JP2001070449A - Piercing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piercing tool of simple constitution capable of housing a used piercing needle inside a case by a simple operation and highly safe when executing an abandoning processing or the like. SOLUTION: This piercing tool 1A is provided with the piercing needle 2 provided with a needle tube 3 having a sharp needle tip 31 on its tip and a hub 4 fixed to the base end side, a bottomed cylindrical case 5 for housing the piercing needle 2 so as to freely project and retract the needle tip 31 and a lever 8 supported displaceably to the first and second side holes 6 and 7 of the case 5. The tapered part 41 of the hub 4 is fitted to a similarly tapered holding part 53 and the piercing needle 2 is fixed to the case 5. In the state, when the needle tip 31 is directed vertically upwards and the lever 8 is turned, a slope 42 formed at the tip of the hub 4 is pressurized, the hub 4 is moved in a base end direction and fixation to the case 5 is released. Thus, the piercing needle 2 is dropped by the gravity and housed inside the case 5.

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 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
Although it is provided for disposal, blood adheres and remains on the surface and inside of the inner needle, and if it is discarded as it is, it may cause blood contamination and infection, and the worker who disposes it There is a possibility that an accident of pointing a finger or the like with the needle point may occur.

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.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a puncture device which has a simple structure, allows a used puncture needle to be stored in a case by a simple operation, and has a high safety in disposal and the like. Is to provide.

[0009]

This and other objects are achieved by the present invention which is defined below as (1) to (11).

(1) A puncture needle provided with a needle tube having a sharp needle tip at the distal end and a hub fixed to the base end thereof, and a bottomed tube for accommodating the puncture needle so that the needle tip can protrude and retract. A case having a holding portion for fixedly holding the hub with the needle tip protruding out of the case; a case supported displaceably with respect to the case; An operating member having a function of releasing fixation, wherein the operating member is provided in a state where the needle tube or the hub is inserted when the hub is held by the holding portion; When the operating member is operated to release the fixation of the hub to the case with the needle tip protruding out of the case and directed vertically upward, the puncture needle falls by its own weight and falls into the case. To be stored A unique puncture device.

(2) The puncture device according to (1), wherein the holding portion has a structure for holding the hub.

(3) The puncture device according to (2), wherein the structure for holding the hub is a taper fitting structure.

(4) Any one of the above (1) to (3), wherein the tip of the hub is pressed by the operating member from the axial direction of the needle tube to release the holding of the hub by the holding portion. The puncture device according to 1.

(5) The hub has a projection or an inclined surface inclined with respect to a plane whose normal line is the axis of the needle tube.
Any of the above (1) to (4), wherein the holding of the hub by the holding portion is released by the tip of the protruding portion or the inclined surface being pressed by the operating member from the direction of the axis of the needle tube. The puncture device described.

(6) Any of the above (1) to (3), wherein the hub is pressed by the operating member from a direction perpendicular to the axis of the needle tube to release the holding of the hub by the holding portion. The puncture device described in Crab.

(7) The hub has a projecting portion or an inclined surface inclined with respect to a plane whose normal line is the axis of the needle tube,
(1) to (3), and (6) in which the holding of the hub of the holding portion is released by the operation member being pressed by the projecting portion or the inclined surface from a direction orthogonal to the axis of the needle tube. ).

(8) The operating member has a function of preventing the needle tip of the puncture needle housed in the case from protruding from the case.
The puncture device according to any one of the above.

(9) The puncture device according to (8), wherein the function of preventing the needle tip from projecting is exerted when the fixing of the hub to the case is released or immediately thereafter.

(10) The puncture device according to any one of the above (1) to (9), further comprising a cushioning member for reducing an impact when the puncture needle falls.

(11) The puncture device according to (10), wherein the buffer member has a liquid absorbing ability.

[0021]

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 and 2 are longitudinal sectional views respectively showing a first embodiment of the puncture device of the present invention, and FIGS. 3, 4 and 5 are diagrams of the puncture device shown in FIGS. 1 and 2, respectively. It is an expanded sectional view of an important section. In the following description, the lower side in FIGS. 1 to 5 is referred to as a “proximal end” and the upper side is referred to as a “distal end”.

The puncture device 1A shown in FIGS. 1 and 2 constitutes an inner needle of an indwelling needle assembly having an outer needle and an inner needle (particularly, an indwelling needle assembly for infusion). , Puncture needle 2
, A bottomed cylindrical case 5 for accommodating the puncture needle 2, and a lever (operating member) 8 supported displaceably with respect to the case 5.

The puncture needle 2 comprises a hollow needle tube (inner needle) 3 and a hub 4 fixed to the proximal end of the needle tube 3.

