Blood gas analyzer and its blood gas biochemistry test card

Abstract

This invention relates to a blood gas analyzer and its blood gas biochemistry test card, comprising at least a test card body with an inlet, an exhaust port, and a liquid pipeline, and an electrode circuit board disposed on the test card body. The liquid pipeline includes a waste liquid chamber, a test liquid pipeline connected at one end to the inlet, and electrode pipelines connected at both ends to the waste liquid chamber and the test liquid pipeline, respectively. The electrode pipelines are connected to the electrode circuit board. The waste liquid chamber includes at least a first waste liquid chamber and a second waste liquid chamber arranged side by side, and a drain port connecting the first and second waste liquid chambers. The first waste liquid chamber has an inlet connected to the electrode pipeline, and the second waste liquid chamber has an outlet connected to the exhaust port. The outlet is located above the inlet, and the drain port is located on the side closer to the outlet. No sealing plugs are required on the exhaust ports; external devices are directly connected to the exhaust ports, eliminating the problem of debris generation due to puncturing the sealing plugs and eliminating the risk of debris contaminating the electrodes and causing test failure.

Description

[0001] This invention is a divisional application of the invention patent application filed on March 31, 2016, with application number 201610207326.0 and invention title "Blood Gas Analyzer and Blood Gas Biochemical Test Card". Technical Field

[0002] This invention relates to the field of medical technology, and in particular to a blood gas analyzer and its blood gas biochemistry test card. Background Technology

[0003] Blood gas and biochemistry test cards are widely used in the medical industry. These cards integrate biochemical testing electrodes and are calibrated using a calibration solution provided in the reagent kit. After testing, the vent is typically sealed with a plug to prevent leakage of the calibration solution and test solution. However, during testing, the injection needle on the vacuum pump inside the instrument needs to pierce the sealing plug to connect with the tubing inside the test card. During this piercing process, debris can easily form on the sealing plug, which can flow with the calibration solution onto the testing electrode, rendering the electrode unusable and causing the test card to become unusable. Furthermore, after testing, the injection needle needs to be removed from the sealing plug. Because the sealing plug has been pierced, there is a risk that the sealing plug may not completely seal the piercing hole, allowing test solution to leak out and causing liquid contamination. Summary of the Invention

[0004] The purpose of this invention is to provide a blood gas analyzer and its blood gas biochemical test card, which can avoid the problems of liquid leakage and contamination, and eliminate the hidden danger of debris contaminating the electrodes and causing the test to be scrapped.

[0005] To achieve the objective of this invention, the technical solution adopted is as follows:

[0006] A blood gas biochemistry test card includes at least a test card body with an inlet, an outlet, and a liquid pipeline, and an electrode circuit board disposed on the test card body. The liquid pipeline includes a waste liquid chamber, a test liquid pipeline with one end connected to the inlet, and an electrode pipeline with both ends connected to the waste liquid chamber and the test liquid pipeline, respectively. The electrode pipeline is connected to the electrode circuit board. The waste liquid chamber includes at least a first waste liquid chamber and a second waste liquid chamber arranged side by side, and a drain port connecting the first waste liquid chamber and the second waste liquid chamber. The first waste liquid chamber has an inlet connected to the electrode pipeline, and the second waste liquid chamber has an outlet connected to the outlet. The outlet is located above the inlet.

[0007] After the test is completed, the suction port is detached from the external device, and the calibration solution is stored in the first waste liquid chamber. A drain port is provided between the first and second waste liquid chambers. Due to the cross-sectional difference between the drain port and the waste liquid chambers, the calibration solution cannot flow from the first waste liquid chamber into the second waste liquid chamber due to its own liquid surface tension, further preventing liquid leakage from the suction port. Compared with traditional test cards, the suction port of this invention does not require a sealing plug. The external device is directly connected to the suction port, eliminating the problem of debris generation due to puncturing the sealing plug and eliminating the risk of debris contaminating the electrodes and causing test failure.

