JP2002224219A - Punctual implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punctual implement sealable the tip opening of a needle tube after blood collection by a simple operation without obstructing a punctual operation. SOLUTION: This punctual implement 1 indicated in Figure 2 is provided with the needle tube (needle body) 2 having a sharp needle tip 21 at a tip part, a hub 3 fixed to the base end part of the needle tube 2, a protector 4 turnably installed to the hub 3 and a sealing member 7 provided inside the protector 4. The protector 4 is connected to a fixing member 6 through a flexible belt-like connection member 5 and is turned to the first position of covering at least the needle tip 21 of the needle tube 2 and the second position of separating from the needle tube 2 by the deformation of the connection member 5. At the time of turning the protector 4 to the first position, the sealing member 7 seals the tip opening 22 of the needle tube 2. Also, the protector 4 is provided with an engaging piece 42 as a holing means for holding the first position.

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 by being attached to an arterial blood sampling device for collecting arterial blood.

[0002]

2. Description of the Related Art Arterial blood is collected to analyze and measure the partial pressure and pH of gas in blood.
The arterial blood sampling device used for this is different from the venous blood sampling device in that blood is introduced into the blood sampling device by the blood pressure in the artery.

[0003] In this case, as blood is introduced into the syringe of the blood collection device by blood pressure, it is necessary to discharge air inside the syringe to the outside, so that the inside and outside of the syringe can be ventilated through a filter member. Has become.

[0004] When collecting arterial blood using such an arterial blood sampling device, an injection needle is attached to the distal end of the device. This injection needle includes a needle tube having a sharp needle tip at a distal end, and a hub fixed to a proximal end of the needle tube.

When oxygen and carbon dioxide in the atmosphere are mixed into the collected blood, it is impossible to accurately analyze and measure the gas partial pressure, pH, and the like in the blood. For this reason,
After collecting the blood, the tubular cap containing the sealing member is quickly covered over the needle tube, and the tip of the needle is pierced into the sealing member to seal the opening at the distal end of the needle tube to prevent contact between the blood and the atmosphere. Prevention has been made.

[0006] However, since the operation of placing the cap on the needle tube is performed by inserting the needle tube into the opening at one end of the cap from the tip thereof,
Great care must be taken to prevent the blood adhering to and remaining on the needle tip from reaching the operator's hand or stabbing the operator's hand with the needle tip. There is a problem that it takes time and effort.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple structure, a needle tube after blood collection can be housed in a protector by a simple operation, and a distal end opening of the needle tube is sealed. It is to provide a puncture tool that can be used.

[0008]

This and other objects are achieved by the present invention which is defined below as (1) to (8).

(1) A puncture device which is used by being attached to a distal end portion of an arterial blood sampling device, the needle tube having a needle tip at a distal end, a hub installed at a proximal end of the needle tube, and at least the needle tube. A protector displaceable between a first position covering the needle tip and a second position separated from the needle tube, wherein when the protector is at the first position, a distal end opening of the needle tube is sealed; A puncture device, wherein the protector is provided with a sealing member capable of performing the sealing.

(2) The protector includes a protector main body, and a storage portion provided at a distal end portion of the protector main body and storing the sealing member, wherein the storage portion extends along a longitudinal direction of the protector main body. The protector is placed relatively movably, the protector is in the first position, and the housing is moved in the proximal direction of the protector main body, whereby the sealing member seals the distal end opening of the needle tube in an airtight manner. The puncture device according to the above (1), which is configured to seal the puncture device.

(3) The above-mentioned (2), further comprising detachment preventing means for preventing detachment of the storage portion from the protector body.
The puncture device according to 1.

(4) The sealing member is made of an elastic material, and accommodates the needle tip of the needle tube therein to hermetically seal the opening at the distal end of the needle tube.
The puncture device according to any one of (3) to (3).

(5) The puncture device according to (4), wherein the sealing member has a slit through which the needle tip of the needle tube can be inserted.

(6) The protector has a groove formed along the longitudinal direction thereof, and is connected to or integrated with the hub via a flexible connecting member. The puncture device according to any one of (1) to (5), wherein the puncture device is configured to rotate by deformation to house at least the needle tip of the needle tube via the groove.

