CN102788716B - Suction-free middle-layer straight dual-channel test tube - Google Patents

Abstract

The invention relates to the technical field of vacuum blood collection, in particular to a suction-free middle-layer direct-taking double-channel test tube. It consists of a splash cap, a rubber plug, a switch lever, a catheter plug, a catheter and a catheter sleeve. The switch rod is a T-shaped plastic rod, the upper end of the switch rod is in the rubber plug and bonded as a whole with the rubber plug, and the lower end of the switch rod is in the conduit plug made of butyl rubber. Inside the tube body there is a tube fused with the bottom of the tube body, the lower port of the tube protrudes from the bottom of the tube body, the tube plug is inserted into the upper port of the tube, and the tube plug forms an interference fit with the tube relation. Since the invention can directly sample from the central position of the pure serum, the interference of the fibrin impurity layer on the purity of the serum is avoided, and the accuracy of the detection result of the blood sample is improved.

Description

Suction-free middle layer direct extraction double-channel test tube

technical field

The invention relates to the technical field of vacuum blood collection, in particular to a suction-free middle-layer direct-taking double-channel test tube.

Background technique

Existing separation gel test tubes are all straight tubes with open upper ends and closed lower ends. After the blood is centrifuged, there will be a layer of impurities floating on the surface of the serum. Because the impurities float on the surface of the serum, when the sampling needle extends downward from the nozzle to the serum to absorb the serum, once the needle passes through the floating layer of impurities, it will often be blocked, even if the sampling needle is partially blocked, it will also cause The blood sample test results were inaccurate. This part of impurities is mainly composed of fibrin filaments in the blood, oils and small molecular colloids in the separating gel. Due to the variety of chemical and physical properties of the impurities, it is very difficult to remove them quickly and completely.

Contents of the invention

In order to solve the deficiencies of the prior art, the present invention provides a medical worker who can completely avoid the contact of the sampling needle with the impurities in the process of extracting the serum without removing the impurities on the surface of the serum, so as to ensure the purity of the extracted serum and prevent the needle from being damaged. Plugged non-suction mid-layer direct access dual-channel test tube.

The scheme that solves technical problem of the present invention is:

The non-suction middle layer direct access double-channel test tube is composed of a splash cap, a rubber stopper, a switch rod, a catheter plug, a catheter and a catheter sleeve. The tube body is a cylindrical glass tube with a closed lower end, a rubber plug is plugged in the upper port of the tube body, and the splash-proof cap is set on the rubber plug. The switch rod is a T-shaped plastic rod. The upper end of the switch rod is in the rubber plug and bonded with the rubber plug as a whole. The lower end of the switch rod is in the butyl rubber conduit plug and glued to the conduit plug. connected as a whole. The material of the catheter plug is butyl rubber. The catheter plug is divided into upper and lower parts in shape. The upper part is an inverted frustum with a large upper part and a smaller lower part, and the lower part is an inverted cone with the tip facing down. Inside the pipe body, there is a conduit coaxial with the pipe body and fused with the bottom of the pipe body. The upper port of the conduit is in the upper half of the pipe body, and the lower port of the conduit protrudes from the bottom of the pipe body. , The catheter sleeve made of butyl rubber is set on the lower port of the catheter. The conduit plug is inserted into the upper port of the conduit, and the conduit plug forms an interference fit relationship with the conduit. The vertical length of the catheter plug inserted into the upper port of the catheter is greater than the vertical length of the rubber plug inserted into the upper port of the pipe body.

After the laboratory technician separates the invention with the blood sample through the centrifuge, the liquid in the tube body is an impurity layer, serum, separation gel, and blood cells from top to bottom in sequence, and the upper port of the catheter is located below the impurity layer and in the serum. At this time, the laboratory technician only needs to take off the catheter cover first, and then pull out the rubber plug together with the splash-proof cap, and the switch lever will pull the catheter plug out of the upper port of the catheter. Open, the serum in the tube enters the upper port of the catheter under the action of gravity and flows out directly from the lower port of the catheter. mouth, the blood flow stopped immediately.

Adopt above-mentioned scheme, compared with prior art, the present invention has following remarkable progress:

1. Since the present invention can directly sample from the central position of pure serum, it avoids the interference of the fibrin impurity layer on the serum surface during the process of the traditional sampling needle extending into the serum from above, and improves the accuracy of blood sample detection results sex.

