Sample rack reuse method

Abstract

The present invention provides a sample rack reuse method, relating to the field of medical device technology. The sample rack reuse method includes the following steps: placing tubes to be tested, transporting the tubes to be tested, coding the tubes to be tested, recovering the tubes, and recording test results. In the tube coding step, a scanning device scans the codes on the sample rack and the tubes to be tested and transmits the scanned information to a control unit. The control unit compares the scanned information with historical information and codes the sample rack. After a predetermined time, the control unit controls a transport unit to transport the sample rack to a recovery unit. The control unit then queries a target analysis unit for the test results of the tubes loaded on the sample rack returned to the recovery unit and records the results. This sample rack reuse method alleviates the technical problems of the prior art of sample rack reuse, which are labor-intensive and may lead to test failures, while also achieving cost savings.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a sample rack multiplexing method. Background Art

[0002] Currently, pipeline-type in vitro diagnostic analysis systems are commonly used to achieve rapid and efficient testing and analysis of high-throughput samples. This involves cascading multiple analytical instruments, then distributing the samples to be tested to the target analytical instruments via a transport unit. After the test is complete, the samples are recovered by the transport unit again. In this process, the test tubes containing the samples are typically loaded onto sample racks. The sample racks are pre-coded, and this code has been pre-entered into the in vitro diagnostic analysis system. This way, once the sample rack enters the in vitro diagnostic analysis system, the system knows what type of test is required and can transport it accordingly. Here, the code identifying the specific information of the sample rack is typically attached directly to the sample rack. During the transport of the sample rack, the scanning device of the in vitro diagnostic analysis system automatically scans this code to improve testing efficiency.

[0003] It should be noted that in order to save costs, users generally tear off the original code attached to the sample rack and then attach a new code or directly cover the old code with the new code to achieve the reuse of the sample rack. However, this also increases the labor intensity of the user, and if the old code is not cleaned properly, it may also cause the scanning device to fail to scan, thereby causing the test to fail. Summary of the Invention

[0004] The object of the present invention is to provide a sample rack reuse method to alleviate the technical problems of the prior art in that the reuse of sample racks is labor-intensive and may result in test failure.

[0005] In order to solve the above technical problems, the technical means adopted by the present invention are:

[0006] The sample rack multiplexing method provided by the present invention comprises the following steps:

[0007] Placing the tubes to be tested: placing the sample rack loaded with the tubes to be tested in the sampling unit;

[0008] Transporting the tubes to be tested: the control unit controls the sample injection unit to move the sample rack to the transport unit, and then controls the transport unit to transport the sample rack to the scanning device;

[0009] Coding the tubes to be tested: The scanning device scans the codes on the sample rack and the tubes to be tested, and transmits the scanned sample rack code and the tube codes to the control unit. The control unit compares the sample rack code and the tube codes to the historical information, assigns a code to the sample rack, and establishes a corresponding relationship between the sample rack code, the tube code to be tested, and the assigned code. At the same time, the control unit controls the transport unit to transport the sample rack to the target analysis unit.

[0010] Test tube recovery: after a predetermined time, the control unit controls the transport unit to transport the sample rack to the recovery unit;

[0011] Test result recording: the control unit inquires the target analysis unit about the test result of the test tube loaded on the sample rack returned to the recovery unit and records it.

[0012] Furthermore, in the step of assigning codes to the tubes to be tested, if there is no information in the historical information that is identical to the code of the sample rack, the control unit assigns a code to the sample rack;

[0013] If the historical information contains information identical to the sample rack code, the control unit further determines whether the historical information contains information identical to the code of the tube to be tested. If not, the control unit assigns a code different from that in the historical information to the sample rack; if so, the control unit clears the sample rack code in the historical information and assigns a new code to the sample rack.

[0014] Furthermore, in the test result recording step, the control unit inquires the target analysis unit whether the test tube loaded on the sample rack returned to the recovery unit has successfully completed the test;

[0015] If the process is completed successfully, the relationship between the sample rack code, the test tube code, the assigned code, and the test result is established to replace the corresponding relationship between the sample rack code, the test tube code, and the assigned code, and the relationship is recorded to form the historical information for the next test task.

