间的相对移动被反转,使得限制件121的近侧区域抵靠间隔件125的远侧区域,并且从而导致间隔件125、释放构件124和接合构件123缩回到导管101的内腔111中。在接合构件123被定位在内腔111内的同时的接合构件123和支架105之间的机械接合相对于核心构件102保持支架105,使得支架105相对于导管101的近侧移动能够使支架105重新装入到导管101中。当支架105已经部分展开并且支架105的一部分保持设置在接合构件123中的至少一个(例如第一接合构件123a)和导管101的内表面之间时,这是有用的,因为通过相对于导管101向近侧移动核心构件102(和/或相对于核心构件102向远侧移动导管101),支架105可以撤回到导管101中。以这种方式重新装入仍然是可能的,直到接合构件123和/或导管101已经移动到其中第一接合构件123a超出导管101的远侧开口并且支架105从第一接合构件123a和导管101之间释放的点。
结论
尽管许多实施例是针对用于用于递送支架、管状植入物(诸如过滤器、分流器或支架移植物)和其他医疗装置的装置、系统和方法来描述的,但是除了本文所述的那些之外的其他应用和其他实施例也在本技术的范围内并且代替典型地所公开的支架可以用于本文所公开的系统的任何实施例中。此外,除了本文所描述的那些之外的其它实施方案在技术的范围内。此外,技术的若干其它实施方案可具有与本文所描述的不同的配置、部件或过程。因此,本领域普通技术人员将会相应地理解,该技术可以具有带有附加元件的其他实施例,或者该技术可以具有没有以上参照图1至图5E示出和描述的几个特征的其他实施例。
本技术的实施例的描述并不意图是详尽的或将本技术限制于上文所公开的确切形式。在上下文允许的情况下,单数或复数术语还可以分别包含复数或单数术语。如相关领域的技术人员将认识到的,尽管上文出于说明性目的描述了本技术的特定实施例和实例,但是可在本技术的范围内进行各种等效的修改。例如,虽然步骤以给定顺序呈现,但是替代性实施例可以以不同顺序执行步骤。还可以将本文所描述的各个实施例进行组合以提供另外的实施例。
如本文所用,术语“大体上”、“基本上”、“约”和类似术语用作近似术语而不用作程度术语,并且旨在考虑到所属领域普通技术人员将认识到的所测量或所计算值的固有偏差。
此外,除非词语“或”明确地限制成仅意指对参考两个或更多个项目的列表的其它项目排他的单个项目,否则这类列表中的“或”的使用可以理解为包含:(a)列表中的任何单个项目,(b)列表中的所有项目或(c)列表中的项目的任何组合。另外,术语“包括”贯穿全文用以意指至少包含一个或多个所叙述特征,使得不排除任何更大数的相同特征和/或额外类型的其它特征。还应了解,本文出于说明的目的已经描述了特定实施例,但是可以在不脱离本技术的情况下进行各种修改。另外,虽然已经在那些实施例的情境中描述了与本技术的某些实施例相关联的优势,但其它实施例也可以呈现这类优势,且并非所有的实施例都必需呈现这类优势以落入本技术的范围内。因此,本公开和相关联的技术可以涵盖未明确地在本文中示出或描述的其它实施方案。
Claims (34)
1.一种医疗装置递送系统,其包括:
细长管状构件,所述细长管状构件具有远端部分、近端部分和延伸穿过其中的内腔;
联接元件,所述联接元件耦接到所述细长管状构件的远端部分,所述联接元件包括:
缓冲器,所述缓冲器具有被构造成接合医疗装置的近侧部分的远端部分;
近侧部分,所述近侧部分邻近所述细长管状构件的所述远端部分,其中所述近侧部分限定具有沿第一方向的长度的狭槽;以及
孔口,所述孔口延伸穿过所述缓冲器和所述近侧部分,所述孔口具有沿第二方向的第一横截面尺寸和沿不同于所述第二方向的第三方向的第二横截面尺寸,所述第一横截面尺寸大于所述第二横截面尺寸,其中所述第一方向大致正交于所述第二方向;以及
细长轴,所述细长轴具有远侧区域和在所述远侧区域的近侧的扁平区域,所述扁平区域具有小于所述孔口的所述第一横截面尺寸但大于所述孔口的所述第二横截面尺寸的最大横截面尺寸,其中所述扁平区域至少部分被接纳在所述狭槽内。
