CN220357092U - Cleaning swab and sample analyzer - Google Patents

Abstract

The utility model relates to a medical equipment technical field especially relates to a wash swab and sample analyzer, and this wash swab includes the swab body, and the swab body is equipped with feed liquor passageway, drain passageway and runs through the cleaning channel of swab body, and cleaning channel is including the first passageway section, second passageway section and the third passageway section of mutual intercommunication, and feed liquor passageway intercommunication third passageway section, sampling needle are in the second passageway section when reset state, and the needle point of sampling needle is in for the drain passageway is kept away from to the needle mouth of sampling needle, alleviates the circumstances that the sample in the sampling needle was sucked.

Description

Cleaning swab and sample analyzer

Technical Field

The present application relates to the field of medical device technology, and in particular, to a cleaning swab and sample analyzer.

Background

The immunoassay detection equipment is subjected to several different development periods such as radioimmunoassay, fluorescent immunoassay, enzyme-labeled immunoassay, chemiluminescent immunoassay and the like, and the full-automatic chemiluminescent immunoassay is a new development stage of the current immunoassay detection, has the characteristics of environment friendliness, rapidness and accuracy, and has been widely accepted by the market.

The full-automatic immunity analyzer utilizes the specific reaction of the mutual combination of antigen and antibody to make qualitative or quantitative diagnosis analysis of the sample to be tested. The types of samples to be tested which can be supported by the full-automatic immunity analyzer comprise whole blood, serum, plasma samples and the like, and after the samples are collected for the samples, a cleaning process is needed to be executed on a sampling needle, otherwise, the instrument is polluted in a carrying way, and the test result is falsely increased.

In the prior art, a scheme of cleaning a sampling needle by adopting a cleaning swab exists, but when the sampling needle is cleaned by adopting the existing cleaning swab, a liquid outlet of the sampling needle is close to a liquid outlet of the cleaning swab, so that a sample in the sampling needle is easily sucked out, and the detection result of an analyzer is influenced.

Disclosure of Invention

The main object of the present application is to provide a cleaning swab and a sample analyzer, which aims to solve the above technical problems existing in the prior art.

In order to solve the technical problems, one technical scheme adopted by the application is as follows:

the utility model provides a wash swab, wash swab includes the swab body, the swab body is equipped with feed liquor passageway, drain channel and runs through the wash passageway of swab body, wash the passageway including first passageway section, second passageway section and the third passageway section of intercommunication each other, feed liquor passageway intercommunication the third passageway section is in order to allow the washing liquid to get into from the feed liquor passageway the third passageway section, the drain channel intercommunication first passageway section, the drain channel is used for the intercommunication negative pressure in order to allow wash the washing liquid in the wash passageway is discharged wash the passageway, wherein, wash the swab is used for wasing the sampling needle, the needle point of sampling needle is in when the state of resetting in the second passageway section.

Optionally, the radial dimension of the first channel section is greater than the radial dimension of the third channel section, and the radial dimension of the second channel section gradually decreases from the first channel section to the third channel section.

Optionally, the swab body is provided with a first annular chamber, the first annular chamber surrounds the first channel section, a first channel wall of the first channel section is provided with a channel hole which is communicated with the first channel section and the first annular chamber, the first annular chamber is communicated with the liquid outlet channel, the number of the channel holes is multiple, and the channel holes surround the second channel section.

Optionally, the channel hole is offset from the end of the liquid outlet channel near the first annular chamber; and/or, when the sampling needle is in a reset state, the channel hole and the needle opening of the sampling needle are staggered in the radial direction of the cleaning channel.

Optionally, the first channel wall comprises a first retaining wall and a second retaining wall connected to each other, the second retaining wall is closer to the second channel section than the first retaining wall, and the channel hole is formed in the first retaining wall.

Optionally, the second baffle wall is annular and is disposed around the second channel section.

Optionally, the swab body is further provided with a fourth channel section communicated with the third channel section, the radial dimension of the fourth channel section is larger than that of the third channel section, and the third channel section is communicated with the liquid inlet channel through the fourth channel section.

Optionally, the swab body is further provided with a second annular chamber, the second annular chamber surrounds the fourth channel section, the second annular chamber is communicated with the liquid inlet channel, a drainage groove communicated with the fourth channel section and the second annular chamber is formed in the second channel wall of the fourth channel section, and an extension line of the drainage groove is tangent to the wall surface of the fourth channel section.

