Abstract: A catheter includes: a shaft to be inserted into a blood vessel, the shaft being flexible and having a tubular shape. The shaft comprises: a light emitting portion that is located at a distal end portion of the shaft and is configured to emit near-infrared light by being irradiated with light, and a non-light emitting portion that extends from the light emitting portion toward a proximal end side of the shaft and does not emit the near-infrared light. A length of the light emitting portion in an extending direction of the shaft is six times or less an outer diameter of the non-light emitting portion in an extending direction of the shaft.

Abstract: A blood vessel visualization apparatus, a blood vessel puncture system, and an observation window member include an observation window that contains a wavelength conversion material for converting near infrared light into visible light, and that is configured to visualize an image of the near infrared light that has been radiated from a light source that irradiates with near infrared light a visualization target site at which a blood vessel of a living body is visualized, and that has then passed through the visualization target site.

Abstract: A blood vessel visualization apparatus for visualizing a blood vessel inside a living body with light that has been transmitted through the living body includes: an irradiation unit configured to emit light from a contact portion with skin of the living body, the irradiation unit including: a fixing portion configured to be fixed to a target site of the living body, wherein the fixing portion includes a surface configured to contact the skin of the living body, and a plurality of light sources located in a light source arrangement area at the surface of the fixing portion that is configured to contact the skin of the living body. A brightness and/or a light distribution angle of respective ones of the light sources differ according to positions of the light sources in the light source arrangement area.

Abstract: A blood vessel visualization apparatus, a blood vessel puncture system, and an observation window member include: light sources that irradiate with near infrared light a visualization target site; an observation window that contains a wavelength conversion material for converting the near infrared light into visible light; a frame member that holds the observation window; and support members that support the frame member apart from the visualization target site. The observation window visualizes an image of near infrared light radiated from the light sources and reflected by the visualization target site.

Abstract: There is provided a skin foam-in-place foamed article comprising a pad (15) and a bag-like outer material (20) covering the pad (15). The outer material (20) has a top layer (21) and a liner layer (22) made of a foamed resin. The liner layer (22) has a closed cell structure. A pad-side skin layer (27a) having a density higher than that of a bulk layer (26) is provided on the liner layer (22), on a side of the pad (15). A corona treatment is applied to the pad-side skin layer (27a).

Abstract: A medical puncture needle includes: a metal needle body formed in a tubular shape, the needle body including: a blade surface located at a distal end portion of the needle body, a planar reflection portion located at an inner surface of the needle body and configured to reflect light, and a transmission window located proximal of the blade surface and configured to transmit reflected light reflected by the planar reflection portion.

Abstract: A medical puncture needle includes: a metal needle body formed in a tubular shape and including: a blade surface formed at a distal end portion of the needle body, a first transmission window configured to transmit light, and a second transmission window configured to transmit light transmitted through the first transmission window. The second transmission window is located on a proximal end side relative to the blade surface. The first transmission window and the second transmission window are shifted from each other in a circumferential direction of the needle body.

Abstract: A catheter is provided that includes a catheter body, a catheter hub, and a securing member disposed in the catheter hub to clamp the catheter between the securing member and the catheter hub. The securing member has an outer peripheral surface making contact with and stretching an inner peripheral surface of the catheter body. The catheter includes a recessed relief portion into which a thickness of the catheter body is inserted, the relief portion being partially provided circumferentially in an inner peripheral surface of the catheter hub.

Abstract: A catheter assembly includes: a catheter having an inner cavity extending along a center axis of the catheter, the catheter comprising, on a distal side, a tapered portion that is tapered in a distal direction; and an inner needle retractably located in the inner cavity. The inner needle comprises, on a distal side, a blade surface that is inclined with respect to a center axis of the inner needle. The tapered portion covers a proximal end portion of the blade surface in an assembled state in which the inner needle is located in the inner cavity, and an inner shape of a distal-most end of the tapered portion conforms to the blade surface.

Abstract: A catheter assembly includes: a catheter having a lumen; a catheter hub located at a proximal end of the catheter and having a hollow portion that communicates with the lumen; and a valve body located in the catheter hub, wherein the valve body is an monolithic structure including: a fixed portion fixed to the catheter hub, a deformable portion continuous with the fixed portion and having a slit that is openable and closable, and a pusher portion extending from the deformable portion in a proximal direction. The pusher portion is configured to be pushed in a distal direction by a connector inserted into the hollow portion from a proximal end of the catheter hub to deform the deformable portion and open the slit.

Abstract: A catheter assembly includes: a catheter having an inner cavity; and an inner needle retractably located in the inner cavity of the catheter. The inner needle includes: a barrel, a blade surface located distal of the barrel and being inclined with respect to a center axis of the inner needle, and an inner needle side locking surface located at least at a portion of an outer surface linking the barrel with the blade surface. An inner surface of the catheter includes a catheter side locking surface in contact with the inner needle side locking surface such that relative movement of the catheter in a proximal direction with respect to the inner needle is restricted.

