CN217505887U

CN217505887U - Sample analyzer

Info

Publication number: CN217505887U
Application number: CN202220747134.XU
Authority: CN
Inventors: 杨理想; 王伟; 郁琦
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-09-27
Anticipated expiration: 2032-03-31

Abstract

The embodiment of the application provides a sample analyzer, which comprises a containing device, a sample dispensing assembly and a detection device, wherein the top of the containing device is open, the bottom of the containing device is provided with a first interface for discharging liquid in the containing device, and the sample dispensing assembly comprises a sample needle for adding a sample into the containing device; the detection device is communicated with the first interface through a liquid discharge pipeline and is used for detecting liquid discharged through the first interface, and the projection of the liquid discharge axis of the sample when liquid is added to the accommodating device and the center of the first interface on the horizontal plane are not overlapped. When the sample is discharged to the containing device through the sample needle, the sample needle deviates from the position right above the first interface of the containing device. The sample discharged from the sample needle to the accommodating device can not directly drip to the first interface, so that bubbles can be prevented from being generated at the first interface, and the sample does not contain the bubbles or only contains a few bubbles when the sample is sucked from the first interface to the detection device, so that the interference of the bubbles on the detection result is reduced.

Description

Sample analyzer

Technical Field

The application relates to the technical field of medical equipment, in particular to a sample analyzer.

Background

The sample analyzer is used for detecting samples, for example, the electrolyte analyzer mainly detects and maintains the concentration of ions (mainly including Na +, K +, Cl-and the like) in human blood, and is indispensable in clinical examination.

When the sample cup is used as a container for bearing a sample, bubbles may be generated in the sample due to phenomena such as turbulence and the like when the sample is added into the sample cup, and the presence of the bubbles may interfere with the detection of the sample, so that the detection result is inaccurate.

SUMMERY OF THE UTILITY MODEL

The application provides a sample analyzer, and aims to solve the technical problem that when a sample is added into a sample cup, bubbles possibly generated in the sample cause inaccurate detection results and the like.

In a first aspect, an embodiment of the present application provides a sample analyzer, including:

the top of the accommodating device is provided with an opening, the bottom of the accommodating device is provided with a first interface, and the first interface is used for discharging liquid in the accommodating device;

a sample dispensing assembly comprising a sample needle for adding a sample into the containment device through the top opening;

the detection device is communicated with the first interface through a liquid discharge pipeline and is used for detecting the liquid discharged through the first interface, and the liquid discharge axis when the sample is added with liquid to the containing device is not overlapped with the projection of the center of the first interface on the horizontal plane.

The embodiment of the application provides a sample analyzer, which comprises a holding device, a sample dispensing assembly and a detection device, wherein the top of the holding device is opened, the bottom of the holding device is provided with a first interface for discharging liquid in the holding device, and the sample dispensing assembly comprises a sample needle for adding a sample into the holding device; the detection device is communicated with the first interface through a liquid discharge pipeline and is used for detecting liquid discharged through the first interface, and the projection of the liquid discharge axis of the sample when liquid is added to the accommodating device and the center of the first interface on the horizontal plane are not overlapped. When the sample is discharged to the containing device through the sample needle, the sample needle deviates from the position right above the first interface of the containing device. The sample discharged from the sample needle to the accommodating device can not directly drip to the first interface, so that bubbles can be prevented from being generated at the first interface, and the sample does not contain the bubbles or only contains a few bubbles when the sample is sucked from the first interface to the detection device, so that the interference of the bubbles on the detection result is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the embodiments of the present application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a sample analyzer provided in an embodiment of the present application;

FIG. 2 is a schematic block diagram of a sample analyzer in one embodiment;

FIG. 3 is a schematic block diagram of a sample analyzer in another embodiment;

FIG. 4 is a schematic diagram of the structure of a sample analyzer in one embodiment;

FIG. 5 is a schematic structural diagram of a receiving device according to an embodiment;

fig. 6 is a schematic view of the structure of a sample analyzer in another embodiment.

