Blood gas analyzer and blood gas biochemical test card thereof

Abstract

The present application relates to a blood gas analyzer and a blood gas biochemical test card thereof, comprising at least a pressing part, a test card main body, a liquid pipeline arranged on the test card main body, an elastic part connected with the test card main body and sealing the liquid pipeline, and a recess arranged on the opposite surface of the liquid pipeline and the elastic part, wherein the elastic part is located between the recess and the pressing part, and the pressing part is provided with a pressure head matched with the shape of the recess. The recess is arranged in the liquid pipeline and integrated with the liquid pipeline, so that there is no extra cavity, no air bubbles are left, the amount of test liquid is reduced, and the test accuracy is improved. The test card main body does not need to be provided with an on-off switch rubber plug and a sealing film for covering the on-off switch rubber plug, so that the air leakage problem is avoided, the number of parts is reduced, the production is facilitated, and the product failure rate is reduced.

Description

[0001] This application is a divisional application of Chinese patent application filed on March 31, 2016, with application number 201610201438.5 and patent title "Blood Gas Analyzer and Blood Gas Biochemical Test Card Thereof". 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 before testing the test solution. Blood gas and biochemistry test cards typically introduce the test solution through a liquid pipeline, which is opened or closed by a rubber stopper on the test card body. To prevent leakage, a sealing film is usually adhered to the test card body to cover the rubber stopper. However, the sealing film is prone to poor adhesion, leading to air leakage. Furthermore, because the rubber stopper protrudes from the surface of the test card body, a large cavity needs to be left at the arched position of the sealing film. The test solution cannot completely fill this cavity, easily leaving air bubbles inside. These air bubbles can easily exchange gases with the test solution, potentially affecting the test results. Summary of the Invention

[0004] The purpose of this invention is to provide a blood gas analyzer and its blood gas biochemistry test card, which can avoid the problem of air leakage, improve the accuracy of testing, and facilitate production.

[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 pressure member, a test card body, a liquid pipe disposed on the test card body, and an elastic member connected to the test card body and sealing the liquid pipe. The liquid pipe and the elastic member have a groove on their opposite sides. The first elastic member is located between the groove and the pressure member. The pressure member has a pressure head that matches the shape of the groove.

[0007] When the test card draws calibration solution, the pressing component moves towards the groove. After the pressure head presses against the first elastic component, it moves the elastic component towards the groove as well. When the pressure head is in contact with the groove, the elastic component is pressed between the pressure head and the groove. The elastic component fills the groove with its own elastic deformation, closing the liquid channel. After the test card is calibrated with the calibration solution, when drawing test solution, the pressing component moves away from the groove and gradually moves away from the first elastic component until the external force on the elastic component is eliminated. Then, the elastic component moves away from the groove with its own elastic deformation, opening the liquid channel. The test solution flows into the test area of ​​the test card through the liquid channel. The groove is set in the liquid channel and forms an integral part with the liquid channel, eliminating unnecessary cavities and residual air bubbles. It also reduces the amount of test solution used and improves test accuracy. The test card body does not need to have a switch plug or a sealing membrane to cover the channel switch plug, avoiding air leakage, reducing the number of parts, facilitating production, and reducing the product defect rate.

[0008] The technical solution is further explained below:

[0009] Furthermore, the bottom of the groove has a protrusion that extends towards the first elastic element. When the elastic element is filled into the groove, the protrusion is inserted into the elastic element, resulting in a better sealing effect for the liquid pipeline.

[0010] Furthermore, the elastic element includes a first elastic element covering the groove and a second elastic element attached to the side of the first elastic element facing away from the groove. When the pressure head moves to fit into the groove, the first elastic element on the elastic element presses between the pressure head and the groove. The first elastic element fills the groove by its own elastic deformation, thus closing the liquid pipeline. After the test card is calibrated by the calibration liquid, when the test liquid is drawn, the pressing element moves away from the groove and gradually moves away from the elastic element until the external force on the elastic element is eliminated. Then, the elastic element is lifted by the elastic recovery of the second elastic element, which drives the first elastic element away from the groove. The second elastic element plays a supporting and restoring role, preventing the first elastic element from deforming while ensuring the effective restoring of the first elastic element after the external force is eliminated, thus improving the restoring effect of the first elastic element.

