An interventional catheter for treating an artery includes an elongated body sized and shaped to be transcervically introduced into a common carotid artery at an access location in the neck. The elongated body has an overall 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 modular guidewire system includes at least one guidewire module having a solid polygonal shaped prism extending from a body of the guidewire module at a first end and a recess having a polygonal prism shape at a second end. The modular guidewire system also includes at least one guidewire tip module having a tip at a first end and connecting end at a second end, the connecting end including a solid polygonal shaped prism extending from a body of the guidewire tip module or a recess having a polygonal prism shape. A first guidewire module is attachable to a first guidewire tip module by inserting the solid polygonal shaped prism of the guidewire module into the polygonal prism shaped recess of the guidewire tip module, or inserting the solid polygonal shaped prism of the guidewire tip module into the polygonal prism shaped recess of the guidewire module.

A persistent perfusion sheath assembly can be used for the passage of an intravascular medical device while maintain a flow passage in the vessel. The sheath assembly passes through an arteriotomy and can include a first lumen configured for the passage of a medical device, a second lumen configured to allow a flow of fluid from a location in the blood vessel upstream of the arteriotomy to a location downstream of the arteriotomy. The sheath assembly can further include a stylet, a sleeve or an additional sheath configured to selectively open and close the flow of blood between upstream and downstream of the arteriotomy. The sheath assembly can further include a closure device distal of the arteriotomy, the closure device configured to control blood flow through the arteriotomy.

An introducer sheath system includes a sheath member defining a tubular structure extending between a proximal end and a distal end of the sheath. The system includes a tip portion provided at the distal end of the sheath member. The tip portion defines a tubular structure extending between a proximal end and a distal end of the tip portion. The tip portion has a central lumen extending therethrough. The tip portion includes a camming feature formed as a protrusion from the central lumen of the tip portion. The tip portion is movable between a non-expanded configuration when the camming feature is not engaged and an expanded configuration when the camming feature is engaged. When the tip portion is in the non-expanded configuration, a diameter of the distal end of the tip portion is less than a diameter of the proximal end of the tip portion.

A catheter includes a first region having a first outer diameter; a second region having a second outer diameter larger than the first outer diameter; and a transition region connecting with the first region and the second region, the transition region having an outer diameter being equal to or larger than the first outer diameter and equal to or smaller than the second outer diameter, wherein the outer diameter of the transition region gradually decreases from the second region toward the first region, and part of an outer circumferential surface of the transition region is formed in a shape having a step portion.

A sheath assembly for use with an endoscope and an endoscope that includes the sheath assembly. The sheath assembly can include an elongate tubular sheath configured to thread onto a shaft of the endoscope. The sheath can include a pliable segment at a distal end of the sheath, and a tensile filament extends along a circumference of the pliable segment. The tensile filament can form a cinching loop at a distal end of the pliable segment. The sheath can be displaceable along the endoscope between a retracted position and an extended position. The pliable segment can extend distally beyond a distal end of the endoscope to form a chamber, and proximal displacement of the tensile filament tightens the cinching loop to convert the chamber from an open configuration to a closed configuration.

A matter elimination catheter includes a catheter body extending from a catheter proximal portion to a catheter distal portion. The catheter body includes an infusion lumen, an aspiration lumen fluidly isolated from the infusion lumen, and a septum interposed between the infusion and aspiration lumens. A drive shaft is within the infusion lumen and is configured to provide rotation near the catheter distal portion. A guide wire lumen is within the drive shaft, and the infusion lumen, the drive shaft and the guide wire lumen are fluidly separated from the aspiration lumen with the septum. In one example, fluid bearings are formed between one or more of the catheter body and drive shaft or the drive shaft and a guide wire or guide wire liner when supplied with infusion fluid through the infusion lumen.

The present invention relates to a cannula comprising a catheter assembly, a body member, an elongated tubular member, a needle hub, and a safety device fixedly connected to a distal end of the elongated tubular member and releasably connected to the body member. The body member includes an annular groove, and the safety device comprises locking elements. When the needle is retracted from the catheter assembly after puncturing the vein of a patient, the body member is disengaged by disengaging the locking elements from the annular groove, thereby separating the safety device from the body member after the needle has been arrested within safety device. The locking elements are solid spherical elements of stainless steel material.

A steerable transseptal punch system and method of using the steerable transseptal punch system to access the left atrium.

Medical devices and methods for making and using medical devices are disclosed. An example medical device may include a guide extension catheter. The guide extension catheter may include a proximal shaft having a first outer diameter. A distal sheath may be attached to the proximal shaft and may have a second outer diameter greater than the first outer diameter. The distal sheath may be designed to extend past a coronary ostium and into a coronary artery so that another medical device can pass therethrough toward the coronary artery. An expandable balloon may be coupled to the distal sheath.