The correct way to vent an indwelling needle is to use the method of air-to-air venting. The needle is mainly in the intravenous infusion, the infusion tube has gas, this case can be used to the air emission method, the opening of the infusion tube, open to the air, the liquid inside will flow out through gravity naturally will be the infusion tube gas discharge. Needle venting should pay attention to the opening of the infusion tube should be lower than the infusion bottle, so as to play a role in the discharge of gas, in addition to pay attention to the addition of medication to discharge the gas inside can be used to put the infusion jug method, the infusion bottle of liquid into a small pot, to discharge the air inside. The use of indwelling needle to pay attention to the specific operation method, it is recommended to go to the regular hospital, there are professional medical personnel to operate, so as to avoid accidents due to improper operation.