Multifunctional ablation device

1. A medical device, comprising:

an elongate catheter body;

an inflatable first treatment region on the elongate catheter body having a first expandable element and a second expandable element, the first expandable element being contained within the second expandable element, the first treatment region being configured to cryoablate tissue;

a non-expandable second treatment region distal to the first treatment region, the second treatment region being configured to deliver radiofrequency energy to ablate tissue and defining a distal tip of the medical device; and

a non-expandable third treatment region located proximal to the first treatment region and being a proximal most treatment region, the third treatment region being configured to cryoablate tissue and being disposed between two adjacent catheter body segments.

2. The medical device of claim 1 , wherein the first expandable element and the second expandable elements are balloons.

3. The medical device of claim 2 , wherein the second treatment region includes a thermally conductive tip.

4. The medical device of claim 1 , wherein the second treatment region is configured to be in communication with a source of radiofrequency energy.

5. The medical device of claim 1 , wherein each of the first treatment region, second treatment region, and third treatment region is operable independently from the other two treatment regions.

6. The medical device of claim 5 , further comprising a first fluid flow path in fluid communication with the first treatment region, and a second fluid flow path in fluid communication with the third treatment region.

7. The medical device of claim 6 , wherein the first fluid flow path is fluidly isolated from the second fluid flow path.

8. The medical device of claim 1 , further comprising a radiopaque marker positioned at a boundary between the third treatment region and one of the adjacent catheter body segments.

9. An ablation system, the system comprising:

a radiofrequency energy source; and

an intravascular catheter including:

a handle;

a flexible elongate body including a proximal portion coupled to the handle and a distal portion;

an inflatable cryogenic treatment region coupled to the distal portion of the flexible elongate body having a first expandable element and a second expandable element, the first expandable element being contained within the second expandable element;

a non-expandable thermal segment located distal to the expandable cryogenic treatment region, wherein the non-expandable thermal segment is in communication with the radiofrequency energy source; and

a non-expandable cryogenic treatment region located proximal to the expandable cryogenic treatment region and being disposed between two adjacent catheter body segments.

10. The system of claim 9 , wherein the non-expandable thermal segment is operable independently from the inflatable cryogenic treatment region and the non-expandable cryogenic treatment region.

11. The system of claim 9 , further comprising a first fluid flow path in fluid communication with the inflatable cryogenic treatment region and a second fluid flow path in fluid communication with the non-expandable cryogenic treatment region.

12. The system of claim 9 , wherein the radiofrequency energy source is located within an electrocardiograph box.

13. The system of claim 11 , further comprising a cryogenic fluid source in fluid communication with each of the first fluid flow path and the second fluid flow path.

14. The system of claim 9 , wherein the non-expandable cryogenic treatment region is positioned between two adjacent portions of the flexible elongate body, the adjacent portions having a rigidity greater than a rigidity of the non-expandable cryogenic treatment region.