Description of reference numerals:

110. a housing device; 111. a first interface; 112. a second interface; 113. a third interface; 114. a liquid outlet; 115. a liquid discharge channel; 101. a flow guide surface; 120. a sample dispensing assembly; 121. a sample needle; 130. a detection device; 131. a liquid discharge conduit; 140. a first power plant; 150. a reagent containment assembly; 160. a second power plant; 170. a third power plant;

10. a functional module; 11. a sample part; 12. a sample dispensing mechanism; 13. a reagent component; 14. a reagent dispensing mechanism; 15. a blending mechanism; 16. a reaction member; 17. a light measuring member; 20. an input module; 30. a display module; 40. a memory; 50. a processor; 60. and an alarm module.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments and features of the embodiments described below can be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a sample analyzer according to an embodiment of the present disclosure.

In some embodiments, the sample analyzer includes, but is not limited to, at least one of: electrolyte analyzer, biochemical analyzer, immunity analyzer, blood coagulation analyzer, urine analyzer. The electrolyte analyzer is, for example, an ISE (Ion Selective Electrode) analyzer.

Illustratively, the sample analyzer is an ISE analysis module in a biochemical analyzer, which may further comprise at least one of an immunoassay module, a coagulation analysis module, a urine analysis module, and the like.

Before explaining the present invention in detail, a description will be given of the structure of a sample analyzer in some embodiments.

Referring to fig. 2, one embodiment discloses a sample analyzer, which includes at least one functional module 10 (or one or more functional modules 10), an input module 20, a display module 30, a memory 40, a processor 50, and an alarm module 60, which are described below.

Each functional module 10 is used for performing at least one function required in the sample analysis process, and the functional modules 10 cooperate together to perform the sample analysis to obtain the result of the sample analysis. Referring to fig. 3, a sample analyzer according to an embodiment is shown, in which some examples are given to the functional module 10. For example, the functional module 10 may include a sample cell 11, a sample dispensing mechanism 12, a reagent cell 13, a reagent dispensing mechanism 14, a kneading mechanism 15, a reaction cell 16, an optical measurement cell 17, and the like.

The sample block 11 is used to carry a sample. In some examples, the Sample unit 11 may include a Sample Delivery Module (SDM) and a front end rail; in other examples, the sample section 10 may be a sample disk including a plurality of sample sites on which sample tubes, for example, can be placed, and the sample disk may be configured to rotate to dispatch the sample to a corresponding position, for example, a position where the sample is aspirated by the sample pipetting mechanism 12.

The sample dispensing mechanism 12 is used for sucking a sample and discharging the sample into a reaction cup to be loaded. For example, the sample dispensing mechanism 12 may include a sample needle that performs a two-dimensional or three-dimensional motion in space by a two-dimensional or three-dimensional driving mechanism, so that the sample needle can move to aspirate a sample carried by the sample member 11 and to a cuvette to be loaded and discharge the sample to the cuvette.

The reagent component 13 is used to carry reagents. In one embodiment, the reagent unit 13 may be a reagent disk, which is configured in a disk-shaped structure and has a plurality of positions for holding reagent containers, and the reagent unit 13 can rotate and drive the reagent containers held by the reagent unit to rotate to a specific position, for example, a position for sucking reagent by the reagent dispensing mechanism 14. The number of the reagent member 13 may be one or more.

The reagent dispensing mechanism 14 is used to suck a reagent and discharge it into a reaction cuvette to which the reagent is to be added. In one embodiment, the reagent dispensing mechanism 14 may include a reagent needle that performs a two-dimensional or three-dimensional motion in space by a two-dimensional or three-dimensional driving mechanism, so that the reagent needle can move to aspirate a reagent carried by the reagent unit 13 and to a cuvette to which the reagent is to be added and discharge the reagent to the cuvette.

The mixing mechanism 15 is used for mixing the reaction liquid to be mixed in the reaction cup. The number of the kneading mechanisms 15 may be one or more.

The reaction unit 16 has at least one placement site for placing a cuvette and incubating a reaction solution in the cuvette. For example, the reaction component 16 may be a reaction tray, which is configured in a disc-shaped structure and has one or more placing positions for placing reaction cups, and the reaction tray can rotate and drive the reaction cups in the placing positions to rotate for scheduling the reaction cups in the reaction tray and incubating reaction liquid in the reaction cups.

