JP2001190683A - Needling tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needling tool which has a simple constitution and the needle (for example, a used inner needle) of which can be covered through simple operation and can be maintained reliably in the covered state, resulting in high safety of the tool when the tool is subjected to disposition, etc. SOLUTION: The needling tool 1 constitutes a indwelling needle assembly (particularly, an indwelling needle assembly for infusion) and is provided with an outer needle 2 which is an indwelling needle, an outer needle hub 3 installed to the base-side end section of the needle 2, and an inner needle 3 which is inserted into the outer needle 2 for use. The tool is also provided with an inner needle hub 5 installed to the base-side end section of the inner needle 4, a cap 6 which is set up along the needle 4 so that the cap 6 may move in the longitudinal direction of the needle 4, and a flexible member 7 which is disposed between the inner needle hub 5 and cap 6 and changes in shape following the deformation of the needle 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a puncture device used for puncturing a blood vessel, for example, for infusion or blood collection.

[0002]

2. Description of the Related Art When an infusion is performed on a patient, an indwelling needle connected to an infusion line is punctured into a patient's blood vessel, and is indwelled. Such a puncture device includes a hollow outer needle that is an indwelling needle, an outer needle hub fixed to a proximal end of the outer needle, and an inner needle that is inserted into the outer needle and has a sharp needle tip at a distal end. ,
An inner needle hub fixed to the proximal end of the inner needle.

When piercing the outer needle of this puncture device into a blood vessel of a patient, the inner needle is inserted into the outer needle, and the puncture operation is performed with the tip of the inner needle projected from the tip of the outer needle. . When the needle tip of the inner needle reaches the inside of the blood vessel, the blood flowing from the opening of the needle tip flows through the inner lumen of the inner needle and flows into the inside of the transparent inner needle hub (flashback). Thereby, it can be confirmed that the inner needle has secured the blood vessel.

[0004] After confirming the flashback, the inner needle and the outer needle are advanced slightly, and the tip of the outer needle is inserted into the blood vessel. Next, while grasping the outer needle by hand, the inner needle is pulled out from the outer needle, and the connector of the infusion line is connected to the outer needle hub. Then, the infusion is administered through the connected infusion line and the outer needle.

By the way, the inner needle extracted from the outer needle is
Since it becomes unnecessary, it is disposed of.However, blood adheres and remains on the surface and inside of the inner needle. Discarding this as it is may cause blood contamination and infection, There is a possibility that an accident may occur when a person or the like accidentally points a finger or the like with a needle point.

Accordingly, measures have been taken such as disposing of the used inner needle in the opened packaging material containing the indwelling needle kit, or disposing the inner needle with a cap. I have.

However, even when such an inner needle is wrapped with a wrapping material or covered with a cap, blood adhering to or remaining on the inner needle may reach the operator's hand or work may be performed with the needle of the inner needle. In order not to point the hand of the person
Careful attention must be paid, and there is a problem in that disposal of the inner needle after use requires a great deal of trouble. Therefore, the following puncture device has been proposed.

FIG. 12, FIG. 13, FIG. 14 and FIG.
It is a side view which shows the conventional puncture tool, respectively. In the following description, the right side in FIGS. 12 to 15 is referred to as a “proximal end” and the left side is referred to as a “distal end”.

The puncture device 100 shown in these figures has a hollow outer needle (not shown), an outer needle hub (not shown) fixed to the proximal end of the outer needle, a needle inserted into the outer needle, and a sharp needle at the distal end. An inner needle 110 having a tip 111; an inner needle hub 120 fixed to the proximal end of the inner needle 110;
And a telescopic member for connecting the inner needle hub 120 and the cap 130 (a telescopic member)
140.

In this puncture device 100, before use, the extensible member 140 contracts, and the cap 130 is located at the base end of the inner needle 110.

After the puncturing operation described above, the inner needle 11
When withdrawing the outer needle 0 from the outer needle, the extensible member 140 expands and the cap 130 moves to the distal end side, and as shown in FIG.
11 is covered. In this state, the needle tip 11 of the inner needle 110 is
1 is in contact with a projection (not shown) of the cap 130.

