JPH0634787B2 - Blood collection tube holder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a blood collection tube holder. More specifically, the present invention relates to a blood collection tube holder in which the angle formed by the blood collection site and the blood collection needle is reduced when the blood collection needle is inserted into the blood collection site.

[Conventional technology]

In the conventional blood collection system used in clinical tests at hospitals, etc., serum tests, blood cell tests, blood glucose tests,
Using several types of blood collection tubes for clotting factor tests, etc., a single blood collection needle, which is usually called a multi-needle attached to a blood collection tube holder, performs blood collection operations from the examinee several times, I was getting the blood sample I needed.

The blood collection tube used at that time, for example, the reduced pressure blood collection tube 5a, is a glass or plastic bottomed tube as shown in FIG.
11 and a rubber stopper 30 are used. The reduced pressure blood collection tube 5a is used by inserting it into a cylindrical blood collection tube holder 2b having the multi-needle 4 attached thereto and having the rubber plug 30 pierce the rubber piercing portion 17 of the multi-needle 4. The multi-needle 4 is provided with a blood vessel piercing portion 16 that pierces a blood vessel.
And a rubber piercing portion 17 in which a rubber tip 19 is covered in the blood collection tube holder 2b, and a needle base portion 18 for supporting the blood vessel and the rubber piercing portions 16 and 17, respectively. Since these are in communication with each other, the multi-needle 4 is attached to the blood collection tube holder 2b, the blood vessel piercing portion 16 of the multi-needle 4 is pierced into the blood collection site blood vessel, and the blood collection tube holder 2b is kept in that state. Vacuum blood collection tube
When 5a is inserted, the rubber piercing portion 17 of the multi-needle 4 pierces the rubber tip 19 and the rubber stopper 30, and the blood vessel and the reduced pressure blood collection tube 5a communicate with each other via the multi-needle 4. Then, blood is drawn from the blood vessel into the reduced pressure blood collection tube 5a via the multi-needle 4.

However, when using the automatic serum collection device, a vacuum blood collection tube that can be used as it is without removing the rubber stopper 30 from the vacuum blood collection tube 5a is preferable. Therefore, the applicant of the present application, as shown in FIG. 9, covers the opening of the bottomed tube 11 with a sealing member 13 so that the needle of the automatic serum fractionation device can be directly pierced through the rubber stopper. We have applied for a reduced pressure blood collection tube 5a that does not require 30 and prevents contamination from the outside.

The reduced pressure blood collection tube 5a is used by inserting it into a cylindrical blood collection tube holder 2b to which the multi-needle 4 is attached. That is, when the multi-needle 4 is attached to the blood collection tube holder 2b, the blood vessel piercing portion 16 of the multi-needle 4 is pierced into the blood collection site blood vessel, and the reduced pressure blood collection tube 5a is inserted into the blood collection tube holder 2b in that state. As described above, the rubber piercing part 17 of the multi-needle 4 pierces the rubber tip 19 and the sealing member 13, and the blood vessel and the reduced pressure blood collection tube 5b communicate with each other through the multi needle 4, so that blood is reduced in pressure.
Blood is collected inside. When the blood collection of the first reduced pressure blood collection tube 5b is completed, only the first reduced pressure blood collection tube 5b is removed from the blood collection tube holder 2b while the multi-needle 4 is pierced through the blood vessel, and the next reduced pressure blood collection tube 5b is collected again. Insert into the holder 2b and collect blood in the next reduced pressure blood collection tube 5b. Thereafter, blood is collected in the reduced pressure blood collection tube 5b by the required number. Therefore, the blood collection tube holder described above
When blood is collected using 2b, the angle β formed by the blood collection site and the multi-needle 4 is as shown in FIG. 6 (b), and this angle β is considerably large, so the reduced pressure blood collection tube is used.
When exchanging 5b, it is painful if the blood collection tube holder 2b is not supported.

[Problems to be Solved by the Invention] However, when blood is collected by the multi-needle 4 attached to the blood collection tube holder 2b using the above-described reduced pressure blood collection tubes 5a and 5b, the angle β formed between the blood collection site and the multi-needle 4 As described above, since the size is considerably large, the blood collection tube holder 2b moves and is distressed when the reduced pressure blood collection tubes 5a and 5b are attached and detached. Particularly, in the case of the reduced pressure blood collection tube 5a, since the rubber stopper 30 is used, the puncture resistance of the rubber piercing portion 17 of the multi-needle 4 is large, and the reduced pressure blood collection tube 5a
When attaching or detaching, the blood collection tube holder 2b is easy to move, and the pain is increased accordingly.