[0008] The technical solution is further explained below:

[0009] Furthermore, the test card body also includes a calibration liquid port, and the liquid pipeline includes a calibration liquid pipeline connected to the test liquid pipeline and electrode pipeline. The highest point of the calibration liquid pipeline is higher than the surface of the test liquid. After the test is completed, the calibration liquid port is detached from the external device, and the test liquid is stored in the electrode pipeline and the calibration liquid pipeline. Because the highest point of the calibration liquid pipeline is higher than the surface of the test liquid, the test liquid cannot flow past the highest point of the calibration liquid pipeline without external force, and the liquid will not leak from the calibration liquid port, preventing liquid contamination. Compared with traditional test cards, the calibration liquid port of this invention does not require a sealing plug, and the external device is directly connected to the calibration liquid port, eliminating the problem of debris generated due to puncturing the sealing plug and eliminating the risk of debris contaminating the electrode and causing test failure.

[0010] Furthermore, a leak-proof groove with an upward-facing opening is recessed at the highest point of the calibration solution pipeline. The cross-sectional difference between the leak-proof groove and the calibration solution pipeline prevents the test solution from flowing out of the leak-proof groove due to its own surface tension, further preventing leakage from the calibration solution outlet.

[0011] Furthermore, support columns are provided in both the first and second waste liquid chambers, with the drain outlet located near the top of either the first or second waste liquid chamber. By providing support columns, the sealing membrane on the test card is prevented from sinking into the waste liquid chamber when air is drawn through the extraction port. Additionally, by placing the drain outlet near the top of either the first or second waste liquid chamber, leakage from the extraction port is further prevented.

[0012] Furthermore, the blood gas biochemistry test card also includes an electrode test slot, and the bottom of the electrode tube is connected to the electrode circuit board through the electrode test slot.

[0013] Furthermore, the inlet is located at the bottom of the first waste liquid chamber, and the outlet is located at the top of the second waste liquid chamber. Without external force, the calibration solution cannot flow out of the outlet, thus preventing liquid leakage from the air extraction port connected to the outlet, further preventing liquid contamination.

[0014] Furthermore, the blood gas biochemistry test card also includes a pressure-retaining component and a sealing membrane for sealing the liquid pipeline. The sealing membrane is an elastic composite membrane, and a groove is provided on the opposite side of the test liquid pipeline and the sealing membrane. The sealing membrane is located between the groove and the pressure-retaining component, which has a pressure head that matches the shape of the groove. When the pressure-retaining component squeezes the sealing membrane to fit against the groove, the test liquid pipeline is closed. Since the sealing membrane is an elastic composite membrane, when the pressure-retaining component leaves the sealing membrane, the sealing membrane deforms away from the groove due to its own elasticity, and the test liquid pipeline is opened. The groove is set in the test liquid pipeline and forms an integral part with it, eliminating unnecessary cavities and preventing residual air bubbles. This also reduces the amount of test liquid used and improves test accuracy. The test card body does not require a switch plug or a sealing membrane to cover the channel switch plug, avoiding air leakage, reducing the number of parts, facilitating production, and lowering the product defect rate.

[0015] Furthermore, the sealing membrane comprises an adhesive film, an elastic silicone film, and a PET film. The adhesive film is bonded between the test card body and the elastic silicone film, and the PET film covers the side of the elastic silicone film facing away from the groove. The adhesive film serves to bond the sealing membrane to the test card body, thus sealing all the channels of the test card; the elastic silicone film provides a sealing function, filling the groove of the test card body with its own elasticity; the PET film provides support and reset, ensuring that the sealing membrane effectively resets after the external force is removed while deforming. Moreover, the sealing membrane uses a flat and large-area application method to seal the liquid channels within the entire test card, further preventing air leakage.

[0016] Furthermore, the bottom of the groove has a protrusion that extends towards the sealing membrane. When the sealing membrane fills the groove, the protrusion is embedded in the sealing membrane, resulting in a better seal for the test liquid pipeline.

[0017] The present invention also provides a blood gas analyzer, including a reagent pack, a pump and a blood gas biochemistry test card. The reagent pack is provided with a first pin communicating with a calibration solution port, and the pump is provided with a second pin communicating with a gas extraction port.

