CN109890433A - 用于蠕动泵的接触管 - Google Patents
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Abstract
一种用于蠕动泵的泵接触管,其包括具有外表面的管状芯体以及在该外表面上的处理层。所述处理层减少在所述蠕动泵操作期间在所述管状芯体上的静电荷累积,并因此减少噪声信号,其否则可能被不期望地耦合到目的信号。处理层包括丁腈层、热缩层、棉纤维层和防静电喷涂层。
Description
相关申请的交叉引用
本申请要求于2016年11月2日提交的美国临时申请号62/416,204的权益,其被援引纳入本文,如同在本文中被完全阐述一样。
背景技术
本文涉及灌注电生理学导管。特别是,本文涉及用于降低灌注电生理学导管系统中的电噪声的装置和方法。
导管被用于越来越多的医疗处置。仅举几个例子,导管被用于诊断、治疗和消融处置。通常,医生操作导管通过患者的脉管系统到达预期部位,例如患者心脏内的部位。所述导管通常携带有一个或多个电极(在所谓“电生理学导管”的情况下)或其它诊断或治疗装置,其可被用于消融、诊断、心脏标测等。
灌注电生理学导管也是已知的。灌注电生理学导管是电生理学导管,其配备成将如盐水的灌注流体输送到电极附近的部位。所述灌注流体例如用于冷却电极或冲散在其中的体液、冷却或洗涤周围组织,和/或在相对高导电性流体的情况下将电极耦合到组织表面。
在许多灌注电生理学导管中,蠕动泵用于输送灌注流体。蠕动泵通常通过旋转安装在转子上的多个辊来操作,以周期性地压缩所述辊和泵壳体或支架之间的灌注管,这迫使灌注流体通过所述灌注管。
然而众所周知,蠕动泵可能产生电噪声,该电噪声可能会不期望地耦合到由所述灌注电生理学导管上的所述电极测得的电图信号、耦合到连接至主体的电解剖学可视化、定位和/或位置系统,和/或耦合到其它诊断或治疗设备。这种噪声在本文中称为“噪声信号”。噪声信号的分量包括静电放电(“ESD”)。
发明内容
本文公开一种用于蠕动泵的泵接触管,其包括:具有外表面的管状芯体;以及在管状芯体的外表面上的处理层,其中该处理层减少在蠕动泵操作期间在管状芯体上的静电荷累积。所述管状芯体可包括第一材料以及所述处理层可包括围绕所述管状芯体形成的第二材料层,其中第二材料不同于第一材料。或者,所述处理层可包括围绕所述管状芯体形成的、混合有防静电添加剂的第一材料层。所述处理层可沿着管状芯体的外表面的任意部分或全部长度延伸。
可预期的是,与所述第一材料相比,所述第二材料的摩擦起电等级更接近零。例如所述第二材料可是丁腈、热缩材料或棉纤维。替代地或附加地,所述处理层可包括防静电喷涂处理。
在本文的实施例中,所述处理层也可包括在蠕动泵的操作期间减小管状芯体的磨损。
所述泵接触管也可包括位于其相对端的第一键和第二键。所述键可适于将泵接触管和灌注管互连。
本文还公开了用于灌注电生理学导管的灌注系统,其包括:蠕动泵;和泵接触管。所述泵接触管包括:具有外表面的管状芯体,和在管状芯体的外表面上的处理层,其中所述处理层减少由所述蠕动泵的操作引起的噪声信号。
在本文的实施例中,所述处理层减少由所述蠕动泵的操作引起的在泵接触管上的静电累积。例如,所述处理层可包括围绕所述管状芯体的防静电层(例如丁腈层、热缩材料层、棉纤维层和/或防静电喷涂层)。
根据本文的另一方面,一种用于蠕动泵的降噪泵接触管的制造方法,其包括形成围绕管状芯体的减噪层。
所述减噪层可通过围绕管状芯体的丁腈层来形成,例如通过围绕所述管状芯体浸涂丁腈层。
所述减噪层还可通过共同挤出第一材料的管状芯体以及第二材料的降噪来形成,第二材料不同于第一材料。
在其它实施例中,所述减噪层还可通过利用防静电喷涂来喷涂管状芯体来形成。
