JPH0819528A - Holder for blood collecting tube - Google Patents

Abstract

(57) [Abstract] [Structure] Cylindrical plastic blood collection tube holder body 1
At the time of inserting the blood collection tube into the holder body 1,
Plural flexible fins 5 are provided so as to abut and surround the sealing portion of the blood collection tube so as to project toward the opening, and the blood collection tube is guided to the inner wall of the holder near the opening of the holder in the axial direction of the holder. Blood collection tube holder provided with a plurality of ribs 6 for [Effect] It is possible to prevent the kickback phenomenon in the blood collection tube holder during blood collection.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a blood collection tube holder.

[0002]

2. Description of the Related Art When performing a blood test such as a serum test and a blood cell test in a clinical test, a blood sample is usually collected by a blood collecting device. This blood collection device comprises a blood collection tube holder, a hollow needle, and a reduced pressure blood collection tube. The blood collection tube holder has a hollow needle penetrating the needle mounting portion at the front end thereof. The front part of the hollow needle serves as a blood collection needle, and the rear part of the hollow needle serves as a blood supply needle for the decompression blood collection tube, and a sheath having rubber-like elasticity is externally fitted to the tip of this blood supply needle. . Further, the decompression blood collection tube is composed of a bottomed tube and a sealing member inserted into the opening of the bottomed tube, and the inside of the tube is decompressed according to the blood collection amount required for the blood test.

At the time of blood collection, a blood collection needle is punctured in the blood donor, and the blood collection tube is inserted into the blood collection tube holder from the side having the sealing member.
A rubber-like sheath body is compressed by the sealing member in the axial direction, and the sheath body / sealing member is passed through at the rear part of the hollow needle.
As a result, a predetermined amount of blood sample is collected according to the degree of pressure reduction in the vacuum blood collection tube.

Blood collection tubes after blood collection are often analyzed by an automatic chemical analyzer. In this device, the test needle is inserted into the sealing member while the reduced pressure blood collection tube is installed in the rack so that the blood sample can be collected.

In this case, the piercing resistance of the sealing member with respect to the test needle is made small so that a blood sample can be collected efficiently and easily.

[0006]

When a reduced-pressure blood collection tube provided with a sealing member having such a small piercing resistance is put into a blood collection tube holder for use, the sheath body compressed during blood collection has a rubber-like elasticity. The repulsive force becomes larger than the frictional force between the needle and the sealing member for keeping the hollow needle in the sealing member, and the vacuum blood collection tube is retracted in the holder, and the hollow needle is sealed. A phenomenon of falling out of the member, a so-called kickback phenomenon occurs.

The present invention has been made to solve the problem of the kickback phenomenon in the blood collection tube holder.

[0008]

SUMMARY OF THE INVENTION The present invention provides a cylindrical plastic blood collection tube holder body having a needle joint portion for connecting a hollow needle at one end and an opening at the other end. When a blood vessel is inserted, a plurality of flexible fins are provided so as to abut and surround the sealing portion of the blood collection tube so as to project from the inside of the holder body toward the opening, and the fins are collected on the inner wall of the holder near the holder opening. A gist of a blood collection tube holder is provided with a plurality of ribs for guiding a blood vessel in the axial direction of the holder.

In the present invention, the hollow needle is a blood collection needle whose tip outside the holder is for blood collection, and the tip inside the holder is a needle for puncturing the sealing member of the blood collection tube. The tip of the latter needle is usually fitted with a sheath body having rubber-like elasticity. In the present invention, the needle joint portion of the holder has a needle base portion that supports the hollow needle.

In the present invention, the holder body, fins,
The ribs are made of plastic. If possible, integral molding is preferable in order to reduce processing costs. As plastic, polypropylene, polyethylene, polyvinyl chloride, polycarbonate, polystyrene, etc. are used. It is preferable that the material of the fin has a relatively large elongation in the plastic so that the blood collection tube can be firmly grasped and the elastic recovery property is excellent.

