A catheter assembly including catheter and a stylet inserted within a central lumen of the catheter. The catheter may be peripherally inserted central catheter including a hub coupled to an elongate body defining a central lumen with one or more extension legs coupled to the hub. The stylet includes a stylet tube having a plurality of magnets together with a lubricant disposed within a lumen of the stylet tube. The lubricant enables sliding displacement of the magnets within the lumen during a bending event of the stylet. A wire may also be disposed within the lumen of stylet tube and the wire may wrapped around each magnet. An attachment member of the stylet may be coupled with a connector of the catheter. An electrode may be coupled to the wire.

A steerable catheter has a body with an outer surface and an inner surface defining a central lumen. The outer surface and inner surface define a wall of the body, which has a plurality of steering lumen and control lumen extending longitudinally therethrough. The body includes a body material. The steering lumen and control lumen have a control lumen lining and steering lumen lining, respectively, with a higher durometer than the body material. A steering wire is positioned within the steering lumen and a control wire is positioned within the control lumen.

An expandable sheath body for a sheath assembly. The sheath body has a tubular frame having a lumen therein. The frame has interstices therein. The frame is expandable to a larger diameter and contractable to a smaller diameter, and also flexible. The sheath body has an inner liner formed over a surface of the lumen defined by the tubular frame and an outer liner formed over an exterior surface of the frame. The inner liner and an inner layer of a multilayer outer liner may be made of expanded polytetrafluoroethylene. The expanded polytetrafluoroethylene may be infused with silicone oil for increased lubricity.

In some examples, a catheter includes an elongated body including a proximal portion and a distal portion. The elongated body includes an inner liner, an outer jacket, a structural support member positioned between at least a portion of the inner liner and at least a portion of the outer jacket, and an expandable member coupled to the structural support member at the distal portion of the elongated body. The expandable member may be configured to expand radially outward, e.g., to engage a clot within vasculature of a patient.

The disclosure generally relates to retractable sheaths for protecting a luminal surface of a bodily vessel or canal from the introduction of a medical device within the bodily vessel or canal comprising a valve, a continuous elastomeric outer tube, and an at least partially discontinuous inner tube wherein the at least partially discontinuous inner tube is located within the outer tube luminal channel to form a circumferentially retractable elongated sleeve; also retractable sheaths comprising a rigid collar and a circumferentially retractable elongated sleeve comprising two separate layers including a continuous elastomeric outer layer and an expandable inner layer discontinuous at least in part, are disclosed herein.

In some embodiments, the disclosure describes a catheter system for applying energy to a vessel, such as a vein. The system may include an elongate catheter shaft having a distal end and a proximal end opposite the distal end, and an energy application device coupled to the distal end of the elongate catheter shaft. The energy application device may be configured to apply energy to the vessel. The system may also include a gauge positioned relative to a working surface. The gauge may be configured to determine a distance that the elongate catheter shaft travels with respect to a treatment zone.

A medical device includes an elongate shaft including a multifilar coil comprising a first strand and a second strand wound in the same winding direction, the multifilar coil comprising a first section having a first end and a second end wherein the first strand and the second strand are wound with identical pitch patterns between the first end and the second end of the first section, the multifilar coil further comprising a second section having a first end and a second end, wherein the first strand and the second strand are wound with different pitch patterns from each other between the first end and second end of the second section, and a polymeric tubular member coextending with the multifilar coil.

A vascular embolization device includes a coil with a primary shape and an stretch resistant wire provided inside the coil, in which the stretch resistant wire is a multilayer strand including at least one core layer and at least one outer layer including one or more resin compositions and a biochemical active material, and the core layer is composed of a material with a tensile break strength higher than that of the outer layer. The vascular embolization device has the function of administering a biochemical active material and also has good flexibility.

A medical device including an elongated tubular body having opposed proximal and distal end portions and defining a longitudinal axis, the elongated tubular body including an interior lumen extending therethrough, wherein an inner surface of the interior lumen includes at least one longitudinal depression formed therein, configured to provide pressure relief to accommodate movement of a medical device passing through the interior lumen.

In various examples, a shaft for an elongate medical device extends along a shaft length. The shaft includes a shaft axis, an outer surface, and an inner surface. The inner surface defines an inner lumen. A liner forms the inner surface of the shaft. A coil is disposed around and outwardly from the liner. The coil is formed from a flat wire. The flat wire includes a wire width and a wire height, wherein the wire height is greater than the wire width. The wire height extends substantially radially with respect to the shaft and the wire width extends substantially longitudinally with respect to the shaft. A jacket is disposed around and outwardly from the coil. The jacket forms the outer surface of the shaft.