Test card assembly and blood gas analyzer

Abstract

The present application relates to a kind of blood gas analyzers, including test card assembly and reagent pack assembly, test card assembly at least includes the test card main body with calibration liquid port, reagent pack assembly at least includes rotating switch assembly, liquid storage device, air inlet device and sample inlet device with liquid inlet needle, rotating switch assembly includes the fixed valve body with first pipe mouth with liquid storage device communication, second pipe mouth with sample inlet device communication, third pipe mouth with air inlet device communication, and rotating main body with communication pipeline is set, both ends of liquid inlet needle are respectively communicated with second pipe mouth and calibration liquid port, rotating main body is set in fixed valve body inside and can be rotated relative to fixed valve body to realize first pipe mouth and second pipe mouth communication, or second pipe mouth and third pipe mouth communication, or close second pipe mouth.This blood gas analyzer uses rotating switch assembly to realize the on-off control of different pipeline, without pressing and relaxing rubber tube action, there is no pipeline blockage hidden trouble, prevent calibration liquid from leaking.

Description

[0001] This application is a divisional application of the Chinese patent application No.CN201610207561.8, filed on March 31, 2016. TECHNICAL FIELD

[0002] The present application relates to the medical technology field, in particular to a blood gas analyzer. BACKGROUND

[0003] The blood gas analyzer is a commonly used medical device, and the blood gas analyzer has a reagent package. The reagent package stores a calibration liquid, which is used for calibrating a to-be-tested electrode. In order to ensure the stability of the calibration liquid, the calibration liquid must be well sealed. The reagent package on the market is mainly composed of a shell, a rubber tube, a rubber tube valve and the like. The rubber tube valve can be inserted around the assembly position of the shell, so that the hook portion is clamped into the clamping hole. The shell and the rubber tube valve press the rubber tube tightly to achieve the shut-off of the rubber tube. When the hook portion is separated from the clamping hole, the shell and the rubber tube valve loosen the pressure on the rubber tube, and the rubber tube relies on its own elasticity to lift the rubber tube valve to achieve the opening of the rubber tube. Although this can achieve the on-off control of the rubber tube, it has the following disadvantages: the reagent package needs to press the rubber tube tightly by the rubber tube valve for a long time to prevent the calibration liquid from leaking during transportation and storage. The long-term pressure state makes the rubber tube easily stick together and unable to rebound, causing pipeline blockage. The action of the valve to press the rubber tube is unreliable, and there is a risk of liquid leakage due to incomplete pressure on the pipeline cross section. SUMMARY

[0004] The purpose of the present application is to provide a blood gas analyzer which can avoid the occurrence of pipeline blockage and liquid leakage.

[0005] In order to achieve the purpose of the present application, the technical scheme adopted is as follows:

[0006] A blood gas analyzer comprises a test card assembly and a reagent package assembly. The test card assembly at least comprises a test card main body provided with a calibration liquid port. The reagent package assembly at least comprises a rotary switch assembly, a liquid storage device, an air inlet device and a sample inlet device provided with a liquid inlet needle. The rotary switch assembly comprises a fixed valve body provided with a first pipe port communicated with the liquid storage device, a second pipe port communicated with the sample inlet device and a third pipe port communicated with the air inlet device, and a rotary main body provided with a communication pipeline. The two ends of the liquid inlet needle are respectively communicated with the second pipe port and the calibration liquid port. The rotary main body is arranged in the fixed valve body and can rotate relative to the fixed valve body to realize the communication between the first pipe port and the second pipe port, or the communication between the second pipe port and the third pipe port, or the closing of the second pipe port.

[0007] When the rotary switch assembly is in the state of the first nozzle and the second nozzle being communicated, the liquid storage device is communicated with the sample inlet device, and the extraction of the calibration liquid can be performed; when the rotary switch assembly is in the state of the second nozzle and the third nozzle being communicated, the sample inlet device is communicated with the air inlet device, and the extraction of the air can be performed; when the rotary switch assembly is in the state of the second nozzle being closed, the second nozzle is closed, that is, the sample inlet device is closed, so that the test card performs the extraction of the test liquid. The blood gas analyzer utilizes the rotary switch assembly to realize the on-off control of different pipes, does not need to press and release the rubber tube, and does not exist the hidden trouble of pipe blockage. Meanwhile, when the rotary switch assembly is in the third state, the first nozzle is effectively closed, and the leakage of the calibration liquid is prevented.

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

[0009] Further, the test card body is further provided with a liquid pipe, a sample inlet and an electrode circuit board. The liquid pipe includes a test liquid pipe, a calibration liquid pipe and an electrode pipe connected with the electrode circuit board. One end of the test liquid pipe is communicated with the sample inlet, and the other end is communicated with the calibration liquid pipe and the electrode pipe. The end of the calibration liquid pipe away from the test liquid pipe is communicated with the calibration liquid inlet, and the highest liquid level of the calibration liquid pipe is higher than the liquid surface of the test liquid. After the test is completed, the calibration liquid inlet is separated from the reagent package assembly, and the test liquid is stored in the electrode pipe and the calibration liquid pipe. Since the highest liquid level of the calibration liquid pipe is higher than the liquid surface of the test liquid, the test liquid cannot flow through the highest liquid level of the calibration liquid pipe without external force, and the liquid cannot leak from the calibration liquid inlet, so that the liquid pollution is prevented. Compared with the traditional blood gas analyzer, the calibration liquid inlet of the present application does not need to be provided with a sealing plug, and the reagent package assembly is directly communicated with the calibration liquid inlet, so that the problem of the debris caused by piercing the sealing plug is eliminated, and the hidden danger of test scrap caused by the debris pollution of the electrode is eliminated.

[0010] Further, the highest liquid level of the calibration liquid pipe is concavely provided with an upward-opening leakage prevention groove. There is a cross-section difference between the leakage prevention groove and the calibration liquid pipe, and the test liquid cannot flow out of the leakage prevention groove due to the liquid tension of the test liquid, so that the liquid leakage from the calibration liquid inlet is further prevented.

[0011] Further, the test card body is also provided with a liquid pipeline, a sample inlet, a suction port and an electrode circuit board, the liquid pipeline comprises a test liquid pipeline, a waste liquid chamber and an electrode pipeline connected with the electrode circuit board, two ends of the test liquid pipeline are communicated with the sample inlet and the electrode pipeline respectively, an end of the electrode pipeline away from the test liquid pipeline is communicated with a liquid inlet of the waste liquid chamber, a liquid outlet of the waste liquid chamber is communicated with the suction port, and the liquid outlet is located above the liquid inlet. After the test is completed, the suction port is separated from the external device, and the calibration liquid is stored in the waste liquid chamber. Since the liquid outlet of the waste liquid chamber is located above the liquid inlet, the calibration liquid cannot flow out of the liquid outlet without external force, so the suction port communicated with the liquid outlet cannot leak liquid, preventing liquid pollution. Compared with the traditional blood gas analyzer, the suction port of the present application does not need to be provided with a sealing plug, and the external device is directly communicated with the suction port, so there is no problem of debris caused by piercing the sealing plug, eliminating the hidden danger of test scrap caused by debris pollution of the electrode.

[0012] Further, the waste liquid chamber comprises at least a first waste liquid chamber and a second waste liquid chamber arranged side by side, a liquid discharge port communicated with the first waste liquid chamber and the second waste liquid chamber, a liquid inlet is arranged at the bottom of the first waste liquid chamber, a liquid outlet is arranged at the top of the second waste liquid chamber, and the liquid discharge port is located on the side close to the liquid outlet. After the test is completed, the calibration liquid is stored in the first waste liquid chamber, the liquid discharge port is arranged between the first waste liquid chamber and the second waste liquid chamber, and the liquid discharge port is located on the side close to the liquid outlet and communicated with the top of the first waste liquid chamber and the second waste liquid chamber. There is a cross-section difference between the liquid discharge port and the waste liquid chamber, and the calibration liquid cannot flow from the first waste liquid chamber into the second waste liquid chamber due to its own liquid tension, further preventing liquid from leaking out of the suction port.

[0013] Further, the first waste liquid chamber and the second waste liquid chamber are both provided with support columns. By arranging the support columns, it is prevented that the sealing membrane on the test card sinks into the waste liquid chamber when the test card is suctioned through the suction port.

[0014] Further, the blood gas analyzer further comprises a test valve assembly provided with a pressing member, the test card body is also provided with a liquid pipeline, the test card assembly further comprises a sealing membrane for closing the liquid pipeline, the sealing membrane is an elastic composite membrane, opposite surfaces of the liquid pipeline and the sealing membrane are provided with a valve groove, the sealing membrane is located between the valve groove and the pressing member, and the pressing member is provided with a pressure head matched with the shape of the valve groove. When the pressing member extrudes the sealing membrane to adhere to one side of the valve groove, the test liquid pipeline is closed. The sealing membrane is an elastic composite membrane, and when the extruding member leaves the sealing membrane, the sealing membrane deforms by its own elasticity to leave the valve groove, and the test liquid pipeline is opened. The valve groove is arranged in the test liquid pipeline and constitutes an integral whole with the test liquid pipeline, so there is no extra cavity, no bubbles are left, the amount of test liquid is reduced, and the test accuracy is improved. The test card body does not need to be provided with an on-off switch rubber plug and a sealing membrane for covering the on-off switch rubber plug, so the air leakage problem is avoided, the number of parts is reduced, production is facilitated, and the product failure rate is reduced.

[0015] Further, the valve groove bottom is provided with a protrusion protruding to one side of the sealing film. When the sealing film is filled into the valve groove, the protrusion is embedded into the sealing film, so that the sealing effect of the test liquid pipeline is better.

[0016] Further, the test valve assembly further comprises a first driving device for driving the pressing member to reciprocate to one side of the valve groove.

[0017] Further, the fixed valve body is in interference fit with the rotating body. The pipeline is closed by the wall surface of the rotating body, and the structure design is ingenious.

[0018] Further, the blood gas analyzer further comprises a reagent pack valve control assembly, which further comprises a rotating cover sleeved on the rotating body and a second driving device for driving the rotating cover to rotate. The second driving device drives the rotating cover and the rotating body to rotate, and the on-off control of different pipelines is realized by using the rotating switch assembly.

[0019] Further, the test card body is further provided with a sample inlet, an air suction port, an electrode circuit board and a liquid pipeline. The liquid pipeline comprises a test liquid pipeline, a calibration liquid pipeline, a waste liquid chamber and an electrode pipeline connected with the electrode circuit board. One end of the test liquid pipeline is in communication with the sample inlet, and the other end is in communication with the calibration liquid pipeline and the electrode pipeline. The end of the calibration liquid pipeline away from the test liquid pipeline is in communication with the calibration liquid port. The highest liquid level of the calibration liquid pipeline is higher than the liquid surface of the test liquid. The end of the electrode pipeline away from the test liquid pipeline is in communication with the liquid inlet of the waste liquid chamber. The liquid outlet of the waste liquid chamber is in communication with the air suction port, and the liquid outlet is located above the liquid inlet. The test liquid cannot flow through the highest liquid level of the calibration liquid pipeline without external force, the calibration liquid cannot flow out of the liquid outlet of the waste liquid chamber, the liquid cannot flow out of the calibration liquid port and the air suction port in communication with the liquid outlet, and the liquid pollution is prevented.

