Platelet-rich plasma separation device
By introducing a connecting rod and a break-off structure into the syringe, combined with a connecting key and a fixing plate, the problems of contamination and poor sealing of the syringe during centrifugation are solved, achieving efficient and safe separation and extraction of platelet-rich plasma.
Patent Information
- Application Number
- CN202423199947.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Existing syringes are prone to platelet-rich plasma contamination and poor sealing during centrifugation, and improper operation may lead to blood leakage.
A platelet-rich plasma separation device was designed. By incorporating a connecting rod, a break-off section, and a connecting key in the syringe, the piston is ensured to remain stable within the syringe, preventing misoperation and contamination. Furthermore, the connecting key and a fixing plate restrict piston sliding, thereby improving separation efficiency and quality.
This improved the extraction quality and efficiency of platelet-rich plasma, avoided sample contamination and leakage, and ensured the stability and safety of the separation process.
Smart Images
Figure CN223602057U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of blood equipment, and specifically relates to a platelet-rich plasma separation device. BACKGROUND
[0002] The Chinese full name of PRP is platelet-rich plasma, which is obtained by extracting a certain amount of venous blood, centrifuging and separating in vitro, and is a kind of plasma rich in platelets. The main components of PRP are platelets, white blood cells and fibronectin. After the activation of platelets, a large amount of growth factors and cytokines can be released. White blood cells have anti-infection function, and fibronectin can provide a cell scaffold. At present, PRP is more and more widely used in clinical practice, including orthopedics, ophthalmology and plastic and cosmetic surgery.
[0003] At present, platelet-rich plasma is prepared by first extracting blood with a syringe, then removing the push rod of the syringe, sealing the needle end, and then placing the syringe into the centrifuge basket for centrifugation to separate the blood into layers. The lowermost layer is red blood cells, and the upper layer is plasma. There is a white membrane layer between the plasma and the red blood cells. This white membrane layer and part of the upper layer of plasma are platelet-rich plasma. Finally, the white membrane layer and part of the upper layer of plasma are carefully sucked, and this part is PRP, which is transferred to another sterile container for standby.
[0004] However, when the ordinary syringe is directly used as a centrifuge tube, the original syringe push rod end is generally removed from the piston, and then a special push rod and piston connecting piece are connected to the piston. This operation process requires the piston and push rod of the syringe to be removed, and then the piston rubber part is reinstalled. On the one hand, it is easy to cause pollution, and on the other hand, the piston may be damaged, resulting in poor sealing of the syringe, and in severe cases, blood leakage during centrifugation. Another way is to first extract blood with a syringe, then break the rear part of the original push rod, and only leave a small part in the syringe tube. The disadvantage of this method is that the push rod needs to be broken after blood extraction, which may cause the push rod to come out of the tube and cause internal blood leakage if not handled properly.
[0005] Therefore, when the existing syringe is used as a centrifuge tube, the platelet-rich plasma is prone to contamination. UTILITY MODEL CONTENT
[0006] The utility model aims at providing a platelet-rich plasma separation device, solving the problem that the sample is easy to be contaminated during the separation of platelet-rich plasma, and improving the quality of extracting platelet-rich plasma.
[0007] The utility model realizes the above-mentioned purpose through the following technical scheme:
[0008] The utility model provides a kind of platelet-rich plasma separation device, including first syringe, the first syringe includes tube body, and the piston being arranged in tube body and being slidably connected with tube body, the first push rod is equipped on the side of the piston, the first push rod extends to the outside of tube body, and first push plate is equipped, the needle connecting portion is at the end of tube body away from first push plate, connecting rod is equipped between the first push rod and piston and is connected with piston, the end of connecting rod is equipped with breakage part connected with first push rod, the end of connecting rod is equipped with first through-hole, and second push rod and connecting key are further included, the end of second push rod is equipped with connecting block slidably connected with the end of connecting rod, second through-hole is equipped on the connecting block, the connecting key passes through first through-hole and second through-hole in sequence, and second push plate is arranged on the end of second push rod.
