公开(公告)号：US5117824A

公开(公告)日：1992-06-02

申请号：US612760

申请日：1990-11-14

申请人： John G. Keimel ,  Joseph A. Ballis ,  Glenn M. Roline

发明人： John G. Keimel ,  Joseph A. Ballis ,  Glenn M. Roline

IPC分类号： A61N1/362 ,  A61N1/37

CPC分类号： A61N1/3704 ,  A61N1/3621

摘要： An implantable cardiac pacemaker and/or cardioverter/defibrillator employing an R-wave detector which atuomatically adjusts its sensing threshold in response to R-wave amplitude. The R-wave detector produces an output which is used to indicate the occurrence of ventricular contractions, and is used to reset the timing of the pacemaker and to indicate the occurrence of ventricular contractions for purposes of activating the associated cardioverter/defibrillator. Adjustment of the threshold is disable for a predetermined period following the delivery of each pacing pulse such that in the presence of continuous pacing for a predetermined period of time, the sensing threshold is returned to a desired, lower threshold level, allowing for detection of lower level R-waves, which may be indicative of tachyarrhythmia or fibrillation. The R-wave detector disclosed also eliminates the necessity for blanking of the input of the sense amplifier following sensing of naturally occurring R-waves, without increasing susceptibility to sensing of spontaneous T-waves which occur thereafter.

摘要翻译： 一种可植入式心脏起搏器和/或心律转复/除颤器，其采用R波检测器，其响应于R波振幅而自动调整其感测阈值。 R波检测器产生用于指示心室收缩发生的输出，并且用于重置起搏器的时间并指示心室收缩的发生以用于激活相关的心律转复器/除颤器。 在每个起搏脉冲传送之后的预定时间段内禁止阈值的调节，使得在存在连续起搏预定时间段的情况下，感测阈值返回到期望的较低阈值电平，允许检测较低的 水平R波，其可以指示快速性心律失常或颤动。 所公开的R波检测器还消除了在感测天然存在的R波之后消隐读出放大器的输入的必要性，而不增加对其后发生的自发T波的敏感性。

公开(公告)号：US5016645A

公开(公告)日：1991-05-21

申请号：US264916

申请日：1988-10-31

申请人： Terrell Williams ,  John G. Keimel ,  Roger Rugland ,  Richard Sandstrom ,  Timothy Holleman

发明人： Terrell Williams ,  John G. Keimel ,  Roger Rugland ,  Richard Sandstrom ,  Timothy Holleman

IPC分类号： A61N1/05

CPC分类号： A61N1/0587

摘要： A medical electrode lead employing one or more elongated electrode coils embedded in the surface of a flexible base pad. The electrode coils take the form of space wound coils following tortuous paths over the surface of the base pad to provide a large surface area electrode. The electrode coils include a plurality of spaced, generally parallel electrode coil segments. Located intermediate adjacent the parallel electrode coil segments are grooves or pleats, molded into the base pad. These grooves or pleats provide increased elasticity of the electrode and increased ability to conform to the contours of the heart. Insulative cores taking the form of plastic tubes are located within the electrode coils to prevent tissue ingrowth between the individual electrode coils, without induly reducing flexibility of the electrode.

摘要翻译： 一种医用电极引线，其使用一个或多个细长的电极线圈嵌入在柔性基座的表面中。 电极线圈在基座表面上的曲折路径之后呈空间缠绕线圈的形式，以提供大的表面积电极。 电极线圈包括多个间隔开的大致平行的电极线圈段。 位于平行电极线圈段附近的中间是凹槽或褶皱，模制到基座中。 这些凹槽或褶皱提供了电极的增加的弹性和增加符合心脏轮廓的能力。 采取塑料管形式的绝缘芯位于电极线圈内，以防止单个电极线圈之间的组织向内生长，而不会显着降低电极的柔性。