Abstract: A mixed coil catheter includes a hollow inner liner defining a lumen, having an exterior surface, and defining a middle point, a single support cord coiled around the exterior surface of the inner liner starting from an intermediate point in a distal direction up to a support end plane and then reversed in the proximal direction proximally away from the support end plane at least past the middle point of the inner liner, having a maximum outer diameter, and forming an end wall at the support end plane, and an outer liner covering the inner liner and the support cord to fix the support cord in place.