However, in the conventional puncture device 100, for example, the cap 130 is moved from the distal end side to the proximal end side.
When the force is applied to the inner needle 110, as shown in FIG. 13, the inner needle 110 is deformed. Thereafter, as shown in FIG. 14, the elastic member 140 is extended, and only the cap 130 returns to the original position. The needle tip 111 of the inner needle 110 is a telescopic member 140
(The needle tip 111 of the inner needle 110 is not covered with the cap 130).

In such a state, the extensible member 1
When 40 is bent or curved, FIG.
As shown in the figure, the needle tip 111 of the inner needle 110 may penetrate the extensible member 140, and this may cause an accident that a discarding worker or the like accidentally points a finger or the like with the needle tip 111. is there.

[0014]

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple structure, a simple operation for covering a needle (for example, a used inner needle), and a state in which the needle is covered. An object of the present invention is to provide a puncture tool that can be securely held and has high safety in disposal processing and the like.

[0015]

This and other objects are achieved by the present invention which is defined below as (1) to (15).

(1) A needle having a sharp needle tip, a hub installed at the base end of the needle, and at least the needle tip of the needle can be covered, and the needle is along the needle. A puncture device, comprising: a cap movably installed in a longitudinal direction of the needle; and a flexible member provided between the hub and the cap, the deformable member being deformed following the deformation of the needle.

(2) The puncture device according to (1), further comprising a hollow outer needle through which the needle can be inserted.

(3) The puncture device according to (2), wherein an outer needle hub is provided at a base end of the outer needle, and the cap is detachably attached to the outer needle hub.

(4) When the cap is located near the hub, the flexible member is in a contracted state, and the cap is located at a position where the cap covers at least the needle tip of the needle. The puncture device according to any one of (1) to (3) above, wherein the flexible member is in an extended state.

(5) The cap includes a cylindrical cap body into which the needle is inserted, and a base end side of the cap when the cap is located at a position covering at least the needle tip of the needle. The puncture device according to any one of the above (1) to (4), further comprising a movement inhibiting means for inhibiting movement of the puncture device.

(6) The movement inhibiting means is constituted by an elastic piece having an abutting portion which abuts on the tip of the needle to prevent the cap from moving toward the proximal end, and wherein the cap is provided with the hub. When the contact portion is located on the outer peripheral side of the needle, and when the cap is located at a position covering at least the needle tip of the needle, the restoring force of the elastic piece causes the abutment portion to be located near the needle. The puncture device according to the above (5), wherein the contact portion is inside the hollow portion of the cap main body and moves toward the distal end from the tip of the needle.

(7) The puncture device according to any one of (1) to (6), wherein the flexible member has a cylindrical shape, and the needle is inserted into the cylindrical member.

(8) The puncture device according to (7), wherein the flexible member is provided with a small-diameter portion having a relatively small inner diameter intermittently along the axial direction.

(9) The puncture device according to (8), wherein the outer diameter of the small diameter portion is smaller than the outer diameter in the vicinity thereof.

(10) The flexible member is provided along the longitudinal direction of the needle, and includes a plurality of ring portions surrounding the outer periphery of the needle, and a connecting portion connecting the plurality of ring portions. The puncture device according to any one of the above (1) to (6).

(11) The puncture device according to the above (10), wherein the annular portion is formed by making a linear body into an annular shape.

(12) The connecting portion (10) or (11), wherein the connecting portion is formed of at least one linear body.
The puncture device according to 1.

(13) The flexible member is provided along a longitudinal direction thereof, and is constituted by a belt-like body having a plurality of holes into which the needles are inserted.
The puncture device according to any one of the above.

(14) The puncture device according to (13), wherein the strip is folded when the cap is located near the hub.

(15) The above (1) to (14) wherein the cap is detachably attached to the hub.
The puncture device according to any one of the above.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a puncture device according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

FIGS. 1, 2 and 3 are sectional views showing a first embodiment of the puncture device of the present invention, and FIG.
FIG. 5 is a view showing a manufacturing process of the flexible member of the puncture device shown in FIG.
FIG. 2 is a perspective view showing an inner needle and a flexible member of the puncture device shown in FIG. In the following description, the right side in FIGS. 1 to 3 is referred to as a “proximal end” and the left side is referred to as a “distal end”.

