CN114113566A - Method for detecting clogging of sampling needle, blood analyzer, and computer storage medium - Google Patents
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- 238000005070 sampling Methods 0.000 title claims abstract description 158
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000008280 blood Substances 0.000 title description 11
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- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000004159 blood analysis Methods 0.000 claims abstract description 36
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- 238000012360 testing method Methods 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 2
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- 210000003296 saliva Anatomy 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- G—PHYSICS
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The application discloses a sampling needle blockage detection method, a blood analysis device and a computer storage medium. The method comprises the following steps: when the sampling needle finishes sucking samples, acquiring a first pressure value in a liquid path connected with the sampling needle; after the sampling needle stops sucking the sample, acquiring a second pressure value in the liquid path; calculating a difference value between the first pressure value and the second pressure value to obtain a third pressure value; and determining the blockage condition of the sampling needle by using the third pressure value. By the aid of the method, accuracy of sampling needle blockage detection can be improved.
Description
Technical Field
The present invention relates to the field of sampling needle blockage detection technologies, and in particular, to a sampling needle blockage detection method, a blood analysis device, and a computer storage medium.
Background
The clinical testing instrument usually involves sampling a sample to be tested from a sample tube by using a sampling needle, and then sucking the sample into the sampling needle and putting the sample into a testing reaction ring. The sample to be detected adopted by the clinical detection instrument comprises various liquids such as blood, urine, spinal fluid, saliva and the like, wherein the blood sample is most widely used. During the process of sampling blood samples by the sampling needle, abnormal sampling conditions, such as blockage of the sampling needle, may occur. Therefore, whether the sampling needle is abnormal or not is the key for ensuring normal sampling in clinical detection, and is the premise for ensuring that the clinical detection obtains a correct detection result.
The sampling needle is blocked, so that the sampling of the blood sample in clinical detection is wrong. In the prior art, a pressure sensor is usually adopted to detect a pressure signal of a sampling needle in a liquid path, and whether the sampling needle is blocked or not is judged. However, in practical application, the liquid path generates background noise to the pressure sensor, so that a sampling needle pressure signal detected by the pressure sensor has deviation, and the accuracy of detecting the blockage of the sampling needle is influenced.
Disclosure of Invention
The technical problem that this application mainly solved provides a jam detection method, blood analytical equipment and computer storage medium of sampling needle, can improve the accuracy that sampling needle jam detected.
In order to solve the technical problem, the application adopts a technical scheme that: a method of occlusion detection of a sampling needle is provided, the method comprising:
when the sampling needle finishes sample suction, acquiring a first pressure value in a liquid path connected with the sampling needle;
after the sampling needle stops sucking the sample, acquiring a second pressure value in the liquid path;
calculating a difference value between the first pressure value and the second pressure value to obtain a third pressure value;
and determining the blockage condition of the sampling needle by using the third pressure value.
According to an embodiment provided by the present application, acquiring a first pressure value in a fluid path connected to a sampling needle when the sampling needle finishes aspirating a sample includes:
when a sample sucking ending signal is acquired, sending a first acquisition instruction to a pressure sensor in a liquid path connected with the sampling needle so that the pressure sensor acquires a first pressure value and acquires the first pressure value sent by the pressure sensor; and the sample sucking ending signal is generated by a driving motor of the sampling needle after the sampling needle is controlled to finish the sample sucking.
According to an embodiment provided by the present application, the obtaining a second pressure value in the liquid path after the sampling needle stops sucking the sample includes:
and after a first time period of the sample suction ending signal is acquired, sending a second acquisition instruction to the pressure sensor so that the pressure sensor acquires a second pressure value, and acquiring the second pressure value sent by the pressure sensor.
According to an embodiment provided by the present application, the sending a second collecting instruction to the pressure sensor to make the pressure sensor collect a second pressure value, and acquiring the second pressure value sent by the pressure sensor includes:
sending a plurality of second acquisition instructions to the pressure sensor by taking a second time period as a time interval so as to enable the pressure sensor to acquire a plurality of pressure signals and obtain a plurality of pressure signals sent by the pressure sensor;
calculating an average value of the plurality of pressure signals as the second pressure value.
According to an embodiment of the present disclosure, the first time period is greater than the second time period.
According to an embodiment provided herein, the first time period is greater than 50 ms; and/or
The second time period is 1-10 ms.
According to an embodiment provided by the present application, the determining the occlusion condition of the sampling needle by using the third pressure value includes:
judging whether the third pressure value is smaller than a set threshold value or not;
and if so, determining that the sampling needle is blocked.
