Blood separation device for preparing PRP

Abstract

The utility model provides a blood separation device for preparing PRP (platelet rich plasma), which comprises a tube body, two ends of the tube body are respectively in threaded connection with an upper cover and a lower cover, the tube body is vertically arranged, and a filter is arranged at the upper end of the tube body and used for filtering red blood cells; a notch is formed in the pipe wall of the pipe body, and an adhesive tape is installed on the notch and used for blocking the notch so that PPP can be taken out; the lower cover is provided with a lower rubber plug used for taking out the PRP. Blood is injected from the upper cover; due to the fact that the tube body is vertically arranged, blood can fall down under the action of gravity, after the blood is filtered by the filter, red blood cells are left on the filter, and blood plasma without the red blood cells flows into an area below the filter. Then centrifugal separation is carried out, so that PPP and PRP are layered, a needle tube penetrates through an adhesive tape, and PPP is taken out; the needle tube penetrates through the lower rubber plug to take out the PRP; according to the utility model, PRP can be separated only through one-time centrifugal separation, so that the efficiency is high; the red blood cells are filtered by the filter, so that the filtering precision and efficiency are higher, and no red blood cells are left in the centrifugally separated plasma.

Description

Technical Field

[0001] The utility model relates to the technical field of blood separation devices, in particular to a blood separation device for preparing PRP. Background Art

[0002] Chinese patent CN104010672A discloses a blood separation device, which first removes red blood cells through a first centrifugation and then separates PRP through a second centrifugation.

[0003] The above device has the following shortcomings: 1. It needs to undergo two centrifugations to separate PRP, which is time-consuming and complicated; 2. After the first centrifugation, the volume of the lower space is adjusted by twisting the second cover so that all the red blood cells can fall into the lower space. This operation has low precision, or some red blood cells remain in the upper space, affecting the separation of PRP; or part of the plasma falls into the lower space, resulting in waste and reducing the amount of PRP separated. Utility Model Content

[0004] In order to solve the technical problems in the background technology, the utility model discloses a blood separation device for preparing PRP.

[0005] The utility model provides a blood separation device for preparing PRP, comprising a tube body, both ends of which are respectively threadedly connected with an upper cover and a lower cover, the tube body is arranged vertically, and a filter is arranged at the upper end thereof for filtering red blood cells;

[0006] The tube wall of the tube body is provided with a notch, and a rubber strip is installed on the notch to seal the notch for taking out PPP;

[0007] The lower cover is provided with a lower rubber plug for taking out PRP.

[0008] First, blood is injected from the upper cover; since the tube body is arranged vertically, the blood will fall under the action of gravity, and after being filtered by the filter, the red blood cells remain on the filter, and the plasma without the red blood cells flows into the area below the filter; then centrifugal separation is performed to separate PPP and PRP, and the needle tube passes through the rubber strip to take out PPP; the needle tube passes through the lower rubber plug to take out PRP; the utility model only needs one centrifugal separation to separate PRP, and the efficiency is high; and the red blood cells are filtered by the filter, the filtering accuracy and efficiency are higher, and no red blood cells will remain in the centrifuged plasma.

[0009] During centrifugal separation, plasma can easily impact the filter and penetrate the filter, resulting in the mixing of plasma and red blood cells. Based on this, further improvements are: a neck with a reduced diameter is provided on the upper part of the tube body, and a valve is installed on the neck to control the opening and closing of the upper and lower sides of the neck. During centrifugal separation, the valve is closed to separate the plasma from the filter; the setting of the neck can reduce the model and volume of the valve, thereby reducing the overall volume of the blood separation device, which is convenient for packaging and transportation.

[0010] In order to improve the installation speed and accuracy of the rubber strip, a further improvement is that: the outer side wall of the rubber strip is provided with a clamping groove and a clamping notch.

[0011] In order to avoid partial residue when PRP is taken out, a further design is as follows: the upper end surface of the lower rubber plug is arc-shaped; the distance between the upper end surface and the bottom of the lower cover increases from the center position to the edge position.

[0012] The filter is specifically hemodialysis paper.