[0016] If the test is not completed successfully, the control unit inquires the target analysis unit whether retesting is required. If so, the sample rack loaded with the tubes to be retested is transported to the scanning device again, and then the steps of coding the tubes to be tested, collecting the test tubes, and recording the test results are repeated in sequence. If not, the process ends and the correspondence between the sample rack code, the tube code to be tested, and the coding established in the tube coding step is cleared.

[0017] Furthermore, if the test is not completed successfully, the target analysis unit transmits the reason for the unfinished test to the control unit, and the control unit determines whether retesting is required based on the reason for the unfinished test.

[0018] Furthermore, if the test is not completed successfully, the target analysis unit transmits the reason for the unfinished test to the control unit, and the control unit sends a prompt message to the user according to the reason for the unfinished test to inquire whether the user needs to retest.

[0019] Furthermore, after the control unit receives an instruction to retest and a predetermined time has passed, the control unit inquires the scanning device whether the code of the tube to be retested is scanned;

[0020] If yes, then execute the step of assigning a code to the tube to be tested;

[0021] If not, the control unit issues a prompt message to remind the user that the tube to be retested has not been delivered to the scanning device.

[0022] Furthermore, if retesting is required, the user places the test tube to be retested and its corresponding sample rack on the emergency device, and the emergency device detects the sample rack corresponding to the test tube to be retested and transmits the detection information to the control unit;

[0023] After receiving the detection information, the control unit issues an emergency instruction to control the emergency device and the transport unit to transport the test tube to be retested and its corresponding sample rack to the scanning device.

[0024] Furthermore, the transport unit includes a transmission channel, which is connected between the injection unit and the recovery unit and passes through the target analysis unit;

[0025] The scanning device is arranged at the front end of the conveying path of the transmission channel, and the scanning device includes a support frame, a first sensor and a second sensor;

[0026] The first sensor and the second sensor are both installed on the support frame and are used to scan the codes on the sample rack and the tube to be tested respectively.

[0027] Furthermore, the emergency device is provided in the transmission channel, and along the conveying path of the transmission channel, the emergency device is located at the front end of the scanning device;

[0028] The emergency device includes a frame, a transmission belt, a drive motor and a third sensor arranged on the frame; the transmission belt is connected to the transmission channel;

[0029] The driving motor is used to drive the conveyor belt to move toward the connection point between the conveyor belt and the transmission channel;

[0030] The third sensor is used to detect whether a sample rack exists.

[0031] Furthermore, the target analysis unit includes a plurality of independent analysis devices, each of which corresponds to a different test item;

[0032] In the step of assigning codes to the tubes to be tested, the control unit controls the conveying unit to convey the tubes to be tested to corresponding analysis equipment according to the received sample rack code and the tube code to be tested, so as to perform a preset test item.

[0033] Compared with the prior art, the sample rack multiplexing method provided by the present invention has the following technical advantages:

[0034] The sample rack reuse method provided by the present invention includes the following steps: placing tubes to be tested: placing the sample rack loaded with the tubes to be tested on a sampling unit; transporting the tubes to be tested: a control unit controls the sampling unit to move the sample rack to the transport unit, and then controls the transport unit to transport the sample rack to a scanning device; coding the tubes to be tested: a scanning device scans codes on the sample rack and the tubes to be tested, and transmits the scanned sample rack code and the tube code to be tested to the control unit, the control unit compares the sample rack code and the tube code to be tested with historical information respectively, codes the sample rack, establishes a corresponding relationship between the sample rack code, the tube code to be tested, and controls the transport unit to transport the sample rack to a target analysis unit; test tube recovery: after a predetermined time, the control unit controls the transport unit to transport the sample rack to a recovery unit; and test result recording: the control unit inquires the target analysis unit about the test results of the test tubes loaded on the sample rack returned to the recovery unit and records the test results.

[0035] As can be seen, through the above steps, the in vitro diagnostic analysis system completes the testing of the substances contained in the test tubes. The test results correspond one-to-one with the original code and the assigned code of the sample rack. The user can view the code and assigned code of the sample rack stored in the control unit to know the test results of the test tubes loaded in the sample rack. Compared with the existing technology, the user does not need to tear off the original code on the sample rack and apply a new code or directly overwrite the old code with the new code, thus achieving sample rack reuse, saving costs and reducing labor intensity. During the testing process, there is no problem of the scanning device failing to scan due to the old code not being cleaned properly, and naturally, no test failure will be caused by this. In addition, using this method, the user can accurately find the test result corresponding to the test tube in the sample rack without confusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 A flow chart of a sample rack multiplexing method provided in an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the structure of an in vitro diagnostic analysis system provided by an embodiment of the present invention;

[0039] Figure 3 A schematic structural diagram of a scanning device of an in vitro diagnostic analysis system provided by an embodiment of the present invention;

[0040] Figure 4 A schematic structural diagram of an emergency device of an in vitro diagnostic analysis system provided by an embodiment of the present invention;

[0041] Figure 5 This is a schematic structural diagram of a sample rack provided by an embodiment of the present invention.

