Methods and systems for in situ tissue marking and orientation stabilization
View Patent ↗A method of marking an orientation of a cut specimen of tissue prior to excision thereof from a body includes steps of disposing a tissue-marking probe in the body adjacent the cut specimen, the tissue-marking probe including a tissue-marking tool configured to selectively mark the cut specimen. A surface of the cut specimen is then marked with the tissue-marking tool such that the orientation of the cut specimen within the body is discernable after the cut specimen is excised from the body. The tissue-marking tool may be configured to selectively bow out of and back into a window defined near a distal tip of the probe and the marking step may include a step of selectively bowing the tissue-marking tool out of the window and following the surface of the cut specimen while rotating the probe. The tissue-marking tool may include an RF cutting tool and the marking step may include a step of coagulating or cauterizing a selected portion of the surface of the cut specimen with the RF cutting tool. Alternatively, the marking step may include a step of delivering dye onto selected portions of the surface of the cut specimen.
1. A method of marking an orientation of a cut specimen of tissue prior to excision thereof from a body, comprising the steps of:
disposing a tissue-marking probe in the body adjacent the cut specimen, the tissue-marking probe including a tissue-marking tool configured to selectively mark the cut specimen, the tissue-marking tool being configured to selectively bow out of and back into a window defined near a distal tip of the probe;
marking a surface of the cut specimen with the tissue-marking tool by selectively bowing the tissue-marking tool out of the window and following the surface of the cut specimen while rotating the probe, such that the orientation of the cut specimen within the body is discernable after the cut specimen is excised from the body.
2. The method of claim 1 , wherein the disposing step disposes the tissue-marking probe directly within the tissue.
3. The method of claim 1 , wherein the disposing step disposes the tissue-marking probe within a cannula disposed adjacent the cut specimen.
4. The method of claim 1 , wherein the tissue-marking tool includes an RF cutting tool and wherein the marking step includes a step of coagulating a portion of the surface of the cut specimen with the RF cutting tool.
5. The method of claim 4 , wherein the coagulating step includes a step of momentarily increasing an RF power delivered to the portion of the surface of the cut specimen by the RF cutting tool.
6. The method of claim 4 , wherein the coagulating step includes a step of momentarily maintaining the RF cutting tool substantially immobile on the portion of the surface of the specimen while an RF power delivered to the RF cutting tool is maintained constant.
7. The method of claim 1 , wherein the marking step includes a step of delivering dye onto the surface of the cut specimen.
8. The method of claim 7 , wherein the dye includes at least one of Methylene Blue, Congo Red and Lymphazurin® Blue.
9. The method of claim 7 , wherein the marking step includes delivering a first dye of a first color to a first portion of the surface of the cut specimen and delivering a second dye of a second color to a second portion of the surface of the cut specimen.
10. The method of claim 9 , wherein the first portion includes one of a proximal and a distal end of the cut specimen.
11. The method of claim 7 , wherein the dye delivering step delivers the dye at a selectable graduated rate to the surface of the specimen, whereby the dye is delivered darker to a first portion of the surface of the specimen and is delivered relatively lighter to a second portion of the surface of the specimen.