2.根据权利要求1或2所述的医疗装置递送系统,其中,当所述扁平区域被接纳在所述狭槽内时,所述扁平区域防止或限制所述细长轴相对于所述联接元件的远侧移动。
3.根据权利要求1至3中任一项所述的医疗装置递送系统,所述联接元件进一步包括被定位在所述细长轴上方和所述缓冲器的远侧的鼻部。
4.根据权利要求3所述的医疗装置递送系统,其中所述鼻部耦接到所述细长轴。
5.根据权利要求1至4中任一项所述的医疗装置递送系统,其中所述细长轴为线、海波管或线圈中的至少一种。
6.一种用于医疗装置递送系统的核心组件,其包括:
细长管状构件,所述细长管状构件具有远端部分、近端部分和延伸穿过其中的内腔;
联接元件,所述联接元件耦接到所述管状构件的所述远端部分,所述联接元件包括:
缓冲器,所述缓冲器具有邻接所述细长管状构件的所述远端部分的近侧面;
近侧部分,所述近侧部分在所述近侧面的近侧延伸并进入所述细长管状构件的所述内腔;以及
孔口,所述孔口延伸穿过所述缓冲器和所述近侧部分,所述孔口具有沿第一径向轴线的第一横截面尺寸和沿第二径向轴线的第二横截面尺寸,所述第一横截面尺寸大于所述第二横截面尺寸;以及
细长轴,所述细长轴耦接到所述联接元件,所述细长轴包括:
中间部分,所述中间部分向缓冲器部分远侧延伸,并且被构造成在其上接纳医疗装置;
近侧部分,所述近侧部分延伸穿过所述联接元件孔口;以及
接合特征,所述接合特征沿所述近侧部分设置,所述接合特征具有沿第一径向方向的第一径向最外尺寸和沿第二径向方向的第二径向最外尺寸,所述第一径向最外尺寸小于所述孔口的所述第一横截面尺寸和所述第二横截面尺寸,所述第二径向最外尺寸小于所述孔口的所述第一横截面尺寸但大于所述孔口的所述第二横截面尺寸。
7.根据权利要求6所述的核心组件,其中所述联接元件的所述近侧部分包括被构造成接纳所述接合特征的狭槽。
8.根据权利要求6或7所述的核心组件,其中所述细长轴基本上是圆柱形的,并且其中所述接合特征包括所述细长轴的已经扁平的区域。
9.根据权利要求6至8中任一项所述的核心组件,其中所述第一径向轴线基本上垂直于所述第二径向轴线。
10.根据权利要求6至9中任一项所述的核心组件,其中缓冲器的远侧面被构造成邻接所述医疗装置的近端。
11.根据权利要求6至10中任一项所述的核心组件,其中所述细长管状构件是沿其长度具有一个或多个柔性增强切口的海波管。
12.根据权利要求6至11中任一项所述的核心组件,其中所述细长轴是线。
13.根据权利要求6至12中任一项所述的核心组件,其中所述医疗装置为支架。
14.根据权利要求6至13中任一项所述的核心组件,其中所述医疗装置为管状编织植入物。
15.一种医疗装置递送系统,其包括:
海波管,所述海波管具有近侧部分、远侧部分和延伸穿过其中的内腔;
联接元件,所述联接元件被定位在所述海波管的所述远侧部分处,所述联接元件包括:
缓冲器部分,所述缓冲器部分具有邻接所述海波管的远端的面向近侧的表面;
近侧部分,所述近侧部分从所述远侧部分向近侧延伸,使得所述近侧部分被定位在所述海波管的所述内腔内;以及
孔口,所述孔口延伸穿过所述缓冲器部分和所述近侧部分,其中所述孔口具有沿第一径向方向的第一横截面尺寸和沿第二径向方向的第二横截面尺寸,所述第二横截面尺寸小于所述第一横截面尺寸;以及
细长构件,所述细长构件具有位于近侧的附接部分,所述位于近侧的附接部分包含延伸穿过所述孔口的保持区域和远离所述细长构件的纵向轴线比所述保持区域更大程度地侧向延伸的加宽区域,其中所述加宽区域被构造成在第一定向上适配穿过所述孔口并在第二定向上与所述缓冲器和所述近侧部分碰撞。
16.根据权利要求15所述的医疗装置递送系统,其中缓冲部分的远侧面被构造成邻接医疗装置的近端。
17.根据权利要求15或者16所述的医疗装置递送系统,其中所述加宽区域接合所述联接元件的所述近侧部分,并限制所述细长构件相对于所述联接元件的远侧移动。
18.根据权利要求15至17中任一项所述的医疗装置递送系统,其中所述联接元件的所述近侧部分包括具有沿第三径向方向的长度的狭槽。
19.根据权利要求18所述的医疗装置递送系统,其中所述加宽区域被构造成被接纳在所述狭槽内。
