An extraction device for biocompatibility testing of medical devices

Abstract

The utility model discloses a kind of for medical instrument biocompatibility test's extraction device, including mutually coordinated extraction bottle and sealing cover, further including extraction plate, the extraction plate has multiple micropores for extraction liquid to pass, multiple limit rods are evenly provided in peripheral side, the inner wall of the extraction bottle is equipped with the limit slot compatible with the positioning rod, one end of the limit slot is flush with the bottle mouth of the extraction bottle to form assembly end, the edge side of the other end is equipped with positioning slot, and the limit rod is detachably inserted into the limit slot by the assembly end, and by twist into the positioning slot. The utility model is optimized to the structure of existing extraction bottle, and the position of floating sample is fixed using additional extraction plate when extracting floating sample to ensure that sample and extraction liquid are in full contact, guarantee the accuracy of test.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to an extraction device for biocompatibility testing of medical devices. Background Technology

[0002] In biocompatibility testing of medical devices, the stability of the extracted sample is one of the key factors affecting the test results. According to relevant standards (such as GB / T 16886.12-2023 Biological Evaluation of Medical Devices Part 12: Sample Preparation and Reference Materials), extract samples need to be prepared under specific conditions to ensure the accuracy and reliability of the test results. However, existing extraction bottles cannot effectively fix the floating sample during the extraction process, resulting in insufficient contact between the sample and the extract, which affects the accuracy and repeatability of the test. Utility Model Content

[0003] This invention provides an extraction device for biocompatibility testing of medical devices to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An extraction device for biocompatibility testing of medical devices includes an extraction bottle and a sealing cap that fit together, as well as an extraction plate. The extraction plate has multiple micropores for the extraction liquid to pass through, and multiple limiting rods are evenly arranged on its periphery. The inner wall of the extraction bottle has a limiting groove adapted to the limiting rods. One end of the limiting groove is flush with the mouth of the extraction bottle to form an assembly end, and the other end has a positioning groove on its side. The limiting rods are detachably inserted into the limiting groove through the assembly end and are fixed in position by twisting into the positioning groove, thereby ensuring that the sample is in full contact with the extraction liquid.

[0006] Preferably, the extraction plate is also provided with a fixing rod on one side of the bottom of the extraction bottle, and a converging plate is provided on the fixing rod. The side of the converging plate corresponding to the bottom of the extraction bottle is spherical, and there is a gap between the periphery and the bottle wall of the extraction bottle. By folding, a converging groove is formed with the periphery of the spherical surface, reducing the probability of sample clogging the micropores.

[0007] Preferably, the top of the extraction plate is provided with a clamping opening for tweezers to hold the plate, which facilitates the assembly of the extraction plate.

[0008] Preferably, the sealing cap is screwed onto the mouth of the extraction bottle, and a sealing gasket is laid on the surface of the sealing cap that contacts the end face of the bottle mouth. The sealing gasket is made of polytetrafluoroethylene material to ensure the airtightness between the extraction bottle and the sealing cap.

[0009] Preferably, the sealing cap is equipped with a negative pressure connecting pipe, the height of the air inlet end of the negative pressure connecting pipe is greater than the liquid level in the extraction bottle, and the exhaust end is connected to a vacuum pump to improve the extraction efficiency.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This invention optimizes the structure of existing extraction bottles by adding an extraction plate to fix the position of floating samples during extraction, ensuring full contact between the sample and the extraction liquid and guaranteeing the accuracy of the test. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the bottle mouth structure of the extraction bottle of this utility model;

[0014] Figure 3 This is a schematic diagram of the extraction plate of this utility model;

[0015] Figure 4 This is a schematic diagram of the limiting groove of this utility model.

[0016] Attached diagram labels: 1. Extraction bottle, 2. Sealing cap, 3. Extraction plate, 31. Micropore, 32. Limiting rod, 11. Limiting groove, 12. Positioning groove, 6. Fixing rod, 7. Converging plate, 71. Converging groove, 33. Clamping port, 4. Sealing gasket, 5. Negative pressure connecting pipe. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0018] Example

[0019] An extraction device for biocompatibility testing of medical devices ensures sufficient contact between the sample and the extraction solution during the extraction of floating samples, thereby guaranteeing the accuracy of the test. Specifically, such as... Figure 1-4 As shown, this extraction device for biocompatibility testing of medical devices includes an extraction bottle 1 and a sealing cap 2 that cooperate with each other, and also includes an extraction plate 3. The extraction plate 3 has multiple microholes 31 for the extraction liquid to pass through, and multiple limiting rods 32 are evenly arranged on its periphery. The inner wall of the extraction bottle 1 is provided with a limiting groove 11 that is adapted to the limiting rod 32. One end of the limiting groove 11 is flush with the bottle mouth of the extraction bottle 1 to form an assembly end, and the other end is provided with a positioning groove 12. The limiting rod 32 is detachably inserted into the limiting groove 11 through the assembly end and enters the positioning groove 12 by twisting.

[0020] During the process, the extract is first injected into the extraction bottle 1, ensuring that the liquid level is higher than the positioning tank 12. Then, the floating sample is placed in the extraction bottle 1. Finally, the floating sample is pressed into the extract through the extraction plate 3 for extraction. During this process, the extraction plate 3 ensures that the sample and the extract are in full contact to ensure the accuracy of the test.

