JP2002085558A - Puncture tool and retention needle assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a puncture tool and a retention needle assembly, with which the tip of a needle body can be prevented from jumping out of a protector and safety in disposal, or the like, is improved. SOLUTION: The retention needle assembly 1 is constituted with an outer needle with hub composed of an outer needle, which is a retention needle, and an outer needle hub provided at the base end part of the outer needle, an inner needle with hub composed of an inner needle 5 (needle body) to be used while being inserted into the outer needle and an inner needle hub provided at the base end part of the inner needle 5, and a protector 8 capable of housing a needle tip 51 of the inner needle 5. The protector 8 is provided with a first portion 81 and a second portion 82 existent through a link part 83 to this first portion 81. On a top end wall 811 of the first portion 81, side walls 812 and 813 are formed. Even when the first portion 81 tries to be deviated from the second portion 82 in the y-axis direction, the side wall 812 or 813 is abutted to a top end wall 821 of the second portion 82. Thus, the deviation is prevented (blocked) and the needle tip 51 is prevented from being protruded from a position close to the top end of the protector to the side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a puncture device and an indwelling needle assembly. More specifically, for example, the present invention relates to a puncture device used for puncturing a blood vessel during infusion or blood collection, and an indwelling needle assembly provided with the puncture device.

[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 an indwelling needle has a hollow outer needle,
An outer needle hub fixed to the proximal end of the outer needle, an inner needle inserted into the outer needle and having a sharp needle tip at a distal end, and an inner needle hub fixed to the proximal end of the inner needle. ing.

When puncturing the indwelling needle into a patient's blood vessel, the inner needle is inserted into the outer needle, and the puncture operation is performed with the needle tip of the inner needle protruding 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, but if it is discarded as it is, there is a possibility that an accident may occur in which a discarding worker or the like accidentally points a finger or the like with the tip of the inner needle. In particular, since blood adheres to and remains on the surface and inside of the inner needle, infection may occur due to such a stab.

[0006] In order to solve this problem, there has been proposed an indwelling needle provided with a protector which is movable relative to the inner needle and the inner needle hub and is capable of accommodating the needle point of the inner needle.

FIGS. 13 and 14 are perspective views showing the structure of a conventional indwelling needle protector.

As shown in FIG. 13, the conventional indwelling needle 100
The protector 120 is formed by bending a leaf spring, and in the assembled state (not shown), the distal end side (the left side in FIG. 13) is urged by the restoring force in the closing direction.

In the indwelling needle 100, when the inner needle 110 is pulled out from the outer needle (not shown), the protector 120
The needle tip 111 of the inner needle 110 is accommodated in the protector 120 as shown in FIG.

[0010] Once the needle tip 111 of the inner needle 110 is stored in the protector 120, the protector 12
0 is closed, so that the protector 120 is
Even if it attempts to move to the base end side (the right side in FIG. 13) with respect to 0, the distal end side of the protector 120 abuts on the needle tip 111, whereby the state where the needle tip 111 is stored in the protector 120 is maintained. You.

By installing the protector 120, it is possible to prevent an accident such that a discarding worker or the like accidentally stabs a finger or the like with the needle tip 111 of the inner needle 110.

However, in the indwelling needle 100, when the protector 120 is oriented in the direction shown in FIG. 13 and the inner needle 110 is pushed forward while the protector 120 is pressed against the body surface 130, as shown in FIG. Is shifted (opened) in the vertical direction (the direction of the arrow) in FIG. 14, and the needle tip 111 of the inner needle 110 is
In some cases, it may jump out from the vicinity of the leading end of zero.

[0013]

SUMMARY OF THE INVENTION An object of the present invention is to provide a puncture device and an indwelling needle assembly which can prevent the needle tip of the needle body from jumping out of the protector and which is highly safe in disposal and the like. It is in.

[0014]

This and other objects are achieved by the present invention which is defined below as (1) to (22).

(1) A puncture device having a needle body having a sharp needle tip at the tip, and a protector which is installed so as to be relatively movable with respect to the needle body and can store the needle tip of the needle body. The protector has a first position allowing the needle to move relative to the protector, and a second position accommodating the needle of the needle and preventing the needle from passing therethrough. A puncture device comprising a needle tip protrusion preventing means for preventing the needle tip of the needle body from projecting to the side of the protector when the protector is in the second posture. .

(2) The protector includes a first part, a second part, and a connecting part for connecting the first part and the second part. The tip side is configured to be able to open and close by the displacement of the second portion, and in the first posture, the tip side is opened,
The puncture device according to (1), wherein the distal end side is closed in the second posture.

(3) The needle tip protrusion preventing means is arranged such that, in the second posture, the second portion is substantially perpendicular to the opening and closing direction of the protector; The puncture device according to (2), which is configured to prevent the needle from shifting in a direction substantially perpendicular to the longitudinal direction of the needle.

(4) In the second posture, the needle tip protrusion preventing means is such that the second portion is substantially perpendicular to the first portion with respect to the opening and closing direction of the protector, and It has a contact portion provided so that one of the first portion and the second portion is in contact with the other when the needle is to be shifted in a direction substantially perpendicular to the longitudinal direction of the needle body. The puncture device according to (2).

(5) In the second position, the needle tip protrusion preventing means is substantially perpendicular to the opening / closing direction of the protector and substantially perpendicular to the longitudinal direction of the needle body. The puncture device according to the above (2), having a contact portion that comes into contact with the needle tip when the needle tip of the needle body moves.

(6) The puncture device according to (5), wherein the contact portion is provided on at least one side of the first portion and the second portion.

