Test card

Abstract

Provided in the present application is a test card for use in a medical test device. The test card comprises a first clamping body, a second clamping body and an elastic body, wherein the elastic body has a first through opening, and is clamped between the first clamping body and the second clamping body; a first protruding platform is provided on the surface of the side of the first clamping body that faces the elastic body, has a contour matching the first through opening, and is fitted into the first through opening; and a test electrode is provided on the side of the first clamping body or the second clamping body that faces the elastic body, and is located in an area defined by the first through opening; and the first clamping body and the second clamping body seal the first through opening to form a sample channel. In this way, fitting the first protruding platform into the first through opening prevents the compressed portion of the elastic body from retracting towards the interior of the channel, such that the edge of the compressed portion of the elastic body is not easily deformed in shape to avoid changing the shape and size of a fluid channel, thereby reducing test errors.

Description

A test card Technical Field

[0001] The disclosed embodiments of the present application relate to the technical field of sample analysis, and more particularly, to a detection card. Background Art

[0002] Medical testing equipment utilizes blood gas analysis technology to assess a person's respiratory function and acid-base balance by measuring H+ concentration and dissolved gases (primarily O2, CO2, etc.) in a blood sample. The test card is a key component for measuring biochemical parameters in a blood sample. The card contains fluid channels and electrodes, or related circuitry, for detecting the liquid in these channels. Users must mate the interface on the test card with the interface on the test kit to ensure that the reagents in the reagent pack can reach the fluid channels in the test card.

[0003] The test card consists of an upper housing, a circuit board, and a lower housing. A rubber sheet is positioned between the upper housing and the circuit board. The upper housing and the circuit board squeeze the rubber sheet, creating a sealed channel between the upper housing, the rubber sheet, and the circuit board. This allows liquid entering the test card to flow through the channel and be tested. However, as the rubber sheet is squeezed to form the channel, some of the squeezed rubber sheet will retract into the channel, causing deformation at the edge of the squeezed rubber sheet, changing the shape and size of the fluid channel and increasing detection errors.

[0004] Summary of the Invention

[0005] According to an embodiment of the present application, the present application proposes a detection card to solve the above-mentioned problem.

[0006] The present application provides a test card for use in medical testing equipment, the test card comprising: a first clamping body, a second clamping body, and an elastic body. The elastic body has a first through-hole, the elastic body is sandwiched between the first clamping body and the second clamping body, the first clamping body has a first raised platform on a side facing the elastic body, the first raised platform has a profile that matches the first through-hole, and the first raised platform is embedded in the first through-hole, the first clamping body or the second clamping body has a detection electrode on the side facing the elastic body, and the detection electrode is located in the area defined by the first through-hole, and the first clamping body and the second clamping body seal the first through-hole to form a sample channel.

[0007] The beneficial effects of the present application are as follows: a first raised platform is provided on the surface of the first clamping body facing the elastomer, and the first raised platform is embedded in the first through-hole, thereby preventing the squeezed part of the elastomer from shrinking into the channel, making the edge shape of the squeezed part of the elastomer not easily deformed, and will not change the shape and size of the fluid channel, thereby reducing detection errors.

[0008] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present application will be further described below with reference to the accompanying drawings and implementation methods, in which:

[0010] FIG1 is a schematic diagram of the assembly of a test card according to an embodiment of the present application;

[0011] FIG2 is a schematic cross-sectional view of the assembly of a first clamping body, an elastic body, and a second clamping body according to an embodiment of the present application;

[0012] FIG3 is a partial enlarged schematic diagram of area A in the embodiment of FIG2 ;

[0013] FIG4 is a schematic structural diagram of a first clamping body according to an embodiment of the present application;

[0014] FIG5 is a schematic top view of the structure of the first clamping body of the embodiment of FIG4;

[0015] FIG6 is a schematic structural diagram of an elastic body according to an embodiment of the present application;

[0016] FIG7 is a schematic structural diagram of a first clamping body according to another embodiment of the present application;

[0017] FIG8 is a schematic diagram showing the partial disassembly of the structure of a detection card according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0019] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of, for example, including at least one of A, B, and C, can mean including any one or more elements selected from the set consisting of A, B, and C. In addition, the terms "first", "second", and "third" in this application are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0020] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution of the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0021] Next, we'll discuss a medical testing device that utilizes blood gas analysis technology. Blood gas analysis, applied to medical testing equipment, measures the H+ concentration and dissolved gases (primarily O2, CO2, etc.) in a blood sample to understand a person's respiratory function and acid-base balance. This technique directly reflects lung ventilation function and its acid-base balance, and the specimen used is typically a blood sample.

