Method for suturing a gastric wall

1. A method for cerclaging suturing a gastric wall comprising:

inserting a flexible elongated loop-forming member perorally into a stomach and advancing the loop-forming member such that the loop-forming member protrudes from a distal end portion of an overtube and advances along a lesser curvature line of the stomach toward a pyloric antrum of the stomach, wherein the loop-forming member is inserted through the overtube and the distal end portion of the overtube is located at a predetermined position near a cardia of the stomach;

advancing the loop-forming member to contact with the gastric wall in vicinity of the pyloric antrum of the stomach, and then advancing the loop-forming member along a greater curvature line of the stomach such that the loop-forming member returns to the predetermined position and connects to the distal end portion of the overtube to form a closed loop in the stomach;

suctioning air from the stomach after forming the closed loop member in the stomach such that an anterior gastric wall is in proximity with a posterior gastric wall within a region encircled by the closed loop; and

suturing at least a portion of the anterior gastric wall to the posterior gastric wall that are in proximity in the region encircled by the closed loop.

2. The method for suturing the gastric wall according to claim 1 , wherein a suture thread is punctured alternately through the anterior wall and the posterior wall while rotating a bent needle when the anterior gastric wall and the posterior gastric wall are sutured.

3. The method for suturing the gastric wall according to claim 2 , further comprising:

measuring thicknesses of a mucosa and a muscle coat of the gastric wall that should be sutured before or after inserting an instrument that sutures the anterior gastric wall and the posterior gastric wall;

selecting the instrument suitable for the measured thicknesses of the mucosa and the muscle coat, and suturing the mucosa of the gastric wall by using the instrument.

4. The method for suturing the gastric wall according to claim 3 , wherein the thicknesses of the mucosa and the muscle coat of the gastric wall are measured by using an ultrasonic endoscope or an ultrasonic searcher attached to the instrument.

5. The method for suturing the gastric wall according to claim 2 , further comprising:

measuring thicknesses of a mucosa and a muscle coat of the gastric wall that should be sutured before or after inserting an instrument that sutures the anterior gastric wall and the posterior gastric wall; and

adjusting the instrument based on the measured thicknesses of the mucosa and the muscle coat, and suturing the mucosa of the stomach by using the instrument.

6. The method for suturing the gastric wall according to claim 5 , wherein the thicknesses of the mucosa and the muscle coat of the gastric wall are measured by using an ultrasonic endoscope or an ultrasonic searcher attached to the instrument.

7. The method for suturing the gastric wall according to claim 1 , including dissecting mucosa of tissues of the gastric wall before suturing the anterior gastric wall and the posterior gastric wall.

8. The method for suturing the gastric wall according to claim 1 , including embedding an implant into a sleeve portion of the stomach, wherein the sleeve portion of the stomach is formed by the suturing.

9. The method for suturing the gastric wall according to claim 8 , wherein a position for embedding the implant is at an entrance of the sleeve portion of the stomach in vicinity of the cardia of the stomach; at an exit of the sleeve portion of the stomach in vicinity of a pylorus of the stomach; or at least a part of the sleeve portion of the stomach.

10. The method for suturing the gastric wall according to claim 8 , wherein the implant is a metal or resin coil, or a suture thread.