Abstract: A manually operable clip operable as a hemostasis valve for use with intravenously inserted catheters. The valve preferably comprises a unitary piece of wire formed to have first and second jaw portions defining front and back ends that preferably include transversely extending arms formed thereon. The valve is further formed such that a spring portion is provided interconnecting the first and second jaw portions that extends intermediate the front and back ends thereof and between said transversely extending arms which is operable to bias the front ends towards each other such that when positioned upon the catheter, such biasing force causes the lumen thereof to assume a closed state. The back ends of the first and second jaw portions may be manually actuated to release the clip from the catheter.