According to an embodiment provided by the present application, the method further includes:
and when the sampling needle is determined to be blocked, giving an alarm.
In order to solve the technical problem, the present application provides a blood analysis device, which includes a processor, and a memory, a sensor and a driving motor connected to the processor, wherein the driving motor is connected to a sampling needle to control the sampling needle to perform a sample sucking operation;
wherein the memory stores program data, and the processor is configured to execute the program data to implement any one of the above methods for detecting clogging of a sampling needle.
To solve the above technical problem, the present application further provides a computer storage medium for storing program data, which when executed by a processor, is used to implement the method for detecting clogging of a sampling needle according to any one of the above.
When the sampling needle finishes sample suction, a first pressure value in a liquid path connected with the sampling needle is obtained; after the sampling needle stops sucking the sample, acquiring a second pressure value in the liquid path; calculating a difference value between the first pressure value and the second pressure value to obtain a third pressure value; and determining the blockage condition of the sampling needle by using the third pressure value. According to the blockage detection method of the sampling needle, the first pressure value when the sampling needle finishes sample suction and the second pressure value after sample suction is stopped are obtained, the third pressure value of the liquid path connected with the sampling needle is obtained by utilizing the difference value of the second pressure value and the first pressure value, the blockage condition of the sampling needle is obtained according to the third pressure value, the influence of the liquid path on a pressure signal is avoided, and the blockage detection accuracy of the sampling needle is improved.
Drawings
FIG. 1 is a schematic flow chart diagram of a first embodiment of a method for detecting clogging of a sampling needle provided herein;
FIG. 2 is a schematic flow chart diagram illustrating a second embodiment of a method for detecting occlusion of a sampling needle provided herein;
FIG. 3 is a schematic view showing a simplified structure of a blood analyzer according to the method for detecting clogging of a sampling needle of the present application;
FIG. 4 is a block diagram of an embodiment of a blood analysis device provided herein;
FIG. 5 is a schematic structural diagram of an embodiment of a computer storage medium provided in the present application.
Detailed Description
The following describes in detail the embodiments of the present application with reference to the drawings attached hereto.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, interfaces, techniques, etc. in order to provide a thorough understanding of the present application.
The terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship. Further, the term "plurality" herein means two or more than two.
The application provides a blockage detection method for a sampling needle, which can be applied to the extraction of a blood sample for sampling, and the blockage detection method for the sampling needle can improve the blockage detection accuracy of the sampling needle, and specifically refer to fig. 1, wherein fig. 1 is a schematic flow diagram of a first embodiment of the blockage detection method for the sampling needle provided by the application. The method for detecting clogging of a sampling needle according to the present embodiment is applicable to a blood analyzer and also to a server having data processing capability. The method for detecting the blockage of the sampling needle in the embodiment specifically comprises the following steps:
s101: and when the sampling needle finishes sucking the sample, acquiring a first pressure value in a liquid path connected with the sampling needle.
In this embodiment, in order to ensure the accuracy of the clinical detection result, after the tester completes the extraction process of the relevant blood sample, the first pressure value at the end of the sample suction of the sampling needle needs to be determined by obtaining the pressure value in the liquid path connected to the sampling needle.
The pressure waveform of the sampling needle in the sample suction process and the pressure waveform of the sampling needle at the end of sample suction are less in change, and the pressure waveform of the sampling needle at the end of sample suction and the pressure waveform of the sampling needle after the sample suction is stopped are more in change. That is, there is a sudden change in the pressure waveform after the sampling is stopped, compared to the pressure waveform when the sampling needle finishes the sampling. And the sampling needle is at high level during the sample sucking process and at the end of the sample sucking, and the sampling needle is at low level after the sample sucking is stopped.
Further, the present embodiment may obtain the pressure value of the liquid path connected to the sampling needle by providing a pressure sensor in the liquid path connected to the sampling needle. The pressure value acquiring device is not limited in this embodiment. The pressure sensor can be arranged at any position in a liquid path connected with the sampling needle, so that the pressure sensor can conveniently acquire the pressure value in the liquid path.
The sampling needle of the present embodiment may also be used to extract various liquids such as urine samples, spinal fluid samples, and saliva samples.
S102: and after the sampling needle stops sucking the sample, acquiring a second pressure value in the liquid path.