Optionally, the swab body is equipped with inlet and liquid outlet, the inlet intercommunication the feed liquor passageway, the liquid outlet intercommunication the liquid outlet passageway, the inlet with the liquid outlet is followed wash the circumference interval setting of passageway.

To solve the above problems, the present application also provides a sample analyzer including the cleaning swab of any of the embodiments described above.

The beneficial effects of this application are: the cleaning swab comprises a swab body, the swab body is provided with a liquid inlet channel, a liquid outlet channel and a cleaning channel penetrating through the swab body, the cleaning channel comprises a first channel section, a second channel section and a third channel section which are communicated with each other, the liquid inlet channel is communicated with the third channel section, when the sampling needle is in a reset state, the needle tip of the sampling needle is positioned in the second channel section, the needle opening of the sampling needle is far away from the liquid outlet channel, and the condition that a sample in the sampling needle is sucked out can be relieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of one embodiment of a cleaning swab provided herein;

FIG. 2 is a schematic cross-sectional view taken along line A-A in FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along line B-B in FIG. 1;

fig. 4 is a schematic perspective view of a fourth section of the cleaning swab provided herein.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Furthermore, the terms "comprise," "have," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

For solving the technical problem that exists among the prior art, this application provides a sample analyzer, and sample analyzer is applied to blood analysis field or biochemical analysis field for detect the sample, and more common sample analyzer can be blood cell analyzer, and sample analyzer can also be the clinical laboratory equipment of other non-blood ball class.

The sample analyzer of the present application may be a blood cell analyzer for performing one or more of blood routine tests, specific protein tests, biochemical immunoassays, coagulation tests. Among them, blood routine tests include, but are not limited to, WBC (White Blood Cell) tests, HGB (Hemoglobin) tests, RBC (red Blood Cell) tests, DIFF (DIFF differential, five-class White Blood Cell) tests, or RET (reticulocyte count) tests. Specific proteins include, but are not limited to, SAA (serum amyloid A protein, serum amyloid A), CRP (C-reactive protein), TRF (transferrin), hs-CRP (hypersensitive C-reactive protein) and D-Dimer (D-Dimer) assays. Biochemical immunoassays include, but are not limited to. Immunoassays include, but are not limited to, detection assays for PCT (procalcitonin) and IL-6 (interleukin-6). For example, the blood cell analyzer is a joint inspection integrated machine for detecting blood routine, SAA and CRP. In other embodiments, the sample analyzer may also be a joint inspection all-in-one machine for specific protein detection and immunoassay detection, and the blood cell analyzer is detection SAA, CRP, PCT, IL-6.

The sample analyzer comprises a controller, a sample injection assembly, a detection assembly and cleaning equipment, wherein the sample injection assembly is used for providing a sample to be measured, the controller is used for controlling the sampling assembly to collect the sample to be measured from the sample injection assembly, the detection assembly is used for detecting the sample to be measured, and the cleaning equipment is used for cleaning the sampling assembly. The controller may be present as a general control module in the sample analyzer and is used to control the individual modules in the sample analyzer to achieve the corresponding functions.

In an embodiment, the detection assembly may include a fluorescence detection module, the sample analyzer of the present application may be used to perform fluorescence detection on a sample, and the sample injection assembly may include a transport module, a reagent module, a reaction module, and a magnetic separation module. When the device is used, an original sample is transferred to the sampling assembly through the transportation module, the original sample is quantitatively sampled by utilizing the sampling of the sampling assembly, and the original sample is transferred to the reaction module to wait for reaction. The reagent module is used for containing and preparing a reagent required by sample detection, the transportation module transports the reagent which is required to be added into the sample to the reagent station, and a reagent needle of the reagent module absorbs the corresponding reagent and accurately and quantitatively adds the corresponding reagent into a reaction disc of the reaction module, wherein the reagent comprises magnetic beads with specific antibodies. The sampling needle adds the original sample to the reaction plate, where the original sample is incubated for a period of time in order to bind the antigen in the original sample to the specific antibody in the reagent. After incubation, the magnetic separation module carries out magnetic separation on the incubated sample mixture, in the magnetic separation module, cells which do not react with the specific antibodies are separated through an immunomagnetic bead separation technology, and a magnetic bead composition obtained through magnetic separation is cleaned, so that reagents and other wastes which are not combined with the magnetic beads in a reaction disk are cleaned, and a sample to be detected is obtained. The fluorescence detection module detects a sample to be detected and converts photoelectric data to obtain detection data. In this embodiment, the detection assembly may include, but is not limited to, an impedance detection assembly, an optical detection assembly, a sheath flow technology detection assembly, an impedance sheath flow detection assembly.

