Blood gas biochemical reagent card and blood gas biochemical analyzer

Abstract

The invention discloses a blood gas biochemical reagent card and a blood gas biochemical analyzer. The reagent card comprises a reagent card body, an electrode plate arranged on one side of the reagent card body and a negative pressure generating device, the reagent card body is provided with a flow channel for a calibration liquid and / or a sample to flow, the negative pressure generation device comprises a first sleeve embedded in the reagent card body and a pull rod assembly used for moving in the first sleeve, and the liquid inlet end of the first sleeve is communicated with the liquid outlet end of the waste liquid flow channel; the pull rod assembly is used for generating negative pressure under the condition that the pull rod assembly moves away from the liquid outlet end of the waste liquid runner. According to the reagent card, a negative pressure pump does not need to be arranged at the liquid outlet end of the waste liquid flow channel, the outlet end of the negative pressure generation device does not need to be sealed, compared with the prior art, the number of seals is reduced, and the problems that in the prior art, structural design is complex, and instrument operation stability and reliability are poor are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of in vitro diagnostic instruments, and particularly relates to a blood gas biochemical reagent card and a blood gas biochemical analyzer. Background Art

[0002] A blood gas analyzer is an instrument for blood gas detection, which mainly includes a reagent pack, a reagent card and a measurement component. The reagent card is internally provided with a curved flow channel and an electrode plate. The flow channel usually has two liquid inlets and one liquid outlet. One of the liquid inlets is communicated with the reagent pack for introducing the calibration liquid inside the reagent pack into the reagent card to calibrate the electrode plate; the other liquid inlet is communicated with the sample tube for introducing the fluid sample in the sample tube into the reagent card to measure the sample.

[0003] In the reagent card provided by the prior art, the sample needs to be pushed into the flow channel where the electrode plate is located by the negative pressure generated by a negative pressure pump provided at the liquid outlet. Both the liquid outlet communicated with the negative pressure pump and the liquid inlet communicated with the reagent pack need to be sealed, which increases the complexity of the instrument design and the cost, and is not conducive to the stability and reliability of the instrument operation. Summary of the Invention

[0004] The present application discloses a blood gas biochemical reagent card and a blood gas biochemical analyzer to solve the problems of complex structural design, poor stability and reliability of instrument operation in the prior art.

[0005] In the first aspect of the present application, a blood gas biochemical reagent card is provided, including: a reagent card body, an electrode plate provided on one side of the reagent card body, and a negative pressure generating device;

[0006] The reagent card body is provided with a flow channel for the calibration liquid and / or the sample to flow through. The flow channel includes: a calibration liquid flow channel for communicating with an external reagent pack; a sample flow channel for communicating with an external sample tube; an electrode plate flow channel for covering the electrode part on one side of the electrode plate, and its liquid inlet end is communicated with the liquid outlet end of the calibration liquid flow channel and / or the sample flow channel; a waste liquid flow channel communicated with the liquid outlet end of the electrode plate flow channel;

[0007] The negative pressure generating device includes a first sleeve embedded in the reagent card body and a pull rod assembly for moving inside the first sleeve. The liquid inlet end of the first sleeve is communicated with the liquid outlet end of the waste liquid flow channel, and the pull rod assembly is used to generate negative pressure when moving away from the liquid outlet end of the waste liquid flow channel.

[0008] Optionally, the pull rod assembly includes: a piston and a pull rod connected to the piston, and the piston has an interference fit with the first sleeve.

[0009] Optionally, the first sleeve includes: a first region and a second region that are adjacent to each other and separated by the piston, where the first region is close to the liquid outlet end of the waste liquid flow channel and is used to accommodate waste liquid, and the second region is used to accommodate a part of the pull rod.

[0010] Optionally, the reagent card body has a front surface for setting the flow channel and a back surface opposite to the front surface, and the back surface is provided with criss-cross reinforcing ribs.

[0011] Optionally, the electrode plate is arranged close to the bottom of the reagent card body, and the first sleeve is arranged at a position between the electrode plate and the top of the reagent card body.

[0012] Optionally, an anti-backflow groove with an upward opening is arranged on the calibration liquid flow channel.

[0013] Optionally, it further includes a flow channel switching component, and the flow channel switching component is used to disconnect or connect the sample flow channel.

