Special instrument for PRP blood drawing centrifugation

Abstract

The utility model discloses a special appliance for PRP blood drawing centrifugation, which comprises an injector body, a notch is arranged on the tube wall of the injector body, a flexible sealing plug is hermetically connected to the notch, the inner layer of the flexible sealing plug is in smooth transition with the tube wall of the injector, and the flexible sealing plug forms a channel for drawing PRP. The notches extend in the length direction of the injector body and are in a long strip shape or a sawtooth shape or an arc shape along the tube wall. The notch is located at the one-third position of the middle of the injector body. Blood does not need to be injected into a test tube for centrifugation after blood drawing, and cross infection caused by repeated instrument transfer is avoided; after centrifugation, the blood is divided into an upper layer PPP which does not contain platelets and repair factors, a lower layer is red blood cells, and a middle layer is platelet rich plasma PRP; the flexible sealing plug is arranged in the middle of the device, and after disinfection, the syringe is directly punctured through the flexible sealing plug, so that targeted PRP extraction is more accurate and more time-saving.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a special device for PRP blood drawing and centrifugation. Background Art

[0002] Platelet-rich plasma (PRP) is a platelet concentrate obtained by centrifuging autologous whole blood, and its platelet concentration is at least twice higher than the baseline concentration. PRP contains a large number of growth factors and proteins. Platelet-rich plasma is the plasma rich in high-concentration platelets obtained by centrifuging the whole blood of animals or humans. After adding thrombin to it, it can become a jelly-like substance, so it is also called platelet-rich gel or platelet-rich leucocyte gel (PLG). PRP contains a large number of growth factors such as platelet-derived growth factor (PDGF), transforming growth factor-β (TGF-β), insulin-like growth factor (IGF-1), etc.

[0003] At present, there is no unified standard for the preparation method of PRP. Its preparation mainly has two methods: density gradient centrifugation method and plasma separation and replacement method. The density gradient centrifugation method separates and extracts PRP from whole blood according to the different sedimentation coefficients of each component in the blood. Nowadays, the secondary centrifugation method is generally adopted. However, the platelet concentration and activity in the PRP prepared by different centrifugal forces and centrifugation times are different. The plasma separation and replacement method uses a medical blood component separation device to separate whole blood into components such as platelet plasma and concentrated platelets. This method is mainly applied to the collection of blood bank platelets and clinical component transfusion.

[0004] At present, during the preparation of PRP, blood needs to be transferred multiple times: use a syringe to draw blood, inject the drawn blood into a centrifugation device for centrifugation, and extract PRP from the centrifugation device after centrifugation; multiple transfers increase the risk of PRP being contaminated. Content of the Utility Model

[0005] The utility model provides a special device for PRP blood drawing and centrifugation, aiming to reduce the number of blood transfers to reduce the risk of PRP being contaminated.

[0006] To this end, the utility model adopts the following technical solutions:

[0007] A special device for PRP blood drawing and centrifugation, the special device includes a syringe body. A notch is opened on the tube wall of the syringe body, and a flexible sealing plug is hermetically connected at the notch. The inner layer of the flexible sealing plug is smoothly transitioned with the syringe tube wall, and the flexible sealing plug forms a channel for extracting PRP.

[0008] Furthermore, the notch extends along the length direction of the syringe body, and the notch is in a strip shape, a serrated shape or an arc shape along the tube wall.

[0009] Furthermore, the notch is located at one-third of the middle part of the syringe body.

[0010] Furthermore, the flexible sealing plug is made of medical rubber, medical silica gel, medical TPE material, or medical PVC material.

[0011] Furthermore, the position of the notch is directly opposite to the position of the scale line on the syringe body.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. After blood collection, there is no need to inject the blood into a test tube for centrifugation, avoiding cross-infection caused by repeated transfer of instruments.

[0014] 2. After centrifugation, the blood is divided into upper PPP without platelets and repair factors, lower layer is red blood cells, and the middle layer is platelet-rich plasma PRP; the middle of this device is a flexible sealing plug, and after disinfection, it can directly pierce the flexible sealing plug to target and extract PRP into the syringe, which is more accurate and time-saving.

[0015] 3. Directly extract PRP from the middle of the syringe without connecting a three-way joint; saving the cost of the three-way joint and reducing iatrogenic infections caused by multiple operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the main structural view of the present utility model;

[0017] Figure 2 is the side structural view of the present utility model;

[0018] In the figure: 1 - syringe body, 2 - flexible sealing plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the present utility model in conjunction with the drawings and specific embodiments:

[0020] As Figure 1 and 2 shown, a special instrument for PRP blood collection and centrifugation includes a syringe body 1. A notch is provided on the tube wall of the syringe body 1. The notch extends along the length direction of the syringe body 1. The notch is in a long strip shape, serrated shape, or arc shape along the tube wall. The notch is located at one-third of the middle part of the syringe body 1, and the position of the notch is directly opposite to the position of the scale line on the syringe body 1. A flexible sealing plug 2 is hermetically connected at the notch. The inner layer of the flexible sealing plug 2 is smoothly transitioned with the syringe tube wall. The flexible sealing plug 2 forms a channel for extracting PRP. The flexible sealing plug 2 is made of medical rubber, medical silica gel, medical TPE material, or medical PVC material.

[0021] The usage method of the present utility model is as follows:

[0022] After using the syringe of the present utility model to draw blood, place the syringe in a centrifuge for centrifugation. After centrifugation, the blood is divided into three layers. The upper layer is PPP without platelets and repair factors, the lower layer is red blood cells, and the middle layer is platelet-rich plasma PRP. Use a stopper to block the head end of the syringe body 1, and take another syringe. Insert the needle through the flexible seal 2 into the syringe body 1. While pressing the tail handle of the syringe body 1, draw out the PRP in the middle layer.

[0023] 1. After blood drawing, there is no need to inject the blood into a test tube for centrifugation, avoiding cross-infection caused by repeated transfer of instruments.

[0024] 2. After centrifugation, the blood is divided into an upper layer of PPP without platelets and repair factors, a lower layer of red blood cells, and the middle layer is platelet-rich plasma PRP. The middle of this device is a flexible seal 2. After disinfection, directly pierce through the flexible seal 2 into the syringe to target and draw PRP more accurately and time-saving.

[0025] 3. Directly draw PRP from the middle of the syringe without connecting a three-way joint; saving the cost of the three-way and reducing iatrogenic infections caused by multiple operations.

Claims

1. A special instrument for PRP blood drawing and centrifugation, characterized in that: The special device comprises a syringe body, a tube wall of the syringe body is provided with a notch, a flexible sealing plug is sealedly connected at the notch, an inner layer of the flexible sealing plug smoothly transitions with the tube wall of the syringe, and the flexible sealing plug forms a channel for extracting PRP.

2. The PRP blood drawing centrifuge special device according to claim 1, characterized in that: The notch extends along the length direction of the syringe body, and the notch is in a strip shape, a sawtooth shape, or an arc shape along the tube wall.

3. The PRP blood drawing centrifuge device according to claim 1, characterized in that: The notch is located in the middle third of the syringe body.

4. The PRP blood drawing centrifuge device according to claim 1, characterized in that: The flexible sealing plug is made of medical rubber, medical silica gel, medical TPE material or medical PVC material.

5. The PRP blood drawing centrifuge device according to claim 1, characterized in that: The position of the notch is directly opposite to the position of the scale line of the syringe body.

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