The invention provides a venous infusion apparatus, which comprises
bottle plug puncture outfits for an existing venous infusion apparatus, an
air filter, an observation window, a flow adjustor and a
syringe needle. The venous infusion apparatus is characterized in that during continuous and automatic infusion of multiple bottles of liquid
medicine, a
check valve or a switch floating valve is additionally mounted on a liquid outlet port of the
bottle plug puncture outfit of each
bottle of liquid
medicine, and a circuit switch device is additionally mounted at the rear of the switch floating valve of the last bottle of liquid
medicine. A circuit connected with the circuit switch device is parallelly connected with an
electromagnetic valve and an alarm. Automatic and
continuous infusion of the multiple bottles of liquid medicine is realized, the multiple bottles of liquid medicine do not need to be changed manually, when infusion of the last bottle of liquid medicine is finished, an infusion pipeline is
cut off automatically, simultaneously, the venous infusion apparatus makes an alarming sound, so that work intensity of
nursing staffs is greatly reduced, burden of infusion patientsor accompany members thereof is also reduced, and accidents are decreased. Accordingly, the venous infusion apparatus has a high
market development value.