Platelet-rich plasma preparation device

Abstract

The utility model relates to a platelet-rich plasma preparation device which comprises a main body pipe and an upper cavity, and a containing part, a first assembly communicated with the containing part and an overflow part capable of being communicated with the first assembly through an outer overflow opening formed in the first assembly are arranged in the main body pipe; the upper cavity is used for opening or closing the outer overflow port; the outer overflow port is opened through the upper cavity, and platelet-poor plasma in the first assembly can overflow to the overflow part, so that the concentration multiple of platelet-rich plasma can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a platelet-rich plasma preparation device. Background Art

[0002] Cartilage injuries, meniscus injuries, ligament / tendon injuries, osteoarthritis, tennis elbow, total knee replacement, etc. in sports medicine can all be repaired by injecting PRP (platelet-rich plasma); in addition, PRP also plays an important therapeutic role in orthopedics (such as treating bone defects), medical aesthetics, oral restoration, etc.

[0003] However, for the treatment of different diseases, different concentration multiples and different amounts of PRP are needed for targeted treatment, while the existing platelet-rich plasma preparation devices can only obtain PRP with a single concentration multiple, which is difficult to meet the needs of obtaining PRP with different concentration multiples. Utility Model Content

[0004] The utility model aims to provide a platelet-rich plasma preparation device, so as to solve the technical problem that the platelet-rich plasma preparation device in the prior art can only obtain PRP with a single concentration multiple and is difficult to obtain PRP with different concentration multiples.

[0005] The utility model provides a platelet-rich plasma preparation device, comprising: a main body tube, an upper cavity and a pushing component; the main body tube is provided with a accommodating portion, a first component connected to the accommodating portion and an overflow portion that can be connected to the first component through an external overflow port arranged on the first component; the upper cavity body comprises an upper cavity cover and a second component fixed on the upper cavity cover, the second component is movably arranged in the first component to open or close the external overflow port; the pushing component is movably arranged in the accommodating portion to be able to move up and down in the height direction of the main body tube.

[0006] The platelet-rich plasma preparation device provided by the utility model can control the switch of the external overflow port through the second component to adjust the amount of PPP overflowing to the overflow part, thereby adjusting the remaining amount of PPP in the inner cavity, and then adjusting the total amount of platelet-rich plasma and platelet-poor plasma, and then adjusting the concentration multiple of platelet-rich plasma. The platelet-rich plasma preparation device provided by the utility model can realize the adjustable concentration multiple of platelet-rich plasma, so that platelet-rich plasma with different concentration multiples can be prepared according to different needs.

[0007] Furthermore, the second component is rotatably arranged in the first component; the second component is provided with an internal overflow port which can be communicated with the external overflow port.

[0008] The structure of the platelet-rich plasma preparation device can be made compact, and small space is occupied during use.

[0009] Furthermore, in the circumferential direction of the first component, at least one external overflow port is provided on the first component, and at least one internal overflow port is provided on the second component.

[0010] As an optional solution, there are multiple external overflow ports, which are arranged in a stepped manner on the peripheral wall of the first component; there is one internal overflow port, which extends along the height direction of the main tube.

[0011] As an optional solution, the number of the external overflow port is one, and the external overflow port spirally rises from bottom to top along the peripheral wall of the first component; the number of the internal overflow port is one, and the internal overflow port extends along the height direction of the main tube.

[0012] Furthermore, the main tube also includes: a throat and an outer sleeve; the throat is connected between the accommodating portion and the first component; the outer sleeve is sleeved outside the first component and the throat to form the overflow portion; the upper cavity cover is connected to the upper end of the outer sleeve.

[0013] Furthermore, the ratio of the sum of the capacity of the cavity enclosed by the inner wall of the second component and the inner wall of the first component and the capacity of the throat to the capacity of the accommodating portion is 1:1.2-1:1.

[0014] Furthermore, the pushing assembly includes: a piston and a rotary cover; along the height direction of the main tube, a plurality of annular protrusions are spaced apart on the outer wall of the piston, and the annular protrusions abut against the inner wall of the accommodating portion; the rotary cover is connected to the piston; the rotary cover is connected to the accommodating portion by a thread.

[0015] The push-and-extend assembly of this structure is compact, occupies little space, has reliable connection and smooth movement.

[0016] Furthermore, an injection suction port and an overflow suction port are provided on the upper chamber cover; the platelet-rich plasma preparation device also includes a PRP guide tube, one end of which is connected to the injection suction port and the other end extends to the throat; the overflow suction port is connected to the overflow part.

