A catheter device includes a housing extending from a proximal end to a distal end, a fixed tubular segment extending from a proximal end immovably coupled to the housing to a distal end, an outer tubular member extending from a proximal end immovably coupled to the housing to a distal end, and an inner tubular member extending from a proximal end to a distal end. The inner tubular member is slidably received within an interior of the outer tubular member and is slidably received over an exterior of the fixed tubular segment. The inner tubular member is configured to slide relative to each of the fixed tubular segment and the outer tubular member to selectively extend or retract the distal end of the inner tubular member relative to the distal end of the outer tubular member.

A combination flush catheter and selective catheter as one convertible catheter and methods of using the same. The selective catheter may be a reverse curve or guide catheter. The additional steps of removal of the flush catheter and re-insertion of the selective catheter may be eliminated, reducing the possibility of errors and making the procedure smoother and shorter.

Everting balloon systems and methods for using the same are disclosed herein. The systems can be configured to access and dilate body lumen and cavities. For example, the systems can be used to dilate the cervix and access the uterine cavity. The systems can also be used to occlude the cervix. The systems can also be used to occlude the urethra.

An intravascular device delivery system has an elongated member with a flexible hypotube. The hypotube can be rotationally keyed to a steerable catheter. The flexible hypotube includes one or more cuts to allow bending of the flexible hypotube within a first plane. The steerable catheter is steerable to bend the flexible hypotube within the first plane, and longitudinally movable relative to the flexible hypotube to allow distal movement of the steerable catheter relative to a distal end of the flexible hypotube.

An expandable sheath assembly includes a support body extending from a proximal end to a distal end. A guide rod is interconnected to the support body and extends between the ends along an axis. A dilator extends from the guide rod for insertion into a body vessel, and a hub is releasable connected to the distal end of the support body. A distal sheath overlays the dilator, and a hemostatic valve is slidably disposed along the axis. A proximal sheath extends from the hemostatic valve and is disposed in surrounding and coaxial relationship with the guide rod. The proximal sheath is concurrently slidable with the hemostatic valve along axis to advance the proximal sheath through the hub and interleave the proximal sheath between the dilator and the distal sheath for lifting the distal sheath from the dilator and effectuating an expansion of the body vessel.

In one example, this disclosure is directed to a kit for intravascular implantation of an implantable medical device within a patient, the kit comprising an elongated outer sheath forming a first inner lumen with a distal opening, the outer sheath sized to traverse a vasculature of the patient, and an elongated inner sheath forming a second inner lumen. An outer diameter of the inner sheath is smaller than the diameter of the first inner lumen such that the inner sheath fits within the first inner lumen, wherein the inner sheath is slidable within the first inner lumen. The second inner lumen at a distal end of the inner sheath is configured to carry an implantable medical device. The inner sheath forms a slit at a distal end of the inner sheath to facilitate deployment of the implantable medical device out of the distal opening of the outer sheath.

A system of devices for treating an artery includes an arterial access sheath adapted to introduce an interventional catheter into an artery and an elongated dilator positionable within the internal lumen of the sheath body. The system also includes a catheter formed of an elongated catheter body sized and shaped to be introduced via a carotid artery access site into a common carotid artery through the internal lumen of the arterial access sheath. The catheter has an overall length and a distal most section length such that the distal most section can be positioned in an intracranial artery and at least a portion of the proximal most section is positioned in the common carotid artery during use.

A device for withdrawing a sheath from a shaft includes a housing a flexible timing belt that is a continuous band forming a loop that has an inner surface and an outer surface. The timing belt has a plurality of belt teeth on a surface of the timing belt. The delivery device is by rotation of a barrel that is actuated by an actuator coupled to a barrel having a plurality of teeth such that rotation of the barrel such that the barrel teeth engages the belt teeth to cause movement of the timing belt causing movement of the outer sheath.

Catheter devices provide for rolling movement between the inner and outer catheter tubes with a roller assembly in a radial gap between the inner and outer catheter tubes. Devices of the invention are particularly useful in minimally invasive implantations, such as the implantation of a vascular implant. A particular application is interventional catheter-assisted aortic valve implantation.

The disclosure includes a catheter system comprising an inner catheter and an outer catheter configured to at least partially receive the inner catheter. Each of the inner catheter and the outer catheter may comprise an outer surface and an inner surface, wherein each of the outer and inner surfaces may be coated in a hydrophilic coating. In some embodiments, the hydrophilic coating is configured to reduce surface tension and increase lubricity of the inner catheter and the outer catheter.