The photometric unit 17 is used to perform photometric measurement on the reaction solution after completion of incubation, and to obtain reaction data of the sample. For example, the photodetector 17 detects the light emission intensity of the reaction solution to be measured, and calculates the concentration of the component to be measured in the sample from the calibration curve. In one embodiment, the photometric component 17 is separately disposed outside the reaction component 16.

While the above is some examples of the functional module 10, the following continues with a description of other components and structures in the sample analyzer.

The input module 20 is used for receiving input of a user. The input module 20 may be a mouse, a keyboard, or the like, as is common, and in some cases, may be a touch-sensitive display screen that provides a function for a user to input and display content, and thus in this example, the input module 20 and the display module 30 are integrated. Of course, in some instances, the input module 20 may even be a voice input device or the like that facilitates recognizing speech.

The display module 30 may be used to display information. In some embodiments, the sample analyzer itself may be integrated with the display module, and in some embodiments, the sample analyzer may also be connected to a computer device (e.g., a computer) to display information through a display unit (e.g., a display screen) of the computer device, which are all within the scope of the present disclosure as defined and protected by the display module 30.

For convenience of explanation, the following description will be made mainly taking a sample analyzer as an electrolyte analyzer, such as an ISE analyzer, as an example. Compared with other ion detection devices, such as an atomic absorption spectrophotometer, an ICP (Inductively Coupled Plasma) mass spectrometer, an ion chromatograph and the like, the electrolyte analysis instrument has the advantages of high precision, good accuracy, high speed, simple operation and the like.

As shown in fig. 1, the sample analyzer includes a housing device 110, a sample dispensing assembly 120, and a detection device 130. Wherein the sample dispensing assembly 120 may also be referred to as a sample dispensing mechanism.

The top of the accommodating device 110 is open, and the bottom of the accommodating device 110 is provided with a first interface 111, and the first interface 111 is used for discharging the liquid in the accommodating device 110.

The sample dispensing assembly 120 is used to add a sample to the holding device 110. For example, the sample dispensing module 120 may be used to add a serum sample into the accommodating device 110, but is not limited thereto, and may be, for example, whole blood, plasma, urine, dialysate, or hydration solution.

Specifically, the sample dispensing assembly 120 includes a sample needle 121, and the sample needle 121 is used for adding a sample into the holding device 110 through the top opening. For example, the sample dispensing assembly 120 further includes a driving device for driving the sample needle 121 to move between the sample container 110 and the container 110, the sample needle 121 descends and sucks the sample in the sample container 110 when moving above the sample container 110, and the sucked sample is added to the container 110 when moving above the container 110.

The detection device 130 is in communication with the first port 111 via a drainage conduit 131, and the detection device 130 is configured to detect the liquid drained through the first port 111.

Illustratively, the detection device 130 is an electrolyte detection device 130, for example, the detection device 130 includes detection electrodes, such as an indicator electrode and a reference electrode. When the liquid in the containing device 110 is an electrolyte containing ions, such as a serum sample, when flowing through the detecting device 130, an electrode potential difference, i.e. a potential, is formed between the indicator electrode and the reference electrode of the detecting device 130, and the ion concentration of the sample can be determined according to the detected potential of the sample. Alternatively, the ion concentration of the sample may be determined from the potential of the detected sample and the potential of a reagent of known ion concentration, which may be referred to as direct method; or the sample is a sample diluted by a diluent, and the ion concentration of the sample before dilution is determined according to the potential of the diluted sample and the potential of the diluent, which can be called indirect method.

Optionally, the indicating electrode is an ion selective electrode, and the concentrations of different ions, such as potassium ions, sodium ions, and chloride ions, can be measured by different ion selective electrodes.

The liquid discharge axis of the sample needle 121 of the sample dispensing assembly 120 when filling the container 110 does not overlap with the projection of the center of the first port 111 on the horizontal plane. For example, when the sample needle 121 discharges to the accommodating device 110, the sample needle 121 is offset from the first port 111 of the accommodating device 110. The sample discharged from the sample needle 121 to the accommodating device 110 does not directly drip on the first interface 111, which can prevent the generation of bubbles at the first interface 111, and the sample does not contain bubbles or contains fewer bubbles when the sample is sucked from the first interface 111 to the detection device 130, thereby reducing the interference of bubbles on the detection result.

In some embodiments, as shown in fig. 4, a guide surface 101 is formed on a sidewall of the container 110, and the sample dispensed from the sample dispensing assembly 120 flows along the guide surface 101 toward a bottom of the container 110.

