Abstract: Resin-coated wire is capable of moving forward inside a drug solution-containing lumen of a catheter containing a drug solution, and thereby pushing out the drug solution from a distal end of the catheter. The resin-coated wire includes a wire, and a coating made of resin coating the wire. The coating has a distal end coating and a proximal end coating. The distal end coating is formed of a first resin material and coats a first part, which is a distal end portion of the wire. The proximal end coating is formed of a second resin material and coats a second part adjacent to a proximal end side of the first part of the wire. The first resin material has a higher affinity for water than the second resin material.

Abstract: A medical ultrasonic sensor array includes a plurality of ultrasonic sensors having a plurality of first electrode plates, a plurality of piezoelectric elements, and a second electrode plate. Each of the ultrasonic sensors has a first electrode plate and a piezoelectric element sandwiched between the second electrode plate and the first electrode plate. Each first electrode plate of each ultrasonic sensor is separated from each other first electrode plate of each other ultrasonic sensor. The second electrode plate is a single body electrode plate shared by the plurality of the ultrasonic sensors. The second electrode plate includes a plurality of cavities, each cavity being formed in a surface of the second electrode plate at which the piezoelectric elements connect to the second electrode plate at a position between connection regions connecting a respective pair of the piezoelectric elements to the second electrode plate.

Abstract: A guide wire includes a core shaft, a coil body curved from the proximal end side to the distal end side of the guide wire, and a fixing portion fixing the core shaft to the coil body. The core shaft includes a first contact part in contact with an inner surface of the coil body on an opposite side to the curving direction, and a second contact part in contact with the inner surface of the coil body in the curving direction, at a position closer to the distal end than the first contact part. The fixing portion includes a first fixing portion fixing the core shaft to the coil body at a position closer to the proximal end than the first contact part, and a second fixing portion fixing the core shaft to the coil body at a position closer to the distal end than the second contact part.

Abstract: A guide wire including a core shaft that has a distal end portion and a proximal end portion. The distal end portion includes a first region having a flat shape in cross section, and a second region having a circular shape in cross section and having flexural rigidity higher than that of the first region. The first region and the second region are provided in the distal end portion in the stated order from a most distal end side, and at least two or more sets of the first region and the second region are provided at the distal end portion. Flat directions of the respective first regions are all identical.

Abstract: A catheter includes a hollow catheter shaft, and a distal tip connected to a distal end portion of the catheter shaft. A recess is formed in the distal end portion of the catheter shaft, and a proximal end portion of the distal tip is inserted into the recess. According to this catheter, joint strength of the distal tip and the catheter shaft can be enhanced.

Abstract: A catheter that can have improved strength includes a first tube including a first lumen, and a second tube including a second lumen. The first tube includes an inner layer that is the innermost layer of the first tube, an outer layer surrounding the inner layer, and a reinforcing layer sandwiched between the inner layer and the outer layer.

Abstract: A catheter includes a shaft having a lumen inside the shaft, and a reinforcing body that is inserted in the shaft and extended along the lumen. The reinforcing body includes a first portion (main body part), and a second portion (distal end portion) that is positioned on the more distal end side than the first portion while being at a distal end portion of the shaft and has larger direct or indirect joining force relative to the shaft than the first portion. Such a catheter is able to increase the breaking strength.

Abstract: A medical system includes a computer having a CPU that is programmed to acquire distal end rotation information regarding a rotation movement of a distal end part of a medical device to be inserted into a living body, and acquire proximal end rotation information regarding a rotation movement of a proximal end part of the medical device to be operated by an operator.

Abstract: A catheter device includes a first catheter. The first catheter includes a first catheter shaft and an operating part that is attached to a proximal end portion of the first catheter shaft and operates the first catheter shaft. The operating part includes a rotary operation section that rotates the first catheter shaft about a central axis of the first catheter shaft, and a bending operation section that bends a distal end portion of the first catheter shaft.

Abstract: A human body simulation device includes a heart model simulating a heart, a beat portion for causing the heart model to beat, a blood vessel model simulating a blood vessel, a pulsation portion for sending a pulsated fluid into the blood vessel model, and a control portion for changing a beat rate of the beat portion and a pulsation rate of the pulsation portion depending on a prescribed heart rate.