Because the pressure waveform of the sampling needle after finishing the sample suction and the pressure waveform after stopping the sample suction have sudden changes, the embodiment can obtain the second pressure value in the liquid path by obtaining the pressure signal in the liquid path after the sample suction of the sampling needle is stopped. And the second pressure value comprises a noise pressure value.
Specifically, the blood analysis device of the present embodiment may acquire the second pressure value in the fluid path after the sampling needle stops aspirating the sample.
S103: and calculating the difference value between the first pressure value and the second pressure value to obtain a third pressure value.
In order to avoid that the accuracy of the clinical test result is low due to the local noise voltage value existing in the third pressure value obtained by the blood analysis device, the blood analysis device of the embodiment obtains the third pressure value of the fluid path by using the difference value between the second pressure value and the first pressure value.
S104: and determining the blockage condition of the sampling needle by using the third pressure value.
And determining the blockage condition of the sampling needle based on the third pressure value of the liquid path acquired in the step S103.
Specifically, the blood analysis device can judge whether the third pressure value of the liquid path is within a set threshold range, if the third pressure value of the liquid path is within the set threshold range, the sampling needle is not blocked, and the clinical detection result of the blood analysis device on the sample is accurate; if the third pressure value of the liquid path is not in the set threshold range, the sampling needle is blocked, and the clinical detection result of the blood analysis device on the sample has a large error. The blood analysis device can also set a set threshold value of the pressure value, judge whether the third pressure value of the liquid path is smaller than the set threshold value, if so, determine that the sampling needle is blocked, and the blood analysis device has a large error on the clinical detection result of the sample; if not, the sampling needle is not blocked, and the clinical detection result of the blood analysis device on the sample is accurate.
The blood analysis apparatus of the present embodiment may use an average value of the results of a plurality of clinical tests as a set threshold; or the range of the test result with high accuracy in the multiple clinical test results is used as the set threshold range, which is not limited in this embodiment.
In the scheme, when the sampling needle finishes sample suction, a first pressure value in a liquid path connected with the sampling needle is obtained; after the sampling needle stops sucking the sample, acquiring a second pressure value in the liquid path; calculating a difference value between the first pressure value and the second pressure value to obtain a third pressure value; and determining the blockage condition of the sampling needle by using the third pressure value. According to the blockage detection method of the sampling needle, the difference value between the second pressure value and the first pressure value is calculated by obtaining the first pressure value when the sampling needle finishes sample suction and the second pressure value after sample suction is stopped, the third pressure value of the liquid path connected with the sampling needle is obtained, the blockage condition of the sampling needle is known according to the third pressure value, the influence of the liquid path on a pressure signal is avoided, and the blockage detection accuracy of the sampling needle is improved.
With reference to fig. 2 and fig. 3, fig. 2 is a schematic flow chart of a second embodiment of the method for detecting occlusion of a sampling needle according to the present application, and fig. 3 is a schematic structural diagram of a blood analysis device in the method for detecting occlusion of a sampling needle according to the present application. The embodiment improves the accuracy of the sampling needle blockage detection. The method of the embodiment of the disclosure specifically comprises the following steps:
s201: when a sample sucking ending signal is acquired, a first acquisition instruction is sent to a pressure sensor in a liquid path connected with the sampling needle, so that the pressure sensor acquires a first pressure value, and the first pressure value sent by the pressure sensor is acquired.
In order to timely acquire the pressure value when the sample suction of the sampling needle is finished, and avoid that the first pressure value acquired by the pressure sensor has a deviation due to a sudden change between the pressure signal waveform when the sample suction of the sampling needle is finished and the pressure signal waveform after the sample suction is stopped, the blood analysis device of the embodiment acquires the first pressure value in the liquid path connected with the sampling needle when the sample suction finishing signal is acquired.
Specifically, the driving motor in the blood analysis device of this embodiment controls the sampling needle to take a sample, so that the driving motor generates a sample end signal when the sampling needle finishes taking a sample, the blood analysis device receives the sample end signal sent by the driving motor, and sends a first collection instruction to the pressure sensor in the fluid path connected to the sampling needle, so that the pressure sensor collects a first pressure value in the fluid path after receiving the first collection instruction, and the blood analysis device receives the first pressure value sent by the pressure sensor.
And the sample suction ending signal is generated by a driving motor of the sampling needle after the sample suction of the sampling needle is controlled.
S202: and sending a plurality of second acquisition instructions to the pressure sensor by taking the second time period as a time interval so as to enable the pressure sensor to acquire a plurality of pressure signals and acquire the plurality of pressure signals sent by the pressure sensor.