[0009] Further, the end of the piston is provided with a tapered block, and the needle connecting portion is tapered and parallel to the tapered block.
[0010] Further, the needle connecting portion occupies one-third to one-half of the volume of the tube body.
[0011] Further, the end of the tube body is provided with a fixed plate slidably connected with the connecting rod, the fixed plate is provided with a groove for the connecting rod to pass through, and the two sides of the groove are provided with third through-holes for the connecting key to pass through.
[0012] Further, one side of the fixed plate is in contact with one side of the tube body, and symmetrically provided with a screw rod, the tube body is provided with a fourth through-hole slidably connected with the screw rod, and the end of the screw rod is provided with a nut in contact with the other side of the tube body.
[0013] Further, the end of the connecting key is symmetrically provided with a limiting block, the two sides of the limiting block are respectively provided with an inclined surface and a flat surface in contact with the fixed plate, a return spring is provided between the two limiting blocks, and the end of the connecting key is provided with a protrusion in contact with the fixed plate.
[0014] Further, it further includes a second syringe and a medical tee connected with the first syringe and the second syringe.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] 1. After using the first syringe to extract the patient's blood, the breakage part between the first push rod and the connecting rod is broken, thereby retaining the connecting rod and the piston in the tube body. Compared with directly breaking the push rod, the operation is more convenient, and misoperation is less likely to occur. The piston is prevented from falling off the tube body, the collected sample is prevented from being contaminated by the outside world, and the quality of the extracted platelet-rich plasma is improved.
[0017] 2、After centrifugation is completed, the first syringe is taken out from the basket, then the connecting block provided at the end of the second push rod is corresponded with the connecting rod, the second push rod is moved at the end of the connecting rod, the second through hole provided on the connecting block is corresponded with the first through hole provided at the end of the connecting rod, then the connecting key is sequentially threaded through the first through hole and the second through hole, the resistance generated after the connecting key is contacted with the first through hole and the second through hole limits the movement of the connecting block relative to the connecting rod, the second push rod is fixed at the end of the connecting rod, the piston is facilitated to slide in the pipe body, the efficiency and quality of the separated platelet rich plasma are improved, the second push rod is subsequently pushed at the end of the pipe body, the piston is driven to slide on the pipe body, until the blood plasma, the platelet rich plasma and the red blood cells in the pipe body are sequentially pushed and ejected from the first syringe, so that the separation and extraction of the platelet rich plasma are realized, and the whole process of separating the platelet rich plasma, the platelet rich plasma does not need to be exposed to the outside, and thus the quality of the extracted platelet rich plasma is improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] FIG. 1 is a structural schematic view of the first syringe of the utility model. Figure 1 FIG. 2 is a structural schematic view of the second syringe of the utility model cooperating with the first syringe.
[0019] FIG. 3 is a structural schematic view of the first push rod of the utility model. Figure 2 FIG. 4 is a structural schematic view of the second push rod of the utility model.
[0020] Figure 3 FIG. 5 is a structural schematic view of the connecting rod of the utility model.
[0021] FIG. 6 is a structural schematic view of the connecting key of the utility model. Figure 4 FIG. 7 is a partial enlarged view of position A in the utility model. Figure 3 FIG. 8 is a structural schematic view of the fixed plate of the utility model.
[0022] Figure 5 FIG. 9 is a partial enlarged view of position B in the utility model.
[0023] FIG. 10 is a structural schematic view of the screw rod of the utility model. Figure 6 Figure 5 FIG. 11 is a partial enlarged view of position C in the utility model.
[0024] FIG. 12 is a structural schematic view of the connecting rod of the utility model. Figure 7 FIG. 13 is a structural schematic view of the connecting key of the utility model.
