CN102149421A - 用于抑制分泌物流入功能评估导管的系统和方法 - Google Patents
用于抑制分泌物流入功能评估导管的系统和方法 Download PDFInfo
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Abstract
公开了用于防止或抑制分泌物进入用于肺的功能评估导管的内腔中、或者移除所汇集的分泌物的装置、系统和方法。该导管包括构造成防止或抑制分泌物流入内腔的可膨胀元件、盖或者内部部件。替代地或附加地,该导管包括远端,该远端构造成便于空气流动、吸收分泌物或者排斥分泌物以使分泌物远离导管梢端。替代地或附加地,导管包括诸如可卷绕线或阻塞器之类的内部元件,该内部元件构造成防止分泌物被抽吸到内腔中,或者主动地移除分泌物。替代地或附加地,该导管包括对肺通道进行干燥、通气或抽吸的元件。
Description
技术领域
本发明总地涉及导管,更确切地涉及用于使分泌物最小程度地进入导管的导管设备和方法,并且更具体地涉及那些用于评估肺功能的导管。
背景技术
慢性阻塞性肺病是影响1600万人或者约6%美国人口的严重医学问题。该组疾病中的特定疾病包括慢性支气管炎、气喘性支气管炎以及肺气肿。虽然使用并已提出许多治疗干预手段,然而这些治疗干预手段都不是完全有效的,而慢性阻塞性肺病仍是美国第四大常见死因。因此,改进和替代性的治疗和疗法将具有显著益处。
具体考虑本发明,通常通过切除肺的病变部分来减小有效肺活量,由此可以改善受某些形式的慢性阻塞性肺病困绕的患者的肺功能。切除肺的病变部分不仅促进肺的非病变部分的扩张,而且减少被吸入空气的进入肺中但却无法将氧传递至血液的部分。对肺活量的减小通常以在所要切除的肺处的开胸术或胸腔镜术来进行,其中通常使用具有一体的切割刀的缝合器。
虽然传统的肺减容手术(LVRS)在很多情形中是有效的,然而此种肺减容手术对患者带来显著的创伤,即使在使用胸腔镜术时仍如此。此种疗法通常会不小心切除健康的肺组织,并经常在肺中留下孔或其它的非连续性结构,这致使剩余的肺漏气。即使技术上成功的手术仍会产生呼吸衰竭、肺炎和死亡。此外,许多年长或虚弱的患者无法经受这些手术。
作为LVRS的替代,支气管肺减容术(ELVR)使用引入支气管的装置,这些引入装置使肺的病变隔室与较健康区域阻塞或隔离开,以实现减小病变隔室的容积。隔离装置可以植入到对肺的病变区域进行馈送的主气道中,并且在植入之后通过吸收性肺不张或者在植入之前通过使目标隔室因主动吸气而陷缩来实现减少容积。这些所植入的隔离装置可以是例如自膨胀闭塞支架或单向阀,自膨胀闭塞支架防止空气沿两个方向流动,而单向阀使空气仅仅沿呼气方向流动。
虽然ELVR比LVRS具有显著改进,然而当肺中的治疗区域暴露于来自邻近区域的侧支通气时,ELVR的治疗效果有限。肺包括多个称为肺隔室或肺叶的隔室,这些隔室由呈双层折叠映像(enfloded reflections)的肺胸膜(称为裂隙)彼此隔开。虽然将隔室隔开的裂隙通常是不可渗透的,然而对于经受COPD的患者来说,这些裂隙通常是不完整的,留出用于侧支气流或小叶间侧支通气的通道。此种侧支气流会致使空气侵入由ELVR所治疗的被隔离肺隔室中,因此减小或消除所希望的容积减小效果。
可通过使用在例如共同待审查的、同样由本申请人所有的在2005年12月7日提交的美国专利申请系列号11/296591(US2006/0264772A1)和在2006年10月18日提交的美国专利申请系列号11/550660(US2007/0142742A1)中所描述的方法来检测通向病变肺隔室的侧支流量。
该导管包括导管本体以及位于该导管本体上的可膨胀阻塞部件。该导管本体通常具有远端、近端以及至少一个内腔,该内腔从远端处或远端附近的位置延伸至近端处或近端附近的位置。导管本体的至少远端部分适合于行进到肺的气道中并通过肺的气道,以使该远端能到达对所要评估的目标肺隔室或部段进行馈送的气道。诸如可充胀气囊之类的可膨胀阻塞部件设置在导管本体的远端附近,并且适合于在对目标肺隔室或部段进行馈送的气道中膨胀,从而当阻塞部件膨胀时,使所述隔室或部段能隔离,而仅能通过内腔或导管本体提供到达的通道。同时,通过使导管远端在气道内对中,可膨胀阻塞部件可增添导管功能。在此状态下,阻止所吸入的空气进入导管内腔,与此同时从所隔离的肺隔室呼出的空气仅仅能通过导管内腔排出。
