Dielectric heating device for heating cannula members

摘要: A cannula for insertion into a body cavity, duct, or vessel of patient includes parent member and an integral radiopaque tip. The tip is configured so as to be distinguishable from internal parts in X ray flouroscopic image, thus serving precisely locate the position within without substantially obstructing physician's view such parts. are separately pre-formed non-toxic polymeric material can constructed have different hardnesses. In one embodiment softer than order prevent injury patient, while second harder facilitating certain catheterization applications. then dielectrically heated welded securely together form unitary, cannula. electrodes dielectric heating apparatus connected dies whose diametrical dimensions conform closely those provide present with completely smooth interior exterior surfaces. burning during this process, air vented junction area by providing outer die convex surface forming longitudinal grooves external inner mandrel. mandrel formed encapsulating electrode highly insulative further inhibit