Ablation of rectal and other internal body structures
First Claim
1. A method for ablating a structure within a body, said method including the steps of:
- inserting a catheter into region of said body;
isolating said region from gas or fluid from outside said region using at least one balloon having a microporous membrane;
advancing an electrode linearly into said structure through the movement of a rotatable element which translates rotational movement from a control element into a linear movement of said electrode; and
emitting, from said electrode into said region, an effective amount of energy to ablate said structure.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention provides an apparatus and system for ablation of body structures or tissue in the region of the rectum. A catheter is inserted into the rectum, and an electrode is disposed thereon for emitting energy. The environment for an ablation region is isolated or otherwise controlled by blocking gas or fluid using a pair of inflatable balloons at upstream and downstream locations. Inflatable balloons also serve to anchor the catheter in place. A plurality of electrodes are disposed on the catheter and at least one such electrode is selected and advanced out of the catheter to penetrate and ablate selected tissue inside the body in the region of the rectum. The electrodes are coupled to sensors to determine control parameters of the body structure or tissue, and which are used by feedback technique to control delivery of energy for ablation or fluids for cooling or hydration. The catheter includes an optical path disposed for coupling to an external view piece, so as to allow medical personnel to view or control positioning of the catheter and operation of the electrodes. The catheter is disposed to deliver flowable substances for aiding in ablation, or for aiding in repair of tissue, such as collagen or another substance for covering lesions or for filling fissures. The flowable substances are delivered using at least one lumen in the catheter, either from at least one hole in the catheter, from an area of the catheter covered by a microporous membrane, or from microporous balloons.
370 Citations
52 Claims
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1. A method for ablating a structure within a body, said method including the steps of:
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inserting a catheter into region of said body; isolating said region from gas or fluid from outside said region using at least one balloon having a microporous membrane; advancing an electrode linearly into said structure through the movement of a rotatable element which translates rotational movement from a control element into a linear movement of said electrode; and emitting, from said electrode into said region, an effective amount of energy to ablate said structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. Apparatus for ablating a structure in a region within a body, said apparatus including:
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a catheter disposed for positioning in said region; means for isolating said region from gas or fluid from outside said region using at least one balloon having a microprous membrane; an electrode coupled to said catheter; and a control element including a rotatable element which translates rotational movement from said control element into a linear movement of said electrode thereby advancing said electrode linearly into said structure. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification