A platelet-rich plasma preparation device

Abstract

The utility model relates to the field of biomedical technology, concretely is a kind of platelet-rich plasma preparation device.The device includes storage tube, sealing cover and piston assembly.Storage tube is divided into storage part and injection part, and stop structure is arranged in storage cavity;Sealing cover is in interference fit with injection part and can be punctured, and closed blood sampling is realized in combination with vacuum negative pressure cavity.Piston assembly realizes locking and release by the cooperation of elastic movable head and stop structure, ensures that each blood layer is independently pushed after centrifugal stratification, and avoids cross contamination.Storage tube is made of transparent material and is provided with scale, so that stratification state and accurate separation can be observed.The device is integrated with blood sampling, centrifugation and extraction functions, and PRP preparation can be completed through single centrifugation and push-pull piston, which is convenient to operate and high in efficiency.The utility model solves the problems of complex operation, low separation efficiency and easy pollution of traditional method, and significantly improves the reliability and practicality of PRP preparation.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and more specifically, to a platelet-rich plasma preparation device. Background Technology

[0002] With the development of biomedical technology, the separation and application of blood components are becoming increasingly important in the medical field. Platelet-rich plasma (PRP) has attracted much attention due to its effects on tissue repair and wound healing. However, existing PRP preparation techniques, such as the traditional manual two-step centrifugation method, have some shortcomings.

[0003] Currently, common separation methods mainly rely on one or two centrifugations to separate blood into three layers: a plasma layer, a platelet-rich white blood cell layer, and a red blood cell layer. However, when extracting these layers, a tilting pouring method is often used. This operation is not only inconvenient and makes it difficult to achieve complete separation of the layers, but it also easily introduces red blood cells, affecting the effectiveness of platelet recovery plasma (PRP) (for example, it may cause inflammation). In addition, this method usually has a low platelet recovery rate and efficiency. During the separation process, it may be necessary to change the centrifugation container, which increases the risk of sample contamination by external bacteria or the introduction of other components.

[0004] Meanwhile, traditional vacuum blood collection tubes also present inconveniences in blood collection and subsequent processing. For example, opening the cap may be laborious, causing sample oscillation, tube breakage, or aerosol contamination. The tube label may obstruct vision, affecting blood volume observation and automated testing. Blood volume may also be inaccurate due to factors such as the volume and temperature of the lancet lumen. Furthermore, samples typically need to be removed from the tube after collection before testing, increasing operational steps and time. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a platelet-rich plasma preparation device that is easy to operate, has high separation efficiency, effectively avoids cross-contamination, ensures PRP purity, and improves platelet recovery rate.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A platelet-rich plasma (PRP) preparation device includes a storage tube, a sealing cap, and a piston assembly. The storage tube includes a storage section and an injection section that are interconnected. The storage section includes a storage cavity with a stop structure inside. The sealing cap cooperates with the injection section and seals the injection section; the sealing cap is puncture-resistant. The piston assembly is placed inside the storage cavity and includes a piston head and a movable head. The piston head is connected to the movable head, and the movable head has a stop section that cooperates with the stop structure to lock the piston. The piston and the sealing cap cooperate to create a vacuum negative pressure chamber in the storage cavity.

[0008] Furthermore, the stop structure is a T-shaped component, and the stop part is composed of an interconnected stop groove and a clearance groove. The stop groove has a T-shaped cross-section and is used for the stop of the T-shaped component; the piston and the moving head are both made of elastic material.

[0009] Furthermore, the stop structure is a columnar member, and the stop part is composed of a limiting groove, a transition groove and a through groove connected in sequence. The limiting groove, the transition groove and the through groove form a "ㄣ" shape. The limiting groove is used to limit the columnar member, the transition groove is slidably connected to the columnar member, and the through groove is used for the columnar member to disengage from the movable head.

[0010] Furthermore, the movable head is composed of a plug-in body, a connecting body, and a locking body connected in sequence. The plug-in body is connected to the piston, and the stop part is provided on the locking body. The plug-in body, the connecting body, and the locking body are coaxial and all have circular cross-sections. The diameter of the plug-in body is larger than the diameter of the connecting body, and the diameter of the locking body is larger than the diameter of the plug-in body. The storage part is in the shape of a cylindrical tube.

[0011] Furthermore, two stop structures are provided and correspondingly arranged, and two stop parts are provided and correspond one-to-one with the two stop structures.

[0012] Furthermore, the injection unit includes a first injection channel and a second injection channel that are interconnected. Both the first injection channel and the second injection channel are frustum-shaped. The diameters of the first injection channel and the second injection channel gradually increase from the first injection channel to the second injection channel. The maximum diameter of the first injection channel is smaller than the minimum diameter of the second injection channel. The second injection channel is connected to the storage unit.

[0013] Furthermore, the sealing cap consists of a cap body and a sealing body. The cap body is cylindrical, and the sealing body is tubular. The sealing body is fixed inside the cap body, and the sealing body and the cap body form an insertion groove. The sealing body can be inserted into the first injection channel, and the injection part can be inserted into the insertion groove.

[0014] Furthermore, the preparation device also includes a sealing seat, which has a sealing cavity. The inner wall of the sealing cavity is provided with an internal thread, and the outer wall of the storage part is provided with an external thread. The internal thread and the external thread are connected in a mating manner.

[0015] Furthermore, the preparation apparatus also includes a top cover, which is inserted into the injection section.

[0016] Furthermore, the storage tube is made of a transparent material, and the outer wall of the storage tube has graduations.

[0017] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0018] 1. High efficiency separation and high recovery rate:

[0019] By precisely matching the movable head made of elastic material with the stop structure (T-shaped or columnar), the piston assembly can be locked and released in a controlled manner, ensuring that the platelet-rich layer, plasma layer and red blood cell layer after centrifugation are pushed independently, avoiding cross-contamination.

[0020] The transparent tube wall combined with the scale design allows for real-time observation of the layering status, precise separation of the target layer, and improved platelet recovery rate.

[0021] 2. Easy to operate and simplified process:

[0022] The integrated design combines storage, separation, and extraction functions, requiring only a single centrifugation and piston push-pull operation to complete PRP preparation, resulting in shorter operation time.

[0023] It can puncture the sealing cap and work with the vacuum negative pressure chamber, so there is no need to open the cap when collecting blood. Blood can be automatically drawn in by directly inserting the needle, reducing manual intervention steps.

[0024] 3. Reliable pollution prevention and sealing:

[0025] The sealing cap and the injection section are fitted with an interference fit through a groove, which, combined with the threaded sealing seat, forms a multi-layered sealing barrier to prevent air or bacteria from entering and reduce the risk of contamination.

[0026] The elastic stop structure fits completely against the storage chamber wall when locked, preventing sample leakage caused by accidental piston movement during centrifugation or transportation.

[0027] 4. Compact structure and portability:

[0028] The storage tube is made of lightweight and transparent material with clear markings on the outer wall, making it easy to carry and monitor blood volume in real time. It is suitable for clinical, emergency and field scenarios.

[0029] The removable top cover and sealing base design facilitates cleaning, disinfection, and reuse, reducing operating costs. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0031] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0032] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0033] Figure 4 This is a structural diagram when the stop structure is a T-shaped member.

[0034] Figure 5 This is a structural diagram when the stop structure is a columnar member.

[0035] Figure 6 This is a schematic diagram of the movable head.

[0036] Figure 7 This is a schematic diagram of the sealing cap.

[0037] Figure 8 This is a schematic diagram of the injection section.

[0038] Figure 9 This is a schematic diagram of the sealing seat.

[0039] Reference numerals: Top cover 1, Sealing cover 2, Cover body 2a, Sealing body 2b, Insertion groove 201, Storage tube 3, Storage part 31, Injection part 32, Stop structure 33, Storage cavity 301, First injection channel 302, Second injection channel 303, External thread 305, Piston assembly 4, Piston head 41, Moving head 42, Insertion body 42a, Connecting body 42b, Locking body 42c, Stop part 401, Stop groove 4a, Displacement groove 4b, Limiting groove 4c, Transition groove 4d, Through groove 4e, Sealing seat 5, Sealing cavity 501, Internal thread 502. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] like Figure 1 and Figure 2 As shown, the platelet-rich plasma (PRP) preparation device includes a top cover 1, a sealing cap 2, a storage tube 3, a piston assembly 4, and a sealing seat 5. The sealing tube is used to seal the top of the storage tube 3. The top cover 1 is detachably connected to the storage tube 3 to protect both the storage tube and the sealing cap 2. The sealing seat 5 is detachably connected to the bottom of the storage tube 3 to protect the bottom of the storage tube 3. The storage tube 3 is made of a transparent material, and its outer wall has graduations.

[0043] like Figure 2As shown, the storage tube 3 includes a storage section 31 and an injection section 32 that are interconnected. The storage section 31 includes a storage cavity 301. The piston and the sealing cap 2 cooperate to form a vacuum negative pressure cavity in the storage cavity 301. The sealing cap 2 cooperates with the injection section 32 and is used to seal the injection section 32. The sealing cap 2 can be punctured. During blood collection, the sealing cap 2 is punctured by a needle, and under the action of the vacuum negative pressure cavity, blood can be collected into the storage cavity 301, thereby avoiding the need for opening the cap and ensuring a completely closed process.