[0025] Markings shown in the drawings:
[0026] 1, the first syringe; 2, the tube; 3, the piston; 4, the first push rod; 5, the first push plate; 6, the needle connecting part; 7, the connecting rod; 8, the broken part; 9, the first through hole; 10, the second push rod; 11, the connecting key; 12, the connecting block; 13, the second through hole; 14, the second push plate; 15, the tapered block; 16, the fixed plate; 17, the groove; 18, the third through hole; 19, the screw; 20, the fourth through hole; 21, the nut; 22, the limiting block; 23, the inclined surface; 24, the plane; 25, the return spring; 26, the protrusion; 27, the second syringe; 28, the medical tee. DETAILED DESCRIPTION
[0027] The utility model will be further explained in combination with specific embodiments. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the present application.
[0028] A platelet-rich plasma separation device, as shown in Figures 1-4 It comprises a first syringe 1, the first syringe 1 includes a tube 2 and a piston 3 arranged in the tube 2 and slidably connected with the tube 2, one side of the piston 3 is provided with a first push rod 4, the first push rod 4 extends to the outside of the tube 2 and is provided with a first push plate 5, the end of the tube 2 away from the first push plate 5 is a needle connecting part 6, the first push rod 4 and the piston 3 are provided with a connecting rod 7 connected with the piston 3, the end of the connecting rod 7 is provided with a broken part 8 connected with the first push rod 4, after the first syringe 1 is used to extract the blood of a patient, the broken part 8 arranged between the first push rod 4 and the connecting rod 7 is broken, so as to retain the connecting rod 7 and the piston 3 in the tube 2, compared with directly breaking the push rod, the operation is more convenient, and misoperation is not easy to occur, the piston 3 is avoided from falling off from the tube 2, the collected sample is avoided from being polluted by the outside, and the quality of extracted platelet-rich plasma is improved;
[0029] The end of the connecting rod 7 is provided with a first through hole 9, further comprising a second push rod 10 and a connecting key 11, the end of the second push rod 10 is provided with a connecting block 12 which is slidingly connected with the end of the connecting rod 7, the connecting block 12 is provided with a second through hole 13, the connecting key 11 passes through the first through hole 9 and the second through hole 13 in sequence, the end of the second push rod 10 is provided with a second push plate 14, the first syringe 1 is placed in the basket of the centrifuge, the sample is centrifuged, the blood is stratified, and the subsequent extraction of platelet-rich plasma is facilitated; after the centrifugation is completed, the first syringe 1 is taken out of the basket, then the connecting block 12 provided at the end of the second push rod 10 corresponds to the connecting rod 7, the second push rod 10 is moved at the end of the connecting rod 7, the second through hole 13 provided on the connecting block 12 corresponds to the first through hole 9 provided at the end of the connecting rod 7, then the connecting key 11 passes through the first through hole 9 and the second through hole 13 in sequence, the resistance generated after the connecting key 11 contacts with the first through hole 9 and the second through hole 13 limits the movement of the connecting block 12 relative to the connecting rod 7, the second push rod 10 is fixed at the end of the connecting rod 7, the sliding of the piston 3 in the pipe body 2 is facilitated, the efficiency and quality of the separation of platelet-rich plasma are improved, the subsequent sliding of the piston 3 in the pipe body 2 is driven by the pushing of the second push rod 10 at the end of the pipe body 2, until the blood plasma, platelet-rich plasma and red blood cells in the pipe body 2 are sequentially pushed and ejected from the first syringe 1, so as to realize the separation and extraction of platelet-rich plasma, and the whole process of separating platelet-rich plasma, the platelet-rich plasma does not need to be exposed to the outside, thereby improving the quality of the extraction of platelet-rich plasma; in addition, the connecting key 11 and the second push rod 10 can be replaced individually regardless of damage, without the need to replace them together, thereby reducing the cost of subsequent replacement of the vulnerable parts.