[0042] icon:

[0043] 100-injection unit; 200-control unit;

[0044] 300 - transport unit; 310 - scanning device; 320 - emergency device; 330 - transmission channel; 311 - support frame; 312 - first sensor; 313 - second sensor; 321 - frame; 322 - transmission belt; 323 - drive motor; 324 - third sensor;

[0045] 400-target analysis unit; 500-recovery unit;

[0046] 600-sample rack; 610-test tube fixing hole; 620-sample rack code;

[0047] 700-test tube; 710-test tube code. DETAILED DESCRIPTION

[0048] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0051] refer to Figure 1 The sample rack multiplexing method provided in this embodiment includes the following steps:

[0052] Placing the tubes to be tested: placing the sample rack 600 loaded with the tubes to be tested on the sample injection unit 100; transporting the tubes to be tested: the control unit 200 controls the sample injection unit 100 to move the sample rack 600 to the transport unit 300, and then controls the transport unit 300 to transport the sample rack 600 to the scanning device 310; assigning codes to the tubes to be tested: the scanning device 310 scans the codes on the sample rack 600 and the tubes to be tested, and transmits the scanned sample rack code 620 and the tube code to be tested to the control unit 200, and the control unit 200 assigns the sample rack code 620 and the tube code to be tested to the sample rack 600. After comparing the test tube codes with the historical information, the sample rack is assigned a code, and a corresponding relationship between the sample rack code 620, the test tube code, and the assigned code is established. At the same time, the transport unit 300 is controlled to transport the sample rack 600 to the target analysis unit 400. Test tube recovery: After a predetermined time, the control unit 200 controls the transport unit 300 to transport the sample rack 600 to the recovery unit 500. Test result recording: The control unit 200 inquires the target analysis unit 400 about the test results of the test tubes 700 loaded on the sample rack 600 returned to the recovery unit 500 and records them.

[0053] As can be seen, through the above steps, the in vitro diagnostic analysis system completes the testing of the substances contained in the test tubes 700. The test results correspond one-to-one with the original codes and assigned codes of the sample rack 600. The user can view the code and assigned code of the sample rack 600 stored in the control unit 200 to obtain the test results of the test tubes 700 loaded in the sample rack 600. Compared with the prior art, the user does not need to tear off the original codes on the sample rack 600 and attach new codes, or directly overwrite the old codes with new codes. This allows the sample rack 600 to be reused, saving costs and reducing labor intensity. Furthermore, during the testing process, there is no risk of scanning failures by the scanning device 310 due to incomplete cleaning of old codes, which naturally prevents test failures. Furthermore, using this method, the user can accurately find the test results corresponding to the test tubes 700 in the sample rack 600, eliminating confusion.

[0054] Further, continue to refer to Figure 1 In the step of assigning a code to the tube to be tested, if the historical information does not contain information identical to the sample rack code 620, the control unit 200 assigns a code to the sample rack. If the historical information contains information identical to the sample rack code 620, the control unit 200 further determines whether the historical information contains information identical to the tube to be tested. If not, the control unit 200 assigns a code different from that in the historical information to the sample rack 600. If so, the control unit 200 clears the sample rack code in the historical information and assigns a new code to the sample rack 600.

[0055] Specifically, assume that there is a test tube 700 coded as 0001, which is loaded in a sample rack 600 coded as A00001. When executing the step of assigning codes to the tubes to be tested, if the sample rack 600 coded as A00001 does not exist in the historical information, the control unit 200 assigns a code to the sample rack. If the sample rack 600 coded as A00001 exists in the historical information, the control unit 200 further determines whether there is a test tube 700 coded as 0001 in the historical information. If not, the control unit 200 assigns a code different from that in the historical information to the sample rack 600. If so, the control unit 200 assigns a new code to the sample rack 600 after clearing the sample rack code in the historical information.