The needle tube 3 is made of, for example, a metal material such as stainless steel, aluminum or an aluminum alloy, titanium or a titanium alloy, and has a sharp needle tip (cutting edge) 31 formed at the tip thereof. The shape of the needle tip 31 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 needle tube 3.

A hub 4 is fixed to the proximal end of the needle tube 3 in a liquid-tight manner, for example, by fitting, caulking, fusing, bonding with an adhesive, or the like. The internal space of the hub 4 communicates with the lumen of the needle tube 3. The hub 4 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured. Thereby, it is possible to visually check the flashback of blood when the needle tip 31 secures a blood vessel.

The distal end of the hub 4 has a constant outer diameter.
The base end side of the hub 4 has a tapered shape whose outer diameter gradually increases in the base end direction. The tapered portion 41 has the largest outer diameter at the base end, but the maximum outer diameter of the tapered portion 41 (= the maximum outer diameter of the hub 4) is smaller than the inner diameter of the case 5 described later. In the present embodiment, the maximum outer diameter of the tapered portion 41 is a value slightly smaller than the inner diameter of the case 5. Thereby, the movement of the hub 4 in the case 5 can be performed smoothly, and the puncture needle 2 can be dropped without any trouble.

The distal end surface of the hub 4 forms an inclined surface 42 inclined at a predetermined angle (for example, about 5 to 45 °) with respect to a plane (cross section of the needle tube 3) whose normal line is the axis of the needle tube 3. I have. The inclined surface 42 is pressed by a lever 8 described later, and the fixing of the hub 4 to the case 5, that is, the fixing of the puncture needle 2 is released.

Although not shown, a ventilation filter having a property of transmitting gas but blocking liquid may be provided near the base end opening of the hub 4. By installing this ventilation filter, it is possible to prevent blood from flowing out from the base end opening of the hub 4. Examples of the constituent material of the ventilation filter include various sintered porous bodies, hydrophobic nonwoven fabrics, and other porous bodies. In this case, as the sintered porous body, for example, a polymer material (powder) such as polyethylene,
A material obtained by sintering a material containing a hydrophilic (water-soluble, water-swellable) polymer is preferable.

The case 5 is formed of a bottomed cylindrical (in the present embodiment, cylindrical) member for accommodating the puncture needle 2 so that the needle tip 31 thereof can protrude and retract. The case 5 has a puncture needle storage space 57 longer than the entire length of the puncture needle 2 inside.

The base end (bottom) of the case 5 is sealed by a bottom plate 51. In the vicinity of the bottom plate 51, a cushioning member 59 for reducing the impact when the puncture needle 2 falls is installed. This buffer member 59 is extendable and contractible.

The constituent material of the cushioning member 59 includes, for example, various rubber materials, various thermoplastic resins, elastic materials such as polyurethane, woven fabric, nonwoven fabric, paper material, etc., for example, porous polyurethane, sponge, A material having a liquid absorbing ability (a porous material, particularly a hydrophilic porous material) such as a woven fabric, a nonwoven fabric, a paper material having a hydrophilic property, or a laminate thereof is preferable. Accordingly, even when a liquid such as blood flows out from the base end opening of the hub 4, the buffer member 59 absorbs and holds the liquid, so that leakage to the outside of the case 5 can be more reliably prevented.

The cushioning member 59 is preferably 0.1
Those that can absorb and hold about 1.0 ml of liquid are preferred.

At the tip of the case 5, there is formed a hub mounting portion 52 for reducing the outer diameter and the inner diameter thereof and for mounting an outer needle hub 11 of the outer needle 10 described later. This hub mounting part 5
Numeral 2 has a shape (tapered shape) whose outer diameter gradually decreases toward the distal end so that the outer needle hub 11 can be easily and reliably mounted by fitting.

A first side hole 6 and a second side hole 7 are formed at a position adjacent to the base end side of the hub mounting portion 52 of the case 5. The first side hole 6 and the second side hole 7 are respectively formed on opposite side walls of the case via the axis of the case 5 so as to penetrate these side walls.

The shapes of the first side hole 6 and the second side hole 7 are both quadrangular (rectangular).
Is smaller in size than the second side hole 7. That is, the first side hole 6 has a thin plate portion 81 of the lever 8 described later.
Is inserted into the second side hole 7, and the thick plate portion 82 of the lever 8 is inserted into the second side hole 7.
Is inserted.

Further, the inner surface 61 on the base end side of the first side hole 6,
The base side inner surface 71 of the second side hole 7 is located at the same level (level 54) in the vertical direction (the axial direction of the case 5) in FIG.

Further, at a position proximal to the first side hole 6 and the second side hole 7 of the case 5, a distal end portion including the needle tip 31 of the needle tube 3 projects outside the case 5. A holding portion 53 for holding the hub 4 in a fixed manner, particularly for holding the hub 4 is provided. The holding portion 53 is provided at a position opposite to the bottom plate 51 of the case 5.