The puncture device 1 shown in these figures constitutes an indwelling needle assembly having an outer needle and an inner needle (in particular, an indwelling needle assembly for infusion), and an outer needle 2 which is an indwelling needle. An outer needle hub 3 provided at a proximal end of the outer needle 2; an inner needle 4 used to be inserted into the outer needle 2; and an inner needle hub 5 provided at a proximal end of the inner needle 4. A cap 6 movably installed in the longitudinal direction along the inner needle 4, an inner needle hub 5 and a cap 6
And a flexible member 7 that is deformed following the deformation of the inner needle 4. Hereinafter, the configuration of each unit will be described.

The outer needle 2 preferably has a hollow shape and has a certain degree of flexibility. The constituent material of the outer needle 2 is not particularly limited.
Various soft resins such as tetrafluoroethylene copolymer (ETFE), polyurethane, and polyether nylon resin are preferred.

The entire outer needle 2 or a part thereof may have internal visibility. Further, an X-ray contrast agent such as barium sulfate or barium carbonate may be blended in the constituent material of the outer needle 2 to provide a contrast function.

The distal end of the outer needle 2 has a tapered shape whose outer diameter gradually decreases toward the distal end in order to easily puncture the living body with low invasiveness.

An outer needle hub 3 is fixed to the proximal end of the outer needle 2 in a liquid-tight manner, and the inner cavity of the outer needle 2 communicates with the inside of the outer needle hub 3.

The outer needle hub 3 is a substantially cylindrical member.
It has a tapered shape whose outer diameter and inner diameter gradually increase in the proximal direction.

The proximal end of the outer needle hub 3 has a flange 3
1 is formed. The outer needle hub 3 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured.

The method of fixing the outer needle 2 to the outer needle hub 3 is as follows.
For example, a method such as fitting, caulking, fusion (heat fusion, high frequency fusion, and the like), adhesion with an adhesive, and the like, or a method using these in combination may be mentioned.

The inner needle 4 is a hollow needle and is made of, for example, a metal material such as stainless steel, aluminum or an aluminum alloy, titanium or a titanium alloy.
A sharp needle tip 41 is formed at the tip of the inner needle 4. The shape of the needle tip 41 is not particularly limited, and in the present embodiment, has a blade surface inclined at a predetermined angle with respect to the axis of the inner needle 4.

The inner needle 4 is used in a state where it is inserted into the lumen of the outer needle 2. The length of the inner needle 4 is such that at least the needle tip 41 protrudes from the distal end opening 21 of the outer needle 2 in the assembled state.

The distal end 51 of the inner needle hub 5 is fixed to the proximal end of the inner needle 4, and the lumen of the inner needle 4 communicates with the inner space on the proximal end side of the inner needle hub 5. The inner needle hub 5 is formed of a substantially cylindrical member.

The method for fixing the inner needle 4 to the inner needle hub 5 is as follows.
For example, a method such as fitting, caulking, fusion, or bonding with an adhesive, or a method using these in combination is exemplified.

The inner needle hub 5 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured. Thus, when the needle tip 41 secures a blood vessel, it is possible to visually check the flashback of blood flowing through the inner needle 4.

A ring-shaped rib 511 is formed on the inner peripheral side of the distal end of the distal end portion 51 of the inner needle hub 5.

A ventilation filter 52 is provided at an opening on the base end side of the inner needle hub 5. This ventilation filter 5
No. 2 has a property of transmitting gas but blocking liquid.

Specific examples of the ventilation filter 52 include, for example, various sintered porous bodies, hydrophobic nonwoven fabrics, and other porous bodies. In this case, as the sintered porous body, a material obtained by sintering a material containing a polymer material (powder) such as polyethylene and a hydrophilic (water-soluble, water-swellable) polymer is preferable. When this sintered porous body is used, ventilation is blocked by contact with a liquid (blood), so that invasion of air from the outside can be prevented.

The cap 6 is a detachable member for each of the inner needle hub 5 and the outer needle hub 3, and has a cylindrical cap body 61 into which the inner needle 4 is inserted. The cap body 61 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured.

The cap 6 covers at least the needle tip 41 of the inner needle 4 shown in FIGS. 2 and 3 (first position).
And the vicinity (second position) of the inner needle hub 5 shown in FIG.
The inner needle 4 is installed so as to be movable along the inner needle 4 in the longitudinal direction.