[0017] Furthermore, a vent hole is provided on the upper cavity cover, and a filtering structure is provided at the vent hole; an inner cavity surrounded by the inner wall of the first component, the inner wall of the second component and the inner wall of the accommodating portion and the overflow portion are both connected to the vent hole.

[0018] Through the vent hole, the inner cavity and the overflow part can be connected to the external environment, so as to achieve internal and external pressure balance; setting a filtering structure can prevent bacteria from entering the inner cavity and the overflow part.

[0019] It should be understood that both the foregoing general description and the following specific embodiments are for the purpose of example and illustration and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic structural diagram of a platelet-rich plasma preparation device according to a first embodiment of the utility model;

[0022] Figure 2 for Figure 1 A cross-sectional view of a platelet-rich plasma preparation device is shown;

[0023] Figure 3 This is a schematic structural diagram of a platelet-rich plasma preparation device according to a second embodiment of the present invention;

[0024] Figure 4 This is a schematic structural diagram of a platelet-rich plasma preparation device according to a third embodiment of the present invention;

[0025] Figure 5 for Figure 4 An exploded view of a platelet-rich plasma preparation device is shown;

[0026] Figure 6 for Figure 4 An enlarged view of point A in the platelet-rich plasma preparation device is shown.

[0027] Icons: 1-main tube; 2-upper cavity; 3-push-extension assembly; 4-injection suction port; 5-sealing structure; 6-PRP guide tube; 7-vent; 8-filter structure; 9-overflow suction port; 10-first plugging cover; 20-second plugging cover; 101-accommodating part; 102-first assembly; 103-external overflow port; 104-overflow part; 105-throat; 106-outer sleeve; 201-upper cavity cover; 202-second assembly; 203-inner overflow port; 301-piston; 302-annular protrusion; 303-slot; 304-screw cover; 305-connecting plate; 306-block. DETAILED DESCRIPTION

[0028] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0029] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0030] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] like Figures 1 to 6 As shown, the utility model provides a platelet-rich plasma preparation device, comprising: a main tube 1, an upper cavity 2 and a pushing component 3; the main tube 1 is provided with a housing 101, a first component 102 connected to the housing 101, and an overflow portion 104 that can be connected to the first component 102 through an external overflow port 103 arranged on the first component 102; the upper cavity 2 comprises an upper cavity cover 201 and a second component 202 fixed on the upper cavity cover 201, the second component 202 is movably arranged in the first component 102 to open or close the external overflow port 103; the pushing component 3 is movably arranged in the housing 101 to be able to move up and down in the height direction of the main tube 1, and when the pushing component 3 moves upward, the capacity of the housing 101 connected to the first component 102 (that is, the actual volume of the liquid that can be accommodated) can be reduced, and when the pushing component 3 moves downward, the capacity of the housing 101 connected to the first component 102 can be expanded.

[0035] In this embodiment, the inner wall of the first component 102, the inner wall of the second component 202 and the inner wall of the accommodating portion 101 form an inner cavity, and blood and anticoagulant are injected into the inner cavity; the platelet-rich plasma preparation device containing blood and anticoagulant is placed in a centrifuge for centrifugation. After centrifugation, the blood is divided into a platelet-poor plasma layer (PPP layer), a platelet-rich plasma layer (PRP layer) and a red blood cell layer from top to bottom (from the direction of the upper cavity cover 201 pointing to the main body tube 1); the pushing component 3 is driven to move upward or downward (the direction close to the upper cavity cover 201 is upward) to move the stratified blood upward or downward until the PPP layer is located in the first component 102; the upper cavity cover 201 is driven to move upward or downward. 01 moves, the upper chamber cover 201 drives the second component 202 to move, so as to open the external overflow port 103, thereby opening the overflow channel for PPP to enter the overflow part 104 from the first component 102, and the PPP in the first component 102 can overflow from the external overflow port 103 to the overflow part 104; when PPP overflows the set amount, the upper chamber cover 201 is driven to move, and the upper chamber cover 201 drives the second component 202 to move, so as to close the external overflow port 103, thereby closing the overflow channel and preventing PPP from overflowing to the overflow part 104; the remaining PPP and PRP in the inner cavity can be extracted by a syringe and other components, so as to obtain the platelet-rich plasma with the required concentration multiple.

