Chemical ablation therapy delivery system

1 . A chemical ablation therapy delivery system, comprising: a first expandable element; a second expandable element disposed about and circumferentially surrounding the first expandable element; a guide tube disposed between an outer surface of the first expandable element and an inner surface of the second expandable element, wherein the guide tube extends through the second expandable element and is attached to the second expandable element; and a needle movably disposed within the guide tube, including being movably disposed within a portion of the guide tube disposed between the first expandable element and the second expandable element.

2 . The system of claim 1 , wherein the guide tube is attached to the second expandable element such that at least part of the guide tube is always maintained in a fixed position relative to the second expandable element.

3 . The system of claim 1 , wherein the first expandable element or the second expandable element is selected from the group consisting of a balloon and a stent.

4 . The system of claim 1 , wherein the first expandable element and the second expandable element are each in the form of a balloon.

5 . The system of claim 1 , wherein the first expandable element or the second expandable element is in the form of an inflatable tube comprising a first end, a second end spaced from the first end, an outer sidewall that extends between the first end and the second end, and an inner sidewall that extends between the first end and the second end.

6 . The system of claim 1 , wherein the needle is movable relative to the guide tube between a delivery position and a deployed position, and wherein the needle is entirely retained within the guide tube when in the delivery position and extends beyond the guide tube when in the deployed position.

7 . The system of claim 1 , further comprising an ablation source interconnected with the needle, wherein the ablation source comprises at least one ablation agent.

8 . The system of claim 1 , further comprising a plurality of guide tubes and a corresponding plurality of needles, wherein the plurality of guide tubes includes the guide tube and the plurality of needles includes the needle.

9 . The system of claim 8 , wherein each guide tube of the plurality of guide tubes comprises an exit and the first expandable element or the second expandable element comprises a central axis that corresponds with a length dimension of the first expandable element or the second expandable element.

10 . The system of claim 9 , wherein the exit of at least some guide tubes of the plurality of guide tubes are disposed at different radial positions relative to and about the central axis of the first expandable element or the second expandable element, or wherein the exit of at least some guide tubes of the plurality of guide tubes are disposed at different positions along a length of the first expandable element or the second expandable element.

11 . A chemical ablation therapy delivery system, comprising: a first expandable element; a second expandable element disposed about and circumferentially surrounding the first expandable element; and a fluid delivery tube fixed to the second expandable element, wherein the fluid delivery tube is disposed between an outer surface of the first expandable element and an inner surface of the second expandable element, and wherein the fluid delivery tube extends through the second expandable element and is attached to the second expandable element; and an injector that is extendable from the fluid delivery tube, is at least fluidly connectable with an interior of the fluid delivery tube, and is capable of protruding beyond an outer perimeter of the second expandable element.

12 . A chemical ablation therapy delivery system, comprising: a guide tube comprising a first end, and a second end spaced from the first end, wherein the guide tube is disposed between an outer surface of a first expandable element and an inner surface of a second expandable element circumferentially surrounding the first expandable element, and wherein the guide tube extends through the second expandable element and is attached to the second expandable element; and an injector movably disposed within the guide tube, including being movably disposed within a portion of the guide tube disposed between the first expandable element and the second expandable element.