The invention relates generally to methods and systems for capturing, filtering, or retrieving obstructions or other particulates from a patient's vasculature. In one aspect, device for retrieving an obstruction from a patient is provided that includes an outer delivery shaft and an expandable basket movable between a collapsed configuration and an expanded configuration. The basket is configured to be in the collapsed configuration during delivery and in the expanded configuration during engagement and retrieval of the obstruction. A proximal end of the basket is configured to be centrally and pivotally coupled to the outer delivery shaft. The proximal end and/or a distal end of the basket is movable relative to each other such that a proximal portion of the expandable basket is invertible toward a distal portion of the basket to form a proximally oriented cavity in the expanded configuration to engage and retrieve the obstruction.

Medical devices as well as methods for making and using medical devices are disclosed. An example medical device may include a core wire having a proximal shaft portion and a distal shaft portion coupled to the proximal shaft portion. The proximal shaft portion may include a first material. The distal shaft portion may include an inner shaft formed from a second material and an outer shell disposed along an outer surface of the inner shaft. The outer shell may be formed of the first material.

A guidewire comprising a hydrophilic surface coating encasing a core and a metal coil along a longitudinal length of the hydrophilic surface coating to form a distal closed tip, the metal coil circumscribing the core along a predetermined length, the core extending longitudinally beyond the metal coil in both a proximal direction and a distal direction, wherein a proximal section of the guidewire includes a hydrophobic surface coating.

The disclosure relates to medical devices and methods of assembling medical devices, such as MRI-compatible interventional wireguides. An example of a wireguide includes a series of individual segments, a plurality of connectors, and a plurality of spacers. Each segment in the series of individual segments has a first end and a second end. Each connector of the plurality of connectors joins adjacent segments in the series of individual segments to one another such that a first end of a first segment and a second end of a second segment in the series of individual segments are attached to a connector of the plurality of connectors. A spacer of the plurality of spacers is disposed between each pair of adjacent segments in the series of individual segments. Each of the segments in the series of individual segments is electrically insulated from an adjacent segment in the series of individual segments.

A catheter includes a hollow shaft having a tip part decreasing in diameter in a direction of a distal end, and a coil body covering the hollow shaft. The tip part has a small diameter portion, a large diameter portion, and a tapered portion gradually increasing in diameter from the small diameter portion toward the large diameter portion. The coil body has a substantially cylindrical joint part at which an end portion of the coil body in the direction of the distal end is joined in the circumferential direction. The joint part is located over the tapered portion and/or the small diameter portion, and in a state in which the hollow shaft extends substantially linearly, the distance between an inner peripheral surface of the joint part and outer peripheral surfaces of the tapered portion and/or the small diameter portion increases in the direction of the distal end.

The invention relates generally to methods and systems for capturing, filtering, or retrieving obstructions or other particulates from a patient's vasculature. It may relate to integrated thrombectomy and filtering devices and methods of use. The methods and systems may be configured to remove obstructions such as clots or foreign body objects from a neurovascular vessel or other vasculature and/or provide protection from distal emboli. In one aspect, device for retrieving an obstruction from a patient is provided that includes an outer delivery shaft and an expandable basket movable between a collapsed configuration and an expanded configuration. The basket is configured to be in the collapsed configuration during delivery and in the expanded configuration during engagement and retrieval of the obstruction. A proximal end of the basket is configured to be centrally and pivotally coupled to the outer delivery shaft. The proximal end and/or a distal end of the basket is movable relative to each other such that a proximal portion of the expandable basket is invertible toward a distal portion of the basket to form a proximally oriented cavity in the expanded configuration to engage and retrieve the obstruction.

The disclosed medical device has high visibility on non-woven fabric having a color such as green, blue, or the like, excellent identifiability from other medical devices having a color such as green, blue, or the like, and high surface smoothness. The medical device comprises an elongated body and a resin layer for covering at least a proximal portion of the elongated body, in which the resin layer has a first layer which includes a first fluororesin, titanium oxide, and a dispersant, and a second layer which is formed on the first layer and includes a second fluororesin. The content of the titanium oxide is 30% by weight or more relative to the solid content of the first layer, and an acid value of the dispersant is 20 to 90 mg/KOH.

A guide wire of the present disclosure includes a core shaft having a distal end portion reducing in diameter, a coil body wound to cover the distal end portion, and a distal end fixing portion fixing the core shaft and the coil body to each other. The distal end portion includes a small diameter portion, a large diameter portion, and a tapered portion between the small diameter portion and the large diameter portion. The core shaft and the coil body are fixed at a portion excluding the tapered portion. A first bending rigidity FR1 of the large diameter portion, a second bending rigidity FR2 of the small diameter portion, and a length L of the tapered portion satisfy the following expressions (1) and (2). In the following expressions (1) and (2), the unit of L is mm (millimeter).
FR1/FR2≥10  (1)
1≤L≤3  (2)

A guide wire that includes a core shaft that is made of a first material, a coil that is provided to cover an outer periphery of the core shaft and is formed by twisting a first wire made of the first material and a plurality of second wires made of a second material different from the first material, and a distal end joint that joints a distal end of the core shaft and a distal end of the coil, and the distal end joint is made of the first material and is continuous from the distal end of the core shaft and the distal end of the first wire, and the distal end joint wraps the distal ends of the plurality of second wires.

A guide wire in which a distal end portion of the guide wire can be easily bent in a specific plane direction in shaping, is provided. A guide wire includes a core shaft having a maximum diameter in a cross section orthogonal to an axial direction of the core shaft and an orthogonal diameter in a direction orthogonal to a direction of the maximum diameter, the core shaft includes a first specific portion located on a distal end side of the core shaft and having an oblateness between 7% and 35%, where oblateness is defined as the difference between the maximum diameter and the orthogonal diameter divided by the maximum diameter. The first specific portion of the core shaft can be 5 mm or more in the axial direction.