Abstract: A surgical device is provided including a shaft having a lumen and an opening disposed at a distal end, the shaft movable between a rear position and a forward position. An anvil is slidingly disposed in the opening between open and closed positions to capture tissue within the opening. The device also includes at least one electrode for applying RF energy to the tissue captured in the opening and an actuator operatively connected to the shaft for moving the shaft between the rear position and the forward position.

Abstract: A surgical end effector includes an anvil movable between a first position and a second position, the anvil having a concave anvil surface, and a convex mating surface. The anvil clamps a tissue structure between the anvil surface and the mating surface when in the second position, and wherein the mating surface has a different radius of curvature than the anvil surface.