[0044] like Figure 3 As shown, a stop structure 33 is provided in the storage cavity 301. The piston assembly 4 is placed in the storage cavity 301 and includes a piston head 41 and a movable head 42. The piston head 41 is connected to the movable head 42. A stop part 401 that cooperates with the stop structure 33 is provided on the movable head 42. The movable head 42 cooperates with the stop structure 33 and is used to lock the piston head 41. There are two stop structures 33 and they are symmetrically arranged. There are two stop parts 401 and they correspond one-to-one with the two stop structures 33.

[0045] During blood collection, in order to ensure that the piston does not easily move upward (towards the sealing cap 2) under negative pressure, the stop part 401 on the moving head 42 engages with the stop structure 33 in the storage cavity 301, thereby fixing and restricting the piston; when it is necessary to push the separated blood layers, the stop part 401 disengages from the stop structure 33, and the moving head 42 is pushed by external push rods and other components, thereby pushing the piston upward.

[0046] like Figure 4 As shown, when the stop structure 33 is a T-shaped component, the stop part 401 is composed of a stop groove 4a and a relief groove 4b that are interconnected. The stop groove 4a has a T-shaped cross section and is used for stopping the T-shaped component. The piston and the moving head 42 are both made of elastic material.

[0047] When the movable head 42 is installed inside the storage tube 3 and cooperates with the stop structure 33, since the movable head 42 is made of elastic material, the corresponding part at the clearance groove 4b can deform, allowing the stop structure 33 to enter the clearance groove 4b. When the stop structure 33 and the stop part 401 cooperate to fix the piston, the stop structure 33 slides into the stop groove 4a, making it difficult for the piston head 41 to move under the action of external force; when the piston needs to be pushed, the stop structure 33 moves into the clearance groove 4b, and the stop structure 33 no longer restricts the piston head 41, allowing the piston to be easily pushed.

[0048] like Figure 5As shown, the stop structure 33 is a columnar member, and the stop part 401 is composed of a limiting groove 4c, a transition groove 4d and a through groove 4e connected in sequence. The limiting groove 4c, the transition groove 4d and the through groove 4e form a "ㄣ" shape. The limiting groove 4c is used to limit the columnar member, the transition groove 4d is slidably connected to the columnar member, and the through groove 4e is used for the columnar member to disengage from the movable head 42.

[0049] When the stop structure 33 and the stop part 401 cooperate to fix the piston, the stop structure 33 slides into the limiting groove 4c or the transition groove 4d, making it difficult for the piston head 41 to move under the action of external force; when the piston head 41 needs to be pushed, the stop structure 33 moves through the transition groove 4d to the through groove 4e, and the stop structure 33 no longer restricts the piston head 41, and the piston head 41 can be easily pushed.

[0050] like Figure 6 As shown, the movable head 42 is composed of a plug-in body 42a, a connecting body 42b, and a locking body 42c, which are sequentially connected and integrally formed. The movable head 42 is made of elastic materials such as rubber and silicone. The plug-in body 42a is detachably connected to the piston head 41, making it difficult for the piston head 41 to rotate when the movable head 42 rotates horizontally. The storage part 31 is cylindrical, with the plug-in body 42a, connecting body 42b, and locking body 42c coaxial and having circular cross-sections. The diameter of the plug-in body 42a is larger than that of the connecting body 42b, and the diameter of the locking body 42c is larger than that of the plug-in body 42a. This arrangement facilitates the rotational adjustment of the movable head 42, and makes it easier for the stop structure 33 to cooperate with the movable head 42: the diameter of the connecting body 42b is much smaller than that of the plug-in body 42a and the locking body 42c, which ensures the rotational connection between the plug-in body 42a and the connecting hole of the piston head 41, and the elastic and hollow plug-in body 42a can be more easily inserted into the connecting hole of the piston head 41. A stop part 401 is provided on the outer wall of the locking body 42c, which can be engaged or slidably connected with the stop structure 33.

[0051] like Figure 7 As shown, the sealing cap 2 consists of a cap body 2a and a sealing body 2b. The cap body 2a is cylindrical, and the sealing body 2b is tubular. The sealing body 2b is fixed inside the cap body 2a, and the sealing body 2b and the cap body 2a form an insertion groove 201. The sealing body 2b can be inserted into the first injection channel 302, and the injection part 32 can be inserted into the insertion groove 201. With this configuration, the sealing cap 2 and the injection part 32 are interference-fitted, increasing the friction between them and thus achieving a better sealing effect.

