Abstract: A valve body and a medical instrument provided with the valve body can stably maintain sealing performance for preventing air/blood leakage while maintaining a smooth insertion feeling even when various types of medical devices are repeatedly inserted and removed. The valve body includes a main body portion having oppositely facing first and second surfaces, an outer peripheral surface extending between the first and second surfaces, and an insertion portion having an inner surface defining a gap that allows insertion of a medical device and formed at least on the first surface. The main body portion contains a self-repairing material that allows self-repairing damage resulting from contact with the medical device. At least part of the inner surface of the insertion portion is provided with a coating layer that prevents the gap from being closed by self-repair when portions of the inner surface of the insertion portion contact each other.

Abstract: An introducer sheath is disclosed, which includes a tube body that is percutaneously inserted into a body lumen; and a hub that is connected to a proximal portion of the tube body. The tube body contains a polyvinylidene fluoride resin, a ratio of a thickness to an inner diameter of the tube body is 1/16 or lower, and a ratio of a kink radius to an outer diameter of the tube body is 9.5 or lower.

Abstract: An introducer sheath is disclosed, which includes a tube body that is percutaneously inserted into a body lumen; and a hub that is connected to a proximal portion of the tube body. The tube body contains a polyvinylidene fluoride resin, a ratio of a thickness to an inner diameter of the tube body is 1/16 or lower, and a ration of a kink radius to an outer diameter of the tube body is 9.5 or lower.

Abstract: A puncture device is provided that does not allow an outer needle to collapse or rise at the time of puncture and exhibits small puncture resistance. A puncture device 1 includes: a hollow outer needle 2; an outer needle hub 3 provided at a proximal end portion of the outer needle 2; a hollow inner needle 4 inserted into the outer needle 2 for use; and an inner needle hub 5 provided at a proximal end portion of the inner needle 4. The inner needle 4 includes, from the distal side, a sharp needlepoint 41, a small diameter portion 42 having an almost uniform outer diameter; an intermediate portion 43 formed as a tapered portion which is progressively increased in outer diameter as it goes toward the proximal end; and a larger diameter portion 44 having inner and outer diameters larger than inner and outer diameters, respectively, of the small diameter portion 42.

Abstract: An applicator is disclosed, which includes a nozzle, the nozzle including a gas channel through which a gas G flows, a plurality of liquid channels which are provided inside the gas channel and through which each of a first liquid and a second liquid flows, and a confluence portion which is located on a downstream side of the liquid channels and in which the flows of the liquids join. Of the gas channel, a portion between the liquid channels and the confluence portion is configured from a single gas-permeable tube composed of a gas-permeable membrane permeable to the gas but impermeable to the liquids. The gas-permeable tube is independently connected to the liquid channels, and has a first independent channel and a second independent channel through which the first liquid and the second liquid flow toward the confluence portion together with the gas flowing in through the gas-permeable membrane.

Abstract: The syringe includes first and second outer cylinders having a flowing port at a distal end through which liquid is flowable, and a plunger inserted from the proximal side of the outer cylinder. The syringe includes a tooth portion provided along the direction of movement of the plunger, and a hook configured to lock the tooth portion at a predetermined locking position and prevent the movement of the plunger in the direction toward the proximal end. The hook retracts from the locking position in association with the unlocking operation and restores automatically to the locking position after the unlocking operation.

Abstract: The syringe includes first and second outer cylinders having a flowing port at a distal end through which liquid is flowable, and a plunger inserted from the proximal side of the outer cylinder. The syringe includes a tooth portion provided along the direction of movement of the plunger, and a hook configured to lock the tooth portion at a predetermined locking position and prevent the movement of the plunger in the direction toward the proximal end. The hook retracts from the locking position in association with the unlocking operation and restores automatically to the locking position after the unlocking operation.

Abstract: A double-ended needle and a mixing instrument which are capable of suppressing a reverse flow of a solution are provided. A double-ended needle which constitutes part of a mixing instrument includes a first puncture portion and a second puncture portion having inner cavities thereof communicating with each other, an inner cavity of the first puncture portion and an inner cavity of the second puncture portion communicate with each other, and the lateral cross-sectional area of the inner cavity of the first puncture portion is smaller than the lateral cross-sectional area of the inner cavity of the second puncture portion.

Abstract: A stent graft is an example of a repairing material for lumens such as aorta and other blood vessels and trachea of a living body. The stent graft includes warp yarns of plastic material and weft yarns including filaments of at least one of shape-memory plastic, shape-memory alloy, and super-elastic metal, the warp yarns and weft yarns being interwoven into a tubular shape such that the weft yarns extend in the circumferential direction and the warp yarns extend in the axial direction. Either or both of the warp yarns and weft yarns are formed from yarns capable of swelling by body fluid or from yarns with a coating capable of swelling by body fluid.

