How many kinds of scalpels are there?

Classification of medical devices: a class of medical devices that can ensure their safety and effectiveness through daily management. The second is medical devices whose safety and effectiveness should be controlled. The first category of instruments includes basic scalpels, and the second category of instruments includes general diagnostic instruments, physiotherapy rehabilitation instruments, clinical examination and analysis instruments, equipment and appliances in operating rooms, emergency rooms and clinics, portable oxygen generators of medical small oxygen generators, medical sanitary materials and dressings, medical absorbent cotton, medical absorbent gauze, absorbent cotton and medical absorbent gauze.