Twardowski and collegues designed the swan neck catheter. This catheter was designed to exit laterally and has a permanent bend in the subcutaneous portion of the catheter resulting in an arcuate tunnel that is convex upward. Both the internal and external exits point downward. The bend and arc are designed to prevent catheter migration and cuff extrusion. The downwards exits and subcutaneous cuff placements are designed to reduce exit site infections
Sometimes the catheter will then move easily and slide back into the pelvis. This technique is not practical when the cannula has a swan-neck configuration