(7) The puncture device according to any one of the above (1) to (6), further comprising holding means for holding the protector at the first position.

(8) The puncture device according to (7), wherein the holding means is formed of an elastically deformable engagement piece.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A puncture device according to the present invention will be described below in detail with reference to a preferred embodiment shown in the accompanying drawings.

First, before describing the puncture device of the present invention, an arterial blood sampling device to which the puncture device of the present invention is attached will be described.

FIG. 8 is a longitudinal sectional view showing the configuration of the arterial blood sampling device. In the following description, the upper side in FIG. 8 is referred to as a “proximal end”, and the lower side is referred to as a “distal end”.

The arterial blood sampling device 100 shown in FIG. 8 includes an outer cylinder (syringe) 200, a gasket 300 slidable in the outer cylinder 200, and a plunger 400 for moving the gasket 300.

The outer cylinder 200 is formed of a cylindrical member having a bottom, and a central portion of the bottom 210 is integrally formed with a reduced diameter portion 220 having a diameter reduced from the body of the outer cylinder 200. The reduced diameter portion 220 has a hub (not shown) of the puncture device 1 of the present invention.
Are fitted and mounted for use.

Therefore, when blood is collected from arterial blood,
It is introduced into the outer cylinder 200 through the lumen 230 of the reduced diameter portion 220.

A plate-like flange 240 is integrally formed on the outer periphery of the base end of the outer cylinder 200. For example, when the plunger 400 is moved relative to the outer cylinder 200, the operation can be performed by putting a finger on the flange 240.

In the outer cylinder 200, a gasket 300 made of an elastic material is housed. Gasket 300
Can slide in the outer cylinder 200 in the longitudinal direction of the outer cylinder 200. At this time, the outer peripheral portion 3 of the gasket 300
10 slides while being in close contact with the inner peripheral surface 250 of the outer cylinder 200, and can maintain liquid tightness.

At the center of the gasket 300, there is formed a ventilation hole 320 penetrating from the base end to the front end.

A filter member 350 is provided near the tip of the hole 320 so as to seal the hole 320.
The filter member 350 has a configuration that allows gas to pass through but does not allow liquid to pass.

As a constituent material of the filter member 350, for example, various sintered porous bodies, hydrophobic nonwoven fabrics, and other porous bodies can be mentioned. 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 preferably used.

A plunger 400 for moving the gasket 300 is connected to the base end of the gasket 300.

The plunger 400 is formed of a substantially cylindrical member, and has a mushroom-shaped head portion 410 at its tip.
Are formed. The head portion 410 is fitted into the hole 320 from the proximal end side of the gasket 300 and engages with the engaging portion 330 formed at the proximal end of the gasket 300. Thus, when the plunger 400 is moved in the proximal direction and the distal direction, the gasket 300 is moved accordingly.

Further, the gasket 3
00 and the inner space 43 of the plunger 400
A ventilation hole 420 communicating with each of the holes 0 is formed.

The inner space 430 of the plunger 400 is open to the base end of the plunger 400. A ring-shaped flange 440 is provided on the outer periphery of the base end of the plunger 400.
Are integrally formed. Plunger 400 into outer cylinder 2
For example, when performing a movement operation relative to 00, the operation can be performed by putting a finger on the flange 440.

It is preferable that the constituent material of the outer cylinder 200 is substantially transparent in order to secure the visibility of the inside.

In such an arterial blood sampling device 100, an anticoagulant 500 such as heparin (lithium heparin, sodium heparin) is accommodated in a space 260 surrounded by the outer cylinder 200 and the gasket 300.

The puncture device 1 of the present invention is used by being attached to the distal end of such an arterial blood sampling device 100.

Hereinafter, the puncture device of the present invention will be described. <First Embodiment> FIGS. 1 and 2 are longitudinal sectional views showing a first embodiment of a puncture device according to the present invention, and FIG.
FIG. 4 is a sectional view taken along line XX in FIG. 1, and FIG. 4 is a sectional view taken along line XX in FIG. In the following description, the right side in FIGS. 1 and 2 is referred to as a “proximal end”, and the left side is referred to as a “distal end”.

