JPH0417162Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The article of the present invention is a medical device used in the medical field, and is a catheter assembly capable of injecting a medicinal liquid into an affected part of the body and indwelling the proposed catheter in the affected part. Regarding.

[Conventional technology]

The previous technology includes the Actual Notification No. 1661 (1983) and the Special Notification No. 1661 (1982).
No. 91968, JP-A-56-11069, JP-A-63-252168
There is a technology in which the outer catheter is split in the longitudinal direction of the axis.

[Problem that the invention attempts to solve]

However, when these products are used, the needle base of the outer tube cannot be fixed to the needle base of the inner tube, so when puncturing the patient's affected area with these products, the outer tube may move back against the puncture. This may make it difficult to place the inner tube in the affected area.

[Means for solving problems]

The present invention solves the above-mentioned problems by making the needle base of the inner tube freely fixable to or detachable from the needle base of the outer tube so that the inner tube can be easily placed in the affected area of the patient. Furthermore, the outer needle base has the above-mentioned fixation or detachment function, and has a shape that makes it extremely easy to remove the inner tube together with the outer tube while the inner tube is left in place in the affected area. A winged needle base having a synthetic resin tretz is provided, and the winged needle base has a symmetrically split holding part that holds the outer tube, and a symmetrically split holding part that holds the outer tube, and a winged needle base that has a symmetrically split holding part that holds the outer tube, and a winged needle base that has a symmetrically split holding part that holds the outer tube and an inner side of each tip that is folded inwardly. A lock part that can be fixed or detached is provided on the luer lock screw part of the needle base of the tube to solve the problem.

[Example of idea]

1 to 5 are drawings of an embodiment of the present invention.

FIG. 1 is an external appearance diagram of an embodiment of the catheter assembly of the present invention. The catheter assembly having a double structure has a symmetrical tretz on the inside of an outer tube 1 made of synthetic resin with a molecular structure that can be split arbitrarily in the longitudinal axis direction, and can be assembled by folding it toward the inside. A winged needle base 2 made of synthetic resin is provided, and the winged needle base has a holding part 2a that holds the outer tube and splits symmetrically, and an inner tube 3 at each tip that is folded symmetrically inward.
A lock portion 2b that is fixed to or released from the luer lock screw portion 4c of the needle base 4 is provided, and the inner tube is formed of a synthetic resin tube containing an X-ray image contrast material, and the tip portion is shaped like a nozzle and has stems on all sides. A tapered tapered part 3b with a string or a nozzle shape having a broken flower shape and a part 3a having a tapered end part are formed, and the tapered part 3a is provided on the needle base 4 and assembled and fixed with a fixing member 5, and the lure lock is attached. Thread part 4c
The winged needle base 2 is configured such that it can be fixed to or detached from the lock portion 2b of the winged needle base 2, and can be assembled freely.

FIG. 2 is an exploded view of the outer tube 1 assembly. Figure A shows an end portion 1a of an outer tube 1 made of synthetic resin with a molecular structure that can be arbitrarily split in the longitudinal direction.
It is a diagram in which the hole 1b is symmetrically provided by dividing the hole 1b into two. Figure B shows a winged needle base 2 with a tort on the outer tube 1.
The winged needle base made of synthetic resin, which can be assembled by folding symmetrically inward, has a symmetrically split holding part 2a that holds the outer tube 1, and a symmetrically split inner part 2a that holds the outer tube 1. At the tip of each folded end, there is a joint surface that is fixed to or detached from a Luer lock threaded portion 4c (described later) of the needle base 4 of the inner tube 3. 2d is a part that is folded inward. Reference numeral 2e denotes a hole into which the protrusion 2f is fitted, and before this fitting, the hole 1b of the terminal portion 1a of the outer tube 1 is fitted into the protrusion 2f so that the inner tube has a tretz and is folded inward. This prevents the tube 1 from falling off. 2g is a hole for holding the tube 1.
Figure C is a top view of Figure B.

FIG. 3 is an external view when the outer tube 1 is assembled by passing it through the hole 2g of the holding part 2a of the winged needle base 2. The symmetrically provided holes 1b of the tube 1 are fitted into the symmetrically provided protrusions 2f of the winged needle base 2 having the tretz, and the wings of the winged needle base 2 are folded symmetrically inward. The assembly of the outer tube 1 is then assembled, and the locking portions 2b at the tips of each of the needle hubs form a pair and are attached to the inner tube 3.
Luer lock screw part 4c of needle base 4 (described later)
A lock portion 2b is formed to be fixed or detached.

FIG. 4 is an external view of the inner tube 3 assembly. The distal end portion of the inner tube 3 is assembled into the needle base 4 by forming a tapered portion in the shape of a nozzle or a tapered portion with a string in the shape of a split flower (shown in the drawing). The tube 3 is fixed and assembled inside the needle base 4 by a fixing member 5.