[0056] The advantage of this arrangement is that even if multiple sample racks 600 with the same code appear in the same batch of tests, a one-to-one correspondence can be established between each of these sample racks 600 and the different test tubes 700, the different codes, and the test results, making it easier to review the test results without errors. Furthermore, after completing a batch of tests, the same sample rack 600 can be used for the next batch of tests. Users do not need to modify the original code of the sample rack 600, i.e., they do not need to re-attach new sample rack codes 620 to the sample racks 600. This allows for the reuse of sample racks 600, improves the efficiency of sample rack 600 usage, and reduces testing costs.

[0057] In this embodiment, reference Figure 1 In the test result recording step, the control unit 200 inquires the target analysis unit 400 about the test status of the tube to be tested. The test status includes two types:

[0058] After the test is completed, the relationship between the sample rack code 620-test tube code 710-assignment code-test result is established to replace the corresponding relationship between the sample rack code 620-test tube code-assignment code, and is recorded to form the historical information of the next test task;

[0059] If the test is not completed, the control unit 200 inquires the target analysis unit 400 whether a retest is required, wherein the retest instruction is determined by the control unit 200 itself or by the user.

[0060] Multiple test tubes can be placed on the sample rack. The above-mentioned "completed test" may mean that all multiple test tubes have completed the test or a specific test tube has completed the test; the above-mentioned "uncompleted test" may mean that one of the multiple test tubes has not completed the test or all test tubes have not completed the test. The present invention does not limit this, and users can set it according to the test strategy.

[0061] First, it should be noted that there are many reasons for an incomplete test, such as sampling failure due to insufficient downward movement of the sampling needle, sampling failure due to insufficient or missing sample volume in the test tube 700, or test failure due to sample contamination. Therefore, when the control unit 200 inquires the target analysis unit 400 whether a retest is required, the control unit 200 may determine whether a retest is required based on the reason for the incomplete test, or may ask the user whether a retest is required in the form of a pop-up window.

[0062] Specifically, if the test fails due to sample contamination, the control unit 200 can determine on its own that retesting is not required, and the test of the corresponding test tube 700 is terminated; if the sampling fails due to insufficient downward distance of the sampling needle, the control unit 200 can determine on its own that retesting is required; if the sampling fails due to insufficient or missing sample volume in the test tube 700, the control unit 200 will ask the user whether retesting is required in the form of a pop-up window, and the pop-up window can also display the reason for the failure, such as insufficient sample volume.

[0063] After receiving the instruction to retest, the sample rack 600 loaded with the tubes to be retested is transported to the scanning device 310 again, and the steps of assigning codes to the tubes to be tested, collecting the tubes, and recording the test results are repeated in sequence. If retesting is not required, the process ends and the correspondence between the sample rack code 620, the tube code to be tested, and the assigned code established in the step of assigning codes to the tubes to be tested is cleared.

[0064] In one embodiment of the present application, reference Figure 1 If retesting is required, after the control unit 200 receives the instruction to retest and a predetermined time has passed, the control unit 200 inquires with the scanning device 310 whether the same scanning information as the test tube to be retested and its corresponding sample rack 600 has been scanned. If so, the control unit 200 executes the step of assigning a code to the test tube to be retested. If not, the control unit 200 issues a prompt message to remind the user that the test tube to be retested has not been delivered to the scanning device 310.

[0065] Continue to refer Figure 1 For example, suppose there is a test tube 700 with a code of 0002 that needs to be retested and is loaded into a sample rack 600 with a code of A00241. The sample rack 600 is initially coded B0006. After the control unit 200 receives the instruction that the test tube 700 needs to be retested and a predetermined time has passed, the control unit 200 inquires with the scanning device 310 whether the sample rack 600 with a code of A00241 and the test tube 700 with a code of 0002 have been scanned. If not, the control unit 200 displays a prompt message to remind the user that the test tube to be retested has not been delivered to the scanning device 310. If so, the control unit 200 clears the code B0006 and re-codes the sample rack 600 corresponding to the test tube to be retested, such as B0012, and then enters the target analysis device for retesting.

