CN110881986A - Vacuum test tube sampling structure - Google Patents

Abstract

The invention relates to a vacuum blood collection tube sampling structure, which comprises a seat body, a sampling needle, an inflation pipeline, a sampling pipeline and an air hole, wherein the sampling needle is arranged on the seat body and is used for puncturing a blood collection tube; the invention realizes the operation of automatically sampling from the vacuum blood sampling tube by inflating the blood sampling tube to generate pressure difference and reversely extruding the blood in the blood sampling tube out of the blood sampling tube by utilizing the pressure difference.

Description

A vacuum blood collection tube sampling structure

technical field

The invention relates to a vacuum blood collection tube sampling structure.

Background technique

Vacuum blood collection tubes are very commonly used in modern medical care. They are often used to collect human blood, and then perform a series of laboratory tests. In the actual detection process, blood samples from the blood collection tubes need to be taken many times. At present, artificial blood collection is used. way, which increases the risk of cross-contamination.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a vacuum blood collection tube sampling structure, which can realize the discharge of blood from the vacuum blood collection tube.

The technical scheme adopted in the present invention is: a vacuum blood collection tube sampling structure, which comprises a base body, a sampling needle arranged on the base body for puncturing the blood collection tube, an inflation pipeline arranged on the base body and communicated with the sampling needle, and The sampling pipeline connected with the inflation pipeline and the air hole for inflating the inflation pipeline and the sampling pipeline are provided with an inflation rubber valve between the air hole and the inflation pipeline, and a sampling rubber valve is arranged between the air hole and the sampling pipeline .

Further, one end of the sampling pipeline is provided with a sampling port.

Further, the inflation pipeline and the sampling pipeline are communicated with the gas supply pipeline, and the air hole is communicated with the gas supply pipeline.

Further, the sampling pipeline includes an end pipeline and a middle pipeline, and the sampling rubber valve is arranged on the pipeline between the air hole and the middle pipeline.

Further, the middle pipeline is in a continuous S shape.

Further, a blind hole for placing the blood collection tube is provided on the upper end surface of the base body, and the sampling needle is provided at the bottom of the blind hole.

Further, a rubber air inlet is provided on the air hole.

The positive effects of the present invention are as follows: the present invention communicates the inflation pipeline with a valve, the sampling pipeline and the sampling needle, and sets the inflatable hole to inflate the blood sampling tube, firstly closes the sampling rubber valve of the sampling pipeline, and opens the inflatable rubber. The valve is inflated into the blood collection tube through the air hole, so that the pressure in the blood collection tube increases. After a period of inflation, the inflation is stopped, and then the sampling rubber valve and the inflation rubber valve are opened at the same time, and the blood in the blood collection tube flows back to the inflation pipeline and sampling tube under the action of pressure. Then close the inflatable rubber valve and open the sampling rubber valve, inflate through the air hole again, and the blood will be blown out through the sampling port along the sampling pipeline. The pressure difference is generated by inflating the blood collection tube, and the blood in the blood collection tube is reversely pressed out of the blood collection tube by the pressure difference, so as to realize the operation of sampling from the vacuum blood collection tube, and automatic blood collection is realized through the equipment, which reduces the manual operation and effectively prevents cross infection. .

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of sampling pipeline of the present invention;

FIG. 3 is a schematic diagram of the blind via structure of the present invention.

Detailed ways

As shown in Figures 1-3, the present invention includes a base body 1, a blind hole 10 at the top of the base body 1 for placing a vacuum blood collection tube, a sampling needle 9 is arranged in the blind hole 10, and the blood collection tube is inserted upside down in the blind hole In 10, the sampling needle 9 pierces the blood collection tube and enters into its interior.

The seat body 1 is provided with an inflation pipeline 8 that communicates with the sampling needle 9 and a sampling pipeline that communicates with the inflation pipeline 8 through the air supply pipeline 11. The air supply pipeline 11 is connected with an air hole 3, and the air hole 3 communicates with the air pump to the When the gas is injected into the pipeline, the air pump should ensure that there is always a certain pressure at the air hole 3 to prevent the blood from flowing into the air pump when it flows back. The two ends of the air supply pipeline 11 are respectively connected with the inflation pipeline 8 and the sampling pipeline, and an inflatable rubber valve 5 is arranged on the pipeline connecting the air hole 3 and the inflation pipeline 8, and the pipeline connecting the air hole 3 and the sampling pipeline is provided. Sampling rubber valve 4.