The holding portion 53 is formed by the tapered portion 41 of the hub 4.
The inner peripheral surface has a shape corresponding to the outer peripheral surface of the tapered portion 41, that is, a tapered shape in which the inner diameter gradually increases in the proximal direction.

When the tapered portion 41 of the hub 4 is fitted (sandwiched) to the holding portion 53, the puncture needle 2 is moved such that the distal end portion including the needle tip 31 of the needle tube 3 is outside the case 5 of a predetermined length. It is fixed to the case 5 in a protruding state (see FIG. 1).

The holding portion 53 is provided with the tapered portion 41 of the hub 4.
Are fitted and fixed, the distal end of the hub 4 protrudes distally (upward in FIG. 3) from the level 54 (see FIG. 3). More specifically, the inclined surface 42 of the hub 4
Is located on the front end side of the level 54 almost entirely.

When the tapered portion 41 of the hub 4 is fitted to the holding portion 53 in this manner, the hub 4 cannot move further to the distal end side with respect to the case 5. That is, the case 5 of the puncture device 1A has a function of preventing the hub 4 from moving beyond the operation member 8 toward the distal end of the case 5. Thus, the puncture needle 2 is prevented from jumping out of the case 5 and being separated from the case 5, and the projection length of the needle tube 3 from the distal end opening 521 is set to a predetermined length regardless of the state (posture) of the lever 8. Can be restricted to length.

The shape of the hub 4 and the holding portion 53 is not limited to the one shown in the figure. For example, the hub 4 and the holding portion 53 may have a structure in which the hub 4 and the holding portion 53 are fitted to each other.
A structure combining such concave-convex fitting and tapered fitting as shown may be used.

The case 5 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin in order to obtain internal visibility. Note that, in the present embodiment, the case 5 is entirely formed integrally with a resin, but is not limited thereto.
May be composed of a plurality of members.

A lever (operating member) 8 is supported on the case 5 so as to be displaceable. The lever 8 includes a thin plate portion 81 and a thick plate portion 82, and when the puncture needle 2 is fixed to the case 5 (the state shown in FIGS. 1 and 3), the thin plate portion 8 is provided.
1 is inserted into the first side hole 6 and the second side hole 7.

At this time, the surface on the base end side of the thin plate portion 81 of the lever 8 is in contact with the inclined surface 42 of the hub 4 and therefore,
The lever 8 is moved so that the thick plate portion 82 faces obliquely upward.
It is inclined with respect to the level 54 at substantially the same angle as the inclined surface 42 (see FIG. 3). Further, the lever 8 is tilted by this inclination.
Step 84 located at the boundary between thin plate 81 and thick plate 82
Are engaged near the base end side (shoulder) of the second side hole 7 of the case, and maintain its posture.

From the state shown in FIG. 1 and FIG.
By pressing the base 2 toward the base end, the lever 8 rotates around the left end of the thin plate portion 81 in the drawing until it becomes substantially horizontal in the drawing (see FIGS. 2 and 4). This allows
The hub 4 is pressed toward the base end in the axial direction of the needle tube 3, the tapered fitting in the holding portion 53 is released, and the fixation of the puncture needle 2 to the case 5 is released.

Further, from the state shown in FIGS. 2 and 4 (after the puncture needle 2 has fallen), the lever 8
By pressing in the direction (left direction in the figure), it moves (slids) in the same direction (see FIG. 5). Thereby, the lever 8
Has a function of preventing the needle tip 31 of the puncture needle 2 stored in the case 5 from protruding from the case 5.

The thin plate portion 81 of the lever 8 is formed with a hole 83 penetrating the thin plate portion 81, and the needle tube 3 is inserted into the hole 83 when the puncture needle 2 is fixed to the case 5.

In the present embodiment, the hole 83 has a circular shape. However, the shape of the hole 83 is not limited to this.
It may be a polygon such as an ellipse, a triangle, a quadrangle, or a hexagon. Further, the inner diameter of the hole 83 may be constant or may vary along the thickness direction of the thin plate portion 81. Further, in the present embodiment, the axis of the hole 83 is parallel to the thickness direction of the thin plate portion 81, but the axis of the hole 83 may be inclined at a predetermined angle with respect to the thickness direction of the thin plate portion 81. . Instead of the hole 83, a groove, a slit, or the like having a similar function may be used.

The inner diameter of the hole 83 is set larger than the outer diameter of the needle tube 3 so that the needle tube 3 can pass through the lever 8 in the inclined state. That is, the shape and the size of the hole 83 are such that the rotation of the lever 8 is not hindered (rotation is possible). The inner diameter of the hole 83 is
Is set smaller than the outer diameter of the distal end portion of the hub 4 so as not to pass through.