Therefore, in order to reduce the angle β formed by the blood collection site and the multi-needle 4, it is known that the needle coupling part 3 of the blood collection tube holder 2b is not provided in the axial center of the holder body 6 but is provided eccentrically. . However, when the reduced pressure blood collection tube 5a is used, since the rubber piercing portion 17 has a large piercing resistance as described above, the multi-needle 4 must be screwed to the needle connecting portion 3, When inserting the reduced pressure blood collection tube 5a into the blood collection tube holder 2b, the multi-needle 4 may be disengaged from the needle coupling section 3. However, when screwing, it was difficult to align the blade surfaces, and it was difficult to put it into practical use.

Therefore, the present invention has been made in view of the above circumstances, and when the blood collection needle is pierced into the blood collection site, the angle formed between the blood collection site and the blood collection needle is reduced to increase pain when attaching or detaching the blood collection tube. It is an object to provide a blood collection tube holder that does not have a problem.

[Means for Solving the Problems] In order to solve the above problems, the blood collection tube holder of the present invention comprises:
A cylindrical blood collection tube holder integrally formed with one end forming a needle connection part for connecting a blood collection needle and the other end forming an insertion part for inserting a blood collection tube, the needle connection The diameter of the portion is reduced from the meeting portion between the needle coupling portion and the insertion portion to the tip of the needle coupling portion, and any one point on the outer circumference of the needle coupling portion to any one point on the outer circumference of the needle coupling portion tip. The angle formed by the shortest straight line connecting the line and the axis of the needle connecting portion is 25 ° or less, and the shortest straight line and the needle connecting portion do not intersect.

[Operation] According to the blood collection tube holder configured as described above, when the blood collection needle is attached to the needle connection part of the blood collection tube holder and the blood collection needle is pierced through the blood collection site, the needle connection part is The diameter is reduced from the association portion with the insertion portion to the tip of the needle coupling portion, and the shortest straight line connecting any one point on the outer periphery of the association portion to any one point on the outer periphery of the tip end of the needle coupling portion and the needle coupling. The angle formed with the axis of the part is 25 ° or less, and the shortest straight line and the needle connecting part do not intersect, the angle formed between the blood sampling site and the blood sampling needle becomes small, and the piercing angle is gentle. Therefore, it is easy to pierce, and the blood collection tube holder becomes difficult to move when attaching and detaching the blood collection tube, so that the patient is not hurt.

[Examples] Hereinafter, examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view showing a use state of a blood collection tube holder of the present invention, and FIG. 2 is a front view showing a cross section of a part of the blood collection tube holder,
FIG. 3 is a vertical sectional view taken along the line III-III in FIG. In the drawings, reference numeral 1 denotes a blood collecting device, which comprises a blood collecting tube holder 2, a multi-needle (blood collecting needle) 4 attached to a needle coupling part 3 at one end of the blood collecting tube holder 2, and the blood collecting device. The blood vessel holder 2 includes a reduced pressure blood collection tube (blood collection tube) 5 inserted through an opening at the other end of the blood vessel holder 2.

The blood collection tube holder 2 is made of plastic such as polypropylene. And blood collection tube holder 2
Is formed in a substantially cylindrical shape, has one end opened and holds the reduced pressure blood collection tube 5, and has a collar 7 to form an insertion portion 6 for facilitating blood collection operation. The other end is integrally provided with the needle coupling portions 3 with their axes substantially aligned with each other. The diameter of the insertion portion 6 becomes gradually smaller from the collar 7 toward the needle coupling portion 3 side, and a step 9 is provided in front of the needle coupling portion 3 and further becomes one step thinner so that the fitting portion of the reduced pressure blood collection tube 5 can be fitted. Forming 10.
It is desirable that the fitting portion 10 has a predetermined length of at least 5 mm in the insertion direction of the reduced pressure blood collection tube 5. 5 mm
If the length is less than, it is necessary to gradually increase the mating force for smooth mating, and it is too short to increase the mating force from zero to the prescribed mating force. This is because there is a risk that it will not be obtained.

It should be noted that when the reduced pressure blood collection tube 5 is inserted into the insertion portion 6, the resistance to pierce the sealing member 13 described later with the rubber piercing portion 17 of the multi-needle 4 is relatively reduced. Before the 13 is pierced, the reduced pressure blood collection tube 5 is fitted into the fitting portion 10 to increase the fitting force between the insertion portion 6 and the reduced pressure blood collection tube 5 in advance.