(7) In the second position, the needle tip protrusion preventing means is substantially perpendicular to the opening / closing direction of the protector and substantially perpendicular to the longitudinal direction of the needle body. The puncture device according to the above (2), wherein at least one of the first part and the second part follows the movement of the needle tip when the needle tip of the needle body moves.

(8) The following is performed by the needle body abutting on a portion between at least one of the first portion and the second portion between the distal end and the proximal end. ).

(9) The protector according to any one of (1) to (8), wherein the protector is displaced to the first position by elastic deformation and is displaced to the second position by its restoring force. Puncture tool.

(10) The puncture device according to any one of (1) to (9), wherein the protector is formed by processing a plate-like elastic body.

(11) The puncture device according to any one of the above (1) to (10), further comprising detachment preventing means for preventing detachment of the protector from the needle body.

(12) An indwelling needle assembly having the puncture device according to any of the above (1) to (11),
The needle body is a tubular inner needle having an inner needle hub at a base end side, and includes a hollow outer needle into which the inner needle can be inserted, and an outer needle hub installed at a base end of the outer needle. An indwelling needle assembly characterized by the above-mentioned.

(13) The indwelling needle assembly according to (12), wherein the protector is located inside the outer needle hub when the indwelling needle assembly is in an assembled state.

(14) A protector which is connected to a first part and a second part via a connecting part and is capable of accommodating a needle tip of a needle body between the first part and the second part. Wherein the first part and the second part are elastically displaceable, and at least one of the first part and the second part contacts a needle tip of the needle body. A stylus stop portion provided in contact with the stylus, and a stylus protruding preventing means for preventing the stylus of the stylus from protruding to the side of the protector when the stylus of the stylus is stored. Protector.

(15) The stylus protruding prevention means may be arranged such that the second portion is substantially perpendicular to the first portion with respect to the direction of displacement of the first portion, and the longitudinal direction of the needle body. The protector according to the above (14), which is configured to prevent displacement in a substantially vertical direction.

(16) The stylus protruding preventing means may be configured such that the second portion is substantially perpendicular to the first portion with respect to the direction of displacement of the first portion and the longitudinal direction of the needle body. The protector according to (14), further including a contact portion provided so that one of the first portion and the second portion contacts the other when the first portion and the second portion are shifted in a substantially vertical direction. .

(17) The needle tip protrusion preventing means is substantially perpendicular to the direction of displacement between the first portion and the second portion, and substantially perpendicular to the longitudinal direction of the needle body. The protector according to the above (14), further comprising a contact portion that comes into contact with the needle tip when the needle tip of the needle body moves in an appropriate direction.

(18) The protector according to (17), wherein the contact portion is provided on at least one side of the first portion and the second portion.

(19) The needle tip protrusion preventing means is substantially perpendicular to the direction of displacement between the first portion and the second portion and substantially perpendicular to the longitudinal direction of the needle body. (14) above, wherein when the needle tip of the needle body moves in any direction, at least one of the first portion and the second portion follows the movement of the needle tip. Protector.

(20) The following is performed by the needle body abutting on a portion between at least one of the first portion and the second portion between the distal end and the proximal end. ).

(21) The connecting portion is provided with a hole through which the needle is inserted.
0) The protector according to any one of the above.

(22) The protector according to any one of (14) to (21), wherein the first portion and the second portion intersect.

[0037]

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

<First Embodiment> FIGS. 1 and 2 are longitudinal sectional views showing a first embodiment in which the puncture device of the present invention is applied to an indwelling needle assembly, and FIGS. It is a perspective view which shows the structure of the protector with which the indwelling needle assembly of 1st Embodiment is provided, respectively. In the following description, the right side in FIGS.

For convenience of explanation, in FIGS. 1 to 4, the longitudinal direction of an inner needle (needle body) 5, which will be described later, is the z-axis direction, and the opening and closing direction of the protector 8 (the first portion 81 and the second portion 8
X which are orthogonal to each other, where x is the direction of displacement
Assume the axes, y-axis and z-axis.

The indwelling needle assembly (puncture needle assembly) shown in FIG.
Reference numeral 1 denotes an indwelling needle assembly which includes an outer needle and an inner needle, and particularly forms an indwelling needle assembly for infusion.
An outer needle 4 with a hub constituted by an outer needle hub 3 provided at the base end of the outer needle 2, an inner needle (needle body) 5 used by being inserted into the outer needle 2, An inner needle 7 with a hub constituted by an inner needle hub 6 provided at the base end of the needle 5, and a needle tip 5 of the inner needle 5;
And a protector 8 capable of storing (covering) 1.
Of these, the inner needle with hub 7 and the protector 8 constitute the puncture device of the present invention. 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.

All or a part of the outer needle 2 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 in which the outer diameter gradually decreases toward the distal end in order to puncture the living body easily and with minimal invasion.

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 and the inside of the outer needle hub 3 communicate with each other. The outer needle hub 3 is a substantially cylindrical member, and has a tapered shape whose outer diameter and inner diameter gradually increase toward the base end. This tapered portion is used for an inner needle hub 6 described later.
With the distal end portion 64.

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 outer needle 2 is fixed to the outer needle hub 3 by a method such as caulking, fusing (heat fusing, high frequency fusing, etc.) or bonding with an adhesive.

The inner needle 5 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 51 is formed at the tip of the inner needle 5. The shape of the needle tip 51 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 5.

In the vicinity of the distal end of the inner needle 5, a flattened flat portion (separation preventing means) 52 is formed. The dimensions of the flat portion 52 are set so that the flat portion 52 can pass through the lumen of the outer needle 2 and cannot pass through a hole 831 of the protector 8 described later.

The flat portion 52 prevents (blocks) the detachment of the protector 8 from the inner needle 5.