On the surface on the tip end side of the thick plate portion 82 of the lever 8,
A recess 85 is formed. On the other hand, on the inner surface at the distal end of the second side hole 7 of the case 5 (the surface opposite to the inner surface 71 at the proximal end), a convex portion 55 that can be fitted into the concave portion 85 is formed.

As shown in FIG. 5, the thick plate portion 82 is inserted into the case 5 through the second side hole 7, and the step portion 84 is formed on the inner wall surface of the case 5 adjacent to the front end of the first side hole 6. 5, the concave portion 85 and the convex portion 55 are fitted, and the movement of the lever 8 to the right in FIG. 5 is restricted. The concave portion 85 and the convex portion 55 constitute a means for maintaining the function of preventing the needle tip 31 from protruding outside the case 5. 1 and 2, the illustration of the concave portion 85 and the convex portion 55 is omitted.

In a state where the puncture needle 2 is fixed to the case 5 (the state shown in FIGS. 1 and 3), the outer needle 10 is mounted on the needle tube 3 protruding from the distal end opening 521 of the hub mounting portion 52 (see FIG. 1). (See FIG. 1).

The outer needle 10 has an outer needle hub 11 fixed to the proximal end thereof. The outer needle 10 is attached by inserting the needle tube 3 into the lumen of the outer needle 10 and connecting the outer needle hub 11 to the hub. This is performed by fitting to the mounting portion 52. When the outer needle 10 is mounted in this manner, the needle tip 31 of the needle tube 3 projects from the distal end opening of the outer needle 10.

The constituent materials of the hub 4, the case 5, and the lever 8 are not particularly limited, and may be, for example, polyolefins such as polyethylene, polypropylene, polybutadiene, ethylene-vinyl acetate copolymer, polyvinyl chloride, and the like.
Polyester such as polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polybutylene terephthalate, acrylic resin, ABS resin, AS resin, ionomer, polyacetal, polyphenylene sulfide, polyether ether ketone A resin material may be used.

Examples of preferable constituent materials of the outer needle 10 include various soft resins such as ethylene-tetrafluoroethylene copolymer (ETFE), polyurethane, and polyether nylon resin.

Next, an example of a method of using the puncture device 1A will be described. [1] As shown in FIGS. 1 and 3, with the puncture needle 2 fixed to the distal end side of the case 5, the outer needle 10 is mounted on the needle tube 3, and these are assembled (hereinafter, this state will be referred to as “this state”). "Assemble state"). In this step, the puncture device 1
When A is used (when the packaging material for wrapping the puncture device 1A is opened), it is preferably completed already.

[2] The case 5 of the assembled puncture device 1A is gripped by hand, and the needle tube 3 and the outer needle 10 are punctured into a blood vessel (vein or artery) of the patient.

When the needle tip 31 of the needle tube 3 is punctured into a blood vessel,
The blood flows backward in the needle tube 3 in the proximal direction due to the internal pressure (blood pressure) of the blood vessel, is introduced into the hub 4, and the flashback can be visually recognized through the hub 4 and the case 5 having visibility. This makes it possible to know that the needle tip 31 of the needle tube 3 has secured a blood vessel.

[3] When the needle tube 3 and the outer needle 10 are further advanced in the distal direction by a small distance, the distal end of the outer needle 10 is inserted into the blood vessel. Thereby, the outer needle 10 secures a blood vessel.

At this time, blood flows into the lumen of the outer needle 10, but in the assembled puncture device 1A, the distal end opening 521 is formed.
Is in contact with the outer peripheral surface of the needle tube 3 and the distal end opening 521 is substantially sealed, so that the blood passes through the lumen of the outer needle 10 in the proximal direction (backflow) and the blood flows therethrough. Flow into the case 5 through the distal end opening 521 is suppressed (delayed) or prevented.

[4] While holding the outer needle 10 placed in the blood vessel with one hand, grasp the case 5 with the other hand and pull the puncture device 1A in the proximal direction, and remove the needle tube 3 from the outer needle 10. Remove it. Outer needle hub 1 of outer needle 10 from which needle tube 3 has been removed
At 1, the connector of the infusion set is quickly connected, and the administration of the infusion is started according to a standard method.

[5] On the other hand, after the needle tube 3 is extracted from the outer needle 10, the puncture device 1A becomes unnecessary, and is discarded as follows.

As shown in FIGS. 1 and 3, puncture device 1A
In this state, the thick plate portion 82 of the lever 8 is pressed by a finger in the proximal direction (the direction of the arrow in FIG. 3). Thereby, the left end of the thin plate portion 81 of the lever 8 in FIG. 3 and rotate clockwise until it becomes substantially horizontal, and the state shown in FIGS. 2 and 4 is obtained. The needle tube 3 is inserted into the hole 83 formed in the lever 8. However, since the hole 83 is shaped so as not to hinder the rotation of the lever 8, the rotation of the lever 8 is not hindered. Done.