[0011] Furthermore, the first elastic membrane is an elastic silicone membrane, and the second elastic element is a PET membrane. The silicone membrane has strong elastic deformation capability and a long service life, extending the service life of the test card; the PET membrane has excellent mechanical properties, with high toughness, tensile strength, and impact resistance, and good resetting deformation effect.

[0012] Furthermore, the elastic membrane also includes an adhesive film, which is bonded between the test card body and the first elastic element. The adhesive film bonds the first elastic element to the test card body, facilitating production and assembly.

[0013] Furthermore, the groove is a spherical groove, and the pressure head is a spherical pressure head. The surface of the spherical groove is arc-shaped, making it easier for the first elastic element to fill the groove, resulting in a better sealing effect for the liquid pipeline.

[0014] The present invention also provides a blood gas analyzer, including a reagent pack, a pump and a blood gas biochemistry test card. The blood gas biochemistry test card is provided with a calibration liquid port connected to the reagent pack and an air extraction port connected to the pump. Both the calibration liquid port and the air extraction port are connected to one end of a liquid pipeline.

[0015] When drawing the calibration solution, the blood gas biochemistry test card closes the liquid pipeline through the pressure-retaining component. The suction port is connected to the pump. After the pump is powered on, a negative pressure is generated in the pipeline of the test card. The reagent pack works, causing the calibration solution to flow from the reagent pack into the test area of ​​the blood gas biochemistry test card through the calibration solution port. After calibration, the pump continues to work, causing the calibration solution to be drawn out of the test area of ​​the test card. The pressure-retaining component leaves the groove, and the test solution flows into the test area of ​​the test card under the action of negative pressure. The test area tests the test solution. Blood gas analyzers with this blood gas biochemistry test card have more accurate tests.

[0016] Furthermore, the blood gas analyzer also includes a drive mechanism that drives the pressure head to reciprocate towards one side of the groove. This drive mechanism simplifies the operation of the blood gas analyzer by moving the pressure component.

[0017] Furthermore, the drive unit is an electric motor, and the pump is a vacuum pump.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The groove of this invention is set in the liquid pipeline and forms an integral part of the liquid pipeline. There are no extra cavities and no residual air bubbles. At the same time, it reduces the amount of test liquid used and improves the test accuracy. The test card body does not need to be equipped with on / off switch rubber plugs and sealing films for covering channel switch rubber plugs, avoiding air leakage problems, reducing the number of parts, facilitating production, and reducing product defect rate. Attached Figure Description

[0020] 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;

[0021] Figure 2 for Figure 1 Sectional view along the AA direction;

[0022] Figure 3 for Figure 2 Enlarged view of point I;

[0023] Figure 4 This is a schematic diagram of the first working state of the pressing member and the groove in an embodiment of the present invention;

[0024] Figure 5This is a schematic diagram of the second working state of the pressing member and the groove in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the blood gas analyzer according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Pressing element, 110. Press head, 20. Test card body, 210. Liquid pipeline, 211. Groove, 220. Protrusion, 230. Calibration port, 240. Vacuum port, 250. Sample inlet, 30. First elastic element, 40. Adhesive film, 50. Second elastic element, 60. Injection needle, 70. Electrode circuit board, 80. Reagent pack, 90. Pump. Detailed Implementation

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0029] like Figures 1 to 3 As shown, a blood gas biochemistry test card includes at least a pressing member 10, a test card body 20, a liquid pipe 210 disposed on the test card body 20, and an elastic member connected to and sealing the liquid pipe 210. The liquid pipe 210 and the first elastic member have a groove 211 on their opposite sides. The elastic member is located between the groove 211 and the pressing member 10. The pressing member 10 has a pressure head 110 that matches the shape of the groove 211. The elastic member includes a first elastic member 30 covering the groove 211 and a second elastic member 50 attached to the side of the first elastic member 30 facing away from the groove. The first elastic member 30 and the second elastic member 50 are heat-pressed together to form an elastic composite film.

