A medical device may include a handle housing (18) having a side wall defining an interior space and proximal and distal apertures (129b, 129a) extending through the side wall, an elongated outer sheath, an elongated inner member, a proximal flush port (128) disposed within the interior space and in fluid communication with the elongated inner member, and a distal flush port (126) disposed within the interior space and in fluid communication with the elongated outer sheath. A control knob (122) may be rotated to move the distal flush port within the interior space.