The base end of the cap body 61 is connected to the inner needle hub 5.
Has a shape that can be fitted to the rib 511 of the distal end portion 51 of the rim.

A fitting portion 611 is formed at the base end of the cap body 61 so that the base end of the outer needle hub 3 is fitted. A ring-shaped rib 612 with which the flange 31 of the outer needle hub 3 engages is formed on the outer peripheral side of the distal end of the fitting portion 611.

The base end of the cap body 61 has
One end side (base end side) of the U-shaped elastic piece (movement inhibiting means) 62
Has been fixed. The other end side (tip side) of the elastic piece 62
Is a contact portion 621 that contacts the needle tip 41 of the inner needle 4 to prevent the movement of the cap 6. A protrusion 622 is provided on the right end in FIG. 2 and FIG. 3 of the end of the contact portion 621. Are formed.

The constituent material of the elastic piece 62 is not particularly limited. For example, various metal materials, rubber, elastomer,
Examples include various resins such as polyacetal and polyphenylene sulfide, superelastic materials, and combinations thereof.

Further, two long holes (through holes) 613 and 614 are formed in the cap body 61. These long holes 613 and 614 are connected through a hollow portion 615 to 1
They are arranged at 80 ° intervals. The long hole 613 extends from the distal end of the cap body 61 to the fitting portion 611,
14 extends from the distal end of the cap body 61 to between the distal end and the fitting portion 611.

As shown in FIGS. 2 and 3, the cap 6
Is located at a position (first position) covering at least the needle tip 41 of the inner needle 4, that is, when the elastic piece 62 faces the recovery direction, the elastic piece 62 613, 614 and the hollow portion 615. Thereby, even if the cap 6 tries to move to the base end side with respect to the inner needle 4, the contact portion 621 contacts the needle tip 41,
The movement of the cap 6 toward the proximal end is prevented.

On the other hand, as shown in FIG. 1, when the cap 6 is located near the inner needle hub 5 (second position), that is, when the puncture device 1 is assembled (assembled state), The protrusion 622 of the contact portion 621 of the elastic piece 62 abuts on the outer peripheral surface of the inner needle 4, whereby the elastic piece 62 is located on the outer peripheral side of the inner needle 4 in a state of being elastically deformed. That is,
The contact portion 621 is located on the outer peripheral side of the inner needle 4, whereby
The cap 6 can be moved with respect to the inner needle 4.

The flexible member 7 is a flexible (flexible) stretchable member that deforms following the deformation of the inner needle 4. One end (the proximal end) of the flexible member 7 is fixed to the distal end 51 of the inner needle hub 5, and the other end (the distal end) is fixed to the proximal end of the cap 6. That is, the inner needle hub 5 and the cap 6 are connected by the flexible member 7.

The flexible member 7 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured.

As shown in FIG. 5, in the present embodiment, the flexible member 7 has a cylindrical shape, and the inner needle 4 is inserted into the cylinder.

The constituent material of the flexible member 7 is not particularly limited, and examples thereof include polyethylene, polypropylene, polybutadiene, polyolefin such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, and the like.
Polyester such as polycarbonate, polyamide, polyethylene terephthalate and polybutylene terephthalate, resin materials such as polyacetal and polyphenylene sulfide, fiber materials such as carbon fiber and cotton yarn,
Examples include processed fiber materials such as nonwoven fabrics and woven fabrics, synthetic fibers, natural fibers, and various metal materials.

The flexible member 7 has a plurality of small-diameter portions 71 having a relatively small inner diameter along its axial direction (longitudinal direction).
Are provided intermittently. These small diameter portions 71 are arranged at equal intervals. The outer diameter of each small diameter portion 71 is
Each is smaller than the outer diameter in the vicinity.

By providing the small diameter portion 71, the adhesion between the flexible member 7 and the inner needle 4 (the followability of the flexible member 7 with respect to the inner needle 4) can be easily increased as shown in FIG. It can be contracted (folded in a bellows) as shown.

The flexible member 7 is manufactured, for example, as follows. First, as shown in FIG. 4, the portions corresponding to the small diameter portions 71 of the cylinder (cylindrical body) 70, which are indicated by dotted lines in FIG.