The inner needle 5 is inserted into the lumen of the outer needle 2,
Further, it is used in a state where the inner needle hub 6 is fitted to the outer needle hub 3, that is, the state shown in FIG. Hereinafter, this state is referred to as an “assembled state”.

The length of the inner needle 5 is such that at least the needle tip 51 protrudes from the distal end opening 21 of the outer needle 2 when assembled.

The proximal end of the inner needle 5 is fixed to the distal end of the inner needle hub 6, and the lumen of the inner needle 5 communicates with the inner space of the inner needle hub 6. The inner needle hub 6 is formed of a substantially cylindrical hollow member.

The method for fixing the inner needle 5 to the inner needle hub 6 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 6 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 51 secures a blood vessel, it is possible to visually check the flashback of the blood flowing through the inner needle 5.

A flange 61 is formed on the outer periphery of the inner needle hub 6. For example, when the operation of pulling out the inner needle 5 from the outer needle 2 is performed by hooking a finger on the flange 61 and performing this operation, this operation can be performed more reliably.

The distal end portion 64 of the inner needle hub 6 has a shape capable of fitting with the outer needle hub 3. For example, the tip 6
4 has a tapered shape whose outer diameter gradually decreases toward the tip.

The distal end of the distal end portion 64 is configured to simply contact the proximal end of the protector 8 described later.

On the outer periphery of the distal end portion 64 of the inner needle hub 6 on the base end side, there is formed a ring-shaped projecting portion 63 which is fitted with the base end edge of the outer needle hub 3.

A ventilation filter 62 is provided at an opening at the base end of the inner needle hub 6 so as to cover the opening. The ventilation filter 62 has a property of transmitting gas but blocking liquid.

Specific examples of the ventilation filter 62 include 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 constituent materials of the outer needle hub 3 and the inner needle hub 6 are not particularly limited, and may be, for example, polyolefin such as polyethylene, polypropylene, polybutadiene, ethylene-vinyl acetate copolymer, polyvinyl chloride, and the like.
Polyesters such as polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polybutylene terephthalate, acrylic resins, ABS resins, AS resins, ionomers, polyacetals, polyphenylene sulfides, and various resin materials such as polyetheretherketone. Can be

The protector 8 has a first portion 81 and a second portion 81 connected to the first portion 81 via a connecting portion 83.
Are formed integrally by bending (working) a plate-like member (elastic body) having elasticity (elastic deformation).

The protector 8 accommodates a first posture (the posture shown in FIGS. 1 and 3) allowing the inner needle 5 to move with respect to the protector 8 and a needle tip 51 of the inner needle 5. It is deformed (displaced) to a second posture (posture shown in FIGS. 2 and 4) that blocks passage of the tip 51. Hereinafter, the protector 8 will be described.

The connecting portion 83 forms a base end of the protector 8, and a hole 831 through which the inner needle 5 is inserted is formed at the center of the connecting portion 83. Flat portion 5 of inner needle 5
2 is located on the tip side from the hole 831.

The tip of the first portion 81 is bent toward the second portion 82 (the lower side in FIGS. 3 and 4).
Side walls (contact portions) 812 and 813 protruding toward the base end are formed at both ends (both sides) of the distal end wall (needle stopper) 811 in the y-axis direction, respectively.

The tip of the second portion 82 is bent toward the first portion 81 (upward in FIGS. 3 and 4).
This tip wall (needle stopper) 821 is in the second position in FIG.
As shown in the figure, it is located on the base end side of the distal end wall 811 and between the side walls 811 and 812.

In the assembled state, the protector 8 is
And a first posture shown in FIG. That is, as shown in FIG. 3, the distal end side of the protector 8 is opened by displacing the second part 82 with respect to the first part 81 so that the distal end sides are away from each other, and the inner needle 5 is connected to the distal end wall 811. It is located between the end wall 821 and the end wall 821. At this time, the protector 8
It is elastically deformed and is urged in a direction in which the tip side closes by its restoring force.

In this assembled state, as described above,
The inner needle 5 can move in the z-axis direction relative to the protector 8.

In this assembled state, the base end of the protector 8 contacts the distal end portion 64 of the inner needle hub 6, and the distal end of the protector 8 contacts the inner surface of the outer needle hub 3, and the friction caused by the friction. The protector 8 is detachably supported on the outer needle hub 3. That is, the protector 8
It is located inside the inner needle hub 6.

The inner needle hub 6 and the inner needle 5 are moved to the proximal side with respect to the protector 8 so that the tip 51 of the inner needle 5 is
11 and 821, the distal end side of the protector 8 is closed by its restoring force as shown in FIG.
Is displaced). That is, the protector 8
The second posture shown in FIGS. 2 and 4 is taken.

As a result, the needle tip 51 of the inner needle 5 is housed in the protector 8, and even if the inner needle 5 attempts to move toward the distal end with respect to the protector 8, the needle tip 51 contacts the distal end wall 811 or 821. Contact and its movement is blocked. That is, the protrusion of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

On the other hand, the flat portion 52 of the inner needle 5 is located near the hole 831 of the protector 8, and the flat needle 52 is caught by the hole 831, so that the inner needle 5 is Cannot move to the end. That is, detachment of the protector 8 from the inner needle 5 is prevented (blocked).

Even if the first portion 81 is displaced in the y-axis direction with respect to the second portion 82 (even if the distal end of the protector 8 is opened in the y-axis direction), the side wall of the first portion 81 812 or 813 is the tip wall 82 of the second portion 82
1, thereby preventing (blocking) the displacement. This prevents (blocks) the needle tip 51 from protruding sideways from near the tip of the protector 8.

Therefore, the end wall 821 and the side wall 81
2 and 813 constitute a stylus tip prevention means.

