Abstract: A medical device, such as a guide wire, includes a first region having a first surface property, and a second region having a second surface property and located on a proximal end side of the first region. For example, in spite of a simple structure, a high friction region and a low friction region can be provided on the distal end side and the proximal end side respectively by controlling the surface properties of the first region and the second region, so that progression of prolapse can be controlled.

Abstract: A guide wire including a core shaft including a distal end portion having a pseudoelastic property, a tip joined to a distal end of the distal end portion of the core shaft, and an auxiliary wire that is arranged parallel to the distal end portion of the core shaft. The auxiliary wire has a distal end joined to the tip and a rear end joined to the core shaft. The auxiliary wire has a high flexibility, a high breaking strength, and a short breaking elongation compared to the distal end portion of the core shaft.

Abstract: 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.

Abstract: A guide wire insertion method for inserting a guide wire into a blood vessel having a main vessel and a side branch branched from the main vessel. The method includes providing a guide wire having a knuckle advance suppressing structure; inserting the guide wire into a main vessel of a blood vessel of a patient and pushing a distal end of the guide wire toward an affected part; after the distal end of the guide wire is caught by a side branch of the blood vessel, generating a knuckle at a distal end portion of the guide wire, and removing the distal end of the guide wire from the side branch, and pushing the distal end portion toward the affected part in the main vessel while maintaining the knuckle.

Abstract: A guide wire including a first core shaft made of a superelastic material, and a second core shaft made of a material more susceptible to plastic deformation than of the first core shaft and joined to a distal end side of the first core shaft on a proximal end side. On a joint part between the first core shaft and the second core shaft, the first core shaft and the second core shaft are adjacent to each other in a first direction. A flat portion where a length in the first direction in a transverse section is longer than a length in a second direction orthogonal to the first direction is formed on a distal end portion of the second core shaft.

Abstract: This metal wire for a medical device includes: a prescribed region having a coating film exhibiting at least one prescribed color; and a specific region having a coating film exhibiting at least one specific color that is different from the at least one prescribed color.

Abstract: A guide wire includes a core shaft and a coil body including a wire wound around the core shaft. The wire includes a long axis and a short axis in a transverse section. The coil body includes an inclined portion where an angle formed by the long axis of the wire and an axial line of the coil body is acute.

Abstract: A guide wire includes a core shaft including a distal end portion that is curved in a predetermined direction, a coil body covering the outer periphery of the core shaft, and a distal tip joining a distal end portion of the core shaft and a distal end portion of the coil body. The distal tip has a convex shape oriented toward a distal end side. In a cross section of the core shaft cut along a plane including the central axis, the distal tip includes a curve inner portion located on an inside of the curve of the distal end portion relative to the central axis of the core shaft and a curve outer portion located on an outside of the curve of the distal end portion relative to the central axis. A cross-sectional area of the curve inner portion is smaller than that of the curve outer portion.

Abstract: A guidewire comprises a core shaft, a coil body covering a distal end portion of the core shaft, and a coating agent covering an outer periphery of the coil body, wherein the coil body includes a distal coil body disposed on a distal side of the coil body, and a proximal coil body disposed on a proximal side of the distal coil body, a surface roughness of the proximal coil body is higher than a surface roughness of the distal coil body.

Abstract: A guide wire includes a core shaft including a distal end portion that is curved in a predetermined direction, a coil body covering the outer periphery of the core shaft, and a distal tip joining a distal end portion of the core shaft and a distal end portion of the coil body. The distal tip has a convex shape oriented toward a distal end side. In a cross section of the core shaft cut along a plane including the central axis, the distal tip includes a curve inner portion located on an inside of the curve of the distal end portion relative to the central axis of the core shaft and a curve outer portion located on an outside of the curve of the distal end portion relative to the central axis. A cross-sectional area of the curve inner portion is smaller than that of the curve outer portion.

Abstract: A driving force control system that controls a driving force in line with a driver's intension to propel a vehicle on a slippery road surface without wheel slip. A controller is configured to obtain individual relations of a slip ratio on a road surface to parameters including the driving force, a running resistance of the vehicle, and an accelerating force of the vehicle, and to control the driving force based on the obtained relations of the slip ratio to each of said parameters.

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 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 guide wire including a core shaft including a distal end portion having a pseudoelastic property, a tip joined to a distal end of the distal end portion of the core shaft, and an auxiliary wire that is arranged parallel to the distal end portion of the core shaft. The auxiliary wire has a distal end joined to the tip and a rear end joined to the core shaft. The auxiliary wire has a high flexibility, a high breaking strength, and a short breaking elongation compared to the distal end portion of the core shaft.

Abstract: A drive control system for a hybrid vehicle configured to prevent backward coasting on an uphill grade even when an engine torque cannot be delivered to drive wheels. When the hybrid vehicle is propelled by delivering engine torque to rear wheels on an uphill grade, the drive control system determines an occurrence of a failure in which the torque cannot be delivered from the engine to the rear wheels. If the occurrence of the failure is determined, the drive control system executes a hill hold control to deliver torque to establish a required drive force from a motor to front wheels while disengaging an engagement device.

Abstract: 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.

Abstract: A driving force control system that controls a driving force in line with a driver's intension to propel a vehicle on a slippery road surface without wheel slip. A controller is configured to obtain individual relations of a slip ratio on a road surface to parameters including the driving force, a running resistance of the vehicle, and an accelerating force of the vehicle, and to control the driving force based on the obtained relations of the slip ratio to each of said parameters.

Abstract: A driving force control system that allows a vehicle to climb uphill without stopping. A controller is configured to: calculate a slip ratio of a road surface, a driving force with respect to the slip ratio, and a running resistance including a grade resistance of the road surface, before the vehicle reaches a starting point of an upcoming uphill, determine whether the vehicle can climb the uphill all the way to the top based on the driving force and the running resistance, and execute a driver assisting control to instruct a driver to manipulate an accelerator in such a manner as to optimize the slip ratio to establish a predetermined driving force, if the vehicle can climb uphill all the way to the top.

Abstract: A guide wire includes a core shaft formed of superelastic metal, where the core shaft has a tapered portion having a diameter decreasing from its proximal end toward its distal end, an intermediate portion that is cylindrical and is adjacent to the proximal end of the tapered portion, and a proximal portion adjacent to a proximal end of the intermediate portion and having a maximum diameter larger than a diameter of the intermediate portion; a coil body covering at least a part of the intermediate portion and the tapered portion of the core shaft, the coil body having an outer diameter of 0.36 mm or less; and a distal tip disposed at a distal end of the coil body and forming a distal end of the guide wire, the diameter of the intermediate portion being 0.22 to 0.24 mm.

Abstract: A guide wire includes: a first core shaft made of a superelastic material, and a second core shaft made of a material more plastically deformable than the first core shaft and is joined to a distal end portion of the first core shaft. On the distal end portion to which the second core shaft is joined in the first core shaft, breaking elongation attributed to a tensile load is shorter compared to portions on a proximal end side with respect to the distal end portion.