FIG. 5 is an exploded view of the assembly of the inner tube 3 of FIG. 4. Figure A is an external view of the inner tube 3, in which the distal end is tapered in the shape of a nozzle or a tapered part 3a with a string is formed in the shape of a broken flower (shown in the figure), and the terminal part is connected to the needle base 4. A wrapper portion 3a is formed so that it can be fixed. FIG.
4c is a screw portion of the member 5 that fixes the lapper portion 3a, 4c is a luer lock screw member that is fixed to or detached from the lock portions 2b, 2b of the winged needle base 2 of the outer tube 1, and 4d is a screw portion of the member 5 that fixes the lapper portion 3a. 3
It is a hole that holds the Figure C shows a fixing member for fixing the inner tube 3 to the needle base 4, and 5a
is a screw that is screwed into the screw 4b of the needle base 4, and 5b
5c is a lock portion for connecting a syringe barrel (not shown), etc., and 5d is a tapered hole for joining the syringe barrel, etc.

[Effect of idea]

As described above, according to one embodiment of the present invention, the structure of the winged needle base of the outer tube 1 as shown in the figure allows the outer tube 1 to retract by the size difference from the inner tube 3 during puncture. The problems that occur when the inner tube 3 is placed in the affected area are resolved because the assembly of the outer tube 1 and the assembly of the inner tube 3 can be firmly fixed or detached, and extremely smooth puncture and placement are possible. In addition, since the material of the outer tube 1 is limited to synthetic resin with a molecular structure that can be arbitrarily split in the longitudinal direction, the tube 1 can be moved vertically in the axial direction very easily in order to place the inner tube 3 in the affected area. It can be easily broken and removed from the affected area, and each component is configured to be assembled freely, so it has the advantage of reducing packaging space, reducing storage space, and making storage convenient. ing.

[Brief explanation of the drawing]

1 to 5 are drawings of an embodiment of the present invention. FIG. 1 is an external appearance diagram of an embodiment of the catheter assembly of the present invention. FIG. 2 is an exploded view of the outer tube 1 assembly. Figure A is a diagram in which the terminal portion 1a of an outer tube 1 made of synthetic resin having a molecular structure that can be arbitrarily split in the vertical axis direction is divided into two parts, and holes 1b are symmetrically provided. Figure B is a side sectional view of the winged needle base 2. Figure C is a top view of Figure B. FIG. 3 is an external view when the outer tube 1 is assembled by passing it through the hole 2g of the holding part 2a of the winged needle base 2. FIG. 4 is an external view of the inner tube 3 assembly. FIG. 5 is an exploded view of the assembly of the inner tube 3 of FIG. 4. Figure A is an external view of the inner tube 3. Figure B shows the needle base 4 of the inner tube 3.
FIG. Figure C shows a fixing member that fixes the inner tube 3 to the needle base 4. 1...Outer tube. 1a...Terminal section divided into two parts. 1b...hole. 2... A winged needle base made of synthetic resin that has a symmetrical toret on the inside and can be assembled by folding inward. 2a...Holding part that splits symmetrically. 2b...A lock portion that is fixed to or detached from the Luer lock screw portion 4c of the needle base 4 of the inner tube 3 at each tip of the winged needle base 2 that is folded symmetrically inward. 2c...Folding joint surface.
2d...The part that folds inward. 2e...A hole into which the convex portion 2f is fitted. 2f...Protrusion. 2g...Hole for holding tube 1. 3...Inner tube. 3a
...Ratsupa-shaped fixed part. 3b...Tip part. A nozzle-shaped tapered part with a string or a nozzle-shaped tapered part with stems split on all sides and a flower-shaped nozzle. 4...Inner tube 3
needle base. 4a...A portion that receives the lattice part 3a of the tube 3. 4b...A screw portion into which the fixing member 5 is screwed. 4c... Luer lock screw member that fixes or detaches the lock portion 2b of the winged needle base 2. 4d... Hole through which tube 3 is passed and held. 5... Fixed member. 5
a...Screw that is screwed into the screw 4b of the needle base 4. 5b...
...A portion that presses against the flap portion 3a of the tube 3.
5c...Lock part for connecting a syringe barrel (not shown), etc. 5d...Tapered hole for joining a syringe, etc.

Claims (1)

[Scope of utility model registration request] In a catheter with a double or multilayer structure, an inner side made of synthetic resin that can be assembled by folding symmetrically inward to an outer tube 1 made of synthetic resin with a molecular structure that can be arbitrarily split in the longitudinal axis direction. A winged needle base 2 having a tretz is provided, and the winged needle base has a symmetrically split holding part 2a that holds the outer tube, and an inner tube 3 at the tip of each wing that is folded symmetrically inward. A lock part 2b which can be fixed to or removed from the luer lock screw part 4c of the needle base 4 is provided, and the inner tube is formed of a synthetic resin tube containing an X-ray contrast agent, and the tip is attached with a string that has a flower-like shape with stems split in all directions. A nozzle-shaped tapered part or a nozzle-shaped tapered part 3b and a part 3a whose end part is formed into a flap shape are provided, and the needle base 4 has a fixing member 5 that fixes the flap part 3a and the winged needle base 2. A catheter assembly characterized in that the lock parts 2b and 2b are provided with a luer lock screw part 4c which can be fixed or detached, and can be assembled freely.