Because the sampling needle stops inhaling the appearance after, the pressure waveform in the liquid way that is connected with the sampling needle needs first time quantum just can reduce the pressure waveform of inhaling the appearance process to the pressure waveform that stops inhaling the appearance, in order to avoid the sampling needle to obtain the pressure value and regard as the second pressure value and influence the accuracy that sampling needle jam detected in ending the first time quantum of inhaling the appearance signal, the blood analysis device of this embodiment obtains the second pressure value in the liquid way after obtaining and ending the signal of inhaling the appearance, with the difference of calculating first pressure value and second pressure value, obtain the third pressure value.
The blood analysis device of the present embodiment sends a plurality of second collection commands to the pressure sensor after obtaining the sample suction end signal for the first time period, so that the pressure sensor collects a plurality of pressure signals, and the blood analysis device obtains a plurality of pressure signals sent by the pressure sensor. That is to say, the blood analysis device sends the second acquisition instruction to the pressure sensor every second time period after the first time period of the sample sucking signal is acquired, so that the pressure sensor can receive the second acquisition instruction every second time period, the pressure sensor acquires the pressure signal in the liquid path and sends the pressure signal to the blood analysis device, and the blood analysis device acquires a plurality of pressure signals.
It should be noted that the first time period and the second time period are time intervals, and the first time period is different from the second time period. In a specific embodiment, the first time period is greater than 50ms and the second time period is 1-10 ms.
In a specific embodiment, when the sampling needle finishes the sample suction, the blood analysis device obtains a first pressure value in the fluid path, after the sampling needle finishes the sample suction for a first time period, the blood analysis device obtains a pressure signal in the fluid path, and after obtaining a pressure signal in the fluid path, the blood analysis device obtains a pressure signal in the fluid path at an interval of a second time period, and then obtains a pressure signal in the fluid path, so that a plurality of pressure signals can be obtained. In this embodiment, after the sampling needle finishes the first time period of sample suction, the number of voltage signals acquired in the liquid path is not limited, and those skilled in the art can set the number according to actual conditions.
S203: an average value of the plurality of pressure signals is calculated as a second pressure value.
Based on the plurality of pressure signals acquired in S202, the blood analysis apparatus of the present embodiment performs an average calculation on the plurality of pressure signals, and obtains a second pressure value.
S204: and calculating the difference value between the first pressure value and the second pressure value as a third pressure value.
In order to avoid the inaccurate detection of the blockage of the sampling needle due to the noise signal generated by the fluid path to the pressure sensor, the blood analysis device of the embodiment calculates the difference between the first pressure value and the second pressure value based on the first pressure value obtained in S201 and the second pressure value obtained in S203, which is the third pressure value of the fluid path.
S205: and judging whether the third pressure value is smaller than a set threshold value.
S206: and determining the blockage of the sampling needle.
Based on the third pressure value obtained in S204, the blood analysis device of this embodiment determines a magnitude relationship between the third pressure value and the set threshold, and determines that the sampling needle is blocked if the third pressure value is smaller than the set threshold; if not, the sampling needle is not blocked.
In one embodiment, the blood analysis device issues an alarm to indicate to the tester that there is a problem with the clinical test results if it is determined that the sampling needle is clogged.
According to the scheme, when the sample sucking ending signal is obtained, a first collecting instruction is sent to a pressure sensor in a liquid path connected with a sampling needle, so that the pressure sensor collects a first pressure value, and the first pressure value sent by the pressure sensor is obtained; sending a plurality of second acquisition instructions to the pressure sensor so as to enable the pressure sensor to acquire a plurality of pressure signals and obtain a plurality of pressure signals sent by the pressure sensor; calculating an average value of the plurality of pressure signals as a second pressure value; and calculating a difference value between the first pressure value and the second pressure value to serve as a third pressure value, judging whether the third pressure value is smaller than a set threshold value, and if so, determining that the sampling needle is blocked. In the embodiment, the third pressure value of the liquid path is obtained by calculating the difference value between the second pressure value and the first pressure value, so that the problem that the sampling needle is blocked and detected inaccurately due to the fact that the liquid path generates a noise signal to the pressure sensor is avoided, and the accuracy of the sampling needle blocking and detection is improved; the method comprises the steps of setting a first time period and a second time period after a sampling needle finishes sample suction, obtaining a first pressure value of a liquid path when the sampling needle finishes sample suction, obtaining a pressure signal after the sampling needle finishes sample suction for the first time period, and obtaining a pressure signal in the liquid path at an interval of the second time period after obtaining the pressure signal in the liquid path to obtain a plurality of pressure signals so as to obtain the second pressure value according to the pressure signals, so that the sampling needle is prevented from being used for sampling continuously or at a short time interval to influence the accuracy of sampling needle blockage detection.