[0052] like Figure 8As shown, the injection section 32 includes a first injection channel 302 and a second injection channel 303 that are interconnected. Both the first injection channel 302 and the second injection channel 303 are frustoconical in shape. The diameters of the first injection channel 302 and the second injection channel 303 gradually increase from the first injection channel 302 to the second injection channel 303, with the maximum diameter of the first injection channel 302 being smaller than the minimum diameter of the second injection channel 303. The second injection channel 303 is connected to the storage section 31. This arrangement helps guide blood to flow smoothly from the inlet to the storage section 31, reducing flow resistance and potential damage to blood cells. As a key channel connecting the outside (blood collection needle) and the inside (vacuum storage chamber 301), the injection section 32, with its specific shape and cooperation with the sealing cap 2 and the vacuum chamber, achieves automatic and sealed injection of blood under negative pressure.

[0053] like Figure 9 As shown, the sealing seat 5 has a sealing cavity 501. An internal thread 502 is formed on the inner wall of the sealing cavity 501, and an external thread 305 is formed on the outer wall of the storage section 31. The internal thread 502 and the external thread 305 are threaded together to achieve the detachable connection between the sealing seat 5 and the storage tube. The top cover 1 is inserted into the injection section 32. Before use, it protects the injection section 32 at the top of the storage tube 3 and the sealing cover 2 below it, preventing dust and contaminants from entering the injection section 32. The insertion design also makes the installation and removal of the top cover 1 easy.

[0054] The sealing seat 5 engages with the external thread 305 on the outer wall of the storage section 31 via its internal thread 502, achieving a detachable connection with the storage tube 3. It acts as a base or bottom cover, protecting the bottom of the storage tube 3 from impacts or abrasion during use, transportation, or placement. The threaded connection ensures a stable connection while also facilitating disassembly when needed.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A platelet-rich plasma preparation device, characterized in that, include The storage tube includes a storage section and an injection section that are interconnected. The storage section includes a storage cavity, and a stop structure is provided inside the storage cavity. A sealing cap, which mates with the injection section and is used to seal the injection section, and the sealing cap can be punctured. A piston assembly, placed within a storage cavity, includes a piston head and a movable head. The piston head is connected to the movable head, and the movable head has a stop portion that mates with a stop structure. The movable head mates with the stop structure and is used to lock the piston. The piston and the sealing cap work together to create a vacuum negative pressure chamber in the storage cavity.

2. The platelet-rich plasma preparation apparatus according to claim 1, characterized in that, The stop structure is a T-shaped member, and the stop part consists of interconnected stop grooves and clearance grooves. The stop grooves have a T-shaped cross-section and are used for stopping the T-shaped member. Both the piston and the moving head are made of elastic material.

3. The platelet-rich plasma preparation device according to claim 1, characterized in that, The stop structure is a columnar member. The stop part is composed of a limiting groove, a transition groove and a through groove connected in sequence. The limiting groove, the transition groove and the through groove form a "ㄣ" shape. The limiting groove is used to limit the columnar member. The transition groove is slidably connected to the columnar member. The through groove is used for the columnar member to disengage from the movable head.

4. A platelet-rich plasma preparation apparatus according to claim 2 or 3, characterized in that, The movable head consists of a plug-in body, a connecting body, and a locking body connected in sequence. The plug-in body is connected to the piston, and the stop part is provided on the locking body. The plug-in body, connector, and locking body are coaxial and all have circular cross-sections. The diameter of the plug-in body is larger than the diameter of the connector, and the diameter of the locking body is larger than the diameter of the plug-in body. The storage section is in the shape of a cylindrical tube.

5. The platelet-rich plasma preparation apparatus according to claim 4, characterized in that, The stop structure is provided in two and is set accordingly, and the stop part is provided in two and corresponds one-to-one with the two stop structures.

6. The platelet-rich plasma preparation apparatus according to claim 5, characterized in that, The injection unit includes a first injection channel and a second injection channel that are interconnected. Both the first injection channel and the second injection channel are frustum-shaped. The diameters of the first injection channel and the second injection channel gradually increase from the first injection channel to the second injection channel. The maximum diameter of the first injection channel is smaller than the minimum diameter of the second injection channel. The second injection channel is connected to the storage unit.

7. The platelet-rich plasma preparation apparatus according to claim 6, characterized in that, The sealing cap consists of a cap body and a sealing body. The cap body is cylindrical and the sealing body is tubular. The sealing body is fixed inside the cap body, and the sealing body and the cap body form an insertion groove. The sealing body can be inserted into the first injection channel, and the injection part can be inserted into the insertion groove.

8. The platelet-rich plasma preparation apparatus according to claim 4, characterized in that, The preparation device also includes a sealing seat, which has a sealing cavity. The inner wall of the sealing cavity is provided with an internal thread, and the outer wall of the storage part is provided with an external thread. The internal thread and the external thread are connected in a mating manner.

9. The platelet-rich plasma preparation apparatus according to claim 8, characterized in that, The preparation apparatus also includes a top cover, which is inserted into the injection section.

10. The platelet-rich plasma preparation apparatus according to claim 4, characterized in that, The storage tube is made of a transparent material and has graduations on its outer wall.

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