Next, portions slightly inside the above-mentioned fused portions (portions shown by dashed lines in FIG. 4) are removed, respectively.
As shown in FIG. 5, a plurality of notches 71 are provided intermittently. Thereby, the above-described flexible member 7 is obtained.

Outer needle hub 3, inner needle hub 5, and cap 6
The constituent material is not particularly limited, for example, polyethylene, polypropylene, polybutadiene, polyolefin such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, Examples thereof include polyesters such as polybutylene terephthalate, acrylic resins, ABS resins, AS resins, ionomers, polyacetals, resin materials such as polyphenylene sulfide, polyether ether ketone, various metal materials, and ceramics.

Here, when the puncture device 1 is assembled (assembled state), the inner needle 4 is inserted into the lumen of the outer needle 2 and the cap 6 is connected to the inner needle hub 5 as shown in FIG.
(The second position), the base end of the cap 6 is fitted into the rib 511 of the distal end 51 of the inner needle hub 5, and
The base end of the outer needle hub 3 is fitted into the fitting portion 611 of the cap 6, and the flange 31 of the outer needle hub 3 is fitted with the rib 6 of the fitting portion 611.
12 are engaged. Then, the flexible member 7 is contracted (folded in a bellows shape).

Next, an example of a method of using the puncture device 1 will be described in detail with reference to FIGS.

[1] While holding the puncture device 1 in the assembled state (assembled state) shown in FIG. 1, the inner needle 4 and the outer needle 2 are punctured into a blood vessel (vein or artery) of the patient.

When the tip 41 of the inner needle 4 is punctured into a blood vessel,
The blood flows backward in the inner needle 4 in the proximal direction due to the internal pressure (blood pressure) of the blood vessel, is introduced into the inner needle hub 5, and the flashback can be visually recognized through the inner needle hub 5 having visibility. . This makes it possible to know that the needle tip 41 of the inner needle 4 has secured a blood vessel.

Incidentally, with the inflow of the blood, the inner needle hub 5
The air inside is discharged through the ventilation filter 52,
Blood cannot pass through the ventilation filter 52 and does not leak to the outside.

[2] When the inner needle 4 and the outer needle 2 are further advanced in the distal direction by a small distance, the distal end of the outer needle 2 is inserted into the blood vessel. Thereby, the outer needle 2 secures a blood vessel.

At this time, as shown in FIG. 1, the flexible member 7 is in a contracted state (a state folded in a bellows shape).

The protrusion 6 of the contact portion 621 of the elastic piece 62
22 comes into contact with the outer peripheral surface of the inner needle 4, whereby the elastic piece 6
Numeral 2 is located on the outer peripheral side of the inner needle 4 in an elastically deformed state.

[3] As shown in FIG. 2, the inner needle hub 5 is pulled in the proximal direction with respect to the cap 6 while the outer needle 2 indwelled in the blood vessel is suppressed. The inner needle 4 and the inner needle hub 5 are moved to the proximal end side with respect to the outer needle 2, the outer needle hub 3 and the cap 6, respectively. Thereby, the inner needle 4 is withdrawn from the outer needle 2.

Then, when the needle tip 41 of the inner needle 4 passes through the projection 622 of the contact portion 621 of the elastic piece 62, the elastic piece 62 immediately returns to the shape shown in FIG. In the hollow portion 615 of the cap body 61, the inner needle 4 moves to the tip side from the needle tip 41 of the inner needle 4. Thus, the needle tip 41 of the inner needle 4 and its vicinity are covered by the cap 6 (safety is exhibited).

On the other hand, when the inner needle hub 5 moves toward the base end with respect to the cap 6, the flexible member 7 expands from the contracted state, and the inner needle 4 moves from the base end side. The flexible members 7 cover (are stored).

When the inner needle hub 5 is further pulled in the proximal direction with respect to the outer needle hub 3 from the state shown in FIG. 2, as shown in FIG. 3, the flexible member 7 slightly (for example, 1
When the inner needle hub 5 is further pulled in the proximal direction with respect to the outer needle hub 3, the cap 6 is moved toward the outer needle hub 3 by the flexible member 7. It is pulled toward the end and detaches from the outer needle hub 3.

