Blood gas analyzer and blood gas biochemical test card thereof

Abstract

The present invention relates to a blood gas analyzer and a blood gas biochemical test card thereof, the blood gas analyzer at least comprises a pressing member, a test card main body, a liquid pipeline arranged on the test card main body, and an elastic member connected with the test card main body and sealing the liquid pipeline, the surface of the liquid pipeline opposite to the elastic member is provided with a groove, and the elastic member is located between the groove and the pressing member. The abutting piece is provided with a pressing head matched with the groove in shape. The groove is formed in the liquid pipeline and is integrated with the liquid pipeline, so that no redundant cavity exists, no bubble is left, meanwhile, the use amount of test liquid is reduced, and the test accuracy is improved; an on-off switch rubber plug and a sealing film used for covering the channel switch rubber plug do not need to be arranged on the test card body, the air leakage problem is avoided, the number of parts is reduced, production is convenient, and the product reject ratio is reduced.

Description

[0001] This application is a divisional application of the Chinese patent application with the application number 201610201438.5 and the patent title "Blood Gas Analyzer and Blood Gas Biochemical Test Card", which was filed with the Chinese Patent Office on March 31, 2016. Technical Field

[0002] The present invention relates to the field of medical technology, and particularly to a blood gas analyzer and a blood gas biochemical test card. Background Art

[0003] Blood gas biochemical test cards are widely used in the medical industry. The test card integrates biochemical test electrodes, is calibrated with the calibration solution in the reagent pack, and then the test solution is tested. The blood gas biochemical test card generally introduces the test solution through a liquid pipeline, and opens or closes the liquid pipeline by setting an on-off switch rubber plug on the test card body. In order to prevent liquid leakage, a sealing film is generally adhered to the test card body to cover the channel switch rubber plug. The sealing film is prone to poor adhesion and cause air leakage problems. Moreover, since the channel switch rubber plug protrudes from the surface of the test card body, a relatively large cavity needs to be reserved at the arched position of the sealing film, and the test solution cannot completely fill this cavity, and air bubbles are likely to remain in this cavity. These air bubbles are likely to exchange gas with the test solution, which is likely to affect the test results. Summary of the Invention

[0004] The purpose of the present invention is to provide a blood gas analyzer and a blood gas biochemical test card, which can avoid air leakage problems, improve test accuracy, and facilitate production.

[0005] To achieve the purpose of the present invention, the technical solution adopted is:

[0006] A blood gas biochemical test card at least includes a pressing member, a test card body, a liquid pipeline provided on the test card body, and an elastic member connected to the test card body and sealing the liquid pipeline. A groove is provided on the relative surface of the liquid pipeline and the elastic member. The first elastic member is located between the groove and the pressing member, and the pressing member is provided with a pressing head matching the shape of the groove.

[0007] When the test card draws the calibration liquid, the pressing member moves towards one side of the groove. After the pressing head presses the first elastic member, it drives the elastic member to move towards one side of the groove together. When the pressing head moves to fit with the groove, the elastic member is pressed between the pressing head and the groove, and the elastic member fills the groove by its own elastic deformation, closing the liquid pipeline; after the test card is calibrated with the calibration liquid, when drawing the test liquid, the pressing member moves towards the side away from the groove and gradually leaves the first elastic member. Until the external force on the elastic member is eliminated, the elastic member leaves the groove by its own elastic deformation, opening the liquid pipeline, and the test liquid flows into the test part of the test card through the liquid pipeline. The groove is arranged in the liquid pipeline and is integrated with the liquid pipeline, without redundant cavities and no residual bubbles. At the same time, the amount of test liquid used is reduced, improving the test accuracy; there is no need to set a on-off switch rubber plug and a sealing film for covering the channel switch rubber plug on the test card body, avoiding air leakage problems, reducing the number of parts, facilitating production, and reducing the defective rate of the product.

[0008] The technical solution is further described as follows:

[0009] Furthermore, a protruding portion protruding towards the first elastic member is provided at the bottom of the groove. When the elastic member fills the groove, the protruding portion is embedded in the elastic member, making the sealing effect of the liquid pipeline better.

[0010] Furthermore, the elastic member includes a first elastic member covering the groove and a second elastic member attached to the side of the first elastic member facing away from the groove. When the pressing head moves to fit with the groove, the first elastic member on the elastic member is pressed between the pressing head and the groove, and the first elastic member fills the groove by its own elastic deformation, closing the liquid pipeline; after the test card is calibrated with the calibration liquid, when drawing the test liquid, the pressing member moves towards the side away from the groove and gradually leaves the elastic member. Until the external force on the elastic member is eliminated, the elastic member drives the first elastic member to leave the groove by the self-elastic recovery of the second elastic member. The second elastic member plays a role of support and reset. While preventing the first elastic member from deforming, it ensures the effective reset of the first elastic member after the external force is eliminated, making the reset effect of the first elastic member better.

