Abstract: A surgery assistance device includes a true lumen information acquisition unit that acquires three dimensional position information of a true lumen existing in a target blood vessel, a true lumen image generation unit that acquires an angiographic image of the target blood vessel from a flat panel detector (FPD) arranged at a first imaging position and generates a true lumen image representing the true lumen at a position and in a posture corresponding to the angiographic image by using position information of the first imaging position and three dimensional position information of the true lumen, and an image composition unit that generates a composite image by compositing the angiographic image and the true lumen image and outputs the composite image.

Abstract: A plasma guide wire includes a conductive core shaft configured to be connected to a high-frequency generator, a conductive coil body that surrounds a part of the core shaft on a distal end side of the core shaft, and a distal tip that includes a conductive material and fixes a distal end of the core shaft and a distal end of the coil body, the distal tip being configured to receive a high frequency wave from the high-frequency generator via the core shaft. An outer surface of the distal tip includes (i) a proximal end side region located on a side of the coil body and (ii) a distal end side region located distally relative to the proximal end side region. The distal end side region has an electric resistance value that is lower than an electric resistance value of the proximal end side region.

Abstract: A guide wire includes a core shaft having a distal end portion stepwisely decreasing in diameter, an inner coil body covering at least a part of an outer periphery of the distal end portion, an outer coil body covering an outer periphery of the inner coil body, and a distal end fixing portion that fixes distal ends of the core shaft. The distal end portion includes a small diameter portion, a large diameter portion inside the inner coil body and the outer coil body further in the proximal end direction than the small diameter portion and having a larger diameter than that of the small diameter portion, and a tapered portion that increases in diameter from the small diameter portion toward the large diameter portion. A radiopaque marker is on an outer peripheral surface of the tapered portion. A gap is between the radiopaque marker and the inner coil body.

Abstract: A plasma guide wire includes a guide wire main body, a first tube that is made of an insulating resin and covers a distal end side of the guide wire main body, a second tube that is made of an insulating resin and covers a proximal end side of the guide wire main body, and a third tube that is made of an insulating resin, covers an intermediate portion of the guide wire main body located between the distal end side and the proximal end side, has a distal end portion joined to a proximal end portion of the first tube, and has a proximal end portion joined to a distal end portion of the second tube. Any one or more of the first tube, the second tube, and the third tube forms a gas layer filled with gas, in conjunction with the guide wire main body.

Abstract: A guide wire includes a core shaft having a distal end portion stepwisely decreasing in diameter, an inner coil body covering at least a part of an outer periphery of the distal end portion, an outer coil body covering an outer periphery of the inner coil body, and a distal end fixing portion that fixes distal ends of the core shaft. The distal end portion includes a small diameter portion, a large diameter portion inside the inner coil body and the outer coil body further in the proximal end direction than the small diameter portion and having a larger diameter than that of the small diameter portion, and a tapered portion that increases in diameter from the small diameter portion toward the large diameter portion. A radiopaque marker is on an outer peripheral surface of the tapered portion. A gap is between the radiopaque marker and the inner coil body.