A circular stapling device (10), comprising: a handle assembly (20)； an elongated body (30) extending from the handle assembly； a cartridge assembly (100) mounted at a distal end of the elongated body and which is movable with respect to the distal end of the elongated body between a first position and a second position, the cartridge assembly is positioned adjacent to the distal end of the elongated body in the first position and is spaced from the distal end of the elongated body in the second position, the cartridge assembly includes a tissue coupling surface (112) extending to an annular edge (112a)； and a cartridge buttress member (140) having a body part (142) and an extension part (144) extending from the body part of the cartridge buttress member, wherein when the cartridge assembly is disposed in the first position, the body part is supported on the tissue coupling surface of the cartridge assembly and the extension part extends over the annular edge so that the extension part is secured between the elongated body and the assembly of cartridge to keep the buttress member supported on the cartridge assembly, where a spring assembly (130) is secured between the cartridge assembly and the distal end of the elongate member, the spring assembly is adapted to pull the assembly from cartridge toward the distal end of the elongated member to keep the cartridge assembly in close proximity to the distal end of the elongated member when the cartridge assembly is disposed e in the first position.Un dispositivo de grapado circular (10), que comprende: un conjunto de asidero (20)； un cuerpo alargado (30) que se extiende desde el conjunto de asidero； un conjunto de cartucho (100) montado en un extremo distal del cuerpo alargado y que es movible respecto al extremo distal del cuerpo alargado entre una primera posición y una segunda posición, el conjunto de cartucho se posiciona adyacente al extremo distal del cuerpo alargado en la primera posición y está espaciado del extr