Abstract: A catheter includes a proximal shaft having a relatively high rigidity, a distal shaft provided on a front portion of the proximal shaft so as to be in fluid communication with proximal shaft and having a rigidity lower than that of the proximal shaft, a hub mounted to the vicinity of a rear end of the proximal shaft and configured to allow a pressure applying apparatus to be mounted to the hub, and a balloon provided on a front portion of the distal shaft so as to be in fluid communication with the distal shaft and configured to receive pressure applied from the hub. The catheter also includes a guide wire lumen. In this catheter, at least a front portion of the distal shaft is configured as a grooved portion having a groove or grooves.

Abstract: A device (such as guidewire inserter) for easily and certainly inserting a medical long item having a curved tip into a tube such as catheter and sheath includes a tubular member having a bore for passage of a guidewire. The tubular member has a slit cutting across the wall over the total length of the tubular member. The proximal end of the tubular member has an aperture. The proximal end of the aperture has an open part and a connecting part adjacent thereto for the holder tube. There is a pair of wing-like protruded pieces projecting in the mutually opposite directions at both sides of the open part. The distal end of the tubular member has on its outer surface a pair of protruded rims, which project in the mutually opposite directions.

Abstract: A puncture device is provided that does not allow an outer needle to collapse or rise at the time of puncture and exhibits small puncture resistance. A puncture device 1 includes: a hollow outer needle 2; an outer needle hub 3 provided at a proximal end portion of the outer needle 2; a hollow inner needle 4 inserted into the outer needle 2 for use; and an inner needle hub 5 provided at a proximal end portion of the inner needle 4. The inner needle 4 includes, from the distal side, a sharp needlepoint 41, a small diameter portion 42 having an almost uniform outer diameter; an intermediate portion 43 formed as a tapered portion which is progressively increased in outer diameter as it goes toward the proximal end; and a larger diameter portion 44 having inner and outer diameters larger than inner and outer diameters, respectively, of the small diameter portion 42.

Abstract: Disclosed herein is a device (such as guidewire inserter) for easily and certainly inserting a medical long item having a curved tip into a tube such as catheter and sheath. The guidewire inserter is a tubular member having therein a bore for passage of a guidewire. The tubular member has a slit cutting across the wall thereof over the total length thereof. The tubular member has at the proximal end thereof an aperture, which results from the slit expanding toward the proximal end. The tubular member has at the proximal end of the aperture an open part and a connecting part adjacent thereto for the holder tube. There are a pair of wing-like protruded pieces projecting in the mutually opposite directions at both sides of the open part. The distal end of the tubular member has on its outer surface a pair of protruded rims, which project in the mutually opposite directions with respect to the central axis of the tubular member.

Abstract: Disclosed herein is a device (such as guidewire inserter) for easily and certainly inserting a medical long item having a curved tip into a tube such as catheter and sheath. The guidewire inserter is a tubular member having therein a bore for passage of a guidewire. The tubular member has a slit cutting across the wall thereof over the total length thereof. The tubular member has at the proximal end thereof an aperture, which results from the slit expanding toward the proximal end. The tubular member has at the proximal end of the aperture an open part and a connecting part adjacent thereto for the holder tube. There are a pair of wing-like protruded pieces projecting in the mutually opposite directions at both sides of the open part. The distal end of the tubular member has on its outer surface a pair of protruded rims, which project in the mutually opposite directions with respect to the central axis of the tubular member.

Abstract: Disclosed herein is a device (such as guidewire inserter) for easily and certainly inserting a medical long item having a curved tip into a tube such as catheter and sheath. The guidewire inserter is a tubular member having therein a bore for passage of a guidewire. The tubular member has a slit cutting across the wall thereof over the total length thereof. The tubular member has at the proximal end thereof an aperture, which results from the slit expanding toward the proximal end. The tubular member has at the proximal end of the aperture an open part and a connecting part adjacent thereto for the holder tube. There are a pair of wing-like protruded pieces projecting in the mutually opposite directions at both sides of the open part. The distal end of the tubular member has on its outer surface a pair of protruded rims, which project in the mutually opposite directions with respect to the central axis of the tubular member.

Abstract: A catheter includes a proximal shaft having a relatively high rigidity, a distal shaft provided on a front portion of the proximal shaft so as to be in fluid communication with proximal shaft and having a rigidity lower than that of the proximal shaft, a hub mounted to the vicinity of a rear end of the proximal shaft and configured to allow a pressure applying apparatus to be mounted to the hub, and a balloon provided on a front portion of the distal shaft so as to be in fluid communication with the distal shaft and configured to receive pressure applied from the hub. The catheter also includes a guide wire lumen for allowing a guide wire to be inserted through the guide wire lumen. The guide wire lumen has a distal side aperture positioned on the front side from a front end of the balloon and a proximal side aperture positioned on the rear side from a rear end of the balloon. In this catheter, at least a front portion of the distal shaft is configured as a grooved portion having a groove or grooves.