Abstract: An injection needle includes a needle tube having a proximal end and a distal end, and an edge surface provided at the distal end of the needle tube. The edge surface includes a first ground facet, a second ground facet, and a third ground facet. The first ground facet is located at a position proximal to the second ground facet and the third ground facet. The second ground facet and the third ground facet converge to form a needle point that is offset from a central plane that perpendicularly crosses the first ground facet and includes a central axis of the needle tube. A length of the edge surface is 0.6 to 2.2 mm. An outside diameter of the needle tube is 0.18 to 0.6 mm. A ratio of the outside diameter of the needle tube to the length of the edge surface is 0.265 to 0.325.

Abstract: A safety needle assembly includes a hub including a proximal end and a distal end, the proximal end being connectable to a syringe, a cannula, a collar, a protector, and a sheath sheath including an opening extending in a longitudinal direction along at least a part of the sheath, the opening being configured to house the cannula, a cannula fixing part configured to fix the cannula with respect to the sheath, the cannula fixing part comprising a plurality of wing walls extending in a longitudinal direction along at least a part of the sheath; an attachment part configured to rotatably support the sheath with respect to the collar such that the attachment part is rotatable to a position at which the cannula is housed in the opening of the sheath; and a guide rib including a locking protrusion configured to lock the cannula inside the opening.

Abstract: An injection needle includes a needle tube having a proximal end and a distal end, and an edge surface provided at the distal end of the needle tube. The edge surface includes a first ground facet, a second ground facet, and a third ground facet. The first ground facet is located at a position proximal to the second ground facet and the third ground facet. The second ground facet and the third ground facet converge to form a needle point that is offset from a central plane that perpendicularly crosses the first ground facet and includes a central axis of the needle tube. A length of the edge surface is 0.6 to 2.2 mm. An outside diameter of the needle tube is 0.18 to 0.6 mm. A ratio of the outside diameter of the needle tube to the length of the edge surface is 0.265 to 0.325.

Abstract: A connector includes an inlet port into which liquid is poured and which has a first flow path for the liquid, a liquid discharge port to which a tube body is connectable and which has a second flow path discharging liquid from the first flow path to the connected tube body, a gas discharge which discharges air in the first flow path, and a blocking device which, when the liquid is poured in the first flow path, temporarily stops the liquid flow. Use of the connector involves sealing an opening section of the liquid discharge port, pouring liquid in the inlet port, causing air in the first flow path to be discharged, temporarily stopping the flow of the liquid in the first flow path, unsealing the opening section of the liquid discharge port, connecting the tube body to the liquid discharge port, and resuming flow of the liquid.

Abstract: A connector includes an inlet port into which liquid is poured and which has a first flow path for the liquid, a liquid discharge port to which a tube body is connectable and which has a second flow path discharging liquid from the first flow path to the connected tube body, a gas discharge which discharges air in the first flow path, and a blocking device which, when the liquid is poured in the first flow path, temporarily stops the liquid flow. Use of the connector involves sealing an opening section of the liquid discharge port, pouring liquid in the inlet port, causing air in the first flow path to be discharged, temporarily stopping the flow of the liquid in the first flow path, unsealing the opening section of the liquid discharge port, connecting the tube body to the liquid discharge port, and resuming flow of the liquid.

Abstract: A syringe assembly includes a syringe body, and a plunger having a main body and a gasket mounted on its distal end portion. A needle-mounting member is detachably mounted on a distal end portion of the plunger main body. A plunger-engaging mechanism is provided on the needle-mounting member. An engaging member is provided on a distal end of the gasket, for engaging with the plunger-engaging mechanism. The needle-mounting member and the plunger further have a first structure which transmits a torque from the plunger in a direction to release an engagement between the syringe main body and the needle-mounting member to the needle-mounting member, and a second structure which releases an engagement between the engaging member and the plunger-engaging mechanism through a rotation of the plunger in a direction to keep an engagement between the needle-mounting member and the plunger main body.

Abstract: A blood collecting needle of the present invention comprises a hollow cannula, both ends of which are sharp tips, and a hub for supporting the center portion thereof. The hub comprises a sheath which surrounds the cannula in a liquid sealed state projecting from the back section of the hub, formed of an elastic body fixedly mounted on the hub, and an air passage connecting the space between the sheath and the cannula with outside air.As a result, flashback can be reliably confirmed, for example, when the tip of the cannula pierces an intravenous vein.

Abstract: A blood collecting needle including a hollow cannula, both ends of which are sharp tips, and a hub for supporting the center portion thereof. The hub includes a sheath which is formed of an elastic body and fixedly mounted on the hub and which surrounds the cannula in a liquid sealed state projecting from the back section of the hub. The hub also includes an air passage connecting the space between the sheath and the cannula with outside air. Flashback can be reliably confirmed, for example, when the tip of the cannula pierces an intravenous vein.