By the rotation of the lever 8, the inclined surface 42 of the hub 4 is pressed in the proximal direction, and the hub 4 moves in the proximal direction with respect to the case 5. Thereby, the tapered portion 4 of the hub 4
The puncture needle 2 is released from the fixed state by the fitting of the holder 1 and the holding portion 53 and falls in the proximal direction by its own weight, and is stored in the puncture needle storage space 57 of the case 5 (see FIG. 2). When the puncture needle 2 falls, the needle tube 3 comes out of the hole 83 of the lever 8.

When the puncture needle 2 falls, the shock-absorbing member 59 installed at the bottom (base end) of the case 5 reduces the impact of the fall. When a porous (having a liquid absorbing ability) cushioning member 59 is used, after the hub 4 collides with the cushioning member 59, the blood adhering to and remaining on the hub 4 is absorbed by the cushioning member 59 and retained. Therefore, leakage of blood and the like can be more reliably prevented thereafter.

The puncture needle 2 dropped into the case 5 and stored
The tip of the needle tip 31 is located closer to the base end than the level 54. In the present embodiment, the needle tip 31 is located near the holding section 53.

As described above, in the puncture device 1A, after the rotation operation of the lever 8, the puncture needle 2 is automatically stored in the case 5 by dropping. Therefore, contamination and infection by blood attached to the puncture needle 2 can be effectively prevented.

Next, from the state shown in FIG. 2, the thick plate portion 82 of the lever 8 is pressed (pushed) in the arrow X direction in FIG. 4, and the lever 8 is moved (slid) in the same direction (see FIG. 5). ). As a result, the thick plate portion 82 of the lever 8 is inserted into the case 5 from the second side hole 7, and the step 84 abuts on the inner wall surface of the case 5 adjacent to the distal end of the first side hole 6. Stop by the way. At this time, the concave portion 85 formed on the lever 8 side is used.
And the convex portion 55 formed on the case 5 side are fitted.

In this state, even when the puncture device 1A is turned upside down, the puncture needle 2 stored in the case 5 can be used.
Of the needle tip 31 is prevented from moving toward the distal end by the thick plate portion 82 of the lever 8, that is, the distal end opening 5 of the case 5.
Projection from 21 is prevented. Further, the recess 85
5, the lever 8 in the state shown in FIG. 5 unintentionally returns in the direction opposite to the arrow X, so that the needle tip 31 can protrude from the distal end opening 521 of the case 5. Is prevented. Therefore, the puncture device 1
When discarding A, high security is ensured.

The pressing movement of the lever 8 in the direction of the arrow X is performed immediately after the turning operation of the lever 8 in the proximal direction, that is, when the fixing of the hub 4 to the case 5 is released or immediately thereafter ( (Continuously as a series of operations). Therefore, the accommodation of the puncture needle 2 in the case 5 can be completed in a short time by an extremely simple operation.

Further, the case 5 can be gripped with one hand, and the finger 8 (thumb or forefinger) can be used to perform the turning operation of the lever 8 and the subsequent pushing operation. Therefore, preparation for disposal of puncture device 1B after use can be performed with one hand.

The puncture device 1A in which the puncture needle 2 is stored in the case 5 as described above and the needle point 31 is prevented from protruding outside the case 5 again is subjected to disposal.

FIGS. 6 and 7 are longitudinal sectional views showing a second embodiment of the puncture device of the present invention, and FIGS. 8, 9 and 10 are diagrams of the puncture device shown in FIGS. 6 and 7, respectively. FIG. 11 is an enlarged sectional view of a main part, FIG. 11 is a sectional view taken along line YY in FIG.
FIG. 12 is a sectional view taken along the line ZZ in FIG.

Hereinafter, the second puncture device will be described based on these drawings.
The configuration of the embodiment will be described, but the description will focus on the differences from the above-described embodiment, and description of similar items will be omitted. In the following description, the lower side in FIGS. 6 to 10 is referred to as a “proximal end” and the upper side is referred to as a “distal end”.

The puncture device 1B shown in FIGS. 6 and 7 constitutes an inner needle of an indwelling needle having an outer needle and an inner needle, as in the first embodiment. , A bottomed cylindrical case 5 for accommodating the puncture needle 2, and a lever (operation member) 9 supported displaceably with respect to the case 5.

The puncture device 1B differs from the first embodiment in the structure of the distal end portion of the case 5 and the structure of the lever 9, and is substantially the same in other respects.

