Methods and apparatus for tissue cryotherapy

a tissue cryotherapy and tissue technology, applied in the field of therapeutic cooling of body tissue, can solve the problems of untoward healing response, collagen build-up, and possible cause of atrial fibrillation

Inactive Publication Date: 2006-03-30
BOSTON SCI SCIMED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, atrial fibrillation may be caused by abnormal activity within one or more isolated focal centers within the heart.
The use of RF energy for ablation may, however, lead to untoward healing responses such as collagen build up at the area of interest after treatment.
In some cases, RF ablation may create lesions that cause occlusion of the coronary sinus in post procedure healing.
However, creating lesions in a heart using cryotherapy poses a challenge in that it may be difficult to deliver sufficient cooling to create a transmural (i.e., a through thickness) lesion.
In addition, blood delivered to and from the heart constantly provides heat to a target site at the heart, thereby counteracting against the cooling being delivered by the cryotherapy, and limiting the amount of cooling that can be delivered to the target site.

Method used

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  • Methods and apparatus for tissue cryotherapy
  • Methods and apparatus for tissue cryotherapy
  • Methods and apparatus for tissue cryotherapy

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Embodiment Construction

[0008] In accordance with some embodiments, a method for performing cryotherapy on a target tissue region in a body includes positioning a first cooling element in a first location in a body adjacent a target tissue region, positioning a second cooling element in a second location in the body adjacent the target tissue region, and cooling the respective first and second cooling elements so as to cool the target tissue region.

[0009] In accordance with other embodiments, a method for treating atrial fibrillation includes positioning a first cooling element in a patient's coronary sinus adjacent a target tissue region at least partially connecting the patient's left atrium and left ventricle, positioning a second cooling element in the patient's left atrium adjacent the target tissue region, and cooling the respective first and second cooling elements so as to ablate the target tissue region.

[0010] In accordance with other embodiments, an apparatus for performing cryotherapy on a tar...

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Abstract

A method for performing cryotherapy on a target tissue region in a body includes positioning a first cooling element in a first location in a body adjacent a target tissue region, positioning a second cooling element in a second location in the body adjacent the target tissue region, and cooling the respective first and second cooling elements so as to cool the target tissue region.

Description

FIELD OF THE INVENTION [0001] The present invention relates generally to therapeutic cooling of body tissue, and more particularly, to methods and apparatus for deploying a plurality of cooling elements to at least partially surround and cool, e.g., to ablate by cryoplasty, a selected tissue region. BACKGROUND OF THE INVENTION [0002] A number of medical conditions may be treated using ablative techniques or devices. Ablative therapy generally involves the killing of abnormal tissue at an area of interest, thereby resulting in an efficacious treatment for a medical condition. For example, atrial fibrillation may be treatable by ablation of the abnormal tissue within the left atrium and / or the pulmonary vein. [0003] Atrial fibrillation is a serious medical condition that is the result of abnormal electrical activity within the heart. This abnormal activity may occur at regions of the heart including the sino-atrial (SA) node, the atriovenricular (AV) node, or within other areas of car...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B18/02
CPCA61B18/02A61B19/54A61B2017/00101A61B2019/5454A61B2017/22051A61B2018/0022A61B2018/0212A61B2017/00243A61B90/39A61B2090/3954
Inventor LAFONTAINE, DANIEL M.AVITALL, BOAZ
Owner BOSTON SCI SCIMED INC
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