[0014] Optionally, the sample flow channel includes a first section of flow channel and a second section of flow channel that are staggeredly disconnected;

[0015] The flow channel switching component is arranged at the staggeredly disconnected position of the first section of flow channel and the second section of flow channel. The flow channel switching component includes a second sleeve embedded in the reagent card body and a sliding member for moving inside the second sleeve, and the sliding member is used to connect the staggeredly disconnected position of the sample flow channel.

[0016] Optionally, a first small hole is arranged at the liquid outlet end of the first section of flow channel, a second small hole is arranged at the liquid inlet end of the second section of flow channel, and both the first small hole and the second small hole are communicated with the second sleeve;

[0017] A conduction groove is formed on the surface of the sliding member, and the conduction groove is used to connect the first small hole and the second small hole.

[0018] In the second aspect of the present application, a blood gas and biochemical analyzer is provided, which includes the blood gas and biochemical reagent card provided by any one of the implementation manners of the first aspect.

[0019] As can be seen from the above technical solutions, the reagent card provided by the present application does not need to be provided with a negative pressure pump at the liquid outlet end of the waste liquid flow channel, and the outlet end of the negative pressure generating device does not need to be sealed. For the reagent card, only one position, namely the inlet end of the reagent pack and the calibration liquid flow channel, needs to be sealed. Compared with the prior art, the number of seals is reduced; in addition, the prior art usually has a waste liquid storage tank, and this reagent card does not need to be provided with a separate waste liquid storage tank, and the problem of waste liquid storage can be solved, thereby solving the problems of complex structural design, poor operation stability and reliability of the instrument in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the three-dimensional structure of a blood gas biochemical reagent card provided by an embodiment of the present application;

[0021] Figure 2 Another schematic diagram of the three-dimensional structure of a blood gas biochemical reagent card provided by an embodiment of the present application;

[0022] Figure 3 Schematic diagram of the front view structure of a blood gas biochemical reagent card provided by an embodiment of the present application;

[0023] Figure 4 Schematic diagram of the structure of a pull rod assembly provided by an embodiment of the present application;

[0024] Figure 5 Schematic diagram of the working state of a negative pressure generating device provided by an embodiment of the present application;

[0025] Figure 6 Schematic diagram of the structure of a sliding member provided by an embodiment of the present application;

[0026] Figure 7a Schematic diagram of the structure of a flow channel switching assembly in the first working position provided by an embodiment of the present application;

[0027] Figure 7b Schematic diagram of the structure of a flow channel switching assembly in the second working position provided by an embodiment of the present application;

[0028] Figure 7c Schematic diagram of the structure of a flow channel switching assembly in the third working position provided by an embodiment of the present application.

[0029] Reference numerals: 1 - reagent card body; 2 - electrode plate; 3 - negative pressure generating device; 4 - flow channel switching assembly; 10 - flow channel; 11 - calibration liquid flow channel; 12 - sample flow channel; 13 - electrode plate flow channel; 14 - waste liquid flow channel; 101 - front side; 102 - back side; 1021 - reinforcing rib; 111 - anti - reflux groove; 121 - first - stage flow channel; 122 - second - stage flow channel; 1211 - first small hole; 1221 - second small hole; 31 - first sleeve; 32 - pull rod assembly; 311 - first region; 312 - second region; 321 - piston; 322 - pull rod; 41 - second sleeve; 42 - sliding member; 421 - conduction groove; 422 - auxiliary groove; 423 - protrusion; 4201 - conduction section; 4202 - auxiliary section; 42021 - first auxiliary section; 42022 - second auxiliary section. Detailed implementation manners

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Referring Figures 1 - 3 to the structural schematic diagram shown, an embodiment of the present application provides a blood gas biochemical reagent card, including: a reagent card body 1, an electrode plate 2 disposed on one side of the reagent card body 1, and a negative pressure generating device 3.

[0032] The reagent card body 1 is provided with a flow channel 10 for the flow of calibration liquid and / or sample. The flow channel 10 includes: a calibration liquid flow channel 11 for communicating with an external reagent pack; a sample flow channel 12 for communicating with an external sample tube; an electrode plate flow channel 13 for covering the electrode part on one side of the electrode plate, and its liquid inlet end is communicated with the liquid outlet end of the calibration liquid flow channel 11 and / or the sample flow channel 12; and a waste liquid flow channel 14 communicated with the liquid outlet end of the electrode plate flow channel 13.