[0020] Further, the blood gas analyzer further comprises a test valve assembly provided with a pressing member. The test card body is further provided with a sample inlet, an electrode circuit board and a liquid pipeline. The test card assembly further comprises a sealing film for sealing the liquid pipeline. The liquid pipeline and the opposite surface of the sealing film are provided with a valve groove. The sealing film is located between the valve groove and the pressing member. The pressing member is provided with a pressure head matched with the shape of the valve groove. The liquid pipeline comprises a test liquid pipeline, a calibration liquid pipeline and an electrode pipeline connected with the electrode circuit board. One end of the test liquid pipeline is in communication with the sample inlet, and the other end is in communication with the calibration liquid pipeline and the electrode pipeline. The end of the calibration liquid pipeline away from the test liquid pipeline is in communication with the calibration liquid port. The highest liquid level of the calibration liquid pipeline is higher than the liquid surface of the test liquid. The liquid flow out of the calibration liquid port is prevented, the air leakage problem is avoided, and the accuracy of the blood gas analyzer test is improved.

[0021] Further, the blood gas analyzer further comprises a test valve assembly provided with a pressing member, the test card body is further provided with a sample inlet, a suction port, an electrode circuit board and a liquid pipeline, the test card assembly further comprises a sealing film for sealing the liquid pipeline, opposite surfaces of the liquid pipeline and the sealing film are provided with a valve groove, the sealing film is located between the valve groove and the pressing member, and the pressing member is provided with a pressure head matched with the shape of the valve groove; the liquid pipeline comprises a test liquid pipeline, a waste liquid chamber and an electrode pipeline connected with the electrode circuit board, two ends of the test liquid pipeline are respectively connected with the sample inlet and the electrode pipeline, an end of the electrode pipeline away from the test liquid pipeline is connected with a liquid inlet of the waste liquid chamber, a liquid outlet of the waste liquid chamber is connected with the suction port, and the liquid outlet is located above the liquid inlet. The liquid is prevented from flowing out of the suction port, the air leakage problem is avoided, and the testing accuracy of the blood gas analyzer is improved.

[0022] Further, the liquid pipeline comprises a calibration liquid pipeline, an end of the test liquid pipeline connected with the electrode pipeline is further connected with the calibration liquid pipeline and the electrode pipeline, an end of the calibration liquid pipeline away from the test liquid pipeline is connected with a calibration liquid inlet, and a highest liquid level of the calibration liquid pipeline is higher than a liquid surface of the test liquid. The liquid is prevented from flowing out of the suction port and the calibration liquid inlet, the air leakage problem is avoided, and the testing accuracy of the blood gas analyzer is improved.

[0023] Further, the blood gas analyzer further comprises a piston pump assembly, the test card body is further provided with a suction port, the piston pump assembly comprises a suction needle connected with the suction port at one end, a connecting head connected with the suction needle, a piston connected with the connecting head, and a third driving device for driving the piston to perform linear reciprocating motion. During the testing process, the piston is driven to retreat by the third driving device, a negative pressure is generated in the liquid pipeline in the test card body, and the calibration liquid, air or test liquid is drawn into the liquid pipeline, so that the extraction of various media is completed.

[0024] Further, the blood gas analyzer further comprises a sealing member, the sealing member is sleeved on the liquid inlet needle and the suction needle, and an outer wall of the test card body is provided with a sealing groove matched with the shape of the sealing member. The sealing effect of the blood gas analyzer on the liquid leakage is better, compared with a conventional blood gas analyzer, the sealing member is respectively sealed on the liquid inlet needle and the suction needle, the reagent bag assembly and the piston pump assembly are separated from the test card body, under the premise of ensuring the sealing, the hidden danger of test scrapping caused by the electrode pollution by the debris is avoided and eliminated.

[0025] Further, the blood gas analyzer further comprises a sliding buckle assembly, the sliding buckle assembly is oppositely arranged with the test card body and located on a side of the test card body facing the electrode circuit board, the sliding buckle assembly comprises a sliding block, a first fixed seat, a first compression spring abutting the sliding block and the fixed seat at two ends, the sliding block is provided with a first plug protruding to one side of the test card body, and the test card body is provided with a first limiting groove matched with the first plug. After the test card assembly is inserted into the reagent bag assembly, the first plug on the sliding block is inserted into the first limiting groove under the action of the first compression spring, so that the positioning of the test card body is realized.

[0026] Further, the blood gas analyzer further comprises a heating assembly, the test card body is further provided with an electrode circuit board, the heating assembly is arranged opposite to the test card body and located at a side of the test card body away from the electrode circuit board, the heating assembly comprises a first heating body arranged opposite to the electrode circuit board, a heating body fixing support fixed with the first heating body, a fourth driving device driving the heating body fixing support to reciprocate towards the side of the electrode circuit board, the heating body fixing support is provided with a second plug protruding towards the side of the test card body, and the test card body is provided with a second limiting groove matched with the second plug. After the test card assembly is inserted into the reagent package assembly, the first plug on the sliding block is inserted into the first limiting groove under the action of the first compression spring, thereby realizing the primary positioning of the test card body; the second plug moves towards the side of the test card body under the action of the fourth driving device and is inserted into the second limiting groove, thereby realizing the secondary positioning of the test card body, so that the positioning of the test card body is more accurate and reliable, and the liquid in the test card body is heated by the first heating body, so that the liquid reaches a specified temperature. The sliding buckle assembly and the heating assembly position the front surface and the back surface of the test card body from both sides, so that the test card body is uniformly stressed and is not deformed by stress.

[0027] Further, the blood gas analyzer further comprises a pop-up assembly located directly below the test card body, the pop-up assembly comprises a second fixing seat, a pressing block arranged opposite to the bottom of the test card body, and a second compression spring abutting the second fixing seat and the pressing block at two ends. After the test card assembly is inserted into the reagent package assembly, the sliding buckle assembly and the heating assembly fix and position the test card body, the pressing piece is pressed under stress, and the second compression spring is compressed under stress; after the test is completed, the sliding buckle assembly and the heating assembly release the fixation of the test card body, the pressing block rebounds upwards under the action of the second compression spring, thereby realizing the automatic pop-up of the test card body.

[0028] Further, the blood gas analyzer further comprises a test assembly, the test assembly is arranged opposite to the test card body and located at the side of the test card body facing the electrode circuit board, the test assembly comprises a detection module, a second heating body arranged opposite to the electrode circuit board, a shell fixed with the detection module and the second heating body, a fifth driving device driving the shell to reciprocate towards the side of the electrode circuit board, a sliding block located above the shell, a cooperation rib protruding from the bottom of the sliding block to one side of the shell, a pushing rib protruding from the top of the shell to one side of the sliding block, and the pushing rib is located between the cooperation rib and the test card body. After the test card assembly is inserted into the reagent pack assembly, the fifth driving device drives the second heating body on the shell to move towards the side of the electrode circuit board, the first plug is inserted into the first limiting groove, and the second plug is inserted into the second limiting groove; after the test assembly is powered on, the electrode circuit board is heated, the liquid in the test card body reaches a specified temperature, and the current and voltage signals generated on the electrode circuit board are transmitted to the host through the detection module, so as to realize the test of the calibration liquid and the test liquid; after the test is completed, the fifth driving device of the test assembly drives the shell to retreat, and since the pushing rib is located between the cooperation rib and the test card body, when the pushing rib on the shell contacts the cooperation rib, the pushing rib continues to retreat with the shell, the sliding block retreats with the pushing rib, the first compression spring is compressed, and the first plug on the sliding block is separated from the first limiting groove. After the test card body is automatically ejected, the fifth driving device moves the shell forward, the sliding block also moves forward under the action of the first compression spring, the cooperation rib extrudes the pushing rib, and when the shell moves to the position where the pushing rib and the cooperation rib are not stressed, the first plug of the sliding block assembly returns to the initial position, so that the next round of test is facilitated. The structure of the cooperation rib and the pushing rib is designed ingeniously, the position control of the test assembly on the sliding buckle assembly is realized, and the action is more reliable.

[0029] Further, the blood gas analyzer further comprises a reagent pack valve control assembly, a piston pump assembly, a heating assembly and a testing assembly, the testing valve assembly further comprises a first driving device for driving the pressing member to reciprocate to one side of the valve groove, the reagent pack valve control assembly further comprises a rotating cover sleeved on the rotating main body and a second driving device for driving the rotating cover to rotate, the piston pump assembly comprises a suction needle communicated with the suction port, a connecting head communicated with the suction needle, a piston connected with the connecting head and a third driving device for driving the piston to linearly reciprocate, the heating assembly comprises a first heating body oppositely arranged with the electrode circuit board, a heating body fixing support fixed with the first heating body and a fourth driving device for driving the heating body fixing support to reciprocate to one side of the electrode circuit board, and the testing assembly comprises a detection module, a second heating body oppositely arranged with the electrode circuit board, a shell fixed with the detection module and the second heating body and a fifth driving device for driving the shell to reciprocate to one side of the electrode circuit board. The testing valve assembly, the reagent pack valve control assembly, the piston pump assembly, the heating assembly and the testing assembly are all provided with independent driving devices for control, and compared with the traditional disc synchronous driving system of the blood gas analyzer, the blood gas analyzer is more flexible in control and the working cycle is shortened.

[0030] Further, the first driving device, the third driving device, the fourth driving device and the fifth driving device are linear stepping motors, and the second driving device is a rotary stepping motor. The first driving device, the second driving device, the third driving device, the fourth driving device and the fifth driving device are all stepping motors, and compared with the traditional disc synchronous driving system of the blood gas analyzer, the stepping motors are adjustable in speed, controllable in action, low in noise, simple in structure and high in assembly efficiency.

[0031] Further, the first driving device, the second driving device, the third driving device, the fourth driving device and the fifth driving device are all provided with reset optocouplers. The reset optocouplers detect the initial position of the motor shaft, eliminate the position error after each movement and make the control more accurate.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] When the rotating switch assembly is in the state that the first pipe opening and the second pipe opening are communicated, the liquid storage device is communicated with the sample inlet device, and the calibration liquid can be extracted; when the rotating switch assembly is in the state that the second pipe opening and the third pipe opening are communicated, the sample inlet device is communicated with the air inlet device, and the air can be extracted; when the rotating switch assembly is in the state that the second pipe opening is closed, the second pipe opening is closed, that is, the sample inlet device is closed, so that the testing card can extract the test liquid. The blood gas analyzer realizes the on-off control of different pipelines by the rotating switch assembly, does not need to press and loosen the rubber tube, does not have the pipeline blockage hidden danger, and when the rotating switch assembly is in the third state, the first pipe opening is effectively closed, so that the calibration liquid is prevented from leaking. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic diagram of the blood gas analyzer of the embodiment of the present application;

[0035] Figure 2 is an exploded schematic diagram of the blood gas analyzer of the embodiment of the present application;

[0036] Figure 3 is a connection schematic diagram of the test card assembly and the reagent pack assembly of the embodiment of the present application;

[0037] Figure 4 is a structural schematic diagram of the reagent pack assembly of the embodiment of the present application;

[0038] Figure 5 is an exploded schematic diagram of the reagent pack assembly of the embodiment of the present application;

[0039] Figure 6 is a connection schematic diagram of the reagent pack assembly and the reagent pack valve control assembly of the embodiment of the present application;

[0040] Figure 7 is a structural schematic diagram of the piston pump assembly of the embodiment of the present application;

[0041] Figure 8 is a structural schematic diagram of the test card assembly of the embodiment of the present application;

[0042] Figure 9 is an exploded schematic diagram of the test card assembly of the embodiment of the present application;

[0043] Figure 10 is Figure 8 a cross-sectional view along A-A of

[0044] Figure 11 is an enlarged view of I of Figure 10

[0045] Figure 12 is a structural schematic diagram of the test valve assembly of the embodiment of the present application;

[0046] Figure 13 is a first working state schematic diagram of the test card assembly of the embodiment of the present application;

[0047] Figure 14 is a second working state schematic diagram of the test card assembly of the embodiment of the present application;

[0048] Figure 15 is a third working state schematic diagram of the test card assembly of the embodiment of the present application;

[0049] Figure 16 is an enlarged view of II of Figure 1

[0050] ​​Figure 17 for Figure 1 Enlarged view of section III;

[0051] Figure 18 This is a schematic diagram showing the connection of the test card assembly, heating assembly, and test assembly according to an embodiment of the present invention;

[0052] Figure 19 for Figure 18 Enlarged view of point IV;

[0053] Figure 20 This is a schematic diagram of the structure of the heating assembly according to an embodiment of the present invention;

[0054] Figure 21 This is a schematic diagram of the structure of the test component in an embodiment of the present invention;

[0055] Figure 22 for Figure 4 Enlarged image of V.

