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公开(公告)号：US20170296260A1
公开(公告)日：2017-10-19
申请号：US15485690
申请日：2017-04-12
CPC分类号： A61B18/1482 , A61B18/1492 , A61B2017/00867 , A61B2018/00267 , A61B2018/00285 , A61B2018/00404 , A61B2018/00416 , A61B2018/00577 , A61B2018/00589 , A61B2018/00791
摘要： The present disclosure provides for a device and methods of use to endoluminally ablate and/or occlude a body vessel using a radiofrequency (“RF”) signal. The device has two conductive elements or electrodes that form various electrical circuits, and the two conductive elements are operable to create an electrical field. The electrical field ablates the body vessel, forming an occlusion.
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公开(公告)号：US20170172644A1
公开(公告)日：2017-06-22
申请号：US15379683
申请日：2016-12-15
摘要： The preferred embodiment provides apparatus for ablating a vessel by generating heat within a vessel to cause blood clotting to occlude the vessel. The apparatus includes an electrically resistive element at the distal end of the apparatus, the resistive element being uncoated and therefore in bare form. An alternating current supply feeds electrical current through the resistive element to cause heating of the element and surrounding blood or tissue. The alternating current power supply 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 reduces or eliminates corrosion of the resistive element in blood as the resistive element is heated. Use of conductive coatings for a sacrificial anode can be avoided.
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公开(公告)号：US20170290622A1
公开(公告)日：2017-10-12
申请号：US15485357
申请日：2017-04-12
CPC分类号： A61B18/082 , A61B2018/00404 , A61B2018/00416 , A61B2018/00577 , A61B2018/0063 , H05B3/54 , H05B3/80
摘要： The present disclosure provides for a device and methods of use to endoluminally ablate and/or occlude a body vessel using a current to perform resistive heating. The device includes a resistive coil, which in some embodiments has a portion with a first, higher average pitch which can be electrified, and a second, lower average pitch, which is not electrified but aids in relieving mechanical stress. The device may have a support, which may be a wire guide, around which the coil is disposed. The device may provide a minimal diameter and flexibility for navigation of tortuous vessels.
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公开(公告)号：US20160278843A1
公开(公告)日：2016-09-29
申请号：US15079858
申请日：2016-03-24
CPC分类号： A61B18/1233 , A61B18/082 , A61B18/14 , A61B18/1492 , A61B2018/00041 , A61B2018/00083 , A61B2018/00398 , A61B2018/00404 , A61B2018/00577 , A61B2018/00589 , A61B2018/00714 , A61B2018/00791 , A61B2018/1407
摘要： A medical ablation system includes an elongate element to be inserted endoluminally into a patient's vessel and includes at its distal end a pre-heating element and an ablation element. The system provides pre-heating of, for example, blood to a first threshold temperature above body temperature but below ablation temperature; and then a second heating stage provided by the ablation element. Pre-heating reduces the amount of energy required to effect ablation, resulting in more focussed embolization with a higher proportion of energy delivered to the area in a more controlled manner. The arrangement can reduce the amount of damage to surrounding tissues and organs.
摘要翻译： 医疗消融系统包括被插入患者血管中的细长元件，并在其远端包括预热元件和消融元件。 该系统将例如血液预热到高于体温但低于消融温度的第一阈值温度; 然后由消融元件提供的第二加热台。 预热减少了实现消融所需的能量，导致更多的聚焦栓塞，以更受控的方式以较高比例的能量输送到该区域。 该装置可以减少对周围组织和器官的损伤量。
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公开(公告)号：US20200268441A1
公开(公告)日：2020-08-27
申请号：US16721241
申请日：2019-12-19
摘要： An energy delivery guide wire (10) including a guide wire proximal portion (12), a guide wire distal portion (14) and an energy delivery tip (16) extending from the distal portion (14); the energy delivery tip (16) having a tip length, a proximal tip end (18) and a distal tip end (20); at least the guide wire distal portion (14) extending in a first direction in an unbiased condition; the energy delivery tip (16) extending in a second direction different from the first direction; wherein the distal tip end (20) is offset from the proximal tip end (18) relative to the first direction by between 10 to 50 % of the tip length.
