It includes outer jaw shell, the channel passed therethrough that tissue treatment disk and one longitudinally extend that end effector assembly, which is configured to surgical instrument or surgery systems including the first and second jaw members,. At least the first and second jaw members can be between spaced position and approximated position relative to another. Cutting mechanism is grasped between jaw member for cutting tissue. Cutting mechanism may include the starting unit knife of connection and be configured to promote surgical operation laterally between jaw member, a kind of hot estimated performance lengthens that piece is configured to be advanced to its cross cutting sword between jaw member or clutch and spring mechanism are configured to dispose knife along longitudinal direction between jaw member.