[0036] The platelet-rich plasma preparation device provided in this embodiment can control the switch of the external overflow port 103 through the second component 202 to adjust the amount of PPP overflowing to the overflow portion 104, thereby adjusting the remaining amount of PPP in the inner cavity, and then adjusting the total amount of platelet-rich plasma and platelet-poor plasma, and then adjusting the concentration multiple of platelet-rich plasma. The platelet-rich plasma preparation device provided in this embodiment can achieve adjustable concentration multiples of platelet-rich plasma, so that platelet-rich plasma with different concentration multiples can be prepared according to different needs.

[0037] Among them, there are many ways for the second component 202 to be movably arranged in the first component 102 to open or close the external overflow port 103, for example: the second component 202 is slidably arranged in the first component 102, that is, the second component 202 can move up and down along the height direction of the main tube 1 to expose the external overflow port 103 (that is, open the external overflow port 103) or cover the external overflow port 103 (that is, close the external overflow port 103).

[0038] As an optional solution, the second component 202 is rotatably disposed in the first component 102 to control the opening and closing of the external overflow port 103, so that the structure of the platelet-rich plasma preparation device can be compact and small space is occupied during use.

[0039] Among them, the second component 202 can be set in an arc-shaped plate shape. By rotating the second component 202, the external overflow port 103 can be exposed (that is, the external overflow port 103 is opened) or the external overflow port 103 can be blocked (that is, the external overflow port 103 is closed).

[0040] As an optional solution, the second component 202 is rotatably disposed in the first component 102 ; the second component 202 is provided with an inner overflow port 203 which can communicate with the outer overflow port 103 .

[0041] In this embodiment, when the inner overflow port 203 on the second component 202 is connected to the outer overflow port 103 on the first component 102, the outer overflow port 103 is opened, otherwise, the outer overflow port 103 is closed. The second component 202 can be arranged in a cylindrical shape, so that the second component 202 can be limited everywhere in the first component 102, so that the second component 202 can rotate smoothly.

[0042] Specifically, in the circumferential direction of the first component 102 , at least one external overflow port 103 is provided on the first component 102 , and at least one internal overflow port 203 is provided on the second component 202 .

[0043] As an optional solution, the number of the external overflow port 103 and the number of the internal overflow port 203 are both one. The overflow amount of PPP can be adjusted by controlling the connection time of the external overflow port 103 and the internal overflow port 203, thereby adjusting the remaining amount of PPP in the inner cavity, and then adjusting the concentration multiple of platelet-rich plasma.

[0044] As an optional scheme, there are multiple external overflow ports 103 and multiple internal overflow ports 203, and the multiple external overflow ports 103 correspond to the multiple internal overflow ports 203 one by one, that is, the external overflow ports 103 and the internal overflow ports 203 are arranged in pairs, and when a pair of external overflow ports 103 and internal overflow ports 203 are connected, the remaining pairs of external overflow ports 103 and internal overflow ports 203 are connected, and the overflow amount of PPP is adjusted by controlling the connection time of the external overflow ports 103 and the internal overflow ports 203, thereby adjusting the remaining amount of PPP in the inner cavity, and then adjusting the concentration multiples of platelet-rich plasma.

[0045] For ease of use, scale lines can be set on the outer wall of the first component 102 to indicate the sum of the remaining amount of PPP after overflow and the amount of PRP in the inner cavity, that is, to which scale line the liquid level drops, indicating that the sum of the remaining amount of PPP and the amount of PRP is the amount of the corresponding scale line. For example, scale lines 0-10ml are set on the outer wall of the main tube 1, the amount of blood injected is 30ml, and the liquid level in the inner cavity finally stays at 5ml, then platelet-rich plasma with a concentration factor of 6 times (concentration factor = (V 1÷V2)×DF; wherein, V1 represents the volume of the original blood, in ml; V2 represents the volume of the platelet-rich plasma obtained after concentration, in ml; DF represents the dilution factor, if no dilution is performed, the DF value is 1); the amount of blood injected is 30 ml, and the liquid level in the first cavity finally stays at 6 ml, that is, platelet-rich plasma with a concentration factor of 5 times is obtained; the amount of blood injected is 40 ml, and the liquid level in the inner cavity finally stays at 5 ml, that is, platelet-rich plasma with a concentration factor of 8 times is obtained.

[0046] As an optional solution, there are multiple external overflow ports 103, and the multiple external overflow ports 103 are arranged in a stepped manner on the peripheral wall of the first component 102; there is one internal overflow port 203, and the internal overflow port 203 extends along the height direction of the main tube 1. Specifically, the cross-sectional area of ​​the internal overflow port 203 is not less than the sum of the cross-sectional areas of the multiple external overflow ports 103, and the internal overflow port 203 can cover each external overflow port 103.

