Radio frequency ablation cooling shield

a technology of radio frequency ablation and cooling shield, which is applied in the field of structure and use of ablation, can solve the problems of high likelihood of re-occurren
US20060271036A1Inactive Publication Date: 2006-11-30BOSTON SCI SCIMED INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
BOSTON SCI SCIMED INC
Publication Date
2006-11-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

A medical assembly and method are provided to effectively treat abnormal tissue, such as, a tumor. The target tissue is thermally ablated using a suitable source, such as RF or laser energy. A cooling shield is placed in contact with non-target tissue adjacent the target tissue, and actively cooled to conduct thermal energy away from the non-target tissue. In one method, the cooling shield can be placed between two organs, in which case, one of the two organs can comprise the target tissue, and the other of the two organs can comprise the non-target tissue. In this case, the cooling shield may comprise an actively cooled inflatable balloon, which can be disposed between the two organs when deflated, and then inflated. The inflatable balloon can be actively cooled by pumping a cooling medium through it. In another method, the cooling shield can be embedded within the non-target tissue. In this case, the cooling shield can comprise one or more needles. If a plurality of needles is used, they can be embedded into the non-target tissue in a series, e.g., a rectilinear or curvilinear arrangement. The needle(s) can be actively cooled by pumping a cooling medium through them.
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Description

FIELD OF THE INVENTION

[0001] The field of the invention generally relates to the structure and use of ablation to treat tissue abnormalities in a patient, and more particularly, to the use of radio frequency (RF) electrosurgical probes for the treatment of such tissue. BACKGROUND OF THE INVENTION

[0002] The delivery of radio frequency (RF) energy to target regions within tissue is known for a variety of purposes of particular interest to the present inventions. In one particular application, RF energy may be delivered to diseased regions (e.g., tumors) in tissue for the purpose of tissue necrosis. RF ablation of tumors is currently performed within one of two core technologies.

[0003] The first technology uses a single needle electrode, which when attached to a RF generator, emits RF energy from the exposed, uninsulated portion of the electrode. This energy translates into ion agitation, which is converted into heat and induces cellular death via coagulation necrosis. The second te...

Claims

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