[0030] Preferably, as shown in Figure 2 , Figure 3 and Figure 5 , the end of the piston 3 is provided with a tapered block 15, the needle connecting part 6 is tapered and parallel to the tapered block 15, so that the sample is more easily stratified due to the density difference during centrifugation, and under the action of centrifugal force, the red blood cells with large density will sink to the tapered part at the bottom of the syringe, the white blood cells and platelets are in the middle layer, and the plasma is in the uppermost layer, which is conducive to the subsequent extraction of PRP; in addition, when the tapered block 15 pushes the blood in the pipe body 2 out, the structure of the tapered block 15 makes the force acting on the blood in the middle and edge more uniform, avoiding the occurrence of wall hanging phenomenon, and when the white blood cells and platelets in the middle layer move to the needle connecting part 6, the white blood cells and platelets gradually gather in the middle, and as the diameter of the pipe body 2 gradually decreases, the overall height of the white blood cells and platelets becomes higher due to the unchanged overall volume of the white blood cells and platelets, which is convenient for doctors to observe and further improves the quality of the extraction of platelet-rich plasma.
[0031] Preferably, as shown in Figure 2 , Figure 3 andFigure 5 As shown, the needle connecting part 6 occupies one third to one half of the volume of the tube 2, so that the overall height of the collected white blood cell and platelet layer is more obvious, facilitating subsequent separation of platelet-rich plasma.
[0032] Preferably, as shown in Figure 5 and Figure 6 The end of the tube 2 is provided with a fixed plate 16 in sliding connection with the connecting rod 7, the fixed plate 16 is provided with a groove 17 for the connecting rod 7 to pass through, the groove 17 is provided with a third through hole 18 on both sides for the connecting key 11 to pass through. After breaking the connecting rod 7 and the first push rod 4, place the fixed plate 16 at the end of the tube 2, let the connecting rod 7 pass through the groove 17 provided on the fixed plate 16, so that the third through hole 18 provided on both sides of the groove 17 corresponds to the first through hole 9 provided at the end of the connecting rod 7, then move the connecting key 11, make it pass through the third through hole 18 on one side of the groove 17, the first through hole 9 provided at the end of the connecting rod 7, and the third through hole 18 on the other side of the groove 17 in turn, and realize the fixation of the fixed plate 16 and the connecting rod 7 through the resistance generated by the contact between the connecting key 11 and the connecting rod 7 and the fixed plate 16, so as to limit the sliding of the piston 3 provided at the end of the connecting rod 7 on the tube 2, avoid the movement of the piston 3 caused by external force during centrifugation, causing the sample stored in the first syringe 1 to flow out of the needle connecting part 6, and thus improve the quality of extracting platelet-rich plasma.
[0033] Preferably, as shown in Figure 5 and Figure 7 One side of the fixed plate 16 is in contact with one side of the tube 2, and is symmetrically provided with a screw rod 19, the tube 2 is provided with a fourth through hole 20 in sliding connection with the screw rod 19, the end of the screw rod 19 is provided with a nut 21, and is in contact with the other side of the tube 2. Move the fixed plate 16, make the screw rod 19 provided on one side of the fixed plate 16 pass through the corresponding fourth through hole 20, and let one side of the fixed plate 16 contact one side of the tube 2, then fix the connecting rod 7 on the fixed plate 16, rotate the nut 21 on the screw rod 19, make it contact the other side of the tube 2, so as to fix the fixed plate 16 on the tube 2, and limit the sliding of the piston 3 on the tube 2, avoid the movement of the piston 3 caused by external force during centrifugation, causing the sample stored in the first syringe 1 to flow out of the needle connecting part 6, and thus improve the quality of extracting platelet-rich plasma.
