Patent ID: 8545394

Claim:
A selective cannulation method for a luminal tissue's branch section, the method comprising: a first step of guiding an endoscope having a forceps channel to an aperture section of the luminal tissue which has the branch section for a bile duct and a pancreatic duct; a second step of inserting a distal end of an endoscopic treatment instrument through the forceps channel into a common channel via the aperture section; a third step of positioning an actively bendable distal section of the endoscope treatment instrument between the aperture section and the branch section; a fourth step of bending the distal end of the endoscopic treatment instrument toward the bile duct in the common channel so that a proximal end of the actively bendable distal section of the endoscope treatment instrument is placed in the common channel, and making contact therewith of the bile duct side of the common channel before the distal end of the endoscopic treatment instrument reaches the branch section; a fifth step of sliding and moving the distal end of the endoscopic treatment instrument to the branch section while maintaining the actively bendable distal section of the endoscopic treatment instrument in a bending state and a contacting state with the bile duct side of the common channel; and a sixth step of inserting the distal end of the endoscopic treatment instrument under the bending state into the bile duct divided from the branch section.