Cryoprobe

1 . A cryogenic probe comprising:

a flexible elongated tube having a consistent longitudinal cross-section, the flexible elongated tube at least partially housing or delineating a high pressure fluid supply conduit and a fluid exhaust conduit, the flexible elongated tube operatively coupled to a distal ablation section terminating at a closed distal end, the flexible elongated tube houses a plurality of discrete stagnant fluid pockets at ambient pressure interposing an exterior of the flexible elongated tube and at least one of the high pressure fluid supply conduit and the fluid exhaust conduit; and

a handle housing at least partially circumscribing at least a portion of a proximal end of the flexible elongated tube and receiving or delineating at least a portion of the high pressure fluid supply conduit and a portion of the fluid exhaust conduit;

wherein at least a portion of the flexible elongated tube interposes the handle housing and the distal ablation section and is adjacent the distal ablation section;

wherein the plurality of discrete stagnant fluid pockets is at least partially delineated by an insert that also provides a passageway for at least one of the high pressure fluid supply conduit and the fluid exhaust conduit;

wherein the insert includes a triangular cross-section and includes separate passageways for the high pressure fluid supply conduit and the fluid exhaust conduit.

2 . The cryogenic probe of claim 1 , wherein the plurality of discrete stagnant fluid pockets is at least partially delineated by a spacer helix.

3 . The cryogenic probe of claim 2 , wherein the spacer helix comprises a plurality of spacer helices.

4 . The cryogenic probe of claim 3 , wherein the plurality of spacer helices are longitudinally offset from one another along a length of the conduit.

5 . The cryogenic probe of claim 2 , wherein the spacer helix comprises an insulative material.

6 . The cryogenic probe of claim 1 , wherein the separate passageways for the high pressure fluid supply conduit and the fluid exhaust conduit includes at least one of a plurality of fluid supply conduits and a plurality of fluid exhaust conduits.

7 . A cryogenic probe comprising:

a flexible elongated tube having a consistent longitudinal cross-section, the flexible elongated tube at least partially housing or delineating a high pressure fluid supply conduit and a fluid exhaust conduit, the flexible elongated tube operatively coupled to a distal ablation section terminating at a closed distal end, the flexible elongated tube houses a plurality of discrete stagnant fluid pockets at ambient pressure interposing an exterior of the flexible elongated tube and at least one of the high pressure fluid supply conduit and the fluid exhaust conduit; and

a handle housing at least partially circumscribing at least a portion of a proximal end of the flexible elongated tube and receiving or delineating at least a portion of the high pressure fluid supply conduit and a portion of the fluid exhaust conduit;

wherein at least a portion of the flexible elongated tube interposes the handle housing and the distal ablation section and is adjacent the distal ablation section;

wherein the plurality of discrete stagnant fluid pockets is at least partially delineated by an insert that also provides a passageway for at least one of the high pressure fluid supply conduit and the fluid exhaust conduit; and, wherein the insert includes a geometric shaped cross-section and includes separate conduits for the high pressure fluid supply conduit and the fluid exhaust conduit, the geometric shaped cross-section having four or more sides.

8 . The cryogenic probe of claim 7 , wherein the separate conduits for the high pressure fluid supply conduit and the fluid exhaust conduit include at least one of a plurality of fluid supply conduits and a plurality of fluid exhaust conduits.

9 . A cryogenic probe comprising:

a flexible elongated tube at least partially housing an insulating insert that includes a plurality of through channels, where at least a first of the plurality of through channels is configured to convey an exhaust fluid and at least a second and a third of the plurality of through channels is configured to convey a high pressure supply fluid, where the second and third of the plurality of through channels are distributed equidistantly about the first of the plurality of through channels, the insulating insert including a plurality of longitudinal ridges contacting an interior of the flexible elongated tube, where the insulating insert and the flexible elongated tube cooperatively delineate a plurality of stagnant fluid pockets; and

a handle housing through which extends a high pressure fluid supply conduit and an exhaust conduit, the high pressure fluid supply conduit in fluid communication with the second and third of the plurality of through channels, the exhaust conduit in fluid communication with the first of the plurality of through channels;

wherein at least a portion of the flexible elongated tube interposes the handle housing and a distal ablation section of the cryogenic probe.