Abstract: A medical connecting device, having a proximal end and a distal end; the medical connecting device includes an insulating layer (3, 123, 222, 322) and a spiral tube (2, 124, 223, 323), the insulating layer (3, 123, 222, 322) covering the outermost layer of the whole device; the spiral tube (2, 124, 223, 323) has a conductive hollow tubular structure; and the spiral tube (2, 124, 223, 323) has a spiral structure, and a pitch of the spiral structure gradually changes in the direction from the proximal end to the distal end. The medical connecting device is able to integrate multiple functions such as electricity conducting, liquid passage, powder spraying, negative pressure suction, sealing, insulation, and support.

Abstract: A medical connecting device, having a proximal end and a distal end; the medical connecting device includes an insulating layer (3, 123, 222, 322) and a spiral tube (2, 124, 223, 323), the insulating layer (3, 123, 222, 322) covering the outermost layer of the whole device; the spiral tube (2, 124, 223, 323) has a conductive hollow tubular structure; and the spiral tube (2, 124, 223, 323) has a spiral structure, and a pitch of the spiral structure gradually changes in the direction from the proximal end to the distal end. The medical connecting device is able to integrate multiple functions such as electricity conducting, liquid passage, powder spraying, negative pressure suction, sealing, insulation, and support.

Abstract: Disclosed is a bipolar high-frequency electric knife, including a cutter portion, a main body part and an operation portion. The cutter portion includes a first electrode portion, a second electrode portion and an insulation member. The main body part includes a position-limiting part and an insulation sheath. The operation portion includes a handle, a button, a socket, a first wire and a second wire.