[0033] The negative pressure generating device 3 includes a first sleeve 31 embedded in the reagent card body 1 and a pull rod assembly 32 for moving inside the first sleeve 31. The liquid inlet end of the first sleeve 31 is communicated with the liquid outlet end of the waste liquid flow channel 14, and the pull rod assembly 32 is used to generate negative pressure when moving away from the liquid outlet end of the waste liquid flow channel 14.

[0034] In this embodiment, the reagent card body 1 has a rectangular structure. There is a reagent card holder on the blood gas analyzer for inserting the reagent card. The reagent card is a consumable and is usually only used for performing a blood gas test once.

[0035] The reagent pack is disposed at one side of the reagent card. The liquid inlet end of the calibration liquid flow channel 11 is disposed at the bottom of the reagent card body 1. When the reagent card is inserted into the reagent card holder, the liquid outlet end of the reagent pack can be communicated with the liquid inlet end of the calibration liquid flow channel 11. The calibration liquid flow channel 11 is not only used for introducing calibration liquid, but also for introducing air. The introduced air can empty the calibration liquid in the partial connection pipeline between the reagent pack and the reagent card, the calibration liquid flow channel 11, and the electrode plate flow channel 13.

[0036] When the reagent card is inserted into the reagent card holder, a part of the reagent card is exposed outside the reagent card holder. The liquid inlet end of the sample flow channel 12 is disposed on the exposed part of the reagent card for connection with an external sample tube. Usually, the liquid inlet end of the sample flow channel 12 is disposed at the top of the reagent card body 1, and a stainless steel syringe needle is disposed at its top. The stainless steel syringe needle is connected to the outlet of the sample tube for the inflow of the sample.

[0037] In this embodiment, the first sleeve 31 is integrally formed with the reagent card body 1. A pull rod assembly 32 is arranged inside the first sleeve 31 to form a negative pressure generating device 3. The pull rod assembly 32 is as shown in Figure 4 As shown, the pull rod assembly 32 generates negative pressure during the moving process, so that the calibration liquid in the calibration liquid flow channel 11 or the sample in the sample flow channel 12 flows through the electrode plate flow channel 13 and the waste liquid flow channel 14, and finally is discharged from the liquid outlet end of the waste liquid flow channel 14. Further, the liquid outlet end of the waste liquid flow channel 14 is communicated with the liquid inlet end of the first sleeve 31. During the moving process of the pull rod assembly 32, it gradually moves away from its liquid inlet end, then the area between the pull rod assembly 32 and the liquid inlet end of the first sleeve 31 gradually increases, and this area is used to store the waste liquid discharged from the waste liquid flow channel 14.

[0038] It can be seen from the above technical solutions that the reagent card provided by the present application does not need to be provided with a negative pressure pump at the liquid outlet end of the waste liquid flow channel 14, and the outlet end of the negative pressure generating device 3 does not need to be sealed. For the reagent card, only the position between the reagent pack and the liquid inlet end of the calibration liquid flow channel 11 needs to be sealed. Compared with the prior art, only one port needs to be sealed, reducing the number of seals, and the design is simple and reliable; in addition, the prior art usually has a waste liquid storage tank. This reagent card does not need to be provided with a separate waste liquid storage tank, and can solve the problem of waste liquid storage, thus solving the problems of complex structure design, poor operation stability and reliability of the instrument in the prior art.

[0039] Referring to Figure 4 As shown in the structural schematic diagram, the pull rod assembly 32 includes: a piston 321 and a pull rod 322 connected to the piston 321. The piston 321 has an interference fit with the first sleeve 31; the pull rod 322 is used to move under the drive of a driving member, so as to drive the piston 321 to slide inside the first sleeve 31. In the working state, the piston 321 slides horizontally. Assuming that the piston 321 slides horizontally to the right from the liquid inlet end of the first sleeve 31, the piston 321 has an interference fit with the first sleeve 31, so that the left side of the piston 321 is in a sealed state. In this way, when the piston 321 slides to the right, negative pressure can be generated on the left side.

[0040] Among them, the driving member can be a motor or other devices that can provide power, which is not limited here.