[0066] In other embodiments, if retesting is required, the user places the sample rack 600 on the emergency device 320, and the emergency device 320 detects the sample rack 600 and transmits the detection information to the control unit 200; after receiving the detection information, the control unit 200 issues an emergency instruction to control the emergency device 320 and the transport unit 300 to transport the sample rack 600 to the scanning device 310.

[0067] Specifically, in addition to the aforementioned control unit 200 controlling the transport unit 300 to transport the sample rack 600 loaded with test tubes to be retested to the scanning device 310, the user can also place the sample rack 600 loaded with test tubes to be retested on the emergency device 320. This ensures that the test tubes to be retested can be quickly transported to the scanning device 310, improving retesting efficiency and ensuring the timely testing of the substances in the test tubes 700. Furthermore, if some substances require timely testing, the control unit 200 can display a pop-up notification if the test tube 700 to be retested is not detected within a predetermined time.

[0068] In this embodiment, reference Figures 2 to 5 The transport unit 300 includes a transmission channel 330, which is connected between the injection unit 100 and the recovery unit 500 and passes through each target analysis unit 400; the scanning device 310 is arranged at the front end of the transport path of the transmission channel 330; the emergency device 320 is arranged in the transmission channel 330, and along the transport path of the transmission channel 330, the emergency device 320 is located at the front end of the scanning device 310.

[0069] Specifically, refer to Figure 2 The transmission channel 330 passes through the emergency device 320, the sample injection unit 100, the scanning device 310, the target analysis unit 400 and the recovery unit 500. The sample rack 600 entering the transmission channel 330 from the sample injection unit 100 can enter the scanning device 310, the target analysis unit 400 and the recovery unit 500 in sequence under the transportation of the transmission channel 330; because the emergency device 320 is located at the front end of the scanning device 310, the sample rack 600 entering the transmission channel 330 from the emergency device 320 can still enter the scanning device 310, the target analysis unit 400 and the recovery unit 500 in sequence under the transportation of the transmission channel 330, completing the entire testing process.

[0070] Further, refer to Figures 3 to 5The sample rack 600 is provided with a plurality of test tube fixing holes 610 for placing a plurality of test tubes 700. The sample rack code 620 for representing the sample rack information on the sample rack 600 may be a bar code, a QR code or an RFID (Radio Frequency Identification) code. The scanning device 310 includes a support frame 311, a first sensor 312, and a second sensor 313. The first sensor 312 and the second sensor 313 are both mounted on the support frame 311 and are used to scan the codes on the sample rack 600 and the tube to be tested, respectively. The emergency device 320 includes a frame 321 and a conveyor belt 322, a drive motor 323, and a third sensor 324 arranged on the frame 321. The conveyor belt 322 is connected to the transmission channel 330. The drive motor 323 is used to drive the conveyor belt 322 to move toward the connection between the conveyor belt 322 and the transmission channel 330. The third sensor 324 is used to detect whether the sample rack 600 exists.

[0071] refer to Figure 2 During testing, the workbench of the sample injection unit 100 can be used to place several sample racks 600 to be tested. These sample racks 600 to be tested enter the transmission channel 330 in sequence, then pass through the scanning device 310 and the target analysis unit 400 in sequence, and finally enter the recovery unit 500. The sample racks 600 on the workbench of the recovery unit 500 include those that have successfully completed the test and those that have not successfully completed the test.

[0072] Furthermore, the target analysis unit 400 includes multiple independent analysis devices, each of which corresponds to different test items. In the step of coding the tube to be tested, the control unit 200 controls the conveying unit 300 to convey the tube to be tested to the corresponding analysis device according to the received coding information of the tube to be tested, so as to perform the preset test items.

