A catheter assembly 100 includes an elongate member 110 and a balloon 150. The elongate member defines at least one lumen 116 and an outer surface 110a. The outer surface defines at least one opening 112 in fluid communication with the at least one lumen. The balloon is disposed within the at least one lumen. The balloon is inflatable such that a portion of the balloon expands from the at least lumen through the at least one opening. The expansion of the balloon increases the flow restriction through the at least one opening compared to the flow restriction through the at least one opening when the balloon is in a deflated condition.
