A tunneler device includes a handle, a shaft extending distally from the handle, a connecting segment, a fluid channel, and a one-way flush valve. The connecting segment includes a body positioned on a distal end of the shaft configured to engage one end of a catheter. The fluid channel extends from the handle to a distal end of the connecting segment. The fluid channel is configured to direct fluid to be selectively passed therethrough for flushing a catheter. The one-way flush valve is supported on the handle and is disposed in fluid communication with the fluid channel.