呼出的空气离开导管内腔的近端,该导管内腔的近端联接于外部控制台。该控制台对呼出空气的诸如流量和压力之类的特性进行监测,并且就与这些特性相关联的值与使用者通信。如果流量和压力随时间下降,则使用者可确定肺部段并不经受侧支通气,且该部段由ELVR适当地治疗。
虽然使用这些程序能识别患者可能受益于ELVR疗法,但仍存在改进的需要,尤其是在包含诸如粘液之类的身体分泌物的肺通道中进行评估时。例如,如果粘液进入导管内腔,则将阻碍空气流入内腔,由此干扰外部控制台的监测功能,并且会产生错误的结果。此外,在使用可充胀气囊的导管中,气囊会部分地由于由粘液所形成的气泡而扩大。这致使导管倾斜到通道中,从而潜在地阻塞开口。此外,当使用阻塞器来引导导管并随后抽出该阻塞器时,该阻塞器会起到注射器或活塞的作用,并将粘液带到导管内腔中。
为此,希望提供用来在含有分泌物的肺通道内进行肺功能评估的替代和改进的方法和设备。具体地说,希望提供如下的方法、系统以及装置,其通过从导管内腔排出分泌物、抑制分泌物积聚在通道内、清除导管内腔内的分泌物或者上述的任意组合来增强导管的功能性。这些目标中的至少一些目标将通过下文所描述的发明来满足。
发明内容
本发明公开了用于防止或抑制分泌物进入用于肺的功能评估导管的内腔中的装置和方法。该功能评估导管包括:导管轴,该导管轴用于插到肺通道中,且该导管轴具有远端、近端以及远端和近端之间的内腔;节流元件,该节流元件设置在导管轴的远端处以与肺通道密封配合,其中,该节流元件具有膨胀构造和收缩构造;以及若干变型中的一个或多个变型。
一方面,将导管改成包括可膨胀元件,以防止或抑制分泌物流入内腔,其中可膨胀元件具有打开构造和闭合构造。此种可膨胀元件可由包括网、可膨胀材料或刚性材料的任何材料构成。
另一方面,将导管改成包括覆在远端开口上的可移除盖,以防止或抑制分泌物流入内腔。
另一方面,将导管的远端改成包括孔、吸液材料或疏水性材料,这些孔便于空气流动,吸液材料用于吸收分泌物,且由此防止分泌物流入内腔,而疏水性材料用于排斥分泌物并使分泌物远离导管梢端。另一方面,导管包括诸如可卷绕线、阻塞器之类的内部元件,该内部元件构造成防止分泌物被吸到内腔中,或者主动地移除分泌物。
另一方面,导管包括对肺通道进行干燥、通气或抽吸的元件。
本发明的其它方面包括与上述装置和系统相对应的方法。
附图说明
从结合附图而对本发明和所附权利要求所进行的以下详细说明中,本发明的其它优点和特征将变得更加明显,附图中:
图1a至1d示出导管的示例实施例,该导管提供将分泌物引离导管的远端开口的部件。
图2a和2b示出如下导管:该导管包括能使分泌物汇集并远离导管开口的元件。
图3示出包括一替代实施例的导管,该导管吸引并汇集分泌物,使分泌物远离导管开口。
图4a至4b示出另一示例实施例,该实施例提供吸引分泌物使之离开导管远端开口的元件。
图5a和5b示出将分泌物吸引至导管开口远侧的一点处的替代方法。
图6a至6d示出包括各种盖的导管实施例。
图7示出用于导管远侧梢端的、可逐渐移除的盖。
图8考虑即使当导管的远端开口并未在肺通道内对中时也能增强评估的方法。
图9示出将分泌物引至远离导管梢端的位置的另一实施例。
图10示出将分泌物引至远离导管梢端的位置的另一实施例。
图11示出将分泌物较佳地引至远离导管内腔的位置的替代方法。
图12考虑一旦分泌物实际上已进入导管时对导管内腔进行清洗的方法。
图13示出通过对导管的远侧梢端进行修改而排斥分泌物的替代方法。
图14示出附连于注射器的导管。
具体实施方式
尽管详细描述包含很多具体例子,但这些不应解释为是对本发明范围的限制,而仅仅解释为对本发明的不同示例和方面进行说明。应理解的是,本发明的范围包括并未详细描述的其它实施例。对那些本领域技术人员显而易见的是,可在不偏离在此描述的本发明精神和范围的条件下,对在此披露的本发明的方法和设备的设置、操纵和细节进行修改、改变和变型。
本发明涉及用于防止分泌物妨碍肺评估导管(此后简称为导管)功能的方法、系统和装置。