In this way, the needle tip 51 is connected to the protector 8
Can be reliably prevented from protruding.

The constituent materials of the protector 8 are not particularly limited. For example, polyolefins such as polyethylene, polypropylene, polybutadiene, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene,
Polymethyl methacrylate, polycarbonate, polyamide, polyester such as polyethylene terephthalate, polybutylene terephthalate, acrylic resin, ABS
Various resin materials such as resin, AS resin, ionomer, polyacetal, polyphenylene sulfide, polyether ether ketone, stainless steel, aluminum alloy,
Various metal materials such as copper or a copper-based alloy, titanium or a titanium alloy, and the like are listed, and among these, various metal materials are preferable.

The protector 8 is composed of a plurality of members (parts).
Needless to say, it may be constituted by

Next, an example of a method of using the indwelling needle assembly 1 will be described in detail. [1] With the indwelling needle assembly 1 in the assembled state, the inner needle 5 and the outer needle 2 are punctured into a patient's blood vessel (vein or artery) while holding the inner needle hub 6 and the like by hand.

[2] When the needle tip 51 of the inner needle 5 is punctured into a blood vessel, the blood flows backward in the inner needle 5 due to the internal pressure (blood pressure) of the blood vessel and is introduced into the inner needle hub 6. This flashback can be visually recognized through the inner needle hub 6 having visibility. This makes it possible to know that the needle tip 51 of the inner needle 5 has secured a blood vessel.

Note that with the inflow of the blood, the inner needle hub 6
The air inside is exhausted through the ventilation filter 62,
Blood cannot pass through the ventilation filter 62 and does not leak to the outside.

[3] When the inner needle 5 and the outer needle 2 are further advanced in the distal direction by a small distance, the distal opening 21 of the outer needle 2 is inserted into the blood vessel. Thereby, the outer needle 2 secures a blood vessel.

[4] While holding down the outer needle 2 placed in the blood vessel by hand, grasp the inner needle hub 6 with the other hand and pull in the proximal direction. Thereby, the inner needle 5 is withdrawn from the outer needle 2.

[5] When the inner needle hub 6 is further pulled in the proximal direction, as described above, the needle tip 51 of the inner needle 5 passes through the distal end walls 811 and 821, and as shown in FIGS. , The tip side of the protector 8 is closed by its restoring force.

As a result, the needle tip 51 of the inner needle 5 is housed in the protector 8, and even if the needle tip 51 attempts to move back to the tip direction, the needle tip 51 comes into contact with the tip wall 811 or 821. You can't go back.

[6] At about the same time when the distal end side of the protector 8 is closed, the flat portion 52 of the inner needle 5 is
When the inner needle 5 and the protector 8 are integrated with each other, the inner needle 5 and the protector 8 are integrated with the outer needle hub 3 when the inner needle hub 6 is further pulled in the proximal direction.
Removed from inside. That is, the inner needle 7 with the hub, whose needle tip 51 is accommodated in the protector 8, and the outer needle 4 with the hub are separated.

The needle tip 51 of the inner needle 7 with a hub is housed in the protector 8, and the projection of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

Further, even if the first portion 81 is deviated from the second portion 82 in the y-axis direction, the side wall 812 or 813 of the first portion 81 is not
1, thereby preventing (blocking) the displacement. This prevents (blocks) the needle tip 51 from protruding sideways from near the tip of the protector 8.

Further, since the flat portion 52 of the hub-attached inner needle 7 is caught by the hole 831 of the protector 8, the hub-attached inner needle 7 cannot move in the proximal direction with respect to the protector 8. Thereby, detachment of the protector 8 from the inner needle 5 is prevented (blocked).

[7] A connector or the like (not shown) of an infusion set is quickly connected to the outer needle hub 3 of the outer needle 4 with the hub from which the inner needle 5 has been removed, and the administration of the infusion is started according to a standard method. .

After the inner needle 5 is removed from the outer needle 2 in this manner, the inner needle 7 with a hub becomes unnecessary, and is therefore disposed of.

As described above, the indwelling needle assembly 1
According to this, the needle tip 51 of the inner needle 7 with hub removed from the outer needle 4 with hub is housed in the protector 8, and in particular, the needle tip 51 projects from the tip of the protector 8, Since the protector 8 does not move away from the inner needle 5 by moving in the proximal direction, an accident such as a person who performs disposal processing accidentally stabbing a finger or the like with the needle tip 51 is prevented.

<Second Embodiment> Next, a second embodiment of the indwelling needle assembly of the present invention will be described.

FIG. 5 is a perspective view showing the configuration of the protector (second posture of the protector) provided in the indwelling needle assembly according to the second embodiment.

Hereinafter, the indwelling needle assembly 1 of the second embodiment will be described focusing on the differences from the above-described first embodiment, and the description of the same items will be omitted. In the following description, the right side in FIG. 5 is referred to as a “proximal end” and the left side is referred to as a “distal end”.

Further, for convenience of explanation, in FIG. 5, the longitudinal direction of the inner needle (needle body) 5 is the z-axis direction, and the opening and closing direction of the protector 8 is the x-axis direction, as in the first embodiment described above. , An x-axis, a y-axis, and a z-axis orthogonal to each other are assumed.

The indwelling needle assembly 1 according to the second embodiment is the same as the above-described first embodiment except that the configuration of the protector 8 is different.

That is, the indwelling needle assembly 1 of the second embodiment
Then, as shown in FIG.
1 and the second portion 82 are each substantially U-shaped,
They are crossing.

The distal end of the first portion 81 is bent at two locations toward the second portion 82, and is located at both ends (both sides) of the substantially L-shaped distal wall 811 in the y-axis direction. Are side walls (contact portions) 812 protruding toward the base end side, respectively.
And 813 are formed.

