Intracardiac tools and methods for delivery of electroporation therapies

Abstract

A medical device comprising an elongate body having a proximal portion, a distal portion, a distal end, a longitudinal axis, and a radius, a plurality of deployable arms, the deployable arms being movably coupled to the elongate body, and at least one arm from the plurality of deployable arms having at least one electrically conductive surface. The plurality of deployable arms being movable from a collapsed configuration to an expanded configuration. In the collapsed configuration, the plurality of deployable arms are approximately parallel to the longitudinal axis. In the expanded configuration, the at least one electrically conductive surface is distal facing and is positioned radially from the longitudinal axis by a distance that is greater than the radius of the elongate body.

What is claimed is: 
     
         1 . A medical device comprising:
 an elongate body having a proximal portion, a distal portion, a distal end, a longitudinal axis, and a radius;   a plurality of deployable arms, the deployable arms being movably coupled to the elongate body; and   at least one arm from the plurality of deployable arms having at least one electrically conductive surface, the plurality of deployable arms being movable from a collapsed configuration to an expanded configuration, wherein in the collapsed configuration the plurality of deployable arms are approximately parallel to the longitudinal axis, and wherein in the expanded configuration the at least one electrically conductive surface is distal facing and is positioned radially from the longitudinal axis by a distance that is greater than the radius of the elongate body.   
     
     
         2 . The medical device of  claim 1 , wherein the plurality of deployable arms comprises five deployable arms. 
     
     
         3 . The medical device of  claim 1 , further comprising a shaft, the shaft being at least partially disposed within a portion of the elongate body, the shaft being slidably and rotatably moveable with respect to the elongate body. 
     
     
         4 . The medical device of  claim 3 , wherein the shaft has a circumference, the plurality of deployable arms being disposed around the circumference of the shaft. 
     
     
         5 . The medical device of  claim 3 , wherein the elongate body has a distal end and the shaft is extendable from the distal end of the elongate body. 
     
     
         6 . The medical device of  claim 3 , wherein the shaft defines a lumen therein. 
     
     
         7 . The medical device of  claim 6 , further comprising a treatment device, the lumen being sized to receive the treatment device. 
     
     
         8 . The medical device of  claim 7 , wherein the treatment device has at least one electrically conductive surface. 
     
     
         9 . The medical device of  claim 7 , wherein the treatment device is a guidewire. 
     
     
         10 . The medical device of  claim 9 , wherein at least a portion of the guidewire is configured to extend distally from the distal portion of the elongate body. 
     
     
         11 . The medical device of  claim 1 , wherein the at least one electrically conductive surface comprises a plurality of electrically conductive surfaces, and wherein each deployable arm of the plurality of deployable arms has at least one electrically conductive surface of the plurality of electrically conductive surfaces. 
     
     
         12 . The medical device of  claim 1 , wherein each deployable arm has a proximal portion and a distal portion, the proximal portion of each deployable arm being coupled with the elongate body. 
     
     
         13 . The medical device of  claim 12 , wherein the at least one electrically conductive surface is disposed on the distal portion of each deployable arm. 
     
     
         14 . The medical device of  claim 1 , wherein the at least one electrically conductive surface is an electrode. 
     
     
         15 . The medical device of  claim 1 , wherein the plurality of deployable arms are secured to the elongate body with a pivoting mechanism, the pivoting mechanism being configured to move the deployable arms from the expanded configuration to the collapsed configuration. 
     
     
         16 . The medical device of  claim 15 , wherein the pivoting mechanism is a hinge. 
     
     
         17 . A medical device comprising:
 an elongate body having a proximal portion, a distal portion, a longitudinal axis, and a radius;   five deployable arms, each deployable arm being movably coupled to the elongate body; and   each deployable arm having a plurality of electrically conductive surfaces, the five deployable arms being movable from an expanded configuration to a collapsed configuration, in the expanded configuration the plurality of electrically conductive surfaces are positioned in a plane that is substantially orthogonal to the longitudinal axis of the elongate body and in the collapsed configuration the five deployable arms are parallel to the longitudinal axis and the plurality of electrically conductive surfaces are positioned radially around the longitudinal axis by a distance that is greater than the radius of the elongate body.   
     
     
         18 . The medical device of  claim 17 , further comprising a shaft, the shaft being at least partially disposed within a portion of the elongate body, the shaft being slidably and rotatably moveable with respect to the elongate body. 
     
     
         19 . The medical device of  claim 18 , wherein each deployable arm has a proximal portion and a distal portion, the proximal portion of each deployable arm being coupled with the elongate body and the plurality of electrically conductive surfaces are disposed on the distal portion of each deployable arm. 
     
     
         20 . A method of treating tissue comprising:
 providing a medical device, the medical device having an elongate body and an electrically conductive surface on an actuating element;   positioning the medical device during treatment so that the electrically conductive surface on the actuating element faces distally away from the elongate body; and   retracting the medical device so that the electrically conductive surface is colinear with the elongate body.