ASAHI INTECC CO., LTD.

Embodiments of the present disclosure relate to simulation of blood vessels to visualize and quantify forces applied to the blood vessels during procedures using a system that allows visualization of endovascular procedures. An example blood vessel simulator of the present disclosure may include a vascular model system including: a base; an attachment point; a tube attached to the attachment point; a sensor, where the attachment point is attached to the sensor, the sensor is mounted to the base, and the sensor is configured to detect a force exerted on the tube from a guide wire traveling within the tube; a camera, wherein the camera is positioned to capture real time images of the base, the attachment point, and the tube; and a controller configured to generate a visual output of the real time images with an indication of the force exerted on the tube from the guide wire.

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.

Multiple approaches to incorporating multiple conductors on a guidewire by building the multiple conductor traces of variable sizes and material compositions on separate insulating layers are described. The approaches described in the invention facilitate ease of assembly of sensors to the guidewire or catheter element. This approach is particularly useful in scenarios where electrical or mechanical properties of the device need to be altered in specific sections to either enhance device performance and reliability (e.g. selective abrasion resistance), or facilitate ease of assembly (e.g. soldering or connection ease), or in some instances achieve desired electrical characteristics (e.g. impedance). The desired properties are incorporated into the same device requiring an innovative approach to forming signal wires in an otherwise tight space without impacting the primary mechanical performance of the devices.

An elongated medical appliance includes: an elongated main body part including a first portion and a second portion arranged closer to a proximal end side than the first portion; and a hydrophilic coating layer arranged outside the main body part, and a surface shape of the hydrophilic coating layer located outside the first portion is different from that of the hydrophilic coating layer located outside the second portion. An elongated medical appliance is produced by forming a hydrophilic coating layer outside an elongated main body part including a first portion and a second portion arranged closer to a proximal end side than the first portion such that a surface shape of a portion located outside the first portion is different from that of a portion located outside the second portion. A method for producing an elongated medical appliance, including forming a hydrophilic coating layer outside an elongated main body part.

A medical device includes an endoscope and an endoscopic treatment instrument. An insertion portion of the endoscope includes a treatment instrument lumen and a curved part. The endoscopic treatment instrument includes a tube including a knife wire lumen, a knife wire housed in the knife wire lumen, and a support member. The knife wire includes a first wire part including an exposed part, and a second wire part. In a state in which the endoscopic treatment instrument is inserted into the treatment instrument lumen and a portion of the knife wire that extends a predetermined distance from a position of a distal end of the exposed part exposed from the tube to a proximal end side is projected from an opening in the insertion portion, a distal end of the second wire part is located distally relative to a proximal end of the curved part.

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.

A torque coil (two-layer coil structure) of the disclosed embodiments includes an inner coil formed by spirally winding metal wire, and an outer coil arranged to be in close contact with the outer periphery of the inner coil and formed by spirally winding metal wire. A winding direction of the inner coil and a winding direction of the outer coil are opposite from each other, and when the torque coil is twisted in the circumferential direction in which the diameter of the inner coil is increased, a change amount of the diameter of the outer coil is larger than a change amount of the diameter of the inner coil. The two-layer coil structure has high twisting rigidity, thus suppressing the occurrence of kinks due to rotational resistance.

A mold can include two chucks and two or more central mold parts that are configured to be removably coupled to the chucks such that the central mold parts extend between the chucks. When the central mold parts are coupled to the chucks, the central mold parts and the chucks can define a mold cavity including a gauge-forming portion and two shoulder-forming portions. The gauge-forming portion can be defined by the central mold parts and can have a first transverse dimension. The shoulder-forming portions can each be defined by a respective one of the chucks and have a second transverse dimension that is at least 1.5 times the first transverse dimension.

A medical device 1 includes a core shaft, an outer coil body formed by winding a wire, and a distal end fixed portion at which a distal end of the core shaft and the outer coil body are fixed to each other. The outer coil body includes a loosely wound portion with a gap between the adjacent wires w 1 along the longitudinal axis direction of the core shaft, and the loosely wound portion of the outer coil body satisfies the following formulas (1) and (2): in the formulas (1) and (2), D represents the effective diameter of the outer coil body, d represents the wire diameter of the outer coil body, and Pa represents a pitch representative value of the wire w 1 of the outer coil body. 3.5 ≤ D / d ≤ 6.5 ( 1 ) 1 < P ⁢ a ≤ 3. ( 2 )

Embodiments of the present disclosure relate to a sensor guidewire and methods for fabricating and using the same. An example sensor guide wire includes a core wire spanning between a first end and a second end, the first end and the second defining a length of the sensor guide wire; a plurality of wires in a helical arrangement around the core wire, wherein: the helical arrangement extending along at least a subset of a length of the core wire; a plurality of electrodes spaced apart from one another along the helical arrangement, wherein: a respective electrode is configured to cover a respective portion of the helical arrangement along the length of the sensor guide wire; the electrode is connected to one of the plurality of wires to enable conduction of signal from the electrode to the wire; and the respective electrode and the wire define an electrophysiological sensor.