In the indwelling needle assembly 1, similarly to the indwelling needle assembly 1 of the above-described first embodiment, the inner needle 5 is placed in the second position in which the needle tip 51 of the inner needle 5 is stored in the protector 8. Even when the needle 5 moves toward the distal end with respect to the protector 8, the needle tip 51 contacts the corner 814 of the distal end wall 811, and the movement is prevented. That is, the protrusion of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

Even if the first portion 81 is displaced in the y-axis direction with respect to the second portion 82 (even if the distal end side of the protector 8 is opened in the y-axis direction), the side wall of the first portion 81 812 or 813 is the tip wall 82 of the second portion 82
1, thereby preventing (blocking) the displacement. This prevents (blocks) the needle tip 51 from protruding sideways from near the tip of the protector 8.

According to the indwelling needle assembly 1, the same effects as those of the indwelling needle assembly 1 of the first embodiment described above can be obtained.

<Third Embodiment> Next, a third embodiment of the indwelling needle assembly of the present invention will be described.

FIG. 6 is a perspective view showing a configuration of a protector (a second posture of the protector) provided in the indwelling needle assembly according to the third embodiment.

Hereinafter, the indwelling needle assembly 1 of the third embodiment will be described focusing on the differences from the first embodiment described above, and the description of the same items will be omitted. In the following description, the right side in FIG. 6 is referred to as a “proximal end” and the left side is referred to as a “distal end”.

Further, for convenience of explanation, in FIG. 6, the longitudinal direction of the inner needle (needle body) 5 is the z-axis direction, and the opening and closing direction of the protector 8 is the x-axis direction, as in the first embodiment described above. , An x-axis, a y-axis, and a z-axis orthogonal to each other are assumed.

The indwelling needle assembly 1 of the third embodiment is the same as the above-described first embodiment except that the structure of the protector 8 is different.

That is, the indwelling needle assembly 1 of the third embodiment
Then, as shown in FIG. 6, the tip of the first portion 81 is
It is bent at two places toward the second part 82 (lower side in FIG. 6). At both ends (both sides) of the substantially L-shaped distal wall 811 in the y-axis direction and at positions corresponding to the corners 814, the side walls (abutment) protruding toward the proximal end are respectively provided. Parts) 812 and 813 are formed. Each of the side walls 812 and 813 is formed so as to cover the corner 814 from the side (the y-axis direction).

In the indwelling needle assembly 1, similarly to the indwelling needle assembly 1 of the first embodiment described above, the inner needle 5 is placed in the second position in which the needle tip 51 of the inner needle 5 is stored in the protector 8. Even when the needle 5 moves toward the distal end with respect to the protector 8, the needle tip 51 contacts the corner 814 of the distal end wall 811, and the movement is prevented. That is, the protrusion of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

In the indwelling needle assembly 1, the inner needle 5
When the needle tip 51 moves in the y-axis direction with respect to the first portion 81, the needle tip 51 comes into contact with the side wall 812 or 813 of the first portion 81. It protrudes laterally from the vicinity, but is prevented (blocked).

Therefore, the side walls 812 and 813
Thereby, the needle tip protrusion prevention means is configured.

According to the indwelling needle assembly 1, the same effects as those of the indwelling needle assembly 1 of the first embodiment can be obtained.

<Fourth Embodiment> Next, a fourth embodiment of the indwelling needle assembly of the present invention will be described.

FIG. 7 is a perspective view showing the structure of a protector (second posture of the protector) provided in the indwelling needle assembly according to the fourth embodiment.

Hereinafter, the indwelling needle assembly 1 of the fourth embodiment will be described focusing on the differences from the above-described third embodiment, and the description of the same items will be omitted. In the following description, the right side in FIG. 7 is referred to as a “proximal end” and the left side is referred to as a “distal end”.

For convenience of explanation, in FIG. 7, the longitudinal direction of the inner needle (needle body) 5 is set to the z-axis direction, and the opening and closing direction of the protector 8 is set to the x-axis direction, as in the third embodiment described above. , An x-axis, a y-axis, and a z-axis orthogonal to each other are assumed.

The indwelling needle assembly 1 of the fourth embodiment is the same as the above-described third embodiment except that the structure of the protector 8 is different.

That is, the indwelling needle assembly 1 of the fourth embodiment
Then, as shown in FIG. 7, the first portion 8 of the protector 8
1 and the second portion 82 are each substantially U-shaped,
They are crossing.

In the indwelling needle assembly 1, similarly to the indwelling needle assembly 1 of the third embodiment described above, the inner needle 5 is placed in the second position in which the needle tip 51 of the inner needle 5 is stored in the protector 8. Even when the needle 5 moves toward the distal end with respect to the protector 8, the needle tip 51 contacts the corner 814 of the distal end wall 811, and the movement is prevented. That is, the protrusion of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

Further, the tip 51 of the inner needle 5 is
When the needle tip 51 moves in the y-axis direction, the needle tip 51 comes into contact with the side wall 812 or 813 of the first portion 81, thereby preventing the needle tip 51 from protruding laterally from near the tip of the protector 8. (Blocked).

According to the indwelling needle assembly 1, the same effects as those of the indwelling needle assembly 1 of the third embodiment can be obtained.

<Fifth Embodiment> Next, a fifth embodiment of the indwelling needle assembly of the present invention will be described.

FIG. 8 is a perspective view showing the structure of the protector (second posture of the protector) provided in the indwelling needle assembly according to the fifth embodiment.

Hereinafter, the indwelling needle assembly 1 according to the fifth embodiment will be described focusing on the differences from the above-described fourth embodiment, and the description of the same items will be omitted. In the following description, the right side in FIG. 8 is referred to as a “proximal end” and the left side is referred to as a “distal end”.