[0056] Explanation of reference numerals in the attached figures:

[0057] 10. Test card assembly, 110. Test card body, 111. Sample inlet, 112. Standard solution inlet, 113. Air suction inlet, 114. Sealing groove, 115. Electrode test groove, 116. First limiting groove, 117. Second limiting groove, 120. Sealing film, 121. Adhesive film, 122. Elastic silicone film, 123. PET film, 130. Electrode circuit board, 140. Liquid channel, 141. Test liquid channel, 1411. Valve groove, 142. Standard solution channel, 1421. Leakage prevention groove, 1422. Top, 143. Waste liquid chamber, 1431. First waste liquid chamber, 1432. Second waste liquid chamber, 1433. Waste liquid outlet, 1434. Liquid inlet, 1435. Liquid outlet, 144. Electrode channel, 145. Waste liquid channel, 150. Sealing member, 160. Support column, 170. Sample injection needle, 180. Syringe, 190. Protrusion, 20. Reagent pack assembly, 210. Rotary switch assembly, 211. Fixed valve body, 212. Rotary body, 213. Connection channel, 214. First tube opening, 215. Second tube opening, 216. Third tube opening, 220. Liquid storage device, 221. Liquid outlet tube, 230. Air inlet device, 240. Sample injection device, 241. Liquid injection needle, 242. Liquid inlet tube, 250. Housing, 251. Front housing, 252. Rear housing, 260. Rotary handle, 270. Support seat, 30. Reagent pack valve control assembly, 310. Rotary cover, 320. Second driving device, 321. First motor shaft, 330. First optocoupler, 40. Piston pump assembly, 410. Air suction needle, 420. Air suction tube, 430. Connection head, 440. Piston, 450. Third driving device, 451. Second motor shaft, 460. Second optocoupler, 470. First fixed support, 480. Pump body, 50. Test valve assembly, 510. Pressure-resisting member, 511. Pressure head, 520. First driving device, 521. Third motor shaft, 530. Third optocoupler, 60. Slide buckle assembly, 610. Slide block, 611. First plug, 612. Matching rib, 620. First fixed seat, 630. First compression spring, 640. First guide shaft, 70. Heating assembly, 710. First heating body, 720. Heating body fixed support, 721. Second plug, 730. Fourth driving device, 731. Fourth motor shaft, 740. Fourth optocoupler, 750. Heating body fixing cover, 760. Motor fixed support, 770. Second guide shaft, 780. Buckling position, 80. Ejection assembly, 810. Second fixed seat, 820. Pressure-resisting block, 830. Second compression spring, 90. Test assembly, 910. Detection module, 911. Test probe, 920. Second heating body, 930. Housing, 931. Pushing rib, 940. Fifth driving device, 941. Fifth motor shaft, 950. Fifth optocoupler. DETAILED DESCRIPTION

[0058] Embodiments of the present application will be described in detail below with reference to the drawings.

[0059] As Figures 1 to 4 , Figure 9 , Figure 22 illustrated, a blood gas analyzer comprises a test card assembly 10 and a reagent pack assembly 20, the test card assembly 10 comprises a test card main body 110 provided with a sample inlet 111, a calibration liquid inlet 112, a gas suction inlet 113 and a liquid conduit 140, a sealing film 120 sealing the liquid conduit 140, an electrode circuit board 130 provided on the test card main body 110, the reagent pack assembly 20 at least comprises a rotary switch assembly 210, a liquid storage device 220, an air inlet device 230 and a sample inlet device 240 provided with a liquid inlet needle 241, the rotary switch assembly 210 comprises a fixed valve body 211 and a rotary main body 212, the rotary main body 212 is arranged inside the fixed valve body 211 and can rotate relative to the fixed valve body 211, the rotary main body 212 is provided with a connecting conduit 213, the fixed valve body 211 is provided with a first pipe opening 214 in communication with the liquid storage device 220, a second pipe opening 215 in communication with the sample inlet device 240 and a third pipe opening 216 in communication with the air inlet device 230, two ends of the liquid inlet needle 241 are respectively in communication with the second pipe opening 215 and the calibration liquid inlet 112; rotating the rotary main body 212 can make the rotary switch assembly 210 be in a first state, a second state or a third state: the first state is that the second pipe opening 215 and the first pipe opening 214 are in communication through the connecting conduit 213; the second state is that the second pipe opening 215 and the third pipe opening 216 are in communication through the connecting conduit 213; the third state is that the second pipe opening 215 is closed.

[0060] When the rotary switch assembly 210 is in the first state, the liquid storage device 220 is in communication with the sample inlet device 240, and the calibration liquid can be extracted; when the rotary switch assembly 210 is in the second state, the sample inlet device 240 is in communication with the air inlet device 230, and the air can be extracted; when the rotary switch assembly 210 is in the third state, the second pipe opening 215 is closed, that is, the sample inlet device 240 is closed, so that the test card performs the liquid extraction action. The blood gas analyzer uses the rotary switch assembly 210 to realize the on-off control of different conduits, without the action of pressing and relaxing the rubber tube, and there is no hidden trouble of conduit blockage, and at the same time, when the rotary switch assembly 210 is in the third state, the first pipe opening 214 is effectively closed, preventing the calibration liquid from leaking. Preferably, the fixed valve body 211 and the rotary main body 212 are interference fit, and the wall surface of the rotary main body 212 is directly used to realize the closure of the conduit.

[0061] In the embodiment, as Figure 4 , Figure 5 and Figure 22As shown in the drawings, the reagent pack assembly 20 further comprises a housing 250 with a placing cavity, the fixed valve body 211 is fixed in the placing cavity, the connecting pipe 213 is an L-shaped pipe, the housing 250 is provided with a rotating handle 260 connected with the rotating main body 212, and the rotating handle 260 is exposed on the housing 250. When in use, the rotating handle 260 is rotated to adjust the rotating switch assembly 210 to different states, which is convenient to use. The connecting pipe 213 can also be provided in other shapes according to actual needs.

[0062] As shown in the drawings, Figure 4 and Figure 5 The liquid storage device 220 is a calibration liquid bag arranged in the placing cavity, the housing 250 has a function of protecting the calibration liquid bag to prevent the calibration liquid bag from being contaminated, the calibration liquid bag is provided with a liquid outlet pipe 221, and the liquid outlet pipe 221 is sleeved on the first pipe opening 214. The housing 250 comprises a front shell 251 and a rear shell 252, and the front shell 251 and the rear shell 252 are detachably connected to facilitate installation of the calibration liquid bag.

[0063] In this embodiment, the front shell 251 and the rear shell are fixed by screws, and the housing 250 is provided with a state identifier (not shown in the drawings) near the rotating handle 260, so that the user can know the state of the rotating switch assembly 210.

[0064] As shown in the drawings, Figure 2 and Figure 6 The blood gas analyzer further comprises a reagent pack valve control assembly 30, the reagent pack valve control assembly 30 further comprises a rotating cover 310 sleeved on the rotating main body 212 and a second driving device 320 for driving the rotating cover 310 to rotate. The second driving device 320 drives the rotating cover 310 and the rotating main body 212 to rotate, and the rotating switch assembly 210 is used to control the on-off of different pipes.

[0065] In this embodiment, the second driving device 320 is a rotary stepper motor, the rotary stepper motor is provided with a first motor shaft 321, the rotating cover 310 is designed with a photoelectric coupling sensing wall (not shown in the drawings), and the rotating cover 310 is fixed to the first motor shaft 321 by screws. When the rotary stepper motor is powered on, the first motor shaft 321 drives the rotating cover 310 and the rotating main body 212 to rotate, thereby controlling the on-off of the sample inlet channel and the gas inlet channel of the reagent pack assembly 20.

[0066] The reagent pack valve control assembly 30 further comprises a first photoelectric coupling 330 for detecting and controlling the initial position of the first motor shaft 321 to eliminate the position error after each rotation.

[0067] As shown in the drawings, Figure 4 and Figure 22As shown, the reagent pack assembly 20 further comprises a support seat 270 fixed on the shell 250, the sample inlet device 240 comprises a sample inlet needle 241 and a sample inlet tube 242, the sample inlet needle 241 is fixed on the support seat 270 and connected with the calibration liquid port 112 of the test card, so as to facilitate the provision of samples, the sample inlet tube 242 is sleeved on the sample inlet needle 241 at one end and sleeved on the second tube port 215 at the other end, and the sample inlet needle 241 communicates with the second tube port 215 through the sample inlet tube 242. The air inlet device 230 is an air tube sleeved on the third tube port 216, and the air tube communicates with the atmosphere to directly extract air from the atmosphere.

[0068] As shown in Figure 3 , Figure 4 and Figure 7 , the blood gas analyzer further comprises a piston pump assembly 40, the piston pump assembly 40 comprises a gas extraction needle 410 connected with the gas extraction port 113 at one end, a gas extraction tube 420 connected with the other end of the gas extraction needle 410, a connecting head 430 connected with the other end of the gas extraction tube 420, a piston 440 connected with the connecting head 430, a third driving device 450 driving the piston 440 to move linearly, and the gas extraction needle 410 and the gas extraction tube 420 are fixed on the support seat 270 of the reagent pack assembly 20. During the test, the piston 440 is driven to retreat by the third driving device 450, so that the liquid pipeline 140 in the test card body 110 generates negative pressure, and the calibration liquid, air or test liquid is introduced into the liquid pipeline 140, and the extraction of each medium is completed.

[0069] In this embodiment, the third driving device 450 is a linear stepper motor, the linear stepper motor is provided with a second motor shaft 451, the piston pump assembly 40 further comprises a piston pump subassembly provided with the piston 440 and the connecting head 430, a second optocoupler 460 and a first fixed bracket 470, the piston pump subassembly further comprises a pump body 480, and the piston pump subassembly is sleeved in the first fixed bracket 470, wherein the piston 440 is threadedly connected with the second motor shaft 451, the third driving device 450 is fixed to the first fixed bracket 470 by screws and simultaneously fixes the piston pump subassembly. When the third driving device 450 is powered on, the second motor shaft 451 drives the piston 440 to move reciprocatingly along the pump body 480, and the second optocoupler 460 detects the initial position of the second motor shaft 451 to eliminate the position error after each reciprocating movement.

[0070] As shown in Figure 3As shown, the blood gas analyzer further comprises a sealing member 150 sleeved on the liquid inlet needle 241 and the air extraction needle 410, and the outer wall of the test card body 110 is provided with a sealing groove 114 matched with the sealing member 150. The sealing member 150 seals the liquid inlet needle 241 and the air extraction needle 410, respectively, so that the effect of preventing liquid leakage of the blood gas analyzer is better. Compared with the conventional blood gas analyzer, after the reagent pack assembly 20 and the piston pump assembly 40 are separated from the test card body 110, the sealing is ensured, and the hidden danger of test rejection caused by the pollution of the electrode by the debris is avoided.