As shown in FIG. 3, since the flexible member 7 is in the most extended state, the flexible member 7 prevents the cap 6 from moving toward the distal end.

Conversely, even if the cap 6 moves to the proximal end with respect to the inner needle 4, when the cap 6 slightly moves from the position shown in FIG. And the cap 6 is prevented from moving toward the proximal end.

As described above, the needle tip 41 of the inner needle 4
And its vicinity are covered with a cap 6, and the other part of the inner needle 4 is covered with a flexible member 7. That is, the entire inner needle 4 is covered with the cap 6 and the flexible member 7.

The inner peripheral surface of each small-diameter portion 71 of the flexible member 7 is in close contact with the inner needle 4, and the flexible member 7 can be deformed following the deformation of the inner needle 4.

[4] A connector or the like (not shown) of an infusion set is quickly connected to the outer needle hub 3 of the outer needle 2 from which the inner needle 4 has been removed, and administration of the infusion is started according to a standard method.

After the inner needle 4 has been removed from the outer needle 2, the puncture device 1 is no longer needed and is therefore disposed of.

In the puncture device 1, since the entire inner needle 4 is covered with the cap 6 and the flexible member 7, the puncture device 1 is prevented from being contaminated with blood adhered to the inner needle 4 or infected. be able to.

Further, since the needle tip 41 of the inner needle 4 is covered with the cap 6, it is possible to prevent a person who performs disposal processing from accidentally sticking a finger or the like with the needle tip 41.

Further, even if the inner needle 4 is deformed, the flexible member 7 deforms following the deformation of the inner needle 4.
The state in which the cap 6 covers the needle tip 41 of the inner needle 4 can be reliably held, and high safety is maintained.

An operation of extracting the inner needle 4 from the outer needle 2 and separating the outer needle hub 3 and the cap 6 (extracting operation).
And the operation of moving the inner needle 4 to the proximal end side with respect to the cap 6 and covering the needle tip 41 of the inner needle 4 with the cap 6 (storage operation) can be performed continuously (partially simultaneously). Good operability.

Also, the needle tip 41 of the inner needle 4 is
After the cover is covered, the outer needle hub 3 and the cap 6 are separated from each other, so that erroneous sticking can be more reliably prevented and safety is high.

Next, a second embodiment of the puncture device of the present invention will be described. FIGS. 6 and 7 are perspective views respectively showing an inner needle and a flexible member in a second embodiment of the puncture device of the present invention. The description of the common points with the puncture device 1 of the first embodiment will be omitted, and the main differences will be described. In the following description, the right side in FIGS. 6 and 7 is referred to as “distal end”, and the left side is referred to as “proximal end”.

As shown in these figures, the flexible member 7 of the puncture device 1 is provided along the longitudinal direction of the inner needle 4,
A plurality of rings 73 surrounding the outer periphery of the inner needle 4;
3 and a connecting portion 74 for connecting the two. Each ring 73
Are ring-shaped linear bodies, respectively.

The connecting portion 74 is constituted by one linear body or a plurality of linear bodies.

The constituent materials of the ring portion 73 and the connecting portion 74 are as follows.
There is no particular limitation, for example, the same as the flexible member 7 of the puncture device 1 of the first embodiment described above.

As shown in FIG. 6, when the cap 6 is located near the inner needle hub 5 (second position), that is, when the puncture device 1 is assembled (assembled state), it is flexible. The connecting portion 74 of the sex member 7 is in a contracted state.

On the other hand, as shown in FIG. 7, when the cap 6 is located at a position (first position) covering at least the needle tip 41 of the inner needle 4, the connecting portion 74 of the flexible member 7 is , In an extended state.

The flexible member 7 also deforms following the deformation of the inner needle 4 even if the inner needle 4 is deformed, similarly to the flexible member 7 of the puncture device 1 of the first embodiment described above. be able to.

According to the puncture device 1, the same effects as those of the puncture device 1 of the first embodiment can be obtained.

In the present invention, in addition to the flexible member 7, a not-shown expandable and contractible (particularly cylindrical) member may be provided, and these may be integrated. .

Thus, since the entire inner needle 4 is covered with the cap 6 and the extendable tubular member, it is possible to prevent the inner needle 4 from being contaminated or infected with blood adhered to the inner needle 4. it can.