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

[0012] Furthermore, the elastic film further includes an adhesive film, and an adhesive film is bonded between the test card body and the first elastic member. The first elastic member is bonded to the test card body through the adhesive film, facilitating production and assembly.

[0013] Furthermore, the groove is a spherical groove and the indenter is a spherical indenter. The surface of the spherical groove is an arc surface, which makes it easier for the first elastic member to be filled onto the groove and results in a better sealing effect of the liquid pipeline.

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

[0015] When extracting the calibration liquid, the blood gas biochemical test card closes the liquid pipeline through the pressing member. The gas extraction port is communicated with the pump. After the pump is powered on and operates, a negative pressure is generated in the test card pipeline. The reagent pack operates to make the calibration liquid flow from the reagent pack into the test part of the blood gas biochemical test card through the calibration liquid port. After the calibration is completed, the pump continues to operate to extract the calibration liquid from the test part of the test card. The pressing member leaves the groove, and the test liquid flows into the test part of the test card under the action of the negative pressure. The test part tests the test liquid, and the blood gas analyzer with this blood gas biochemical test card has more accurate testing.

[0016] Furthermore, the blood gas analyzer further includes a driving device for driving the indenter to reciprocate towards one side of the groove. By driving the pressing member to move through the driving device, the operation of the blood gas analyzer is made simpler.

[0017] Furthermore, the driving device is a motor and the pump is a vacuum pump.

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

[0019] In the present invention, the groove is arranged in the liquid pipeline and is integrated with the liquid pipeline, without any redundant cavities, no air bubbles remaining, while reducing the usage amount of the test liquid and improving the testing accuracy; there is no need to set a on-off switch rubber plug and a sealing film for covering the channel switch rubber plug on the test card body, avoiding air leakage problems, reducing the number of parts, facilitating production, and reducing the defective rate of the product. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the blood gas biochemical test card according to an embodiment of the present invention;

[0021] Figure 2 is Figure 1 the sectional view taken along the A-A direction of

[0022] Figure 3 is Figure 2 the enlarged view of part I of

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

[0024] Figure 5Schematic diagram of the second working state of the pressing member and the groove in the embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the structure of the blood gas analyzer in the embodiment of the present invention.

[0026] Explanation of reference numerals:

[0027] 10. Pressing member, 110. Pressing head, 20. Test card body, 210. Liquid pipeline, 211. Groove, 220. Protrusion, 230. Calibration liquid port, 240. Air extraction port, 250. Sampling port, 30. First elastic member, 40. Adhesive film, 50. Second elastic member, 60. Sampling needle, 70. Electrode circuit board, 80. Reagent pack, 90. Pump. Detailed implementation manners

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

[0029] As Figures 1 to 3 shown, a blood gas biochemical test card includes at least a pressing member 10, a test card body 20, a liquid pipeline 210 provided on the test card body 20, and an elastic member connected to the test card body 20 and sealing the liquid pipeline 210. A groove 211 is provided on the opposite surface of the liquid pipeline 210 and the first elastic member. The elastic member is located between the groove 211 and the pressing member 10. The pressing member 10 is provided with a pressing head 110 matching 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 thermally pressed and fitted to form an elastic composite film.

[0030] When the test card extracts the calibration liquid, as Figure 4 shown, the pressing member 10 moves towards the groove 211. After the pressing head 110 presses 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 towards the groove 211 together. When the pressing head 110 moves to fit with 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, closing the liquid pipeline 210. After the test card is calibrated with the calibration liquid, when extracting the test liquid, as Figure 5As shown, the pressing member 10 moves away from the groove 211 and gradually separates from the second elastic member 50 and the first elastic member 30. Until after the external force on the second elastic member 50 is eliminated, the second elastic member 50 relies on its own reset deformation to make the first elastic member 30 leave the groove 211, opening the liquid pipeline 210. The test liquid flows into the test part of the test card through the liquid pipeline 210. The second elastic member 50 plays a supporting and resetting role, preventing the first elastic member 30 from deforming while ensuring the effective reset of the first elastic member 30 after the external force is eliminated, making the reset effect of the first elastic member 30 better; and the groove 211 is arranged in the liquid pipeline 210, integrated with the liquid pipeline 210, without redundant cavities, no air bubbles remaining, while reducing the amount of test liquid used and improving the test accuracy; there is no need to set an on-off switch rubber plug and a sealing film for covering the channel switch rubber plug on the test card body 20, avoiding air leakage problems, reducing the number of parts, facilitating production, and reducing the defective rate of the product.

