Patent ID: 8523041

Claim:
A clamp member characterized in having a clamping surface that grips the organ tissue and a stapling surface on the side for stapling the organ wall, and a fork which is formed extending in the stapling direction, wherein there is provided to the fork: an organ gripping mechanism composed so as to grip in the vicinity of a stapling site on the organ tissue, the organ gripping mechanism provided with a first gripping teeth plate member in which a plurality of pointed teeth are disposed at equal pitch in the longitudinal direction of the fork, a second gripping teeth plate member having a plurality of rake teeth which are disposed to lie along the first gripping teeth plate member corresponding with the various pointed teeth, the rake teeth being disposed with the same pitch as that of the corresponding pointed teeth and being formed so that the distal end side thereof is directed toward the corresponding pointed teeth side, wherein the tips of the rake teeth and the tips of the pointed teeth are designed to coincide as a result of movement of the second gripping teeth plate member relative to the first gripping teeth plate member, a housing for housing the first gripping teeth plate member and the second gripping teeth plate member so as to enable relative movement there between, and a gripping teeth drive which is connected to at least one of either the first gripping teeth plate member and the second gripping teeth plate member and is for relative movement of the first gripping teeth plate member and the second gripping teeth plate member by one pitch increments in the longitudinal direction; an everting mechanism which is connected to the organ gripping mechanism and moves the organ gripping mechanism within an eversion movement range that transects the longitudinal direction of the fork and extends from a pre-eversion position at which the pointed teeth pierce the vicinity of the stapling side on the organ tissue, to a post-eversion site at which the stapling site on the organ tissue is positioned on the stapling surface; and a grip controlling mechanism which is disposed to the fork and defines the eversion movement range for the organ gripping mechanism, the grip controlling mechanism holding the organ gripping mechanism at the pre-eversion position and the post-eversion position, respectively, and controlling the first gripping teeth plate member and the second gripping teeth plate member when the organ gripping mechanism is moved to the post-eversion position side.