Next, a third embodiment of the puncture device of the present invention will be described. 8 and 9 are perspective views showing the inner needle and the flexible member in the third embodiment of the puncture device of the present invention, respectively, and FIG. 10 is a plan view showing the flexible member shown in FIG. . The description of the common points with the puncture device 1 of the first embodiment will be omitted, and the main differences will be described.
In the following description, the right side in FIGS. 8 to 10 is referred to as “distal end”, and the left side is referred to as “proximal end”.

As shown in these figures, the flexible member 7 of the puncture device 1 is formed of a belt-like body having a plurality of holes (through holes) 75 into which the inner needle 4 is inserted. These holes 75 are arranged at equal intervals along the longitudinal direction of the flexible member 7.

Further, between the adjacent holes 75 of the flexible member 7, folds 76 are respectively provided. The directions of these folds 76 are set alternately.

The constituent material of the flexible member 7 is not particularly limited. For example, the same material as the flexible member 7 of the puncture device 1 of the first embodiment described above can be used.

As shown in FIG. 8, when the cap 6 is located near the inner needle hub 5 (second position), that is, when the puncture device 1 is assembled (assembled state), it is flexible. The sex member 7 is in a contracted state (a state folded in a bellows shape).

On the other hand, as shown in FIG. 9, when the cap 6 is located at a position (first position) covering at least the needle tip 41 of the inner needle 4, the flexible member 7 is in the expanded state. It is in.

The flexible member 7 also deforms following the deformation of the inner needle 4 even if the inner needle 4 is deformed, similarly to the flexible member 7 of the puncture device 1 of the first embodiment described above. be able to.

According to the puncture device 1, the same effects as those of the puncture device 1 of the first embodiment can be obtained.

In the present invention, in addition to the flexible member 7, a not-shown expandable and contractible tubular (particularly, cylindrical) member may be provided, and these may be integrated. .

As a result, the entire inner needle 4 is covered with the cap 6 and the expandable and contractible cylindrical member, so that contamination or infection with blood adhering to the inner needle 4 can be prevented. it can.

In the present invention, as shown in FIG.
Notches 77 may be provided at both ends of each fold 76 of the flexible member 7. Thereby, the flexible member 7 can be easily folded in a bellows shape.

In the present invention, for example, the flexible member 7
Alternatively, the flexible member 7 may be curved without providing the fold line 76.

The puncture device according to the present invention has been described with reference to the illustrated embodiments. However, the present invention is not limited to this embodiment, and each part constituting the puncture device may have any function that can exhibit the same function. Can be replaced with the one having the configuration of

For example, in the present invention, any configurations of the above embodiments may be appropriately combined.

In the present invention, part or all of the flexible member 7 may be formed of a material (member) having good blood absorbability.

The puncture device of the present invention is not limited to an indwelling needle assembly having an outer needle and an inner needle, but may be a puncture needle such as an injection needle.

[0116]

As described above, according to the present invention, at least the tip of the used inner needle (needle) can be covered with the cap with a simple operation, quickly and safely, and the disposal process can be performed. In this case, it is possible to provide a puncture device that is extremely excellent in sanitary and safety aspects, by preventing blood contamination, infection, and the like, without accidentally piercing a finger or the like with a needle tip.

In particular, even if the inner needle (needle) is deformed, the flexible member is deformed following the deformation of the inner needle (needle). The covering state can be reliably maintained, and high safety is maintained.

Further, the present invention can achieve the above effects with a small and simple structure and a small number of parts.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a puncture device of the present invention.

FIG. 2 is a sectional view showing a first embodiment of the puncture device of the present invention.

FIG. 3 is a sectional view showing a first embodiment of the puncture device of the present invention.

FIG. 4 is a view showing a manufacturing process of the flexible member of the puncture device shown in FIG.

FIG. 5 is a perspective view showing an inner needle and a flexible member of the puncture device shown in FIG.

FIG. 6 is a perspective view showing an inner needle and a flexible member according to a second embodiment of the puncture device of the present invention.

FIG. 7 is a perspective view showing an inner needle and a flexible member in a puncture device according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing an inner needle and a flexible member according to a third embodiment of the puncture device of the present invention.