[0021] The process of pressing the floating sample into the extraction solution using extraction plate 3 is as follows:

[0022] First, the limiting rod 32 on the extraction plate 3 is inserted into the limiting groove 11 of the extraction bottle 1 through the assembly end; then, the extraction plate 3 is pressed down into the extraction solution until the limiting rod 32 abuts against the bottom of the limiting groove 11. During this process, the floating sample is pressed into the extraction solution by the extraction plate 3. During the process of immersing the extraction plate 3 into the extraction solution, the extraction solution passes through the micropore 31 through the extraction plate 3 to ensure that the extraction plate 3 can be immersed in the extraction solution; then, the extraction plate 3 is twisted to make the limiting rod 32 enter the positioning groove 12 to lock the position of the extraction plate 3. At this time, the extraction solution fully contacts the floating sample to ensure the accuracy of the test; finally, after the floating sample is extracted, the extraction plate 3 is twisted in the opposite direction to separate the limiting rod 32 from the positioning groove 12, and the extraction plate 3 is removed from the extraction bottle 1 to obtain the extracted floating sample.

[0023] To reduce the likelihood of floating samples clogging micropores 31, further measures are taken, such as... Figure 1 As shown, the extraction plate 3 is also provided with a fixing rod 6 on the side corresponding to the bottom of the extraction bottle 1. A converging plate 7 is provided on the fixing rod 6, and the side of the converging plate 7 corresponding to the bottom of the extraction bottle 1 is spherical. There is a gap between the periphery and the bottle wall of the extraction bottle 1. By folding, a converging groove 71 is formed with the periphery of the spherical surface. In the process of pressing the floating sample into the extraction liquid, the added converging plate 7 separates the extraction plate 3 from the floating sample, thereby reducing the probability of the floating sample clogging the micropores 31. Specifically, since the surface of the converging plate 7 in contact with the extraction liquid is spherical, the downward pressing surface of the converging plate 7 is increased. When the converging plate 7 presses down on the floating sample, the floating sample moves towards the spherical surface and converges into the converging groove. The extraction liquid flows from the gap between the converging plate 7 and the bottle wall of the extraction bottle 1 to the extraction plate 3 to pass through the micropores 31. In this process, the amount of floating sample in direct contact with the extraction plate 3 can be reduced, thereby reducing the probability of the floating sample clogging the micropores 31.

[0024] Considering that the extraction bottle 1 has depth, it is not convenient to move and twist the extraction plate 3 when it is inside the extraction bottle 1. Therefore, the top of the extraction plate 3 is provided with a clamping port 33 for tweezers to hold. When it is necessary to assemble or remove the extraction plate 3 from the extraction bottle 1, the extraction plate 3 can be moved and twisted by clamping the clamping port 33 with tweezers.

[0025] As a preferred embodiment of the above, the sealing cap 2 is screwed onto the mouth of the extraction bottle 1, and a sealing gasket 4 is laid on the surface of the sealing cap 2 that contacts the end face of the bottle mouth. The sealing gasket 4 is made of polytetrafluoroethylene material to ensure the seal between the sealing cap 2 and the mouth of the extraction bottle 1.

[0026] As a preferred embodiment of the above, the sealing cap 2 is provided with a negative pressure connecting pipe 5. The height of the air inlet end of the negative pressure connecting pipe 5 is greater than the liquid level in the extraction bottle 1, and the exhaust end is connected to a vacuum pump.

[0027] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. An extraction apparatus for biocompatibility testing of medical devices, comprising an extraction bottle (1) and a sealing cap (2) that cooperate with each other, characterized in that, It also includes an extraction plate (3), which has multiple microholes (31) for the extraction liquid to pass through, and multiple limiting rods (32) are evenly arranged on its periphery. The inner wall of the extraction bottle (1) is provided with a limiting groove (11) that is adapted to the limiting rod (32). One end of the limiting groove (11) is flush with the bottle mouth of the extraction bottle (1) to form an assembly end, and the other end is provided with a positioning groove (12). The limiting rod (32) is detachably inserted into the limiting groove (11) through the assembly end and enters the positioning groove (12) by twisting.

2. The extraction apparatus for biocompatibility testing of medical devices according to claim 1, characterized in that, The extraction plate (3) is also provided with a fixing rod (6) on one side corresponding to the bottom of the extraction bottle (1). The fixing rod (6) is provided with a converging plate (7), and the side of the converging plate (7) corresponding to the bottom of the extraction bottle (1) is spherical. The periphery has a gap with the bottle wall of the extraction bottle (1), and a converging groove (71) is formed with the periphery of the spherical surface by folding.

3. The extraction apparatus for biocompatibility testing of medical devices according to any one of claims 1-2, characterized in that, The top of the extraction plate (3) is provided with a clamping opening (33) for tweezers to hold the plate.

4. The extraction apparatus for biocompatibility testing of medical devices according to claim 3, characterized in that, The sealing cap (2) is screwed onto the mouth of the extraction bottle (1), and a sealing gasket (4) is laid on the surface of the sealing cap (2) that contacts the end face of the bottle mouth. The sealing gasket (4) is made of polytetrafluoroethylene material.

5. The extraction apparatus for biocompatibility testing of medical devices according to claim 3, characterized in that, The sealing cap (2) is provided with a negative pressure connecting pipe (5). The height of the air inlet end of the negative pressure connecting pipe (5) is greater than the liquid level in the extraction bottle (1), and the exhaust end is connected to a vacuum pump.

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