A catheter adapter apparatus includes an adapter body. The adapter body includes a fluid source end adapted for connection to a fluid source and having an internal bore to transfer the fluids supplied by the fluid source, and a catheter end for connection to a catheter tube. The catheter end includes first and second members. Each of the first and second members is adapted for reception within corresponding lumens of the catheter tube. At least the first member defines an internal bore in fluid communication with the fluid source end to transfer the fluids supplied by the fluid source.