2. Since the present invention constitutes a self-flowing switch system for serum sampling through a catheter, a switch rod and a catheter plug, the traditional syringe and the sampling process for serum suction are omitted, which not only saves medical equipment, but also makes the serum sampling process more efficient. It is more convenient and improves the work efficiency of serum testing.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

In the figure: 1. Anti-splash cap 2. Rubber plug 3. Switch rod 4. Catheter plug 5. Catheter 6. Catheter sleeve 7. Tube body 8. Serum 9. Separating gel 10. Blood cells 11. Impurity layer

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The non-suction middle-level direct access double-channel test tube is composed of a splash cap 1, a rubber plug 2, a switch rod 3, a catheter plug 4, a catheter 5 and a catheter sleeve 6. The tube body 7 is a cylindrical glass tube with a closed lower end. A rubber plug 2 is plugged in the upper port of the tube body 7 , and the splash-proof cap 1 is set on the rubber plug 2 . The switch rod 3 is a T-shaped plastic rod. The upper end of the switch rod 3 is in the rubber plug 2 and bonded with the rubber plug 2 as a whole. The lower end of the switch rod 3 is in the conduit plug 4 made of butyl rubber. , and bonded with the catheter plug 4 as a whole. The material of conduit plug 4 is butyl rubber, and conduit plug 4 is divided into upper and lower two parts physically, and the upper part is the rounded truncated cone shape with big upper part and lower part, and the lower part is an inverted cone with the tip facing down. Inside the tube body 7 there is a conduit 5 coaxial with the tube body 7 and fused together with the bottom of the tube body 7. The upper port of the conduit 5 is in the upper half of the tube body 7, and the lower port of the conduit 5 Protruding from the bottom of the pipe body 7 , the catheter sleeve 6 made of butyl rubber is sleeved on the lower port of the catheter 5 . The conduit plug 4 is inserted into the upper port of the conduit 5 , and the conduit plug 4 and the conduit 5 form an interference fit relationship. The vertical length of the conduit plug 4 inserted into the upper port of the conduit 5 is greater than the vertical length of the rubber plug 2 inserted into the upper port of the tube body 7 .

After the laboratory technician separates the present invention containing the blood sample through the centrifuge, the liquid in the tube body 7 is the impurity layer 11, the serum 8, the separation gel 9, and the blood cells 10 from top to bottom, and the upper port of the catheter 5 is located in the impurity layer. 11 below and in serum 8. At this time, the laboratory technician only needs to remove the catheter cover 6 first, and then pull out the rubber plug 2 together with the splash-proof cap 1, and the switch lever 3 will pull the catheter plug 4 out from the upper port of the catheter 5. The upper opening of the body 7 is completely open, and the serum 8 in the tube body 7 enters the upper port of the conduit 5 under the action of gravity and directly flows out from the lower port of the conduit 5, until the impurity layer 11 drops to close to the conduit with the liquid level of the serum 8 When the upper opening of the catheter 5 is inserted, the catheter plug 4 is inserted into the upper opening of the catheter 5 again, and the serum 8 stops flowing out at once.

Claims (1)

1. A suction-free middle-layer direct-taking double-channel test tube is composed of a splash-proof cap, a rubber plug, a switch rod, a catheter plug, a catheter and a catheter sleeve, and is characterized in that: the tube body is cylindrical and the lower end is closed The upper port of the tube body is filled with a rubber plug, the splash-proof cap is set on the rubber plug, the switch rod is a T-shaped plastic rod, and the upper end of the switch rod is in the rubber plug and connected to the rubber plug. Bonded as a whole, the lower end of the switch rod is in the butyl rubber conduit plug, and bonded with the conduit plug as a whole, the conduit plug is made of butyl rubber, and the conduit plug is divided into upper and lower parts in shape, The upper part is a rounded frustum with a large top and a small bottom, and the lower part is an inverted cone with the tip facing down. Inside the tube body, there is a tube that is coaxial with the tube body and fused with the bottom of the tube body. The upper port is located in the upper half of the pipe body, the lower port of the catheter protrudes from the bottom of the pipe body, the catheter sleeve made of butyl rubber is sleeved on the lower port of the catheter, the catheter plug is inserted into the upper port of the catheter, and the catheter The plug and the catheter form an interference fit relationship, and the vertical length of the catheter plug inserted into the upper port of the catheter is greater than the vertical length of the rubber plug inserted into the upper port of the pipe body.