When the sample needle 121 adds a sample to the accommodating device 110 directly above the first interface 111, the sample flows along the diversion surface 101 toward the bottom of the accommodating device 110. The sample is guided by the guiding surface 101, so that bubbles generated by turbulent flow when the liquid is directly injected into the bottom of the accommodating device 110 can be prevented.

Illustratively, as shown in fig. 4, the lower edge of the diversion surface 101 extends to the bottom of the accommodating device 110. The liquid discharged from the sample dispensing assembly 120 can slide down to the bottom of the container 110 through the guide surface 101, thereby preventing bubbles from being generated at the bottom of the container 110.

In some embodiments, as shown in fig. 4, the sample analyzer further includes a first power device 140, and the first power device 140 is in communication with the first interface 111 and the detection device 130 through a drainage pipe 131, so that the liquid in the accommodating device 110 is drained from the first interface 111 by the first power device 140 to flow through the detection device 130 for detection.

In some embodiments, as shown in fig. 5 and 6, the receiving device 110 is further provided with a second interface 112, and the sample analysis further comprises a reagent holding assembly 150 and a second power device 160, so that the first reagent in the reagent holding assembly 150 is injected into the receiving device 110 from the second interface 112 under the action of the second power device 160.

Illustratively, the reagent holding assembly 150 is provided with a holding portion for holding a reagent container, and optionally, the reagent container is replaceable.

As shown in fig. 6, the second interface 112 is connected to a second power unit 160 through a connecting line, and the second power unit 160 includes, for example, a liquid pump. The second power unit 160 is used to inject the first reagent in the reagent holding assembly 150 into the holding device 110 through the second port 112.

Illustratively, the first reagent can be used for cleaning the housing device 110, the testing device 130, and/or for calibration of the testing device 130. For example, the first reagent includes an internal standard solution, a cleaning solution, a diluent, a reference solution, and the like, but is not limited thereto.

Illustratively, the sample analyzer is an electrolyte analyzer and/or the detection device 130 is an electrolyte detection device 130, and the first reagent may be referred to as an a standard solution.

In some embodiments, after the sample in the receptacle 110 is tested, the first power device 140 discharges the remaining sample in the receptacle 110; the second power device 160 injects the first reagent in the reagent containing assembly 150 into the containing device 110 through the second interface 112, and the first power device 140 discharges the first reagent in the containing device 110, so that the containing device 110 and the detecting device 130 can be washed. The sample dispensing assembly 120 may add a new sample to the containment device 110 after the flush.

For example, when the second power device 160 injects the first reagent in the reagent containing assembly 150 into the accommodating device 110 through the second interface 112, and the first power device 140 discharges the first reagent in the accommodating device 110 to wash the accommodating device 110 and the detection device 130, the rotation speed of the second power device 160 is less than or equal to the rotation speed of the first power device 140. When the flow rate of the first reagent discharged from the accommodating device 110 by the first power device 140 is greater than the flow rate of the first reagent injected into the accommodating device 110 by the second power device 160, the first power device 140 may suck a portion of air through the first interface 111, and form a gas-liquid mixture with the sucked first reagent, and the gas-liquid mixture may rapidly pass through the liquid discharge pipeline connected to the first interface 111, the first power device 140 and the detection device 130, so that the liquid discharge pipeline, the first power device 140 and the detection device 130 may be washed with high efficiency to reduce the residue of the sample therein.

Illustratively, as shown in fig. 5, the height of the second interface 112 above the accommodating device 110 is higher than or equal to that of the first interface 111. Contamination of the first reagent of the second interface 112 by the sample may be prevented or mitigated.

Alternatively, the second power device 160 may suck a part of the sample in the housing apparatus 110 through the second interface 112, and after the second power device 160 sucks a part of the sample in the housing apparatus 110 through the second interface 112, the first power device 140 discharges the remaining sample in the housing apparatus 110 through the first interface 111 to flow through the detection apparatus 130 for detection. The second interface 112 is higher than the first interface 111, so that when the second power device 160 sucks part of the sample in the containing device 110 through the second interface 112, liquid containing bubbles on the sample can be sucked; the sample remaining in the holding device 110 contains no bubbles or only a few bubbles, and the interference of bubbles on the detection can be reduced or eliminated.

