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Infusion, Injection, And Reservoir Apparatuses
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Abstract
A kind of equivalent fluid exchanger comprising: an injection device having a compartment, a propelling rod, a press part and a catheter, the propelling rod can move in the compartment to let the fluid it draw or eject in and out of the catheter; a drawing device having a compartment, a propelling rod, a press part and a catheter, the propelling rod can move in the compartment to let the fluid it draw or eject in and out of the catheter; and propelling rod of the injection device connects with that of the drawing device, so when the rod of the former moves a section of distance in the compartment, the rod of the latter moves an equal distance in the compartment.