[0034] Preferably, as shown in Figure 5 and Figure 6As shown, the end of the connecting key 11 is symmetrically provided with a limiting block 22, the two sides of the limiting block 22 are respectively provided with an inclined surface 23 and a plane 24 in contact with the fixed plate 16, a reset spring 25 is arranged between the two limiting blocks 22, and the end of the connecting key 11 is provided with a protrusion 26 in contact with the fixed plate 16, when the connecting rod 7 and the fixed plate 16 need to be connected, the connecting key 11 is moved to sequentially pass through the third through hole 18 on one side of the groove 17, the first through hole 9 arranged at the end of the connecting rod 7, and the third through hole 18 on the other side of the groove 17, at the same time, the inclined surface 23 is in contact with the fixed plate 16, a resulting force drives the two limiting blocks 22 to move towards the inside and compress the reset spring 25, until the limiting block 22 completely passes through the fixed plate 16, and under the action of the elastic force of the reset spring 25, the limiting block 22 is reset, so that the plane 24 arranged on one side thereof is in contact with one side of the fixed plate 16, and the protrusion 26 arranged at the end of the connecting key 11 is also in contact with the other side of the fixed plate 16, so that the connecting key 11 is fixed on the fixed plate 16, external force is avoided from inadvertently moving the connecting key 11 on the fixed plate 16, the stability of the overall structure is ensured, the sample stored in the first syringe 1 is avoided from flowing out of the needle connecting part 6, and the quality of the extracted platelet-rich plasma is improved.
[0035] Preferably, as Figure 1 As shown, the device further comprises a second syringe 27 and a medical tee 28 connected with the first syringe 1 and the second syringe 27, the first syringe 1 and the second syringe 27 are connected with the medical tee 28 through the connecting rod 7 interface, and the other interface is connected with a transfusion tube, the end of the transfusion tube is connected with the damaged part of the patient, first, the valve handle on the medical tee 28 is rotated, so that the first syringe 1 is connected with the second syringe 27, and the interface connected with the transfusion tube is in a closed state, the second push rod 10 is moved to push the piston 3 to slide in the tube body 2, the blood in the first syringe 1 is driven to slide in the tube body 2, so that the plasma in the upper layer is first flowed out of the needle connecting part 6 and enters the second syringe 27 through the medical tee 28, until the platelet-rich plasma in the middle layer moves to the needle connecting part 6, then the valve handle on the medical tee 28 is rotated, so that the first syringe 1 is connected with the transfusion tube, and the interface connected with the second syringe 27 is in a closed state, the second push rod 10 is moved again to drive the platelet-rich plasma to flow out of the needle connecting part 6 and enter the damaged part of the patient through the medical tee 28 and the transfusion tube, so as to treat the patient, at the same time, the platelet-rich plasma is not exposed to the outside during the whole process, the platelet-rich plasma is avoided from being polluted, and the quality of the extracted platelet-rich plasma and the treatment effect on the patient are improved.
[0036] Embodiment 1
[0037] The utility model provides a kind of platelet-rich plasma separation device, as Figures 1-4As shown, first, the blood of the patient is extracted by using the first syringe 1, then the breakage part 8 between the first push rod 4 and the connecting rod 7 is broken, so as to keep the connecting rod 7 and the piston 3 in the tube body 2. Compared with directly breaking the push rod, the operation is more convenient, and misoperation is less likely to occur, avoiding the piston 3 from falling off the tube body 2, so as to avoid the collected sample from being polluted by the outside world, and further improve the quality of the extracted platelet-rich plasma;
[0038] Then, the first syringe 1 is placed in the basket of the centrifuge, and the sample is centrifuged to stratify the blood, so as to facilitate the subsequent extraction of platelet-rich plasma. After centrifugation, the first syringe 1 is taken out of the basket, then the connecting block 12 provided at the end of the second push rod 10 corresponds to the connecting rod 7, the second push rod 10 is moved at the end of the connecting rod 7, so that the second through hole 13 provided on the connecting block 12 corresponds to the first through hole 9 provided at the end of the connecting rod 7, then the connecting key 11 is sequentially inserted through the first through hole 9 and the second through hole 13, and the resistance generated by the contact between the connecting key 11 and the first through hole 9 and the second through hole 13 limits the movement of the connecting block 12 relative to the connecting rod 7, so as to fix the second push rod 10 at the end of the connecting rod 7, facilitate the sliding of the piston 3 in the tube body 2, and improve the efficiency and quality of the separation of platelet-rich plasma. Subsequently, the second push rod 10 is pushed at the end of the tube body 2 to drive the piston 3 to slide on the tube body 2, until the blood plasma, platelet-rich plasma, and red blood cells in the tube body 2 are sequentially pushed out of the first syringe 1, so as to realize the separation and extraction of platelet-rich plasma. At the same time, during the whole process of separating platelet-rich plasma, the platelet-rich plasma does not need to be exposed to the outside world, thereby improving the quality of the extracted platelet-rich plasma.
