Platelet-rich plasma preparation device adopting injector for sampling blood

Abstract

The utility model provides a platelet-rich plasma preparation device adopting an injector to collect blood, which comprises a centrifugal sleeve and an injector coaxially and detachably arranged in the centrifugal sleeve, the injector comprises a needle cylinder, a piston and a core rod, and the piston is detachably connected with the core rod. The platelet-rich plasma preparation device is simple in structure and easy to operate, the internal space of the centrifugal sleeve is saved, and the centrifugal sleeve of the same size can contain and centrifuge more blood.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a platelet-rich plasma preparation device which adopts a syringe to collect blood. 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 sampling device, which includes a syringe arranged in a centrifugal sleeve, and the top of the syringe is directly connected to a hard needle; after blood is collected by the syringe, the entire syringe is placed in the centrifugal sleeve for centrifugation to achieve PRP stratification. The blood sampling device can reduce the contact with the blood sample, but has the following defects: after the blood collection is completed, the piston and the core rod of the syringe move backward, so that the overall length of the syringe becomes about twice as long as before, and the length requirement of the centrifugal sleeve is high, and the core rod occupies the internal space of the centrifugal sleeve, which naturally causes the blood collection space to be compressed; and during centrifugation, the syringe and the needle remain coaxially connected, and the existence of the needle also increases the length of the syringe to a certain extent, causing the blood collection space to be further compressed. Utility Model Content

[0004] The utility model aims to provide a platelet-rich plasma preparation device for blood sampling using a syringe, which is not only simple in structure and easy to operate, but also saves the internal space of a centrifugal sleeve, so that a centrifugal sleeve of the same size can accommodate and centrifuge more blood.

[0005] The technical solution to achieve the purpose of the utility model is: a platelet-rich plasma preparation device for blood collection using a syringe, comprising a centrifugal sleeve and a syringe coaxially detachably installed in the centrifugal sleeve, the syringe comprising a syringe barrel, a piston and a core rod, and the piston and the core rod are detachably connected.

[0006] After blood sampling is completed, the platelet-rich plasma preparation device of the utility model can remove the core rod from the piston for centrifugation to achieve platelet-rich plasma (abbreviated as: PRP) stratification, which saves the internal space of the centrifugal sleeve, so that the centrifugal sleeve of the same size can accommodate and centrifuge more blood. After blood sampling is completed, the syringe can be placed on the existing centrifuge for centrifugation, and no special centrifugal equipment is required; 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 venous puncture needle 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 it is necessary to spray the wound surface, 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.

[0007] Furthermore, the piston and the core rod are detachably connected by a threaded fitting structure. Furthermore, a piston connecting shaft is coaxially fixedly connected to the tail end of the piston, and an extension shaft is coaxially fixedly connected to the end of the piston connecting shaft away from the piston; a plurality of axial ribs are evenly spaced along the circumference of the extension shaft on the outer peripheral wall, and the end of the extension shaft away from the piston connecting shaft is threadedly fixedly connected to the front end of the core rod. Specifically, a threaded hole is axially opened on the end face of the extension shaft, and an external thread is provided on the outer peripheral wall of the front end of the core rod, and the front end of the core rod is inserted into the threaded hole and fixedly connected by the threaded fitting of the external thread and the threaded hole. Pull the core rod outward until the extension shaft just moves out of the syringe to complete blood collection. At this time, the piston is still in the syringe; one hand holds the outer wall of the extension shaft to fix it. Since the outer wall of the extension shaft is provided with axial ribs, the friction force can be increased, and the extension shaft is easily fixed. At the same time, the other hand holds the core rod and rotates it to one side so that the front end of the core rod is screwed out of the threaded hole of the extension shaft to achieve the removal of the core rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional structural diagram of the platelet-rich plasma preparation device of the utility model;

[0009] Figure 2 It is a three-dimensional structural diagram of the syringe of the utility model;

[0010] Figure 3 It is a schematic diagram of the assembly structure of the syringe of the utility model, wherein the dot-dashed line is the assembly line;

[0011] Figure 4 It is an axial cross-sectional structural diagram of the syringe of the utility model. DETAILED DESCRIPTION

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

[0013] Combination Figure 1 to Figure 4 A platelet-rich plasma preparation device for blood collection using a syringe includes a centrifugal sleeve 10 and a syringe 20 coaxially and detachably mounted in the centrifugal sleeve 10, wherein the syringe 20 includes a syringe barrel 21, a piston 22 and a core rod 23, and the piston 22 and the core rod 23 are detachably connected.

