JP2546260Y2 - Biological sample suction needle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological sample suction needle for aspirating a biological sample such as blood or urine contained in a sample container.

[0002]

2. Description of the Related Art Conventionally, as a sample container for storing a biological sample such as blood or urine, for example, there is a vacuum blood collection tube shown in FIG. The vacuum blood collection tube 1 has an upper end opening closed by a rubber cap 2 and the inside is evacuated. Then, the blood 3 collected in the vacuum blood collection tube 1 is sucked into an inspection device (not shown) via the biological sample suction needle 4. Therefore, the biological sample suction needle 4 is
It is made of a stainless steel pipe whose tip is cut obliquely and sharpened so that it can pierce the lid of the rubber cap 2 or the like.

[0003]

However, when the biological sample suction needle 4 is repeatedly used, the tip may be worn out and damaged in about 20,000 times during repeated use.
Even if the tip of the biological sample suction needle 4 is coated with titanium or the like, it is only about 50,000 times. Moreover, since the biological sample suction needle 4 is firmly fixed to a mounting table (not shown) for ensuring safety, it is difficult to remove the needle when replacing the needle. The present invention has been made in view of the above problems,
An object of the present invention is to provide a biological sample suction needle that can withstand long-term use.

[0004]

According to the present invention, in order to achieve the above object, a suction tube and a sharp end of the suction tube are fitted to a lower end opening of the suction tube and have excellent wear resistance. A biological sample aspirating needle which is configured to include a needle portion made of a material, penetrates a lid of the sample container, and aspirates a biological sample contained in the sample container. A suction port is bored in a portion where the portion is fitted, and a relief portion communicating the suction port and the internal space of the suction tube portion in a fitted state is provided in a fitting portion of the needle portion to the suction tube portion. It is formed. In addition, it is preferable that at least a part of a wall surface forming the relief portion of the fitting portion is formed of an inclined surface that is gradually inclined vertically downward toward the suction port. Further, it is preferable that the needle portion is made of ruby or sapphire.

[0005]

In the present invention, the needle portion is made of a material having excellent wear resistance. Therefore, even if the needle portion is repeatedly pierced through the lid of the sample container for aspirating the biological sample, the needle portion is hardly worn and used for a long time. You.

[0006]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a biological sample suction needle 11 according to the present invention.
And comprises a suction tube section 12 and a needle section 13. The suction pipe section 12 is made of a stainless steel pipe, and a blood suction port 14 is formed in the lower end side wall.

The needle portion 13 is made of a material having excellent wear resistance such as ruby, sapphire, cemented carbide, etc., and has a conical tip. However, this tip shape may be a quadrangular pyramid or the like as shown in FIG. The rear end of the needle 13 is
As shown in FIG. 3, a relief portion 15 is formed by cutting the outer peripheral surface along the axial direction, and the end surface is an inclined surface 16.

The needle portion 13 has a rear end fitted to the lower end opening 12a of the suction tube portion 12 and fixed by an epoxy-based adhesive or brazing. In this state, the blood suction port 14 of the suction pipe section 12 is open to a space formed between the relief section 15 of the needle section 13 and the inner peripheral surface of the suction pipe section 12.

The structure for fixing the needle portion 13 to the lower end opening 12a of the suction tube portion 12 may be as shown in FIG. 5 or FIG. That is, in the structure shown in FIG. 5, the through-hole 20 is formed opposite to the lower end side of the suction pipe section 12. On the other hand, a through hole 21 is formed at a position corresponding to the through hole 20 at the rear end of the needle portion 13.
Then, by inserting the pin 22 into both the through holes 20 and 21, the needle portion 13 is connected to the lower end opening 12 of the suction tube portion 12.
a.

In the structure shown in FIG. 6, an annular recess 23 is formed at the rear end of the needle portion 13. Then, the rear end of the needle 13 is connected to the lower end opening 12 of the suction tube 12.
a into the annular recess 23
By crimping, the needle portion 13 can be fixed to the suction tube portion 12. However, the gap formed in the outer peripheral portion of the lower end opening 12a by this caulking is filled with an adhesive or the like.

