Plastic suction tube for separating serum in blood

Abstract

The utility model provides a plastic suction tube for separating serum in blood, which relates to the technical field of serum separation plastic suction tubes and comprises a plastic suction tube body, a suction head arranged at the top of the plastic suction tube body and a test tube arranged at the bottom of the plastic suction tube body. According to the plastic suction pipe for separating the serum in the blood, negative pressure suction force is generated in the plastic suction pipe body through the adsorption assembly, the serum on the upper layer of the blood can be sucked into the plastic suction pipe body and collected into the suction head, and pull-out type adsorption is easy to control; serum entering the plastic suction tube body is prevented from flowing back into a test tube to be mixed with blood, the workload of serum separation is further reduced, the plastic suction tube body can be fixed in the test tube through the fixing assembly, the plastic suction tube body does not need to be stabilized through manual force control, and the labor intensity is reduced. The situation that the plastic suction tube body is inserted into a blood middle layer to suck white blood cells and blood platelets by mistake due to unstable control force is prevented, and waste of blood samples is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipettes for serum separation, and specifically relates to a plastic pipette for separating serum from blood. Background Art

[0002] Serum separation from blood is a laboratory procedure used to separate serum from whole blood samples for various chemical and biological tests. Serum is the liquid part of blood, which has removed fibrinogen and cellular components and contains various proteins, antibodies, hormones, and other biomolecules. After blood collection, it is placed in a test tube and the test tube is put into a centrifuge for centrifugation. The purpose of centrifugation is to separate the cellular components in blood (such as red blood cells, white blood cells, and platelets) from plasma (the liquid part containing serum). After centrifugation, the blood sample will form several layers: the upper layer is serum, the middle layer is the layer of white blood cells and platelets, and the bottom layer is red blood cells. At this time, a plastic pipette is inserted into the test tube to contact the serum in the upper layer of the blood, and the serum is sucked out through the plastic pipette to be separated from the blood.

[0003] However, in the actual use process of the existing plastic pipettes, there are still certain defects. The existing plastic pipettes are composed of a nozzle and a tip. After the nozzle contacts the serum in the upper layer of the blood, the tip is pressed by hand to generate negative pressure suction to suck the serum into the nozzle and discharge it into the tip through the pipeline. However, this hand-pressed adsorption is not easy to control, resulting in the serum inhaled into the pipeline being easily refluxed into the test tube to mix with the blood, increasing the workload of separating serum. Moreover, after the plastic pipette is inserted into the test tube, it is necessary to manually hold and control the force to stabilize the plastic pipette to suck the serum inside the test tube multiple times to separate the serum completely. However, unstable control force will cause the plastic pipette to be inserted into the middle layer, thereby causing accidental aspiration of white blood cells and platelets in the middle layer, resulting in waste of blood samples. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is: to provide a plastic pipette for separating serum from blood, which solves the problems that the hand-pressed adsorption of the existing plastic pipette is not easy to control, resulting in the serum inhaled into the pipeline being easily refluxed into the test tube to mix with the blood, and unstable control force will cause the plastic pipette to be inserted into the middle layer, thereby causing accidental aspiration of white blood cells and platelets in the middle layer, resulting in waste of blood samples.

[0005] The technical problem to be solved by the utility model is solved by adopting the following technical solutions:

[0006] A plastic straw for separating serum in blood, comprising: a plastic straw body, a suction head provided at the top of the plastic straw body, a test tube provided at the bottom of the plastic straw body, an adsorption component provided inside the suction head for sucking out the serum in the blood inside the test tube, and a fixing component provided at the top of the test tube for fixedly placing the plastic straw body.

[0007] Further, the adsorption component includes: an adsorption cavity opened inside the suction head, a piston head provided inside the adsorption cavity, a through hole opened at the top of the suction head and communicating with the adsorption cavity, a draw rod provided inside the through hole and connected to the piston head, and a pull block installed at the top end of the draw rod.

[0008] Further, the fixing component includes: a circular fixing head fixedly inserted at the top of the test tube, a limit hole opened in the middle of the circular fixing head, clamping blocks provided on both sides inside the limit hole, movable draw rods connected to the outer ends of the two clamping blocks, a pressing plate installed on the movable draw rods, a spring sleeved on the movable draw rods and connected to the pressing plate, and a pull ring installed at the outer end of the movable draw rod.

[0009] Further, a discharge pipe communicating with the adsorption cavity is installed at the bottom of the outer end of the suction head, a delivery hose is connected to the outside of the discharge pipe, and the other end of the delivery hose is connected to a storage bottle.