In the present invention, when the blood collection tube is inserted into the holder body, the fin is provided with a plurality of flexible fins projecting toward the opening so as to abut and surround the sealing portion of the blood collection tube. . This is one of the important constituent features of the present invention. During blood collection, when a sheath that exhibits rubber-like elasticity is compressed in the axial direction of the hollow needle by the sealing member of the blood collection tube, kickback does not occur even if repulsive force of the sheath occurs, that is, the blood collection tube does not retreat The fins of the present invention are intended to work like this. Therefore, the fin has flexibility, and the number of fins is preferably 3 or more. However, even if the number of fins is too large, its function does not matter, but it is unlikely that the number of fins is 10 or more in order to mold. Since the fin of the present invention is for preventing kickback, the position of the fin must be provided in the holder so as to come into contact with the sealing member of the blood collection tube.

In the present invention, a plurality of ribs are provided on the inner wall of the holder near the opening of the holder to guide the blood collection tube in the axial direction of the holder. Although the inner diameter of the blood collection tube holder body of the present invention matches the size of the reduced pressure blood collection tube, especially the size of the sealing portion attached to the blood collection tube, this inner diameter is universally used for blood collection tubes of various sizes. Larger than the outer diameter of the blood collection tube to be accepted. Therefore, a rib is provided so that the hollow needle punctures the center of the sealing member of the blood collection tube. It is preferable that three or more ribs are provided from the opening of the holder body toward the inside.

Blood collection is carried out in the conventional manner. A reduced-pressure blood collection tube is inserted into the holder of the present invention, and the hollow needle inside the holder is inserted until it penetrates the sealing portion of the blood collection tube. Therefore, the size and position of the hollow needle in the holder is no different from the conventional holder.

[0014]

In the present invention, a rib is provided on the inner wall of the holder body, and the hollow needle punctures the center of the sealing member of the blood collection tube. Next, the sheath that exhibits rubber-like elasticity is compressed in the axial direction of the hollow needle by the sealing member of the blood collection tube, but the force of suppressing the blood collection tube with the flexible fins is greater than the repulsive force of this sheath. This is to prevent the blood collection tube from retreating, that is, to prevent kickback.

[0015]

Since the present invention has the above configuration,
It is possible to prevent a so-called kickback phenomenon in which the hollow needle is pulled out from the sealed portion of the reduced pressure blood collection tube in the holder during blood collection with the reduced pressure blood collection tube.

[0016]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention. In the figure, the holder body 1 has a needle insertion portion 7 and a flange portion 8 and is tapered from the opening toward the inside, that is, from the flange portion 8 toward the needle insertion portion 7. Therefore, as long as the reduced pressure blood collection tube can be inserted into at least the holder main body 1, it is possible to cope with the sealing portion having various sizes. The hollow needle 3 is fixed to the needle insertion portion 7 by the hub 2, and the tip of the hollow needle 3 in the holder is covered with the sheath body 4.

When inserting a vacuum blood collection tube (not shown), the hollow needle is guided by the rib 6 so as to pierce the center of the sealing member of the blood collection tube, and the hollow needle 3 punctures the center of the sealing member. It is supported by the fins 5 and resists the repulsive force of the sheath body 4 so that kickback does not occur.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Holder body 2 Hub 3 Hollow needle 4 Sheath body 5 Fin 6 Rib 7 Needle mounting part 8 Flange part

Claims (1)

[Claims] 1. A cylindrical plastic blood collection tube holder having a needle joint portion for connecting a hollow needle at one end and an opening at the other end, when the blood collection tube is inserted into the holder body. A plurality of flexible fins that abut and surround the sealing portion are provided so as to project from the inside of the holder body toward the opening, and the blood collection tube is guided to the inner wall of the holder near the opening of the holder in the axial direction of the holder. A blood collection tube holder, which is provided with a plurality of ribs.