可以单独或组合地使用在此描述的各种导管实施例。一方面,可通过防止分泌物进入导管内腔来防止分泌物妨碍导管功能。附加地或替代地,可防止或抑制分泌物积聚在气道中。附加地或替代地,可移除汇集在气道内的分泌物。附加地或替代地,可将分泌物排斥远离导管的远侧梢端。
图1a示出提供可膨胀元件的示例性实施例,该可膨胀元件吸引分泌物远离导管100的远端开口,并在导管输送至评估位置的过程中,阻止分泌物进入导管100。导管100可选地在其远端附近包括可膨胀阻塞部件,例如可充胀气囊101。能够形成篮状构造的网110附连在靠近导管100的远侧梢端、并且在气囊101远侧的一点处。网110由例如镍钛诺之类的生物相容的形状记忆材料构成。可选的是,网110可至少在其一些部分上包括诸如硅树脂之类的覆盖层。在初始构造中,网110形成用于导管100的远端开口的盖。如图1a所示,在将导管100输送至评估位置时,盖保持闭合。因此,在此种输送过程中,将阻止分泌物进入导管100的内腔。网110的近端联接于例如线或阻塞器之类的细长部件111,该细长部件构造成操纵网110。在网110展开之前,该细长部件111对网110进行约束,并防止网膨胀至其形状记忆构造。在评估位置处,通过缩回细长部件111将使网110展开,由此使网110从约束中释放以膨胀至其形状记忆构造。通过展开,网110获得图1b的剖视图中所示的构造。在此种构造中,这些分泌物将被捕获在网110的外直径内,由此将这些分泌物引离内腔的远侧梢端。此外,由于分泌物的表面张力,这些分泌物将倾向于在网110内汇集,由此分泌物将延迟进入或不进入内腔。与此同时,网110的打开构造使导管100的内腔保持在肺通道内对中,而不是朝肺通道内的壁倾斜。
替代地或附加地,如图1c所示,可在导管100的内腔内包含网篮。在该实施例中,导管100包括网120,该网120在导管100的远侧梢端内处于陷缩构造,直到导管100运动到评估位置为止。导管100可选地还包括气囊101。网120由例如镍钛之类的生物相容的形状记忆材料构成。可选的是,网110可至少在其一些部分上包括诸如硅树脂之类的不透气覆盖层。网120的近端联接于例如线或阻塞器之类的细长部件121,该细长部件构造成操纵网120。该细长部件121可包含在导管100的内腔壁内(如图1c所示),或者可包含在导管100内或导管100上的任何地方。在评估之前,网120展开。网120形成具有充足孔隙度的球状结构,以使空气能流动通过网120。与此同时,分泌物将倾向于粘附于网120的外直径,由此分泌物将延迟进入或不进入导管100的内腔。
或者,如图1d所示,该网形成漏斗状结构130,该结构允许将空气引导到导管内腔中。在该实施例中,导管100包括网130,该网130在导管100的远侧梢端内处于陷缩构造,直到导管100运动到评估位置为止。网130由例如镍钛之类的生物相容的形状记忆材料构成。可选的是,网130可至少在其一些部分上包括诸如硅树脂之类的不透气覆盖层132。网130的近端联接于例如线或阻塞器之类的细长部件131,该细长部件构造成操纵网130。该细长部件131可包含在导管100的内腔内(如图1c所示),或者可包含在导管100内或导管100上的任何地方。在评估之前,网130展开以呈现其漏斗状的形状记忆结构,该结构的基部打开至导管100的开口并且与该开口配合。在该实施例中,网130用于阻止分泌物进入导管,同时将通道内的空气引到导管100的内腔中。分泌物将倾向于粘附于网130的外直径,由此分泌物将延迟进入或不进入导管100的内腔。与此同时,当展开时,具有覆盖层132的网130用于对通道进行密封,并使导管100在通道内对中,从而空气的唯一出口是通过漏斗状结构进入导管内腔。因此,在该实施例中,网130可替代前述实施例中所示的气囊101。
图2a示出可充胀元件130,该可充胀元件能使分泌物汇集并远离导管100的开口。在一个实施例中,可充胀元件130在导管100上位于气囊101远侧。在输送过程中,如图2a的剖视图所示,可充胀元件130的远侧梢端处于非充胀状态,并覆盖导管100的开口。当充胀时,如图2b的剖视图所示,可充胀元件130打开以露出导管100的内腔。与此同时,当可充胀元件130充胀打开时,向外推动已由此大大积聚的分泌物并使这些分泌物远离导管100的内腔。此外,该可充胀元件130使导管100的远侧梢端在肺通道内保持对中。替代地或附加地,可充胀元件130与肺通道的壁密封配合,以执行气囊101的功能。