A puncture device 1 shown in FIGS. 1 and 2 has a needle tube (needle body) 2 having a sharp needle tip 21 at the distal end, a hub 3 fixed to the proximal end of the needle tube 2, and a hub 3 The protector 4 is provided so as to be rotatable (displaceable) with respect to, and a sealing member 7 provided on the protector 4. Hereinafter, the configuration of each unit will be described.

The needle tube 2 is a hollow needle and is made of, for example, a metal material such as stainless steel. A sharp needle tip 21 is formed at the tip of the needle tube 2. The shape of the needle tip 21 is not particularly limited, and in the present embodiment, the needle tube 2
Has a blade surface inclined at a predetermined angle with respect to the axis.

The distal end of the needle tube 2 is open at a distal end opening 22. A hub 3 is fixed (fixed) to the proximal end of the needle tube 2 in a liquid-tight manner, and the lumen of the needle tube 2 communicates with the inside of the hub 3.

The method of fixing the needle tube 2 to the hub 3 is not particularly limited. For example, caulking, fusion (heat fusion,
High-frequency fusion), bonding with an adhesive, and the like.

When the needle tube 2 is covered with the protector 4, the length of the needle tube 2 is such that the needle tip 21 does not protrude (protrude) from the tip of the protector 4.

The hub 3 is formed of a substantially cylindrical member, and is preferably formed of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured.

The hub 3 has a tapered shape whose outer diameter and inner diameter gradually increase toward the base end. The reduced diameter portion 220 of the outer cylinder 200 is inserted and fitted into the tapered portion, whereby the puncture device 1 is attached to the arterial blood sampling device 100.

A flange 31 protruding in a ring shape is formed on the outer periphery of the base end of the hub 3. For example, at the time of the operation of attaching the puncture device 1 to the arterial blood collection device 100 or the operation of removing the puncture device 1 from the arterial blood collection device 100, this operation can be performed by hooking a finger on the flange 31. Can be performed more reliably.

Further, a plurality of (four in the configuration shown) ribs 32 are formed on the outer periphery of the distal end side of the hub 3.

The constituent materials of the hub 3, the protector 4, the connecting member 5, and the fixing member 6, which will be described later, are not particularly limited, and examples thereof include various resin materials such as polyethylene, polypropylene, and polycarbonate.

A protector 4 capable of covering (or accommodating) at least the needle tip 21 of the needle tube 2 is rotatably mounted on such a hub 3.

The protector 4 is connected to a fixing member 6 via a flexible band-shaped (or linear) connecting member 5. In the case of this embodiment, the protector 4 and the connecting member 5
The fixing member 6 is integrally formed of the same material. As a result, the number of parts is small, the configuration is simple,
The protector 4 can be installed rotatably.

The fixing member 6 has a ring shape (annular shape) and is fixed to the hub 3 by fitting.

Although the fixing member 6 is formed in a ring shape (annular shape) in which the entire circumference is connected in the illustrated configuration, the present invention is not limited to this. For example, the fixing member 6 may have a C shape in which a part in the circumferential direction is missing. (C-ring).

The method of fixing the fixing member 6 to the hub 3 is not limited to the method of fitting, and includes, for example, adhesion with an adhesive, fusion (heat fusion, ultrasonic fusion, high frequency fusion, etc.), It may be fixed by a caulking member or a fastening tool, or may be integrated with the hub 3.

The protector 4 is formed of a bottomed tubular member, and a groove (slit) 41 is formed in a portion facing the needle tube 2 over the entire length in the longitudinal direction of the tubular portion. That is, as shown in FIG.
It is shaped like a letter. The protector 4 can accommodate at least the needle tip 21 of the needle tube 2 therein through the groove 41.

The protector 4 is separated from the first position (see FIGS. 1 and 2) covering at least the needle tip 21 of the needle tube 2 by deforming the flexible connecting member 5. It rotates (displaces) with the second position (see FIG. 1).

In this case, the range of the rotation angle of the protector 4 due to the deformation of the connecting member 5 (the range of the maximum rotatable angle) is not particularly limited, but is preferably about 45 to 180 °, and is preferably 80 to 120 °. More preferably, it is in the order of magnitude.
Within such a range, operability such as puncturing is particularly excellent.