[0018] When calibrating the electrodes by drawing calibration solution, the test solution pipeline is closed. The reagent pack operates to connect the calibration solution pipeline inside the reagent pack with the calibration solution port, and the pump is connected to the air extraction port. The pump operates to create negative pressure in the liquid pipeline, causing the calibration solution to flow from the reagent pack into the calibration solution pipeline and electrode pipeline of the test card. After calibration, the reagent pack rotates to connect the air pipeline inside the reagent pack with the calibration solution port. The pump continues to operate to create negative pressure in the liquid pipeline, causing air to flow from the reagent pack into the calibration solution pipeline and electrode pipeline, while the calibration solution is drawn into the waste liquid chamber. Then, the test solution is drawn, the test solution pipeline is opened, the reagent pack operates to close the pipeline inside the reagent pack with the calibration solution port, and the pump continues to operate to create negative pressure in the liquid pipeline, causing the test solution to flow from the sample inlet into the test solution pipeline and electrode pipeline for testing. After the test, the blood gas analyzer equipped with this blood gas biochemistry test card can avoid liquid leakage and contamination problems, and eliminate the risk of test failure due to debris contamination of the electrodes.

[0019] Furthermore, the blood gas analyzer also includes a sealing element, which is fitted onto the first and second pins. The outer wall of the test card body has a sealing groove that matches the shape of the sealing element. This improves the effectiveness of the blood gas analyzer in preventing liquid leakage. Compared with traditional blood gas analyzers, the sealing element seals the first and second pins separately and is separate from the test card body. This ensures a tight seal while avoiding the risk of debris contaminating the electrodes and causing test failure.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] After the test is completed, the exhaust port and calibration liquid port of this invention are detached from the external device. The calibration liquid is stored in the waste liquid chamber, and the test liquid is stored in the electrode pipeline and the calibration liquid pipeline. Since the outlet of the waste liquid chamber is located above the inlet, the calibration liquid cannot flow out of the outlet without external force. Therefore, the exhaust port connected to the outlet will not leak liquid, preventing liquid contamination. Furthermore, the highest point of the calibration liquid pipeline is higher than the liquid level of the test liquid. Without external force, the test liquid cannot flow past the highest point of the calibration liquid pipeline, preventing liquid leakage from the calibration liquid port and preventing liquid contamination. Compared with traditional test cards, no sealing plugs are needed on the calibration liquid port and the exhaust port. The external device is directly connected to the calibration liquid port and the exhaust port, eliminating the problem of debris generated due to puncturing the sealing plug and eliminating the risk of debris contaminating the electrode and causing test failure. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the blood gas biochemistry test card according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Sectional view along the AA direction;

[0024] Figure 3 for Figure 2 Enlarged view of point I;

[0025] Figure 4 This is a schematic diagram of the blood gas analyzer according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the first working state of the blood gas analyzer according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the second working state of the blood gas analyzer according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the third working state of the blood gas analyzer according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Test card body; 110. Sample inlet; 120. Vacuum outlet; 130. Liquid pipeline; 131. Test liquid pipeline; 1311. Groove; 1312. Protrusion; 132. Calibration liquid pipeline; 1321. Calibration liquid outlet; 1322. Leak-proof groove; 1323. Top; 133. Waste liquid chamber; 1331. Liquid inlet; 1332. Liquid outlet; 1333. Drain outlet; 1334. First waste liquid chamber; 1335. Second waste liquid chamber. 134. Cavity; 135. Electrode pipe; 140. Waste liquid pipe; 150. Support column; 160. Electrode test tank; 170. Seal; 20. Sealing groove; 410. Electrode circuit board; 50. Pressing component; 410. Press head; 50. Sealing membrane; 510. Adhesive film; 520. Elastic silicone membrane; 530. PET membrane; 60. Injection needle; 70. Syringe; 80. Reagent pack; 810. First insertion needle; 90. Pump; 910. Second insertion needle. Detailed Implementation