[0030] When drawing calibration solution from the test card, if Figure 4 As shown, the pressing member 10 moves towards the groove 211. After the pressing head 110 presses against the second elastic member 50 and the first elastic member 30, it drives the second elastic member 50 and the first elastic member 30 to move together towards the groove 211. When the pressing head 110 moves to fit against the groove 211, the first elastic member 30 is pressed between the pressing head 110 and the groove 211. The first elastic member 30 fills the groove 211 by its own elastic deformation, thus closing the liquid pipeline 210. After the test card is calibrated with the calibration solution, when the test solution is drawn, as... Figure 5As shown, the pressing member 10 moves away from the groove 211 and gradually moves away from the second elastic member 50 and the first elastic member 30 until the external force on the second elastic member 50 is eliminated. The second elastic member 50 then uses its own restoring deformation to make the first elastic member 30 leave the groove 211, thus opening the liquid pipe 210. The test liquid flows into the test part of the test card through the liquid pipe 210. The second elastic member 50 plays a supporting and restoring role, preventing the first elastic member 30 from deforming while ensuring the effective restoring of the first elastic member 30 after the external force is eliminated, thus improving the restoring effect of the first elastic member 30. Furthermore, the groove 211 is set in the liquid pipe 210 and forms an integral part with the liquid pipe 210, without any extra cavity or residual air bubbles. This also reduces the amount of test liquid used and improves the test accuracy. The test card body 20 does not need to be equipped with a switch plug and a sealing film to cover the channel switch plug, avoiding air leakage problems, reducing the number of parts, facilitating production, and reducing the product defect rate.

[0031] In this embodiment, the first elastic element 30 is an elastic silicone film 40. The silicone film 40 has strong elastic deformation capability and a long service life, extending the service life of the test card. Furthermore, the first elastic element 30 uses a flat and large-area film application method to seal the pipes inside the entire test card, further preventing air leakage. The second elastic element 50 is a PET film. PET film has excellent mechanical properties, including high toughness, tensile strength, and impact resistance, resulting in good reset deformation performance. The second elastic element 50 can also be made of other materials as needed. The elastic elements can also be configured to consist of at least one layer of elastic elements as needed.

[0032] like Figure 3 As shown, an adhesive film 40 is bonded between the test card body 20 and the first elastic element 30. The adhesive film 40 has a partial perforation at the position opposite to the groove 211 to prevent it from adhering to the groove 211 or the protrusion 220, which could cause the first elastic element 30 to fail to spring back. The adhesive film 40 bonds the first elastic element 30 to the test card body 20, facilitating production and assembly. The test card body 20 and the first elastic element 30 can also be sealed to the test liquid channel 210 through other connection methods.

[0033] like Figure 3 As shown, the bottom of the groove 211 is provided with a protrusion 220 that protrudes towards the first elastic member 30. The protrusion 220 is rib-shaped. When the first elastic member 30 fills the groove 211, the protrusion 220 is inserted into the first elastic member 30, which improves the sealing effect of the liquid pipe 210.

[0034] In this embodiment, the groove 211 is a spherical groove, and the pressure head 110 is a spherical pressure head 110. The surface of the spherical groove is arc-shaped, making it easier for the first elastic element 30 to fill the groove 211, thus improving the sealing effect of the liquid pipe 210. The groove 211 and the pressure head 110 can also be set to other shapes according to actual needs. Figure 1 As shown, the blood gas biochemistry test card also includes a sample injection needle 60 and an electrode circuit board 70. The electrode circuit board 70 is bonded to the other side of the test card body 20 away from the liquid pipeline 210 by an adhesive film 40. The sample injection needle 60 is fixed to the sample inlet 250 of the test card body 20 and is connected to a syringe or capillary tube. The test solution is stored in the syringe or capillary tube.

