JPH0337628Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a winged indwelling needle that is left in a patient's blood vessel for a long time during hemodialysis or continuous infusion.

(Prior art) In order to protect the blood vessel, a winged indwelling needle is inserted into a blood vessel with the blade surface of the hollow needle facing upward, and then rotated 180 degrees to remove the blade surface. The patient is placed face down.

In ordinary winged indwelling needles, the hollow needle and the wings are fixed together, and in order to flip the blade surface after the hollow needle is inserted into the blood vessel, the blade must be flipped together with the wings, and the wings get in the way. The operation was troublesome.

In order to solve this problem, a winged indwelling needle described in Japanese Utility Model Application Publication No. 57-76638 has been proposed. The structure of this winged indwelling needle is shown in FIG. 7 and is as follows.

A needle base c is provided at the base of a hollow needle b having an inclined blade surface a, and the needle base c is inserted through a winged holding cylinder d so as to be rotatable. A groove e is formed on the outer periphery of the winged holding cylinder d, and a pin f provided on the needle base c is guided through the groove e, and the needle base c rotates 180 degrees. Then, the blade surface a is reversed.

However, with the above configuration, the hollow needle b can only be turned in one direction.

For this reason, when even the slightest force is applied to the infusion tube h etc. connected to the needle base c in the direction of rotation of the needle base c, the needle base c is forced to rotate in the opposite direction, and the blade surface a It may rotate and damage the blood vessel wall. In order to prevent this rotation of the needle base c, the needle base c had to be fixed and pasted with adhesive tape, which was an inconvenience.

(Problems to be solved by the present invention) The present invention rotates the hollow needle in the direction to eliminate the bulge even when there is a bulge in the connected infusion pipe, etc., and holds the hollow needle with wings. It is an object of the present invention to provide a winged indwelling needle that can be fixed to a cylinder to prevent the position of the blade surface from changing.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a needle base at the base of a hollow needle with an inclined blade surface, and the needle base is rotated around a winged holding cylinder. The winged indwelling needle is movably inserted and provided, and the needle base is provided with a locking part that prevents the needle base from coming off with respect to the winged holding cylinder,
The rear end of the needle base protrudes from the rear end of the winged holding cylinder, allowing for the insertion of an infusion tube, etc., and at the position where the needle base and the holding cylinder are in sliding contact, the needle base is inserted into either the holding cylinder or the needle base. When the stopper is provided with a fitting part for the stopper on the other side, the blade is fixed in close contact with the mounting part, and the blade surface is directed toward the mounting part, the stopper and the fitting part fit into each other. It is characterized by being provided in a position that matches the

(Function) By adopting this configuration, the present invention has the following features:
After inserting the hollow needle into a blood vessel, when reversing the blade surface with the winged holding tube fixed, the needle base is rotated in a direction that eliminates the stiffness of the infusion tube, etc. connected to the needle base,
By fitting the stopper into the fitting part, the blade surface is prevented from rotating.

(Example) A further detailed explanation will be given with reference to the drawings showing an example of implementation of the present invention.

FIG. 1 is a plan view of the winged indwelling needle 1, and FIG. 2 is a side view thereof.

In FIG. 1, a winged indwelling needle 1 includes a hollow needle 3, generally made of stainless steel, having an inclined blade surface 2, and a cylindrical needle base 4, generally made of a hard synthetic resin material, which fixes and holds the base of the hollow needle 3. , a winged holding tube 5 made of a flexible synthetic resin material which is rotatably inserted and held through the needle base 4, and a large-diameter locking portion 7 is provided on the hollow needle 3 side of the needle base 4. The needle base 4 is provided in the winged holding tube 5 to prevent it from slipping out, and the infusion tube 6, which is generally made of a flexible synthetic resin material, is fitted onto the needle base 4 that protrudes rearward from the winged holding tube 5. The hollow needle 3 and the infusion tube 6 are communicated with each other.

A stopper 8 consisting of a protrusion is provided on the locking portion 7 of the needle base 4 at a position where it slides into contact with the holding cylinder 5 and on the side opposite to the blade surface 2 of the hollow needle 3, and the stopper 8 is pressed against the holding cylinder 5 side. The end 9 of the infusion tube 6, which is fitted externally so as to apply force, is forcibly fitted onto the needle base 4 and fixed, and the end 9 of the infusion tube is elastically deformed to move the stopper 8 to the holding cylinder 5. was brought into pressure contact with the front edge 10 of.

The front edge 10 of the winged holding cylinder 5 has a shape that fits into the stopper 8 when the wings 10 of the holding cylinder 5 are fixed to the mounting site and the blade surface 2 of the hollow needle 3 is directed toward the mounting site. A fitting portion 11, which is a recessed portion for fitting, is provided.

When penetrating a blood vessel, the stopper 8 is instructed to be positioned at a position rotated 180 degrees from the fitting part 11 in order to position the blade surface 2 so that it faces opposite to the attachment site. A display protrusion 13 is provided on the holding cylinder 5.

