Surgical system and procedure for treatment of medically refractory atrial fibrillation
View Patent ↗The invention provides surgical systems and methods for ablating heart tissue within the interior and/or exterior of the heart. A plurality of probes is provided with each probe configured for introduction into the chest for engaging the heart. Each probe includes an elongated shaft having an elongated ablating surface of a predetermined shape. The elongated shaft and the elongated ablating surface of each probe are configured to ablate a portion of the heart. A sealing device affixed to the heart tissue forms a hemostatic seal between the probe and the penetration in the heart to inhibit blood loss therethrough.
1. A medical device for ablating tissue, the device comprising:
an elongate probe including a proximal end portion and a distal end portion at which the probe terminates, a cryogenic ablation surface disposed between the proximal end portion and the distal end portion closer to the distal end portion than the proximal end portion, and a malleable section overlapping at least a portion of the cryogenic ablation surface;
a flexible sheath, wherein the elongate probe is disposed at least partially within the flexible sheath such that moving the flexible sheath relative to the elongate probe adjusts an exposed length of the cryogenic ablation surface; and
a handle coupled to the proximal end portion of the elongate probe,
wherein the elongate probe can be selectively shaped to conform to a surface of cardiac tissue such that the cryogenic ablation surface can create a continuous lesion thereon.
2. The device according to claim 1 , wherein the probe is slidably disposed within the sheath.
3. The device according to claim 1 , wherein at least a portion of the cryogenic ablation surface overlaps a major portion of the malleable section.
4. A medical device for ablating tissue, the medical device comprising:
an elongate, linear probe including a proximal end portion, an intermediate portion, and a distal end portion;
a cryogenic ablation surface disposed upon the intermediate portion and proximate the distal end portion, and a malleable section between the proximal end portion and the distal end portion;
a flexible sheath, wherein the linear probe is disposed at least partially within the flexible sheath such that moving the flexible sheath relative to the linear probe adjusts an exposed length of the cryogenic ablation surface; and
a handle coupled to the proximal end portion of the linear probe,
wherein the linear probe is adapted to be selectively shaped to continuously conform to a surface of cardiac tissue and create a continuous lesion thereon.
5. A medical device for ablating tissue, the medical device comprising:
an elongate, linear probe body including a proximal end portion and a distal end portion;
a cryogenic ablation surface disposed between the proximal end portion and the distal end portion and disposed closer to the distal end portion than the proximal end portion, and a malleable section disposed between the proximal end portion and the distal end portion;
a flexible sheath, wherein the linear probe body is disposed at least partially within the flexible sheath such that moving the flexible sheath relative to the linear probe body adjusts an exposed length of the cryogenic ablation surface; and
a handle coupled to the proximal end portion of the linear probe body,
wherein the malleable section of the linear probe body can be selectively shaped via plastic deformation to continuously conform to a surface of cardiac tissue such that the ablation surface can create a continuous lesion thereon.