[0039] Example 2
[0040] Based on Example 1, as Figure 5 , Figure 6 and Figure 7As shown, after the blood is extracted, the breakable part 8 between the connecting rod 7 and the first push rod 4 is broken, the fixing plate 16 is placed at the end of the tube body 2, the screw rod 19 provided on one side of the fixing plate 16 penetrates through the corresponding fourth through hole 20, and the fixing plate 16 is moved until the one side of the fixing plate 16 is in contact with the one side of the tube body 2, at the same time, the connecting rod 7 penetrates through the groove 17 provided on the fixing plate 16, the connecting rod 7 is moved away from the needle connecting part 6, so that the third through hole 18 provided on both sides of the groove 17 corresponds to the first through hole 9 provided at the end of the connecting rod 7, then the connecting key 11 is moved to penetrate through the third through hole 18 on one side of the groove 17, the first through hole 9 provided at the end of the connecting rod 7, and the third through hole 18 on the other side of the groove 17, at the same time, the connecting key 11 is in contact with the fixing plate 16 through the inclined surface 23, the resulting component force drives the two limiting blocks 22 to move towards the inside, and the return spring 25 is compressed, until the limiting blocks 22 completely pass through the fixing plate 16, and under the action of the elastic force of the return spring 25, the limiting blocks 22 are reset, so that the flat surface 24 provided on one side of the limiting blocks 22 is in contact with the one side of the fixing plate 16, at the same time, the protrusion 26 provided at the end of the connecting key 11 is also in contact with the other side of the fixing plate 16, so as to fix the connecting key 11 on the fixing plate 16, avoid the connecting key 11 from moving on the fixing plate 16 by external force, ensure the stability of the overall structure, avoid the sample stored in the first syringe 1 from flowing out of the needle connecting part 6, and further improve the quality of extracting platelet-rich plasma; in addition, the resistance generated after the connecting key 11 is in contact with the connecting rod 7 and the fixing plate 16 realizes the fixation of the fixing plate 16 and the connecting rod 7, so as to limit the piston 3 provided at the end of the connecting rod 7 from sliding on the tube body 2, then the nut 21 on the screw rod 19 is rotated to be in contact with the other side of the tube body 2, so as to fix the fixing plate 16 on the tube body 2 and limit the piston 3 from sliding on the tube body 2, avoid the piston 3 from moving by external force during the centrifugal process, causing the sample stored in the first syringe 1 to flow out of the needle connecting part 6, and further improve the quality of extracting platelet-rich plasma.
[0041] Example 3
[0042] On the basis of Example 1, as Figure 2 , Figure 3 and Figure 5As shown, since the end of the piston 3 is provided with the tapered block 15, and the needle connecting part 6 is tapered and parallel to the tapered block 15, the sample is more easily stratified due to the density difference during the centrifugation, and under the action of the centrifugal force, the red blood cells with large density will sink to the tapered part at the bottom of the syringe, the white blood cells and platelets are in the middle layer, and the plasma is in the uppermost layer, which is beneficial to the subsequent extraction of PRP; in addition, when the tapered block 15 pushes the blood in the pipe body 2 out, the structure of the tapered block 15 makes the force on the blood in the middle and the edge more uniform, avoiding the wall hanging phenomenon, and when the white blood cells and platelets in the middle layer move to the needle connecting part 6, the white blood cells and platelets gradually gather in the middle, and as the diameter of the pipe body 2 gradually decreases, the overall height becomes higher due to the unchanged volume of the white blood cells and platelets, which is convenient for doctors to observe and further improves the quality of the extracted platelet-rich plasma; in addition, the needle connecting part 6 occupies one-third to one-half of the volume of the pipe body 2, so that the overall height of the white blood cell and platelet layer after gathering is more obvious, which is convenient for subsequent separation of platelet-rich plasma.