[0047] In this embodiment, when the inner overflow port 203 is opposite to an outer overflow port 103, the shape of the cross-section of the overflow channel is the same as the shape of the outer overflow port 103. By rotating the second component 202, the position of the inner overflow port 203 can be changed, thereby changing the position of the overflow channel. The bottom of the overflow channel, that is, the bottom end of the corresponding outer overflow port 103 (close to the end of the accommodating portion 101, if the outer overflow port 103 has a bottom edge, then its bottom end is the bottom edge) is the overflow cutoff point; when the inner overflow port 203 stops at an outer overflow port 103, the PPP above the bottom end of the outer overflow port 103 overflows to the overflow portion 104.

[0048] Graduations may be marked at each external overflow port 103 to indicate the remaining amount of plasma in the inner cavity. For example, if there are five external overflow ports 103, the scales corresponding to the five external overflow ports 103 from bottom to top are 2ml, 4ml, 6ml, 8ml, and 10ml, respectively. If the amount of blood injected is 20ml, the concentration multiples of the platelet-rich plasma corresponding to the five external overflow ports 103 from bottom to top are 10 times, 5 times, 3.3 times, 2.5 times, and 2 times, respectively; if the amount of blood injected is 30ml, if the overflow channels are at 4ml, 6ml, 8ml, and 10ml, respectively, the corresponding concentration multiples of the platelet-rich plasma are 7.5 times, 5 times, 3.75 times, and 3 times, respectively.

[0049] The shape of the external overflow port 103 may be a triangle, a quadrilateral, a pentagon, an ellipse or a circle, etc. Optionally, the shapes of the multiple external overflow ports 103 are the same, which is convenient for processing.

[0050] The cross-sectional areas of the multiple external overflow openings 103 may be the same or different. For example, the cross-sectional areas of the multiple external overflow openings 103 gradually increase from bottom to top or from top to bottom.

[0051] As an alternative, Figures 4 to 6 As shown, there is one external overflow port 103 , which spirally rises from bottom to top along the peripheral wall of the first component 102 ; there is one internal overflow port 203 , which extends along the height direction of the main tube 1 .

[0052] In this embodiment, a plurality of external overflow ports 103 are spirally wound on the outer peripheral wall of the first component 102 (the first component 102 is arranged in a cylindrical shape), and the overflow channel is surrounded by the upper and lower edges of the external overflow port 103 and the left and right edges of the internal overflow port 203, and the lower end of the overflow channel is the overflow cutoff point. By rotating the second component 202, the position of the internal overflow port 203 relative to the external overflow port 103 is changed, thereby changing the height of the bottom end of the overflow channel, and then changing the height of the liquid level, thereby adjusting the overflow amount of PPP, and then adjusting the concentration multiple of platelet-rich plasma.

[0053] Graduation lines can be set on the outer peripheral wall of the first component 102 at different heights of the outer overflow port 103 to indicate the remaining amount of plasma in the inner cavity, for example: 2ml, 4ml, 6ml, 8ml, and 10ml graduation lines are set from bottom to top. When the amount of blood injected is 30ml, the bottom end of the overflow channel is at the 10ml graduation line, and platelet-rich plasma with a concentration factor of 3 times is obtained; when the amount of blood injected is 30ml, the bottom end of the overflow channel is at the 5ml graduation line, and platelet-rich plasma with a concentration factor of 6 times is obtained; when the amount of blood injected is 30ml, the bottom end of the overflow channel is at the 3ml graduation line, and platelet-rich plasma with a concentration factor of 10 times is obtained.

[0054] It is easy to understand that at least part of the outer sleeve 106 (ie, the outer wall of the main tube 1) is made of transparent material (eg, plastic or glass, etc.), so that the staff can observe the changes in the liquid level in the inner cavity and the scale lines corresponding to the liquid level.

[0055] On the basis of the above embodiment, the main tube 1 further includes: a throat 105 and an outer sleeve 106; the throat 105 is connected between the accommodating portion 101 and the first component 102 (in the height direction of the main tube 1, from top to bottom, the first component 102, the throat 105 and the accommodating portion 101 are arranged in sequence); the outer sleeve 106 is arranged outside the first component 102 and the throat 105 to form an overflow portion 104; the upper cavity cover 201 is connected to the upper end of the outer sleeve 106.

