公开(公告)号：US06714806B2

公开(公告)日：2004-03-30

申请号：US09952869

申请日：2001-09-14

申请人： Paul A. Iaizzo ,  Timothy G. Laske ,  Woohyek Choi

发明人： Paul A. Iaizzo ,  Timothy G. Laske ,  Woohyek Choi

IPC分类号： A61B504

CPC分类号： A61B5/053 ,  A61B5/05 ,  A61N1/056 ,  A61N1/0573

摘要： An improved system for monitoring the status of an IMD such as a medical electrical lead during an implant procedure is provided. The system includes a signal generator for supplying a first signal such as a constant current or voltage to the IMD. A resulting voltage or current signal is generated, respectively, and may be sensed as an indication of the impedance of a portion of the body that is proximal to one or more electrodes carried by the lead. This impedance indication is converted to an audible signal having a frequency that is proportional to the amplitude of the impedance indication. The pitch of the audible signal therefore rises when measured impedance increases, and drops as the impedance decreases. These pitch changes allow a user to determine positional information associated with the IMD, including the degree of lead tissue contact and extent of fixation of a device to tissue.

摘要翻译： 提供了一种改进的系统，用于在植入过程期间监视诸如医疗电线之类的IMD的状态。 该系统包括用于向IMD提供诸如恒定电流或电压的第一信号的信号发生器。 分别产生所得到的电压或电流信号，并且可以将其感测为身体接近于由引线承载的一个或多个电极的部分的阻抗的指示。 该阻抗指示被转换成具有与阻抗指示的幅度成比例的频率的可听信号。 因此，当测量的阻抗增加时，听觉信号的音调会上升，并随着阻抗的降低而下降。 这些间距变化允许用户确定与IMD相关联的位置信息，包括铅组织接触的程度和装置固定到组织的程度。