The discussion on whether to use the straight end of the wire for placing central lines reminded me an argument about what's the proper way of using the DLT exchange catheter from Cook. Someone showed me that you should stick the green, stiffer end down a SLT before exchange it for a DLT. I was always taught to put the blue, floppier end down to avoid tracheal injury. But I stopped using it precisely because the floppy end is never that helpful for reinserting the DLT. Am I wrong?