[0071] As shown in Figure 8 and Figure 9 As shown, the liquid pipeline 140 of the test card assembly 10 comprises a test liquid pipeline 141, a calibration liquid pipeline 142, a waste liquid chamber 143, and an electrode pipeline 144 connected with the electrode circuit board 130. One end of the test liquid pipeline 141 is in communication with the sample inlet 111, and the other end is in communication with the calibration liquid pipeline 142 and the electrode pipeline 140. The end of the calibration liquid pipeline 142 away from the test liquid pipeline 141 is in communication with the calibration liquid port 112. The end of the electrode pipeline 140 away from the test liquid pipeline 141 is in communication with the liquid inlet 1434 of the waste liquid chamber 143. The liquid outlet 1435 of the waste liquid chamber 143 is in communication with the air extraction port 113. The liquid outlet 1435 is located above the liquid inlet 1434. The highest liquid level of the calibration liquid pipeline 142 is higher than the liquid surface of the test liquid. After the test is completed, the air extraction port 113 and the calibration liquid port 112 are separated from the reagent pack assembly 20. The calibration liquid is stored in the waste liquid chamber 143, and the test liquid is stored in the electrode pipeline 140 and the calibration liquid pipeline 142. Since the liquid outlet 1435 of the waste liquid chamber 143 is located above the liquid inlet 1434, the calibration liquid cannot flow out of the liquid outlet 1435 without external force. Therefore, the air extraction port 113 in communication with the liquid outlet 1435 will not leak liquid, preventing liquid pollution. Moreover, the highest liquid level of the calibration liquid pipeline 142, i.e., the top 1422 of the pipeline, is higher than the liquid surface of the test liquid. Without external force, the test liquid cannot flow through the highest liquid level of the calibration liquid pipeline 142, and liquid will not leak from the calibration liquid port 112, preventing liquid pollution. Compared with the conventional test card, the sealing plug is not required on the calibration liquid port 112 and the air extraction port 113 of the present application. The external device is directly in communication with the calibration liquid port 112 and the air extraction port 113, and there is no problem of debris caused by piercing the sealing plug, eliminating the hidden danger of test rejection caused by the pollution of the electrode by the debris.

[0072] In the embodiment, the waste liquid cavity 143 comprises a first waste liquid cavity 1431 and a second waste liquid cavity 1432 arranged side by side, a liquid discharge port 1433 communicating the first waste liquid cavity 1431 and the second waste liquid cavity 1432, the bottom of the first waste liquid cavity 1431 is provided with a liquid inlet port 1434, the top of the second waste liquid cavity 1432 is provided with a liquid outlet port 1435, and the liquid discharge port 1433 is located on the side close to the liquid outlet port 1435. After the test is completed, the calibration liquid is stored in the first waste liquid cavity 1431, the liquid discharge port 1433 is arranged between the first waste liquid cavity 1431 and the second waste liquid cavity 1432, and the liquid discharge port 1433 is located on the side close to the liquid outlet port 1435 and communicates the top of the first waste liquid cavity 1431 and the second waste liquid cavity 1432. There is a cross-sectional difference between the liquid discharge port 1433 and the waste liquid cavity 143, and the calibration liquid cannot easily flow from the first waste liquid cavity 1431 into the second waste liquid cavity 1432 due to its own liquid tension, further preventing the liquid from leaking out of the air outlet 113. The waste liquid cavity 143 can also be provided with more than one according to actual needs.

[0073] As shown in Figure 8 , two support columns 160 are arranged in the first waste liquid cavity 1431 and the second waste liquid cavity 1432. By arranging the support columns 160, the sealing membrane 120 on the test card is prevented from sinking into the waste liquid cavity 143 when the test card is subjected to air suction through the air outlet 113. The first waste liquid cavity 1431 and the second waste liquid cavity 1432 can also be provided with more than one support column 160 according to actual needs.

[0074] As shown in Figure 8 , the liquid pipeline 140 further comprises a waste liquid pipeline 145, and the waste liquid pipeline 145 is connected between the liquid outlet port 1435 and the air outlet 113.

[0075] As shown in Figure 8 , the top 1422 of the calibration liquid pipeline 142 is concavely provided with a leakage prevention groove 1421 facing upward. There is a cross-sectional difference between the leakage prevention groove 1421 and the calibration liquid pipeline 142, and the test liquid cannot flow out of the leakage prevention groove 1421 due to its own liquid tension, further preventing the liquid from leaking out of the calibration liquid port 112. The leakage prevention groove 1421 can also be arranged between the top 1422 of the calibration liquid pipeline 142 and the end of the calibration liquid pipeline 142 connected with the test liquid pipeline 141 according to actual needs.

[0076] As shown in Figure 10 , the test card main body 110 is further provided with an electrode test groove 115, and the bottom of the electrode pipeline 140 is connected with the electrode circuit board 130 through the electrode test groove 115.

[0077] As shown in Figure 8As shown, the test card assembly 10 further comprises a sample injection needle 170, and a liquid injection needle 241 fixed to the sample injection port 111 of the test card body 110 and in communication with a syringe 180 in which the test liquid is stored.

[0078] As shown in Figure 2 , Figure 8 , Figure 9 and Figure 12 , the blood gas analyzer further comprises a test valve assembly 50 provided with a pressing member 510, the sealing membrane 120 is an elastic composite membrane, the test liquid pipeline 141 is provided with a valve groove 1411 on the opposite side of the sealing membrane 120, the sealing membrane 120 is located between the valve groove 1411 and the pressing member 510, and the pressing member 510 is provided with a pressure head 511 matched with the shape of the valve groove 1411. When the pressing member 510 extrudes the sealing membrane 120 to adhere to the side of the valve groove 1411, the test liquid pipeline 141 is closed; the sealing membrane 120 is an elastic composite membrane, and when the extruding member leaves the sealing membrane 120, the sealing membrane 120 deforms by its own elasticity to leave the valve groove 1411, and the test liquid pipeline 141 is opened. The valve groove 1411 is arranged in the test liquid pipeline 141 and forms an integral part with the test liquid pipeline 141, so that there is no excess cavity and no bubbles are left, and the amount of test liquid is reduced, improving the test accuracy; the test card body 110 does not need to be provided with an on-off switch rubber plug and a sealing membrane 120 for covering the channel switch rubber plug, avoiding air leakage, reducing the number of parts, facilitating production, and reducing product failure rate.

[0079] In this embodiment, as shown in Figure 12 , the test valve assembly 50 further comprises a first driving device 520 for driving the pressing member 510 to reciprocate to the side of the valve groove 1411, and a third optical coupler 530. The first driving device 520 is a linear stepper motor provided with a third motor shaft 521, and the pressing member 510 is fixed to the third motor shaft 521 by screwing. When the first driving device 520 is powered on, the third motor shaft 521 drives the pressing member 510 to reciprocate along the axial direction of the linear stepper motor. The third optical coupler 530 detects and controls the initial position of the third motor shaft 521, eliminating the position error of each reciprocation.

[0080] As shown in Figure 11 , the bottom of the valve groove 1411 is provided with a protruding part 190 protruding to the side of the sealing membrane 120, and the protruding part 190 is in the shape of a strip. When the sealing membrane 120 is filled into the valve groove 1411, the protruding part 190 is embedded in the sealing membrane 120, so that the sealing effect of the test liquid pipeline 141 is better.

[0081] In this embodiment, as shown in Figure 11As shown, the sealing film 120 includes the adhesive film 121, the elastic silica gel film 122 and the PET film 123, the adhesive film 121 is bonded between the test card body 110 and the elastic silica gel film 122, and the PET film 123 covers one side of the elastic silica gel film 122 away from the valve groove 1411. The adhesive film 121 plays a role of bonding the sealing film 120 and the test card body 110, so as to seal the pipelines of the test card; the elastic silica gel film 122 plays a role of sealing, and fills into the valve groove 1411 by the elasticity of the elastic silica gel film 122 itself; the PET film 123 plays a role of supporting and resetting, so as to ensure that the sealing film 120 is effectively reset after the external force is eliminated while the sealing film 120 is deformed, and the sealing film 120 adopts the flat and large-area film pasting mode to seal the liquid pipeline 140 in the entire test card, so as to further avoid the air leakage problem. The sealing film 120 can also adopt other structural forms according to actual needs.

[0082] The test card assembly 10, the test valve assembly 50, the reagent pack assembly 20, the reagent pack valve control assembly 30 and the piston pump assembly 40 constitute the liquid pumping subsystem of the blood gas analyzer. Before testing, the test card assembly 10 is inserted into the reagent pack assembly 20, the calibration liquid port 112 of the test card body 110 is connected with the liquid inlet needle 241 on the support seat 270, the air extraction port 113 of the test card body 110 is connected with the air extraction needle 410 on the support seat 270 and is sealed by the sealing member 150, so as to make the pipeline of the reagent pack assembly 20 communicate with the pipeline of the test card assembly 10; the connecting head 430 of the piston pump assembly 40 is inserted into the air extraction tube 420 on the support seat 270, the air extraction tube 420 communicates with the air extraction needle 410, so as to make the pipeline of the piston pump assembly 40 communicate with the pipeline of the test card assembly 10; the pressing member 510 of the test valve assembly 50 is assembled at the position of the valve groove 1411 of the test liquid pipeline 141, so as to realize the on-off control of the test liquid pipeline 141.

[0083] During testing, the calibration liquid is first extracted: for example, Figure 2 , Figure 3 and Figure 13As shown in FIG. 1 1, the second driving device 320 of the reagent pack valve control assembly 30 is powered on, the first motor shaft 321 drives the rotary cover 310 and the rotary body 212 to rotate, so that the L-shaped pipeline in the rotary body 212 is in communication with the first pipe orifice 214 and the second pipe orifice 215 of the reagent pack assembly 20 respectively, and then is in communication with the calibration liquid pipeline 142 and the electrode test groove 115 of the test card assembly 10; the first driving device 520 of the test valve assembly 50 is powered on, the third motor shaft 521 drives the pressing piece 510 to push forward, so that the sealing film 120 is pressed tightly on the valve groove 141 1 of the test liquid pipeline 141, and the elastic silica gel film 122 of the sealing film 120 is filled on the valve groove 141 1, so that the test liquid pipeline 141 is closed; the third driving device 450 of the piston pump assembly 40 is powered on, the second motor shaft 451 drives the piston 440 to retreat, so that the negative pressure is generated in the liquid pipeline 140 of the test card assembly 10; under the action of the negative pressure, the calibration liquid in the liquid storage device 220 of the reagent pack assembly 20 flows into the electrode test groove 115 through the rotary body 212, the liquid inlet pipeline 242, the liquid inlet needle 241 and the calibration liquid pipeline 142 of the test card assembly 10, and the extraction action of the calibration liquid is completed.

[0084] Then, the air is extracted: as shown in FIG. 12, Figure 2 、 Figure 3 and Figure 14 , the second driving device 320 of the reagent pack valve control assembly 30 is powered on, the first motor shaft 321 drives the rotary cover 310 and the rotary body 212 of the reagent pack assembly 20 to rotate, so that the L-shaped pipeline in the rotary body 212 is in communication with the second pipe orifice 215 and the third pipe orifice 216 respectively, and then is in communication with the calibration liquid pipeline 142 and the electrode test groove 115 of the test card assembly 10; the first driving device 520 of the test valve assembly 50 still keeps the powered-on working state, the pressing piece 510 still presses the sealing film 120 tightly on the valve groove 141 1, so that the test liquid pipeline 141 keeps the closed state; the third driving device 450 of the piston pump assembly 40 is powered on, the second motor shaft 451 drives the piston 440 to continue to retreat, so that the negative pressure is generated in the liquid pipeline 140 of the test card assembly 10; under the action of the negative pressure, the external air of the reagent pack assembly 20 enters the electrode test groove 115 through the third pipe orifice 216, the rotary body 212, the second pipe orifice 215, the liquid inlet pipeline 242, the liquid inlet needle 241 and the calibration liquid pipeline 142 of the test card assembly 10, and the extraction action of the air is completed.