图3示出对于图2所示实施例的替代实施例。以剖视图示出的此实施例考虑可陷缩刚性元件140,通过诸如线141之类的包含在导管100内或该导管上的细长部件来操纵该刚性元件。本附图示出包含在导管100的壁内的线141。可由使用者前后拉伸该线141以打开和关闭刚性元件140。在此构造中,分泌物将沿元件140或在元件140后方再次汇集,而不是进入导管100的内腔。
图4a以剖视图示出提供如下元件的另一示例性实施例:该元件吸引分泌物远离导管100的远端开口,并在导管输送至评估位置的过程中,阻止分泌物进入导管100。在该实施例中,远侧梢端200包括若干设置成从远侧梢端200径向突出的线股210。因此,远侧梢端200看起来类似于具有若干刚毛的刷子。这些线股210由任何适合的生物相容材料构成。线股210的构造使空气能在评估过程中流入导管100的内腔。与此同时,分泌物粘附于线股210,而远离导管100的开口。可选的是,导管100的远侧梢端200还包括若干小孔211。导管100的远侧梢端200中的孔211便于使空气流入导管100。可选的是,可在通道内对远侧梢端200进行操纵,例如使该远侧梢端进行向后和向前运动,以对评估区域进行清洁。可选的是,远端处的线股210可以是或不是均匀长度,而这些线股210可以形成具有不同剖面的实施例。此外,导管100的远端部段能可分离地联接于或永久地贴附于导管100的远侧梢端200。
附加地或替代地,如图4b所示,线股210连接于包含在导管100内的、诸如线或阻塞器212之类的细长部件。同样地将它输送至评估位置。在评估位置,带有线股的部件212从导管内腔展出并进入肺通道。一方面,带有线股的部件212可在导管100的端部远侧的一点处保持固定,以使分泌物偏离。另一方面,带有线股的部件212可沿肺通道运动,以对肺通道进行清洁,并在此后在导管100远侧的一点处保持固定或者通过导管100的内腔而缩回。此外,远端处的线股210可以是或不是均匀长度,而这些线股可以形成具有不同剖面的实施例。
图5a和5b示出将分泌物吸引至导管开口远侧的一点处的替代实施例。在该实施例中,叉齿220从导管100的远端纵向突出。这些叉齿220可由包括镍钛诺、PTFE或硅树脂的任何生物相容材料所制成。如图5a所示,在将导管100输送至评估位置的过程中,叉齿220例如使用环221来保持闭合,该环221连接于包含在导管100内或该导管上的线222。如图5b所示,在评估位置,例如通过拉动线222以缩回环221来打开叉齿220。如果叉齿220是疏水性的,则叉齿通过排斥分泌物来防止这些分泌物进入导管100的内腔,或者,如果叉齿220是亲水性的,则叉齿较佳地通过吸引分泌物来防止这些分泌物进入导管100的内腔。
在本发明的另一实施例中,如图6a到6d所示,可设置盖以防止分泌物进入导管100内腔。导管100包括覆于远端开口上的盖。此外,导管100包括线311,该线沿导管100的内腔长度从使用者可触及的近端行进至远端处的盖。线311可以是软的或刚性的。该线可包含在导管100的内腔壁内,或者可包含在导管100内或导管100上的任何地方。在导管100运动至评估位置的过程中,盖保持覆于导管100的远端开口上。在评估之前或评估的过程中,通过对线进行操纵来打开或关闭盖。
例如,图6a示出导管100包括折合盖310,其中所述盖的一端由线311来操纵。在闭合位置,折合盖呈现位置(1)中所示的构造。当拉动线311时,如位置(2)所示,折合盖310打开以使空气能流入导管100,从而进行评估。
图6b中提供另一示例,它示出包括软盖320的导管100,该软盖可由线321向前拉动或缩回。软盖320可由诸如塑性膜之类的任何柔性材料制成,当该软盖通过导管100的内腔而撤回时,软盖提供极小的吸气或不提供吸气。在导管100的输送过程中,软盖320覆盖导管100的远端开口,由此防止或抑制分泌物进入导管100。在评估之前或与评估同时,通过线321操纵软盖320,导管100的远端开口打开来接纳气流以用于评估。