That is, a first side hole 6 and a second side hole 7 each having substantially the same shape are provided at the end of the case 5.
Are formed through the side walls of the first side holes 6.
A lever (operation member) 9 is slidably inserted in the second side hole 7 in a direction perpendicular to the axis of the case 5.

A notch 90 is provided on the base end surface side of the lever 9 at a position adjacent to the base 91, whereby the hub 4
Inclined surface 9 inclined at substantially the same angle as inclined surface 42 at the tip of
2 are formed (see FIGS. 8 to 10).

When the puncture needle 2 is fixed to the case 5 by the hub 4 (the state shown in FIGS. 6 and 8), the distal end of the hub 4 protrudes from the level 54 toward the distal end, and the notch 9
Inserted in 0.

Further, the lever 9 is formed with long holes 93 which are respectively opened on the inclined surface 92 and the surface on the opposite side (the surface on the tip side). The extension direction of the long hole 93 is the same as the longitudinal direction of the lever 9, that is, the sliding direction of the lever 9. The needle tube 3 of the puncture needle 2 is
Is inserted, and the needle tube 3 can relatively move along the longitudinal direction within the elongated hole 93 (see FIGS. 8 to 12).

The hole formed in the lever 9 is
3, the lever 9 can slide in the lateral direction in FIG. 6, and the inclined surface 92 for pressing the hub 4 in the proximal direction around the proximal side of the elongated hole 93 has a sufficient area. Can be secured.

Instead of the long hole 93, for example, a groove (slit) in which the left end of the long hole 93 in FIG. 11 is opened to the left end surface of the lever 9 may be formed. Function and effect can be exhibited.

A flange-shaped stopper 94 is formed at the right end of the lever 9 in FIG. When the lever 9 is pushed leftward in FIG. 8, the stopper 94 engages around the second side hole 7 of the case 5 to prevent the lever 9 from moving further leftward (FIG. 10). reference).

A non-slip member 95 is provided on the base end side of the base 91 of the lever 9. As shown in FIG. 10, the base 91 of the lever 9 is inserted into the case 5 and the stopper 9
When the abutment 4 comes into contact with the outer wall surface of the case 5,
5 is crimped to the proximal inner surfaces 61 and 71 of the first and second side holes 6 and 7 of the case 5. Thereby, the sliding resistance (friction resistance) of the lever 9 with respect to the case 5 increases, and the movement of the lever 9 to the right in FIG. 10 is restricted (suppressed).
Is done. The non-slip member 95 is provided in the case 5 of the needle tip 31.
A means for maintaining the function of preventing outward protrusion is provided.

Examples of the constituent material of the non-slip member 95 include various rubber materials such as natural rubber, isoprene rubber, silicone rubber, urethane rubber, styrene-butadiene rubber, fluorine rubber, and acrylic rubber; Materials (or soft materials) such as various thermoplastic elastomers such as polyolefins and polyolefins.

Next, an example of a method of using the puncture device 1B will be described.

[1] As shown in FIGS. 6 and 8, with the puncture needle 2 fixed to the distal end side of the case 5, the outer needle 1
0 to the needle tube 3 and assemble them (hereinafter, referred to as
This state is called an "assembled state." It is preferable that this step has already been completed when the puncture device 1B is used (when the packaging material that wraps the puncture device 1B is opened).

[2] The case 5 of the assembled puncture device 1B is grasped by hand, and the needle tube 3 and the outer needle 10 are punctured into a blood vessel (vein or artery) of the patient.

When the needle tip 31 of the needle tube 3 is punctured into a blood vessel,
The blood flows backward in the needle tube 3 in the proximal direction due to the internal pressure (blood pressure) of the blood vessel, is introduced into the hub 4, and the flashback can be visually recognized through the hub 4 and the case 5 having visibility. This makes it possible to know that the needle tip 31 of the needle tube 3 has secured a blood vessel.

[3] When the needle tube 3 and the outer needle 10 are further advanced in the distal direction by a small distance, the distal end of the outer needle 10 is inserted into the blood vessel. Thereby, the outer needle 10 secures a blood vessel.

At this time, blood flows into the lumen of the outer needle 10, but in the assembled puncture device 1B, the distal end opening 521
Is in contact with the outer peripheral surface of the needle tube 3 and the distal end opening 521 is substantially sealed, so that the blood passes through the lumen of the outer needle 10 in the proximal direction (backflow) and the blood flows therethrough. Flow into the case 5 through the distal end opening 521 is suppressed (delayed) or prevented.

[4] While holding the outer needle 10 indwelled in the blood vessel with one hand, grasp the case 5 with the other hand and pull the puncture device 1B in the proximal direction, and remove the needle tube 3 from the outer needle 10. Remove it. Outer needle hub 1 of outer needle 10 from which needle tube 3 has been removed
At 1, the connector of the infusion set is quickly connected, and the administration of the infusion is started according to a standard method.

