A centrifuge tube for extracting blood plasma

Abstract

This invention discloses a centrifuge tube for extracting plasma, belonging to the field of medical device technology. It includes a centrifuge tube body for holding blood, with a suction port at the bottom. An elastic sheet is provided on the suction port for sealing it. A protective ring is located at the bottom of the centrifuge tube body, and a piercing component is located inside the protective ring for piercing the elastic sheet. This invention works by having the input end of a pipette contact the contact ring, which in turn moves the piercing needle towards the suction port to pierce the elastic sheet. This allows the piercing needle to enter the interior of the centrifuge tube body. At this point, the piercing needle directly contacts the plasma sediment at the bottom of the centrifuge tube body, allowing the pipette to be directly operated to aspirate the plasma. This avoids the problem of the pipette contacting fat particles on the upper layer of the plasma sediment in traditional operations, thus improving the purity of the plasma.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a centrifuge tube for extracting plasma. Background Technology

[0002] As an important component of blood, plasma has key value in medical diagnosis, treatment and biomedical research. In clinical testing, blood is usually placed in centrifuge tubes and centrifuged at high speed to separate the blood into layers. The plasma supernatant after separation will settle at the bottom of the centrifuge tube. When needed, the plasma supernatant can be extracted by inserting a pipette into the centrifuge tube.

[0003] However, the current extraction method has certain drawbacks. After blood is separated into layers, the fat layer is located on top of the plasma. During the process of inserting the pipette and drawing plasma, it will come into contact with the upper fat layer. After the plasma is drawn, fat particles will inevitably adhere to the surface of the pipette. These adhered fat particles may enter the extracted plasma sample with subsequent operations, thus contaminating the plasma sample. The contamination of the plasma sample will cause deviations in subsequent analysis and test results, thereby interfering with the doctor's accurate judgment.

[0004] Therefore, to address the above issues, we propose a centrifuge tube capable of extracting plasma. Utility Model Content

[0005] This invention provides a centrifuge tube capable of extracting plasma to solve the aforementioned technical problems.

[0006] The present invention adopts the following technical solution: a centrifuge tube body for holding blood is included. A suction port is provided at the bottom of the centrifuge tube body. An elastic sheet is provided on the suction port for sealing the suction port. A protective ring is provided at the bottom of the centrifuge tube body. A puncture component for puncturing the elastic sheet is provided inside the protective ring. The puncture component includes a puncture needle located below the suction port and an abutment ring for connecting an external pipette. The abutment ring is connected to the blunt end of the puncture needle and is slidably connected to the protective ring. When the input end of the pipette abuts against the puncture component, the abutment needle punctures the elastic sheet and extends into the centrifuge tube body to extract plasma.

[0007] Furthermore, the piercing needle is provided with a limiting ring, which is used to limit the length of the piercing needle penetrating the centrifuge tube body.

[0008] Furthermore, the inner wall of the contact ring is provided with an elastic ring for sealing between the input end of the pipette and the inner wall of the contact ring.

[0009] Furthermore, a spring is connected between the inner wall of the limiting ring and the protective ring, and the spring is used to reset the puncture component.

[0010] Furthermore, the inner diameter of the elastic ring gradually increases from top to bottom.

[0011] Furthermore, a sealing cap for sealing the protective ring is connected to the outside of the protective ring via a connecting soft band, and the sealing cap is threadedly connected to the protective ring.

[0012] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0013] In this invention, the input end of the pipette contacts the contact ring, and the contact ring drives the piercing needle to move towards the aspiration port to pierce the elastic sheet, thereby allowing the piercing needle to enter the interior of the centrifuge tube. At this time, the piercing needle directly contacts the plasma supernatant at the bottom of the centrifuge tube, and the pipette can be directly operated to aspirate the plasma supernatant. This avoids the problem of the pipette contacting the fat particles on the upper layer of plasma supernatant under traditional operation, thus improving the purity of the plasma. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a three-dimensional structural diagram of the connection between the centrifuge tube body and the pipette of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 3 This utility model Figure 1 A schematic diagram of the cross-sectional structure;

[0018] Figure 4 This utility model Figure 2 A schematic diagram of the cross-sectional structure;

[0019] Figure 5 This is a partial cross-sectional structural diagram of the present invention;

[0020] Figure 6 This utility model Figure 4 A magnified structural diagram of A in the diagram.