或者,如图6c所示,盖可对导管100的远端开口进行封闭。在该实施例中,封闭盖330可对导管100的开口进行封闭。封闭盖330附连于线330,并且可以被推出而进入肺通道以进行评估程序。
在另一实施例中,如图6d所示,盖可以是导管100的内腔内的气囊340。气囊340附连于诸如线341之类的细长部件,该细长部件具有足够小的直径,从而当被拉出时不会用作注射器。当气囊340充胀时,该气囊防止分泌物进入导管100的内腔。在评估过程中,该气囊可收缩,并随线341一起被拉回以留出开口的导管内腔。
图7示出用于导管100的远侧梢端的盖,可逐渐移除该盖。导管100的远侧梢端包括多层盖340,该多层盖具有由生物相容材料制成的可移除层345。导管100的远侧梢端可以是穿孔的或者可以不是穿孔的。这些层345可通过一个或多个诸如包含在这些层内的线341之类的附件逐渐移除,该线沿导管100的长度延伸至使用者。此外,生物相容材料可以是或者可以不是亲水的。在一实施例中,可以将导管100的远侧梢端输送至评估位置,在该评估位置处移除这些层345。在另一实施例中,可以在评估过程中逐渐移除这些层345。例如,在导管100中具有孔的实施例中,如果分泌物阻碍空气流入导管100,则可移除若干层345,以露出导管100中的另一组孔。
图8考虑如下方法:例如通过可充胀气囊101的胀大而即使当导管100的远端开口并未在肺通道内对中时仍增强评估。在该实施例中,导管100在远端处包括导管壁内的孔410。这些孔410可以在保持导管100一体性的同时具有任何尺寸或形状并且可组织成任何型式。例如,这些孔410是细长的,以使导管100能保持结构刚度。这些孔410分散在导管100的整个周缘,从而即使导管100的其中一些开口被分泌物所堵塞,其它开口仍将保持畅通。此外,即使导管100的一部分倾斜抵靠肺通道的壁,所相对的部分将使其中一些孔410暴露于包含在肺通道内的气体。因此,将不会影响导管100的评估功能。
图9示出另一实施例,它将分泌物引至远离导管100的梢端的位置。在该实施例中,细长线圈510从导管100的远侧梢端展开。该细长线圈510可以由例如镍钛之类的任意的生物相容形状记忆材料制成。当将导管100输送至评估位置时,细长线圈510以诸如线511之类的直线构造包含在导管100的内腔壁内。然后,从远端开口推出线511,且该线511卷绕以在肺通道内呈现细长线圈510的构造。或者,在将导管100输送至评估位置时,细长线圈510能以压缩但卷绕的状态包含在导管100的内腔壁内。然后,该细长线圈510能展开到肺通道中,该细长线圈将在该肺通道中膨胀至内腔壁内。沿壁通道的分泌物将粘附于细长线圈510的与肺通道相接触的点,而不是粘附于导管100。与此同时,细长线圈510的内直径打开,并且使足够的空气能流入评估导管100。在另一实施例中,细长线圈510将覆盖导管100远端的一部分。
图10示出另一实施例,它将分泌物引至远离导管100的梢端的位置。在该实施例中,扁平线圈520从导管100的远侧梢端展开。该线圈可以由例如镍钛之类的任意的生物相容形状记忆材料制成。当将导管100输送至评估位置的过程中,该线圈以诸如线521之类的直线构造包含在导管100的内腔壁内。然后,将线521推出远侧表面,且该线511在肺通道内呈现细长线圈510。或者,在将导管100输送至评估位置时,扁平线圈520能以压缩但卷绕的状态包含在导管100的内腔壁内。然后,该细长线圈520能展开到肺通道中,在此该细长线圈将膨胀至肺通道的直径。沿肺通道的分泌物将粘附于扁平线圈520的与肺通道壁相接触的点。与此同时,扁平线圈520的内直径将允许足够的空气流入评估导管100,由此使足够的空气能流入评估导管100。
图11示出将分泌物较佳地引至远离导管100内腔的位置的替代方法。导管100的远侧梢端包括诸如由吸收材料610制成的覆盖层或垫或纸盆之类的附件。吸收材料610可包括任何的生物相容吸收材料,并且可膨胀或者不可膨胀。在评估过程中,吸收材料610的覆盖层可以终止于内腔的远端附近。因此,评估位置处的分泌物将由吸收材料所吸收。当一些分泌物由吸收材料610所吸收时,该吸收材料凝聚性地吸引更多分泌物。因此,此后到达评估位置的分泌物将被吸引至吸收材料610,而不是吸引至导管100的壁。
