公开(公告)号：EP0664990A3

公开(公告)日：1997-11-19

申请号：EP95300413.2

申请日：1995-01-24

Applicant: HEART RHYTHM TECHNOLOGIES, INC.

Inventor： Lipson, David ,  Jensen, Marc

IPC: A61B5/042

CPC classification number: A61B5/0422 ,  A61B2562/0209 ,  A61B2562/043

Abstract: A mapping and ablating catheter having a short distal tip electrode (40, 58, 68), comprising a bio-compatible outer surface and a thermal dissipating mass for dissipating heat received by the electrode. The outer surface may be formed by plating a thin layer of gold or platinum on the dissipating mass, or the entire electrode may be formed of a homogenous material such as a gold alloy that is bio-compatible thereby forming the outer surface with the mass itself. An alloy having a thermal conductivity greater than pure platinum is used so that the ablation procedure can be completed before exceeding the temperature limits. In one case, the entire electrode was formed of an 88% gold 12% nickel alloy. The electrical feed to the electrode is oversized to also dissipate heat received by the electrode. The electrode is no greater than five mm in length yet produces an ablation volume equal to or greater than longer electrodes. One or more band electrodes (70) may also include thermal dissipating masses.

公开(公告)号：EP0664990A2

公开(公告)日：1995-08-02

申请号：EP95300413.2

申请日：1995-01-24

Applicant: HEART RHYTHM TECHNOLOGIES, INC.

Inventor： Lipson, David ,  Jensen, Marc

IPC: A61B5/042

CPC classification number: A61B5/0422 ,  A61B2562/0209 ,  A61B2562/043

Abstract: A mapping and ablating catheter having a short distal tip electrode (40, 58, 68), comprising a bio-compatible outer surface and a thermal dissipating mass for dissipating heat received by the electrode. The outer surface may be formed by plating a thin layer of gold or platinum on the dissipating mass, or the entire electrode may be formed of a homogenous material such as a gold alloy that is bio-compatible thereby forming the outer surface with the mass itself. An alloy having a thermal conductivity greater than pure platinum is used so that the ablation procedure can be completed before exceeding the temperature limits. In one case, the entire electrode was formed of an 88% gold 12% nickel alloy. The electrical feed to the electrode is oversized to also dissipate heat received by the electrode. The electrode is no greater than five mm in length yet produces an ablation volume equal to or greater than longer electrodes. One or more band electrodes (70) may also include thermal dissipating masses.

Abstract translation: 一种具有短的远端尖端电极（40,58,68）的测绘和消融导管，包括生物相容的外表面和用于耗散由电极接收的热量的散热物质。 外表面可以通过在消散物质上镀上金或铂的薄层而形成，或者整个电极可以由诸如金合金的均匀材料形成，该金合金是生物相容的，从而与质量本身形成外表面 。 使用具有大于纯铂的热导率的合金，使得可以在超过温度限制之前完成烧蚀过程。 在一种情况下，整个电极由88％的12％镍合金形成。 电极的电力供给过大，也会散发由电极接收的热量。 电极长度不大于5mm，但产生等于或大于较长电极的烧蚀体积。 一个或多个带状电极（70）也可以包括散热块。