The flexible band-shaped connecting member 5
Is preferable in that the structure is simple and the manufacturing is easy. However, the present invention is not limited to this. A mechanism can also be employed. in this case,
The rotation mechanism has a function of fixing the posture (rotation angle) of the protector 4, in particular, multi-stages (for example, postures A, B,
C) may have the function of fixing.

A sealing member 7 is provided inside the distal end of such a protector 4. This sealing member 7
At about the same time (or continuously) when the protector 4 is set to the first position, the needle tip 21 of the needle tube 2 is buried and stored therein, and the tip opening 22 of the needle tube 2 is preferably airtightly sealed. Stop.

By sealing the distal end opening 22 of the needle tube 2 with the sealing member 7 in an airtight manner, the oxygen and carbon dioxide in the atmosphere are more reliably mixed into the arterial blood collected in the arterial blood sampling device 100. Is prevented. Thereby, it is possible to more accurately analyze and measure the gas partial pressure, pH, and the like in blood.

In a conventional cap or the like containing a sealing member, the cap is mounted so as to cover the needle tube 2 by moving the cap in the axial direction of the needle tube 2 from the needle tip 21 side of the needle tube 2. If the user does not enter the base end opening and removes the opening, the finger picking the cap may be erroneously stabbed with the needle tip 21 of the needle tube 2. In 1, the protector 4 approaches from the side of the needle tube 2, covers the needle tip 21, and furthermore, almost simultaneously (or continuously), the tip opening 22 of the needle tube 2 is sealed by the sealing member 7. In addition, it is possible to effectively prevent erroneous stabs and contamination due to blood adhesion as described above, and the operation is simple.

The sealing member 7 has a portion corresponding to the groove 41 of the protector 4 (in FIG.
A notch 71 is formed on the lower side. The notch 71 has a function of guiding the needle tip 21 of the needle tube 2 toward the center of the sealing member 7 when the protector 4 covers the needle tip 21 of the needle tube 2. Thereby, the sealing member 7
The needle tip 21 of the needle tube 2 can be housed more reliably inside.

The sealing member 7 is made of an elastic material (high-viscosity material). Examples of the elastic material include, but are not particularly limited to, various rubbers such as silicone rubber and urethane rubber, and various thermoplastic elastomers such as polyurethane-based and polystyrene-based materials. Putty, clay, and paraffin can also be used. Good.

When the needle tip 21 of the needle tube 2 is housed inside, the sealing member 7 has a function of tightly fixing to the outer peripheral portion of the needle tip 21 of the needle tube 2 by its own elastic force (adhesive force). Also have. In other words, the sealing member 7 is fixed to the needle tube 2 when the needle tip 21 of the needle tube 2 is housed inside. Accordingly, the protector 4 including the sealing member 7 is fixed (held) in a state (first position) covering the needle tip 21 of the needle tube 2.

In order to more securely hold the protector 4 at the first position, it is preferable to provide holding means for the protector 4. In the present embodiment, the holding means is engaged with the inside of the protector 4 as the holding means. A piece 42 is provided (see FIGS. 1, 2, and 4).

The engaging piece 42 is an elastically deformable plate-like member, as shown in FIG. 4, which is formed integrally with the protector 4 or a member in which another member is fixed to the protector 4. Good.

When the needle tube 2 enters the protector 4 via the groove 41, the engaging piece 42 can move to the far side of the protector 4 beyond the engaging piece 42. Then, even if the needle tube 2 attempts to move in the direction in which the needle tube 2 tends to come out of the protector 4 (downward in FIG. 4), the needle tube 2
Abuts against the engaging piece 42, the end 421 of the engaging piece 42 pressed downward in FIG. 4 by the needle tube 2 comes into contact with the inner surface of the protector 4, and cannot move further downward. From going out of the groove 41 beyond the engagement piece 42.

By providing such holding means,
In the puncture device 1, the needle tip 21 is more reliably prevented from being accidentally exposed to the outside of the protector 4, so that the sealing of the distal end opening 22 of the needle tube 2 is more reliably maintained, and high safety is maintained. Is done.

It is needless to say that the structure, function and the like of the holding means are not limited to those shown in the drawings.
A clip, a chuck, or the like that holds the needle tube 2 may be used.