[5] On the other hand, after the needle tube 3 is extracted from the outer needle 10, the puncture device 1B becomes unnecessary, and is discarded as follows.

As shown in FIGS. 6 and 8, puncture device 1B
In this state, the end of the lever 9 on the stopper 94 side is pressed with a finger in the arrow X direction (direction orthogonal to the axis of the needle tube 3) in FIG. And
Move (slide) in the same direction. At this time, since the needle tube 3 is inserted into the elongated hole 93 extending in the same direction as the sliding direction of the lever 9, the sliding of the lever 9 is not hindered.

When the lever slides in the X direction, the lever 9 is moved.
The inclined surface 92 formed on the hub 4 presses the inclined surface 42 of the hub 4. A force having a vector component in the proximal direction of the pressing force acts on the inclined surface 42, and the hub 4 moves in the proximal direction with respect to the case 5. As a result, the fixing of the hub 4 by the fitting between the tapered portion 41 and the holding portion 53 is released, and the puncture needle 2 falls in the proximal direction by its own weight and is stored in the puncture needle storage space 57 of the case 5. (See FIG. 7). When the puncture needle 2 falls, the needle tube 3 comes out of the long hole 93 of the lever 9.

When the puncture needle 2 falls, the shock-absorbing member 59 provided at the bottom (base end) of the case 5 reduces the impact of the fall. When a porous (having a liquid absorbing ability) cushioning member 59 is used, after the hub 4 collides with the cushioning member 59, the blood adhering to and remaining on the hub 4 is absorbed by the cushioning member 59 and retained. Therefore, leakage of blood and the like can be more reliably prevented thereafter.

The puncture needle 2 dropped into the case 5 and stored
The tip of the needle tip 31 is located closer to the base end than the level 54. In the present embodiment, the needle tip 31 is located near the holding section 53.

As described above, in the puncture device 1B, after the puncture needle 2 slides by pressing the lever 9, the puncture needle 2 is automatically stored in the case 5 by dropping. There is no need to touch it, so that contamination and infection by blood attached to the puncture needle 2 can be effectively prevented.

Next, from the state shown in FIG. 7, the end of the lever 9 on the stopper 94 side is further pressed by a finger in the direction of arrow X in FIG. 9 to move (slide) in the same direction. As a result, the base 91 of the lever 9 is inserted into the case 5 from the second side hole 7, and stops when the stopper 94 contacts the outer wall surface around the second side hole 7 of the case 5.

In this state, even if the puncture device 1B is turned upside down, for example,
Of the needle tip 31 is prevented from moving toward the distal end by the base 91 of the lever 9, that is, the distal end opening 52 of the case 5.
1 is prevented from protruding. Further, since the non-slip member 95 is pressed against the inner surfaces 61 and 71 on the base end side of the first and second side holes 6 and 7, the sliding resistance (friction resistance) of the lever 9 with respect to the case 5 is increased. The lever 9 in the state shown in FIG. 10 unintentionally returns in the direction opposite to the arrow X, thereby preventing the needle tip 31 from being in a state where it can protrude from the distal end opening 521 of the case 5. From such a thing,
When the puncture device 1B is discarded, high safety is ensured.

In the puncture device 1B, the lever 9 is moved by the arrow X
Just push (pushing) in the direction, the case 5 of the hub 4
Case 5 due to release of fixation to
The stylus can be housed inside and the needle tip 31 can be prevented from protruding out of the case 5, and a series of these operations can be performed instantaneously. Therefore, the accommodation of the puncture needle 2 in the case 5 can be completed in a short time by an extremely simple operation.

Further, it is possible to hold the case 5 with one hand and push the lever 9 with the finger (thumb or forefinger) of the hand. Therefore, preparation for disposal of puncture device 1B after use can be performed with one hand.

The puncture device 1B in which the puncture needle 2 is stored in the case 5 as described above and the needle point 31 is prevented from protruding out of the case 5 again is subjected to disposal.

Although the puncture device according to the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to this, and each part constituting the puncture device may have any function capable of exhibiting the same function. Can be replaced with the one having the configuration described above.

For example, the operating member is not limited to a lever, and may be, for example, a rotary dial or a button. The operating member is a puncture needle storage space 57 of the case 5.
May be liquid-tightly sealed.

In the first and second embodiments, the operating member (lever 8) itself does not have a function of fixing the puncture needle 2 to the case 5, but the present invention is not limited to this. It may have a function of fixing the needle 2 (the hub 4) to the case 5.

The puncture device of the present invention is not limited to the needle tube 3 used as the inner tube of the indwelling needle assembly, but also includes, for example, a device using the needle tube 3 alone, a syringe, an injection needle, and a blood collection needle. Etc. can also be applied.