Abstract: There is provided a skin foam-in-place foamed article comprising a pad (15) and a bag-like outer material (20) covering the pad (15). The outer material (20) has a top layer (21) and a liner layer (22) made of a foamed resin. The liner layer (22) has a closed cell structure. A pad-side skin layer (27a) having a density higher than that of a bulk layer (26) is provided on the liner layer (22), on a side of the pad (15). A corona treatment is applied to the pad-side skin layer (27a).

Abstract: A catheter is provided that includes a catheter body, a catheter hub, and a securing member disposed in the catheter hub to clamp the catheter between the securing member and the catheter hub. The securing member has an outer peripheral surface making contact with and stretching an inner peripheral surface of the catheter body. The catheter includes a recessed relief portion into which a thickness of the catheter body is inserted, the relief portion being partially provided circumferentially in an inner peripheral surface of the catheter hub.

Abstract: A protection device including: (i) a protection component having a first thermal fuse and a resistive body, the resistive body being supplied with a current in an abnormal state to generate heat, the heat activating the first thermal fuse to cut off the current; (ii) a PTC component; and (iii) a second thermal fuse, the second thermal fuse being electrically connected in series to the PTC component, the first thermal fuse of the protection component being electrically connected in parallel to the PTC component and to the second thermal fuse, and the protection component being activated in the abnormal state so that the PTC component trips to generate heat, the heat blowing the second thermal fuse.

Abstract: The present invention proposes a protection device which has a large rated voltage and a large rated current, which is capable of sufficiently suppressing arc generation during activation, and which is also capable of providing suitable protection against overcurrent due to short circuiting or the like of a main circuit. The protection device of the present invention includes (i) a protection element which includes a first thermal fuse and a resistor, and in which the resistor generates heat as a result of current passing through the resistor when there are abnormalities, and the first thermal fuse is activated due to this heat and interrupts the current, (ii) a PTC element and a second thermal fuse which are electrically connected in parallel to the first thermal fuse and which are electrically connected in series to each other, and (iii) a current fuse which is electrically connected in series to the first thermal fuse.

Abstract: A catheter assembly includes: a catheter having an inner cavity; and an inner needle retractably located in the inner cavity of the catheter. The inner needle includes: a barrel, a blade surface located distal of the barrel and being inclined with respect to a center axis of the inner needle, and an inner needle side locking surface located at least at a portion of an outer surface linking the barrel with the blade surface. An inner surface of the catheter includes a catheter side locking surface in contact with the inner needle side locking surface such that relative movement of the catheter in a proximal direction with respect to the inner needle is restricted.

Abstract: A catheter assembly includes: a catheter having an inner cavity extending along a center axis of the catheter, the catheter comprising, on a distal side, a tapered portion that is tapered in a distal direction; and an inner needle retractably located in the inner cavity. The inner needle comprises, on a distal side, a blade surface that is inclined with respect to a center axis of the inner needle. The tapered portion covers a proximal end portion of the blade surface in an assembled state in which the inner needle is located in the inner cavity, and an inner shape of a distal-most end of the tapered portion conforms to the blade surface.

Abstract: The present invention provides a protection device which includes a laminar element 16 which is formed of an insulation resin and has at least one throughhole; electrically conductive metal thin layers 22 and 28 which are positioned on each of main surfaces of the laminar element, and a fuse layer 40 which is positioned on a side surface defining said at least one throughhole and electrically connects the electrically conductive metal thin layers. The fuse layer includes a first metal layer 41 consisting of a metal having a higher melting point and a second metal layer 42 consisting of a metal having a lower melting point. The protection device of the present invention allows a larger amount of a current to flow therethrough and can provide a protection from an excessive current.

Abstract: The present invention provides a protection device which includes a laminar element 16 which is formed of an insulation resin and has at least one throughhole; electrically conductive metal thin layers 22 and 28 which are positioned on each of main surfaces of the laminar element, and a fuse layer 40 which is positioned on a side surface defining said at least one throughhole and electrically connects the electrically conductive metal thin layers. The fuse layer includes a first metal layer 41 consisting of a metal having a higher melting point and a second metal layer 42 consisting of a metal having a lower melting point. The protection device of the present invention allows a larger amount of a current to flow therethrough and can provide a protection from an excessive current.

Abstract: An injection needle assembly includes an injection needle, a fitting portion, and a hub. The fitting portion is formed into a cylindrical shape and has one end serving as a fitting opening. The fitting portion includes a female taper shape in which an inner diameter of a cylindrical hole of the fitting portion becomes smaller toward an inner side. The hub includes the fitting portion for holding the injection needle. The injection needle assembly is used such that the female taper shape of the fitting portion is fitted to a drug discharge tube, which has a male taper shape in which an outer diameter of a cylinder becomes smaller toward a tip. When the male taper shape of the drug discharge tube has a taper ratio of N/100, the female taper shape of the fitting portion 12 is formed to have a taper ratio of M/100, where M>N.