FIG. 9 is a perspective view showing an inner needle and a flexible member according to a third embodiment of the puncture device of the present invention.

FIG. 10 is a plan view showing the flexible member shown in FIG.

FIG. 11 is a plan view showing another configuration example of the flexible member according to the present invention.

FIG. 12 is a side view showing a conventional puncture device.

FIG. 13 is a side view showing a conventional puncture device.

FIG. 14 is a side view showing a conventional puncture device.

FIG. 15 is a side view showing a conventional puncture device.

[Explanation of Symbols] 1 puncture device 2 outer needle 21 tip opening 3 outer needle hub 31 flange 4 inner needle 41 needle tip 5 inner needle hub 51 tip portion 511 rib 52 ventilation filter 53 flange 6 cap 61 cap body 611 fitting portion 612 Rib 613, 614 Long hole 615 Hollow part 62 Elastic piece 621 Contact part 622 Projection 7 Flexible member 70 Cylinder 71 Small diameter part 72 Notch 73 Ring part 74 Connecting part 75 Hole part 76 Fold 77 Notch 100 Puncturing tool 110 Needle 111 Needle point 120 Inner needle hub 130 Cap 140 Stretchable member

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masaaki Kasai 1727 Tsukiji Arai, Showa-cho, Nakakoma-gun, Yamanashi 1 Terumo F-term (reference) 4C066 AA07 BB01 CC01 FF04 KK05 NN04 NN07

Claims (15)

[Claims] A needle having a sharp needle tip; a hub installed at a proximal end of the needle; and a needle capable of covering at least the needle tip of the needle, and the needle along the needle. A puncture device comprising: a cap movably installed in a longitudinal direction; and a flexible member provided between the hub and the cap, the flexible member being deformed following deformation of the needle. 2. The puncture device according to claim 1, further comprising a hollow outer needle through which the needle can be inserted. 3. The puncture device according to claim 2, wherein an outer needle hub is provided at a base end of the outer needle, and the cap is configured to be detachable from the outer needle hub. 4. The flexible member is in a contracted state when the cap is located near the hub.
The puncture device according to any one of claims 1 to 3, wherein the flexible member is in an extended state when the cap is located at a position covering at least a needle tip of the needle. 5. The cap according to claim 1, wherein the cap has a cylindrical cap body into which the needle is inserted, and a cap which is located at a position covering at least a needle tip of the needle, and is provided at a base end side of the cap. The puncture device according to any one of claims 1 to 4, further comprising a movement inhibiting means for inhibiting movement. 6. The movement inhibiting means is constituted by an elastic piece having an abutting portion which abuts on the tip of the needle to prevent the cap from moving toward the proximal end, wherein the cap is provided on the hub. When it is located nearby,
When the contact portion is located on the outer peripheral side of the needle, and the cap is located at a position covering at least the needle tip of the needle, the restoring force of the elastic piece causes the contact portion to move within the hollow portion of the cap body. The puncture device according to claim 5, wherein the puncture device moves toward the distal end from the needle tip of the needle. 7. The flexible member has a tubular shape,
The puncture device according to any one of claims 1 to 6, wherein the needle is inserted into the cylinder. 8. The puncture device according to claim 7, wherein the flexible member is provided with a small-diameter portion having a relatively small inner diameter intermittently along an axial direction thereof. 9. The puncture device according to claim 8, wherein an outer diameter of the small diameter portion is smaller than an outer diameter near the small diameter portion. 10. The flexible member is provided along a longitudinal direction of the needle, and includes a plurality of ring portions surrounding the outer periphery of the needle, and a connecting portion connecting the plurality of ring portions. The puncture device according to any one of claims 1 to 6. 11. The puncture device according to claim 10, wherein the annular portion is formed by making a linear body into an annular shape. 12. The puncture device according to claim 10, wherein the connecting portion is formed of at least one linear body. 13. The flexible member according to claim 1, wherein the flexible member is provided along a longitudinal direction thereof, and is formed of a band having a plurality of holes into which the needles are inserted. Puncture device. 14. The strip is folded when the cap is located near the hub.
The puncture device according to 3. 15. The puncture device according to claim 1, wherein the cap is detachably attached to the hub.