在进一步的实施例中,所述减噪层可通过围绕所述管状芯体形成棉纤维层来形成。
在更进一步的实施例中,所述减噪层可通过围绕所述管状芯体形成热缩层来形成。
通过阅读以下描述和权利要求书以及通过阅读附图,本发明的前述和其它方面、特征、细节、效用和优点将变得显而易见。
附图说明
图1描绘了蠕动泵。
图2为代表性的静电放电噪声信号。
图3为泵接触管的说明性的横截面图,其描绘了本文公开的管状芯体和减噪层。
图4是根据本文的方面的代表性的双极电图,其使用丁腈减噪层。
图5是根据本文内容的方面的代表性的双极电图,其使用棉纤维减噪层。
图6是根据本文内容的方面的代表性的双极电图,其使用丙烯酸酯-烯烃热收缩减噪层。
图7是根据本文内容的方面的代表性的双极电图,其使用共同挤出的不含DEHP的减噪层。
图8A是根据本文的方面的代表性的双极电图,其使用通用防静电减噪层。
图8B是根据本文内容的方面的代表性的双极电描记图,其使用聚氨酯水晶防静电剂的减噪层。
具体实施方式
图1描绘出了蠕动泵10,例如St.Jude Medical公司的Cool PointTM灌注泵。蠕动泵10的构造和操作对于本领域的普通技术人员而言是很熟悉的(参见例如美国专利申请公开号2007/0224063,其被援引纳入本文,如同在本文中被完全阐述一样),以使得不需在本文中进行详细解释。相反,下面只描述蠕动泵10的与理解本文相关的那些特征。
蠕动泵10通常包括壳体12、支架14以及转子16。转子16包括围绕转子16的外周间隔开的多个辊,并且安装为绕轴18旋转。
管通道20限定在支架14和转子16之间。管通道20容纳灌注管22。灌注管22的一端可连接到合适的灌注流体容器,而灌注管22的相对端可连接到灌注电生理学导管。因此当操作时,蠕动泵10将灌注流体从容器移动到所述电生理学导管内,灌注流体在那里移动经过一个或多个灌注腔并经由一个或多个灌注端口流出。
灌注管22的一部分,在本文称为泵接触管24,定位在支架14和转子16之间,并通过键25与灌注管22的其余部分互连。本领域普通技术人员可以理解的是,当转子16转动时,辊将周期性地(如果围绕转子16的外周均匀地间隔开)作用至泵接触管24,推动泵接触管24抵靠支架14并迫使流体通过灌注管22以向电生理学导管提供灌注流体的脉动流。
如上所述,蠕动泵10的操作可产生噪声信号,尤其是由于ESD。所述噪声信号会不期望地耦合到目的电信号(例如用于心内电极测量的双极电图)。图2示出了示意性的ESD噪声信号。
本文提供了泵接触管24的各种改型和改进,其期望地减少或消除所述噪声信号。在图3中示意性地说明了本文的若干实施例,图3是根据在本文中公开的方面的泵接触管24的横截面图。
如图3所示,泵接触管24包括柔性的、聚合的且呈管状的芯体26。管状芯体26可以被制成不含邻苯二甲酸酯(DEHP)的管,例如来自Saint-Gobain Performance Plastic的ND-100-65,其使用偏苯三酸三辛酯(TOTM)作为塑化剂。将不含DEHP的材料用于管状芯体26是期望的,因为它保持了生物相容性,但是在不脱离本发明教导的范围的情况下,其它生物相容性材料可用于管状芯体26。
图3还示出了在管状芯体26的外表面上的处理层28。如下面更详细的讨论,处理层28减少了在蠕动泵10的操作期间在管状芯体26上的静电荷累积,并因此减少了由蠕动泵10的操作引起的噪声信号。因此,处理层28在本文中也称为“减噪层”。
如图3所示,期望使处理层28覆盖管状芯体26的整个外周。还期望处理层28足够厚(例如在图3中的径向上),使得在蠕动泵10的操作期间不会以使管状芯体26暴露于转子16的方式受损。就此而言,在本文的实施例中,附加的保护材料层30可被施加至处理层28上,以增强处理层28的耐久性。仅举例来说,层30可包括蜡、硬脂酸锌、芥酸酰胺和其它耐磨材料。用于层30中的材料可被选择成不损害处理层28在蠕动泵10的操作期间减少管状芯体26上的静电荷累积的能力。
