A medical device, such as a catheter shaft, having an inner lumen defined
by a layer of polymer coating, and a method for forming such a medical
device. In some embodiments, the method generally includes the steps of
applying a polymer coating to an elongated mandrel, and constructing the
remainder of the catheter shaft body around the polymer coated mandrel.
In some embodiments, the polymer coating layer is made from water
dispersible polymer or water soluble polymer.