Optionally, as shown in fig. 5 and fig. 6, the accommodating device 110 is further provided with a third interface 113, where the third interface 113 is used for injecting a second reagent, and the second reagent is different from the first reagent.

Illustratively, the ion concentration of the second reagent is lower than the ion concentration of the first reagent; for example, the second reagent and the first reagent are standard solutions with known concentrations. Optionally, the sample analyzer is an electrolyte analyzer and/or the detection device 130 is an electrolyte detection device 130, the first reagent may be referred to as an a standard solution, and the second reagent may be referred to as a B standard solution.

Illustratively, the sample analyzer is an electrolyte analyzer and/or the detection device 130 is an electrolyte detection device 130, and the ion concentration of the second reagent is lower than the ion concentration of the first reagent.

As shown in fig. 6, the sample analyzer further comprises a third power device 170, wherein the third power device 170 is used for injecting the second reagent in the reagent-containing assembly 150 into the accommodating device 110 through the third interface 113.

In some embodiments, the third power device 170 can inject the first reagent in the reagent holding assembly 150 into the holding device 110 through the second interface 112, and the first power device 140 can discharge the first reagent in the holding device 110 through the detecting device 130 to obtain a detection result of the first reagent; the third power device 170 can inject the second reagent in the reagent holding assembly 150 into the accommodating device 110 through the third interface 113, and the first power device 140 can discharge the second reagent in the accommodating device 110 to flow through the detecting device 130, so as to obtain a detection result of the second reagent; the detection result of the first reagent and the detection result of the second reagent may be used to adjust the electrode slope of the detection device 130.

Illustratively, the result of the detection of the first reagent by detection device 130 comprises a first potential of the detected first reagent, and the result of the detection of the second reagent by detection device 130 comprises a second potential of the detected second reagent; the ion concentration and the first potential of the first reagent and the ion concentration and the second potential of the second reagent may be used to adjust the slope of the electrodes of the detection device 130, for example, to adjust the slope of a curve of ion concentration versus potential. Based on adjusting the slope of the ion concentration versus potential curve, the ion concentration in the sample may be determined from the third potential of the sample resulting from the detection of the sample by the detection device 130.

In some embodiments, as shown in fig. 5 and 6, the third interface 113 has a height above the receiving device 110 that is higher than or equal to the second interface 112. Contamination of the third port 113 during use of the first reagent can be prevented. Illustratively, the height of the third interface 113 on the accommodating device 110 is higher than the liquid level of the first reagent when the first reagent is injected into the accommodating device 110.

Illustratively, the first reagent is used more frequently than the second reagent, e.g., in a single point calibration during a test, such as a serum or urine test, the first reagent is used; by setting the height of the second port 112 of the first reagent higher than the third port 113 of the second reagent, cross-contamination of the third port 113 during use of the first reagent can be prevented.

In some embodiments, as shown in fig. 5, the bottom wall of the accommodating cavity formed by the accommodating device 110 is provided with an outlet 114, the sample analyzer further includes a drainage channel 115 penetrating the bottom of the accommodating device 110 and communicating with the outlet 114, the second port 112 is disposed on a side wall of the drainage channel 115, and the first port 111 is disposed on the side wall of the drainage channel 115 or a bottom end of the drainage channel 115 is used as the first port 111. When the sample is injected into the containing cavity formed by the containing device 110, there is a possibility that bubbles will be generated at the bottom wall of the containing cavity, the second power device 160 sucks part of the sample containing bubbles through the second interface 112 and the liquid discharge channel 115, and then the sample discharged from the containing device 110 to the detection device 130 by the first power device 140 through the first interface 111 contains no bubbles or only a few bubbles, so as to reduce or eliminate the interference of the bubbles on the detection sample by the detection device 130.

Illustratively, as shown in fig. 4 and 5, the sidewall of the accommodating device 110 is formed with a flow guiding surface 101. When the sample is added to the accommodating device 110 by the sample dispensing assembly 120, the added sample may flow toward the bottom wall of the accommodating cavity along the flow guide surface 101 of the side wall, for example, the sample may be guided by the flow guide surface 101 of the cone-shaped part, so as to prevent bubbles from being generated due to turbulent flow when the liquid is directly injected into the bottom of the accommodating device 110.