[0041] Referring to Figure 5 As shown in the structural schematic diagram, Figure 5 (A) shows the structural schematic diagram of the negative pressure generating device 3 in the initial state. At this time, the piston 321 is located at the liquid inlet end of the first sleeve 31; when the piston 321 slides horizontally inside the first sleeve 31, as shown in Figure 5As shown in (B), the inner space of the first sleeve 31 is divided into two parts by the piston 321. Thus, the first sleeve 31 includes a first region 311 and a second region 312 that are adjacent and separated by the piston 321. The first region 311 is close to the liquid outlet end of the waste liquid flow channel 14 and is used to accommodate waste liquid, and the second region 312 is used to accommodate a part of the pull rod 322. As the piston 321 moves towards the outlet direction of the first sleeve 31, the first region 311 gradually increases, and the second region 312 gradually decreases. As shown in Figure 5 (C), the gradually increasing first region 311 is large enough to accommodate the waste liquid generated during the test.

[0042] In addition, the pull rod 322 and the piston 321 are designed to be separable, and the pull rod 322 can be reused, while the piston 321 is usually a consumable for one-time use.

[0043] Referring to Figure 2 the structural schematic diagram shown, the reagent card body 1 has a front surface 101 for setting the flow channels 10 and a back surface 102 opposite to the front surface 101. The back surface 102 is provided with criss-cross reinforcing ribs 1021, and the reinforcing ribs 1021 can increase the rigidity of the reagent card body 1; the first sleeve 31 protrudes from the back surface 102 of the reagent card body 1. The main part of the front surface 101 is a plane, on which a groove is opened, and then a film is pasted on this plane. A calibration liquid flow channel 11, a sample flow channel 12, and a waste liquid flow channel 14 are formed between the film and the opened groove.

[0044] Referring to Figure 2 the structural schematic diagram shown, the electrode plate 2 is arranged close to the bottom of the reagent card body 1, and the first sleeve 31 is arranged at the position between the electrode plate 2 and the top of the reagent card body 1. In order to minimize the length of the waste liquid flow channel 14, the first sleeve 31 is arranged close to the electrode plate 2, so that after the calibration liquid or the sample flows out of the electrode plate flow channel 13, it can flow into the first region 311 of the first sleeve 31 in the shortest possible time.

[0045] In this embodiment, a groove is opened on the back surface of the reagent card body 1 corresponding to the electrode plate 2. After the electrode plate 2 is pasted on the back surface of the reagent card body 1, the electrode plate flow channel 13 is formed. Except for the electrode plate flow channel 13, the other flow channels are arranged around the periphery of the electrode plate 2.

[0046] In order to prevent the liquid in the electrode plate flow channel 13 from flowing back into the calibration liquid flow channel 11, the calibration liquid flow channel 11 is bent so that its highest point is higher than the liquid inlet end of the electrode plate flow channel 13, and a backflow prevention groove 111 with an upward opening is arranged at the highest point.

[0047] In the prior art, in order to enable the calibration solution and the sample to flow through the electrode plate successively, the reagent card needs to rely on a pressing valve arranged outside the reagent card to control the on-off of the flow channel. For example, when the pressing valve is closed, the sample is blocked from reaching the flow channel where the electrode plate is located, and at this time, the calibration solution is allowed to be introduced; when the pressing valve is opened, the sample is allowed to enter the flow channel where the electrode plate is located. However, the pressing direction of the pressing valve is usually perpendicular to the flow direction of the flow channel, and this structure that controls the on-off of the flow channel by pressing makes the overall structural design of the instrument relatively complex.

[0048] To solve the above problems, the blood gas biochemical reagent card provided in this embodiment is further provided with a flow channel switching component 4, and the flow channel switching component 4 is used to disconnect or connect the sample flow channel 12.

[0049] Referring to Figure 1 and Figure 3 In the structural schematic diagram shown, the sample flow channel 12 is at least divided into two segments, namely a first segment flow channel 121 and a second segment flow channel 122, and the two segments are arranged in an interleaved manner to form a staggered disconnection point.

[0050] Referring to Figure 2 In the structural schematic diagram shown, the flow channel switching component 4 is arranged at the staggered disconnection point of the sample flow channel 12. The flow channel switching component 4 includes a second sleeve 41 embedded in the reagent card body 1 and a sliding member 42 for moving inside the second sleeve 41. The sliding member 42 is used to connect the staggered disconnection point of the sample flow channel 12. For the convenience of processing, the connection line of the free ends of the two segments is parallel to the bottom of the reagent card body 1. A first small hole 1211 is arranged at the liquid outlet end of the first segment flow channel 121, and a second small hole 1221 is arranged at the liquid inlet end of the second segment flow channel 122. Both the first small hole 1211 and the second small hole 1221 are communicated with the second sleeve 41.