[0014] After the blood collection is completed, the core rod 23 is removed from the piston 22 for centrifugation, 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 an existing centrifuge for centrifugation without the need for supporting special centrifuge equipment.

[0015] After centrifugation is completed and the syringe 20 is taken out, the core rod 23 is reinstalled on the piston 22. If intravenous injection is required, a new medical disposable intravenous puncture needle assembly is replaced, the core rod 23 is pushed and the piston 22 is driven to discharge the layered material 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 spraying of the wound surface is required, the head end of the syringe 20 is directly aimed at the wound surface for spraying.

[0016] Further, combined with Figure 3 and Figure 4 The piston 22 and the core rod 23 are detachably connected through a threaded matching structure. Figure 3 and Figure 4 A piston connecting shaft 24 is coaxially fixedly connected to the rear end of the piston 22, and an extension shaft 25 is coaxially fixedly connected to the end of the piston connecting shaft 24 away from the piston 22; a plurality of axial ribs 251 are evenly spaced along the circumference of the extension shaft 25 on the outer peripheral wall, and the end of the extension shaft 25 away from the piston connecting shaft 24 is threadedly fixedly connected to the front end of the core rod 23. Specifically, in combination with Figure 3 and Figure 4 The end surface of the extension shaft 25 is axially provided with a threaded hole 252, and the outer peripheral wall of the front end of the core rod 23 is provided with an external thread 230. The front end of the core rod 23 is inserted into the threaded hole 230 and is fixedly connected by the external thread 230 and the threaded hole (such as Figure 4As shown). Pull the core rod 23 outward until the extension shaft 25 just moves out of the syringe 21 to complete blood collection. At this time, the piston 22 is still located in the syringe 21; one hand holds the outer wall of the extension shaft 25 to fix it. Since the outer wall of the extension shaft 25 is provided with axial ribs 251, the friction force can be increased, and the extension shaft 25 is easily fixed. At the same time, the other hand holds the core rod 23 and rotates it to one side so that the front end of the core rod 23 is screwed out of the threaded hole 252 of the extension shaft 25 to remove the core rod 23.

[0017] 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 1 The centrifugal sleeve 10 may be provided with a cap structure at the open end thereof during centrifugation, so that the overall shape thereof is similar to that of an existing centrifuge tube, and is better adapted to an existing centrifuge. The syringe 20 may be detachably mounted in the centrifugal sleeve 10 by threaded engagement or direct contact engagement.

[0018] 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 for blood collection using a syringe, comprising a centrifugal sleeve and a syringe coaxially detachably mounted in the centrifugal sleeve, the syringe comprising a syringe barrel, a piston and a core rod, characterized in that: The piston is detachably connected to the core rod.

2. The platelet-rich plasma preparation device using a syringe for blood collection according to claim 1, characterized in that: The piston and the core rod are detachably connected via a threaded matching structure.

3. The platelet-rich plasma preparation device using a syringe for blood collection according to claim 2, characterized in that: A piston connecting shaft is coaxially fixedly connected to the tail end of the piston, and an extension shaft is coaxially fixedly connected to the end of the piston connecting shaft away from the piston; a plurality of axial ribs are evenly spaced along the circumference of the extension shaft on the outer peripheral wall, and the end of the extension shaft away from the piston connecting shaft is threadedly fixedly connected to the front end of the core rod.

4. The platelet-rich plasma preparation device using a syringe for blood collection according to claim 3, characterized in that: A threaded hole is axially opened on the end surface of the extension shaft, 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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