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1. 发明授权

US5680859A Integrated introducer and drive rod positioning system for a fetal spiral electrode 失效
标题翻译：用于胎儿螺旋电极的综合导引器和驱动杆定位系统
公开(公告)号：US5680859A
公开(公告)日：1997-10-28
申请号：US540920
申请日：1995-10-11
申请人： Kenard E. Urion , George R. Allen , Richard A. Clement , Clete A. Eichelberger
发明人： Kenard E. Urion , George R. Allen , Richard A. Clement , Clete A. Eichelberger
IPC分类号： A61B5/0448
CPC分类号： A61B5/4362 , A61B5/0448
摘要： An integrated introducer and drive rod system used to position and attach a spiral-shaped, biological needle probe to a fetus during labor and delivery. The system ensures that the sharp, pointed, probe (typically, a fetal spiral electrode) remains protected in a retracted position inside the introducer until attachment to the fetal scalp is desired. The flexible drive rod of the system has a "C"-shaped safety ring with an outside diameter slightly less than the inner diameter of the introducer at a point on the introducer; a "C"-shaped radial web with an outside diameter only slightly larger than the inner diameter of the introducer creating an interference fit between the drive rod and the introducer; or a "C"-shaped segmented rib that engages the rear end of the introducer. The introducer has an inner diameter sized to create an interference fit with the drive rod; a forward interior wall with an inside diameter slightly less than the outside diameter of the safety ring; a ramp on the front end of the introducer; a longitudinal slot disposed along its entire length; or a combination of one or more of these structures. In combination, the structures of the drive rod and introducer resist but (upon exertion of a predetermined force on the handle of the drive rod) allow translation of the drive rod within the introducer.
摘要翻译：一个整合的导引器和驱动杆系统，用于在工作和分娩过程中将螺旋形的生物针头探针定位并附着到胎儿。该系统确保尖锐的探针（通常是胎儿螺旋电极）在引导器内的缩回位置保持保护，直到需要连接到胎儿头皮。系统的柔性驱动杆具有“C”型安全环，其外径稍微小于导引器的内径; “C”型径向腹板，其外径仅略大于导引器的内径，从而在驱动杆和导引器之间形成过盈配合; 或与导引器的后端接合的“C”形分段肋。引导器具有尺寸设定成与驱动杆形成过盈配合的内径; 前内壁的内径略小于安全环的外径; 引导器前端的斜坡; 沿其整个长度设置的纵向槽; 或这些结构中的一个或多个的组合。组合在一起，驱动杆和导引器的结构抵抗，但是（在驱动杆的手柄上施加预定的力时）允许驱动杆在导引器内的平移。

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