[0110]

As described above, according to the present invention, a used puncture needle can be quickly and simply stored in a case by a simple operation, and blood contamination and infection can be caused during disposal. Thus, it is possible to provide a puncture device which is extremely excellent in hygiene and safety, without accident of piercing a finger or the like with a needle tip by mistake.

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

[Brief description of the drawings]

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

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

FIG. 3 is an enlarged longitudinal sectional view showing a main part (a state in which a puncture needle is fixed to a case) of the puncture device of the first embodiment.

FIG. 4 is an enlarged longitudinal sectional view showing a main part of the puncture device according to the first embodiment (in a state where the puncture needle is not fixed to the case).

FIG. 5 is an enlarged longitudinal sectional view showing a main part of the puncture device according to the first embodiment (a state in which a puncture needle is stored in a case and a needle tip is prevented from protruding outside the case).

FIG. 6 is a longitudinal sectional view showing a second embodiment of the puncture device of the present invention.

FIG. 7 is a longitudinal sectional view showing a second embodiment of the puncture device of the present invention.

FIG. 8 is an enlarged longitudinal sectional view showing a main part (a state where a puncture needle is fixed to a case) of the puncture device according to the second embodiment.

FIG. 9 is an enlarged longitudinal sectional view showing a main part of the puncture device according to the second embodiment (in a state where the puncture needle is not fixed to the case).

FIG. 10 is an enlarged longitudinal sectional view showing a main part of the puncture device according to the second embodiment (a state in which a puncture needle is housed in a case and a needle tip is prevented from protruding outside the case).

FIG. 11 is a sectional view taken along line YY in FIG.

12 is a sectional view taken along line ZZ in FIG. 9;

[Explanation of symbols]

 1A, 1B Puncture device 2 Puncture needle 3 Needle tube 31 Needle tip 4 Hub 41 Tapered portion 42 Inclined surface 5 Case 51 Bottom plate 52 Hub mounting portion 521 Tip opening 53 Holding portion 54 Level 55 Convex portion 57 Puncture needle storage space 59 Buffer member 6 1 side hole 61 proximal end inner surface 62 distal end inner edge 7 first side hole 71 proximal end inner surface 8 lever 81 thin plate portion 82 thick plate portion 83 hole 84 step portion 85 concave portion 9 lever 90 cutout 91 base portion 92 slope Surface 93 Long hole 94 Stopper 95 Non-slip member 10 Outer needle 11 Outer needle hub

Claims (11)

[Claims] 1. A puncture needle including a needle tube having a sharp needle tip at a distal end and a hub fixed to a base end side thereof, and a bottomed cylindrical shape for accommodating the puncture needle so that the needle tip can protrude and retract. A case having a holding portion for fixedly holding the hub with the needle tip protruding out of the case; and a displaceably supported case for the case, and fixing the hub to the case. An operating member having a function of releasing the needle, wherein the operating member is provided in a state where the needle tube or the hub is inserted when the hub is held by the holding portion; When the operating member is operated to release the fixation of the hub to the case with the tip protruding outside the case and directed vertically upward, the puncture needle is dropped by its own weight and stored in the case. Specially Puncture device to be. 2. The puncture device according to claim 1, wherein the holding portion has a structure for holding the hub. 3. The puncture device according to claim 2, wherein the structure for holding the hub is a taper fitting structure. 4. The puncture according to claim 1, wherein the holding portion of the hub is released by pressing the tip of the hub against the operating member from the axial direction of the needle tube. Utensils. 5. The hub has a protruding portion or an inclined surface inclined with respect to a plane normal to the axis of the needle tube, and the tip of the protruding portion or the inclined surface is inclined from the direction of the axis of the needle tube. The puncture device according to claim 1, wherein the holding of the hub by the holding portion is released by being pressed by an operation member. 6. The holding device according to claim 1, wherein the holding of the hub by the holding portion is released by pressing the hub against the operating member from a direction perpendicular to the axis of the needle tube. Puncture tool. 7. The hub has a projection or an inclined surface inclined with respect to a plane whose normal line is the axis of the needle tube. The puncture device according to any one of claims 1 to 3, and 6, wherein the holding of the hub by the holding portion is released by being pressed by an operation member. 8. The puncture device according to claim 1, wherein the operation member has a function of preventing the needle tip of the puncture needle housed in the case from protruding from the case. . 9. The puncture device according to claim 8, wherein the function of preventing the protrusion of the needle tip is exerted when the fixing of the hub to the case is released or immediately thereafter. 10. The puncture device according to any one of claims 1 to 9, further comprising a cushioning member for reducing an impact when the puncture needle falls. 11. The puncture device according to claim 10, wherein the buffer member has a liquid absorbing ability.