It will be understood by those skilled in the art that in the method of the present invention, the order of writing the steps does not imply a strict order of execution and any limitations on the implementation, and the specific order of execution of the steps should be determined by their function and possible inherent logic.
To implement the method for detecting blockage of the sampling needle according to the above embodiments, a blood analysis apparatus is provided in the present application, and specifically refer to fig. 4, where fig. 4 is a schematic structural diagram of an embodiment of the blood analysis apparatus provided in the present application.
The blood analysis device 400 comprises a processor 42, a memory 41 connected with the processor 42, a sensor 43 and a driving motor 44, wherein the driving motor 44 is connected with a sampling needle to control the sampling needle to perform a sample suction operation. Wherein the memory 41 is coupled to the processor 42.
The memory 41 is used for storing program data, and the processor 42 is used for executing the program data to realize the clogging detection method of the sampling needle of the above-described embodiment.
In the present embodiment, the processor 42 may also be referred to as a CPU (Central Processing Unit). The processor 42 may be an integrated circuit chip having signal processing capabilities. The processor 42 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor 42 may be any conventional processor or the like.
The present application further provides a computer storage medium 500, as shown in fig. 5, the computer storage medium 500 is used for storing program data 51, and the program data 51, when executed by a processor, is used for implementing the occlusion detection method of the sampling needle as described in the method embodiment of the present application.
The method involved in the embodiment of the method for detecting the blockage of the sampling needle can be stored in a device, such as a computer readable storage medium, when the method is implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A method of detecting occlusion of a sampling needle, the method comprising:
when the sampling needle finishes sample suction, acquiring a first pressure value in a liquid path connected with the sampling needle;
after the sampling needle stops sucking the sample, acquiring a second pressure value in the liquid path;
calculating a difference value between the first pressure value and the second pressure value to obtain a third pressure value;
and determining the blockage condition of the sampling needle by using the third pressure value.
2. The method of claim 1,
when the sampling needle finishes absorbing the appearance, obtain with the first pressure value in the liquid way that the sampling needle is connected includes:
when a sample sucking ending signal is acquired, sending a first acquisition instruction to a pressure sensor in a liquid path connected with the sampling needle so that the pressure sensor acquires a first pressure value and acquires the first pressure value sent by the pressure sensor; and the sample sucking ending signal is generated by a driving motor of the sampling needle after the sampling needle is controlled to finish the sample sucking.
3. The method of claim 2,
after the sampling needle stops drawing a sample, obtain the second pressure value in the liquid way, include:
and after a first time period of the sample suction ending signal is acquired, sending a second acquisition instruction to the pressure sensor so that the pressure sensor acquires a second pressure value, and acquiring the second pressure value sent by the pressure sensor.
4. The method of claim 3,
the sending a second acquisition instruction to the pressure sensor to make the pressure sensor acquire a second pressure value, and acquiring the second pressure value sent by the pressure sensor, includes:
sending a plurality of second acquisition instructions to the pressure sensor by taking a second time period as a time interval so as to enable the pressure sensor to acquire a plurality of pressure signals and obtain a plurality of pressure signals sent by the pressure sensor;
calculating an average value of the plurality of pressure signals as the second pressure value.
5. The method of claim 4, wherein the first time period is greater than the second time period.
6. The method of claim 5,
the first time period is greater than 50 ms; and/or
The second time period is 1-10 ms.
7. The method of claim 1,
the determining the blockage condition of the sampling needle by using the third pressure value comprises the following steps:
judging whether the third pressure value is smaller than a set threshold value or not;
and if so, determining that the sampling needle is blocked.
8. The method of claim 7, further comprising:
and when the sampling needle is determined to be blocked, giving an alarm.
9. A blood analysis device is characterized by comprising a processor, a memory connected with the processor, a sensor and a driving motor, wherein the driving motor is connected with a sampling needle to control the sampling needle to perform a sample sucking operation;
wherein the memory has stored therein program data for execution by the processor to implement the method of occlusion detection of a sampling needle of any one of claims 1-8.
10. A computer storage medium, characterized in that the computer storage medium has stored therein program data which, when executed by a processor, is adapted to carry out a method of occlusion detection of a sampling needle according to any one of claims 1-8.
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