[0010] Further, a connector a is provided on the outside of the discharge pipe, a jack communicating with the discharge pipe is opened inside the connector a, a connector b is installed at one end of the delivery hose, and a connecting pipe matching the jack is installed at one end of the connector b.

[0011] Further, the side of the clamping block facing the plastic straw body is arranged in an arc structure, and the clamping block is made of rubber material.

[0012] Further, limit cavities are respectively opened on both sides inside the circular fixing head, and the pressing plate and the spring are located inside the limit cavities. Activity holes are opened between the limit cavities, the limit holes and the outer wall of the circular fixing head, and the movable draw rod passes through the activity holes and the limit cavities and extends to the outside of the circular fixing head.

[0013] The beneficial effects of the present utility model are:

[0014] (1) By means of the adsorption component of the present utility model, negative pressure suction is generated inside the plastic straw body, so that the serum on the upper layer of the blood can be sucked into the plastic straw body and collected inside the suction head. This kind of pull-type adsorption is easy to control, making the suction inside the suction head and the plastic straw body relatively stable, avoiding the reflux of the serum entering the plastic straw body into the test tube and mixing with the blood, thereby reducing the workload of separating the serum.

[0015] (2) The plastic straw body can be fixed inside the test tube through the fixing component of the present utility model, eliminating the need for manual control to hold the plastic straw body steady, preventing unstable control force from causing the plastic straw body to insert into the middle layer of the blood and accidentally aspirate white blood cells and platelets, and avoiding waste of blood samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0017] Figure 2 It is a schematic diagram of the overall cross-section of the present utility model.

[0018] Figure 3 It is a schematic diagram of the split structure of the discharge pipe and the delivery hose of the present utility model.

[0019] Figure 4 For the present utility model Figure 2 The enlarged schematic diagram at position A.

[0020] Figure 5 It is a schematic diagram of the circular fixing head structure of the present utility model.

[0021] Figure 6 It is a schematic diagram of the top view cross-section of the circular fixing head of the present utility model.

[0022] Figure 7 It is a schematic diagram of the top view cross-section of the clamping block of the present utility model.

[0023] Figures 1 - 7 In the figure: 1. Plastic straw body; 101. Tip; 102. Adsorption cavity; 103. Piston head; 104. Through hole; 105. Pull rod; 106. Pull block; 2. Test tube; 3. Discharge pipe; 301. Delivery hose; 302. Storage bottle; 303. Connector a; 304. Jack; 305. Connector b; 306. Connecting pipe; 4. Circular fixing head; 401. Limit hole; 402. Clamping block; 403. Movable pull rod; 404. Pressure plate; 405. Spring; 406. Pull ring; 407. Limit cavity; 408. Movable hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0025] The present application will be described in detail below in conjunction with the drawings and specific embodiments.

[0026] Example 1

[0027] As Figures 1 - 7 shown, a plastic straw for separating serum in blood includes: a plastic straw body 1, a tip 101 provided at the top of the plastic straw body 1, a test tube 2 provided at the bottom of the plastic straw body 1, an adsorption component provided inside the tip 101 for sucking out the serum in the blood inside the test tube 2, and a fixing component provided at the top of the test tube 2 for fixedly placing the plastic straw body 1.

[0028] Among them, referring to Figure 1 、 Figure 2 and Figure 5 , the adsorption component includes: an adsorption cavity 102 opened inside the tip 101, a piston head 103 provided inside the adsorption cavity 102, a through hole 104 opened at the top of the tip 101 and communicating with the adsorption cavity 102, a draw rod 105 provided inside the through hole 104 and connected to the piston head 103, and a pull block 106 installed at the top end of the draw rod 105.

[0029] When collecting blood, the collected blood is stored in the test tube 2, and then the test tube 2 is placed in a centrifuge for centrifugation. Due to the density difference of different components in the blood, after blood centrifugation, obvious stratification will form in the test tube 2, mainly the upper-layer serum, the middle-layer white blood cells and platelets, and the bottom-layer red blood cells. At this time, the plastic straw body 1 is inserted into the test tube 2 to contact the upper-layer serum of the blood, and the pull block 106 is grasped to pull the draw rod 105 to move in the through hole 104, driving the piston head 103 to move upward in the adsorption cavity 102. Since the piston head 103 is in close fit with the inner wall of the adsorption cavity 102, when the piston head 103 is pulled upward, negative pressure suction is generated inside the plastic straw body 1, and the upper-layer serum of the blood can be sucked into the plastic straw body 1 and collected inside the tip 101. This kind of pull-type adsorption is easy to control, making the suction inside the tip 101 and the plastic straw body 1 relatively stable, avoiding the reflux of the serum entering the plastic straw body 1 into the test tube 2 and mixing with the blood, thereby reducing the workload of separating serum.

