Vacuum coagulation probes
View Patent ↗An embodiment of the invention includes a surgical device for coagulating soft tissue such as atrial tissue in the treatment of atrial fibrillation, atrial flutter, and atrial tachycardia; tendon or ligament shrinkage; or articular cartilage removal. The surgical device integrates a suction mechanism with the coagulation mechanism improving the lesion creation capabilities of the device. The surgical device comprises an elongate member having an insulative covering attached about conductive elements capable of coagulating soft tissue when radiofrequency or direct current energy is transmitted to the conductive elements. Openings through the insulative covering expose regions of the conductive elements and are coupled to lumens in the elongate member which are routed to a vacuum source. Suction causes the soft tissue to actively engage the opening thus the integrated, exposed conductive elements to facilitate the coagulation process and ensure the lesions created are consistent, continuous, and transmural. The embodiments of the invention can also incorporate cooling mechanisms associated with the conductive elements and coupled to a fluid source to passively transport fluid along the contacted soft tissue surface to cool thus pushing the maximum temperature deeper into tissue.
1. A surgical device for coagulating soft tissue, the device comprising:
a first elongate member comprising a tubular structure with a side wall defining a first lumen, a second lumen, and at least one attached conductive element;
at least one opening through said side wall exposing said at least one attached conductive element; said at least one opening being coupled to said first lumen and where a portion of the side wall comprises a sealing member adjacent to the at least one opening that is adapted to deform to sealingly engage a soft tissue surface;
a vacuum source coupled to said first lumen and in fluid communication with the at least one opening to allow a suction to be drawn through the at least one opening;
a fluid source coupled to said second lumen;
at least one electrical conduit coupled to said at least one attached conductive element;
an energy transmission source connected to said electrical conduit;
wherein said first lumen is coupled to said second lumen.
2. The device of claim 1 , where a portion of the first elongate member containing the at least one attached conductive element and the at least one attached conductive element are deformable.
3. The device of claim 2 , where the portion of the first elongate member containing the at least one attached conductive element and the at least one attached conductive element are elastic.
4. The device of claim 2 , where the portion of the first elongate member containing the at least one attached conductive element and the at least one attached conductive element are malleable.
5. The device of claim 1 , wherein said vacuum source causes fluid to flow from said first lumen to said second lumen cooling said soft tissue surface along said at least one opening as energy is simultaneously transmitted to said at least one attached conductive element causing said soft tissue to heat.
6. The device of claim 1 , wherein said fluid source comprises a therapeutic, pharmacologic solution.
7. The device of claim 1 , wherein said fluid source comprises a tissue cross-linking agent such as gludaraldehyde.