[0056] In this embodiment, it can be understood that the cross-sectional area of ​​the throat 105 is respectively smaller than the cross-sectional area of ​​the first component 102 and the cross-sectional area of ​​the receiving portion 101. The stratified blood can be moved upward or downward by driving the extension component 3 to move upward or downward until the PRP layer is located in the throat 105, the red blood cell layer is located in the receiving portion 101, and the PPP layer is located in the first component 102, which makes it more convenient to extract the required liquid.

[0057] The main body tube 1 can be integrally formed.

[0058] Alternatively, the main body tube 1 is formed by assembly, wherein the first component 102, the throat 105 and the accommodating portion 101 are integrally formed, one end of the outer sleeve 106 is connected to the outer wall of the accommodating portion 101, there is a gap between the inner wall of the outer sleeve 106 and the outer wall of the first component 102 and between the outer sleeve 106 and the outer wall of the throat 105, and an overflow portion 104 is formed between the outer sleeve 106, the throat 105 and the first component 102. The upper end of the outer sleeve 106 is connected to the upper cavity cover 201.

[0059] A sealing structure 5 (for example, a sealing filling layer, a sealing ring, etc.) may be provided between the outer sleeve 106 and the upper cavity cover 201 to improve the sealing performance of the connection between the outer sleeve 106 and the upper cavity cover 201 .

[0060] Based on the above embodiment, the volumes of the first component 102 , the throat portion 105 and the accommodation portion 101 can be set as required.

[0061] Preferably, the ratio of the sum of the capacity of the cavity enclosed by the inner wall of the second component 202 and the inner wall of the first component 102 and the capacity of the throat 105 to the capacity of the accommodating portion 101 is 1:1.2-1:1 (for example: 1:1, 1:1.1 or 1:1.2, etc.), which is conducive to the distribution of the PPP layer, PRP layer and red blood cell layer in different cavities.

[0062] Based on the above embodiments, the structure of the pushing component 3 can be various, for example: the pushing component 3 includes a pushing block and a push-pull rod, the pushing block is slidably arranged in the accommodating portion 101, and the push-pull rod is connected to the end of the pushing block away from the throat 105, and the push block can be driven to move in the accommodating portion 101 by the push-pull rod.

[0063] As an alternative, Figure 2 and Figure 5 As shown, the extension assembly 3 includes: a piston 301 and a screw cap 304; along the height direction of the main tube 1, a plurality of annular protrusions 302 are spaced apart on the outer wall of the piston 301, and the annular protrusions 302 abut against the inner wall of the accommodating portion 101; the screw cap 304 is connected to the piston 301; and the screw cap 304 is connected to the accommodating portion 101 through threads.

[0064] In this embodiment, a groove is formed between two adjacent annular protrusions 302, and the combination of multiple annular protrusions 302 and multiple grooves can form a labyrinth seal to improve the sealing between the piston 301 and the receiving portion 101. The screw cap 304 is connected to the receiving portion 101 by threads, and the position of the screw cap 304 relative to the receiving portion 101 can be changed by rotating the screw cap 304, and the screw cap 304 can move up and down in the height direction of the receiving portion 101, thereby realizing the piston 301 to move up and down in the receiving portion 101 to change the position of the liquid level in the inner cavity. The push-out assembly 3 of this structure is compact, occupies a small space, has a reliable connection, and moves smoothly.

[0065] The rotary cover 304 may be connected to the piston 301 by fasteners such as bolts or screws.

[0066] As an alternative, Figure 2 and Figure 5As shown, a slot 303 is provided on the outer wall of the lower part of the piston 301; the extension assembly 3 also includes: a connecting plate 305 and a block 306; the connecting plate 305 is fixed to the bottom of the rotary cover 304; the block 306 is fixed to the connecting plate 305, and the block 306 is clamped in the slot 303; a slot is formed between the inner wall of the rotary cover 304, the connecting plate 305 and the block 306, the bottom opening of the accommodating portion 101 is set, and the lower end of the accommodating portion 101 is inserted into the slot.

[0067] In this embodiment, one side of the connecting plate 305 is connected to the bottom of the rotary cover 304, and the other side is connected to the clamping block 306, so that a gap is formed between the rotary cover 304 and the clamping block 306, so that the bottom of the receiving portion 101 can be inserted. This connection method of the rotary cover 304 and the piston 301 is simple in structure, easy to install, and has a regular and compact structure.

[0068] like Figure 2 As shown, the upper chamber cover 201 is provided with an injection suction port 4; the platelet-rich plasma preparation device further includes a PRP guide tube 6, one end of which is connected to the injection suction port 4, and the other end extends to the throat 105. The PRP guide tube 6 is provided to facilitate suction of the liquid in the inner cavity.