[0030] Among them, referring to Figures 1 - 2 , a discharge pipe 3 communicating with the adsorption cavity 102 is installed at the bottom of the outer end of the tip 101, a delivery hose 301 is connected to the outside of the discharge pipe 3, and the other end of the delivery hose 301 is connected to a storage bottle 302.

[0031] When the serum on the upper layer of the blood is sucked into the plastic straw body 1 and collected inside the tip 101, the serum is located in the adsorption cavity 102, that is, the serum can be discharged from the discharge pipe 3 to the delivery hose 301 and flow into the storage bottle 302 through the delivery hose 301, which is convenient for discharging and collecting the serum inside the tip 101. When the amount of serum on the upper layer of the blood gradually decreases until the separation is completed, the pulling block 106 can be stopped from being pulled to avoid accidentally sucking the blood of other layers. After the serum is adsorbed and separated into the tip 101, it can be discharged and collected in time. There is no need to suck the serum once, pull the plastic straw body 1 out of the test tube 2, empty the serum in the tip 101, and then insert it into the test tube 2 again to continue sucking the serum until the serum is completely sucked and separated.

[0032] Among them, referring to Figure 3 , a connector a303 is provided on the outside of the discharge pipe 3, and a jack 304 communicating with the discharge pipe 3 is opened inside the connector a303. One end of the delivery hose 301 is equipped with a connector b305, and one end of the connector b305 is equipped with a connecting pipe 306 that is used in cooperation with the jack 304.

[0033] When the delivery hose 301 is in use, the connecting pipe 306 at one end of the connector b305 is inserted into the jack 304 inside the connector a303, so that the connector b305 and the connector a303 are closely fixed together, and the other end of the delivery hose 301 is inserted into the storage bottle 302. When the serum is inhaled into the adsorption cavity 102, the serum is discharged from the discharge pipe 3, the connector b305 and the connector a303 into the delivery hose 301 and flows into the storage bottle 302 through the delivery hose 301 for collection.

[0034] After the serum is separated, the connecting pipe 306 at one end of the connector b305 is pulled out of the jack 304, so that the delivery hose 301 is disassembled from the discharge pipe 3, which is convenient for pulling the plastic straw body 1 out of the test tube 2.

[0035] Embodiment 2

[0036] On the basis of Embodiment 1, referring to Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , the fixing component includes: a circular fixing head 4 fixedly inserted into the top of the test tube 2, a limiting hole 401 is opened in the middle of the circular fixing head 4, clamping blocks 402 are arranged on both sides inside the limiting hole 401, movable pull rods 403 are connected to the outer ends of the two clamping blocks 402, a pressing plate 404 is installed on the movable pull rods 403, a spring 405 sleeved on the movable pull rods 403 and connected to the pressing plate 404, and a pull ring 406 is installed at the outer end of the movable pull rod 403.

[0037] When inserting the plastic straw body 1 into the test tube 2, first plug the circular fixed head 4 into the top of the test tube 2, that is, the plastic straw body 1 passes through the limiting hole 401 in the middle of the circular fixed head 4 and is inserted into the test tube 2. When the plastic straw body 1 is inserted, grasp the pull ring 406 to pull the movable pull rod 403 outward, so that the pressure plate 404 on the movable pull rod 403 squeezes the spring 405, and then drives the two clamping blocks 402 to be pulled apart from the middle of the limiting hole 401 to both sides. After the plastic straw body 1 is inserted into the test tube 2 and contacts the serum on the upper layer of the blood, since the test tube 2 is transparent and the blood has obvious stratification characteristics after centrifugation, that is The plastic straw body 1 is inserted into the boundary between the serum layer and the white blood cell and platelet layer. At this time, the pull ring 406 is loosened to remove the force from the pressure plate 404 on the movable pull rod 403. The spring 405 recovers its deformation and generates a rebound force to push the pressure plate 404 and the movable pull rod 403 back to their original positions. The outer side of the plastic straw body 1 is clamped by two clamping blocks 402 and placed in the circular fixing head 4, so that the plastic straw body 1 can be fixed inside the test tube 2. There is no need to manually control the force to stabilize the plastic straw body 1, so as to prevent the plastic straw body 1 from being inserted into the middle layer and accidentally sucking in white blood cells and platelets due to unstable control force, thereby avoiding waste of blood samples.

