Abstract: 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.

Abstract: Occurrence of a failure in unlocking of a wheel is mitigated, the force required for locking the wheel is reduced, and time required for locking the wheel is reduced. A wheel lock system includes: a body; a shaft member supported by the body so as to be rotatable around a rotation axis and having a recess formed in at least a part of an outer peripheral surface around the rotation axis; a wheel fixed to the shaft member to rotate together with the shaft member; and a lock mechanism that switches between an unlocked state permitting rotation of the wheel and a locked state restricting rotation of the wheel. The lock mechanism includes a linear body having a protrusion, and the linear body is arranged in the outer peripheral surface formed with the recess of the shaft member, so as to be able to press the protrusion.

Abstract: A light irradiation device having an elongated outer shape includes: an optical fiber for emitting light from its distal end, which has a curved part, in which the distal end is oriented in a direction intersecting with a longitudinal direction of the light irradiation device by the curved part; and a light transmitting holder that retains a shape of the curved part of the optical fiber. The optical fiber has a core, or has the core and an outer surface layer, and the holder has a refractive index smaller than a refractive index of the core or a refractive index of the outer surface layer of the optical fiber.

Abstract: A medical tube includes a tubular core layer and an outer layer arranged at an outer periphery of the core layer and having an outer peripheral surface substantially parallel to an axial direction of the medical tube. The core layer has a tubular inner core layer composed of a fluorine-based resin, and an outer core layer composed of a resin having a Young's modulus higher than that of the fluorine-based resin and arranged at an outer periphery of the inner core layer. The core layer has a specific configuration in which crest portions protruding toward a radially outer side of the medical tube and valley portions protruding toward a radially inner side of the medical tube are arranged repeatedly in the axial direction of the medical tube.

Abstract: A wire material for medical use made of stainless steel has a resilience rate of 96% or more after bending the wire material so that the ends of the wire material approach each other to strain the wire by a strain amount of 2%. Strain amount (%)=(R/(L?R))×100. R is a wire diameter of the wire material, and L is a distance between the ends when the wire material is bent so that the ends approach each other. The resilience rate (%)=(1??/180)×100. ? is an angle of intersection between two tangent lines extending from the ends of the wire material after bending.

Abstract: A vascular lesion model including a blood vessel portion and a lesion portion divided into a plurality of lesion regions having different hardness. The lesion portion including at least one type of lesion region among a first lesion region contacting a part of an inner periphery of the blood vessel portion in a cross section perpendicular to a longitudinal direction and having a shape extending from the part of the inner periphery toward a center of the lesion portion, a second lesion region having a solid shape separated from an outer periphery of the lesion portion, a third lesion region separated from both ends of the lesion portion in the longitudinal direction and occluding the blood vessel portion, and a plurality of fourth lesion regions separated from the inner periphery of the blood vessel portion in a cross section perpendicular to the longitudinal direction, and arranged separately from one another.

Abstract: A vascular model includes a hollow tubular first tube body, and a hollow tubular second tube body that covers an inner peripheral surface of the first tube body. The first tube body has an acoustic impedance higher than an acoustic impedance of the second tube body.

Abstract: A catheter having a shaft including a wire lumen, a sensor lumen that is arranged side by side with the wire lumen, a projection part that includes the wire lumen, projects to the more distal side than the distal end of the sensor lumen, and has a distal end opening in communication with the wire lumen at the distal end of the projection part, and a first notch that is formed on the more proximal end side than the projection part, and is in communication with the wire lumen. The first notch is formed on a side surface of the shaft, the side surface being positioned on the opposite side of the sensor lumen, and the shaft includes, in a section with the first notch, a bottom portion facing the first notch and a pair of side walls extending to the opposite side of the sensor lumen.

Abstract: 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.

Abstract: A balloon catheter includes a hollow shaft having a lumen through which an expansion liquid flows, and an expandable and contractible balloon arranged so as to cover at least a part of an outer periphery of the hollow shaft. The hollow shaft has an opening that communicates between the lumen and an inside of the balloon, and an outer peripheral surface of the hollow shaft has a groove extending across the opening and along the outer peripheral surface.

Abstract: Provided is a dilator capable of increasing the diameter of a hole formed on the wall of a digestive tract and the like while ensuring distal-end flexibility and maintaining pushability and torquability even when a shaft is longer and curved. A dilator includes a hollow shaft having an outer diameter that is smaller at a distal end than at a proximal end, and a grip portion connected to the proximal end of the shaft. A spirally-arranged protruding portion protruding outwardly is provided on an outer peripheral surface of the shaft. The spirally-arranged protruding portion has gaps between adjacent portions along a longitudinal axis of the shaft.

