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 end, a distal end, and a single lumen extending therebetween. The flexible elongate body has a proximal segment, an intermediate segment, and a tip segment. The proximal segment includes a hypotube coated with a polymer. The intermediate segment includes an unreinforced polymer having a durometer of no more than 72D. The tip segment is formed of a polymer different from the intermediate segment and has a durometer of no more than about 35D and a length of at least 5 cm. The tip segment has a tapered portion that tapers distally from a first outer diameter to a second outer diameter over a length of between 1 and 3 cm.

Systems (1100) for treating a blood flow passage are discloses herein. In one example, a treatment device includes an expandable element (1104) configured to be positioned within the passage and a reinforcing element (1102). The expandable element may have an expanded configuration in which the expandable element defines a lumen (1108) therethrough. The reinforcing element may be positioned within the lumen of the expandable element. The reinforcing element may be coupled to the expandable element such that expansion of the expandable element causes the reinforcing element to radially expand, thereby creating a perfusion lumen through the device.

A catheter assembly includes an outer shaft having an outer shaft body forming an outer shaft bore that receives an inner shaft. The outer shaft has a wire transition section. The catheter assembly includes an exit path connector coupled to the outer shaft body at the wire transition section. The exit path connector has a rigid body section separate and discrete from the outer shaft body and coupled to the outer shaft body. The body section defines an exit path connector bore that receives the inner shaft. The body section has a side exit port at a side of the body section being open to the exit path connector bore. The catheter assembly includes a catheter wire passing through the side exit port from an interior to an exterior of the cable exit port.

Reinforced catheter tips, catheters including rapidly insertable central catheters (“RICCs”), and methods thereof reduce the number of steps and medical devices involved in introducing catheters into patients. In an example of a catheter, a RICC can include a catheter tube, a catheter hub coupled to a proximal portion of the catheter tube, and a plurality of extension legs extending from the catheter hub. The catheter tube can include a first section in a distal portion of the catheter tube and a second section proximal of the first section. The first section of the catheter tube can distally terminate with a catheter tip reinforced with a reinforcement band therein. The plurality of extension legs that extend from the catheter hub can be equal in number to a plurality of lumens extending through the RICC. In another example, a method can include a method of making the foregoing RICC.

A delivery sheath and a medical device. The delivery sheath includes an outer canal and a traction structure. The outer canal includes a connecting canal, a canal body, and a distal canal. The canal body is located between the connecting canal and the distal canal. The canal body includes a first flexible canal, a spacer canal, and a second flexible canal. The spacer canal is provided between a distal end of the first flexible canal and a proximal end of the second flexible canal. The hardness of the connecting canal is greater than that of the first and second flexible canals, and the hardness of the spacer canal is greater than that of the first and second flexible canals. The traction structure includes a first traction fiber and a second traction fiber.

The disclosure sets forth various exemplary embodiments of systems, methods, and/or medical apparatuses including but not limited to: a sheath; and a balloon disposed at a working distal end of the sheath. According to one example embodiment the medical device can include where the sheath can include woven wire reinforcing axial and longitudinal strength, side holes, a one direction distal valve, and can include an inflator. According to one example embodiment the medical device can include where the sheath can include a narrow cross-section of, e.g., 7-8 Fr and balloon of length of, e.g., 12 cm.

A catheter assembly includes a catheter shaft having shaft proximal and distal portions. A hub is coupled with the catheter shaft proximate the shaft proximal portion. A graduated strain relief fitting is coupled between the catheter shaft and the hub. The graduated strain relief fitting includes at least a first flexural modulus proximate the hub and a fitting proximal portion. The graduated strain relief fitting includes a second flexural modulus proximate the catheter shaft and a fitting distal portion. The second flexural modulus is less than the first flexural modulus and less than or equal to a catheter shaft flexural modulus. The first and second flexural moduli are modulated with one or more of a taper, flexure joints, fitting frame of the fitting or material of the fitting body.

In a multiple-lumen catheter having multiple guidewires for treatment of vascular blockages, the catheter comprising a proximal-end assembly, a distal-end portion and a multi-lumen medial portion therebetween, the improvement wherein: (1) the multiple guidewires are preloaded in the catheter, each guidewire in its own single-guidewire lumen extending from its own guidewire entry port in the proximal-end assembly to a lumen convergence portion; and (2) the distal-end portion includes: (a) the lumen convergence portion along which the multiple lumens merge into a single output lumen sized to match the largest-diameter lumen of the multiple lumens, (b) an intermediate distal-end section connected to the lumen convergence portion and surrounding the single output lumen continuing therethrough, and (c) a tapered tip surrounding the single output lumen continuing therethrough.

A balloon catheter includes a balloon coupled to a shaft. The shaft includes a proximal perfusion portion disposed proximal of the balloon and a distal perfusion portion disposed distal of the balloon. The proximal and distal perfusion portions each are formed by a respective plurality of wire members woven together to form a respective proximal and distal braided shafts. The plurality of wire members are woven together such that a plurality of perfusion openings are formed between the wire members. The plurality of perfusion openings extend from an outer surface of the respective proximal or distal braided shaft to a lumen of the respective proximal or distal braided shaft. A perfusion lumen extends between the proximal perfusion portion and the distal perfusion portion.

A guide extension catheter includes a push member and a distal shaft coupled to and extending distally from the push member. The distal shaft includes a shaft wall and a passageway. The shaft wall includes a helically-shaped proximal end and a distal end. The helically-shaped proximal end coils helically about a first central longitudinal axis of the passageway of the distal shaft. The helically-shaped proximal end of the shaft wall defines a helically-shaped entry port of the distal shaft. The distal shaft may include a helically-shaped collar coupled to the helically-shaped proximal end of the distal shaft, the collar defining the helically-shaped entry port of the distal shaft.