Patent ID: 8992548
Filing Date: 2015-03-31
Classification: A61B

Abstract:
1. A method for ligating an internal body tissue using an outer cylinder member formed in the shape of a cylinder, having a base end configured to attach to and release from an end of an inserted part of an endoscope in which a channel is formed, and an inner cylinder member formed in the shape of a cylinder and being capable of sliding within the outer cylinder member, the method comprising the processes of: projecting the inner cylinder from a front end of the outer cylinder member; attaching a ligation band member which has annular shape and is configured to freely extend to an outer peripheral surface of the inner cylinder member that projects out from the front end of the outer cylinder member; contacting a front end of the inner cylinder member with an internal body tissue; suctioning an inside of the inner cylinder member via the channel communicated with the inside of the inner cylinder member which is in contact with the internal body tissue so as to form a negative pressure at the inside of the inner cylinder member such that the internal body tissue is drawn into the inner cylinder member and the inner cylinder member slides relative to the outer cylinder member; and ligating the internal body tissue with the ligation band member, by disconnecting the ligation band member from the front end of the inner cylinder member when the inner cylinder member is drawn into the inside the outer cylinder member at a position where the ligation band member is disconnected, wherein while suctioning the inside of the inner cylinder member, the internal body tissue is drawn into the inner cylinder member due to suctioning under a first suction pressure by depressing a suction button, and the inner cylinder member slides relative to the outer cylinder member to disconnect the ligation band member from the front end of the inner cylinder member solely by a second higher suction pressure.