Next, an example of a method of using the puncture device 1 will be described in detail. [1] The reduced diameter portion 220 of the outer cylinder 200 is attached to the hub 3 of the puncture device 1.
Is inserted and fitted, and the puncture device 1 is mounted on the arterial blood sampling device 100. Further, the protector 4 is moved, for example, from position A to position B.
At an arbitrary position (a position that does not interfere with the puncturing operation: the second position), the state is separated from the needle tube 2 and the arterial blood sampling device 100 is gripped.

The position of the protector 4 can be appropriately selected according to the operator's request, so that the operation can be performed more easily.

[2] In this state, when the needle tip 21 of the needle tube 2 is punctured into the artery of the patient, arterial blood is introduced into the outer cylinder 200 (space 260) by the pressure in the artery.

The air in the space 260 is discharged through the filter member 350 due to the inflow of the arterial blood.
Arterial blood cannot pass through the filter member 350 and does not leak to the outside. Further, when a filter member 350 made of a material mixed (including) with a water-swellable polymer is used, the space 250 is filled with blood, and when the filter member 350 is impregnated with the blood, the filter member 350 expands and the outside air It can also cut off blood contact.

At the time of this operation, the fixing member 6
The (protector 4) does not rotate in the circumferential direction, and the operation can be performed reliably.

[3] When the space 260 is filled with arterial blood, the needle tip 21 of the needle tube 2 is extracted from the patient's artery.

[4] Next, the protector 4 is rotated counterclockwise in FIG. 1 to be displaced from the position B to the position C (first position). At this time, the needle tip 21 of the needle tube 2
Of the sealing member 7 contacts the notch 71 of the sealing member 7 and moves toward the center of the sealing member 7 along the notch 71. Further, when the protector 4 is pressed in the counterclockwise direction in FIG. 1 with a finger or the like, the needle tip 21 of the needle tube 2 moves to the back side of the protector 4 so as to cut the sealing member 7.

The sealing member 7 returns to a substantially original shape by its own elastic force, and the sealing member 7 adheres to the outer peripheral portion of the needle tip 21 of the needle tube 2 while the cut portion is in close contact ( (See FIG. 3).

As a result, the protector 4 reaches the position C (first position) and is held at the first position.
The sealing member 7 embeds and stores the needle tip 21 of the needle tube 2 therein, and hermetically seals the distal end opening 22 of the needle tube 2.

At this time, the needle tube 2 moves to the far side of the protector 4 beyond the engaging piece 42 and comes into contact with the inner surface of the protector 4. In this state, even if the needle tube 2 attempts to return (even if it moves in the direction of the second position), the needle tube 2 causes the engagement piece 42 to move It is prevented from going out of the groove 41. Thereby, the protector 4 is more reliably held at the first position.

[5] As described above, the needle tip 2 of the needle tube 2
When the puncture device 1 is stored in the protector 4 and the distal end opening 22 of the needle tube 2 is sealed by the sealing member 7, the action of the anticoagulant 500 can be suitably exerted with the puncture device 1 attached. In addition, the arterial blood sampling device 100 is given a swing, a vibration, a rotation, an upside down, and the like to assist the dissolution and mixing of the anticoagulant 500 into the arterial blood. Next, the arterial blood is subjected to analysis and examination of blood partial pressure, pH and the like in the blood.

<Second Embodiment> FIG. 5 is a sectional view showing the structure of a sealing member according to a second embodiment of the puncture device of the present invention.

Hereinafter, the puncture device according to the second embodiment will be described focusing on the differences from the first embodiment, and the description of the same items will be omitted.

In the second embodiment, the structure of the sealing member 7 is different, and the rest is the same as the first embodiment.

That is, the sealing member 7 shown in FIG. 5 is in a direction perpendicular to the groove 41 of the protector 4 (vertical direction in FIG. 5).
In the vicinity of the top of the notch 71, the needle tip 2 of the needle tube 2
A slit 72 through which the first needle 1 passes (the needle tip 21 of the needle tube 2 can be inserted) is formed.

Thus, when performing the same step as the above [4], the needle tip 21 of the needle tube 2 can be moved (reached) inside the sealing member 7 along the notch 71 and the slit 72. Therefore, this operation can be performed more easily and reliably.