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公开(公告)号：US20170296261A1
公开(公告)日：2017-10-19
申请号：US15485759
申请日：2017-04-12
CPC分类号： A61B18/1492 , A61B18/14 , A61B2018/00404 , A61B2018/00577 , A61B2018/00589 , A61B2018/00791 , A61B2018/126 , A61B2018/1475
摘要： The present disclosure provides for a device and methods of use to endoluminally ablate and/or occlude a body vessel using a radiofrequency (“RF”) signal. The device has two conductive elements or electrodes that form an electrical circuit and are operable to create an electrical field. The electrical field ablates the body vessel, forming an occlusion.
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公开(公告)号：US20160278839A1
公开(公告)日：2016-09-29
申请号：US15079975
申请日：2016-03-24
IPC分类号： A61B18/08
摘要： RF ablation system includes a catheter having a lumen therein and a first electrode. Second electrode is disposed around the catheter proximate the distal end of the catheter and spaced from the first electrode by an insulating spacer which may be a part of the catheter or a sleeve on the first electrode. The first electrode is able to slide in and out of the catheter to vary the exposed length of the first electrode and as a result to alter the energy density at the first electrode in order to exhibit different heating effects. Control unit controls current through the electrodes and also the exposed length of the first electrode. The second electrode has a surface area at least twice that of the first electrode. Consequently, negligible heat is generated at the second electrode and therefore no blood clotting or other ablation material is formed over the catheter.
摘要翻译： RF消融系统包括其中具有内腔的导管和第一电极。 第二电极设置在靠近导管远端的导管周围，并通过绝缘间隔物与第一电极间隔开，绝缘隔离物可以是导管的一部分或第一电极上的套管。 第一电极能够滑入和导出导管以改变第一电极的暴露长度，并且因此改变第一电极处的能量密度以便表现出不同的加热效果。 控制单元控制通过电极的电流以及第一电极的暴露长度。 第二电极具有至少是第一电极的两倍的表面积。 因此，在第二电极处产生可忽略的热量，因此在导管上不形成血液凝固或其它消融材料。
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公开(公告)号：US20200268442A1
公开(公告)日：2020-08-27
申请号：US16721279
申请日：2019-12-19
IPC分类号： A61B18/14
摘要： An endoluminal energy delivery device includes a proximal end and a distal end, an electrically conductive core extending from the proximal to the distal end, and an energy delivery tip at the distal end. The energy delivery tip includes a distal core portion and an electrically conductive element disposed coaxially around the distal core portion and electrically coupled thereto in parallel. The distal core portion is made of a first material and the electrically conductive element is made of a second material. The second material has a higher conductivity than the first material. Electrical energy supplied to the delivery device passes simultaneously through the distal core portion and the electrically conductive element.
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公开(公告)号：US10682172B2
公开(公告)日：2020-06-16
申请号：US15379683
申请日：2016-12-15
IPC分类号： A61B18/04 , A61B18/10 , A61B18/08 , A61B17/12 , A61N1/36 , A61N1/39 , A61B18/00 , A61B17/00 , A61B18/14
摘要： The preferred embodiment provides apparatus for ablating a vessel by generating heat within a vessel to cause blood clotting to occlude the vessel. The apparatus includes an electrically resistive element at the distal end of the apparatus, the resistive element being uncoated and therefore in bare form. An alternating current supply feeds electrical current through the resistive element to cause heating of the element and surrounding blood or tissue. The alternating current power supply 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 reduces or eliminates corrosion of the resistive element in blood as the resistive element is heated. Use of conductive coatings for a sacrificial anode can be avoided.
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公开(公告)号：US20180333205A1
公开(公告)日：2018-11-22
申请号：US15983170
申请日：2018-05-18
发明人： Rune T. Paamand
CPC分类号： A61B18/18 , A61B2018/00404 , A61B2018/00577 , A61B2018/00797 , A61B2018/1807 , A61N2005/0602 , A61N2005/063 , A61N2005/066 , G01K11/3206 , G02B6/262 , G02B6/32
摘要： Optical energy delivery apparatus for ablation or embolization includes an optical fibre having a distal end which is provided a light directing element, such as a lens. The light directing element is configured to direct optical energy beyond the distal end of the optical fibre. The optical fibre includes at least one Bragg grating proximate the distal end for sensing a change in the optical fibre during its operation. The apparatus includes a control unit configured to drive an optical source and to obtain signals from a sensor unit. The controller may also drive the energy source at a sensing wavelength. The structure provides a single optical fibre supply optical energy and sense changes in optical fibre. The optical fibre may have a tapering diameter towards its distal tip for increased flexibility at its distal end.
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