After the sample is collected, a cleaning process is required to be performed on the sampling needle, otherwise, carrying pollution of the instrument occurs, and the test result is falsely increased. In some embodiments, a solution of cleaning the sampling needle by using a cleaning swab exists, but when the cleaning swab cleans the sampling needle, the liquid outlet of the sampling needle is close to the liquid outlet of the cleaning swab, so that the sample in the sampling needle is easier to suck out, and the detection result of the analyzer is affected.

In order to solve the above-mentioned technical problem, the present application provides a cleaning swab 100, referring to fig. 1-3, fig. 1 is a schematic perspective view of an embodiment of the cleaning swab provided in the present application, fig. 2 is a schematic sectional view taken along a line A-A in fig. 1, and fig. 3 is a schematic sectional view taken along a line B-B in fig. 1.

The cleaning swab 100 comprises a swab body 10, wherein a liquid inlet channel 11, a liquid outlet channel 12 and a cleaning channel 13 penetrating through the swab body 10 are arranged in the swab body 10. Specifically, the cleaning channel 13 may extend along the axial direction of the swab body 10, and the swab body 10 has two surfaces disposed opposite to each other in the axial direction, and the cleaning channel 13 communicates the two surfaces disposed opposite to each other such that the cleaning channel 13 penetrates the swab body 10.

In this embodiment, the swab body 10 is composed of three split modules, including a channel module provided with a cleaning channel 13, a main body module and a base module, and the three split modules are in interference fit, so that the swab body 10 can be conveniently processed and formed, and in other alternative embodiments, the swab body 10 can be composed of other number of split modules, for example, two, four, and the swab body 10 can also be integrally formed.

The cleaning channel 13 comprises a first channel segment 131, a second channel segment 132 and a third channel segment 133 which are communicated with each other, the radial dimension of the first channel segment 131 is larger than that of the third channel segment 133, the radial dimension of the second channel segment 132 is gradually reduced from the first channel segment 131 to the third channel segment 133, the first channel segment 131 is communicated with the liquid outlet channel 12, the distance between the needle opening of the sampling needle and the liquid outlet channel 12 can be increased by the larger radial dimension of the first channel segment 131, and the influence on the sampling needle when the liquid outlet negative pressure is overlarge is relieved. The first channel segment 131 and the third channel segment 133 may be equal radial channels, that is, the inner diameters of the first channel segment 131 and the third channel segment 133 are not changed, the second channel segment 132 is a variable diameter channel, specifically, the inner wall of the second channel segment 132 may be in a shape of a circular truncated cone, so that the radial dimension of the second channel segment 132 is gradually reduced from the first channel segment 131 to the third channel segment 133, thus the slow acceleration and smooth flow of the cleaning fluid are facilitated, the cleaning of the circumference of the outer wall of the sampling needle and the drainage of the cleaning fluid are facilitated due to the larger radial dimension of the first channel segment 131, and the cleaning effect is improved. And the first passageway section 131 of major diameter can also play the effect of buffering flow, and the inner wall of sampling needle promotes through the syringe and also can washs, if do not have the too big and wash the flow undershoot with the inner wall of the washing flow that can cause the outer wall of buffer chamber of major diameter, can not reach flow balance, and the washing to the inner wall leads to the fact the influence.

In other alternative embodiments, the radial dimensions of the first, second and third channel segments may also be equal.

The liquid inlet channel 11 communicates with the third channel section 133 to allow cleaning liquid to enter the third channel section 133 from the liquid inlet channel 11, the liquid outlet channel 12 communicates with the first channel section 131, and the liquid outlet channel 12 is used for communicating with negative pressure to allow cleaning liquid in the cleaning channel 13 to exit the cleaning channel 13. The liquid inlet channel 11 can be communicated with a cleaning liquid barrel through a pipeline, cleaning liquid can be provided for the cleaning swab 100 through the cleaning liquid barrel, the cleaning liquid can flow into the third channel section 133 along the liquid inlet channel 11, the liquid outlet channel 12 is communicated with a power source and a waste liquid pool, and the power source is used for providing negative pressure so that waste liquid after cleaning the sampling needle flows out from the liquid outlet channel 12 to the waste liquid pool.