With such a configuration, the same operation and effect as those of the first embodiment can be obtained.

<Third Embodiment> FIG. 6 is a partial cross-sectional view showing the structure of the distal end side of a protector according to a third embodiment of the puncture device of the present invention. FIG. 7 is a longitudinal sectional view showing the configuration of the distal end side of the protector in the third embodiment of the puncture device of the present invention.

Hereinafter, the puncture device of the third embodiment will be described focusing on the differences from the first embodiment, and the description of the same items will be omitted.

That is, the protector 4 shown in FIGS. 6 and 7 includes a protector main body 43 and the protector main body 4.
A storage unit 4 provided at the tip of the storage unit 3 and storing the sealing member 7
4 is provided.

The protector body 43 is formed of a substantially cylindrical member, and has a groove 431 in a portion facing the needle tube 2 over substantially the entire length in the longitudinal direction.

At the tip of the protector body 43,
A pair of substantially parallel slits 432 provided at a predetermined length from the distal end are formed, and an elastically deformable leaf spring (elastic piece) 433 is formed between them.

The leaf spring 433 has a base end at a fixed end,
The distal end is a cantilever supported by the protector body 43 with the movable end being elastically displaced (deformed) in the vertical direction (a direction substantially perpendicular to the needle tube 2) in FIGS. 6 and 7.
I do.

The inner surface of the tip of the leaf spring 433 (FIG. 6)
7, a claw (projection) 434 protruding toward the inside of the protector body 43 is formed integrally with the protector body 43. The claw 434 engages with a concave portion 441 formed at the base end of the storage portion 44 described later.

At the distal end of the protector main body 43, a housing (slide) 44 relatively movable along the longitudinal direction is provided. The storage section 44 is formed of a bottomed cylindrical member, and the sealing member 7 is stored therein.

The outer diameter of the storage section 44 is set substantially equal to the inner diameter of the protector body 43. That is, the protector main body 43 and the storage section 44 have their central axes substantially coincident. Accordingly, it is possible to preferably prevent the central axes from being displaced during the operation of moving the storage portion 44 relative to the protector main body 43, and the needle tube is provided inside the sealing member 7. The second needle tip 21 can be stored more reliably.

Further, a claw 434 is provided at the base end of the storage section 44.
Is formed with a concave portion 441 that can be engaged with. Storage section 44
Is positioned at the distal end of the protector body 43,
When the claw 434 is engaged with the protector body 43, the storage portion 44 is prevented (prevented) from further moving in the distal direction from the state shown in FIG. As a result, the storage section 44 is prevented from dropping (disconnecting) from the protector body 43. That is, these claws 434 (leaf spring 43)
3) and the recess 441, the protector body 4 of the storage section 44
A departure preventing means for preventing departure from the device 3 is constituted.

In the illustrated configuration, the concave portion 441 is formed in a part of the outer circumference of the storage portion 44, but is not limited to this, and is formed in a ring shape (annular shape) over the entire length of the outer peripheral surface of the storage portion 44. ) May be formed.

Next, an example of a method of using the puncture device 1 having such a protector 4 will be described in detail.

First, the same steps as in the above [1] to [3] are performed. [4 ′] Next, the protector 4 is rotated counterclockwise in FIG. 1 to be displaced via the position B to the position C (first position). Thus, the needle tip 21 of the needle tube 2 is stored in the protector 4.

At this time, the needle tube 2 moves to the far side of the protector 4 beyond the engagement piece 42 and comes into contact with the inner surface of the protector 4. In this state, even if the needle tube 2 attempts to return (even if it moves in the direction of the second position), the needle tube 2 causes the engagement piece 42 to move It is prevented from going out of the groove 41. As a result, the protector 4 is held at the first position.

Next, when the distal end of the storage portion 44 is pressed by a finger or the like in the proximal direction of the protector body 43 (the direction of the arrow in FIG. 6), the engagement of the claw 434 with the concave portion 441 is released. Further, when the distal end of the storage section 44 is pressed in the proximal direction, the claw 4
While the vicinity of the top of 34 is in sliding contact with the outer surface of the storage section 44, the storage section 44 moves in the proximal direction of the protector main body 43,
It enters the inside of the protector body 43. Thus, the sealing member 7 embeds and stores the needle tip 21 of the needle tube 2 therein, and hermetically seals the distal end opening 22 of the needle tube 2.

