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公开(公告)号：EP3552569A1
公开(公告)日：2019-10-16
申请号：EP19175744.2
申请日：2016-03-23
IPC分类号： A61B18/14
摘要： An RF ablation system (10) includes a catheter (12) having a lumen therein and a first electrode (18). A second electrode (20) is disposed around the catheter (12) proximate the distal end (14) of the catheter (12) and spaced from the first electrode (18) by an insulating spacer which may be a part (36) of the catheter (12) or a sleeve (42) on the first electrode (18). The first electrode (18) is able to slide in and out of the catheter (12) in order to vary the exposed length of the first electrode (18) and as a result to alter the energy density at the first electrode (18) in order to exhibit different heating effects. A control unit (24) controls current through the electrodes (18, 20) and also the exposed length of the first electrode (18). The second electrode (20) has a surface area at least twice that of the first electrode (18) in order to act as a dispersive of electrode. As a consequence, negligible heat is generated at the second electrode (20) and therefore no blood clotting or other ablation material is formed over the catheter (12).
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公开(公告)号：EP3192552A1
公开(公告)日：2017-07-19
申请号：EP17275003.6
申请日：2017-01-13
CPC分类号： A61M25/09 , A61B1/0055 , A61M25/09041 , A61M2025/0063 , A61M2025/0915
摘要： A guide wire (50) includes a plurality of segments (60-80) which can interlock rotatably relative to one another. A locking element (240) extends through a lumen of the segments (60-80). When the locking element (240) is in an unlocked condition the segments (60-80) are able to rotate relative to one another. In this mode, the guide wire (50) is very flexible. The locking element (240) can be tightened to cause the segments to lock in engagement with one another and to fix the guide wire (50) in position. In practice, the guide wire can be fixed in a curved or bent configuration, which enables the guide wire (50) to provide a rigid support for a microcatheter or other element of an introducer assembly. The guide wire (50) therefore can exhibit both extreme flexibility and stiffness.
摘要翻译： 导丝（50）包括多个可相对于彼此可旋转地互锁的节段（60-80）。 锁定元件（240）延伸穿过区段（60-80）的内腔。 当锁定元件（240）处于解锁状态时，区段（60-80）能够相对于彼此旋转。 在这种模式中，导丝（50）非常灵活。 可以拧紧锁定元件（240）以使这些部分锁定成彼此接合并且将导丝（50）固定就位。 实际上，导丝可以以弯曲或弯曲的构型固定，这使得导丝（50）能够为导引器组件的微导管或其他元件提供刚性支撑。 导丝（50）因此可以具有极高的柔韧性和刚度。
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3.发明公开
公开(公告)号：EP3181077A1
公开(公告)日：2017-06-21
申请号：EP16275172.1
申请日：2016-12-05
CPC分类号： A61B18/10 , A61B17/12022 , A61B18/08 , A61B18/082 , A61B2017/00132 , A61B2017/00154 , A61B2017/00159 , A61B2018/00083 , A61B2018/00148 , A61B2018/00345 , A61B2018/00577 , A61B2018/00589 , A61B2018/00702 , A61B2018/0072 , A61B2018/00767 , A61B2018/00821 , A61B2018/1435 , A61N1/36125 , A61N1/3956
摘要： The preferred embodiment provides apparatus (10) for ablating a vessel (80) by generating heat within a vessel to cause blood clotting to occlude the vessel. The apparatus includes an electrically resistive element (30) at the distal end (20) of the apparatus (10), the resistive element (30) being uncoated and therefore in bare form. An alternating current supply (24) feeds electrical current through the resistive element (30) to cause heating of the element (30) and surrounding blood or tissue. The alternating current power supply (24) preferably is balanced about a centre point so as to create a net sum of alternating pulses of zero. It has been found that the supply of alternating current to the resistive element (30) reduces or eliminates corrosion of the resistive element (30) in blood as the resistive element (30) is heated. Use of conductive coatings for a sacrificial anode can be avoided.
摘要翻译： 该优选实施例提供了用于通过在血管内产生热量来引起血液凝结以堵塞血管来消融血管（80）的装置（10）。 该设备包括在设备（10）的远端（20）处的电阻元件（30），电阻元件（30）未被涂覆并因此为裸露形式。 交流电源（24）通过电阻元件（30）馈送电流以引起元件（30）和周围血液或组织的加热。 交流电源（24）优选地围绕中心点平衡，以便产生零交替脉冲的净和。 已经发现，当电阻元件（30）被加热时，向电阻元件（30）供应交流电减少或消除了血液中的电阻元件（30）的腐蚀。 可以避免使用导电涂层作为牺牲阳极。
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