Apparatus and method for occluding a vessel by RF embolization

a technology of appendix and occlusion, which is applied in the field of appendix and a method of occluding or closing a vessel by means of rf embolization, can solve problems such as the barrier of further vessel occlusion, and achieve the effect of closing off residual lumen

Inactive Publication Date: 2018-11-15
COOK MEDICAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach ensures effective and complete vessel occlusion with reduced risk of rupture or recanalization, suitable for both monopolar and bipolar systems, by using a dual power level strategy and partial retraction mechanism to secure the occluding barrier.

Problems solved by technology

Preferably, the second power level is insufficient to cause the creation of a further vessel occluding barrier, that is a second barrier which closes off the vessel in its entirety.

Method used

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  • Apparatus and method for occluding a vessel by RF embolization
  • Apparatus and method for occluding a vessel by RF embolization
  • Apparatus and method for occluding a vessel by RF embolization

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Embodiment Construction

[0038]There are described below various embodiments of apparatus and methods for effecting RF ablation of a body vessel, in particular a blood vessel. The preferred embodiments are designed to create blood clotting, that is to ablate the blood surrounding the electrical element. This can be achieved by selecting an ablation energy level and an ablation time duration suitable to heat surrounding blood, which in some circumstances can be expected to be less than the energy required to ablate the vessel tunica, although there may be experienced some contraction of the vessel as a result of the heating of the blood. The skilled person will be able to determine suitable ablation parameters from common general knowledge in the art. Moreover, the preferred embodiment uses a thin, that is narrow diameter, electrode which minimises the surface area contact with the vessel wall in circumstances where the distal end of the electrode is not deployed in the centre of the vessel.

[0039]It is to be...

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Abstract

An RF ablation system includes an electrode element of elongate form and a cathode pad. A control unit includes a processing unit, a power unit and, optionally, a temperature sensor and / or an impedance sensor. The control unit in one embodiment carries out RF ablation in at least two phases, the first phase at a higher energy level and a second phase, after at least partial retraction of the anode element, at a second lower phase in order to close any remaining lumen within a blood clot formed within the vessel during the first phase. Other embodiments provide for sensing retraction of the anode terminal and effecting RF ablation during and / or after the retraction process in order to create a more effective occlusion barrier.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation application of U.S. patent application Ser. No. 14 / 681,644, filed Apr. 8, 2015, which claims the benefit of priority under 35 U.S.C. § 119(a) to Great Britain Patent Application No. 1406496.8, filed Apr. 10, 2014, the entire contents of which is incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to apparatus and a method for occluding or closing a vessel by means of RF embolization.BACKGROUND ART[0003]There are numerous medical conditions when it is desired or necessary to close a body vessel, including for instance in the treatment of aneurysms, arteriovenous malformations, arteriovenous fistulas, for starving organs of oxygen and nutrients for instance in the treatment or containment of cancerous growths, and so on.[0004]Several techniques are known and in use for closing or occluding such body vessels. Traditionally, vessels have been closed by means of external ligati...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A61B18/14A61B18/12A61B17/00A61B18/00
CPCA61B2017/00075A61B2018/00875A61B2018/00791A61B2018/00702A61B2018/00666A61B2018/0063A61B18/1206A61B18/1492A61B2018/1467A61B2018/00416A61B2018/00589A61B2018/00654A61B2018/00898A61B2018/00404
InventorELGAARD, PERTORP, ALLAN
OwnerCOOK MEDICAL TECH LLC