[0085] Finally, the test liquid is extracted again: as shown in FIG. 13, Figure 2 、 Figure 3 and Figure 15As shown in the figure, the second driving device 320 of the reagent pack valve control assembly 30 is powered to work, the first motor shaft 321 drives the rotary cover 310 and the rotary main body 212 of the reagent pack assembly 20 to rotate, so that the L-shaped pipe in the rotary main body 212 is separated from the first pipe opening 214 and the third pipe opening 216, i.e. the outer wall of the rotary main body 212 closes the liquid storage device 220 and the liquid inlet pipe 242, so that the reagent pack pipe system is closed; the first driving device 520 of the test valve assembly 50 is powered to work, so that the abutting piece 510 is separated from the valve groove 1411 of the test liquid pipe 141, the sealing film 120 of the test card assembly 10 is elastically reset by the PET film 123, so that the test liquid pipe 141 is opened; the third driving device 450 of the piston pump assembly 40 is powered to work, the second motor shaft 451 drives the piston 440 to continue to retreat, so that the liquid pipe 140 of the test card assembly 10 generates negative pressure; under the action of the negative pressure, the test liquid in the syringe 180 enters the electrode test groove 115 through the liquid inlet needle 241 and the test liquid pipe 141 of the test card assembly 10, and the extraction of the test liquid is completed.

[0086] As shown in the figure, Figure 1 , Figure 2 and Figure 16 , the blood gas analyzer further comprises a sliding buckle assembly 60, which is arranged opposite to the test card main body 110 and located on the side of the test card main body 110 facing the electrode circuit board 130. The sliding buckle assembly 60 comprises a sliding block 610, a first fixed seat 620, a first compression spring 630 abutting the sliding block 610 and the fixed seat at both ends, a first guide shaft 640 sleeved with the first compression spring 630, one end of the first guide shaft 640 being connected with the first fixed seat 620, and the other end penetrating through the guide hole of the sliding block 610. The sliding block 610 is provided with a first plug 611 protruding to the side of the test card main body 110, and the side wall of the test card main body 110 is recessed with a first limiting groove 116 matched with the first plug 611. After the test card assembly 10 is inserted into the reagent pack assembly 20, the sliding block 610 is driven by the first compression spring 630, so that the first plug 611 on the sliding block 610 is inserted into the first limiting groove 116, realizing the positioning of the test card main body 110, and the first guide shaft 640 plays a guiding role to prevent the sliding block 610 from deviating during movement.

[0087] As shown in the figure, Figure 2 , Figures 17 to 20As shown, the blood gas analyzer further comprises a heating assembly 70 arranged opposite to the test card body 110 and located at the side of the test card body 110 away from the electrode circuit board 130. The heating assembly 70 comprises a first heating body 710 arranged opposite to the electrode circuit board 130, a heating body fixing bracket 720 fixed with the first heating body 710, a fourth driving device 730 driving the heating body fixing bracket 720 to reciprocate towards the side of the electrode circuit board 130, and the heating body fixing bracket 720 is provided with a second plug 721 protruding towards the side of the test card body 110, and the side wall of the test card body 110 is recessed with a second limiting groove 117 matched with the second plug 721. After the test card assembly 10 is inserted into the reagent pack assembly 20, the first plug 611 on the sliding block 610 is inserted into the first limiting groove 116 under the action of the first compression spring 630, so as to realize the primary positioning of the test card body 110. The second plug 721 moves towards the side of the test card body 110 under the action of the fourth driving device 730, and the second plug 721 is inserted into the second limiting groove 117, so as to realize the secondary positioning of the test card body 110, so that the positioning of the test card body 110 is more accurate and reliable, and the liquid in the test card body 110 is heated by the first heating body 710 to reach the specified temperature. The slide buckle assembly 60 and the heating assembly 70 position the front and back of the test card body 110 from both sides, so that the test card body 110 is uniformly stressed and will not be deformed by stress.

[0088] In the embodiment, as shown in Figure 20 The fourth driving device 730 is a linear stepper motor, the heating assembly 70 further comprises a fourth optocoupler 740, a heating body fixing cover 750, a motor fixing bracket 760, a second guide shaft 770 arranged on the motor fixing bracket 760, and the heating body fixing bracket 720 and the heating body fixing cover 750 are provided with buckling positions 780 matched with each other. The fourth driving device 730 is fixed to the motor fixing bracket 760 by screws, the heating body fixing bracket 720 is sleeved on the second guide shaft 770 of the motor fixing bracket 760 and is threadedly connected with the fourth motor shaft 731, and the first heating body 710 is fixed to the heating body fixing bracket 720 by the heating body fixing cover 750. When the fourth driving device 730 is powered on, the fourth motor shaft 731 drives the first heating body 710 to move linearly and reciprocally along the direction of the second guide shaft 770. The fourth optocoupler 740 detects and controls the initial position of the fourth motor shaft 731, so as to eliminate the position error after each reciprocating motion.

[0089] As shown in Figure 1 and Figure 2As shown, the blood gas analyzer further comprises a pop-up assembly 80 located right below the test card body 110, the pop-up assembly 80 comprises a second fixing seat 810, a pressing block 820 arranged opposite to the bottom of the test card body 110, and a second compression spring 830 abutting against the second fixing seat 810 and the pressing block 820 at two ends respectively. After the test card assembly 10 is inserted into the reagent pack assembly 20, the slide buckle assembly 60 and the heating assembly 70 fix and position the test card body 110, the pressing piece 510 is pressed downward under force, and the second compression spring 830 is compressed under force; when the test is completed, after the slide buckle assembly 60 and the heating assembly 70 release the fixation of the test card body 110, the pressing block 820 rebounds upward under the action of the second compression spring 830, so as to realize the automatic pop-up of the test card body 110.

[0090] As Figure 2 , Figure 18 , Figure 19 and Figure 21As shown, the blood gas analyzer further comprises a test assembly 90 which is arranged opposite to the test card body 110 and on the side of the test card body 110 facing the electrode circuit board 130, the test assembly 90 comprises a detection module 910, a second heating body 920 arranged opposite to the electrode circuit board 130, a shell 930 in which the detection module 910 and the second heating body 920 are fixed, a fifth driving device 940 which drives the shell 930 to reciprocate towards the side of the electrode circuit board 130, the slider 610 is located above the shell 930, the bottom of the slider 610 protrudes a matching rib 612 towards one side of the shell 930, the top of the shell 930 protrudes a pushing rib 931 towards one side of the slider 610, and the pushing rib 931 is located between the matching rib 612 and the test card body 110. After the test card assembly 10 is inserted into the reagent pack assembly 20, the fifth driving device 940 drives the second heating body 920 on the shell 930 to move towards the side of the electrode circuit board 130, the first plug 611 is inserted into the first limiting groove 116, and the second plug 721 is inserted into the second limiting groove 117; after the test assembly 90 is powered on, the electrode circuit board 130 is heated, the liquid in the test card body 110 reaches a specified temperature, and the current and voltage signals generated on the electrode circuit board 130 are transmitted to the host computer through the detection module 910, so as to realize the test of the calibration liquid and the test liquid; after the test is completed, the fifth driving device 940 of the test assembly 90 drives the shell 930 to retreat, since the pushing rib 931 is located between the matching rib 612 and the test card body 110, when the pushing rib 931 on the shell 930 contacts the matching rib 612, the pushing rib 931 continues to retreat with the shell 930, the slider 610 retreats together with the pushing rib 931, the first compression spring 630 is compressed, and the first plug 611 on the slider 610 is separated from the first limiting groove 116. After the test card body 110 is automatically ejected, the fifth driving device 940 moves the shell 930 forward, the slider 610 also moves forward under the action of the first compression spring 630, the matching rib 612 presses the pushing rib 931, when the shell 930 moves to the position where the pushing rib 931 and the matching rib 612 are not stressed, the first plug 611 of the slide buckle assembly 60 returns to the initial position, so as to facilitate the next round of test, and the structure of the matching rib 612 and the pushing rib 931 is designed ingeniously, so as to realize the position control of the test assembly 90 on the slide buckle assembly 60, and the action is more reliable.

[0091] In the embodiment, as Figure 21As shown, the fifth driving device 940 is a linear stepper motor, the detection module 910 is a test PCBA assembly, the test PCBA assembly is provided with test probes 911, the linear stepper motor is provided with a fifth motor shaft 941, the shell 930 is fixed on the fifth motor shaft 941 by screws, and the test assembly 90 further comprises a fifth optocoupler 950. When the linear fifth driving device 940 is powered on and works, the fifth motor shaft 941 drives the shell 930 to reciprocate along the axial direction of the stepper motor, so as to realize the test function. The fifth optocoupler 950 plays a role of detecting and controlling the initial position of the fifth motor shaft 941, and eliminates the position error after each reciprocation.

[0092] The test card assembly 10, the heating assembly 70 and the test assembly 90 constitute a test and heating subsystem of the blood gas analyzer. The test card assembly 10 is inserted into the reagent pack assembly 20, the first heating body 710 of the heating assembly 70 is opposite the position of the electrode test groove 115 on the test card main body 110, and the second heating body 920 and the test probes 911 of the test assembly 90 correspond to the electrode circuit board 130 on the test card main body 110.

[0093] After the test card assembly 10 is inserted into position, the liquid pumping subsystem of the blood gas analyzer works to pump the calibration liquid or the test liquid into the electrode test groove 115. The fourth driving device 730 of the heating assembly 70 is powered on and works, the fourth motor shaft 731 drives the first heating body 710 to push forward and press tightly against the sealing film 120 of the test card assembly 10. The first heating body 710 is powered on and works to generate heat to heat the sealing film 120 and the electrode test groove 115 of the test card assembly 10, so that the liquid in the electrode test groove 115 is heated to a set temperature. The fifth driving device 940 of the test assembly 90 is powered on and works, the fifth motor shaft 941 drives the entire shell 930 to push forward and press tightly against the electrode circuit board 130 on the test card assembly 10. The second heating body 920 is powered on and heated to generate heat to heat the electrode circuit board 130, thereby indirectly heating the liquid in the electrode test groove 115, so that the liquid in the electrode test groove 115 is heated to a set temperature. The test probes 911 of the test assembly 90 are in communication with the output end of the electrode circuit board 130, and transmit the current and voltage signals generated on the electrode circuit board 130 to the host computer, so as to realize the test of the calibration liquid and the test liquid. When the test card assembly 10 completes all processes of liquid pumping, heating and testing, the fourth driving device 730 makes the heating assembly 70 retreat, and the fifth driving device 940 makes the test assembly 90 retreat, so as to take out the test card.

[0094] In the embodiment, the first driving device 520, the second driving device 320, the third driving device 450, the fourth driving device 730 and the fifth driving device 940 are all stepping motors, and the first driving device 520, the second driving device 320, the third driving device 450, the fourth driving device 730 and the fifth driving device 940 can also adopt other driving modes such as other cylinders according to actual needs.

[0095] Compared with the conventional blood gas analyzer, the blood gas analyzer has the following advantages:

[0096] 1. The test card assembly 10 does not need a steel needle puncture action, effectively solving the test card debris problem; a secondary waste liquid chamber is designed, the liquid inlet 1434 is designed at the lower end, and the liquid outlet 1435 is designed at the upper end, solving the problem of liquid leakage from the air suction port 113; the calibration liquid pipeline 142 is higher than the test liquid pipeline 141, and a leakage prevention groove 1421 is designed at the highest position, solving the problem of liquid leakage from the calibration liquid port 112; the valve groove 1411 is designed on the test liquid pipeline 141 and constitutes an integral part with the test liquid pipeline 141, without the need for cylindrical rubber plugs, film-attached parts, reducing the number of parts, reducing the risk of liquid leakage, and improving production efficiency.