Therefore, the stopper 8 is connected to the display protrusion 13 of the holding cylinder 5.
When the blades 12 of the holding cylinder 5 are fixed to the attachment site in accordance with The blade surface 2 was made to face the attachment site when the blade was opened.

Next, a method of using the above embodiment will be explained.

First, before inserting the hollow needle 3 into the blood vessel,
As shown in FIGS. 1 and 2, the position of the stopper 8 is aligned with the display protrusion 13 of the winged holding cylinder 5, and it is confirmed that the blade surface 2 of the hollow needle 3 faces the opposite side from the attachment site. Next, the hollow needle 3 is inserted into the blood vessel by holding the wings 12 in a state where the blade faces are in a closed position.
After that, both wings 12 are spread, and the wings 12 are pasted and fixed to the skin at the attachment site with adhesive tape, the needle base 4 is rotated 180 degrees with respect to the winged holding cylinder 5, and the stopper 8 is moved to the position of the fitting part 11. When rotated until the end, the blade surface 2 faces the mounting area as shown in the third figure, and the stopper 8
is forcibly fitted into the fitting part 11 by the elasticity of the end 9 of the infusion tube 6.

Once the stopper 8 has finished rotating and is fitted into the fitting part 11, the needle base 4 is moved by the force of the infusion tube 6, etc.
Even if a force is applied to rotate the stopper 8, the stopper 8 will not come off from the fitting part 11.

Furthermore, when the blade surface 2 faces the attachment site of the wing 12, the needle base 4 is rotated in a direction that eliminates the force of the infusion tube 6, etc., thereby reducing the force of the force. .

In the above embodiment, the stopper 8 is provided on the needle base 4 and the fitting part 11 is provided on the holding cylinder side, but it is also possible to provide the fitting part 11 on the needle base side and the stopper 8 on the holding cylinder side. It may be provided.

4 to 6 show other embodiments of the present invention.

FIG. 4 is a plan view thereof, and FIG. 5 is a sectional view taken along line V-V in FIG. 4.

In this embodiment, the stopper 8 and the fitting part 11 of the previous embodiment are provided at the insertion part between the needle base 4 and the winged holding cylinder 5, and the other configurations are as follows.
There is no difference from the above embodiments. The winged holding cylinder 5 is made of flexible synthetic resin, and the needle base 4 is made of hard synthetic resin. The stopper 8 is a projection formed integrally with the outer circumferential surface of the needle base 4 inserted into the holding cylinder 5. The stopper rotatably presses against the inner surface of the holding cylinder 5 while elastically deforming it. It is adapted to fit into a fitting part 11 formed as a recess on the inner surface of the.

(Effect) As is clear from the above explanation, when the present invention is used, the needle base of the hollow needle is rotatably provided in the winged holding cylinder, and the infusion tube etc. can be freely inserted into the rear end of the needle base. A stopper that regulates the position of the blade surface of the hollow needle and prevents it from rotating, and its fitting part are provided at the position where the needle base of the hollow needle and the winged holding cylinder come into sliding contact, so that the wings are tightly attached to the attachment site and fixed. Since the stopper and the fitting part fit together when the blade surface is turned toward the attachment site, the hollow needle can be inserted into the blood vessel with the blade surface facing away from the attachment site. After the needle is inserted, the needle base can be rotated in any direction to eliminate the cleavage of the infusion tube, etc. connected to the needle base, and the blade surface can be reversed. The effect of providing a winged indwelling needle that can reduce the rotation of the blade surface in the state of insertion and prevent rotation of the blade surface of the hollow needle by fitting the stopper and the fitting part is as follows. be.

[Brief explanation of the drawing]

1 to 3 show an example of the implementation of the present invention.
The figure is a side view, Figure 3 is a plan view similar to Figure 1 with the blade surface of the hollow needle shown in Figure 1 inverted, and Figures 4 to 6 show other embodiments of the present invention. Something,
4 is a plan view, FIG. 5 is a sectional view taken along the line V-V in FIG. 4, FIG. 6 is a sectional view similar to FIG. 5 with the blade surface of the hollow needle shown in FIG. The figure is a partially cutaway plan view showing a conventional example. 1... Winged indwelling needle, 2... Blade surface, 3... Hollow needle, 4... Needle base, 5... Winged holding cylinder, 7... Locking part, 8... Stopper, 11... Fitting Gobe, 12...
...Wings.

Claims (1)

[Scope of utility model registration request] A winged indwelling needle in which a needle base is provided at the base of a hollow needle with an inclined blade surface, and the needle base is rotatably inserted into a winged holding tube. A locking part is provided on the needle base to prevent the needle base from coming off, and the rear end of the needle base protrudes from the rear end of the winged holding tube to allow an infusion tube, etc. to be inserted freely between the needle base and the holding tube. At the sliding contact position with the holding tube or the needle base, either the holding tube or the needle base is provided with a stopper, and the other side is provided with a fitting part with the stopper, the wings are fixed in close contact with the attachment site, and the blade surface is in contact with the attachment site. A winged indwelling needle characterized in that a stopper and a fitting part are provided at a position where they fit into each other when turned to the side.