Tissue management methods, apparatus, and systems
Tissue management methods can include inserting a clamping device into a vessel and clamping a vessel wall via the clamping device. Tissue can be dilated about the clamping device and an anastomotic device provided to the vessel.
1. A method of managing tissue for creation of an anastomosis, the method comprising:
inserting an anvil and a clamp foot through a wall of the vessel while the anvil and the clamp foot are in an approximated state, wherein a clamp assembly comprises the anvil and the clamp, and wherein the clamp foot defines a diameter;
separating the anvil and the clamp foot to an open state after the anvil and the clamp foot have been inserted through the wall of the vessel to create or expand a gap between the anvil and the clamp foot, wherein the anvil and the clamp foot are closer to each other when in the approximated state than they are when in the open state, and wherein a diameter of the clamp assembly within the gap is smaller than the diameter of the clamp foot;
removing the clamp foot from the vessel after the anvil and the clamp foot have been moved from the approximated state to the open state;
permitting the vessel wall to resiliently close around at least a portion of the clamp assembly that is within the gap upon removal of the clamp foot from the vessel; and
approximating the anvil and the clamp foot to each other after the vessel wall has resiliently closed around the at least a portion of the clamp assembly to hold the vessel wall between the anvil and the clamp foot.
2. The method of claim 1 , wherein the clamp assembly further comprises one or more teeth, and wherein separating the anvil and the clamp provides access to sharpened ends of the one or more teeth.
3. The method of claim 2 , wherein the one or more teeth project proximally relative to the anvil, the method further comprising pulling the anvil pull tube to capture the vessel wall on the one or more teeth prior to approximating the anvil and the clamp foot.
4. The method of claim 1 , wherein the clamp assembly comprises a clamp tube connected to the clamp foot, and wherein the method further comprises withdrawing from the vessel via the clamp tube to verify that the clamp foot is within the vessel.
5. The method of claim 1 , further comprising dilating tissue that surrounds the clamp assembly so as to define an expanded tract.
6. The method of claim 5 , further comprising advancing an adapter over the clamp assembly through the expanded tract until the adapter is adjacent the vessel.
7. A method of managing tissue for creation of an anastomosis, the method comprising:
inserting through a wall of a vessel an anvil and a clamp foot of an assembly that comprises the anvil, the clamp foot, and one or more teeth;
separating the anvil and the clamp foot from each other after insertion of the anvil and the clamp foot through the wall of the vessel to create or expand a gap between the anvil and the clamp foot;
providing access to the one or more teeth;
moving the clamp assembly proximally to capture the wall of the vessel via the one or more teeth after separation of the anvil and the clamp foot from each other and after access to the one or more teeth has been provided; and
approximating the anvil and the clamp foot to each other to clamp the vessel wall between the anvil and the clamp foot after capture of the wall of the vessel via the one or more teeth.
8. The method of claim 7 , wherein providing access to the one or more teeth comprises moving at least a portion of the one or more teeth radially outwardly.
9. The method of claim 7 , wherein said separating the anvil and the clamp foot and said providing access to the one or more teeth occurs simultaneously.
10. The method of claim 7 , wherein the anvil is connected to an anvil pull tube and the clamp foot is connected to a clamp tube, and wherein at least a portion of the anvil pull tube is within the clamp tube.
11. The method of claim 7 , wherein said inserting the anvil and the clamp foot through a wall of the vessel comprises advancing the clamp assembly over a guidewire.
12. The method of claim 7 , wherein said separating the anvil and the clamp foot comprises moving the anvil distally relative to the clamp foot.
13. The method of claim 7 , further comprising sensing the capture of the wall of the vessel due to an increased resistance to proximal movement of the clamp assembly.