[0097] 2. The reagent pack assembly 20 controls the opening and closing of the liquid path and the gas path by the rotary switch assembly 210 and the reagent pack valve control assembly 30, and the rotary switch technology is mature and reliable in action, effectively solving the problems of reagent pack pipeline blockage and liquid leakage; the on-off of each liquid path of the liquid suction subsystem is controlled by an independent stepping motor, so each on-off action can be performed simultaneously, without the waiting time for the rotation of the existing original rotary disc system, so the working cycle can be shortened.

[0098] 3. The on-off of each liquid path of the liquid suction subsystem is controlled by an independent stepping motor, compared with the gear transmission, spring compression and other structures in the existing original rotary disc system, the speed of the stepping motor is adjustable, the action is smooth and controllable, there is no gear rotation noise and rod impact noise, so the noise is small, and the gear set, rod, spring, roller and other parts are cancelled at the same time, reducing the number of parts, simplifying the structure and improving the assembly efficiency.

[0099] 4. The test and heating subsystem uses a stepping motor to control the pressing and loosening of the test assembly 90 and the heating assembly 70, which is stable and controllable in action, low in noise, and high in assembly precision.

[0100] 5. The test card body 110 is positioned twice by the slide buckle assembly 60, the test assembly 90 and the heating assembly 70, wherein the mechanical primary positioning is realized by the elastic force of the first compression spring 630 of the slide buckle assembly 60; the second precise positioning is realized by the second plug 721 of the heating assembly 70, thus the positioning of the test card body 110 is reliable; the front and back of the test card body 110 are positioned by the test assembly 907 and the heating assembly 703 respectively, thus the test card body 110 is uniformly stressed and is not deformed by stress; the stepping motor action of the test assembly 90 is fully utilized, the structure of the pushing rib 931 and the matching rib 612 is designed ingeniously to realize the position control of the test assembly 90 on the slide buckle assembly 60, and the action is reliable.

[0101] The technical features of the above-described embodiments can be combined in any manner. To make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as falling within the scope of the present disclosure.

[0102] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, however, it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, various modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A test card assembly for connection to a reagent pack assembly of a blood gas analyzer, characterized in that, The test card assembly includes at least a test card body with a calibration liquid port. The test card body also includes a liquid pipeline, a sample inlet, a vacuum port, and an electrode circuit board. The test card assembly also includes a sample injection needle, which is fixed to the sample inlet of the test card body and can communicate with a syringe containing the test liquid. Before the test card assembly is connected to the reagent pack assembly, the vacuum port and the calibration liquid port are not provided with a sealing plug. The liquid pipeline includes a test liquid pipeline, a calibration liquid pipeline, a waste liquid chamber, a waste liquid pipeline, and an electrode pipeline connected to the electrode circuit board. One end of the test liquid pipeline is connected to the sample inlet, and the other end is connected to the calibration liquid pipeline and the electrode pipeline. The end of the calibration liquid pipeline away from the test liquid pipeline is connected to the calibration liquid outlet. The end of the electrode pipeline away from the test liquid pipeline is connected to the inlet of the waste liquid chamber. The outlet of the waste liquid chamber is connected to the exhaust port. The outlet is located above the inlet. The waste liquid pipeline is connected between the outlet and the exhaust port. The highest point of the calibration liquid pipeline is higher than the liquid surface of the test liquid. The highest point of the calibration liquid pipeline has an upward-facing anti-leakage groove. There is a cross-sectional difference between the anti-leakage groove and the calibration liquid pipeline. The test card assembly also includes a sealing membrane, which is disposed on the side of the test card body facing away from the electrode circuit board. The sealing membrane is used to seal the liquid pipeline. A valve groove is provided on the opposite side of the test liquid pipeline and the sealing membrane. When the sealing membrane is attached to the valve groove, the test liquid pipeline is closed. When the sealing membrane leaves the valve groove, the test liquid pipeline is opened.

2. The test card assembly according to claim 1, characterized in that, The valve groove is disposed in the test liquid pipeline and is integral with the test liquid pipeline. The bottom of the valve groove has a protrusion that protrudes towards the sealing membrane. When the sealing membrane is filled into the valve groove, the protrusion can be inserted into the sealing membrane. The sealing membrane 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. The PET film covers the side of the elastic silicone film facing away from the valve groove. 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 bottom of the first waste liquid chamber is provided with the inlet port, and the top of the second waste liquid chamber is provided with the outlet port. The drain port is located on the side close to the outlet port. Both the first waste liquid chamber and the second waste liquid chamber are provided with support columns to prevent the sealing membrane on the test card from falling into the waste liquid chamber when air is drawn through the air extraction port.

3. A test card assembly for connection to a reagent pack assembly of a blood gas analyzer, characterized in that, The test card assembly includes at least a test card body with a calibration liquid port. The test card body also includes a liquid pipeline, a sample inlet, a gas extraction port, and an electrode circuit board. The test card assembly also includes a sample injection needle, which is fixed to the sample inlet of the test card body and can communicate with a syringe containing the test liquid. Before the test card assembly is connected to the reagent pack assembly, the gas extraction port is not provided with a sealing plug. The liquid pipeline includes a test liquid pipeline, a calibration liquid pipeline, a waste liquid chamber, a waste liquid pipeline, and an electrode pipeline connected to the electrode circuit board. One end of the test liquid pipeline is connected to the sample inlet, and the other end is connected to the calibration liquid pipeline and the electrode pipeline. The end of the calibration liquid pipeline away from the test liquid pipeline is connected to the calibration liquid port. The end of the electrode pipeline away from the test liquid pipeline is connected to the inlet of the waste liquid chamber. The outlet of the waste liquid chamber is connected to the air extraction port. The outlet is located above the inlet. The waste liquid pipeline connects the outlet and the air extraction port. The test card assembly also includes a sealing film, which is disposed on the side of the test card body facing away from the electrode circuit board. The sealing film is applied in a planar and large-area manner to seal the entire liquid pipeline.

4. A test card assembly for connection to a reagent pack assembly of a blood gas analyzer, characterized in that, The test card assembly includes at least a test card body with a calibration liquid port, and the test card body has a liquid pipe, a sample inlet, an air extraction port, and an electrode circuit board; Before the test card assembly is connected to the reagent kit assembly, the air extraction port is not fitted with a sealing plug; The liquid pipeline includes a test liquid pipeline, a waste liquid chamber, and an electrode pipeline connected to the electrode circuit board. Both ends of the test liquid pipeline are connected to the sample inlet and the electrode pipeline, respectively. The end of the electrode pipeline away from the test liquid pipeline is connected to the inlet of the waste liquid chamber. The outlet of the waste liquid chamber is connected to the exhaust port. The outlet is located above the inlet. The liquid pipeline also includes a waste liquid pipeline, which is connected between the outlet and the exhaust port. The test card assembly also includes a sealing membrane for sealing the liquid pipeline, the sealing membrane being disposed on the side of the test card body facing away from the electrode circuit board.

5. The test card assembly according to claim 4, characterized in that, The test card body includes a calibration liquid port. Before the test card assembly is connected to the reagent pack assembly, the calibration liquid port is not sealed. The liquid pipeline includes a calibration liquid pipeline. One end of the test liquid pipeline connected to the electrode pipeline is also connected to the calibration liquid pipeline. The end of the calibration liquid pipeline away from the test liquid pipeline is connected to the calibration liquid port. The highest point of the calibration liquid pipeline is higher than the surface of the test liquid.

6. The test card assembly according to claim 4 or 5, characterized in that, A valve groove is provided on the opposite side of the test liquid pipeline and the sealing membrane. When the sealing membrane is attached to the valve groove, the test liquid pipeline is closed. When the sealing membrane leaves the valve groove, the test liquid pipeline is opened. The valve groove is disposed in the test liquid pipeline and is integral with the test liquid pipeline. The bottom of the valve groove has a protrusion that protrudes towards the sealing membrane. When the sealing membrane is filled into the valve groove, the protrusion can be inserted into the sealing membrane. The sealing membrane 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. The PET film covers the side of the elastic silicone film facing away from the valve groove.

7. A blood gas analyzer, characterized in that, The test card assembly and reagent kit assembly as described in any one of claims 1 to 3 are included. The reagent kit assembly includes at least a rotary switch assembly, a liquid storage device, an air inlet device, and a sample injection device equipped with an injection needle. The rotary switch assembly includes a fixed valve body and a rotating body. The rotating body is disposed inside the fixed valve body and can rotate relative to the fixed valve body. The rotating body is provided with a connecting pipe. The fixed valve body is provided with a first port communicating with the liquid storage device, a second port communicating with the sample injection device, and a third port communicating with the air inlet device. The two ends of the injection needle are respectively used to communicate with the second port and the calibration liquid port. Rotating the rotating body allows the rotary switch assembly to be in a first state, a second state, or a third state: the first state is that the second port is connected to the first port through the connecting pipe; the second state is that the second port is connected to the third port through the connecting pipe; the third state is that both the second port and the first port are closed. The reagent kit assembly also includes a housing with a placement cavity, the fixed valve body is fixed in the placement cavity, the connecting pipe is an L-shaped pipe, the housing is provided with a rotating handle connected to the rotating body, and the rotating handle is exposed on the housing. When in use, rotating the rotating handle can adjust the rotating switch assembly to different states. The reagent kit assembly also includes a support base, which is fixed to the outer shell. The injection device includes the injection needle and the injection tube. The injection needle is fixed to the support base and is used to connect to the calibration liquid port. One end of the injection tube is sleeved on the injection needle, and the other end is sleeved on the second port. The injection needle communicates with the second port through the injection tube.

8. The blood gas analyzer according to claim 7, characterized in that, The blood gas analyzer also includes a piston pump assembly, which includes a suction needle with one end connected to the suction port, a suction tube with one end connected to the other end of the suction needle, a connector connected to the other end of the suction tube, a piston connected to the connector, and a third drive device for driving the piston to perform linear reciprocating motion. The suction needle and the suction tube are fixed on the support base of the reagent pack assembly.

9. The blood gas analyzer according to claim 8, characterized in that, The reagent kit assembly also includes a sealing element, which is fitted onto the liquid inlet needle and the air extraction needle. The outer wall of the test card body is provided with a sealing groove that matches the shape of the sealing element.

10. The blood gas analyzer according to claim 8, characterized in that, The blood gas analyzer also includes a sliding fastener assembly, which is disposed opposite to the test card body and located on the side of the test card body facing the electrode circuit board. The sliding fastener assembly includes a slider, a first fixing seat, and a first compression spring with its two ends respectively abutting against the slider and the first fixing seat. The slider has a first plug protruding towards one side of the test card body, and the test card body has a first limiting groove that cooperates with the first plug. After the test card assembly is inserted into the reagent pack assembly, the slider, under the action of the first compression spring, causes the first plug on the slider to be inserted into the first limiting groove, thereby positioning the test card body.

11. The blood gas analyzer according to claim 10, characterized in that, The blood gas analyzer also includes a heating assembly, which is disposed opposite to the test card body and located on the side of the test card body facing away from the electrode circuit board. The heating assembly includes a first heating element disposed opposite to the electrode circuit board, a heating element fixing bracket fixed to the first heating element, and a fourth driving device for driving the heating element fixing bracket to reciprocate towards the electrode circuit board. The heating element fixing bracket is provided with a second plug protruding towards the test card body. The test card body is provided with a second limiting groove that cooperates with the second plug. After the test card assembly is inserted into the reagent pack assembly, the slider, under the action of the first compression spring, causes the first plug on the slider to be inserted into the first limiting groove, thereby achieving the initial positioning of the test card body. Under the action of the fourth driving device, the second plug moves toward the test card body and inserts into the second limiting groove to achieve secondary positioning of the test card body. The first heating element heats the liquid inside the test card body to reach the specified temperature. The sliding buckle assembly and the heating assembly perform bilateral positioning of the front and back of the test card body. When the rotary switch assembly is in the first state, the liquid storage device is connected to the injection device, and the calibration solution can be extracted; when the rotary switch assembly is in the second state, the injection device is connected to the air inlet device, and air can be extracted; when the rotary switch assembly is in the third state, both the second port and the first port are closed, and the injection device is turned off to extract the test solution.

