JPH0628737U - Biological sample suction needle - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a biological sample suction needle that can withstand long-term use. [Structure] The biological sample suction needle 11 is composed of a suction tube portion 12 having a blood suction port 14 on a lower end side wall, and a needle portion 13 made of a material having excellent wear resistance such as sapphire. The biological sample suction needle 11 is pierced through the lid body 2 of the vacuum blood collection tube 1 and sucks the blood 3 collected therein. The needle portion 13 is pierced through the lid bodies 2 of the plurality of vacuum blood collection tubes 1 for suction, but is hard to wear and is used for a long period of time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a biological sample suction needle for sucking a biological sample such as blood or urine contained in a sample container.

[0002]

[Prior art]

 Conventionally, as a sample container in which a biological sample such as blood or urine is stored, there is, for example, a vacuum blood collection tube shown in FIG. This vacuum blood collection tube 1 has its 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 the inspection device (not shown) via the biological sample suction needle 4. For this reason, the biological sample suction needle 4 is made of a stainless steel pipe having a sharply cut tip so that it can be pierced into the lid such as the rubber cap 2 or the like.

[0003]

[Problems to be solved by the device]

 However, the tip of the biological sample suction needle 4 may be worn and damaged about 20,000 times during repeated use. Even if the tip portion 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 base (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, and an object thereof is to provide a biological sample suction needle that can withstand long-term use.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a biological sample suction needle that penetrates a lid of a sample container and sucks a biological sample contained in the sample container. Section and a lower end opening of the suction tube section, which has a relief section that communicates the suction port with the inside of the suction tube section, and is made of a material with excellent wear resistance such as sapphire, and the tip is It is composed of a sharply formed needle portion.

[0005]

[Action]

 In the present invention, since the needle portion is made of a material having excellent wear resistance, even if it is repeatedly pierced by the lid of the sample container for aspiration of the biological sample, it is hard to wear and is used for a long time.

[0006]

【Example】

 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, which comprises a suction tube portion 12 and a needle portion 13. The suction pipe portion 12 is made of a stainless steel pipe, and a blood suction port 14 is formed in the side wall of the lower end portion thereof.

The needle portion 13 is made of a material having excellent wear resistance such as ruby, sapphire, or cemented carbide, and has a conical tip. However, this tip shape may be a quadrangular pyramid or the like as shown in FIG. Further, as shown in FIG. 3, the rear end portion of the needle portion 13 has a relief portion 15 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 portion fitted into the lower end opening portion 12 a of the suction pipe portion 12 and fixed by an epoxy adhesive or brazing. In this state, the blood suction port 14 of the suction pipe portion 12 is open to the space formed between the relief portion 15 of the needle portion 13 and the inner peripheral surface of the suction pipe portion 12.

The structure for fixing the needle portion 13 to the lower end opening 12 a of the suction tube portion 12 may be that shown in FIG. 5 or 6. That is, in the structure shown in FIG. 5, a through hole 20 is formed on the lower end side of the suction tube portion 12 so as to face each other. 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, the needle portion 13 can be fixed to the lower end opening portion 12a of the suction pipe portion 12 by press-fitting the pin 22 into both the through holes 20 and 21.

Further, in the structure shown in FIG. 6, an annular recess 23 is formed at the rear end of the needle portion 13. Then, after inserting the rear end portion of the needle portion 13 into the lower end opening portion 12a of the suction pipe portion 12, by caulking the lower end opening portion 12a into the annular recess 23, the needle portion 13 is sucked into the suction pipe portion 12. It can be fixed to. However, an adhesive or the like is filled in the gap formed in the outer peripheral portion of the lower end opening 12a by this caulking.

The biological sample suction needle 11 having the above-described configuration is used for suctioning blood in the vacuum blood collection tube 1 as in the conventional example. That is, the biological sample suction needle 11 is penetrated into 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 an inspection device (not shown). The biological sample suction needle 11 is washed with a washing liquid and is prepared for the next vacuum blood collection tube 1.

As described above, the biological sample suction needle 11 receives a frictional force each time it is inserted into the cap 2 of each vacuum blood collection tube 1, and the needle portion 13 that receives this frictional force has excellent wear resistance. Since it is made of a material that does not wear, it can be used for a long time.

Further, in the biological sample suction needle 11, since the blood suction port 14 is located in the vicinity of the needle portion 13, as shown in FIG. 4, when the blood sampling amount is very small, such as a sick person or a newborn baby. However, it can be sufficiently dealt with. Further, since the inclined surface 16 is formed at the fitting portion of the needle portion 13, there is no fear that the sucked blood or the cleaning liquid is accumulated and contaminated.

In the above embodiment, the case where the biological sample suction needle 11 is pushed through the cap 2 of the vacuum blood collection tube 1 has been described, but it is a sample container in which another biological sample such as urine is stored. The biological sample suction needle 11 can be used in the same manner as long as it is closed with the lid.

[0015]

[Effect of device]

 As is clear from the above description, according to the biological sample suction needle of the present invention, the needle portion made of a material having excellent wear resistance is used to pierce the lid of the sample container. No need to replace or maintain after repeated use.

[Brief description of drawings]

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

5 is a cross-sectional view showing another fixed state of the needle portion shown in FIG.

FIG. 6 is a cross-sectional view showing another fixed state of the needle portion shown in FIG.

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 ... Escape Department.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadami Matsuoka 2468 Wakakodama, Gyoda-shi, Saitama Ogura Gem Seiki Co., Ltd. Saitama factory (72) Inventor Hiroshi Daimon 2468 Wakakodama, Gyoda, Saitama Ogura Gem Seiki Co., Ltd. Saitama factory

Claims (1)

[Scope of utility model registration request] 1. A biological sample suction needle that penetrates a lid of a sample container and sucks a biological sample contained in the sample container; a suction tube part having a suction port on a lower end side wall;
Fitted in the opening at the lower end of the suction pipe portion, has a relief portion that communicates the suction port with the inside of the suction pipe portion, and is made of a material with excellent wear resistance such as sapphire, and the tip is sharply formed. A biological sample suction needle.