Next, the same step as the above [5] is performed. With such a configuration, the same operation and effect as those of the first embodiment are obtained.

The puncture device according to the present invention has been described with reference to the illustrated embodiments. However, the present invention is not limited to these embodiments, 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 sealing member may be configured to abut on the distal end opening of the needle tube to seal the distal end opening.

The displacement between the first position and the second position of the protector is not limited to the rotation, but is relatively moved (slid) along the longitudinal direction of the needle tube, for example. Or the like.

Further, the puncture device of the present invention comprises the first to third punctures.
Any combination of two or more of the embodiments may be used.

[0103]

As described above, according to the present invention, the needle tube after blood collection can be housed in the protector quickly and safely with a simple operation, and the distal end opening of the needle tube is sealed. be able to.

Since the needle tip of the needle tube is housed inside the sealing member, the opening at the distal end of the needle tube can be more reliably sealed.

When the protector is configured to be displaced by rotation, the operability of the puncturing operation can be further improved.

Further, according to the present invention, the above effects can be achieved 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 a sectional view taken along line YY in FIG. 2;

FIG. 4 is a sectional view taken along line XX in FIG. 1;

FIG. 5 is a cross-sectional view illustrating a configuration of a sealing member according to a second embodiment of the puncture device of the present invention.

FIG. 6 is a partial cross-sectional view showing a configuration of a distal end side of a protector in a puncture device according to a third embodiment of the present invention.

FIG. 7 is a longitudinal sectional view showing a configuration of a distal end side of a protector in a puncture device according to a third embodiment of the present invention.

FIG. 8 is a longitudinal sectional view showing a configuration of an arterial blood sampling device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 puncture device 2 needle tube 21 needle tip 3 hub 31 flange 32 rib 4 protector 41 groove 42 engaging piece 421 end 43 protector main body 431 groove 432 slit 433 leaf spring 434 claw 44 storage section 441 concave section 5 connecting member 6 fixing member 7 Stop member 71 Notch 72 Slit 100 Arterial blood sampling device 200 Outer cylinder 210 Bottom part 220 Reduced diameter part 230 Lumen 240 Flange 250 Inner peripheral surface 260 Space 300 Gasket 310 Outer peripheral part 320 Hole 330 Engagement part 350 Filter member 400 Plunger 410 Head part 420 hole 430 internal space 440 flange 500 anticoagulant

Claims (8)

[Claims] 1. A puncture device used by being attached to a distal end portion of an arterial blood sampling device, comprising: a needle tube having a needle tip at a distal end; a hub installed at a proximal end of the needle tube; and at least a needle of the needle tube A protector displaceable between a first position covering the tip and a second position separated from the needle tube, wherein when the protector is at the first position, a distal end opening of the needle tube is sealed. A puncture device, wherein a seal member capable of being provided is provided on the protector. 2. The protector comprises: a protector body;
A storage portion provided at a distal end portion of the protector main body and storing the sealing member, wherein the storage portion is installed so as to be relatively movable along a longitudinal direction of the protector main body; By moving the storage section toward the base end of the protector body,
The puncture device according to claim 1, wherein the sealing member is configured to hermetically seal a distal end opening of the needle tube. 3. The puncture device according to claim 2, further comprising detachment preventing means for preventing detachment of the storage portion from the protector body. 4. The sealing member is made of an elastic material,
The puncture device according to any one of claims 1 to 3, wherein a needle tip of the needle tube is housed therein to hermetically seal a distal end opening of the needle tube. 5. The puncture device according to claim 4, wherein the sealing member has a slit into which the needle tip of the needle tube can be inserted. 6. The protector has a groove formed along the longitudinal direction thereof, and is connected or integrated with the hub via a flexible connecting member. The puncture device according to any one of claims 1 to 5, wherein the puncture device is configured to rotate so as to receive at least a needle tip of the needle tube via the groove. 7. The puncture device according to claim 1, further comprising holding means for holding the protector at the first position. 8. The puncture device according to claim 7, wherein the holding means is constituted by an elastically deformable engagement piece.