Patent ID: 8105231
Filing Date: 2012-01-31
Classification: A61B

Abstract:
1. An apparatus for treating a blood vessel in a living-body tissue, the apparatus comprising: a grip portion; an inserting portion which is connected to the grip portion, wherein the inserting portion has a base end and a front end, and the inserting portion is insertable in the living-body tissue; an endoscope channel which is formed along a longitudinal direction of the inserting portion and into which an endoscope is insertable; a first channel, a second channel, and a third channel provided along the longitudinal direction of the inserting portion; a first support member having a base end and a front end and being movable to advance and return along the first channel, the front end of the first support member being connected to a blood vessel cutting portion for cutting a branch of a blood vessel to be removed; a second support member and a third support member which are movable to advance and return along the second channel and the third channel, respectively, and which are arranged parallel to the longitudinal direction of the inserting portion on an opposite side of the endoscope from the first support member, each of the second and third support members having a base end and a front end, and the front ends of the second and third support members being connected to a blood vessel holding member for holding the blood vessel; an operating portion which is provided to the grip portion and which is operable to advance and return the blood vessel holding member and the blood vessel cutting portion in the longitudinal direction of the inserting portion; and an air feed portion which feeds gas in the inserting portion so as to discharge the gas from an opening arranged in a front end surface of the front end of the inserting portion, the opening being adjacent to an endoscope opening portion of the endoscope channel; wherein the gas is fed to and discharged from the opening via the air feed portion; wherein the blood vessel holding member comprises a blood vessel keeping bed provided between the second support member and the third support member at the front ends of the second and third support members, the blood vessel keeping bed being movable to travel along the longitudinal direction of the inserting portion while remaining between the second support member and the third support member and while keeping a part of the blood vessel in contact with the blood vessel keeping bed; wherein the second support member holds the blood vessel keeping bed such that the blood vessel keeping bed advances and returns along the longitudinal direction of the inserting portion in accordance with movement of the second support member; and wherein the third support member is movable to advance and return with respect to the blood vessel keeping bed, such that the third support member is movable to return from the blood vessel keeping bed toward the front end of the inserting portion to open a closed space for accommodating the blood vessel, the closed space being formed by the blood vessel keeping bed, the second support member, and the third support member.