Abstract: The puncturing device includes an inner portion, an outer peripheral portion, and a protruding portion. The inner portion has a puncturing needle lumen that extends from a distal end to a proximal end. The outer peripheral portion extends along a central axis of the inner portion and surrounds the inner portion. The protruding portion includes at least two protruding pieces arranged around the central axis. Each of the at least two protruding pieces is configured to be shiftable between a tapered state where a distal end of the protruding piece is closer to the central axis than a proximal end of the protruding piece, and a straight state where a distance from the distal end of the protruding piece to the central axis is equal to a distance from the proximal end of the protruding piece to the central axis.

Abstract: A dilator that includes a shaft and a spirally-arranged protruding portion. The shaft includes a tapered section, a distal end section, and a body section. The spirally-arranged protruding portion includes spirally-arranged protruding sections provided on outer peripheral surfaces of each of the tapered section, the distal end section, and the body section, and gaps between adjacent spirally-arranged protruding sections along an axial direction of the shaft. At least one of a height t of the spirally-arranged protruding portion at a first location gradually decreases toward a distal end side and a height of the spirally-arranged protruding portion at a second location gradually decreases toward a proximal end side.

Abstract: The guide wire includes a core shaft, a coil body with a wire helically wound around the outer periphery of the core shaft, and a coating layer provided on the outer periphery of the coil body. The coating layer has a peak portion protruding in the outer peripheral direction of the guide wire in a swollen state. On a cross-section including a central axis of the coil body, an apex of the peak portion is present at a position on a proximal end side of a first virtual straight line that extends through a central point of a first transverse section of the wire and is perpendicular to the central axis and at a position on a distal end side of a second virtual straight line that extends through a central point of second transverse section of the wire and is perpendicular to the central axis.

Abstract: A wire feeding device includes a grip portion that grips and releases the wire and moves in the distal end direction and a proximal end direction; a push spring that biases the grip portion toward the distal end direction; and a slider and a hook that deform the push spring and increase a biasing force. When the deformation of the push spring by the slider and the hook is released, the wire gripped by the grip portion is fed to the distal end direction by the biasing force from the push spring, and the wire feeding device is configured to be operated in (i) a first mode in which the wire is continuously fed in the distal end direction according to a first predetermined operation and (ii) a second mode in which the wire is fed once in the distal end direction according to a second predetermined operation.

Abstract: A dilator that includes a hollow shaft including a tapered section having a diameter increasing from a distal end toward a proximal end, and a spirally-arranged protruding portion provided on an outer peripheral surface of the hollow shaft and including spirally-arranged protruding sections and gaps between adjacent spirally-arranged protruding sections along an axial direction of the hollow shaft. The spirally-arranged protruding portion includes an apex section having the greatest height from the outer peripheral surface in a transverse cross-section thereof, and a side surface section facing outward and extending from the apex section toward the outer peripheral surface. The side surface section includes an inclined surface inclined substantially linearly toward at least one of the distal and proximal end direction between the outer peripheral surface and the apex section in the transverse cross-section of the spirally-arranged protruding portion.

Abstract: A vascular lesion model includes a first lesion portion formed of a polymer material, and a second lesion portion provided in contact with the first lesion portion. A part of the second lesion portion including a surface in contact with the first lesion portion is formed of a material having an acoustic impedance higher than an acoustic impedance of the first lesion portion, and the second lesion portion simulates a calcified lesion in an ultrasonic image.

Abstract: A guide wire that is durable against twisting stress includes a first shaft and a second shaft having a distal end joined to a proximal end of the first shaft. The second shaft is formed of a material exhibiting an elastic modulus higher than that of a material forming the first shaft. The second shaft includes a variable hardness portion including a first portion having a hardness that gradually decreases from a distal end to a proximal end of the first portion, and a second portion arranged proximally of the first portion, and exhibiting a hardness lower than the hardness of the distal end of the first portion. The length of the variable hardness portion in the axial direction of the guide wire is longer than the diameter of the second shaft.

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.