The cleaning swab 100 is used for cleaning a sampling needle, when the sampling needle is in a reset state, the needle tip of the sampling needle is in the second channel section 132, the reset state of the sampling needle can be considered that the sampling needle is in an initial state, for example, when the sampling needle needs to be cleaned, the needle tip of the sampling needle is initially positioned at a specific position of the cleaning channel 13 and cleaned at the specific position, and the specific position at the moment can be considered as the reset position of the sampling needle, and when the sampling needle is in the specific position, the sampling needle can be considered as the reset state; after the cleaning of the reset state is completed, the sampling needle can move along the cleaning channel 13, so that other positions of the sampling needle can be cleaned, and after the cleaning of the sampling needle is completed, the sampling needle can return to the reset position again, namely, the sampling needle returns to the reset state.

Through the above embodiment, when the sampling needle is in the reset state, the needle opening of the sampling needle is located in the second channel section 132, so that the sampling needle is far away from the liquid outlet channel 12, the situation that the sample in the sampling needle is sucked out due to the overlarge negative pressure of the liquid outlet channel 12 is relieved, and the sampling needle is located in the second channel section 132, the cleaning liquid can flow from the second channel section 132 to the first channel section 131, and then is discharged outwards from the liquid outlet channel 12, and the sampling needle can be fully cleaned in the process.

In some embodiments, the axis of the liquid outlet channel 12 is located at a side of the second channel section 132 remote from the third channel section 133. The axis of the liquid outlet channel 12 may be defined as an extension of the direction in which the washing liquid flows in the liquid outlet channel 12. In this embodiment, the axis of the liquid outlet channel 12 is above the second channel segment 132, so that the distance between the liquid outlet channel 12 and the second channel segment 132 is relatively long, which can further alleviate the situation that the sample in the sampling needle is sucked out due to the excessive negative pressure at the liquid outlet end. In other embodiments, the axis of the liquid outlet channel 12 may also be located on the side of the second channel segment 132 away from the first channel segment 131, as long as the condition that the sample in the sampling needle is not sucked out more is satisfied.

In some embodiments, the swab body 10 may further be provided with a liquid inlet 16 and a liquid outlet 17, the liquid inlet 16 is communicated with the liquid inlet channel 11, the liquid inlet 16 is used for being communicated with a cleaning liquid barrel, the cleaning liquid enters the liquid inlet channel 11 from the liquid inlet 16, the cleaning liquid is provided for the cleaning swab 100, the liquid outlet 17 is communicated with the liquid outlet channel 12, the liquid outlet 17 is used for being communicated with a power source and a waste liquid pool, the cleaning liquid is discharged out of the cleaning swab 100 under the action of negative pressure provided by the power source, in this embodiment, the liquid inlet 16 and the liquid outlet 17 can be arranged at intervals along the circumference of the cleaning channel 13, the liquid inlet 16 and the liquid outlet 17 are located on the same horizontal plane of the cleaning swab 100, and are on different sides of the cleaning swab 100, the liquid inlet channel 11 is communicated with the liquid inlet 16 and extends to the bottom of the swab body 10 to be communicated with the third channel section 133, the liquid inlet channel 11 can be parallel to the cleaning channel 13, and after the cleaning liquid flows to the third channel section 133, the cleaning liquid flows upwards in turn through the second channel section 132 and the first channel section 131, the cleaning liquid is enabled to flow upwards from the bottom of the cleaning channel 13, that is enabled to flow upwards, that is enabled to be influenced by the negative pressure, and the same time when the needle is greatly increased, and the sampling efficiency of the cleaning liquid is enabled to be more fully and the needle is enabled.

The flow rate of the cleaning liquid in the cleaning swab 100 is generally fixed, and the radial dimension of the liquid outlet 17 is set to be larger than the radial dimension of the liquid inlet 16 in order to ensure a smoother flow.

In some embodiments, the swab body 10 is provided with a first annular chamber 14, the first annular chamber 14 surrounds the first channel segment 131, the first annular chamber 14 may be coaxially disposed with the first channel segment 131, the first channel wall 1311 of the first channel segment 131 is provided with a channel hole 1314 communicating the first channel segment 131 with the first annular chamber 14, and the cleaning liquid may flow from the first channel segment 131 to the first annular chamber 14 through the channel hole 1314, and the first annular chamber 14 is communicated through the first channel hole 1314, so that the first channel wall 1311 is communicated with the liquid outlet channel 12 through the first annular chamber 14. Therefore, in this embodiment, through the first annular chamber 14 serving as the transition portion between the channel hole 1314 and the liquid outlet channel 12, part of the negative pressure can be offset by the first annular chamber 14, so as to reduce the magnitude of the negative pressure directly acting on the sampling needle, and further alleviate the situation that the sample in the sampling needle is sucked out due to the excessive negative pressure of the liquid outlet channel 12.