[0031] In this embodiment, the first elastic member 30 is an elastic silica gel film 40. The silica gel film 40 has strong elastic deformation ability and long service life, extending the service life of the test card. And the first elastic member 30 seals the pipelines inside the entire test card by means of planar and large-area film sticking, further avoiding air leakage problems; the second elastic member 50 is a PET film. The PET film has excellent mechanical properties, with strong toughness, tensile strength and impact resistance, and good reset deformation effect. The second elastic member 50 can also be made of other materials according to actual needs. The first elastic member 30 and the second elastic member 50 can also be made of other materials according to actual needs. The elastic member can also be set to be composed of at least one layer of elastic members according to actual needs.

[0032] As Figure 3 shown, a glue film 40 is bonded between the test card body 20 and the first elastic member 30. The position of the glue film 40 opposite to the groove 211 is locally hollowed out to prevent the glue film 40 from sticking to the groove 211 and the protrusion 220, causing the problem that the first elastic member 30 cannot rebound. By bonding the first elastic member 30 to the test card body 20 through the glue film 40, it is convenient for production and assembly. The test liquid channel 210 can also be sealed between the test card body 20 and the first elastic member 30 by other connection methods.

[0033] As Figure 3 shown, a protrusion 220 protruding towards the first elastic member 30 is provided at the bottom of the groove 211. The protrusion 220 is in the shape of a rib. When the first elastic member 30 is filled into the groove 211, the protrusion 220 is embedded into the first elastic member 30, making the sealing effect of the liquid pipeline 210 better.

[0034] In this embodiment, the groove 211 is a spherical groove, and the indenter 110 is a spherical indenter 110. The surface of the spherical groove is an arc surface, which makes it easier for the first elastic member 30 to be filled onto the groove 211, and the sealing effect of the liquid pipeline 210 is better. The groove 211 and the indenter 110 can also be set to other shapes according to actual needs. As Figure 1 shown, the blood gas biochemical test card further includes a sampling needle 60 and an electrode circuit board 70. The electrode circuit board 70 is bonded to the other side of the test card main body 20 facing away from the liquid pipeline 210 through an adhesive film 40. The sampling needle 60 is fixed to the sampling port 250 of the test card main body 20 and is communicated with a syringe or a capillary tube. The test liquid is stored in the syringe or the capillary tube.

[0035] As Figure 6 shown, the present invention also provides a blood gas analyzer, which includes a reagent pack 80, a pump 90, and a blood gas biochemical test card. The blood gas biochemical test card is provided with a calibration liquid port 230 connected to the reagent pack 80 and a suction port 240 connected to the pump 90. The calibration liquid port 220 and the suction port 240 are both communicated with one end of the liquid pipeline 210.

[0036] When sucking the calibration liquid, the blood gas biochemical test card closes the liquid pipeline 210 through the pressing member 10. The suction port 240 is communicated with the pump 90. After the pump 90 is powered on and works, a negative pressure is generated in the test card pipeline. The reagent pack 80 works to make the calibration liquid flow from the reagent pack 80 into the test part of the blood gas biochemical test card through the calibration liquid port 220. After calibration is completed, the pump 90 continues to work to suck the calibration liquid away from the test part of the test card. The pressing member 10 leaves the groove 211, and the test liquid flows into the test part of the test card under the action of the negative pressure. The test part tests the test liquid, and the blood gas analyzer with this blood gas biochemical test card has more accurate testing.

[0037] The blood gas analyzer further includes a driving device (not marked in the attached drawing) for driving the indenter 110 to reciprocate toward the groove 211. By driving the pressing member 10 to move through the driving device, the operation of the blood gas analyzer is simpler.

[0038] In this embodiment, the driving device is a motor, and the pump 90 is a vacuum pump 90. The driving device and the pump 90 can also be set to other forms according to actual needs.

[0039] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief description, 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, it should be considered as the scope recorded in this specification.