[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0032] like Figure 1 and Figure 2As shown, a blood gas biochemistry test card includes at least a test card body 10 with an inlet 110, a calibration solution inlet 1321, and an exhaust port 120; a liquid conduit 130 and an electrode circuit board 20 disposed on the test card body 10; and a sealing membrane 50 sealing the liquid conduit 130. The liquid conduit 130 includes a test solution conduit 131, a calibration solution conduit 132, a waste liquid chamber 133, and an electrode conduit 134 connected to the electrode circuit board 20. One end of the test solution conduit 131 is connected to the inlet 110. One end is connected to the calibration solution pipe 132 and the electrode pipe 134. The end of the calibration solution pipe 132 away from the test solution pipe 131 is connected to the calibration solution port 1321. The end of the electrode pipe 134 away from the test solution pipe 131 is connected to the inlet 1331 of the waste liquid chamber 133. The outlet 1332 of the waste liquid chamber 133 is connected to the air extraction port 120. The outlet 1332 is located above the inlet 1331. The highest point of the calibration solution pipe 132 is higher than the surface of the test solution.

[0033] After the test is completed, the vent 120 and calibration liquid port 1321 are disconnected from the external device. The calibration liquid is stored in the waste liquid chamber 133, and the test liquid is stored in the electrode pipe 134 and the calibration liquid pipe 132. Since the outlet 1332 of the waste liquid chamber 133 is located above the inlet 1331, the calibration liquid cannot flow out from the outlet 1332 without external force. Therefore, the vent 120 connected to the outlet 1332 will not leak liquid, preventing liquid contamination. Furthermore, the highest liquid level in the calibration liquid pipe 132, i.e., the top 1323 of the pipe, is higher than the liquid level of the test liquid. Without external force, the test liquid cannot flow past the highest liquid level in the calibration liquid pipe 132, and the liquid will not leak from the calibration liquid port 1321, preventing liquid contamination. Compared with traditional test cards, the calibration liquid port 1321 and the air extraction port 120 of this invention do not require sealing plugs. External devices are directly connected to the calibration liquid port 1321 and the air extraction port 120, eliminating the problem of debris generated due to puncturing the sealing plug and eliminating the risk of debris contaminating the electrode and causing test failure.

[0034] In this embodiment, the waste liquid chamber 133 includes a first waste liquid chamber 1334 and a second waste liquid chamber 1335 arranged side by side, and a drain port 1333 connecting the first waste liquid chamber 1334 and the second waste liquid chamber 1335. The bottom of the first waste liquid chamber 1334 is provided with a liquid inlet 1331, and the top of the second waste liquid chamber 1335 is provided with a liquid outlet 1332. The drain port 1333 is located on the side close to the liquid outlet 1332. After the test, the calibration solution is stored in the first waste liquid chamber 1334. A drain port 1333 is provided between the first waste liquid chamber 1334 and the second waste liquid chamber 1335. The drain port 1333 is located on the side near the outlet 1332 and connects to the top of the first waste liquid chamber 1334 and the second waste liquid chamber 1335. There is a cross-sectional difference between the drain port 1333 and the waste liquid chamber 133. Due to its own liquid surface tension, the calibration solution cannot easily flow from the first waste liquid chamber 1334 into the second waste liquid chamber 1335, further preventing liquid leakage from the vent 120. More than one waste liquid chamber 133 can be provided as needed.

[0035] like Figure 1 As shown, the liquid pipeline 130 also includes a waste liquid pipeline 135, and the waste liquid pipeline 135 is connected between the liquid outlet 1332 and the air extraction port 120.

[0036] like Figure 1 As shown, the top 1323 of the calibration fluid pipeline 132 has an upward-facing anti-leakage groove 1322. There is a cross-sectional difference between the anti-leakage groove 1322 and the calibration fluid pipeline 132, preventing the test fluid from flowing out of the anti-leakage groove 1322 due to its own liquid surface tension, further preventing leakage from the calibration fluid outlet 1321. The anti-leakage groove 1322 can also be installed between the top 1323 of the calibration fluid pipeline 132 and the end where the calibration fluid pipeline 132 connects to the test fluid pipeline 131, depending on actual needs.

[0037] like Figure 2 As shown, the blood gas biochemistry test card also includes an electrode test slot 150, and the bottom of the electrode pipe 134 is connected to the electrode circuit board 20 through the electrode test slot 150.

