An intravenous catheter assembly comprises a catheter hub having an elongate axis and a lumen a side port extending from the catheter hub, the side port being in fluid communication with the lumen and a one-way port valve positioned in the side port, the one-way port valve having a valve portion formed from a resilient material. The valve portion can comprise a cap and a hinge portion about which the cap is rotatable. The cap can be disposed over an aperture formed in an inclined end face of the valve portion.