[0022] Among them, the test card is an important structural component for measuring biochemical parameters in blood samples. The test card can be used in conjunction with medical testing equipment to measure the pH value, hematocrit, ion concentration (K + 、Na + 、Cl - , Ca 2+ ), glucose, lactate, and biochemical parameters such as O2 and CO2 partial pressure. The test card can generally use electrochemical method or AC impedance method to complete the measurement of the above biochemical parameters.

[0023] The test card contains fluid channels and electrodes, or related circuitry, for detecting liquids within the channels. The user must mate the interface on the test card with the interface on the test kit so that the reagents in the reagent pack can reach the fluid channels in the test card. Furthermore, the test card must be installed in a medical testing device so that the device's processing circuitry can contact the detection electrodes on the test card, establishing an electrical connection and enabling testing of the relevant sample.

[0024] Please refer to Figures 1 to 8. Figure 1 is a schematic diagram of the assembly of a test card according to an embodiment of the present application. Figure 2 is a schematic cross-sectional diagram of the assembly of the first clamping body, the elastic body, and the second clamping body according to an embodiment of the present application. Figure 3 is a partially enlarged schematic diagram of area A in the embodiment of Figure 2. Figure 4 is a schematic diagram of the structure of the first clamping body according to an embodiment of the present application. Figure 5 is a schematic diagram of the structure of the first clamping body according to the embodiment of Figure 4 from a top view. Figure 6 is a schematic diagram of the structure of the elastic body according to an embodiment of the present application. Figure 7 is a schematic diagram of the structure of the first clamping body according to another embodiment of the present application. Figure 8 is a schematic diagram of the partial disassembly of the structure of the test card according to an embodiment of the present application. The test card of the medical testing device includes: a first clamping body 10, a second clamping body 30, and an elastic body 20. The elastic body 20 has a first through-hole 21 and is sandwiched between the first clamping body 10 and the second clamping body 30. The first clamping body 10 has a first raised platform 11 on the side facing the elastic body 20. The contour of the first raised platform 11 matches the first through-hole 21 and the first raised platform 11 is embedded in the first through-hole 21. A detection electrode is provided on the side of the first clamping body 10 or the second clamping body 30 facing the elastic body 20, and the detection electrode is located in the area defined by the first through-hole 21. The first clamping body 10 and the second clamping body 30 block the first through-hole 21 to form a sample channel. The elastic body 20 can be made of a flexible material such as rubber or silicone, the first clamping body 10 can be made of a rigid material such as plastic, and the second clamping body 30 can be made of a circuit board.

[0025] As can be understood, the elastic body 20 is sandwiched between the first clamping body 10 and the second clamping body 30. A liquid inlet channel 33 and a liquid outlet channel 34 are provided below the second clamping body 30. A liquid inlet 31 is provided on the second clamping body 30 at a position corresponding to the liquid inlet channel 33. Several detection electrodes are provided adjacent to the liquid inlet 31. A first through-hole 21 is provided on the elastic member corresponding to the liquid inlet 31 and above the detection electrodes. The first through-hole 21 connects the liquid inlet 31 and the several detection electrodes. At least a portion of the first raised platform 11 is embedded in the first through-hole 21. The first through-hole 21 is sealed by the first clamping body 10 and the second clamping body 30 to form a sample channel. Optionally, the first through-hole 21 can be a long T-shaped hollow portion. After the liquid flows out of the liquid inlet 31 above the liquid inlet channel 33, its flow direction is restricted by the first through-hole 21 of the elastic body 20, allowing the liquid to flow from the liquid inlet 31 toward the detection electrode. The liquid is then resisted by the first raised platform 11, ensuring that the liquid evenly covers the detection electrode. Optionally, calibration fluid for calibrating the detection electrodes and cleaning fluid for cleaning the channel can also enter the sample channel through the liquid inlet 31.

[0026] In this embodiment, a first raised platform is provided on the surface of the first clamping body on one side facing the elastomer, and the first raised platform is embedded in the first through-hole, thereby preventing the squeezed portion of the elastomer from shrinking into the channel, making the edge shape of the squeezed portion of the elastomer less likely to deform, and not changing the shape and size of the fluid channel, thereby reducing detection errors and making it possible to press the elastomer tightly during the assembly process without generating a large rebound force.