Further, the number of passage holes 1314 is plural, and a plurality of passage holes 1314 are provided around the second passage section 132. By arranging the plurality of channel holes 1314, the pressure of the cleaning liquid around the sampling needle can be more uniform, and the cleaning effect on the sampling needle is improved. In this embodiment, the number of the passage holes 1314 may be three, and the three passage holes 1314 may be equally spaced in the circumferential direction of the first passage wall 1311, and in other alternative embodiments, the passage holes 1314 may be provided in other suitable numbers, such as four or five, as needed.

In some embodiments, the orientation of the channel hole 1314 may be opposite to the liquid outlet channel 12, so that the effect of the negative pressure on the cleaning liquid may be more obvious, in other embodiments, the orientation of the channel hole 1314 may be staggered from the end of the liquid outlet channel 12 near the first annular chamber 14, i.e. the orientation of the channel hole 1314 may have a certain angle difference with respect to the liquid outlet channel 12, which may alleviate the sampling needle from being susceptible to the negative pressure, compared to the orientation of the channel hole 1314 opposite to the liquid outlet channel 12, and when the sampling needle is in the reset state, the orientation of the channel hole 1314 may be staggered from the needle opening of the sampling needle in the radial direction of the cleaning channel, which may also alleviate the sampling needle from being susceptible to the negative pressure.

Further, the first channel wall 1311 includes a first blocking wall 1312 and a second blocking wall 1313 connected to each other, the second blocking wall 1313 is closer to the second channel section 132 than the first blocking wall 1312, and the channel hole 1314 is provided on the first blocking wall 1312. The first blocking wall 1312 and the second blocking wall 1313 are disposed up and down, respectively, along the axial direction of the cleaning passage 13, and the first blocking wall 1312 and the second blocking wall 1313 may be coaxial with the cleaning passage 13. In this embodiment, the channel hole 1314 is disposed on the first baffle wall 1312, and the second baffle wall 1313 is closer to the second channel segment 132 than the first baffle wall 1312, so as to reduce the influence of negative pressure on the sampling needle, and alleviate the situation that the sample in the sampling needle is sucked out due to excessive negative pressure of the liquid outlet channel 12.

In this embodiment, the second blocking wall 1313 is annular and is disposed around the second channel section 132, when residual waste liquid stays in the second blocking wall 1313, the waste liquid will flow to the second channel section 132 under the action of gravity, the second channel section 132 is shaped like a funnel, so as to accelerate the downward flow of the residual waste liquid, prevent the residual waste liquid from staying in the second channel section 132 to pollute the sampling needle, or prevent the residual waste liquid which is not pumped in the liquid outlet channel 12 from flowing back to the cleaning channel 13 to pollute the sampling needle because the second blocking wall 1313 is not used for a long time to form waste liquid crystals. And the annular second blocking wall 1313 can enable the pressure of the cleaning liquid around the sampling needle to be more uniform, and the cleaning effect on the sampling needle is improved. In some embodiments, the second baffle 1313 may be in the shape of an arc, and the plurality of second baffles 1313 are spaced apart along the circumference of the first channel segment 131. In some embodiments, second baffle 1313 may be a ring-shaped structure formed by a plurality of arc-shaped plates being spliced, or second baffle 1313 may be a single body.

The swab body 10 is further provided with a fourth channel section 134 communicated with the third channel section 133, the radial dimension of the fourth channel section 134 is larger than that of the third channel section 133, and the inner wall of the joint of the fourth channel section 134 and the third channel section 133 is in a round table shape, so that the aperture of the joint of the channels is gradually decreased from the fourth channel section 134 to the third channel section 133, and cleaning liquid flows from the fourth channel section 134 to the third channel section 133, and the pressure of the cleaning liquid is increased due to the reduction of the aperture, thereby being beneficial to improving the cleaning effect.

The swab body 10 may further be provided with a second annular chamber 15, the second annular chamber 15 is disposed around the fourth channel section 134, the second annular chamber 15 and the fourth channel section 134 may be coaxially disposed, the second annular chamber 15 is communicated with the liquid inlet channel 11, and the cleaning liquid may fill the second annular chamber 15 and then continue to flow upwards along the fourth channel section 134, so that the negative pressure may not directly act on the cleaning liquid in the liquid inlet channel 11, and the service life of the power source for providing the negative pressure is prolonged.

