A catheter system (10) includes a catheter assembly and a fluid storage unit (20) filled with fluid. The catheter assembly includes a catheter hub (12), a catheter (15), an extension tube (16) and an adapter (18). The catheter hub includes a distal end, a proximal end, a lumen extending between the distal end and the proximal end and a side port (14). The catheter (15) extends distally from the distal end of the catheter hub (12). A distal end of the extension tube (16) is coupled to the side port (14). The adapter (18) is coupled to a proximal end of the extension tube (16). The fluid storage unit (20) is coupled to the adapter (18) and includes a reservoir, a barrier and an actuator. The fluid is disposed within the reservoir. In response to breach of the barrier by the actuator, the reservoir is in fluid communication with the lumen of the catheter hub.