在本文的多个实施例中,处理层28在泵接触管24的整个长度上被施加(例如图1中的两个键25之间的整个长度)。在其它实施例中,处理层28仅被施加至转子16附近的泵接触管24的部分(例如图1中虚线29之间的约3英寸长的区域)。
根据本文的多个方面,处理层28是材料不同于管状芯体26的材料层(例如它不是ND-100-65)。例如,处理层28可是围绕管状芯体26形成的丁腈层,例如通过浸涂或其它方式将丁腈橡胶层紧固至管状芯体26上。图4描绘了使用用作处理层28的丁腈层所造成的代表性的电图信号。
期望地,图4的电图信号基本上没有噪声信号。本发明人认为,这一优点至少部分归因于丁腈橡胶(+3)在摩擦起电等级上比管状芯体26的材料(通常约-70)更接近0。
在本文的更进一步方面,处理层28可为棉纤维层。棉纤维(+5)在摩擦起电等级上也比管状芯体26的材料(通常约-70)更接近0。图5描绘了使用用作处理层28的棉纤维层所造成的代表性的电图信号。
在本文的其它方面,处理层28可为热缩材料层,例如丙烯酸酯-烯烃。图6描绘了使用用作处理层28的丙烯酸酯-烯烃热缩材料所造成的代表性的电图信号。
处理层28也可与管状芯体26共同挤出。如本领域普通技术人员理解的,共同挤出是指将两种或更多种材料通过同一模具进行挤压以产生单件的工艺。因此,处理层28可为不同于管状芯体26的不含DEHP的材料,例如同样来自Saint-Gobain Performance Plastic的E-LFL管。可预计的是,管状芯体26提供结构支撑以促进灌注剂输送,而处理层28单独提供相对于管状芯体26的噪声信号的改善,例如图7的代表性的电图信号中所示,其描绘了使用用作处理层28的、共同挤出的E-LFL层所造成的代表性的电图信号。
在其它实施例中,在处理层28中的共挤出的材料包括与不含DEHP材料相混合的防静电添加剂,该不含DEHP的材料可与管状芯体26的不含DEHP的材料相同或不同。
还可预期的是,处理层28可为施加至管状芯体26的外表面上的防静电喷涂层。图8A示出了使用用作处理层28的通用静电剂所造成的代表性的电图信号,而图8A示出了使用用作处理层28的聚氨酯水晶防静电剂所造成的代表性的电图信号。
尽管上面已经以一定程度的特殊性描述了本发明的若干实施例,但是本领域技术人员可在不脱离本发明的精神或范围的情况下对本文实施例进行多种改型。
例如,本文的教导可结合美国专利申请公开号2012/0165735,其被援引纳入本文,如同在本文中被完全阐述一样,以实现噪声信号的最小化和/或消除的更进一步改进。
作为另一个例子,虽然图3将处理层28和层30描绘为两个分立的层,但它们也可实施为包含两种材料的单个层,例如通过使层30的耐磨材料浸渍或混合有处理层28的降噪材料。因此,在本文的实施例中,保护材料(例如蜡、硬脂酸锌、芥酸酰胺等)可混合有处理层28的材料(例如丁腈)。
所有的方向性参考(如,上、下、向上、向下、左、右、向左、向右、顶、底、之上、之下、垂直、水平、顺时针和逆时针)都仅用于指定目的,以帮助阅读者理解本发明,而不会产生限制,特别是关于位置、取向或发明的使用。连结参考(如,附于、接合、连接等)都被最宽地解释,且可以包括连接元件之间的中间构件以及在各元件之间的移动。同样地,连结参考不一定推断出两个元件是直接连接的且彼此处于固定关系。
应该理解,所用包含在上述描述中的或者显示在附图中的事物都应该被理解成示意性的而非限制性的。可以在没有脱离由所附权利要求书限定出的本发明的精神的情况下对细节或结构做出改变。