[0021] Figure Labels

[0022] Centrifuge tube body 1, suction port 2, elastic sheet 3, protective ring 4, piercing needle 51, contact ring 52, pipette 6, limiting ring 7, elastic ring 8, spring 9, connecting strap 10, sealing cap 11, cap 12. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0025] This utility model provides a centrifuge tube for extracting plasma, including a centrifuge tube body 1. In use, blood is placed inside the centrifuge tube body 1, and then the cap 12 at the top of the centrifuge tube body 1 covers the opening. The centrifuge tube body 1 is then placed in a centrifuge for centrifugation. After centrifugation, the blood separates into layers: an upper fat layer and a lower clear plasma layer. To facilitate plasma extraction while avoiding contact with the upper fat particles, a suction port 2 is provided at the bottom of the centrifuge tube body 1. The suction port 2 is equipped with an elastic sheet 3 for sealing the suction port 2. The elastic sheet 3 can be made of rubber, silicone, or other materials. To facilitate puncturing the elastic sheet 3 and entering the centrifuge tube body 1 through the suction port 2 for plasma extraction, a protective ring 4 is provided at the bottom of the centrifuge tube body 1. The interior of the protective ring 4 is equipped with a... For the piercing assembly that pierces the elastic sheet 3, the thickness of the elastic sheet 3 can be relatively thin to facilitate piercing of the elastic sheet 3. The piercing assembly includes a piercing needle 51 located below the suction port 2 and an abutment ring 52 for connecting an external pipette 6. The abutment ring 52 is connected to the blunt end of the piercing needle 51. The outer wall of the abutment ring 52 is slidably connected to the inner wall of the protective ring 4. By contacting the input end of the pipette 6 with the output end of the abutment ring 52 and pressing it upward against the abutment ring 52, the abutment ring 52 drives the piercing needle 51 to slide on the inner wall of the protective ring 4. Then, the piercing needle 51 gradually contacts the elastic sheet 3, and its tip pierces the elastic sheet 3 and enters the interior of the centrifuge tube body 1. The pipette 6 can then be directly operated to extract plasma from the interior of the centrifuge tube body 1, avoiding contamination of the plasma caused by contact with fat particles in the traditional process.

[0026] Preferably, to prevent the piercing needle 51 from penetrating too far into the centrifuge tube body 1, a limiting ring 7 is provided on the piercing needle 51. When the piercing needle 51 pierces the elastic sheet 3 and enters the centrifuge tube body 1, the limiting ring 7 will contact the bottom of the centrifuge tube body 1. Under the obstruction of the bottom of the centrifuge tube body 1, the limiting ring 7 is used to limit the length of the piercing needle 51 penetrating into the centrifuge tube body 1, so that the limiting ring 7 can ensure that the piercing needle 51 accurately penetrates to a suitable position in the plasma layer, avoiding penetrating too deeply into other components, thereby ensuring high purity of the drawn plasma, reducing contamination of the plasma sample by other components, and improving the accuracy of subsequent detection and analysis results.

