Abstract: The invention is directed to a catheter component having at least a section with a light emitting substance. Preferably, the light emitting substance is in or on a polymeric wall defining a lumen and a port, so that the port is outlined by the light emitting substance. In one embodiment, the component is a shaft of the catheter, and in another embodiment, the component is a proximal adapter connected to the proximal end of the catheter shaft. The light emitting substance preferably emits visible light, to facilitate the ability to see the component as other devices or components are introduced into or attached onto the port outlined by the light emitting substance during a medical procedure.