A delivery member is provided for delivering and deploying an intravascular medical device. The delivery member includes a flexible distal portion including a wound wire coil surrounded by a flexible sleeve and inhibited from extending lengthwise by a stretch resistant member positioned through the lumen of the coil. The delivery member can include hypotubes positioned on either side (distally and proximally) from the wound wire coil to which the stretch resistant member and the wound wire coil can be attached.

A catheter delivery device for a self-expanding stent is described. The delivery device includes a distal catheter component and a distal sheath that releases the stent by moving proximally relative to the distal catheter component and the stent. A proximal catheter shaft including a tube and a pull wire within a lumen of the tube may be provided, the pull wire being attached to the distal sheath such that pulling the pull wire proximally relative to the tube pulls the distal sheath proximally to release the stent progressively. A casing tube may be provided to surround the catheter shaft, the casing tube having a distal end that receives telescopically a proximal end of the distal sheath. A method of making a delivery device for implantation of a self-expanding stent is also described.

Embodiments include a catheter comprising a proximal handle, a distal tip, and a shaft extending between the proximal handle and the distal tip. The shaft comprises an outer polymer layer, and an inner polymer layer disposed adjacent to the outer polymer layer and defining an internal lumen. The inner polymer layer includes a blend of two or more polymers, and the blend of two or more polymers includes PTFE and one or more copolymers.

Methods and devices described for improved dynamic walled tubing and catheters.

A cannula comprising a plastic tube having three longitudinal chambers, including a main chamber, a first lateral chamber and a second lateral chamber, and at least one reinforced section ensuring constant internal diameter, wherein the cannula is equipped from the distal side with a round end narrowing towards the end, in which there are longitudinal holes of a size enabling free venous blood flow, and a balloon. A fragment of the reinforced tube section located below the balloon is bent under an angle α of approximately 90°. From the proximal side, the tube ends with a flexible cone, sealing the cannula tightly, inside which there is a valve closing the main chamber and a port for inflating the balloon connected to the first lateral chamber.

An electrophysiology catheter comprising a tubular shaft, the shaft having a proximal portion, a distal portion having a distal end and a deflection region, the shaft defining a longitudinal axis and including an outer tubular jacket, and articulation member disposed within the jacket in the deflection region, the articulation member comprising a plurality of longitudinally-arranged tubular segments, a plurality of first connecting segments, and a plurality of second connecting segments, wherein adjacent tubular segments are joined by respective ones of the first and second connecting segments, and wherein all of the first and second connecting segments are disposed in a first plane extending through the longitudinal axis. A first reinforcing member and a second reinforcing member extend through the plurality of first and second connecting segments, respectively.

Described are methods, systems, devices for facilitation of intraluminal medical procedures within the neurovasculature. A catheter advancement device includes a flexible elongate body having a proximal portion coupled to a proximal end region of the flexible elongate body and extending proximally to a proximal-most end of the catheter advancement element. A hardness of the flexible elongate body transitions proximally towards increasingly harder materials up to the proximal portion forming a first plurality of material transitions. At least a portion of the flexible elongate body is formed of a plurality of layers including a reinforcement layer. An outer diameter of the flexible elongate body is sized to be positioned coaxially within a lumen of a catheter such that a distal tip portion of the flexible elongate body extends distally beyond a distal end of the catheter to aid in delivery of the catheter to an intracranial vessel.

A catheter can have a textured outer body surface with protrusions and/or indentations that can reduce friction between the outer body surface and vascular anatomy or an inner lumen of another catheter in contact with the outer body surface. The catheter can include protrusions and/or indentations on an inner lumen surface that can reduce friction between the inner lumen surface and an outer body surface of another catheter within the example catheter. The protrusions can be filled with a lubricant or vasodilating drug, and the protrusions can be configured to break to release the fluid in response to forces on the protrusion during navigation through vascular anatomy and/or an inner lumen of another catheter. The catheter can include a metallic tubular reinforcing layer with openings through which the protrusions and/or indentations extend and/or protrusions and/or indentations shaped into the reinforcing layer.

The objectives for the designs presented herein can be for a variably flexible and kink-resistant catheter for vascular applications. The designs benefit from good compressive and tensile stiffness. A braided wire support structure can be disposed around an inner liner and an outer layer having a plurality of outer jackets of variable durometer. A metallic reinforcing layer can be cut from a hypotube and be used as the primary structure for catheter stiffness, reducing the reliance on and number of jackets to transition stiffness changes along the length of the catheter. The metallic reinforcing layer can have one or more ribbon cut segments and one or more axial hole patterns laser cut into the hypotube to progressively evolve the stiffness from proximally regions with more column stiffness and distal regions with greater lateral flexibility. The polymer jackets can be reflowed to bond the structure together.

Embodiments of the present disclosure are related to intravascular devices having improved rapid-exchange configurations and associated systems and methods. In some particular embodiments, the devices of the present disclosure include a reinforced rapid-exchange port, an offset rapid-exchange port, and/or combinations thereof. For example, in some implementations an intravascular imaging device is provided that includes a main catheter body; a rotational imaging element positioned within a lumen of the main catheter body; a distal portion extending from the main catheter body, the distal portion having a rapid-exchange port in communication with a guidewire lumen, the rapid-exchange port and the guidewire lumen sized and shaped to receive a guidewire; and at least one reinforcing element positioned adjacent to the rapid-exchange port.