Abstract: A method is providing for making a thin-walled catheter of the type having a distal end adapted to be formed into a curve and guided through branching blood vessels or the like so that the catheter is provided with a two-layered tubular body portion having a rigid inner sheath and a flexible outer sheath, which may be radiopaque. The catheter exhibits excellent torque response and control while being especially thin-walled, thereby permitting minimization of the outer diameter size while providing excellent liquid flow rates therethrough and excellent strength properties. The tip portion is fuseless with respect to the rest of the catheter, the tip portion being an integral extension of the flexible outer sheath that is formed over a gap between lengths of the rigid inner sheath.

Abstract: A multi-layered article is provided wherein at least one of the layers is made of an inert material that strongly resists adherence of adhesives thereto. The inert substrate of the multi-layered article has a thin plasma deposited film thereon, and an adhesive layer bonds another substrate to this thin plasma deposited film.

Abstract: A thin-walled guiding catheter of the type having a distal end adapted to be formed into curved configurations and passed through branching blood vessels and the like is prepared with a three-layered tubular body portion having a lubricious inner sheath defining a lubricious guiding lumen, a rigid intermediate sheath, and a flexible outer sheath, which may be radiopaque. The distal tip portion thereof has a similar construction, but from which the rigid intermediate sheath is omitted. The guiding catheter exhibits excellent torque response and control while being especially thin-walled, thereby permitting minimization of the outer diameter size while permitting passage of an intravascular catheter and the like through its lumen.

Abstract: A thin-walled catheter of the type having a distal end adapted to be formed into a curve and guided through branching blood vessels or the like is provided with a two-layered tubular body portion having a rigid inner sheath and a flexible outer sheath, which may be radiopaque. The catheter exhibits excellent torque response and control while being especially thin-walled, thereby permitting minimization of the outer diameter size while providing excellent liquid flow rates therethrough and excellent strength properties. The tip portion is fuseless with respect to the rest of the catheter, the tip portion being an integral extension of the flexible outer sheath that is formed over a gap between lengths of the rigid inner sheath.