[0027] In other embodiments of the present application, a second raised platform 12 is formed on a surface of the first clamping body 10 facing the elastic body 20. The second raised platform 12 surrounds the first raised platform 11 and is used to press the elastic body 20 to seal the sample channel. The second raised platform 12 is lower than the first raised platform 11.

[0028] It can be understood that in this embodiment, when the second raised platform 12 squeezes the elastomer 20 to seal the periphery of the first through-opening 21 to form a sample channel, part of the elastomer 20 squeezed by the second raised platform 12 will retract into the first through-opening 21. In order to prevent part of the elastomer 20 from retracting into the first through-opening 21, the first raised platform 11 is made higher than the second raised platform 12, and the first raised platform 11 is at least partially embedded in the first through-opening 21. The first raised platform 11 can also be used to position the first through-opening 21 to limit the elastomer 20.

[0029] Optionally, the depth of the first protruding platform 11 embedded in the first through-hole 21 is between one tenth and two thirds of the depth of the first through-hole 21 .

[0030] In other embodiments of the present application, the elastomer 20 has a second through-hole 22, and the first clamping body 10 has a first groove 13 on a side facing the elastomer 20, the second through-hole 22 is connected to the first groove 13, and the first clamping body 10 and the second clamping body 30 close the second through-hole 22 to form a reference liquid channel.

[0031] In this embodiment, a first recess 15 is provided in the first groove 13. The depth and width of the first recess 15 are both greater than those of the first groove 13. The shape of the first recess 15 matches the shape of the second through-opening 22. The second through-opening 22 is sealed by the first clamping body 10 and the second clamping body 30 to form a reference liquid channel. Alternatively, the second through-opening 22 may be an elliptical hollow portion, and the first recess 15 may be a substantially elliptical recess. Liquid enters the sealed accommodation space formed by the second through-opening 22, the second clamping body 30, and the first recess 15 from one side of the first recess 15 and flows out from the other side of the first recess 15 along the first groove 13.

[0032] In other embodiments of the present application, the second clamping body 30 has a liquid inlet 31 and a liquid outlet 32, and the test card includes a first valve (not shown), a second valve (not shown), and a third valve (not shown). The liquid inlet 31 is connected to one end of the sample channel, and the other end of the sample channel has a first branch 111 and a second branch 112. The first branch 111 is connected to the liquid outlet 32 ​​via the first valve, and the second branch 112 is connected to one end of the reference liquid channel via the second valve. The other end of the reference liquid channel is connected to the liquid outlet 32 ​​via the third valve.

[0033] In this embodiment, the first, second, and third valves are located on the side of the first clamping body 10 facing away from the second clamping body 30. The first valve is used to control the flow of fluid between the liquid inlet 31, the sample channel, and the liquid outlet 32. The second valve is used to control the flow of fluid between the liquid inlet 31, the sample channel, and the reference liquid channel. The third valve is used to control the flow of fluid between the reference liquid channel and the liquid outlet 32. As will be understood, the liquid inlet 31 and the liquid outlet 32 ​​are provided corresponding to the liquid inlet channel 33 and the liquid outlet channel 34 below the second clamping body 30. The liquid inlet 31 is located in the sample channel formed by the first through-port 21, the second clamping body 30, and the first raised platform 11. Two branches are provided at the ends of the sample channel. When the first valve is opened, liquid flowing out of the liquid inlet 31 can pass through the first branch 111 and the first valve, and then flow out of the test card through the liquid outlet 32. When the second valve is opened, the liquid flowing out of the liquid inlet 31 can pass through the second branch 112 and the second valve and enter the reference liquid channel formed by the second through-hole 22, the second clamping body 30 and the second raised platform 12. At the same time, if the third valve is opened, the liquid entering the reference liquid channel can pass through the third valve and flow out of the test card from the liquid outlet 32.

[0034] In a more specific embodiment, the first raised platform 11 is provided with a slope and a first through hole 41 and a second through hole 42 at the end of the slope in the area corresponding to the first branch 111 and the second branch 112. The first branch 111 is connected to the first valve through the first through hole 41, and the second branch 112 is connected to the second valve through the second through hole 42.

[0035] In this embodiment, at the end of the sample channel, that is, on the two branches corresponding to the end of the first through-port 21, the first raised platform 11 corresponding to the top of the first through-port 21 is also provided with two branches, and the two branches are provided with two slopes. It can be understood that when the liquid flows from the liquid inlet 31 to the end of the sample channel, since the first branch 111 and the second branch 112 of the first raised platform 11 are slopes, the space of the sample channel at the branch becomes larger, so that the liquid in the sample channel can flow out of the end of the sample channel faster. Among them, the first through-hole 41 and the second through-hole 42 at the end of the slope allow the liquid to pass through the first through-hole 41 and the first valve at the end of the first branch 111 and flow out of the test card from the liquid outlet 32, or pass through the second through-hole 42 and the second valve at the end of the second branch 112 and enter the reference liquid channel.

