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31. 发明授权

US06270476B1 Catheter 有权
标题翻译：导管
公开(公告)号：US06270476B1
公开(公告)日：2001-08-07
申请号：US09298234
申请日：1999-04-23
申请人： Domenic Santoianni , Daniel Nahon , Dan Wittenberger , Jean-Pierre Lalonde , Cristian Petre
发明人： Domenic Santoianni , Daniel Nahon , Dan Wittenberger , Jean-Pierre Lalonde , Cristian Petre
IPC分类号： A61M3700
CPC分类号： A61M25/0144 , A61B18/02 , A61B2017/003 , A61B2018/0212 , A61B2018/0262 , A61M25/00 , A61M25/0147
摘要： A catheter for ablating tissue, for example to treat a cardiac arrhythmia, includes a handle, a shapeable shaft and a distal ablation segment. The shaft retains a first position until manipulated to a further position with the application of moderate manual pressure. The shaft incorporates plastically deformable elements and is shapeable to conform to an insertion path or the particular anatomy of a patient for accessing a site to be ablated. Once shaped, the shaft retains its shape as the catheter is inserted or manipulated to the predetermined tissue treatment location and the distal segment is urged into contact with the tissue site. A deflection mechanism may be provided to facilitate navigation to, or to deflect the ablation segment into conformal contact with, the tissue target. In a further or alternative embodiment, a second or auxiliary shaft member extends distally from the ablation segment, allowing the segment to be threaded by or pulled past occluding tissue to a remote target tissue site. By gripping the end of the second shaft, the flexible ablation segment may be either tensioned or pulled inward against, or flexed and pushed outward against a treatment site, such as a region of the posterior epicardial wall, thus providing more effective contact for a broad range of dispositions and tissue orientations. In another embodiment, a thermal shield extends over a portion of the ablation segment, shielding adjacent tissue from damage while still effectively exposing the target tissue to ablation energy. The shield may be rotated or moved axially to delimit an area of cryogenic contact and achieve better protection of surrounding tissue structures in occluded or remote treatment target regions.
摘要翻译：用于烧蚀组织的导管，例如用于治疗心律失常，包括手柄，可成形的轴和远端消融段。轴保持第一位置，直到操纵到另一个位置，同时施加适度的手动压力。该轴结合了可塑性变形的元件，并且可变形成符合插入路径或患者的特定解剖结构以访问要消融的部位。一旦成形，当导管插入或操纵到预定的组织处理位置时，轴保持其形状，并且远端段被推动与组织部位接触。可以提供偏转机构以便于导航到组织靶或使消融段与组织靶标保形接触。在另一个或替代的实施例中，第二或辅助轴构件从消融段向远侧延伸，允许该段被螺纹穿过或者通过闭塞组织拉至远端目标组织部位。通过夹持第二轴的端部，柔性消融段可以被张紧或者向内抵抗抵抗或弯曲并向外抵靠治疗部位（例如后心外膜壁的区域）向外拉，从而为广泛的配置范围和组织取向。在另一个实施例中，热屏蔽层延伸在消融段的一部分上，屏蔽相邻组织免受损伤，同时仍然有效地将目标组织暴露于消融能量。护罩可以旋转或轴向移动以限定低温接触的区域，并且在封闭或远程治疗目标区域中实现对周围组织结构的更好保护。

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