[0038] like Figure 2 and Figure 5As shown, the blood gas biochemistry test card also includes a pressure member 40, a sealing membrane 50 which is an elastic composite membrane, and a groove 1311 on the opposite side of the test liquid pipeline 131 and the sealing membrane 50. The sealing membrane 50 is located between the groove 1311 and the pressure member 40, and the pressure member 40 is provided with a pressure head 410 that matches the shape of the groove 1311. When the pressure member 40 squeezes the sealing membrane 50 to adhere to the groove 1311, the test liquid pipeline 131 is closed; when the pressure member 40 leaves the sealing membrane 50, the sealing membrane 50 leaves the groove 1311 by its own elastic deformation, and the test liquid pipeline 131 is opened. The groove 1311 is set in the test liquid pipeline 131 and forms an integral part with the test liquid pipeline 131, without any extra cavity or residual air bubbles, while reducing the amount of test liquid used and improving test accuracy. The test card body 10 does not need to be equipped with a switch plug and a sealing membrane to cover the channel switch plug, avoiding air leakage problems, reducing the number of parts, facilitating production, and reducing product defect rate.

[0039] In this embodiment, as Figure 3 As shown, the sealing membrane 50 includes an adhesive film 510, an elastic silicone film 520, and a PET film 530. The adhesive film 510 is bonded between the test card body 10 and the elastic silicone film 520, and the PET film 530 covers the side of the elastic silicone film 520 facing away from the groove 1311. The adhesive film 510 serves to bond the sealing membrane 50 to the test card body 10, thus sealing all the channels of the test card. The elastic silicone film 520 provides a sealing function, filling the groove 1311 with its own elasticity. The PET film 530 provides support and reset, ensuring that the sealing membrane 50 effectively resets after the external force is removed while deforming. Furthermore, the sealing membrane 50 uses a flat and large-area application method to seal the liquid channels 130 within the entire test card, further preventing air leakage. The sealing membrane 50 can also adopt other structural forms according to actual needs.

[0040] like Figure 3 As shown, the bottom of the groove 1311 has a protrusion 1312 that protrudes towards the sealing membrane side, and the protrusion is rib-shaped. When the sealing membrane is filled into the groove 1311, the protrusion 1312 is embedded in the sealing membrane 50, which makes the sealing effect of the test liquid pipeline 131 better.

[0041] like Figure 1 As shown, two support pillars 140 are provided in both the first waste liquid chamber 1334 and the second waste liquid chamber 1335. The support pillars 140 prevent the sealing membrane 50 on the test card from sinking into the waste liquid chamber 133 when air is drawn through the extraction port 120. The first waste liquid chamber 1334 and the second waste liquid chamber 1335 may also be equipped with more than one support pillar 140 as needed.

[0042] like Figure 1As shown, the blood gas biochemistry test card also includes a sampling needle 60, which is fixed to the sampling port 110 of the test card body 10 and connected to the syringe 70. The test solution is stored in the syringe 70.

[0043] like Figure 4 As shown, the present invention also provides a blood gas analyzer, including a reagent pack 80, a pump 90 and a blood gas biochemistry test card. The reagent pack 80 is provided with a first pin 810 communicating with a calibration liquid port 1321, and the pump 90 is provided with a second pin 910 communicating with a gas extraction port 120.

[0044] like Figure 5 As shown, when calibrating the electrode by drawing calibration solution, the test solution pipeline 131 is closed, and the reagent pack 80 operates, connecting the calibration solution pipeline 132 inside the reagent pack 80 with the calibration solution port 1321. The pump 90 is connected to the air extraction port 120, and the operation of the pump 90 creates negative pressure in the liquid pipeline 130, thereby causing the calibration solution to flow from the reagent pack 80 into the calibration solution pipeline 132 and the electrode pipeline 134 of the test card; as shown. Figure 6 As shown, after calibration, the reagent pack 80 operates to connect the air pipe inside the reagent pack 80 with the calibration liquid port 1321. The pump 90 continues to operate, creating negative pressure in the liquid pipe 130, causing air to flow from the reagent pack 80 into the calibration liquid pipe 132 and the electrode pipe 134. The calibration liquid is then drawn into the first waste liquid chamber 1334. Afterwards, the test solution is drawn, such as... Figure 7 As shown, when the test solution pipeline 131 is opened, the reagent pack 80 operates to close the pipeline inside the reagent pack 80 and the calibration solution port 1321. The pump 90 continues to operate to generate negative pressure in the liquid pipeline 130, thereby causing the test solution to flow from the sample inlet 110 into the test solution pipeline 131 and the electrode pipeline 134 to test the test solution. After the test is completed, the blood gas analyzer equipped with this blood gas biochemistry test card can avoid the problems of liquid leakage and contamination, and eliminate the hidden danger of debris contaminating the electrode and causing the test to be scrapped.

