Platelet-rich plasma preparation device

Abstract

The utility model provides a platelet-rich plasma preparation device which comprises a centrifugal sleeve and a blood collecting tube coaxially and detachably arranged in the centrifugal sleeve, external threads are arranged on the outer circumferential wall of the blood collecting tube, and internal threads matched with the external threads are arranged on the inner circumferential wall of the centrifugal sleeve. The platelet-rich plasma preparation device is simple in structure, the injector can be prevented from shaking during centrifugation, and the centrifugal effect can be improved.

Description

Technical Field

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

[0002] Platelet-rich plasma (PRP) is a high-concentration platelet-rich plasma obtained by centrifuging whole blood. The platelet-rich concentration of PRP is 3 to 8 times that of ordinary plasma. In addition, PRP is rich in a variety of growth factors and other biologically active substances. These growth factors and active substances are the key to cell growth and play an important role in cell proliferation, migration and differentiation. In recent years, PRP has achieved good results in promoting tissue regeneration and repair in bone defects, skin wound treatment, plastic surgery, sports injury treatment, etc.

[0003] The Chinese patent with the authorization announcement number CN217852988U discloses a blood collection device, which includes a syringe arranged in a centrifugal sleeve, and a hard needle is directly installed on the top of the syringe; after blood is collected through the syringe, the entire syringe is axially inserted into the centrifugal sleeve and placed together in a centrifuge for centrifugation. The syringe can remain stable during the centrifugation process, which has a great impact on the PRP stratification. However, since the syringe of the blood collection device is axially inserted into the centrifugal sleeve, there will be an axial gap between the syringe and the centrifugal sleeve, which may be large or small, causing the syringe to shake easily during the centrifugation process, affecting the centrifugal effect. Utility Model Content

[0004] The utility model aims to provide a platelet-rich plasma preparation device, which has a simple structure and can avoid shaking of the syringe during centrifugation, thereby improving the centrifugal effect.

[0005] The technical solution to achieve the purpose of the utility model is: a platelet-rich plasma preparation device, including a centrifugal sleeve and a blood collection tube coaxially and detachably installed in the centrifugal sleeve, the blood collection tube is provided with an external thread on the outer peripheral wall, and the inner peripheral wall of the centrifugal sleeve is provided with an internal thread that cooperates with the external thread.

[0006] The external thread of the blood collecting tube of the utility model cooperates with the internal thread of the centrifugal sleeve to realize the detachable connection of the blood collecting tube. The blood collecting tube can be removed from the centrifugal sleeve for blood collection. After the blood collection is completed, the blood collecting tube is loaded into the centrifugal sleeve for centrifugation to realize the stratification of platelet-rich plasma (abbreviated as: PRP), thereby realizing the integrated assembly of the blood collecting tube and the centrifugal sleeve; and, by holding the blood collecting tube and rotating the centrifugal sleeve, the blood collecting tube can be separated or connected to the centrifugal sleeve. This design makes the connection between the blood collecting tube and the centrifugal sleeve tighter, prevents shaking during centrifugation, and is conducive to improving the centrifugal effect.

[0007] Furthermore, the blood collection tube is a syringe, which includes a syringe, a piston and a core rod. The head end of the syringe is connected to a venous puncture needle assembly, and only the outer peripheral wall of the tail of the syringe is provided with the outer thread, which is convenient for disassembling the blood collection tube. At the same time, a protrusion is provided on the outer peripheral wall of the piston, and a groove capable of engaging with the protrusion is provided on the inner peripheral wall of the tail of the syringe. When the piston moves toward the tail of the syringe, the protrusion can be inserted into the groove to fix the piston.

[0008] Furthermore, a piston connecting shaft is coaxially fixedly connected to the rear end of the piston, and the end of the piston connecting shaft away from the piston is threadedly matched and fixedly connected with the front end of the core rod. Specifically, a threaded hole is axially opened on the end surface of the piston connecting shaft, and an external thread is provided on the outer peripheral wall of the front end of the core rod. The front end of the core rod is inserted into the threaded hole and fixedly connected by threading the external thread with the threaded hole. Since the piston connecting shaft and the core rod are threadedly connected, after blood collection is completed, the core rod can be removed from the piston for centrifugation to achieve stratification of platelet-rich plasma (PRP for short), saving the internal space of the centrifuge sleeve, so that the centrifuge sleeve of the same size can accommodate and centrifuge more blood. After blood collection is completed, the syringe can be placed on the existing centrifuge for centrifugation without the need for special centrifuge equipment; and after centrifugation is completed and the syringe is taken out, the core rod can be reinstalled on the piston. If intravenous injection is required, a new medical disposable intravenous puncture needle assembly is replaced, the core rod is pushed and the piston is driven to discharge the stratified material above the PRP, and then the core rod and the piston are continued to be pushed, so that the PRP layer can act on the wound site; if spraying of the wound surface is required, the head end of the syringe is directly aimed at the wound surface for spraying, and the structural design is reasonable and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is an axial cross-sectional structural diagram of a platelet-rich plasma preparation device of the present invention;

[0010] Figure 2 is an enlarged view of part A in Figure 1;

[0011] FIG. 3 is a three-dimensional structural diagram of the syringe of the present invention. DETAILED DESCRIPTION

[0012] The specific implementation of the platelet-rich plasma preparation device of the utility model is described in detail below in conjunction with the accompanying drawings:

[0013] As shown in FIG1 , a platelet-rich plasma preparation device comprises a centrifugal sleeve 10 and a blood collection tube 20 coaxially and detachably mounted in the centrifugal sleeve 10 , wherein the blood collection tube 20 has an outer thread 200 on its outer peripheral wall, and an inner thread 100 cooperating with the outer thread 200 is provided on its inner peripheral wall.