[0013] In order to improve the filtering efficiency, a further design is that the hemodialysis paper is arranged in stacked multiple layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a front sectional view of the utility model;

[0016] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0017] In the figure: 1, tube body; 2, upper cover; 3, lower cover; 4, filter; 5, rubber strip; 6, lower rubber plug; 7, neck; 8, valve; 51, slot; 61, upper end face. DETAILED DESCRIPTION

[0018] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0019] like Figure 1 As shown, the utility model discloses a blood separation device for preparing PRP, including a tube body 1, with an upper cover 2 and a lower cover 3 respectively threadedly connected at both ends. An upper rubber plug is arranged in the upper cover 2, and a lower rubber plug 6 is arranged in the lower cover 3 to achieve sealing. The tube body 1 is arranged vertically, and a filter 4 is arranged at its upper end for filtering red blood cells. In this embodiment, the filter 4 adopts hemodialysis paper, which has a simple structure and low cost. In addition, the hemodialysis paper is arranged in multiple layers, which can improve the filtering efficiency.

[0020] A neck 7 with a narrowed opening is arranged near the top of the tube body 1, and the upper part of the neck 7 is V-shaped, and the lower part is inverted V-shaped. The filter 4 is installed above the neck 7. The neck 7 is provided with a valve 8 for controlling the opening and closing of the upper and lower ends of the neck 7.

[0021] The tube wall of the tube body 1 is provided with a notch, on which a rubber strip 5 is installed to seal the notch and fix the seal by welding. Figure 2 As shown, the outer side wall of the rubber strip 5 is provided with a clamping groove 51, which is engaged with the notch to realize the installation and positioning of the rubber strip 5, thereby improving its installation speed and position accuracy.

[0022] The operation steps are as follows: 1. Close valve 8; 2. Pass the needle through the upper rubber plug and inject blood from the upper cover 2 into the tube body 1; since the tube body 1 is arranged vertically, the blood will fall under the action of gravity, and after being filtered by the filter 4, the red blood cells remain on the filter 4, and the plasma without red blood cells flows into the area below the filter 4; 3. Close valve 8; 4. Perform centrifugal separation to separate PPP (platelet-poor plasma) and PRP (platelet-rich plasma); 5. Pass the needle through the rubber strip 5 to take out PPP; 6. Pass the needle through the lower rubber plug 6 to take out PRP; the utility model only needs one centrifugal separation to separate PRP, which is highly efficient; and the red blood cells are filtered through the filter 4, so the filtration accuracy and efficiency are higher, and no red blood cells will remain in the centrifuged plasma.

[0023] The valve 8 is provided to prevent the plasma from impacting the filter 4 during centrifugal separation, which may easily penetrate the filter 4 and cause the plasma to mix with the red blood cells.

[0024] The shape of the neck 7 can reduce the size of the valve 8 and the volume of the valve 8, thereby reducing the overall volume of the blood separation device and facilitating packaging and transportation.

[0025] The upper end surface 61 of the lower rubber plug 6 is arc-shaped; the distance between the upper end surface 61 and the bottom of the lower cover 3 increases from the center to the edge. In this way, PRP will accumulate at the bottom of the upper end surface 61, which is not only easy to remove, but also reduces the residual amount of PRP.

[0026] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A blood separation device for preparing PRP, comprising a tube body (1), with an upper cover (2) and a lower cover (3) respectively threadedly connected at both ends thereof, characterized in that: The tube body (1) is arranged vertically, and a filter (4) is provided at the upper end thereof for filtering red blood cells; The tube wall of the tube body (1) is provided with a notch, and a rubber strip (5) is installed on the notch to seal the notch for taking out the PPP; The lower cover (3) is provided with a lower rubber plug (6) for taking out the PRP.

2. The blood separation device for preparing PRP according to claim 1, characterized in that: The upper part of the tube body (1) is provided with a neck (7) with a reduced diameter, and a valve (8) is installed on the neck (7) for controlling the opening and closing of the upper and lower sides of the neck (7).

3. The blood separation device for preparing PRP according to claim 1, characterized in that: The outer side wall of the rubber strip (5) is provided with a clamping groove (51) which is clamped to the notch.

4. The blood separation device for preparing PRP according to claim 1, characterized in that: The upper end surface (61) of the lower rubber plug (6) is in an arc shape; The distance between the upper end surface (61) and the bottom of the lower cover (3) increases gradually from the center position to the edge position.

5. The blood separation device for preparing PRP according to claim 1, characterized in that: The filter (4) is hemodialysis paper.

6. The blood separation device for preparing PRP according to claim 5, characterized in that: The hemodialysis paper is provided as a stacked plurality of layers.

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