For convenience of explanation, in FIG. 8, as in the fourth embodiment, the longitudinal direction of the inner needle (needle body) 5 is the z-axis direction, and the opening and closing direction of the protector 8 is the x-axis direction. , An x-axis, a y-axis, and a z-axis orthogonal to each other are assumed.

The indwelling needle assembly 1 of the fifth embodiment is the same as the above-described fourth embodiment except that the structure of the protector 8 is different.

That is, the indwelling needle assembly 1 of the fifth embodiment
Then, as shown in FIG. 8, the first portion 8 of the protector 8
8, a plate-shaped protruding portion 815 protruding toward the intersection of the first portion 81 and the second portion 82 at the lower side of FIG.
Are formed.

Similarly, a first portion 81 and a second portion 8 are provided on the upper end of the protector 8 in FIG.
A plate-shaped protruding portion 822 protruding toward the intersection with the second portion 2 is formed.

In the indwelling needle assembly 1, similarly to the indwelling needle assembly 1 of the above-described fourth embodiment, the inner needle 5 is placed in the second position in which the needle tip 51 of the inner needle 5 is stored in the protector 8. Even when the needle 5 moves toward the distal end with respect to the protector 8, the needle tip 51 contacts the corner 814 of the distal end wall 811, and the movement is prevented. That is, the protrusion of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

Further, the tip 51 of the inner needle 5 is
When the needle tip 51 moves in the y-axis direction, the needle tip 51 comes into contact with the side wall 812 or 813 of the first portion 81, thereby preventing the needle tip 51 from protruding laterally from near the tip of the protector 8 ( Blocked).

According to the indwelling needle assembly 1, the same effect as that of the indwelling needle assembly 1 of the fourth embodiment can be obtained.

<Sixth Embodiment> Next, a sixth embodiment of the indwelling needle assembly of the present invention will be described.

FIG. 9 is a perspective view showing the structure (a second posture of the protector) of a protector provided in the indwelling needle assembly according to the sixth embodiment.

Hereinafter, the indwelling needle assembly 1 of the sixth embodiment will be described focusing on the differences from the above-described third embodiment, and the description of the same items will be omitted. In the following description, the right side in FIG. 9 is referred to as “proximal end”, and the left side is referred to as “distal end”.

For convenience of explanation, in FIG. 9, the longitudinal direction of the inner needle (needle body) 5 is the z-axis direction, and the opening and closing direction of the protector 8 is the x-axis direction, as in the third embodiment described above. , An x-axis, a y-axis, and a z-axis orthogonal to each other are assumed.

The indwelling needle assembly 1 of the sixth embodiment is the same as the above-described third embodiment except that the structure of the protector 8 is different.

That is, the indwelling needle assembly 1 of the sixth embodiment
Then, as shown in FIG. 9, the first portion 81 is bent at four places. Specifically, the first portion 81 is
From the base end to the distal end, first, it bends toward the second portion 82 (lower side in FIG. 9) (this portion is referred to as a “wall portion 816”), and then the opposite side from the second portion 82 (Upper side in FIG. 9) (this portion is referred to as “wall portion 817”).
, And also bent to the second portion 82 side.

The slits 841 and 841 through which the inner needle 5 is inserted are provided at the center of the walls 816 and 817, respectively.
2 are formed. Slit 841 and slit 842
Are in communication with each other.

The dimensions of each of the slits 841 and 842 are
The inner needle 5 and its flat portion 52 are respectively insertable, and the needle tip 51 of the inner needle 5 moves in the y-axis direction with respect to the first portion 81, and the inner needle 5 moves to the wall portions 816, 817. When contact is made, the needle tip 51 is set so as not to protrude laterally (in the y-axis direction) from the distal end wall 811.

In the indwelling needle assembly 1, similarly to the indwelling needle assembly 1 of the third embodiment described above, the inner needle 5 is placed in the second position in which the needle tip 51 of the inner needle 5 is stored in the protector 8. Even when the needle 5 moves toward the distal end with respect to the protector 8, the needle tip 51 contacts the corner 814 of the distal end wall 811, and the movement is prevented. That is, the protrusion of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

In the indwelling needle assembly 1, the inner needle 5
Are inserted into the slits 841 and 842,
When the needle tip 51 of the inner needle 5 moves in the y-axis direction with respect to the first portion 81, the inner needle 5 abuts on an edge facing the slit 841 of the wall 816 or an edge facing the slit 842 of the wall 817. And the first portion 81 (the tip wall 811)
Following the movement of the inner needle 5 (needle tip 51), the tip wall 811 covers the tip side of the needle tip 51. This prevents (blocks) the needle tip 51 from protruding sideways from near the tip of the protector 8.

Accordingly, the wall portions 816 and 817 constitute a stylus tip preventing means.

According to the indwelling needle assembly 1, the same effects as those of the indwelling needle assembly 1 of the third embodiment can be obtained.

<Seventh Embodiment> Next, a seventh embodiment of the indwelling needle assembly of the present invention will be described.

FIG. 10 is a perspective view showing the structure of the protector (second posture of the protector) provided in the indwelling needle assembly of the seventh embodiment.

Hereinafter, the indwelling needle assembly 1 of the seventh embodiment will be described focusing on the differences from the above-described sixth embodiment, and the description of the same items will be omitted. In the following description, the right side in FIG. 10 is referred to as a “proximal end”, and the left side is referred to as a “distal end”.

For convenience of explanation, in FIG. 10, the longitudinal direction of the inner needle (needle body) 5 is set to the z-axis direction, and the opening and closing direction of the protector 8 is set to the x-axis direction, similarly to the above-described sixth embodiment. , An x-axis, a y-axis, and a z-axis orthogonal to each other are assumed.