[0040] The above-described embodiments merely represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A blood gas biochemical test card, which is applied to a blood gas analyzer, and is characterized in that, The blood gas biochemical test card includes a test card main body, a liquid pipeline provided on the test card main body, and an elastic member connected to the test card main body and sealing the liquid pipeline. A groove is provided on the opposite surface of the liquid pipeline and the elastic member. The blood gas biochemical test card further includes a sampling needle, and the sampling needle is provided on the test card main body; The elastic member includes a first elastic member covering the groove and a second elastic member attached to the side of the first elastic member facing away from the groove. The first elastic member is an elastic silica gel film, and the second elastic member is a PET film. When the blood gas test card aspirates the calibration liquid, the elastic member can be pressed tightly by a pressing member, and the pressing member drives the elastic member to move together toward the groove side. The pressing member is provided with a pressing head matching the shape of the groove. When the pressing head moves to fit with the groove, the first elastic member on the elastic member is pressed tightly between the pressing head and the groove. The elastic silica gel film fills the groove by its own elastic deformation to close the liquid pipeline. When the blood gas test card completes calibration with the calibration liquid and then aspirates the test liquid, the pressing member can move away from the groove side and gradually leave the first elastic member. Until the external force on the elastic member is eliminated, the elastic member drives the first elastic member to leave the groove by the self-elastic recovery of the PET film, so that the liquid pipeline is opened and the test liquid flows into the test part of the test card through the liquid pipeline; The elastic member further includes a glue film. The glue film is bonded between the test card main body and the first elastic member. The first elastic member is bonded to the test card main body through the glue film. A protruding portion protruding toward the elastic member side is provided at the bottom of the groove. When the first elastic member fills the groove, the protruding portion is inserted into the first elastic member to seal the liquid pipeline. The position of the glue film opposite to the groove is partially hollowed out to prevent the glue film from sticking to the groove and the protruding portion, so as to avoid the first elastic member from not being able to rebound.

2. The blood gas biochemical test card according to claim 1, wherein The first elastic member seals the pipelines in the entire test card by adopting a plane and large-area film sticking method; the groove is a spherical groove, the pressing head is a spherical pressing head, and the surface of the spherical groove is an arc surface.

3. A blood gas biochemical test card, applied to a blood gas analyzer, wherein The blood gas biochemical test card at least includes a pressing member, a test card main body, a liquid pipeline provided on the test card main body, and an elastic member connected to the test card main body and sealing the liquid pipeline. A groove is provided on the opposite surface of the liquid pipeline and the elastic member. The elastic member is located between the groove and the pressing member. The pressing member is provided with a pressing head matching the shape of the groove. A protruding portion protruding toward the elastic member side is provided at the bottom of the groove; The elastic member includes a first elastic member covering the groove and a second elastic member attached to the side of the first elastic member facing away from the groove. The first elastic member seals the pipelines in the whole blood gas biochemical test card by means of a flat surface and a large-area film. The first elastic member is an elastic silica gel film, and the second elastic member is a PET film. The elastic member further includes an adhesive film. When the first elastic member is filled into the groove, the protrusion is embedded into the first elastic member to seal the liquid pipeline. The adhesive film is bonded between the test card body and the first elastic member. The groove is a spherical groove, and the pressing head is a spherical pressing head. After the blood gas test card is calibrated with the calibration liquid, when the test liquid is extracted, the pressing member can move away from the groove and gradually leave the first elastic member. After the external force on the elastic member is eliminated, the elastic member deforms elastically by itself to make the elastic member leave the groove so that the liquid pipeline is opened, and then the test liquid flows into the test part of the test card through the liquid pipeline. A protrusion protruding toward the elastic member is provided at the bottom of the groove. When the first elastic member is filled into the groove, the protrusion is embedded into the first elastic member to seal the liquid pipeline. The position of the adhesive film opposite to the groove is partially hollowed out to prevent the adhesive film from sticking to the groove and the protrusion, so as to avoid the first elastic member from not being able to rebound.

4. A blood gas analyzer, comprising a reagent pack, a pump, a driving device, and the blood gas biochemical test card according to any one of claims 1 to 3, characterized in that the blood gas biochemical test card is provided with a calibration liquid port connected to the reagent pack and a suction port connected to the pump. Both the calibration liquid port and the suction port are communicated with one end of the liquid pipeline. The driving device is used to drive the pressing head to make a reciprocating motion toward the groove side. When extracting the calibration liquid, the blood gas biochemical test card closes the liquid pipeline through the pressing member. The suction port is communicated with the pump. After the pump is powered on, a negative pressure is generated in the test card pipeline, and the reagent pack works to make the calibration liquid flow from the reagent pack into the test part through the calibration liquid port. After calibration is completed, the pump continues to work to draw the calibration liquid away from the test part of the blood gas biochemical test card. The pressing member leaves the groove, and the test liquid flows into the test part of the blood gas biochemical test card under the action of negative pressure.

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