[0027] Preferably, to ensure a seal between the pipette 6 and the contact ring 52 during plasma aspiration, an elastic ring 8 is provided on the inner wall of the contact ring 52. The elastic ring 8 can be made of materials such as rubber or silicone. When the limiting ring 7 contacts the bottom of the centrifuge tube body 1, a certain resistance is generated during the upward contact of the contact ring 52. At this time, the input end of the pipette 6 will compress the elastic ring 8, causing it to deform. The deformed elastic ring 8 will then make tight contact with the pipette 6, achieving a seal between them and preventing plasma from leaking out of the gap during plasma aspiration. To prevent contamination from overflowing, and to ensure a proper seal between the elastic ring 8 and different pipettes 6, the inner diameter of the elastic ring 8 gradually increases from top to bottom. This allows pipettes 6 with different outer diameters to find a suitable sealing position within the elastic ring 8. The thinner pipette 6 can be inserted into the smaller inner diameter of the upper part of the elastic ring 8 for a tight seal, while the thicker pipette 6 can achieve a good seal at the larger inner diameter of the lower part of the elastic ring 8. This greatly improves the compatibility of the centrifuge tube body 1 with different pipettes 6 and increases its flexibility of use.

[0028] Preferably, in order to enable the puncture component to automatically reset, a spring 9 is connected between the inner walls of the limiting ring 7 and the protective ring 4. When the pipette 6 abuts against the abutment ring 52 to puncture the elastic sheet 3 and complete the plasma extraction, the operator does not need to manually restore the puncture component to the initial position. The spring 9 will restore its deformation and automatically pull the puncture component back. At this time, the elastic sheet 3 will not leak even if it is punctured due to its own elasticity, thus reducing the possibility of plasma leakage from the puncture needle 51 and causing contamination.

[0029] Preferably, in order to seal the inside of the protective ring 4, a sealing cap 11 for sealing the protective ring 4 is connected to the outside of the protective ring 4 via a connecting soft band 10. The sealing cap 11 is threadedly connected to the protective ring 4. The connecting soft band 10 can be made of a relatively soft material such as plastic or cloth. Before plasma extraction, the sealing cap 11 is threadedly connected to the protective ring 4 to seal the protective ring 4, which can prevent contamination inside the protective ring 4. After plasma extraction is completed, the sealing cap 11 is threadedly connected to the protective ring 4 to prevent contamination of the protective ring 4 to the external environment. Together with the cap 12, it acts on the centrifuge tube body 1. When the centrifuge tube body 1 is thrown into the medical waste bin, it can seal the centrifuge tube body 1, prevent the leakage of remaining liquid, and improve the safety of subsequent waste disposal.

[0030] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A centrifugation tube for extractable plasma comprising a centrifugation tube body (1) for containing blood, characterized in that, The centrifuge tube body (1) has a suction port (2) at the bottom, and the suction port (2) is provided with an elastic sheet (3) for sealing the suction port (2). The centrifuge tube body (1) has a protective ring (4) at the bottom, and the protective ring (4) has a puncturing component inside for puncturing the elastic sheet (3). The puncture assembly includes a puncture needle (51) located below the suction port (2) and an abutment ring (52) for connecting an external pipette (6). The abutment ring (52) is connected to the blunt end of the puncture needle (51) and is slidably connected to the protective ring (4). When the input end of the pipette (6) comes into contact with the puncture assembly, the abutment needle (51) punctures the elastic sheet (3) and extends into the interior of the centrifuge tube body (1) to extract plasma.

2. The plasma extractable centrifuge tube of claim 1, wherein, The piercing needle (51) is provided with a limiting ring (7), which is used to limit the length of the piercing needle (51) piercing the centrifuge tube body (1).

3. The plasma extractable centrifuge tube of claim 1, wherein, The inner wall of the contact ring (52) is provided with an elastic ring (8) for sealing between the input end of the pipette (6) and the inner wall of the contact ring (52).

4. The plasma extractable centrifuge tube of claim 2, wherein, A spring (9) is connected between the inner wall of the limiting ring (7) and the protective ring (4), and the spring (9) is used to reset the puncture component.

5. The plasma extractable centrifuge tube of claim 3, wherein, The inner diameter of the elastic ring (8) gradually increases from top to bottom.

6. The plasma extractable centrifuge tube of claim 1, wherein, The protective ring (4) is connected to a sealing cap (11) for sealing the protective ring (4) via a connecting soft band (10), and the sealing cap (11) is threadedly connected to the protective ring (4).

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