[0045] like Figure 1 and Figure 4 As shown, the blood gas analyzer also includes a sealing element 160, which is sleeved on the first pin 810 and the second pin 910. The outer wall of the test card body 10 is provided with a sealing groove 170 that matches the shape of the sealing element 160. This improves the effectiveness of the blood gas analyzer in preventing liquid leakage. Compared with traditional blood gas analyzers, the sealing element 160 of this invention seals the first pin 810 and the second pin 910 respectively, and is separate from the test card body 10. This ensures a tight seal while avoiding the risk of debris contaminating the electrodes and causing test failure. Furthermore, since the needle tips of the first pin 810 and the second pin 910 do not need to pierce the sealing plug, but are connected to the calibration liquid port 1321 and the air extraction port 120 respectively, the needle tips can be set to a pointed shape or a flat shape, or other shapes.

[0046] In this embodiment, the first pin 810 and the second pin 910 are sealed by the same sealing element 160. The blood gas analyzer can also be fitted with a sealing element on the first pin 810 and the second pin 910 respectively according to actual needs. The outer wall of the test card body 10 is provided with sealing grooves that correspond one-to-one with the sealing elements.

[0047] The blood gas analyzer also includes a drive device (not shown in the attached figure) that drives the pressure head 410 to reciprocate towards the groove 1311. The drive device drives the pressure member 40 to move, making the operation of the blood gas analyzer simpler.

[0048] In this embodiment, the drive device is an electric motor, and the pump 90 is a vacuum pump. The drive device and the pump 90 can also be configured in other forms according to actual needs.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A blood gas biochemistry test card, characterized in that, The test card body includes at least a sample inlet, an air extraction port, and a liquid pipeline, and an electrode circuit board disposed on the test card body. The liquid pipeline includes a waste liquid chamber, a test liquid pipeline connected at one end to the sample inlet, and an electrode pipeline connected at both ends to the waste liquid chamber and the test liquid pipeline, respectively. The electrode pipeline is connected to the electrode circuit board. The waste liquid chamber includes at least a first waste liquid chamber and a second waste liquid chamber arranged side by side, and a drain port connecting the first waste liquid chamber and the second waste liquid chamber. The first waste liquid chamber has a liquid inlet connected to the electrode pipeline, and the second waste liquid chamber has a liquid outlet connected to the air extraction port. The liquid outlet is located above the liquid inlet. The test card body is also provided with a calibration liquid port, and the liquid pipeline also includes a calibration liquid pipeline connected to the test liquid pipeline and the electrode pipeline. The highest point of the calibration liquid pipeline is higher than the liquid surface of the test liquid. The calibration fluid pipeline has an upward-facing anti-leakage groove recessed at the highest point of the liquid level, and there is a cross-sectional difference between the anti-leakage groove and the calibration fluid pipeline.

2. The blood gas biochemistry test card according to claim 1, characterized in that, Both the first waste liquid chamber and the second waste liquid chamber are equipped with support columns, and the drain outlet is located near the top of the first waste liquid chamber or the second waste liquid chamber.

3. The blood gas biochemistry test card according to claim 1, characterized in that, It also includes an electrode test slot, through which the bottom of the electrode pipe is connected to the electrode circuit board; The liquid inlet is located above the air extraction port, and the liquid outlet is located above the electrode channel; the liquid channel also includes a waste liquid channel, which is connected between the liquid outlet and the air extraction port; the blood gas biochemistry test card also includes an injection needle, which is fixed to the injection port of the test card body.

4. The blood gas biochemistry test card according to any one of claims 1 to 3, characterized in that, The inlet is located at the bottom of the first waste liquid chamber, and the outlet is located at the top of the second waste liquid chamber.

