Most likely yes.
A hep-lock is a connection filled with Heparin
to prevent clotting in the IV line between uses.
If this has a part that can be opened, or a rubber end, then the blood unit can be hooked up and connected, or a needle can go through the rubber end. Otherwise, it can simply be removed and then the blood unit can be connected. Either way it can be done, and the little Heparin should not interfere.