Claims (26)
1.一种用于蠕动泵的泵接触管,所述泵接触管包括:
具有外表面的管状芯体;以及
在该管状芯体的外表面上的处理层,其中所述处理层减少在所述蠕动泵的操作期间在所述管状芯体上的静电荷累积。
2.如权利要求1所述的泵接触管,其中所述管状芯体包括第一材料,并且所述处理层包括围绕所述管状芯体形成的第二材料层,其中所述第二材料不同于所述第一材料。
3.如权利要求2所述的泵接触管,其中与所述第一材料相比,所述第二材料的摩擦起电等级更接近零。
4.如权利要求2所述的泵接触管,其中所述第二材料包括丁腈。
5.如权利要求2所述的泵接触管,其中所述第二材料包括热缩材料。
6.如权利要求2所述的泵接触管,其中所述第二材料包括棉纤维。
7.如权利要求2所述的泵接触管,其中所述第二材料包括防静电添加剂。
8.如权利要求1所述的泵接触管,其中所述处理层包括防静电喷涂处理层。
9.如权利要求1所述的泵接触管,其中所述处理层还在所述蠕动泵的操作期间减小所述管状芯体的磨损。
10.如权利要求1所述的泵接触管,进一步包括:
在所述泵接触管的第一端的第一键;以及
在所述泵接触管的第二端的第二键,
其中所述第一键和所述第二键适于将所述泵接触管和灌注管互连。
11.如权利要求1所述的泵接触管,其中所述处理层的延伸长度不到所述管状芯体的外表面的全长。
12.如权利要求1所述的泵接触管,其中所述管状芯体包括第一材料层,以及所述处理层包括围绕所述第一材料层形成的、混合有防静电添加剂的第二材料层。
13.一种用于灌注生理学导管的灌注系统,包括:
蠕动泵;以及
泵接触管,其包括:
具有外表面的管状芯体;以及
在该管状芯体的外表面上的处理层,其中所述处理层减少在所述蠕动泵的操作期间引起的噪声信号。
14.如权利要求13所述的灌注系统,其中所述处理层减少所述蠕动泵的操作所造成的在泵接触管上的静电累积。
15.如权利要求13所述的灌注系统,其中所述处理层包括围绕所述管状芯体的防静电层。
16.如权利要求15所述的灌注系统,其中所述防静电层包括丁腈层。
17.如权利要求15所述的灌注系统,其中所述防静电层包括热缩层。
18.如权利要求15所述的灌注系统,其中所述防静电层包括棉纤维层。
19.如权利要求15所述的灌注系统,其中所述防静电层包括防静电喷涂层。
20.一种用于蠕动泵的减噪泵接触管的制造方法,该方法包括形成围绕管状芯体的减噪层。
21.如权利要求20所述的方法,其中形成围绕管状芯体的减噪层包括形成围绕所述管状芯体的丁腈层。
22.如权利要求21所述的方法,其中形成所述围绕管状芯体的丁腈层包括围绕所述管状芯体浸涂所述丁腈层。
23.如权利要求20所述的方法,其中形成围绕管状芯体的减噪层包括共同挤出第一材料的所述管状芯体和第二材料的减噪层,其中所述第二材料不同于所述第一材料。
24.如权利要求20所述的方法,其中形成围绕管状芯体的减噪层包括利用防静电喷涂来喷涂管状芯体。
25.如权利要求20所述的方法,其中形成围绕管状芯体的减噪层包括形成围绕所述管状芯体的棉纤维层。
26.如权利要求20所述的方法,其中形成围绕管状芯体的减噪层包括形成围绕所述管状芯体的热缩层。
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JP2022546135A (ja) * | 2019-09-03 | 2022-11-02 | バイオセンス・ウエブスター・(イスラエル)・リミテッド | 静電気及びノイズをなくすためのカテーテル構築物 |
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