[0069] like Figure 1 and Figure 2 As shown, based on the above embodiment, further, a vent hole 7 is provided on the upper cavity cover 201, and a filter structure 8 is provided at the vent hole 7; the inner cavity surrounded by the first component 102 and the second component 202 and the overflow portion 104 are both connected to the vent hole 7.

[0070] In this embodiment, the inner cavity and the second cavity can be connected to the external environment through the vent hole 7, so as to achieve internal and external pressure balance; the filter structure 8 is provided to prevent bacteria from entering the inner cavity and the overflow part.

[0071] like Figure 1 and Figure 2 As shown, on the basis of the above embodiment, further, an overflow suction port 9 connected to the overflow part 104 is further provided on the upper chamber cover 201, and the PPP in the overflow part 104 can be sucked out through the overflow suction port 9, and a PPP guide tube can be arranged in the overflow part 104 to facilitate suction; the platelet-rich plasma preparation device also includes: a first plugging cover 10 and a second plugging cover 20, the first plugging cover 10 is installed at the injection suction port 4, and the second plugging cover 20 is installed outside the overflow suction port 9, so as to improve the sealing performance of the entire device.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; although the utility model is described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; 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 various embodiments of the utility model. In the description provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments instead of other features, the combination of features of different embodiments means being within the scope of the utility model and forming different embodiments.

Claims

1. A platelet-rich plasma preparation device, characterized in that: include: A main body tube, wherein a receiving portion, a first component connected to the receiving portion, and an overflow portion capable of communicating with the first component through an external overflow port provided on the first component are provided in the main body tube; An upper cavity, the upper cavity comprising an upper cavity cover and a second component disposed on the upper cavity cover, wherein the second component is movably disposed in the first component to open or close the external overflow port; The pushing assembly is movably arranged in the accommodating portion so as to be able to move up and down in the height direction of the main body tube.

2. The platelet-rich plasma preparation device according to claim 1, characterized in that: The second component is rotatably disposed within the first component; The second component is provided with an inner overflow port which can be communicated with the outer overflow port.

3. The platelet-rich plasma preparation device according to claim 2, characterized in that: In the circumferential direction of the first component, at least one external overflow port is provided on the first component, and at least one internal overflow port is provided on the second component.

4. The platelet-rich plasma preparation device according to claim 3, characterized in that: The number of the external overflow ports is multiple, and the multiple external overflow ports are arranged in a stepped manner on the peripheral wall of the first component; The number of the internal overflow port is one, and the internal overflow port extends along the height direction of the main body pipe.

5. The platelet-rich plasma preparation device according to claim 3, characterized in that: The number of the external overflow port is one, and the external overflow port rises spirally from bottom to top along the peripheral wall of the first component; The number of the internal overflow port is one, and the internal overflow port extends along the height direction of the main body pipe.

6. The platelet-rich plasma preparation device according to any one of claims 1 to 5, characterized in that: The main tube also includes: a throat portion, the throat portion communicating between the accommodation portion and the first component; An outer sleeve, the outer sleeve is sleeved outside the first component and the throat to form the overflow portion; The upper cavity cover is connected to the upper end of the outer sleeve.

7. The platelet-rich plasma preparation device according to claim 6, characterized in that: The ratio of the sum of the capacity of the cavity enclosed by the inner wall of the second component and the inner wall of the first component and the capacity of the throat to the capacity of the accommodating portion is 1:1.2-1:

1.

8. The platelet-rich plasma preparation device according to any one of claims 1 to 5, characterized in that: The extension assembly comprises: A piston, wherein a plurality of annular protrusions are provided on the outer wall of the piston at intervals along the height direction of the main body tube, and the annular protrusions abut against the inner wall of the accommodating portion; A screw cap is connected to the piston; the screw cap is connected to the accommodating portion via a thread.

9. The platelet-rich plasma preparation device according to claim 6, characterized in that: The upper cavity cover is provided with an injection suction port and an overflow suction port; The platelet-rich plasma preparation device also includes a PRP guide tube, one end of which is connected to the injection suction port, and the other end of which extends to the throat; the overflow suction port is connected to the overflow part.

10. The platelet-rich plasma preparation device according to claim 1, characterized in that: The upper cavity cover is provided with a vent hole, and a filtering structure is provided at the vent hole; An inner cavity surrounded by the inner wall of the first component, the inner wall of the second component and the inner wall of the accommodating portion and the overflow portion are both in communication with the vent hole.

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