Abstract: A plasma ablation system includes a plasma guide wire having a conductive first electrode formed on a distal end portion, a catheter having a conductive second electrode formed on a distal end side and a lumen through which the plasma guide wire is inserted, and a radio frequency (RF) generator electrically connected to each of the plasma guide wire and the catheter to output a high frequency electric power to the first electrode and the second electrode. The plasma guide wire can ablate a living body tissue by discharge between the first electrode and the second electrode, and the RF generator outputs the high frequency electric power that is 50 W or higher and 100 W or lower during discharge and pulse-modulated to have a duty ratio of 7.4% or higher and 40.0% or lower.

Abstract: A catheter includes a hollow shaft; a distal end electrode provided on a distal end portion of the hollow shaft; a proximal end electrode provided on a proximal end portion of the hollow shaft, and which is electrically connected to the distal end electrode via the hollow shaft; and a connection portion which is capable of being attached to and detached from the proximal end electrode and which, by being attached to the proximal end electrode, electrically connects an external voltage output device and the proximal end electrode via a lead wire.

Abstract: An elongated medical device includes a first layer having a hollow cylindrical shape and containing a fluororesin having an adhesive functional group (adhesive resin) and a first colorant, and a second layer arranged in contact with an outer peripheral surface of the first layer and having a predetermined colored region formed of a second colorant having a color different from a color of the first colorant. The predetermined colored region is formed on a part of the outer peripheral surface of the first layer.

Abstract: A guide wire includes a core shaft having an elongated outer shape, a first coil body disposed to surround a distal end portion of the core shaft, a second coil body disposed radially outside from the first coil body, and a distal tip fixing a distal end of the core shaft and a distal end of the first coil body. In the longitudinal direction of the core shaft, a distal end of the second coil body is positioned between the distal end of the first coil body and a proximal end of the first coil body, a proximal end of the second coil body is positioned on the more proximal end side than the proximal end of the first coil body, and bending stiffness of the first coil body is smaller than bending stiffness of the second coil body.

Abstract: A measurement apparatus including: a static magnetic field applying part that applies a static magnetic field having a constant magnitude in a first direction to a measurement target; a plurality of current applying parts applying a plurality of AC currents oriented in a plurality of directions toward a portion of the measurement target via an electrode pair; a magnetic field detecting element that detects a magnitude of a magnetic field generated from the portion of the measurement target in response to the static magnetic field having the constant magnitude in the first direction and the plurality of AC currents; a calculating part for calculating impedance of the portion of the measurement target; and an internal information output part for generating information including an internal component of the measurement target.

Abstract: A guide wire includes a core shaft and a twisted wire coil body having a plurality of wires twisted together and arranged along an outer periphery of the core shaft. The twisted wire coil body includes a distal end portion including a distal end and a feature portion, and a proximal end portion, and has a smaller outer diameter in the feature portion than at the proximal end portion. Among the plurality of wires, an outermost wire having a longest distance to a center point of the core shaft in a transverse cross section of the twisted wire coil body in the feature portion, has a smaller cross-sectional area than a wire having a longest distance to the center point in a transverse cross section of the twisted wire coil body at the proximal end portion. An inner diameter of the twisted wire coil body is constant.

Abstract: A FPD navigation device includes an image acquiring portion that acquires, from a FPD (flat panel detector), a first image including an image of a target blood vessel taken at a first position, and a second image including an image of the target blood vessel taken at a second position different from the first position; a position information acquiring portion that acquires position information on the target blood vessel from the first image, the second image, position information on the first position, and position information on the second position; and a recommendation range output portion that outputs, from the position information on the target blood vessel, a FPD imaging position recommendation range representing a range of an imaging position of the FPD recommended for acquiring an image of the target blood vessel.

Abstract: A catheter comprises a tubular body having a lumen, a reinforcing body provided on an outer periphery of the tubular body, and a radiopaque marker member disposed along a circumferential direction of the reinforcing body. In the longitudinal axis direction of the tubular body, a distal end of the reinforcing body is positioned at the same site as a distal end of the marker member, or at a site further toward a distal end side. A distal end portion of the marker member is joined to the reinforcing body, and a portion other than the distal end portion of the marker member is not joined to the reinforcing body.

Abstract: An image display device includes circuitry configured to acquire, from a human body, three-dimensional image information on an inside of the human body including a biological tube using a plurality of ultrasonic sensors, specify a position, in the biological tube, where a width of a longitudinal cross-section of the biological tube is maximum using transverse cross-section information on the biological tube included in the three-dimensional image information, generate an image representing the longitudinal cross-section of the biological tube at the position specified, and output the image generated to a display.