One aspect provides a medical guidewire including a core wire extending from a proximal tip of a proximal end section to a distal tip of a distal end section. A polymer layer covers a perimeter surface of at least a portion of the distal end section, the polymer layer covering the distal tip and extending proximally to a proximal end portion defining a proximal edge. A strengthening feature is disposed about a perimeter surface of at least the core wire at the proximal end portion of the polymer layer, the strengthening feature beginning at a location proximally spaced from the proximal edge of the polymer layer and extending distally at least until the proximal edge of the polymer layer, the strengthening feature to prevent damage to the proximal end portion of the polymer layer.

A guide wire having good flexibility on a distal end portion, while ensuring a joining strength between a coil body and a core shaft is provided. The guide wire includes a core shaft, a coil body that covers an outer periphery of the core shaft, and a distal end side joint part that joins a distal end portion of the coil body with a distal end portion of the core shaft. The distal end side joint part is made of a resin material. The guidewire further includes a fixation part made of a metal material that joins the coil body with the core shaft on a proximal end side of the distal end side joint part.

The present disclosure relates to interventional devices such as catheters and guidewire devices having micro-fabricated features for providing flexibility while maintaining good torquability. An interventional device includes an elongated member having an arrangement of fenestrations which define a plurality of axially extending beams coupling a plurality of circumferentially extending rings. The fenestrations are arranged so that the resulting beams form a distributed, non-helical and non-linear pattern along the length of the elongated member. The pattern of fenestrations thereby minimizes or eliminates preferred bending axes.

A guide wire which is flexible in a distal portion and which can prevent occurrence of damage such as breakage and separation of a coil in the distal portion has an elongated core member and a tubular body located so as to cover a periphery of a distal portion of the core member. The tubular body is formed using a belt-shaped member wound in a spiral shape, and has an engagement portion which causes side portions adjacent in a longitudinal axis direction of the core member to engage with each other in the belt-shaped member.

A guide wire includes a core shaft, a coil wound around the core shaft, a distal-end joining region to which a distal end of the core shaft and a distal end of the coil are joined, and a proximal-end joining region to which a proximal end of the core shaft and a proximal end of the coil are joined, and the coil has a sparsely wound portion having a sparser coil pitch than other portions of the coil, the sparsely wound portion being disposed between the distal-end joining region and the proximal-end joining region.

An apparatus and method of manufacture includes a helical wire coil and a core wire. The core wire has a first wire portion and a second wire portion. The first wire portion of the core wire extends through the helical wire coil. The second wire portion of the core wire is intertwined with the first helical wire coil to fixedly secure the core wire relative to the first helical wire coil. The core wire is formed from a first material that is non-extensible. The core wire is fixedly secured relative to a distal portion of the helical wire coil such that the core wire inhibits longitudinal elongation of the helical wire coil along a longitudinal coil axis.

The disclosure provides a medical guidewire. The medical guidewire includes an equal-diameter fiber and a variable-diameter sleeve surrounding the equal-diameter fiber. The variable-diameter sleeve includes a shaping section, a supporting section, and a pushing section that are connected in sequence. The shaping section, the supporting section and the pushing section have outer diameters increased sequentially. An asymmetric structure is provided on the variable-diameter sleeve itself or the surround of the variable-diameter sleeve along the equal-diameter fiber. The medical guidewire provided by the disclosure has improved bending performance and operability, so that it is easy to manipulate the medical guidewire to enter blood vessels with a large opening angle. thereby improving the effect of minimally invasive interventional treatment.

Medical devices and systems for treating a stricture along the biliary and/or pancreatic tract are disclosed. An example medical device may include a guidewire for use along the biliary and/or pancreatic tract. The guidewire may include an elongate core member having a proximal end region and a distal end region. A coil member may be disposed along the distal end region. An actuation member may be coupled to the coil member. The actuation member may be configured to shift the coil member between a first configuration and a compressed configuration. The coil member may be configured to be advanced across a biliary and/or pancreatic stricture when in the compressed configuration. A sleeve may be disposed over the coil member.

A guidewire formed from a superelastic material has a proximal section and a distal section. In order to improve torque and pushability in the proximal section, a first wire is wound clockwise onto the proximal section to form a first coil and a second wire is wound counterclockwise onto the first coil to form a second coil.

The present disclosure is directed to multi-segment intraluminal guide wires including an elongate distal portion comprising a first metallic material (e.g., nitinol), an elongate proximal portion comprising a second metallic material (e.g., stainless steel). The distal and proximal portions may be directly joined together end to end by a solid-state weld joint. A diameter of the weld region surrounding the weld joint on either side of the weld joint may be reduced (e.g., ground down) relative to the diameter of the distal and proximal portions of the guide wire on either side of the weld region. A stiffness adjusting sleeve may be disposed over the weld joint so that a transition profile of bending stiffness across the weld region is gradual, rather than abrupt across the distal portion of the guide wire to the proximal portion of the guide wire. A polymer jacket may cover the sleeve and distal portion.