As shown in FIG. 2 (a), the needle coupling portion 3 is formed so as to gradually become thinner from the meeting portion S between the needle coupling portion 3 and the insertion portion 6 toward the tip. The angle α between the shortest straight line K ₁ connecting the arbitrary point P _{1 on the} outer periphery of the meeting portion S to the arbitrary point P ₂ on the outer periphery of the tip of the needle coupling portion 3 and the axis K ₂ of the needle coupling portion 3 is It is set to 25 ° or less and the shortest straight line K ₁ is set so as not to intersect with the needle connecting portion 3.

Also, the length from the meeting portion S to the tip surface of the needle coupling portion 3 (L ₁ )
Is preferably at least 12 mm. L ₁ is 12 mm
If the angle is less than the above, even if the above-mentioned angle of 25 ° is satisfied, the fitting part
The length L ₂ of the outer diameter of 10 is shortened. Therefore, the decompression blood collection tube 5 fitted in the fitting portion 10 must be made thin, and the standard of the conventional decompression blood collection tube 5 must be changed. Because.

Further, a screw 8 is engraved on the inner peripheral surface of the needle coupling portion 3. Incidentally, the inner peripheral surface of the needle coupling portion 3 may be a fitting surface instead of the screw 8. In this case, the multi-needle 4 must also have a fitting surface.

FIG. 2B shows another embodiment of the blood collection tube holder 2. The blood collection tube holder 2a has a convex portion 10a on the inner peripheral surface of the insertion portion 6 from the substantially central portion in the longitudinal direction to the side of the needle coupling portion 3 instead of the fitting portion 10 of the blood collection tube holder 2 in FIG.
Is provided in three places. The other points are the same as those of the blood collection tube holder 2 in FIG. 2 (a), and the description of the configuration will be omitted by giving the reference numerals to the drawings.

The reduced pressure blood collection tube 5 includes a bottomed tube 11 having one end open and the other end closed, a serum separating agent 12a contained in the bottomed tube 11, a non-woven fabric 12b coated with an activator, and a bottomed tube 11. A sealing member (13) is attached to the opening surface and seals the inside of the bottomed tube (11).

Then, the inside of the bottomed tube 11 sealed by the sealing member 13,
Although it is not always necessary to reduce the pressure, it is preferable to set a predetermined degree of pressure reduction according to the amount of blood collected, and the pressure is reduced here.

The bottomed tube 11 has a test tube shape as shown in FIG.
It is made of glass, acrylonitrile resin, or plastic having gas barrier properties such as polyethylene terephthalate.

The serum separating agent 12a is for firmly blocking the blood clot by centrifuging after the blood is collected in the blood collection tube, and further promoting coagulation by the activator applied to the nonwoven fabric 12b.

A film portion 14 having a gas barrier property of the sealing member 13.
Is made of aluminum foil, various films vapor-deposited with aluminum, and various films coated with a gas barrier material such as polyvinylidene chloride, polyvinyl alcohol, and ethylene vinyl alcohol copolymer. or,
An adhesive layer may be provided in advance on the reduced pressure blood collection tube 5, and the sealing member 13 may be adhered to the adhesive layer.

The sealing member 13 has a film portion 14 and a resealable rubber member 15 attached thereto. This resealable rubber member 15
Is made of a material such as synthetic rubber, natural rubber, and thermoplastic elastomer that has a property of resealing the inside of the reduced pressure blood collection tube 5 when the multi-needle 4 or the like is once pierced and then withdrawn.

The reduced pressure blood collection tube 5 has a multi-needle 4 as shown in FIG.
It is used by inserting it into the blood collection tube holder 2 to which is attached. The multi-needle 4 includes a blood vessel piercing portion 16 that pierces a blood vessel, a rubber piercing portion 17 that pierces the resealable rubber member 15 and the film portion 14, respectively, and the blood vessel piercing portion 16 and the rubber piercing portion. And a needle base portion 18 for supporting each portion 17. A screw 18a is engraved on the outer peripheral surface of the needle base portion 18 adjacent to the rubber piercing portion 17 so that it can be screwed onto the blood collection tube holder 2. As shown in FIG. It is screwed onto the needle coupling part 3 of the blood vessel holder 2. The rubber piercing part 17 is covered with a thin rubber tube, that is, a rubber tip 19.

Next, a method of using the blood collection tube holder 2 having the above configuration will be described.