[0051] In this embodiment, the sliding member 42 has at least two working positions. In the initial state, the sliding member 42 is in the first working position. At this time, the two small holes are not communicated, the sample flow channel 12 is in a disconnected state, and the calibration solution flow channel 11 is in a connected state; subsequently, the sliding member 42 is pushed to the second working position. At this time, the two small holes are communicated, and the sample flow channel 12 is in a connected state.

[0052] In a feasible manner, the sliding member 42 is a rubber plug. As Figure 6 shown, a conduction groove 421 is arranged on the surface of the rubber plug. The width of the conduction groove 421 is greater than or equal to the width of the disconnection point of the sample flow channel 12. When in the second working position, the conduction groove 421 is facing the disconnection point. The sample enters the conduction groove 421 through one of the small holes and then flows into the other segment of the sample flow channel 12 through the other small hole. Thus, the sample flow channel 12 is in a connected state.

[0053] In the first working position, if the sliding member 42 extends between the first flow channel 121 and the second flow channel 122, only the second flow channel 122 is sealed, and the liquid outlet end of the first flow channel 121 is open. In this case, the sample will not flow towards the liquid outlet end without the action of negative pressure. However, in order to prevent liquid leakage caused by sample flow, in this embodiment, the length of the sliding member 42 is extended by a section. Refer to Figure 6 As shown in the structural schematic diagram, the sliding member 42 has a conducting section 4201 and an auxiliary section 4202. The conducting section 4201 is used to open the conducting groove 421, and the auxiliary section 4202 is used to extend directly below the first flow channel 121 in the first working position so as to seal the first flow channel 121. In this state, the conducting section 4201 can seal the second flow channel 122, and the conducting groove 421 can communicate with the second small hole 1221 but not with the first small hole 1211, so that the first flow channel 121 and the second flow channel 122 are disconnected.

[0054] In this embodiment, in the second working position, the left end surface of the sliding member 42 contacts the left end surface of the second sleeve. According to the distance between the first small hole 1211 and the second small hole 1221 and the length of the sliding member 42, the length of the sleeve 31 can be set. In this way, the moving distance of the second working position relative to the first working position can be determined, thereby guiding the pushing distance of the guide rod. The above structure and stroke design are simple and reliable.

[0055] In order to disconnect the first flow channel 121 and the second flow channel 122 again after the blood gas detection, the sliding member 42 further has a third working position. The first working position, the second working position, and the third working position are arranged in sequence, and the first working position is close to the edge position of the reagent card body 1. The sliding member 42 has a conducting section 4201 and two auxiliary sections 4202. The two auxiliary sections 4202 are symmetrically arranged and are respectively a first auxiliary section 42021 and a second auxiliary section 42022; the conducting section 4201 is used to open the conducting groove 421, the first auxiliary section 42021 is used to work in the first working position, and the second auxiliary section 42022 is used to work in the third working position.

[0056] Refer to Figure 7a As shown in the structural schematic diagram, in the first working position, the auxiliary section 42021 extends directly below the first flow channel 121 so as to seal the first flow channel 121. The first small hole 1211 and the second small hole 1221 cannot communicate, and the second flow channel 122 where the second small hole 1221 is located is sealed. Therefore, the sample flow channel 12 is disconnected.

[0057] Refer to Figure 7bThe structural schematic diagram shown. When in the second working position, the conduction section 4201 slides to directly below the dislocation disconnection between the first-section flow channel 121 and the second-section flow channel 122, the first small hole 1211 and the second small hole 1221 are connected, and the sample flow channel 12 is in a connected state.

[0058] Referring to Figure 7c the structural schematic diagram shown. When in the third working position, the second auxiliary section 42022 on the right side is directly below the second-section flow channel 122. At this time, the first-section flow channel 121 and the second-section flow channel 122 are not connected, and both flow channels are sealed, so as to seal the sample flow channel after the test is completed.

[0059] In addition, for convenient processing, an auxiliary groove 422 can be opened on one side of the auxiliary section 4202. The auxiliary groove 422 is not continuous with the conduction groove 421, and the width of the auxiliary groove is smaller than the width of the disconnection, which does not affect the on-off function of the sliding member.