[0036] In other embodiments of the present application, a third through-hole 43 is provided at one end of the first groove 13 of the first clamping body adjacent to the second branch 112, and a fourth through-hole 44 is provided at the other end of the first groove 13. The first clamping body 10 has a second groove 14 on the side of the surface facing the elastic body 20, and a fifth through-hole 45 and a sixth through-hole 46 are provided at both ends of the second groove 14. The liquid outlet 32 ​​is connected to the second groove 14. The first clamping body 10 has a first mounting position 51, a second mounting position 52, and a third mounting position 53 on the side of the surface facing away from the elastic body 20. The first mounting position 51, the second mounting position 52, and the third mounting position 53 are used to install the first valve, the second valve, and the third valve, respectively. The first through-hole 41 and the fifth through-hole 45 are both connected to the first valve, the second through-hole 42 and the third through-hole 43 are both connected to the second valve, and the fourth through-hole 44 and the sixth through-hole 46 are both connected to the third valve.

[0037] In this embodiment, a third through hole 43 is provided at the head end of the reference liquid channel, and a fourth through hole 44 is provided at the end of the reference liquid channel. The first through hole 41, the second through hole 42, the third through hole 43 and the fourth through hole 44 are approximately located on the same horizontal line. A second groove 14 is provided on the side surface of the first clamping body 10 facing the elastic body 20 and parallel to and adjacent to the horizontal line. A fifth through hole 45 and a sixth through hole 46 are provided at both ends of the second groove 14, and the liquid outlet 32 ​​is connected to the second groove. It can be understood that by opening the first valve in the first installation position 51, the liquid flowing out from the liquid inlet 31 can flow from the first through hole 41 at the end of the first branch 111 of the sample channel, pass through the first valve, and then flow into the second groove 14 through the fifth through hole 45, and flow out of the detection card through the liquid outlet 32 ​​connected to the second groove 14; or by opening the second valve in the second installation position 52, the liquid flowing out from the liquid inlet 31 can flow from the second through hole 42 at the end of the second branch 112 of the sample channel, pass through the second valve, and then flow into the reference liquid channel through the third through hole 43; or by opening the third valve in the third installation position 53, the liquid in the reference liquid channel can flow from the fourth through hole 44 at the end of the reference liquid channel, pass through the third valve, and then flow into the second groove 14 through the sixth through hole 46, and flow out of the detection card through the liquid outlet 32 ​​connected to the second groove 14.

[0038] In some other embodiments of the present application, a guiding slope 17 is provided at the bottom portion of the first groove 13 between the third through hole 43 and the first recess 15 to guide the reference solution into the second through port 22 .

[0039] It can be understood that the liquid flowing out of the liquid inlet 31 flows into the reference liquid channel through the second through hole 42, the second valve and the third through hole 43. When the liquid flows out of the third through hole 43, it contacts the elastomer 20 and enters the accommodating space formed by the first recess 15, the second through hole 22 and the second clamping body 30 from the accommodating space formed by the elastomer 20 and the guide slope 17.

[0040] In other embodiments of the present application, a second recess 16 is provided on the side of the first clamping body 10 facing the elastomer 20, and the first raised platform 11, the second raised platform 12 and the first groove 13 are all in the second recess 16. The shape of the second recess 16 matches the shape of the elastomer 20, and the elastomer 20 is at least partially embedded in the second recess 16; wherein, the second raised platform 12 surrounds the first groove 13 to seal the reference liquid channel.

[0041] It can be understood that the second raised platform 12 surrounds the first raised platform 11 and the first groove 13. When the elastic member is at least partially embedded in the second recess 16 of the first clamping body 10 and clamped by the second clamping body 30, a reference liquid channel and a sample channel can be formed in the first clamping body 10, the second clamping body 30 and the elastic body 20.