12. A blood gas analyzer according to claim 11, characterized in that, The fixed valve body is interference-fitted with the rotating body, and the pipe is sealed directly by utilizing the wall surface of the rotating body; The reagent kit assembly includes a housing with a placement cavity, the fixed valve body is fixed inside the placement cavity, and the housing is provided with a rotating handle connected to the rotating body, and the rotating handle is exposed on the housing; The liquid storage device is a calibration liquid bag disposed in the placement cavity. The calibration liquid bag is provided with a liquid outlet tube, which is sleeved on the first tube opening. The outer shell includes a front shell and a rear shell, which are detachably connected to facilitate the installation of the calibration liquid bag. The front shell and the rear shell are fixed together by screws. A status indicator is provided on the outer shell near the rotary handle to help the user understand the current status of the rotary switch assembly. The blood gas analyzer also includes a reagent pack valve control assembly, which further includes a rotating cover sleeved on the rotating body and a second driving device for driving the rotating cover to rotate. The second driving device drives the rotating cover and the rotating body to rotate. The second driving device is a rotary stepper motor with a first motor shaft. The rotating cover is designed with an optocoupler sensing wall and is fixed to the first motor shaft by screws. The reagent package valve control assembly also includes a first optical coupler; The third driving device is a linear stepper motor with a second motor shaft. The piston pump assembly also includes a piston pump sub-assembly with the piston and the connector, a second optocoupler, and a first fixed bracket. The piston pump assembly also includes a pump body. The piston pump assembly is fitted into the first fixed bracket. The piston is threadedly connected to the second motor shaft. The third driving device is fixed to the first fixed bracket by screws and simultaneously fixes the piston pump assembly. The blood gas analyzer also includes a test valve assembly with a pressure-retaining element. A valve groove is provided on the opposite side of the test liquid pipeline and the sealing membrane. The sealing membrane is located between the valve groove and the pressure-retaining element. The pressure-retaining element is provided with a pressure head that matches the shape of the valve groove. The test valve assembly also includes a first driving device that drives the pressing member to reciprocate toward one side of the valve groove, a third optocoupler, the first driving device being a linear stepper motor with a third motor shaft, and the pressing member being fixed to the third motor shaft by threads; The fourth driving device is a linear stepper motor with a fourth motor shaft. The heating assembly also includes a fourth optocoupler, a heating element fixing cover, a motor fixing bracket, and a second guide shaft mounted on the motor fixing bracket. The heating element fixing bracket and the heating element fixing cover are provided with mutually cooperating fasteners. The fourth driving device is fixed to the motor fixing bracket by screws. The heating element fixing bracket is fitted onto the second guide shaft of the motor fixing bracket and is threadedly connected to the fourth motor shaft. The first heating element is fixed to the heating element fixing bracket by the heating element fixing cover. The blood gas analyzer also includes a pop-up assembly located directly below the test card body. The pop-up assembly includes a second fixing seat, a pressing block disposed opposite to the bottom of the test card body, and a second compression spring whose two ends respectively abut against the second fixing seat and the pressing block. After the test card assembly is inserted into the reagent pack assembly, the sliding fastener assembly and the heating assembly fix the test card body in place, the pressing block is pressed down, and the second compression spring is compressed. After the test is completed, the sliding fastener assembly and the heating assembly release the fixation of the test card body, and the pressing block rebounds upward under the action of the second compression spring, realizing the automatic pop-up of the test card body. The blood gas analyzer also includes a testing component, which is disposed opposite to the test card body and located on the side of the test card body facing the electrode circuit board. The testing component includes a detection module, a second heating element disposed opposite to the electrode circuit board, a housing on which the detection module and the second heating element are fixed, and a fifth driving device that drives the housing to reciprocate toward the electrode circuit board. The slider is located above the housing, and the bottom of the slider has a mating rib protruding toward one side of the housing. The top of the housing has a pushing rib protruding toward one side of the slider, and the pushing rib is located between the mating rib and the test card body. After the test card component is inserted into the reagent pack component, the fifth driving device drives the second heating element on the housing to move toward the electrode circuit board. After the test is completed, the fifth driving device of the test component drives the housing to retract, the pushing rib continues to retract with the housing, the slider retracts together with the pushing rib, the first compression spring is compressed, and the first plug on the slider is disengaged from the first limiting groove; The fifth driving device is a linear stepper motor with a fifth motor shaft, the detection module is a test PCBA assembly, the test PCBA assembly is equipped with test probes, the housing is fixed to the fifth motor shaft by screws, and the test assembly also includes a fifth optocoupler; The test card body is also provided with an electrode test slot. The test card assembly, the heating assembly, and the test assembly constitute the testing and heating subsystem of the blood gas analyzer. The test card assembly is inserted into the reagent pack assembly. The first heating element of the heating assembly is directly opposite the position of the electrode test slot on the test card body. The second heating element and the test probe of the test assembly correspond to the electrode circuit board on the test card body.

13. A blood gas analyzer, characterized in that, The system includes a test card assembly and a reagent kit assembly. The test card assembly can be connected to the reagent kit assembly of the blood gas analyzer. The test card assembly includes at least a test card body with a calibration liquid port. The test card body has a liquid pipeline, a sample inlet, a gas extraction port, and an electrode circuit board. Before the test card assembly is connected to the reagent kit assembly, the air extraction port is not fitted with a sealing plug; The liquid pipeline includes a test liquid pipeline, a waste liquid chamber, and an electrode pipeline connected to the electrode circuit board. Both ends of the test liquid pipeline are connected to the sample inlet and the electrode pipeline, respectively. The end of the electrode pipeline away from the test liquid pipeline is connected to the inlet of the waste liquid chamber. The outlet of the waste liquid chamber is connected to the exhaust port. The outlet is located above the inlet. The liquid pipeline also includes a waste liquid pipeline, which is connected between the outlet and the exhaust port. The reagent kit assembly includes at least a rotary switch assembly, a liquid storage device, an air inlet device, and a sample injection device equipped with an injection needle. The rotary switch assembly includes a fixed valve body and a rotating body. The rotating body is disposed inside the fixed valve body and can rotate relative to the fixed valve body. The rotating body is provided with a connecting pipe. The fixed valve body is provided with a first port communicating with the liquid storage device, a second port communicating with the sample injection device, and a third port communicating with the air inlet device. The two ends of the injection needle are respectively connected to the second port and the calibration liquid port. Rotating the rotating body allows the rotary switch assembly to be in a first state, a second state, or a third state: the first state is that the second port is connected to the first port through the connecting pipe; the second state is that the second port is connected to the third port through the connecting pipe; the third state is that both the second port and the first port are closed. When the rotary switch assembly is in the first state, the liquid storage device is connected to the injection device, and the calibration solution can be extracted; when the rotary switch assembly is in the second state, the injection device is connected to the air inlet device, and air can be extracted; when the rotary switch assembly is in the third state, both the second port and the first port are closed, and the injection device is closed to extract the test solution. The reagent kit assembly also includes a housing with a placement cavity, the fixed valve body is fixed in the placement cavity, the connecting pipe is an L-shaped pipe, the housing is provided with a rotating handle connected to the rotating body, and the rotating handle is exposed on the housing. When in use, rotating the rotating handle can adjust the rotating switch assembly to different states. The reagent kit assembly also includes a support base, which is fixed to the outer shell. The injection device includes the injection needle and the injection tube. The injection needle is fixed to the support base and is used to connect to the calibration liquid port. One end of the injection tube is sleeved on the injection needle, and the other end is sleeved on the second port. The injection needle communicates with the second port through the injection tube.

14. The blood gas analyzer according to claim 13, characterized in that, The blood gas analyzer also includes a piston pump assembly, which includes a suction needle with one end connected to the suction port, a suction tube with one end connected to the other end of the suction needle, a connector connected to the other end of the suction tube, a piston connected to the connector, and a third drive device for driving the piston to perform linear reciprocating motion. The suction needle and the suction tube are fixed on the support base of the reagent pack assembly.

15. The blood gas analyzer according to claim 13 or 14, characterized in that, The test card body includes a calibration liquid port, and the calibration liquid port is not provided with a sealing plug before the test card assembly is connected to the reagent pack assembly; The liquid pipeline includes a calibration solution pipeline. One end of the test solution pipeline connected to the electrode pipeline is also connected to the calibration solution pipeline. The end of the calibration solution pipeline away from the test solution pipeline is connected to the calibration solution port. The highest point of the calibration solution pipeline is higher than the surface of the test solution.

16. A blood gas analyzer, comprising a test card assembly and a reagent kit assembly, characterized in that, The test card assembly includes at least a test card body with a calibration liquid port. The test card body also includes a liquid pipeline, a sample inlet, a vacuum port, and an electrode circuit board. The liquid pipeline includes a test liquid pipeline, a waste liquid chamber, and an electrode pipeline connected to the electrode circuit board. The two ends of the test liquid pipeline are respectively connected to the sample inlet and the electrode pipeline. The end of the electrode pipeline away from the test liquid pipeline is connected to the liquid inlet of the waste liquid chamber. The liquid outlet of the waste liquid chamber is connected to the vacuum port, and the liquid outlet is located above the liquid inlet. Before the test card assembly is connected to the reagent kit assembly, the air extraction port is not fitted with a sealing plug; When the test card assembly is connected to the reagent pack assembly, since the air extraction port is not sealed, the air extraction port is directly connected to the reagent pack assembly, and there is no problem of debris being generated due to the air extraction needle on the reagent pack assembly piercing the sealing plug.

17. The blood gas analyzer according to claim 16, characterized in that, The reagent kit assembly includes at least a rotary switch assembly, a liquid storage device, an air inlet device, and a sample injection device equipped with an injection needle. The rotary switch assembly includes a fixed valve body and a rotating body. The rotating body is disposed inside the fixed valve body and can rotate relative to the fixed valve body. The rotating body is provided with a connecting pipe. The fixed valve body is provided with a first port communicating with the liquid storage device, a second port communicating with the sample injection device, and a third port communicating with the air inlet device. The two ends of the injection needle are respectively connected to the second port and the calibration liquid port. Rotating the rotating body allows the rotary switch assembly to be in a first state, a second state, or a third state: the first state is that the second port is connected to the first port through the connecting pipe; the second state is that the second port is connected to the third port through the connecting pipe; the third state is that both the second port and the first port are closed. When the rotary switch assembly is in the first state, the liquid storage device is connected to the injection device, and the calibration solution can be extracted. When the rotary switch assembly is in the second state, the sample injection device is connected to the air inlet device, and air can be extracted; when the rotary switch assembly is in the third state, both the second port and the first port are closed, and the sample injection device is closed to extract the test liquid. The reagent kit assembly also includes a support base, which is fixed to the outer shell of the reagent kit assembly. The injection device includes the injection needle and the injection tube. The injection needle is fixed to the support base and is used to connect to the calibration liquid port. One end of the injection tube is sleeved on the injection needle, and the other end is sleeved on the second tube port. The injection needle communicates with the second tube port through the injection tube. The liquid pipeline also includes a waste liquid pipeline, and the waste liquid pipeline is connected between the liquid outlet and the air extraction port.