[0014] The external thread 200 of the blood collection tube 20 of the utility model cooperates with the internal thread 100 of the centrifugal sleeve 10 to realize the detachable connection of the blood collection tube 20, and the blood collection tube 20 can be removed from the centrifugal sleeve 10 for blood collection. After the blood collection is completed, the blood collection tube 20 is loaded into the centrifugal sleeve 10 for centrifugation to realize the stratification of platelet-rich plasma (abbreviated as: PRP), thereby realizing the integrated assembly of the blood collection tube 20 and the centrifugal sleeve 10; and the blood collection tube 20 and the centrifugal sleeve 10 are connected by threaded cooperation. The blood collection tube 20 can be separated or connected to the centrifugal sleeve by holding the blood collection tube 20 and rotating the centrifugal sleeve 10. This design makes the blood collection tube 20 and the centrifugal sleeve 10 tightly combined to prevent shaking during centrifugation, which is beneficial to improving the centrifugal effect.

[0015] Further, in combination with FIG. 1 and FIG. 3 , the blood collection tube 20 is a syringe, and the syringe 20 includes a syringe 21 , a piston 22 and a core rod 23 , and the outer peripheral wall of the syringe 21 is provided with the outer thread 200 only at a position close to the tail end thereof;

[0016] The head end of the syringe 21 is connected to a venous puncture needle assembly 30; only the outer peripheral wall of the tail of the syringe 21 is provided with the outer thread 200, which is convenient for disassembling the blood collection tube 20. At the same time, as shown in FIG2 , a protrusion 211 is provided on the inner peripheral wall of the tail of the syringe 21, and a groove 221 capable of engaging with the protrusion 211 is provided on the outer peripheral wall of the piston 22. When the piston 22 moves toward the tail of the syringe, the protrusion 211 can be inserted into the groove 221, so that the piston 22 stops moving. Of course, the blood collection tube 21 of the utility model can be, but not limited to, a syringe, and it can also be an existing structure for collecting blood, such as a vacuum collection tube.

[0017] Furthermore, as shown in FIG1 , a piston connecting shaft 24 is coaxially fixedly connected to the rear end of the piston 22, and the end of the piston connecting shaft 24 away from the piston 22 is threadedly matched and fixedly connected with the front end of the core rod 23. Specifically, a threaded hole is axially opened on the end surface of the piston connecting shaft 24, and an external thread is provided on the outer peripheral wall of the front end of the core rod 23. The front end of the core rod 23 is inserted into the threaded hole and is threadedly matched with the threaded hole to achieve fixed connection. Since the piston connecting shaft 24 and the core rod 23 are threadedly connected, after the blood collection is completed, the core rod 23 can be removed from the piston 22 for centrifugation to achieve the stratification of platelet-rich plasma, which saves the internal space of the centrifuge sleeve 10, so that the centrifuge sleeve 10 of the same size can accommodate and centrifuge more blood. After the blood collection is completed, the syringe 20 can be placed on the existing centrifuge for centrifugation, and no special centrifuge equipment is required; and after the centrifugation is completed and the syringe 20 is taken out, the core rod 23 can be reinstalled on the piston 22. If intravenous injection is required, a new medical disposable intravenous puncture needle assembly 30 is replaced, the core rod 23 is pushed and the piston 22 is driven to discharge the stratified material located above the PRP, and then the core rod 23 and the piston 22 are continued to be pushed, so that the PRP layer can act on the wound site; if the wound surface needs to be sprayed, the head end of the syringe 20 is directly aimed at the wound surface for spraying, and the structural design is reasonable and easy to operate. Of course, the piston 22 and the core rod 23 may also be directly threadedly engaged.

[0018] In the specific implementation process, the centrifugal sleeve 10 of the utility model can be a sleeve structure with upper and lower openings (such as Figure 1During centrifugation, the open end of the centrifuge sleeve 10 may be covered with a cap structure to make its overall shape similar to that of an existing centrifuge tube and better adapt to an existing centrifuge.

[0019] For ordinary technicians in the technical field to which the utility model belongs, the utility model can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as falling within the protection scope of the utility model.

Claims

1. A platelet-rich plasma preparation device, comprising a centrifugal sleeve and a blood collection tube coaxially and detachably mounted in the centrifugal sleeve, characterized in that: The outer peripheral wall of the blood collection tube is provided with an external thread, and the inner peripheral wall of the centrifugal sleeve is provided with an internal thread that cooperates with the external thread.

2. The platelet-rich plasma preparation device according to claim 1, characterized in that: The blood collection tube is a syringe, which includes a syringe, a piston and a core rod. The head end of the syringe is connected to a venous puncture needle assembly, and only the outer peripheral wall of the tail of the syringe is provided with the external thread.

3. The platelet-rich plasma preparation device according to claim 2, characterized in that: A protrusion is provided on the outer peripheral wall of the piston, and a groove capable of engaging with the protrusion is provided on the inner peripheral wall of the tail of the syringe. The protrusion can be engaged in the groove when the piston moves toward the tail of the syringe.

4. The platelet-rich plasma preparation device according to claim 3, characterized in that: A piston connecting shaft is coaxially fixedly connected to the rear end of the piston, and the end of the piston connecting shaft facing away from the piston is fixedly connected with the front end of the core rod by threaded fitting.

5. The platelet-rich plasma preparation device according to claim 4, characterized in that: A threaded hole is axially opened on the end surface of the piston connecting shaft, and an external thread is provided on the outer peripheral wall of the front end of the core rod. The front end of the core rod is inserted into the threaded hole and fixedly connected with the threaded hole through the external thread and threaded cooperation.

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