The indwelling needle assembly 1 of the seventh embodiment is the same as the above-described sixth embodiment except that the structure of the protector 8 is different.

That is, the indwelling needle assembly 1 of the seventh embodiment
Then, as shown in FIG.
A hole 843 through which the inner needle 5 is inserted is formed at the center of the hole.

The diameter of the hole 843 is, for example, slightly larger than the outer diameter (diameter) of the inner needle 5 and the flat portion 52 of the inner needle 5.
Is set to the extent that it cannot pass through. Note that the flat portion 52 of the inner needle 5 is located on the distal end side from the hole 843.

In the indwelling needle assembly 1, similarly to the indwelling needle assembly 1 of the above-described sixth embodiment, the inner needle 5 is placed in the second position in which the needle tip 51 of the inner needle 5 is stored in the protector 8. Even when the needle 5 moves toward the distal end with respect to the protector 8, the needle tip 51 contacts the corner 814 of the distal end wall 811, and the movement is prevented. That is, the protrusion of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

Further, since the inner needle 5 is inserted through the hole 843, the needle tip 51 of the inner needle 5 is
When moved in the axial direction, the first portion 81 (the tip wall 811)
Following the movement of the inner needle 5 (needle tip 51), the tip wall 811 covers the tip side of the needle tip 51. This prevents (blocks) the needle tip 51 from protruding sideways from near the tip of the protector 8. Therefore, the wall 81
6 constitutes a needle tip protrusion prevention means.

Further, since the flat portion 52 of the inner needle 5 is caught by the hole 843, the inner needle 5 cannot move to the proximal end side with respect to the protector 8. That is, the inner needle 5
The protector 8 is prevented from coming off from the device.

According to the indwelling needle assembly 1, the same effect as that of the indwelling needle assembly 1 of the sixth embodiment can be obtained.

In the present invention, for example, the protector 8
In each of the wall portions 816 and 817, a hole through which the inner needle 5 is inserted may be formed, or a slit through which the inner needle 5 is inserted may be formed in the wall portion 816, and the inner needle may be formed in the wall portion 817. 5
May be formed.

<Eighth Embodiment> Next, an indwelling needle assembly according to an eighth embodiment of the present invention will be described.

FIG. 11 is a perspective view showing the structure of a protector included in the indwelling needle assembly according to the eighth embodiment, and FIG.
It is a top view showing composition (the 2nd posture of a protector) of a protector with which an indwelling needle assembly of an embodiment is provided.

Hereinafter, the indwelling needle assembly 1 of the eighth embodiment will be described focusing on the differences from the above-described seventh embodiment, and the description of the same items will be omitted. In the following description, the right side in FIGS. 11 and 12 is referred to as a “proximal end” and the left side is referred to as a “distal end”.

For convenience of explanation, FIGS. 11 and 12
In the same manner as in the above-described seventh embodiment, the x-axis, the y-axis, and the z-axis are orthogonal to each other, with the longitudinal direction of the inner needle (needle body) 5 being the z-axis direction and the opening / closing direction of the protector 8 being the x-axis direction.
Assume an axis.

The indwelling needle assembly 1 of the eighth embodiment is the same as the above-described seventh embodiment except that the structure of the protector 8 is different.

That is, the indwelling needle assembly 1 of the eighth embodiment
Then, as shown in FIG. 11 and FIG.
The first part 81 and the second part 82 are substantially U-shaped, and they intersect.

Further, walls 816 and 8 of protector 8 are provided.
Holes 843 and 844 through which the inner needle 5 is inserted are formed in the center of the y-axis direction of the holes 17.

The diameter of the hole 843 is set to be slightly larger than the outer diameter (diameter) of the inner needle 5, for example.
Is set slightly smaller than the outer diameter (diameter) of the inner needle 5 and is set to such an extent that the flat portion 52 of the inner needle 5 cannot pass through. The flat portion 52 of the inner needle 5 is
4 is located on the tip side.

In the indwelling needle assembly 1, similarly to the indwelling needle assembly 1 of the seventh embodiment described above, the inner needle 5 is placed in the second position in which the needle tip 51 of the inner needle 5 is stored in the protector 8. Even if the needle 5 moves toward the distal end with respect to the protector 8, the needle tip 51 comes into contact with the distal end wall 811 or 821, and the movement is prevented. That is, the protrusion of the needle tip 51 from the tip of the protector 8 is prevented (blocked).

Since the inner needle 5 is inserted through the holes 843 and 844, the needle tip 51 of the inner needle 5 is
When the first portion 81 (tip wall 811) moves in the y-axis direction with respect to 1, the inner needle 5 (needle tip 51) moves with the tip wall 811 covering the tip side of the needle tip 51. Follow. This prevents (blocks) the needle tip 51 from protruding sideways from near the tip of the protector 8.

Therefore, the wall portions 816 and 817 constitute a stylus tip preventing means.

[0166] Further, since the flat portion 52 of the inner needle 5 is caught by the hole 844, the inner needle 5 cannot move to the proximal end side with respect to the protector 8. That is, the inner needle 5
The protector 8 is prevented from coming off from the device.

According to the indwelling needle assembly 1, the same effects as those of the indwelling needle assembly 1 of the seventh embodiment can be obtained.

Although the protector, puncture device and indwelling needle assembly of the present invention have been described based on the illustrated embodiments, the present invention is not limited to these embodiments. It can be replaced with any configuration that can exhibit the function.

The protector, puncture device and indwelling needle assembly of the present invention may be a combination of any two or more of the first to eighth embodiments.
Further, the puncture device of the present invention may be, for example, a puncture needle such as an injection needle.