The biological sample suction needle 11 having the above structure is used for sucking blood in the vacuum blood collection tube 1 as in the conventional example. That is, the biological sample suction needle 11 is pierced through the rubber cap 2 of the vacuum blood collection tube 1, and sucks the blood inside the vacuum blood collection tube 2 through the blood suction port 14. The aspirated blood is discarded after the blood cell count and the like are measured by a test device (not shown). The biological sample suction needle 11 is washed with a washing liquid and prepared for the next vacuum blood collection tube 1.

As described above, the biological sample suction needle 11 is
Each time it penetrates the cap 2 of each vacuum blood collection tube 1, it receives a frictional force. However, since the needle portion 13 receiving this frictional force is made of a material having excellent abrasion resistance, it does not wear out for a long time. Can be used throughout.

In the biological sample suction needle 11, since the blood suction port 14 is located near the needle portion 13, FIG.
As shown in the figure, even when the amount of blood collected is very small, such as in a sick person or a newborn baby, it can sufficiently cope with such cases. Further, since the inclined surface 16 is formed in the fitting portion of the needle portion 13, there is no possibility that the sucked blood or the cleaning liquid is collected and contaminated.

In the above embodiment, the biological sample suction needle 1
1 is pierced through the cap 2 of the vacuum blood collection tube 1, but even if a sample container containing other biological sample such as urine is closed with the lid, the biological sample is similarly inserted. A sample suction needle 11 can be used.

[0015]

As is apparent from the above description, according to the biological sample suction needle according to the present invention, the needle body made of a material having excellent wear resistance penetrates the lid of the sample container. No need to replace or maintain, even if repeated over a long period. In addition, despite the configuration in which a separately provided needle portion is fitted to the lower end opening of the suction tube portion, the suction port can be provided close to the needle portion, so that when the sample is small, However, the suction can be performed reliably. In addition, since the inclined surface is formed in the needle portion, the sample does not remain in the needle, and there is no fear that the needle is contaminated by the sample. further,
Since the needle portion is made of ruby or sapphire, there is no fear of rusting even when used for a long period.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a biological sample suction needle according to the present embodiment.

FIG. 2 is a partial cross-sectional view of a biological sample suction needle according to another embodiment.

FIG. 3 is a front view of a vacuum blood collection tube and a biological sample suction needle.

FIG. 4 is a diagram illustrating a use state of the biological sample suction needle according to the present embodiment.

FIG. 5 is a sectional view showing another fixed state of the needle part shown in FIG. 1;

FIG. 6 is a sectional view showing another fixed state of the needle part shown in FIG. 1;

FIG. 7 is a front view of a biological sample suction needle and a vacuum blood collection tube according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vacuum blood collection tube (sample container), 2 ... Rubber cap (lid), 3 ... Blood, 11 ... Biological sample suction needle, 12 ... Suction tube part, 13 ... Needle part, 14 ... Blood suction port, 15 ... Relief Department.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tadami Matsuoka 2468 Wakakodama, Gyoda-shi, Saitama Ogura Jewelry Machinery Co., Ltd.Saitama Factory (72) Inventor Hiroshi Daimon 2468, Wakakodama, Gyoda-shi, Saitama Ogura Jewelry Machinery Co., Ltd. Inside the Saitama Factory Co., Ltd. (56) References JP-A-58-76765 (JP, A) Japanese Utility Model Application Hei 1-168868 (JP, U) Special Table Hei 4-500732 (JP, A)

Claims (3)

(57) [Scope of request for utility model registration] 1. A sample container lid comprising: a suction tube portion; and a needle portion formed of a material having excellent wear resistance and having a sharp end formed at a lower end opening of the suction tube portion. In a biological sample suction needle that penetrates a body and sucks a biological sample contained in the sample container, a suction port is formed in a portion of the lower end side wall of the suction tube portion where the needle portion is fitted. A biological sample suction needle, characterized in that a relief portion that connects the suction port and the internal space of the suction tube portion in a fitted state is formed in a fitting portion of the needle portion to the suction tube portion. 2. The fitting portion, wherein at least a part of a wall surface forming the relief portion is formed by an inclined surface which is gradually inclined vertically downward toward the suction port. 2. The biological sample suction needle according to 1. 3. The biological sample suction needle according to claim 1, wherein the needle part is made of ruby or sapphire.