图12示出通过改变导管100的远侧梢端而排斥分泌物的替代方法。传统地,导管涂覆有粘附于分泌物的PEBAX。本实施例考虑对远侧梢端涂覆诸如PTFE之类的疏水物质910,以将分泌物引离导管100的内腔。
图13考虑一旦分泌物实际上已进入导管100而对导管100的内腔进行清洗的方法。在该实施例中,导管100的内腔包括诸如线710之类的细长内部部件,该细长内部部件从近端延伸至远端,并在远端处终止于径向元件711中。如图13的剖视图所示,径向元件711的外直径基本类同于或略小于导管100的内直径。如果分泌物进入导管100的内腔,则该径向元件711沿远侧方向运动并经过许多待移除的分泌物,随后该径向元件沿近侧方向返回运动,由此使包含在内腔内的分泌物沿近侧方向运动,并且可选地从导管100的近端移除这些分泌物。或者,径向元件711沿远侧方向运动,以沿远侧方向推动包含在内腔内的分泌物。
本发明的另一实施例考虑替代性的阻塞器。在该实施例中,阻塞器具有不同的形状,以在导管远端处施加极小负压力或没有负压力的同时保持移出足够的分泌物,由此使该阻塞器能在不拉拽分泌物的条件下缩回。例如,阻塞器的截面可以是花形、星形或十字形。附加地或替代地,该阻塞器可以是中空的。中空阻塞器此外可用作抽吸端口,以在输送过程中、评估过程中或它们的任何组合中对肺通道进行抽吸。
附加地或替代地,阻塞器构造成用作阿基米德螺杆。只要导管100的远端开口遇到分泌物,螺杆状阻塞器就将使这些分泌物通过导管100并远离评估位置。
在本发明的另一实施例中,一个或多个元件能储存在导管内或储存在导管的远侧梢端上,以进行干燥或者阻止分泌物积聚在导管内。例如,可使用加热元件以干燥气道。或者,可将使粘液形成最少的药物(例如,粘液溶解药)涂覆在导管梢端上。此种药可慢慢地从覆盖层分散出来而进入周围组织,并持续地释放药物,从而能防止粘液形成或使粘液形成最少,或者对由局部组织所分泌的粘液进行破坏。
在本发明的另一实施例中,可提供至少一个额外的内腔和相对应的端口,以对通道进行抽吸、冲洗通道、使通道通气、将粘液溶解药引到通道中或者以上的任何组合。或者,可通过已有的内腔和端口来实现抽吸。通过导管的经修改的近端部分以便于该抽吸,该经修改的近端部分被构造成将流体(例如空气)引导到导管中。所引入的流体将从导管的远端流出,并带有充分的力以对积聚在导管嘴部附近或周围的分泌物进行干燥(如果使用空气或其它气体的话)或者推动这些分泌物。
图14中示出此种经修改的近端部分的示例。在该实施例中,该装置的近端部分构造成接纳流体推进机构800。诸如注射器的流体推进机构包括在该装置的近端处的推进部分810、在装置的远端处的释放阀830以及这两者之间的加压器820。推进部分810还包括进口801、腔室802以及柱塞803。流体被引到进口801中,并且通过拉动柱塞803而以类似注射器的方式被抽吸到腔室802中。进口801构造成单向或者可关闭,以阻止流体从腔室802流出进口801。此后,将柱塞803推到腔室802中,以将流体引入加压器820。通过释放阀830阻止流体从机构800的远端流出,该释放阀在原始设定状态下保持于闭合位置。与此同时,流体在加压器820中保持在压力下。当需移除分泌物时,打开释放阀830。已在压力下积聚在加压器820中的流体将从机构800流出并进入导管100(未示出)。在流体从导管100(未示出)的远端流出时,该流体将具有充足的力,并且该流体将干燥积聚在导管端部周围的分泌物或使这些分泌物运动。
在另一实施例中,导管100被构造成在不使用阻塞器的条件下在输送过程中保持结构刚度。
在另一实施例中,导管100的梢端被构造成呈角度,以增强流入导管内腔的气流。
在另一实施例中,气囊101由诸如盐水之类的流体充胀,以提供附加的稳定性。这将有助于使导管100在肺通道内保持对中。或者,将气囊101制造成当充胀时结构对称。
上述实施例中的任何实施例或所有实施例可以在评估之前结合药物或更换药物。
虽然上文对本发明的较佳实施例进行完全描述,然而可使用各种替代方案、变型以及等价物。因此,上述描述不应被认为对由所附权利要求所限定的本发明的范围有所限制。
