A guidewire includes: a shaft having a proximal end, a distal end, and a body extending from the proximal end to the distal end; a blunt tip; and a sleeve; wherein the body of the shaft comprises at least a segment that is surrounded by the sleeve, the segment coupled to the blunt tip; and wherein the segment of the body of the shaft comprises a flat portion having one or more openings extending through a thickness of the flat portion.

A medical guidewire system including an inner member having an outer diameter and an outer member having an inner diameter, the inner diameter being larger than the outer diameter. The inner and outer members are relatively slidable to adjust a stiffness of the guidewire system. The lumen of the outer member forms a gap for fluid flow therethrough. A connector to the inner member and a fluid infusion channel communicating with the gap for injection of fluid through the gap to exit a distal portion of the outer member.

In the present disclosure, embodiments include flaring tip microcatheters, methods of deploying flaring tip microcatheters, and embolization treatment methods. The flaring tip microcatheter may include a hollow shaft having a shaft lumen defined therein, a core disposed within the shaft lumen, and a tip including at least two petals affixed to a distal end of the core, the at least two petals including at least two wires wherein the core is hollow and defines a core lumen. The at least two wires may be configured to pull the at least two petals to form a flared configuration of the tip. The flared configuration of the tip may allow for laminar flow of a therapeutic agent distally from the tip.

A medical device comprising a handle including a handle body and an actuator, and a shaft extending distally from the handle body, wherein the shaft comprises of a shape memory material, wherein the shaft includes a proximal section and a distal section, the proximal section having a first austenitic finish temperature and the distal section having a second austenitic finish temperature, and wherein the first austenitic finish temperature is lower than the second austenitic finish temperature.

A method and device for positioning an expandable support in a blood vessel is disclosed herein. The device may include a handle, a catheter assembly, a core wire, and an expandable support. The expandable support may be used to position the device relative to the arteriotomy, as well as to provide temporary hemostasis. The expandable support may be attached to the catheter assembly at a first end, and to the core wire at a second end to optimize the width of the expandable support based on the function being performed by the expandable support at a given time. The catheter assembly may be able to move relative to the handle and the core wire, thereby moving the first end of the expandable support relative to the handle and the core wire.

A wire guide for feeding a medical catheter through the body passage of a patient to a distant target site within the body has a variably flexible distal portion. The distal portion facilitates threading the guidewire in a tortuous path through acute bends at branch junctions in the body passages of the patient. The wire guide end is able to feed into very delicate vessels such as ventricles of the brain and the spinal canal without puncturing the wall or damaging organs.

One aspect is a medical guidewire including a core wire with a proximal end extending out to a distal end and a resilient portion coupled to the distal end of the core wire at a distal tip section of the guidewire. The resilient portion includes a superelastic material.

Guidewires having conductive elements are described where in one variation, the guidewire may be formed by disposing an insulative layer upon a surface of the guidewire core, and printing one or more conductive traces directly upon a surface of the insulative layer.

A guide wire includes an elongated core wire possessing a distal portion at which is located a reshaping portion that is configured to be reshaped. The reshaping portion includes a first material portion made of a first material and a second material portion which is made of a second material different than the first material. The first material portion is joined to the second material portion at a joint surface which extends in the longitudinal direction of the core wire.

An elongate body extending from a proximal end to a distal end includes a core comprising an amorphous metal alloy and includes a sheath that comprises a crystalline metallic material. The sheath surrounds the core.