In order to improve the cleaning efficiency of the sampling needle, a drainage groove 1342 may be provided to communicate the second annular chamber 15 and the fourth channel section 134, referring to fig. 4, fig. 4 is a schematic perspective view of the fourth channel section of the cleaning swab provided in the present application.

A drainage groove 1342 communicating the fourth channel section 134 and the second annular chamber 15 is provided in the second channel wall 1341 forming the fourth channel section 134, and an extension line of the drainage groove 1342 is tangential to the wall surface of the fourth channel section 134. The plurality of drainage grooves 1342 may be spiral when viewed along the axial direction perpendicular to the fourth channel section 134, so that the extension line of the drainage grooves 1342 is tangential to the wall surface of the fourth channel section 134, and the cleaning solution entering the fourth channel section 134 from the drainage grooves 1342 may cover the inner wall of the fourth channel section 134 more comprehensively, so that the cleaning solution flows more smoothly, in this embodiment, the number of drainage grooves 1342 may be three, and in other alternative embodiments, the drainage grooves 1342 may be other suitable number of drainage grooves 1342, for example, two, four, etc.

Through the above embodiment, when the sampling needle is in the reset state, the needle opening of the sampling needle is located in the second channel section 132, so that the sampling needle is far away from the liquid outlet channel 12, and the situation that the sample in the sampling needle is sucked out due to the overlarge negative pressure of the liquid outlet channel 12 can be relieved.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (10)

1. The cleaning swab is characterized by comprising a swab body, wherein the swab body is provided with a liquid inlet channel, a liquid outlet channel and a cleaning channel penetrating through the swab body, the cleaning channel comprises a first channel section, a second channel section and a third channel section which are communicated with each other, the liquid inlet channel is communicated with the third channel section so as to allow cleaning liquid to enter the third channel section from the liquid inlet channel, the liquid outlet channel is communicated with the first channel section, the liquid outlet channel is used for communicating negative pressure so as to allow the cleaning liquid in the cleaning channel to be discharged out of the cleaning channel, the cleaning swab is used for cleaning a sampling needle, and a needle opening of the sampling needle is positioned in the second channel section when the sampling needle is in a reset state.

2. The cleaning swab of claim 1, wherein the radial dimension of the first channel segment is greater than the radial dimension of the third channel segment, the radial dimension of the second channel segment gradually decreasing from the first channel segment to the third channel segment.

3. The cleaning swab of claim 1, wherein the swab body is provided with a first annular chamber, the first annular chamber surrounds the first channel section, a first channel wall of the first channel section is provided with channel holes for communicating the first channel section and the first annular chamber, the first annular chamber is communicated with the liquid outlet channel, the number of the channel holes is multiple, and a plurality of the channel holes are arranged around the second channel section.

4. The cleaning swab of claim 3, wherein the channel hole is offset from an end of the liquid outlet channel adjacent to the first annular chamber;

and/or, when the sampling needle is in a reset state, the channel hole and the needle opening of the sampling needle are staggered in the radial direction of the cleaning channel.

5. The cleaning swab of claim 3, wherein the first channel wall comprises a first baffle wall and a second baffle wall that are connected to each other, the second baffle wall being closer to the second channel section than the first baffle wall, the channel hole being provided in the first baffle wall.

6. The cleaning swab of claim 5, wherein the second baffle wall is annular and is disposed around the second channel segment.

7. The cleaning swab of claim 3, wherein the swab body is further provided with a fourth channel section in communication with the third channel section, the fourth channel section having a radial dimension greater than a radial dimension of the third channel section, the third channel section being in communication with the liquid inlet channel through the fourth channel section.

8. The cleaning swab of claim 7, wherein the swab body is further provided with a second annular chamber surrounding the fourth channel section, wherein the second annular chamber is communicated with the liquid inlet channel, wherein a second channel wall forming the fourth channel section is provided with a drainage groove communicating the fourth channel section and the second annular chamber, and wherein an extension line of the drainage groove is tangential to a wall surface of the fourth channel section.

9. The cleaning swab of claim 1, wherein the swab body is provided with a liquid inlet and a liquid outlet, wherein the liquid inlet is communicated with the liquid inlet channel, the liquid outlet is communicated with the liquid outlet channel, and the liquid inlet and the liquid outlet are arranged at intervals along the circumferential direction of the cleaning channel.

10. A sample analyzer comprising a cleaning swab according to any one of claims 1-9.