[0060] In this embodiment, the second sleeve 41 and the reagent card body 1 are integrally formed, and the sliding member 42 is slidably arranged inside the second sleeve 41. To facilitate the sliding of the sliding member 42, a guiding groove (not shown in the figure) is opened inside the second sleeve 41, and a protruding portion 423 corresponding to the guiding groove is provided on the sliding member 42. A guide rod is arranged on the opening side of the second sleeve 41, and the guide rod is used to push the sliding member 42 to switch between different working positions.

[0061] In this embodiment, for convenient processing and driving, the first sleeve 31 and the second sleeve 41 are arranged in parallel, and the openings face the same side of the reagent card. The first sleeve 31 can be driven by the same driving member or can be driven by a driving member respectively. The present application does not make specific limitations.

[0062] It can be seen from the above technical solutions that in this embodiment, the design of moving the rubber stopper left and right is more reliable than the pressing type sealing in the prior art, and can be designed in linkage with the negative pressure piston, which saves more design space and cost.

[0063] The embodiment of the present application also provides a blood gas and biochemical analyzer, which is characterized by including Figure 1 the blood gas and biochemical reagent card provided by any one of the above embodiments. This blood gas and biochemical analyzer has all the technical effects of the above blood gas and biochemical reagent card, which will not be elaborated here.

[0064] The above are only the embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention pending approval.

Claims

1. A blood gas biochemical reagent card, characterized in that, Comprising: A reagent card body, an electrode plate disposed on one side of the reagent card body, and a negative pressure generating device; The reagent card body is provided with a flow channel for the calibration liquid and the sample to flow through. The flow channel includes: a calibration liquid flow channel for communicating with an external reagent pack; a sample flow channel for communicating with an external sample tube; an electrode plate flow channel for covering an electrode portion on one side of the electrode plate, and its liquid inlet end is communicated with the liquid outlet ends of the calibration liquid flow channel and the sample flow channel; a waste liquid flow channel communicated with the liquid outlet end of the electrode plate flow channel; The negative pressure generating device includes a first sleeve embedded in the reagent card body and a pull rod assembly for moving inside the first sleeve. The liquid inlet end of the first sleeve is communicated with the liquid outlet end of the waste liquid flow channel, and the pull rod assembly is used for generating negative pressure when moving away from the liquid outlet end of the waste liquid flow channel.

2. The blood gas biochemical reagent card according to claim 1, wherein, The pull rod assembly includes: a piston and a pull rod connected to the piston, and the piston has an interference fit with the first sleeve.

3. The blood gas biochemical reagent card according to claim 2, characterized in that, The first sleeve includes: a first region and a second region adjacent to each other separated by the piston. The first region is close to the liquid outlet end of the waste liquid flow channel and is used for accommodating waste liquid, and the second region is used for accommodating a part of the pull rod.

4. The blood gas biochemical reagent card according to claim 1, characterized in that, The reagent card body has a front surface for setting the flow channel and a back surface opposite to the front surface, and the back surface is provided with criss-cross reinforcing ribs.

5. A blood gas biochemical reagent card according to claim 1, characterized in that, The electrode plate is disposed close to the bottom of the reagent card body, and the first sleeve is disposed at a position between the electrode plate and the top of the reagent card body.

6. The blood gas biochemical reagent card according to claim 1, characterized in that, The calibration liquid flow channel is provided with a backflow prevention groove with an opening upward.

7. A blood gas biochemical reagent card according to claim 1, characterized in that, It further includes a flow channel switching component for disconnecting or connecting the sample flow channel.

8. A blood gas biochemical reagent card according to claim 7, characterized in that, The sample flow channel includes a first section flow channel and a second section flow channel that are disconnected in a staggered manner; The flow channel switching component is disposed at the staggered disconnection position of the first section flow channel and the second section flow channel. The flow channel switching component includes a second sleeve embedded in the reagent card body and a sliding member for moving inside the second sleeve, and the sliding member is used for connecting the staggered disconnection position of the sample flow channel.

9. A blood gas biochemical reagent card according to claim 8, characterized in that, The liquid outlet end of the first section flow channel is provided with a first small hole, and the liquid inlet end of the second section flow channel is provided with a second small hole. Both the first small hole and the second small hole are communicated with the second sleeve; The surface of the sliding member is provided with a conduction groove for communicating the first small hole and the second small hole.

10. A blood gas and biochemical analyzer, characterized in that, Including the blood gas and biochemical reagent card according to any one of claims 1 to 9.

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