[0043] Example 4
[0044] Based on example 1, as shown in Figure 1 after centrifugation, the second push rod 10 is installed at the end of the connecting rod 7, then the valve handle on the medical tee 28 is rotated, so that the first syringe 1 is communicated with the second syringe 27, and the interface communicated with the infusion tube is in a closed state, the second push rod 10 is moved to push the piston 3 to slide in the pipe body 2, driving the blood in the first syringe 1 to slide in the pipe body 2, so that the plasma in the upper layer flows out from the needle connecting part 6 first, and enters the second syringe 27 through the medical tee 28, until the platelet-rich plasma in the middle layer moves to the needle connecting part 6, then the valve handle on the medical tee 28 is rotated, so that the first syringe 1 is communicated with the infusion tube, and the interface communicated with the second syringe 27 is in a closed state, the second push rod 10 is pushed again to drive the platelet-rich plasma to flow out from the needle connecting part 6, and enter the patient's damaged part through the medical tee 28 and the infusion tube, so as to treat the patient, and at the same time the platelet-rich plasma is not exposed to the outside during the whole process, avoiding the contamination of the platelet-rich plasma, and further improving the quality of the extracted platelet-rich plasma and the effect of treating the patient.
Claims
1. A platelet-rich plasma separation device, comprising a first syringe (1), the first syringe (1) comprising a barrel (2) and a piston (3) arranged in sliding connection with the barrel (2) in the barrel (2), one side of the piston (3) being provided with a first push rod (4) extending to the outside of the barrel (2) and provided with a first push plate (5), the end of the barrel (2) away from the first push plate (5) being a needle connecting portion (6), characterized in that: The first push rod (4) and the piston (3) are provided with a connecting rod (7) connected with the piston (3), the end of the connecting rod (7) is provided with a broken part (8) connected with the first push rod (4), the end of the connecting rod (7) is provided with a first through hole (9), further comprising a second push rod (10) and a connecting key (11), the end of the second push rod (10) is provided with a connecting block (12) slidingly connected with the end of the connecting rod (7), the connecting block (12) is provided with a second through hole (13), the connecting key (11) passes through the first through hole (9) and the second through hole (13) in sequence, the end of the second push rod (10) is provided with a second push plate (14).
2. The platelet rich plasma separation device of claim 1, wherein: The end of the piston (3) is provided with a tapered block (15), the needle connecting part (6) is tapered and parallel to the tapered block (15).
3. The platelet rich plasma separation device of claim 1, wherein: The needle connecting part (6) occupies one third to one half of the volume of the pipe body (2).
4. The platelet rich plasma separation device of claim 1, wherein: The end of the pipe body (2) is provided with a fixed plate (16) slidingly connected with the connecting rod (7), the fixed plate (16) is provided with a groove (17) for the connecting rod (7) to pass through, the two sides of the groove (17) are respectively provided with a third through hole (18) for the connecting key (11) to pass through.
5. The platelet rich plasma separation device of claim 4, wherein: One side of the fixed plate (16) is in contact with one side of the pipe body (2), and symmetrically provided with a screw rod (19), the pipe body (2) is provided with a fourth through hole (20) slidingly connected with the screw rod (19), the end of the screw rod (19) is provided with a nut (21) in contact with the other side of the pipe body (2).
6. The platelet rich plasma separation device of claim 4, wherein: The end of the connecting key (11) is symmetrically provided with a limiting block (22), the two sides of the limiting block (22) are respectively provided with an inclined surface (23) and a flat surface (24) in contact with the fixed plate (16), a reset spring (25) is arranged between the two limiting blocks (22), the end of the connecting key (11) is provided with a protrusion (26) in contact with the fixed plate (16).
7. The platelet rich plasma separation device of claim 1, wherein: Further comprising a second syringe (27), and a medical tee (28) connected with the first syringe (1) and the second syringe (27).