A medical device for sealing and repairing defects in a body lumen wall includes a wire frame and a partially-circumferential stent body. The method and system transmit information through the human body to a receiver located outside the human body using low current and voltage polarity, so that they cause no damage to the human body and achieve low power consumption and better receiving sensitivity. The motor driving unit is connected to the step-down divider to obtain low voltage DC power to operate. On the basis of the preset information, the broadcast-signal receiving means 11 receives a broadcast signal of a specific frequency that the user has selected. The first fixing nut has a joint protrusion that is inserted into the nut fixing groove of the fixing flange, and the second fixing nut has a joint protrusion that is inserted into the nut fixing groove of the connecting flange. Additionally, the MOF compound may comprise any of Cu-BTC, MOF-177, and an isoreticular metal-organic frame work compound.