Claims (13)
1.一种用于肺的功能评估导管,所述导管包括:
导管轴,所述导管轴用于插到肺通道中,且所述导管轴具有远端、近端以及在所述远端和所述近端之间的内腔;
可膨胀的节流元件,所述节流元件设置在所述导管轴的远端处,以与所述肺通道密封配合;以及
用于防止或抑制分泌物流入所述内腔的装置。
2.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置包括可膨胀的网。
3.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置包含在所述导管内腔内。
4.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置是可充胀的。
5.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置是刚性的。
6.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置是可移除的盖。
7.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置是可吸液材料以吸收分泌物,由此防止或抑制分泌物流入所述内腔。
8.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置包括至少部分地包含在中心通道内的线圈,所述线圈较佳地吸引分泌物,由此抑制或防止分泌物进入所述导管内腔。
9.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置包括具有远端的阻塞器,其中,所述阻塞器所具有的截面被构造成:(a)当所述阻塞器的远端定位在所述导管轴的远端处时,防止或抑制分泌物流入所述内腔;以及(b)在所述导管的远端处施加极小负压力压力或没有负压力,由此使所述阻塞器能在不拉拽分泌物的条件下缩回。
10.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置包括疏水性覆盖层以排斥分泌物,由此防止或抑制分泌物进入所述内腔;以及
可膨胀的节流元件,所述节流元件设置在所述导管轴的远端处,以与所述肺通道密封配合。
11.如权利要求1所述的导管,其特征在于,所述用于防止或抑制分泌物流入所述内腔的装置包含流体推进机构,所述流体推进机构用于将流体引到所述导管内腔中。
12.一种用于肺的功能评估导管,所述导管包括:
导管轴,所述导管轴用于插到肺通道中,且所述导管轴具有远端、近端以及在所述远端和所述近端之间的内腔,
其中,所述远端包括孔以便于气流流入所述内腔;以及
可膨胀的节流部件,所述节流部件设置在所述导管轴的远端处,以与所述肺通道密封配合。
13.一种用于肺的功能评估导管,所述导管包括:
导管轴,所述导管轴用于插到肺通道中,且所述导管轴具有远端、近端以及在所述远端和所述近端之间的内腔;
可膨胀的节流部件,所述节流部件设置在所述导管轴的远端处,以与所述肺通道密封配合;以及
细长内部部件,所述细长内部部件终止于径向元件,所述径向元件的外直径不大于所述导管的内直径,且所述径向元件构造成移除包含在所述导管内腔内的分泌物。
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Also Published As
Publication number | Publication date |
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CN102149421B (zh) | 2014-12-10 |
EP2323720A1 (en) | 2011-05-25 |
US20110251509A1 (en) | 2011-10-13 |
WO2010030691A1 (en) | 2010-03-18 |
EP2323720A4 (en) | 2013-04-10 |
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