18. A reagent pack assembly for a blood gas analyzer, characterized in that, The reagent kit assembly includes at least a rotary switch assembly, a liquid storage device, an air inlet device, and a sample injection device equipped with an inlet needle. The rotary switch assembly includes a fixed valve body with a first port communicating with the liquid storage device, a second port communicating with the sample injection device, and a third port communicating with the air inlet device, and a rotating body with a connecting pipe. The rotating body is disposed inside the fixed valve body and can rotate relative to the fixed valve body to achieve communication between the first port and the second port, or between the second port and the third port, or to close the second port. Rotating the rotating body allows the rotary switch assembly to be in a first state, a second state, or a third state: the first state is that the second port is connected to the first port through the connecting pipe; the second state is that the second port is connected to the third port through the connecting pipe; the third state is that both the second port and the first port are closed. The reagent kit assembly also includes a housing with a placement cavity, the fixed valve body is fixed in the placement cavity, the connecting pipe is an L-shaped pipe, the housing is provided with a rotating handle connected to the rotating body, and the rotating handle is exposed on the housing. When in use, rotating the rotating handle can adjust the rotating switch assembly to different states. The reagent kit assembly also includes a support base, which is fixed to the outer shell. The injection device includes the injection needle and the injection tube. The injection needle is fixed to the support base and is used to connect to the calibration port of the test card assembly. One end of the injection tube is sleeved on the injection needle, and the other end is sleeved on the second port. The injection needle communicates with the second port through the injection tube. The test card assembly includes at least a test card body with the calibration liquid port. The test card body also includes a liquid pipeline, a sample inlet, an air extraction port, and an electrode circuit board. Before the test card assembly is connected to the reagent pack assembly, the air extraction port of the test card assembly is not provided with a sealing plug. The liquid pipeline includes a test liquid pipeline, a waste liquid chamber, and an electrode pipeline connected to the electrode circuit board. The two ends of the test liquid pipeline are respectively connected to the sample inlet and the electrode pipeline. The end of the electrode pipeline away from the test liquid pipeline is connected to the inlet of the waste liquid chamber. The outlet of the waste liquid chamber is connected to the exhaust port. The outlet is located above the inlet. The liquid pipeline also includes a waste liquid pipeline, which is connected between the outlet and the exhaust port.

19. The reagent package assembly according to claim 18, characterized in that, The air intake device is an air pipe fitted onto the third pipe opening. The air pipe is connected to the atmosphere and directly draws air from the atmosphere. When the test card assembly is connected to the reagent kit assembly, the calibration liquid port of the test card body is connected to the liquid inlet needle on the support base, and the air extraction port of the test card body is connected to the air extraction needle fixed on the support base.

20. A reagent pack assembly for a blood gas analyzer, characterized in that, The reagent kit assembly includes at least a rotary switch assembly, a liquid storage device, an air inlet device, and a sample injection device equipped with an inlet needle. The rotary switch assembly includes a fixed valve body with a first port communicating with the liquid storage device, a second port communicating with the sample injection device, and a third port communicating with the air inlet device, and a rotating body with a connecting pipe. The rotating body is disposed inside the fixed valve body and can rotate relative to the fixed valve body to achieve communication between the first port and the second port, or between the second port and the third port, or to close the second port. Rotating the rotating body allows the rotary switch assembly to be in a first state, a second state, or a third state: the first state is that the second port is connected to the first port through the connecting pipe; the second state is that the second port is connected to the third port through the connecting pipe; the third state is that both the second port and the first port are closed. Before the test card assembly is connected to the reagent kit assembly, the air extraction port of the test card assembly is not sealed. When the test card assembly is connected to the reagent pack assembly, the reagent pack assembly is directly connected to the air extraction port of the test card assembly, eliminating the problem of debris being generated due to puncturing the sealing plug and eliminating the risk of debris contaminating the electrode and causing the test to be scrapped. The test card assembly includes at least a test card body with a calibration liquid port. The test card body also includes a liquid pipeline, a sample inlet, an air extraction port, and an electrode circuit board. The liquid pipeline includes a test liquid pipeline, a waste liquid chamber, and an electrode pipeline connected to the electrode circuit board. The two ends of the test liquid pipeline are respectively connected to the sample inlet and the electrode pipeline. The end of the electrode pipeline away from the test liquid pipeline is connected to the inlet of the waste liquid chamber. The outlet of the waste liquid chamber is connected to the air extraction port. The outlet is located above the inlet. The liquid pipeline also includes a waste liquid pipeline. The waste liquid pipeline is connected between the outlet and the air extraction port. The reagent kit assembly also includes a support base, which is fixed to the outer shell of the reagent kit assembly. The injection device includes the injection needle and the injection tube. The injection needle is fixed to the support base and is used to connect to the calibration liquid port. One end of the injection tube is sleeved on the injection needle, and the other end is sleeved on the second port. The injection needle communicates with the second port through the injection tube.

21. A blood gas analyzer, characterized in that, Includes reagent kit components and test card components; The test card assembly includes at least a test card body with a calibration liquid port. The test card body also includes a liquid pipeline, a sample inlet, a suction port, and an electrode circuit board. The liquid pipeline includes a test liquid pipeline, a waste liquid chamber, and an electrode pipeline connected to the electrode circuit board. Both ends of the test liquid pipeline are connected to the sample inlet and the electrode pipeline, respectively. The end of the electrode pipeline away from the test liquid pipeline is connected to the inlet of the waste liquid chamber. The outlet of the waste liquid chamber is connected to the suction port. The outlet is located above the inlet. The liquid pipeline also includes a waste liquid pipeline. The waste liquid pipeline is connected between the outlet and the suction port. The suction port is located below the electrode pipeline, the inlet is located above the electrode pipeline, and the outlet is located above the suction port. Before the test card assembly is connected to the reagent kit assembly, the air extraction port is not fitted with a sealing plug; The reagent kit assembly includes at least a rotary switch assembly, a liquid storage device, an air inlet device, and a sample injection device equipped with an injection needle. The rotary switch assembly includes a fixed valve body and a rotating body. The rotating body is disposed inside the fixed valve body and can rotate relative to the fixed valve body. The rotating body is provided with a connecting pipe. The fixed valve body is provided with a first port communicating with the liquid storage device, a second port communicating with the sample injection device, and a third port communicating with the air inlet device. The two ends of the injection needle are respectively used to communicate with the second port and the calibration liquid port. Rotating the rotating body allows the rotary switch assembly to be in a first state, a second state, or a third state: the first state is that the second port is connected to the first port through the connecting pipe; the second state is that the second port is connected to the third port through the connecting pipe; the third state is that both the second port and the first port are closed. When the rotary switch assembly is in the first state, the liquid storage device is connected to the injection device, and the calibration solution can be extracted. When the rotary switch assembly is in the second state, the sample injection device is connected to the air inlet device, and air can be extracted. When the rotary switch assembly is in the third state, both the second port and the first port are closed, and the sample injection device is turned off to extract the test solution.

22. A blood gas analyzer according to claim 21, characterized in that, After the test card assembly is connected to the reagent pack assembly, when the blood gas analyzer extracts calibration solution, extracts air, and extracts test solution, the test card assembly is still connected to the reagent pack assembly, and the inlet needle is still connected to the calibration solution port.

23. A blood gas analyzer according to claim 22, characterized in that, The reagent kit assembly also includes a housing with a placement cavity, the fixed valve body is fixed in the placement cavity, the connecting pipe is an L-shaped pipe, the housing is provided with a rotating handle connected to the rotating body, and the rotating handle is exposed on the housing. When in use, rotating the rotating handle can adjust the rotating switch assembly to different states. The reagent kit assembly also includes a support base, which is fixed on the outer shell. The injection device includes the injection needle and the injection tube. The injection needle is fixed on the support base and is used to connect with the calibration liquid port. One end of the injection tube is sleeved on the injection needle, and the other end is sleeved on the second tube port. The injection needle communicates with the second tube port through the injection tube. The blood gas analyzer also includes a piston pump assembly, which includes a suction needle with one end connected to the suction port, a suction tube with one end connected to the other end of the suction needle, a connector connected to the other end of the suction tube, a piston connected to the connector, and a third drive device for driving the piston to perform linear reciprocating motion. The suction needle and the suction tube are fixed on the support base of the reagent pack assembly.

24. A blood gas analyzer according to any one of claims 21 to 23, characterized in that, The blood gas analyzer also includes a sliding fastener assembly, which is disposed opposite to the test card body and located on the side of the test card body facing the electrode circuit board. The sliding fastener assembly includes a slider, a first fixing seat, and a first compression spring with its two ends respectively abutting against the slider and the first fixing seat. The slider has a first plug protruding towards one side of the test card body, and the test card body has a first limiting groove that cooperates with the first plug. After the test card assembly is inserted into the reagent pack assembly, the slider, under the action of the first compression spring, causes the first plug on the slider to be inserted into the first limiting groove, thereby positioning the test card body. The blood gas analyzer also includes a heating assembly, which is disposed opposite to the test card body and located on the side of the test card body facing away from the electrode circuit board. The heating assembly includes a first heating element disposed opposite to the electrode circuit board, a heating element fixing bracket fixed to the first heating element, and a fourth driving device that drives the heating element fixing bracket to reciprocate towards the electrode circuit board. The heating element fixing bracket has a second plug protruding towards the test card body. The test card body has a second limiting groove that mates with the second plug. After the test card assembly is inserted into the reagent pack assembly, the slider, under the action of the first compression spring, causes the first plug on the slider to insert into the first limiting groove, achieving initial positioning of the test card body. Under the action of the fourth driving device, the second plug moves towards the test card body and inserts into the second limiting groove, achieving secondary positioning of the test card body. The first heating element heats the liquid inside the test card body to reach a specified temperature. The sliding assembly and the heating assembly perform bilateral positioning of the front and back of the test card body.

25. A test card assembly capable of connecting to a reagent pack assembly for a blood gas analyzer, characterized in that, The test card assembly includes at least a test card body with a calibration liquid port. The test card body also includes a liquid pipeline, a sample inlet, a suction port, and an electrode circuit board. The liquid pipeline includes a test liquid pipeline, a waste liquid chamber, and an electrode pipeline connected to the electrode circuit board. Both ends of the test liquid pipeline are connected to the sample inlet and the electrode pipeline, respectively. The end of the electrode pipeline away from the test liquid pipeline is connected to the inlet of the waste liquid chamber. The outlet of the waste liquid chamber is connected to the suction port. The outlet is located above the inlet. The liquid pipeline also includes a waste liquid pipeline. The waste liquid pipeline is connected between the outlet and the suction port. The suction port is located below the electrode pipeline, the inlet is located above the electrode pipeline, and the outlet is located above the suction port. Before the test card assembly is connected to the reagent kit assembly, the extraction port is not fitted with a sealing plug.

26. The test card assembly according to claim 25, characterized in that, The liquid pipeline includes a calibration solution pipeline. One end of the test solution pipeline is connected to the injection port, and the other end is connected to the calibration solution pipeline and the electrode pipeline. The end of the calibration solution pipeline away from the test solution pipeline is connected to the calibration solution port. The highest point of the calibration solution pipeline is higher than the liquid surface of the test solution. The highest point of the calibration solution pipeline has an upward-facing anti-leakage groove. There is a cross-sectional difference between the anti-leakage groove and the calibration solution pipeline. Before the test card assembly is connected to the reagent pack assembly, neither the air extraction port nor the calibration liquid port is fitted with a sealing plug.

27. The test card assembly according to claim 26, characterized in that, The waste liquid chamber includes 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 bottom of the first waste liquid chamber is provided with the inlet port, and the top of the second waste liquid chamber is provided with the outlet port. The drain port is located on the side close to the outlet port and connects the top of the first waste liquid chamber and the second waste liquid chamber. There is a cross-sectional difference between the drain port and the waste liquid chamber. The first waste liquid chamber and the second waste liquid chamber are located above the electrode pipe.

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