Abstract: A medical stapler is a medical stapler used together with an endoscope and includes a flexible elongated member extending in a length direction of the endoscope, a wire inserted inside the elongated member and movable forward and backward with respect to the elongated member, a suture assembly connected to a distal end of the wire and being able to suture a gripped treatment target with a staple, an operation unit connected to a rear end of the wire and ejecting the staple from the suture assembly by moving the wire forward and backward, and an ejection restriction structure restricting ejection of the staple when a tension applied to the wire is equal to or less than a first tension caused by a change in shape of the elongated member.

Abstract: A medical stapler is a medical stapler used together with an endoscope and includes a flexible elongated member extending in a length direction of the endoscope, a wire inserted inside the elongated member and movable forward and backward with respect to the elongated member, a suture assembly connected to a distal end of the wire and being able to suture a gripped treatment target with a staple, an operation unit connected to a rear end of the wire and ejecting the staple from the suture assembly by moving the wire forward and backward, and an ejection restriction structure restricting ejection of the staple when a tension applied to the wire is equal to or less than a first tension caused by a change in shape of the elongated member.

Abstract: An overtube for an endoscope includes: a tube body having a main lumen through which the endoscope is inserted and an air-supply lumen through which gas flows; a fixing balloon provided on an outer peripheral surface of a distal end of the tube body, expandable outward from the outer peripheral surface and contractible toward the outer peripheral surface; an air supply device configured to send the gas to the air-supply lumen; and an airtight valve unit having a tubular portion communicating with the main lumen at a rear end of the tube body, the airtight valve unit closing the gap between the endoscope inserted through the tubular portion into the main lumen and an inner peripheral surface of the tubular portion.