In order to improve the airtightness of the air hole 3, a rubber air inlet is provided on the air hole 3, and the airtightness is better when it is connected with the air pump.

The sampling pipeline includes a continuous S-shaped middle pipeline 6 and an end pipeline 7 connected with the middle pipeline 6 at one end. mouth 2.

When the present invention is used, first, the blood collection tube is inserted upside down into the blind hole 10, and the sampling needle 9 is inserted into the blood collection tube. Open the inflation rubber valve 5, close the sampling rubber valve 4, and use the air pump to inflate the air hole 3. At this time, the air hole 3, the air supply line 11, and the inflation line 8 are connected, and the blood collection tube is inflated through the sampling needle 9, so that the blood collection tube 9 is inflated. The pressure inside is greater than the pressure outside to form a pressure difference. Then stop the inflation and open the sampling rubber valve 4. At this time, the air supply pipeline 11, the inflation pipeline 8 and the sampling pipeline form a passage, and the inside of the blood collection tube is connected to the external atmosphere. Under the action of pressure, the blood in the blood collection tube flows into the sampling needle 9. To the inflation line 8, the air supply line 11 and the sampling line. A liquid level detection port is provided at the lower end of the middle pipeline 6, and a sensor is corresponding to the liquid level detection port. When the blood reaches the liquid level detection port, the inflation rubber valve 5 is closed, and the sampling rubber valve 4 is opened, and the air pump is opened again to the air hole. 3 is inflated. At this time, the air hole 3, the air supply pipeline 11 and the sampling pipeline form a passage, and the blood in the air supply pipeline 11 and the sampling pipeline will be discharged from the sampling port 2, and the sampling of the vacuum blood collection tube is completed.

The invention utilizes the pressure difference to discharge blood from the blood collection tube, and by controlling the pressure charged into the blood collection tube, the sampling amount can be controlled within a certain range, and automatic blood collection can be realized.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments. Modifications are made to the technical solutions of the present invention, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A vacuum blood collection tube sampling structure, characterized in that it comprises a seat body (1), a sampling needle (9) arranged on the seat body (1) for puncturing the blood collection tube, a sampling needle (9) arranged on the seat body (1) and a sampling needle (9). The inflation line (8) communicated with the needle (9), the sampling line communicated with the inflation line (8), and the air hole (3) for inflating the inflation line (8) and the sampling line, in the air hole (3) ) and the inflation pipeline (8) are provided with an inflation rubber valve (5), and a sampling rubber valve (4) is arranged between the air hole (3) and the sampling pipeline. 2 . The vacuum blood collection tube sampling structure according to claim 1 , wherein a sampling port ( 2 ) is provided at one end of the sampling pipeline. 3 . 3. A vacuum blood collection tube sampling structure according to claim 1, characterized in that the inflation pipeline (8) and the sampling pipeline are communicated with the gas supply pipeline (11), and the air hole (3) is connected to the gas supply pipeline Road (11) is connected. 4. A vacuum blood collection tube sampling structure according to claim 1, characterized in that the sampling pipeline comprises an end pipeline (7) and a middle pipeline (6), and the sampling rubber valve (4) is provided at the On the pipeline between the air hole (3) and the middle pipeline (6). 5 . The vacuum blood collection tube sampling structure according to claim 4 , wherein the middle pipeline ( 6 ) is in a continuous S shape. 6 . 6. A vacuum blood collection tube sampling structure according to claim 1, characterized in that a blind hole (10) for placing blood collection tubes is provided on the upper end surface of the base body (1), and the sampling needle (9) ) at the bottom of the blind hole (10). 7. A vacuum blood collection tube sampling structure according to claim 1, characterized in that a rubber air inlet is provided on the air hole (3).

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