Vacuum coagulation probes
View Patent ↗Methods for using a surgical device integrating a suction mechanism with a coagulation mechanism for improving lesion creation capabilities. The device comprises an elongate member having an insulative covering attached about means for coagulating soft tissue. Openings through the covering expose regions of the coagulation-causing elements and are coupled to lumens in the elongate member which are routed to a vacuum source and a fluid source to passively transport fluid along the contacted soft tissue surface in order to push the maximum temperature deeper into tissue.
1. A method of confirming engagement between an electrode in a treatment device and a surface of soft tissue prior to treating the tissue, the method comprising:
advancing a portion of the treatment device housing the electrode to the surface, where the treatment device comprises an opening exposing the electrode, the treatment device also comprising a vacuum lumen coupled to a vacuum source and a fluid perfusion lumen coupled to a fluid source, where both the vacuum lumen and fluid perfusion lumen are fluidly coupled to the opening;
drawing a vacuum in the vacuum source to reduce pressure in both the vacuum lumen and the opening, whereupon placing the opening against tissue causes tissue to enter the opening creating a seal against the soft tissue, where formation of the seal causes the fluid perfusion lumen to reduce in pressure causing fluid flow from the fluid source through the fluid perfusion lumen across the opening, and through the vacuum lumen, where breaking of the seal prevents the perfusion lumen from dropping in pressure and prevents fluid flow; and
observing the fluid flow to confirm engagement between the electrode and the soft tissue.
2. The method of claim 1 , where advancing the treatment device to the surface the soft tissue comprises advancing the treatment device to a liver, prostate, colon, esophagus, gastrointestinal region, and gynecological region.
3. The method of claim 1 , where advancing the treatment device to the surface of the soft tissue comprises advancing the treatment device during a procedure selected from the group consisting of an arthroscopic, laparoscopic, and other minimally invasive procedure.
4. The method of claim 1 , further comprising energizing the electrode after observing the fluid flow to create a coagulation lesion in the soft tissue.
5. The method of claim 4 , where energizing the electrode during the fluid flow to create the lesion in the surface of soft tissue comprises applying vibrational energy to the electrode to create a contiguous transmural lesion in atrial tissue.
6. The method of claim 4 , where energizing the electrode during the fluid flow to create the lesion in the surface of soft tissue comprises applying RF energy to the electrode to create a contiguous transmural lesion in atrial tissue.
7. The method of claim 6 , where creating the contiguous transmural lesion comprises creating a series of contiguous transmural lesions.
8. The method of claim 6 , where advancing the treatment device to the surface of soft tissue comprises advancing the treatment device to a plurality of regions to create a pattern of lesions in atrial tissue.
9. The method of claim 6 , where the RF energy comprises a unipolar mode, and further comprising placing a reference element in electrical contact with tissue.
10. The method of claim 6 , where the RF energy comprises a bipolar mode.
11. The method of claim 1 , where the electrode has a length and conforms to the surface of soft tissue to create a curvilinear lesion.
12. The method of claim 1 , where the portion of the treatment device housing, the electrode is pre-shapeable to assume a shape and where the lesion forms the shape.
13. The method of claim 1 , further comprising advancing a track adjacent to the surface and where advancing the treatment device to the surface comprises advancing the treatment device over the track.
14. The method of claim 13 , where the track comprises a device selected from the group consisting of a wire, a steerable catheter, a steerable guide-wire, a shaped tube, and a shaped mandrel.