Patent ID: 11911002
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A method comprising:
a first inserting step of inserting an endoscope into a lumen around an affected area of a patient;
a second inserting step of inserting an overtube device into the lumen, the overtube device comprising:
a tube body comprising a bending part and a main body part disposed proximally relative to the bending part;
a wire having a distal end part fixed to the bending part, and a proximal end part, the wire extending along a longitudinal axis of the main body part;
an operation part mounted on a proximal end side of the main body part, attached to the proximal end part of the wire, and configured to pull the wire to keep a curved shape of the bending part; and
an overtube base configured to fix the tube body in a longitudinal axis direction so as not to advance and retract, and to hold the wire pulled toward the proximal end side of the main body part, wherein the overtube base is configured to be switchable between a first state and a second state, wherein in the first state, the operation part is separated from the overtube base, and the operation part does not pull the wire, and wherein in the second state, the operation part is attached to the overtube base, and the operation part pulls the wire,
wherein the second inserting step comprises, while the overtube base is switched to be in the first state where the operation part is separated from the overtube base, controlling the operation part to not pull the wire while inserting the overtube device into the lumen guided by the endoscope;

a fixing step of switching the overtube base to be in the second state where the operation part is attached to the overtube base so that the tube body is fixed in the longitudinal axis direction and controlling the operation part to pull the wire to keep the curved shape of the bending part of the tube body; and
a third inserting step of inserting a treatment tool into the overtube.