First, as shown in FIG. 4, the multi-needle 4 is screwed onto the blood collection tube holder 2. Thereafter, the blood vessel piercing portion 16 of the multi-needle 4 is pierced into the blood vessel (see FIG. 5). At this time, the blood collection site B and the multi-needle 4 screwed to the blood collection tube holder 2 form an angle α (see FIG. 6A). In addition, the angle β between the blood sampling site and the multi-needle 4 screwed to the conventional blood collection tube holder 2b
Are configured (see FIG. 6B). Therefore, as is clear from FIGS. 6A and 6B, α <β. According to the blood collection tube holder 2 of the present invention, when the multi-needle 4 is inserted into the blood collection site B, the needle connecting portion 3 of the blood collection tube holder 2 is provided.
The tip surface and the association portion S are in contact with the blood sampling site B, respectively, to support the blood collection tube holder 2, and even if the blood collection tube holder 2 is not always supported, the weight of the blood collection tube holder 2 causes pain. There is almost no. On the other hand, in the conventional example, the blood collection tube holder 2 is in a state in which only one edge of the insertion portion 6 is in contact with the blood collection site B.
If not always supported, the weight of the blood collection tube holder 2 causes pain.

Next, when the reduced pressure blood collection tube 5 is inserted into the insertion portion 6 of the blood collection holder 2, the reduced pressure blood collection tube 5 is fitted into the fitting portion 10 of the insertion portion 6. When the insertion is further continued, the rubber piercing part 17 of the multi-needle 4
Pierces the rubber chip 19, the resealable rubber member 14 of the sealing member 13 of the reduced pressure blood collection tube 5, and the film portion 14, respectively, and the blood vessel and the reduced pressure blood collection tube 5 communicate with each other via the multi-needle 4. Then, blood according to the degree of reduced pressure in the reduced pressure blood collection tube 5 is collected from the blood vessel. The blood in the reduced-pressure blood collection tube 5 thus collected is sampled by an automatic serum collecting device or the like, and is used for various serum tests.

[Effects of the Invention] As described in detail above, according to the blood collection tube holder of the present invention, when the blood collection needle is attached to the needle connection part of the blood collection tube holder and the blood collection needle is pierced through the blood collection site, the needle connection part becomes The diameter is reduced from the meeting point between the needle coupling section and the insertion section to the tip of the needle coupling section, and the shortest connecting any one point on the outer circumference of the needle coupling section to any one point on the tip circumference of the needle coupling section. The angle between the straight line and the axis of the needle connecting part is 25 ° or less, and since the shortest straight line and the needle connecting part do not intersect, the angle formed between the blood collecting site and the blood collecting needle becomes small, When attaching or detaching the blood collection tube to or from the blood vessel holder, the blood collection tube becomes difficult to move. Therefore, even if the blood collection tube is attached / detached to / from the blood collection tube holder while the blood collection needle is pierced through the blood collection site, the pain is not increased.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention.
The figure is a front view showing the use state of the blood collection tube holder of the present invention,
FIG. 2 is a side view in which a part of the blood collection tube holder is sectioned, and FIG.
1 is a longitudinal sectional view taken along line III-III of FIG. 1, FIG. 4 is a perspective view showing a procedure for mounting a multi-needle and a reduced pressure blood collection tube on a blood collection tube holder, and FIG. 5 is a perspective view showing a blood collection state. FIG. 6 is a side view for explaining the operation of the blood collection tube holder of the present invention.
FIG. 7 and FIG. 8 are longitudinal sectional views showing a conventional use state of a blood collection tube holder. 2, 2a, 2b …… Blood collection tube holder 3 …… Needle connection part 4 …… Multi needle (blood collection needle) 5, 5a, 5b …… Decompression blood collection tube (blood collection tube) 6 …… Insertion part K ₁ …… Shortest Straight line, K ₂ …… Axial line P ₁ …… Any point on the outer circumference of the meeting part P ₂ …… Any point on the outer circumference of the tip of the needle coupling part S …… Meeting part α, β …… Angle

Claims (1)

[Claims] 1. A cylindrical blood collection tube holder which is integrally formed with one end forming a needle connection part for connecting a blood collection needle and the other end forming an insertion part for inserting a blood collection tube. The diameter of the needle coupling portion is reduced from the association portion between the needle coupling portion and the insertion portion to the tip of the needle coupling portion, and the needle coupling portion tip outer periphery from any one point of the association portion outer periphery. The angle between the shortest straight line connecting any one of the points and the axis of the needle connecting part is 25 ° or less, and the shortest straight line does not intersect with the needle connecting part. .