[0035] like Figure 6 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 blood gas biochemistry test card is provided with a calibration liquid port 220 connected to the reagent pack 80 and an air extraction port 240 connected to the pump 90. Both the calibration liquid port 220 and the air extraction port 240 are connected to one end of a liquid pipeline 210.

[0036] When the calibration solution is drawn, the blood gas biochemistry test card closes the liquid pipeline 210 through the pressure-retaining component 10. The air extraction port 240 is connected to the pump 90. After the pump 90 is powered on, a negative pressure is generated in the pipeline of the test card. The reagent pack 80 operates, causing the calibration solution to flow from the reagent pack 80 into the test section of the blood gas biochemistry test card through the calibration solution port 220. After calibration, the pump 90 continues to operate, causing the calibration solution to be drawn away from the test section of the test card. The pressure-retaining component 10 leaves the groove 211, and the test solution flows into the test section of the test card under the action of negative pressure. The test section tests the test solution. Blood gas analyzers with this blood gas biochemistry test card have more accurate tests.

[0037] The blood gas analyzer also includes a drive device (not shown in the attached figure) that drives the pressure head 110 to reciprocate towards the groove 211. The drive device simplifies the operation of the blood gas analyzer by moving the pressure member 10.

[0038] In this embodiment, the drive device is an electric motor, and the pump 90 is a vacuum pump 90. The drive device and the pump 90 can also be configured in other forms according to actual needs.

[0039] 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.

[0040] 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, used in a blood gas analyzer, characterized in that, The blood gas biochemistry test card includes a test card body, a liquid pipe disposed on the test card body, and an elastic member connected to the test card body and sealing the liquid pipe. The liquid pipe and the elastic member have a groove on their opposite surfaces. The blood gas analyzer includes a driving device that drives the pressure head of the pressure member to reciprocate toward one side of the groove. The elastic member is located between the groove and the pressure member, and the pressure head of the pressure member matches the shape of the groove. The elastic element includes a first elastic element covering the groove and a second elastic element attached to the side of the first elastic element facing away from the groove. The first elastic element is an elastic silicone film, and the second elastic element is a PET film. When the blood gas biochemistry test card draws calibration solution, the pressing element moves towards the groove. After the pressure head presses the second elastic element and the first elastic element, it drives the second elastic element and the first elastic element to move together towards the groove. When the pressure head moves to fit with the groove, the first elastic element on the elastic element presses between the pressure head and the groove. The first elastic element fills the groove by its own elastic deformation to close the liquid channel. When the blood gas biochemistry test card completes calibration with calibration solution, when drawing test solution, the pressing element can move away from the groove and gradually move away from the second elastic element and the first elastic element until the external force on the second elastic element is eliminated. The second elastic element uses its own reset deformation to make the first elastic element leave the groove, so that the liquid channel is opened and the test solution can flow into the test part of the blood gas biochemistry test card through the liquid channel. The elastic element also includes an adhesive film. The adhesive film is bonded between the test card body and the first elastic element. The first elastic element is bonded to the test card body through the adhesive film. The bottom of the groove is provided with a protrusion that protrudes towards one side of the elastic element. When the first elastic element fills the groove, the protrusion is inserted into the first elastic element. The adhesive film is partially hollowed out at the position opposite to the groove to prevent the adhesive film from sticking to the groove and the protrusion, so as to avoid the first elastic element from failing to rebound. The blood gas biochemistry test card also includes an injection needle and an electrode circuit board. The electrode circuit board is bonded to the other side of the test card body facing away from the liquid pipeline by another adhesive film. The injection needle is fixed to the injection port of the test card body and is used to communicate with a syringe or capillary.

2. The blood gas biochemistry test card according to claim 1, characterized in that, The first elastic element seals the entire pipe inside the test card using a planar and large-area film application method; the groove is a spherical groove, the pressure head is a spherical pressure head, and the surface of the spherical groove is an arc-shaped surface.

