Irrigated ablation device assembly
First Claim
1. A tissue ablation device assembly for ablating a region of tissue in a body of a patient, comprising:
- an elongated body having a proximal end portion and a distal end portion;
a tubular porous membrane located along said distal end portion, said porous membrane having a substantially non-compressible porous wall with an inner surface that defines an inner space;
an ablation element disposed within said inner space of said porous membrane, said ablation element having a fixed position with respect to said porous membrane; and
a fluid passageway extending through said elongated body and communicating with said inner space, said fluid passageway being adapted to be fluidly coupled to a pressurizeable fluid source for delivering a volume of pressurized fluid from said fluid source to said inner space;
wherein said porous membrane allows at least a substantial portion of said volume of pressurized fluid to pass through said porous wall for ablatively coupling said ablation element to said region of tissue.
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Accused Products
Abstract
A tissue ablation device assembly ablates a region of tissue of a body space wall of a patient. In a tissue ablation device assembly, an ablation member is disposed on the distal end portion of an elongated body. The ablation member includes an ablation element and at least one conductor coupled to the ablation element. A porous membrane covers the ablation element and defines an inner space between the ablation element and an inner surface of the porous membrane. A pressurizable fluid passageway extends between a fluid port on the proximal end portion of the elongated body and the inner space within the porous membrane. Fluid can pass from the fluid port, through the pressurizable fluid passageway, to the inner space. The porous membrane allows a volume of pressurized fluid to pass through the porous membrane to an exterior of the ablation member so as to irrigate the ablation element.
386 Citations
28 Claims
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1. A tissue ablation device assembly for ablating a region of tissue in a body of a patient, comprising:
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an elongated body having a proximal end portion and a distal end portion;
a tubular porous membrane located along said distal end portion, said porous membrane having a substantially non-compressible porous wall with an inner surface that defines an inner space;
an ablation element disposed within said inner space of said porous membrane, said ablation element having a fixed position with respect to said porous membrane; and
a fluid passageway extending through said elongated body and communicating with said inner space, said fluid passageway being adapted to be fluidly coupled to a pressurizeable fluid source for delivering a volume of pressurized fluid from said fluid source to said inner space;
wherein said porous membrane allows at least a substantial portion of said volume of pressurized fluid to pass through said porous wall for ablatively coupling said ablation element to said region of tissue. - 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, 27)
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28. A tissue ablation device assembly for ablating a region of tissue in a body of a patient, comprising:
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a flexible elongated body having a distal end portion and guidewire lumen for slidably receiving a guidewire;
a tubular porous membrane having a proximal end portion bonded to an outer surface of said distal end portion of said elongated body, said porous membrane having a substantially non-compressible porous wall with an inner surface;
an end cap attached to a distal end of said tubular porous membrane for providing a fluid tight seal in said inner space of said tubular porous membrane;
a plurality of wire coil electrodes disposed along a longitudinal axis within said inner space of said porous membrane, said electrodes having a fixed position with respect to said porous membrane;
a plurality of conductors coupled to said electrodes and extending through said elongated body for electrically connecting said electrodes to a current source;
an elongated fluid tube defining a fluid passageway, said elongated fluid tube extending through said elongated body and through an inner diameter of each of said electrodes, said fluid passageway including at least one port along a distal end portion for fluid communication with said inner space, said fluid passageway being adapted for delivering a pressurized fluid from a fluid source to said inner space; and
a plurality of thermal sensors disposed along an outer surface of said porous membrane for monitoring a temperature at said region of tissue;
wherein said porous membrane allows at least a substantial portion of said pressurized fluid to permeate across said porous wall for ablatively coupling said electrodes to said region of tissue.
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Specification