[0042] Referring to Figure 1 , the test card includes a third clamping body 60 and several fixing members 70. The first clamping body 10 serves as the upper housing of the test card and is provided with a first through-hole 71. The elastic body 20 is provided with a second through-hole 72. The second clamping body 30 serves as the circuit board of the test card and is provided with a third through-hole 73. The third clamping body 70 serves as the lower housing of the test card and is provided with a fourth through-hole 74. The fixing members pass through the fourth through-hole 74, the third through-hole 73, the second through-hole 72, and the first through-hole 71 to secure the first clamping body 10, the elastic body 20, the second clamping body 30, and the third clamping body 70.

[0043] It is easy for a person skilled in the art to know that many modifications and variations can be made to the apparatus and method while maintaining the teaching content of the present application.Therefore, the above disclosure should be considered as being limited only by the scope of the appended claims.

Claims

1. A test card used in medical testing equipment, characterized in that: include: A first clamping body, a second clamping body and an elastic body; Among them, the elastomer has a first through-hole, and the elastomer is clamped between the first clamping body and the second clamping body. The first clamping body has a first raised platform on the side surface facing the elastomer, the contour of the first raised platform matches the first through-hole, and the first raised platform is embedded in the first through-hole. The first clamping body or the second clamping body is provided with a detection electrode on the side facing the elastomer, and the detection electrode is located in the defined area of ​​the first through-hole, and the first clamping body and the second clamping body close the first through-hole to form a sample channel.

2. The detection card according to claim 1, characterized in that: A second raised platform is provided on a side surface of the first clamping body facing the elastic body, the second raised platform is arranged around the first raised platform, and the second raised platform is used to press the elastic body to seal the sample channel; Wherein, the second raised platform is lower than the first raised platform.

3. The detection card according to claim 2, characterized in that: The elastic body has a second through hole, the first clamping body has a first groove on a side facing the elastic body, the second through hole is communicated with the first groove, and the first clamping body and the second clamping body close the second through hole to form a reference liquid channel.

4. The detection card according to claim 3, characterized in that: The second clamping body has a liquid inlet and a liquid outlet, and the detection card includes: a first valve, a second valve and a third valve; The liquid inlet is connected to one end of the sample channel, and the other end of the sample channel has a first branch and a second branch, the first branch is connected to the liquid outlet through a first valve, the second branch is connected to one end of the reference liquid channel through the second valve, and the other end of the reference liquid channel is connected to the liquid outlet through the third valve.

5. The detection card according to claim 4, characterized in that: The first protruding platform is provided in an area corresponding to the first branch and the second branch. A slope and a first through hole and a second through hole at the end of the slope are provided. The first branch is connected to the first valve through the first through hole, and the second branch is connected to the second valve through the second through hole.

6. The detection card according to claim 4, characterized in that: A first depression is provided in the first groove, and the depth and width of the first depression are both greater than the depth and width of the first groove; A third through hole is provided at one end of the first groove of the first clamping body adjacent to the second branch, a fourth through hole is provided at the other end of the first groove, a second groove is provided on one side of the first clamping body facing the elastic body, a fifth through hole and a sixth through hole are provided at both ends of the second groove, and the liquid outlet is connected to the second groove; A surface of the first clamping body on one side facing away from the elastic body has a first mounting position, a second mounting position and a third mounting position, and the first mounting position, the second mounting position and the third mounting position are used to mount the first valve, the second valve and the third valve respectively; The first through hole and the fifth through hole are both connected to the first valve, the second through hole and the third through hole are both connected to the second valve, and the fourth through hole and the sixth through hole are both connected to the third valve.

7. The detection card according to claim 6, characterized in that: A guiding slope is provided at the bottom portion of the first groove between the third through hole and the first recess to guide the reference solution into the second through port.

8. The detection card according to claim 3, characterized in that: The first clamping body is provided with a second recess on the side facing the elastomer, the first raised platform, the second raised platform and the first groove are all in the second recess, the shape of the second recess matches the shape of the elastomer, and the elastomer is at least partially embedded in the second recess; wherein the second raised platform surrounds the first groove to seal the reference liquid channel.

9. The detection card according to claim 8, characterized in that: include: A third clamping body and a plurality of fixing members; Wherein, the first clamping body is the upper shell of the detection card and is provided with a first through hole. The elastic body is provided with a second through hole, the second clamping body is the circuit board of the detection card and is provided with a third through hole, the third clamping body is the lower shell of the detection card and is provided with a fourth through hole, and the fixing member passes through the fourth through hole, the third through hole, the second through hole and the first through hole to fix the first clamping body, the elastic body, the second clamping body and the third clamping body.

10. The detection card according to claim 1, characterized in that: The first protruding platform is embedded in the first through-hole to a depth between one tenth and two thirds of the depth of the first through-hole.

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