3. A blood gas biochemistry test card, used in a blood gas analyzer, characterized in that, The blood gas biochemistry test card includes at least a pressure member, a test card body, a liquid pipe disposed on the test card body, and an elastic member connected to the test card body and sealing the liquid pipe. The liquid pipe and the elastic member have a groove on their opposite sides. The elastic member is located between the groove and the pressure member. The pressure member has a pressure head that matches the shape of the groove. The bottom of the groove has a protrusion that protrudes toward one side of the elastic member. The elastic element includes a first elastic element covering the groove and a second elastic element attached to the side of the first elastic element facing away from the groove. The first elastic element seals the entire channel inside the blood gas biochemistry test card using a planar and large-area film application method. The first elastic element is an elastic silicone film, and the second elastic element is a PET film. The elastic element also includes an adhesive film. When the first elastic element fills the groove, the protrusion is inserted into the first elastic element. The adhesive film is bonded between the test card body and the first elastic element. The groove is a spherical groove, and the pressure head is a spherical pressure head. After the blood gas biochemistry test card is calibrated with the calibration solution, when the test solution is drawn, the pressure element can move away from the groove and gradually move away from the second elastic element and the first elastic element until the external force on the second elastic element is eliminated. The second elastic element then uses its own reset deformation to make the first elastic element leave the groove, thereby opening the liquid channel and allowing the test solution to flow into the test area of ​​the blood gas biochemistry test card through the liquid channel. The adhesive film is partially hollowed out at the position opposite to the groove to prevent the adhesive film from sticking to the groove and the protrusion, so as to avoid the first elastic element from failing to rebound. The blood gas biochemistry test card also includes an injection needle and an electrode circuit board. The electrode circuit board is bonded to the other side of the test card body facing away from the liquid pipeline by another adhesive film. The injection needle is fixed to the injection port of the test card body and is used to communicate with a syringe or capillary.

4. A blood gas biochemistry test card, characterized in that, The device includes a test card body, a liquid pipe disposed on the test card body, and an elastic member connected to the test card body and sealing the liquid pipe. The liquid pipe and the elastic member have a groove on their opposite sides. The elastic member is located between the groove and a mating pressing member. The pressing member has a pressure head that matches the shape of the groove. The elastic element includes a first elastic element covering the groove and a second elastic element attached to the side of the first elastic element facing away from the groove. The first elastic element is an elastic silicone film, and the second elastic element is a PET film. The bottom of the groove has a protrusion that protrudes towards the first elastic element. The elastic element also includes an adhesive film, which is bonded between the test card body and the first elastic element. The first elastic element is bonded to the test card body through the adhesive film, and the adhesive film is partially hollowed out at the position opposite to the groove. The blood gas biochemistry test card also includes an injection needle and an electrode circuit board. The electrode circuit board is bonded to the other side of the test card body facing away from the liquid pipeline by another adhesive film. The injection needle is fixed to the injection port of the test card body and is used to communicate with a syringe or capillary.

5. The blood gas biochemistry test card according to claim 4, characterized in that, The first elastic element seals the pipes inside the entire test card using a flat and large-area film application method.

6. The blood gas biochemistry test card according to claim 4, characterized in that, The groove is a spherical groove, the pressure head is a spherical pressure head, and the surface of the spherical groove is an arc-shaped surface.

7. A blood gas analyzer, comprising a reagent pack, a pump, a drive unit, and a blood gas biochemistry test card as described in any one of claims 1 to 6, characterized in that, The blood gas biochemistry test card is provided with a calibration liquid port connected to the reagent pack and an air extraction port connected to the pump. Both the calibration liquid port and the air extraction port are connected to one end of the liquid pipeline. The driving device is used to drive the pressure head to reciprocate towards one side of the groove. When the calibration solution is drawn, the blood gas biochemistry test card closes the liquid pipeline through the pressure-blocking component. The air extraction port is connected to the pump. After the pump is powered on, a negative pressure is generated in the pipeline of the test card. The reagent pack works to allow the calibration solution to flow from the reagent pack into the test site through the calibration solution port. After calibration, the pump continues to operate, causing the calibration solution to be drawn away from the test area of ​​the blood gas biochemistry test card. The pressure member leaves the groove, and the test solution flows into the test area of ​​the blood gas biochemistry test card under negative pressure.

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