Some systems, devices and methods detailed herein can include a guidewire equipped with one or more imaging sources and light sources positioned at a distal tip of the guidewire to provide medical imaging and illumination of a targeted body location.

A guidewire includes a wire body having a first wire arranged on a distal end side and a second wire arranged on a proximal end side of the first wire. A proximal end surface of the first wire and a distal end surface of the second wire are joined to each other to form a joint portion. An outer member is arranged on an outer peripheral side of the wire body and forms a tubular shape which covers the wire body at least from a distal end portion of the first wire to the joint portion. An inner member is arranged between an outer peripheral portion of the wire body and an inner peripheral portion of the outer member and covers the joint portion. The inner member is an inner coil formed by winding a wire for the inner member into a coil shape.

The disclosed technology includes a flow diverter comprising a lumen extending along a longitudinal axis from a proximal end to a distal end of the flow diverter. The flow diverter can comprise a plurality of manifolds, each manifold comprising a plurality of fluid passageways, each fluid passageway extending from the lumen to an exterior of the flow diverter. The flow diverter can further comprise a plurality of annular ridges disposed around the lumen between the proximal end and the distal end of the flow diverter. Each manifold of the plurality of manifolds can be disposed between adjacent annular ridges of the plurality of annular ridges.

Devices, systems, and methods for a combination guidewire and tome shaft comprising three wires. The upper wire is manipulated to actively steer the shaft, while the lower wire creates a bowed region for cutting tissue. Insulating sheaths may cover the end of the shaft other than the bowed region of the lower wire. A voltage source allows electrification of the lower wire during cutting.

Provided is a guide wire including a wire extending in a longitudinal direction of the guide wire, in which the wire has a groove portion including helical grooves formed on an outer circumference of the wire along a helical path, each of the helical grooves has one or more bridge portions per circumference, and the bridge portion is a portion where a groove is not continuous or a groove depth is or less of a maximum depth per circumference.

A guidewire having a modified surface to reduce drag force between the outer surface of the guidewire and an inner surface of the catheter lumen. Preloaded catheter systems include a guidewire disposed within a lumen of the catheter. The guidewire is equal to, or slightly smaller than an inner diameter of the catheter lumen to impart columnar strength to the catheter during placement. However, due to increase contact surface area between the guidewire and the catheter lumen, the guidewire can stick within catheter lumen requiring increase force to slide the guidewire relative to the catheter. Surface modifications on the guidewire can reduce the contact surface are between the guidewire and catheter resulting in a reduced drag force therebetween. A plurality of longitudinal grooves, disposed in a regular or irregular pattern, and reduce drag force without affecting the flexible properties of the guidewire.

A guide wire is disclosed for guiding a tubular elongated body to be inserted into a living body can include: an elongated shaft portion that has flexibility; a puncture portion that is disposed at a distal end portion of the shaft portion and forms a hole in a biological tissue; and a cover portion that is formed of a wire member wound in a spiral shape, has a contraction portion that is contractible, and covers the puncture portion. The contraction portion is capable of causing the puncture portion to protrude from the cover portion by contracting the contraction portion in a linear state. When the contraction portion is in a curved state, the contraction portion is restricted in contraction so that the puncture portion does not protrude from the cover portion by contact of adjacent wire members on a concave side.

A medical device includes an elongated main body part and a leading portion connected to a distal end of the main body part. The leading portion has a first end portion located outward of an outer peripheral surface of the main body part.

A cardiac guidewire (20) is provided that is advanceable to a target cardiac site (10). The cardiac guidewire (20) is shaped so as to define an elongate portion (22), which is straight when unconstrained, and a spiral distal portion (24), which extends from and is supported by a distal end (26) of the elongate portion (22). The cardiac guidewire (20) is configured such that the spiral distal portion (24), when in an unconstrained resting state, is shaped as a spiral (30) that (a) spirals radially outward at an increasing distance from the distal end (26) of the elongate portion (22) so as to define an outer turn (32), and (b) has a zero or non-zero height. The cardiac guidewire (20) is further configured such that pushing of the elongate portion (22) in a distal direction (34), when the outer turn (32) of the spiral (30) engages cardiac tissue (36) at the target cardiac site (10), changes the height of the spiral (30) and deforms the spiral (30). Other embodiments are also described.

A medical device configured to create a lubricating barrier between two surfaces to reduce frictional forces, which may facilitate movement of an elongated member with respect to a device. In some examples, a medical device may include an elongated member including a sidewall defining a lumen, where the elongated member includes a perforated section with a plurality of holes that extend through the sidewall. A device may include a connector configured to connect an open end of the lumen to a fluid transfer device to receive lubricating fluid.