Method for anastomosing alimentary tract

1. A method for anastomosing an alimentary tract, using an endoscope, and a tube body having a distal end part and a proximal end part, the distal end part being coupled to an outer periphery of a distal end part of the endoscope, and the proximal end part being provided with a treatment part that is configured to treat a tract wall of an alimentary tract, the method comprising:

a first step of inserting the endoscope into the alimentary tract through a natural opening in a state where the distal end part of the tube body is coupled to the outer periphery of the distal end part of the endoscope;

a second step of making a hole in the tract wall of the alimentary tract to allow an abdominal cavity and an inside of the alimentary tract to communicate with each other, the hole being formed in a first portion of the alimentary tract;

a third step of moving the distal end part of the endoscope to insert the tube body through the hole;

a fourth step of grasping the distal end part of the tube body disposed through the hole by grasping forceps percutaneously introduced into the abdominal cavity;

a fifth step of separating the tube body from the outer periphery of the distal end part of the endoscope by moving the distal end part of the endoscope in a direction away from the grasping forceps in a state where the distal end part of the tube body is grasped by the grasping forceps; and

a sixth step of delivering the treatment part up to the hole by pulling the tube body with the grasping forceps after the fifth step.

2. The method for anastomosing an alimentary tract according to claim 1 ,

wherein the second step includes:

lifting up an outer wall of the alimentary tract by pressing the distal end part of the tube body against an inner wall of the alimentary tract; and

specifying a position where the outer wall of the alimentary tract is lifted up, and forming the hole at the position where the outer wall is lifted up, with an incision tool percutaneously introduced into the abdominal cavity.

3. The method for anastomosing an alimentary tract according to claim 1 ,

wherein the treatment part includes an anvil head capable of receiving staple needles to be discharged from a stapler body, and an anvil shaft extending from the anvil head,

the method further comprising:

a step of inserting the anvil shaft through the hole after the sixth step;

a step of separating the tube body and the treatment part from each other in a state where the anvil shaft is inserted through the hole;

a step of inserting the stapler body into a separate portion of the alimentary tract; and

a step of anastomosing the first portion of the alimentary tract and the separate portion of the alimentary tract by discharging the staple needles from the stapler body to the anvil head in a state where the anvil shaft and the stapler body are coupled together within the separate portion of the alimentary tract after the tube body and the anvil shaft are separated from each other.

4. The method for anastomosing an alimentary tract according to claim 1 ,

wherein the treatment part includes an anvil head capable of receiving staple needles discharged from a stapler body, and an anvil shaft extending from the anvil head, and

wherein the sixth step includes pulling the tube body by the grasping forceps, which grasps the tube body, until the anvil head abuts against an inner surface of the tract wall of the alimentary tract around the hole.