[0170]

As described above, according to the present invention, the needle point once stored in the protector is reliably prevented from protruding again from the distal end of the protector and the vicinity thereof, so that the safety during disposal can be improved. Is high.

In the case where the detachment preventing means is provided, it is possible to prevent the protector once containing the needle tip from coming off (separating) from the needle tip. Therefore, the safety is higher in the disposal processing and the like.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment (a first posture of a protector) when a puncture device of the present invention is applied to an indwelling needle assembly.

FIG. 2 is a longitudinal sectional view showing a first embodiment (a second posture of the protector) when the puncture device of the present invention is applied to an indwelling needle assembly.

FIG. 3 is a perspective view illustrating a configuration (a first posture of the protector) of a protector included in the indwelling needle assembly according to the first embodiment.

FIG. 4 is a perspective view illustrating a configuration (a second posture of the protector) of the protector included in the indwelling needle assembly according to the first embodiment.

FIG. 5 is a perspective view illustrating a configuration (a second posture of the protector) of a protector included in an indwelling needle assembly according to a second embodiment.

FIG. 6 is a perspective view illustrating a configuration (a second posture of the protector) of a protector included in an indwelling needle assembly according to a third embodiment.

FIG. 7 is a perspective view illustrating a configuration (a second posture of the protector) of a protector included in an indwelling needle assembly according to a fourth embodiment.

FIG. 8 is a perspective view illustrating a configuration (a second posture of the protector) of a protector included in an indwelling needle assembly according to a fifth embodiment.

FIG. 9 is a perspective view illustrating a configuration (a second posture of the protector) of a protector included in an indwelling needle assembly according to a sixth embodiment.

FIG. 10 is a perspective view illustrating a configuration (a second posture of the protector) of a protector included in an indwelling needle assembly according to a seventh embodiment.

FIG. 11 is a perspective view illustrating a configuration of a protector included in an indwelling needle assembly according to an eighth embodiment.

FIG. 12 is a plan view illustrating a configuration (a second posture of the protector) of a protector included in an indwelling needle assembly according to an eighth embodiment.

FIG. 13 is a perspective view showing a configuration of a conventional indwelling needle protector.

FIG. 14 is a perspective view showing a configuration of a conventional indwelling needle protector.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 indwelling needle assembly 2 outer needle 21 tip opening 3 outer needle hub 4 outer needle with hub 5 inner needle 51 needle tip 52 flat part 6 inner needle hub 61 flange 62 ventilation filter 63 fitting part 64 tip part 7 inner needle with hub 8 Protector 81 First part 811 Tip wall 812, 813 Side wall 814 Corner 815 Projection 816, 817 Wall 82 Second part 821 Tip wall 822 Projection 83 Connection part 831 Hole 841, 842 Slit 843, 844 Hole Part 100 indwelling needle 110 inner needle 111 needle tip 120 protector 130 body surface

Claims (10)

[Claims] 1. A puncture device comprising: a needle body having a sharp needle tip at a distal end; and a protector which is installed so as to be movable relative to the needle body and is capable of storing the needle tip of the needle body. The protector has a first position enabling the needle to move relative to the protector, and a second position accommodating the needle point of the needle body and preventing passage of the needle point of the needle body. A puncture device which is displaceable, and has a needle tip protrusion prevention means for preventing a needle tip of the needle body from projecting to a side of the protector when the protector is in the second posture. 2. The method according to claim 1, wherein the protector includes a first part and a second part.
And a connecting portion that connects the first portion and the second portion, and is configured such that a tip side can be opened and closed by displacement of the second portion with respect to the first portion, In the first posture, the distal end side opens, and the second
2. The puncture device according to claim 1, wherein in the posture, the distal end side is closed. 3. The device according to claim 2, wherein the needle tip protrusion preventing means is configured such that, in the second posture, the second portion is arranged with respect to the first portion.
The puncture device according to claim 2, wherein the puncture device is configured to be prevented from shifting in a direction substantially perpendicular to the opening and closing direction of the protector and substantially perpendicular to a longitudinal direction of the needle body. 4. The needle tip protrusion preventing means, wherein in the second posture, the second portion is arranged with respect to the first portion,
One of the first portion and the second portion when substantially perpendicular to the opening and closing direction of the protector and is about to shift in a direction substantially perpendicular to the longitudinal direction of the needle body. 3. The puncture device according to claim 2, wherein the puncture device has a contact portion provided so as to contact the other. 5. The needle tip protrusion preventing means, in the second posture, is substantially perpendicular to an opening and closing direction of the protector and substantially perpendicular to a longitudinal direction of the needle body. The puncture device according to claim 2, further comprising a contact portion that contacts the needle tip when the needle tip of the needle body moves. 6. The needle tip projection preventing means, in the second posture, is substantially perpendicular to an opening / closing direction of the protector and substantially perpendicular to a longitudinal direction of the needle body. The puncture device according to claim 2, wherein when the needle tip of the needle body moves, at least one of the first part and the second part follows the movement of the needle tip. 7. The puncture device according to claim 1, wherein the protector is displaced to the first posture by elastically deforming, and is displaced to the second posture by its restoring force. 8. The puncture device according to claim 1, further comprising detachment preventing means for preventing detachment of the protector from the needle body. 9. An indwelling needle assembly having the puncture device according to claim 1, wherein the needle body is a tubular inner needle having an inner needle hub on a proximal end side. An indwelling needle assembly, comprising: a hollow outer needle into which an inner needle can be inserted; and an outer needle hub installed at a base end of the outer needle. 10. The indwelling needle assembly according to claim 9, wherein the protector is located inside the outer needle hub when the indwelling needle assembly is in an assembled state.