[0038] Since the plastic straw body 1 is inserted into the boundary between the serum layer and the white blood cell and platelet layer for positioning and fixing, the serum in the blood can be separated at one time after extraction and adsorption, thereby improving the working efficiency of serum separation.

[0039] Among them, reference Figures 6 - 7 The clamping block 402 is arranged in an arc-shaped structure on one side facing the plastic straw body 1, and the clamping block 402 is made of rubber material.

[0040] When the two clamping blocks 402 clamp the two sides of the outer end of the plastic straw body 1, since the clamping blocks 402 are arranged in an arc-shaped structure on the side facing the plastic straw body 1, the clamping blocks 402 can be completely fitted with the outer wall of the plastic straw body 1 to prevent the clamping blocks 402 from loosening. The clamping blocks 402 are made of rubber material, which makes the clamping blocks 402 have excellent anti-slip properties, which can avoid damage to the plastic straw body 1 and increase the stability of the clamping blocks 402 on the plastic straw body 1.

[0041] Among them, reference Figure 2 and Figure 4 A limiting cavity 407 is respectively provided on both sides of the circular fixed head 4, and the pressure plate 404 and the spring 405 are located inside the limiting cavity 407. A movable hole 408 is provided on the limiting cavity 407, the limiting hole 401 and the outer wall of the circular fixed head 4, and the movable pull rod 403 passes through the movable hole 408 and the limiting cavity 407 and extends to the outside of the circular fixed head 4.

[0042] When the pull ring 406 is grasped and the movable pull rod 403 is pulled outwards, since the pressing plate 404 and the spring 405 are located inside the limiting cavity 407, the movable pull rod 403 can be flexibly pulled and used in the movable hole 408 and the limiting cavity 407. After the movable pull rod 403 is subjected to a pulling force, it drives the pressing plate 404 to tightly press the spring 405 to contact and fit with the inner wall of the limiting cavity 407, limiting the pressing plate 404 and the spring 405, and thus it can be realized to pull the two clamping blocks 402 apart from the middle of the limiting hole 401 to both sides.

[0043] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0044] The above has introduced in detail a plastic straw for separating serum in blood provided by the embodiments of the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application. Those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A plastic straw for separating serum from blood, characterized in that: include: Plastic straw body (1); A suction head (101) disposed on the top of the plastic straw body (1); A test tube (2) disposed at the bottom of the plastic straw body (1); An adsorption component disposed inside the suction head (101) and used to absorb serum from the blood inside the test tube (2); A fixing component disposed on the top of the test tube (2) and used for fixing and placing the plastic straw body (1); The adsorption assembly comprises: An adsorption chamber (102) is provided inside the suction head (101); A piston head (103) disposed inside the adsorption chamber (102); A through hole (104) is provided at the top of the suction head (101) and communicates with the adsorption chamber (102); A pull rod (105) is arranged inside the through hole (104) and connected to the piston head (103), and a pull block (106) is installed at the top end of the pull rod (105); A discharge pipe (3) communicating with the adsorption chamber (102) is installed at the bottom of the outer end of the suction head (101), a delivery hose (301) is connected to the outer side of the discharge pipe (3), and the other end of the delivery hose (301) is connected to a storage bottle (302); The fixing assembly comprises: A circular fixing head (4) fixedly plugged into the top of the test tube (2), wherein a limiting hole (401) is provided in the middle of the circular fixing head (4); Clamping blocks (402) are arranged on both sides of the limiting hole (401), and the outer ends of the two clamping blocks (402) are connected to movable pull rods (403); A pressing plate (404) mounted on the movable pull rod (403); a spring (405) sleeved on the movable pull rod (403) and connected to the pressure plate (404); a pull ring (406) is installed on the outer end of the movable pull rod (403); The clamping block (402) is arranged in an arc-shaped structure on one side facing the plastic straw body (1), and the clamping block (402) is made of rubber material; The circular fixed head (4) has limit cavities (407) on both sides thereof, and the pressure plate (404) and the spring (405) are located inside the limit cavities (407). The limit cavities (407), the limit holes (401) and the outer walls of the circular fixed head (4) are all provided with movable holes (408), and the movable pull rod (403) passes through the movable hole (408) and the limit cavities (407) and extends to the outside of the circular fixed head (4).

2. The plastic straw for separating serum from blood according to claim 1, characterized in that: A connector a (303) is provided on the outside of the discharge pipe (3), a socket (304) communicating with the discharge pipe (3) is provided inside the connector a (303), a connector b (305) is installed at one end of the delivery hose (301), and a connecting pipe (306) used in conjunction with the socket (304) is installed at one end of the connector b (305).

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