[0073] Specifically, the multiple analysis devices can be multiple liquid chip analysis devices, fully automatic immunofluorescence analyzers, fully automatic chemiluminescence analyzers and blood cell analyzers, etc. The test tube code 710 on the test tube 700 contains information such as the source of the sample and the test items that need to be completed. The scanning device 310 recognizes the information contained in the test tube code 710 and transmits the information to the control unit 200 to achieve the purpose of directional delivery, thereby completing the preset test items. For example, the patient with the source number P021 needs to complete the quantitative test of MPO and PR3 antigens.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sample rack multiplexing method, characterized in that: The following steps are involved: Placing the tubes to be tested: placing the sample rack loaded with the tubes to be tested in the sampling unit; Transporting the tubes to be tested: the control unit controls the sample injection unit to move the sample rack to the transport unit, and then controls the transport unit to transport the sample rack to the scanning device; Coding the tubes to be tested: the scanning device scans the codes on the sample rack and the tubes to be tested, and transmits the scanned sample rack code and the tube code to the control unit. The control unit compares the sample rack code and the tube code to be tested with historical information respectively and assigns a code to the sample rack. If there is no information identical to the sample rack code in the historical information, the control unit assigns a code to the sample rack. If there is information identical to the sample rack code in the historical information, the control unit further determines whether there is information identical to the tube code in the historical information. If not, the control unit assigns a different code to the sample rack than that in the historical information. If so, the control unit clears the sample rack code in the historical information and assigns a new code to the sample rack. The control unit also establishes a correspondence between the sample rack code, the tube code to be tested, and the code, and controls the transport unit to transport the sample rack to the target analysis unit. Test tube recovery: after a predetermined time, the control unit controls the transport unit to transport the sample rack to the recovery unit; Test result recording: The control unit inquires the target analysis unit about the test result of the test tube loaded on the sample rack returned to the recovery unit and records it. If the test result is successful, the control unit establishes a relationship between the sample rack code, the test tube code, the assigned code, and the test result to replace the corresponding relationship between the sample rack code, the test tube code, and the assigned code, and records it to form historical information for the next test task. If the test result is unsuccessful, the control unit inquires with the target analysis unit whether retesting is required. If so, the sample rack loaded with the tubes to be retested is transported to the scanning device again, and then the steps of coding the tubes to be tested, collecting the test tubes, and recording the test results are repeated in sequence. If not, the process ends and the correspondence between the sample rack code, the tube code to be tested, and the coding established in the tube coding step is cleared.

2. The sample rack multiplexing method according to claim 1, characterized in that: If the test is not completed successfully, the target analysis unit transmits the reason for the unfinished test to the control unit, and the control unit determines whether retesting is required based on the reason for the unfinished test.

3. The sample rack multiplexing method according to claim 1, characterized in that: If the test is not completed successfully, the target analysis unit transmits the reason for the unfinished test to the control unit, and the control unit sends a prompt message to the user according to the reason for the unfinished test to inquire whether the user needs to retest.

4. The sample rack multiplexing method according to claim 1, characterized in that: After the control unit receives an instruction to retest and a predetermined time has passed, the control unit inquires the scanning device whether the code of the tube to be retested is scanned; If yes, then execute the step of assigning a code to the tube to be tested; If not, the control unit issues a prompt message to remind the user that the tube to be retested has not been delivered to the scanning device.

5. The sample rack multiplexing method according to claim 1, characterized in that: If retesting is required, the user places the test tube to be retested and its corresponding sample rack on the emergency device, and the emergency device detects the sample rack corresponding to the test tube to be retested and transmits the detection information to the control unit; After receiving the detection information, the control unit issues an emergency instruction to control the emergency device and the transport unit to transport the test tube to be retested and its corresponding sample rack to the scanning device.

6. The sample rack multiplexing method according to claim 5, characterized in that: The transport unit includes a transmission channel, which is connected between the injection unit and the recovery unit and passes through the target analysis unit; The scanning device is arranged at the front end of the conveying path of the transmission channel, and the scanning device includes a support frame, a first sensor and a second sensor; The first sensor and the second sensor are both installed on the support frame and are used to scan the codes on the sample rack and the tube to be tested respectively.

7. The sample rack multiplexing method according to claim 6, characterized in that: The emergency device is arranged in the transmission channel and is located at the front end of the scanning device along the conveying path of the transmission channel; The emergency device includes a frame, a transmission belt, a drive motor and a third sensor arranged on the frame; the transmission belt is connected to the transmission channel; The driving motor is used to drive the conveyor belt to move toward the connection point between the conveyor belt and the transmission channel; The third sensor is used to detect whether a sample rack exists.

8. The sample rack multiplexing method according to any one of claims 1 to 7, characterized in that: The target analysis unit includes a plurality of independent analysis devices, each of which corresponds to a different test item; In the step of assigning codes to the tubes to be tested, the control unit controls the conveying unit to convey the tubes to be tested to corresponding analysis equipment according to the received sample rack code and the tube code to be tested, so as to perform a preset test item.

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