20.根据权利要求18或19所述的医疗装置递送系统,其中所述第一径向方向基本上垂直于所述第三径向方向。
21.根据权利要求15至20中任一项所述的医疗装置递送系统,其中所述细长构件为线、海波管或线圈中的至少一种。
22.一种医疗装置递送系统,其包括:
细长管状构件,所述细长管状构件具有远端部分、近端部分和延伸穿过其中的内腔;
联接元件,所述联接元件耦接到所述细长管状构件的远端部分,所述联接元件包括:
缓冲器,所述缓冲器具有被构造成接合医疗装置的近侧部分的远端部分;
近侧部分,所述近侧部分设置在所述缓冲器的近侧并邻近所述细长管状构件的所述远端部分;
鼻部,所述鼻部具有在近端部分和远端部分之间延伸的主体,所述鼻部的所述近端部分邻近所述缓冲器的所述远端部分;以及
孔口,所述孔口延伸穿过所述缓冲器,所述孔口具有沿第一方向的第一横截面尺寸和沿不同于第一方向的第二方向的第二横截面尺寸,所述第一横截面尺寸大于所述第二横截面尺寸;以及
细长轴,所述细长轴具有远侧区域和在所述远侧区域的近侧的扁平区域,所述扁平区域具有小于所述第一横截面尺寸但大于所述第二横截面尺寸的最大横截面尺寸。
23.根据权利要求22所述的医疗装置递送系统,其中所述近侧部分包括具有沿第三方向的长度的狭槽。
24.根据权利要求23所述的医疗装置递送系统,其中所述扁平区域被构造成被接纳在所述狭槽内。
25.根据权利要求24所述的医疗装置递送系统,其中,当所述扁平区域被接纳在所述狭槽内时,所述扁平区域防止或限制所述细长轴相对于所述联接元件的远侧移动。
26.根据权利要求22至25中任一项所述的医疗装置递送系统,其中所述鼻部耦接到所述细长轴。
27.根据权利要求26所述的医疗装置递送系统,其中将所述鼻部耦接到所述细长轴包括将所述鼻部焊接到所述细长轴。
28.根据权利要求22至27中任一项所述的医疗装置递送系统,其中所述孔口为第一孔口,所述联接元件进一步包括延伸穿过所述鼻部且与所述第一孔口对准的第二孔口。
29.根据权利要求22至28中任一项所述的医疗装置递送系统,其中所述细长轴为线、海波管或线圈中的至少一种。
30.一种组装医疗装置递送系统的方法,其包括:
将缓冲器耦接到细长管状构件的远端部分,所述缓冲器包括:
主体,所述主体具有邻接所述细长管状构件的所述远端部分的近侧面和被构造成邻接医疗装置的近侧部分的远侧面;
近侧部分,所述近侧部分在所述近侧面的近侧延伸并进入所述细长管状构件的内腔,所述近侧部分具有长度沿第一径向轴线的狭槽;以及
孔口,所述孔口延伸穿过所述主体和所述近侧部分,所述孔口具有沿第二径向轴线的第一横截面尺寸和沿第三径向轴线的第二横截面尺寸,所述第一横截面尺寸大于所述第二横截面尺寸;
利用所述孔口来定向细长轴,所述细长轴具有沿所述细长轴的近侧部分设置的接合特征,所述接合特征具有沿第一径向方向的第一径向最外尺寸和沿第二径向方向的第二径向最外尺寸,其中利用所述孔口来定向所述细长轴包括将所述第二径向方向与所述第二径向轴线对准;
通过所述第一孔口向远侧移动所述细长轴的所述接合特征;
将所述第二径向方向与所述第一径向轴线对准;以及
向近侧移动所述细长轴的所述接合特征,直到所述接合特征被接纳在所述缓冲器的所述近侧部分的所述狭槽内。
31.根据权利要求30所述的方法,其进一步包括将鼻部与所述细长轴耦接,所述鼻部在所述缓冲器的所述主体的所述远侧面的远侧的位置处与所述细长轴耦接。
32.根据权利要求30或31所述的方法,其中所述接合特征的所述第一径向最外尺寸小于所述孔口的所述第一横截面尺寸和所述第二横截面尺寸,并且其中所述接合特征的所述第二径向最外尺寸小于所述孔口的所述第一横截面尺寸但大于所述孔口的所述第二横截面尺寸。
33.根据权利要求30至32中任一项所述的方法,其中所述第一径向轴线基本上垂直于所述第二径向轴线。
34.根据权利要求30至33中任一项所述的方法,其中所述第一径向轴线基本上平行于所述第三径向轴线。
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