Optionally, a volume of the accommodating device 110 corresponding to the diversion plane 101 below the third interface 113 is greater than or equal to a maximum volume of the sample when the accommodating device 110 injects the sample, so as to prevent the third interface 113 from being contaminated by the sample.

Optionally, a volume of the accommodating device 110 corresponding to the diversion plane 101 below the third port 113 is greater than or equal to a maximum volume of the first reagent when the accommodating device 110 injects the first reagent, so as to prevent the third port 113 from being contaminated by the first reagent.

Optionally, the roughness of the flow guide surface 101 is less than or equal to ra0.1, so as to reduce the residual amount of the sample and reduce cross contamination.

Referring to fig. 5, the guiding surface 101 and the side wall of the liquid discharging channel 115 are in a round transition, for example, the receiving device 110 is in a round transition from R3 at the boundary between the cone wall and the vertical wall, so that the liquid on the guiding surface 101 slides down to the liquid discharging channel 115, and the liquid is prevented from collecting between the guiding surface 101 and the side wall of the liquid discharging channel 115 to generate bubbles.

The sample analyzer comprises an accommodating device, a sample dispensing assembly and a detection device, wherein the top of the accommodating device is provided with an opening, the bottom of the accommodating device is provided with a first interface, and the first interface is used for discharging liquid in the accommodating device; the sample dispensing assembly comprises a sample needle for adding a sample into the holding device through the top opening; the detection device is communicated with the first interface through a liquid discharge pipeline and is used for detecting liquid discharged through the first interface, and the projection of the liquid discharge axis of the sample when liquid is added to the accommodating device and the center of the first interface on the horizontal plane are not overlapped. When the sample is discharged to the containing device through the sample needle, the sample needle deviates from the position right above the first interface of the containing device. The sample discharged from the sample needle to the accommodating device can not directly drip to the first interface, so that bubbles can be prevented from being generated at the first interface, and the sample does not contain the bubbles or only contains a few bubbles when the sample is sucked from the first interface to the detection device, so that the interference of the bubbles on the detection result is reduced.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It should also be understood that the term "and/or" as used in this application and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A sample analyzer, comprising:

2. The sample analyzer of claim 1, further comprising a first powered device in communication with the first port and the detection device via the drain conduit, such that the first powered device drains the liquid in the receptacle through the first port to flow through the detection device for detection.

3. The sample analyzer of claim 1 wherein the receptacle is further provided with a second interface, and the sample analyzer further comprises a reagent holding assembly and a second power device, such that the first reagent in the reagent holding assembly is injected into the receptacle from the second interface by the second power device.

4. The sample analyzer of claim 3, wherein the second interface has a height above the receptacle that is greater than or equal to the first interface.

5. The sample analyzer of claim 3, wherein the housing means is further provided with a third interface, and the third interface is higher than or equal to the second interface on the housing means;

the sample analyzer also includes a third motive apparatus for injecting a second reagent in the reagent containment assembly into the containment device through the third interface, the second reagent being different from the first reagent.

6. The sample analyzer of claim 5, wherein the sample analyzer is an electrolyte analyzer and/or the detection device is an electrolyte detection device, and the ion concentration of the second reagent is lower than the ion concentration of the first reagent.

7. The sample analyzer as claimed in any one of claims 3 to 6, wherein the bottom wall of the receiving cavity formed by the receiving device is provided with a liquid outlet, the sample analyzer further comprises a liquid discharge channel penetrating the bottom of the receiving device and communicating with the liquid outlet, the second port is arranged on a side wall of the liquid discharge channel, and the first port is arranged on a side wall of the liquid discharge channel or a bottom end of the liquid discharge channel is used as the first port.

8. The sample analyzer of claim 7, wherein the side wall of the receptacle is formed with a flow guide surface, and the flow guide surface is in rounded transition with the side wall of the liquid discharge channel.

9. The sample analyzer of any of claims 1-6 wherein the sidewall of the receptacle is formed with a flow guide surface along which the sample dispensed from the sample dispensing assembly flows toward the bottom of the receptacle.

10. The sample analyzer of claim 9 wherein a lower edge of the deflector surface extends to a bottom of the receptacle.