5. The blood gas biochemistry test card according to any one of claims 1 to 3, characterized in that, It also includes a pressure member and a sealing membrane to seal the liquid pipeline. The sealing membrane is an elastic composite membrane. The test liquid pipeline and the opposite side of the sealing membrane are provided with a groove. The sealing membrane is located between the groove and the pressure member. The pressure member is provided with a pressure head that matches the shape of the groove.

6. The blood gas biochemistry test card according to claim 5, characterized in that, The sealing film includes an adhesive film, an elastic silicone film, and a PET film. The adhesive film is bonded between the test card body and the elastic silicone film, and the PET film covers the side of the elastic silicone film facing away from the groove.

7. The blood gas biochemistry test card according to claim 5, characterized in that, The bottom of the groove has a protrusion that bulges towards the sealing membrane.

8. A blood gas analyzer, characterized in that, The device includes a reagent kit, a pump, and a blood gas biochemistry test card as described in any one of claims 1 to 7, wherein the blood gas biochemistry test card includes a test card body, and the test card body is further provided with a calibration liquid port; the reagent kit is provided with a first pin communicating with the calibration liquid port, and the pump is provided with a second pin communicating with the air extraction port.

9. The blood gas analyzer according to claim 8, characterized in that, It also includes a sealing element, which is sleeved on the first pin and the second pin, and the outer wall of the test card body is provided with a sealing groove that matches the shape of the sealing element; The blood gas analyzer also includes a pressure-retaining component and a sealing membrane to seal the liquid pipeline. The sealing membrane seals the liquid pipeline within the entire blood gas test card using a planar and large-area film application method. A groove is provided on the opposite side of the test liquid pipeline and the sealing membrane. The groove is located within the test liquid pipeline and is integral with it. The sealing membrane is located between the groove and the pressure-retaining component, which has a pressure head matching the shape of the groove. The sealing membrane is an elastic composite membrane, comprising an adhesive film, an elastic silicone film, and a PET film. The adhesive film is bonded between the test card body and the elastic silicone film, and the PET film covers the side of the elastic silicone film facing away from the groove. When the pressure-retaining component presses the sealing membrane towards the groove, the test liquid pipeline is closed. When the pressure-retaining component leaves the sealing membrane, the sealing membrane deforms elastically away from the groove, opening the test liquid pipeline. The bottom of the groove has a protrusion that bulges towards the sealing membrane. When the sealing membrane fills the groove, the protrusion is embedded within the sealing membrane. When extracting calibration solution to calibrate the electrode, the test solution pipeline is closed, the reagent pack is activated to connect the calibration solution pipeline inside the reagent pack with the calibration solution port, the pump is connected to the air extraction port, and the pump is activated to generate negative pressure in the liquid pipeline, thereby causing the calibration solution to flow from the reagent pack into the calibration solution pipeline and the electrode pipeline of the test card; After calibration, the reagent pack operates to connect the air pipe inside the reagent pack with the calibration liquid port, and the pump continues to operate to generate negative pressure in the liquid pipe, so that air flows from the reagent pack into the calibration liquid pipe and the electrode pipe, and the calibration liquid is pumped into the first waste liquid chamber. Then, the test solution is drawn, the test solution pipeline is opened, the reagent pack works to close the pipeline inside the reagent pack and the calibration solution port, the pump continues to work to generate negative pressure in the liquid pipeline, so that the test solution flows from the sample inlet into the test solution pipeline and the electrode pipeline to test the test solution; After the test is completed, the suction port and the calibration liquid port are disconnected from the external device. The calibration liquid is stored in the waste liquid chamber, and the test liquid is stored in the electrode pipe and the calibration liquid pipe. Since the outlet of the waste liquid chamber is located above the inlet, the calibration liquid cannot flow out from the outlet without external force. Therefore, the suction port connected to the outlet will not leak liquid, preventing liquid contamination. The highest point of the calibration liquid pipe, i.e., the top of the pipe, is higher than the surface of the test liquid. Without external force, the test liquid cannot flow past the highest point of the calibration liquid pipe, and the liquid will not leak from the calibration liquid port, preventing liquid contamination.

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