Intelligent evaluation system for ventilation function examination

Abstract

The application discloses an intelligent evaluation system for ventilation function examination, and solves the problem that the quality evaluation of ventilation function examination is mainly based on subjective feeling, lacks reasonable and objective evaluation standards, and is prone to evaluation errors and confusion, and the technical scheme is as follows: a lung function instrument for measurement, a VC measurement and judgment module for judging the measurement result of vital capacity, a curve display and judgment module for synchronously measuring and displaying a forced vital capacity curve and a maximum expiratory flow volume curve, a measurement reminding module for measurement reminding, and a processing and evaluation module for evaluating the measurement result and selecting a corresponding curve for parameter calculation.The intelligent evaluation system for ventilation function examination can objectively and accurately evaluate the quality of ventilation examination, and significantly improves the accuracy and efficiency of lung ventilation function examination.

Description

TECHNICAL FIELD

[0001] The present application relates to ventilation function evaluation technology, in particular to a kind of intelligent evaluation system of ventilation function examination. BACKGROUND

[0002] Pulmonary function test has important value, health and health planning includes routine physical examination item, after a variety of documents repeatedly emphasize, but the actual implementation effect is very poor.In recent 2 years, the intensity of promotion increases, especially in the extensive promotion in grass-roots, but how to accurately evaluate determination quality and guarantee quality control requirement becomes a major problem.

[0003] Unlike most examination items, pulmonary ventilation function test has high subjectivity, and quality evaluation has high theoretical nature, which needs strong respiratory physiology knowledge as foundation.Lack of respiratory physiology knowledge not only exists widely in grass-roots, but also is a common problem among respiratory specialist and pulmonary function technician.In pulmonary function test, ventilation function test is the most basic and main examination, and ventilation function test by simple pulmonary function instrument is also an important means of hospitals and departments at all levels, and is the main means of grass-roots hospital or health examination.Current domestic and foreign academic departments or equipment manufacturers all propose operation guide or specific operation, evaluation measure, but there are many problems, and actual content is basically simple summary of previous operation process, which has great gap with modern actual operation and evaluation, especially FVC curve (forced vital capacity curve) and MEFV curve (maximum expiratory flow-volume curve) synchronous determination lacks reasonable objective evaluation standard, and actual operability is not strong. SUMMARY

[0004] The purpose of the present application is to provide an intelligent evaluation system for ventilation function test, which can objectively and accurately evaluate and improve the accuracy and efficiency of pulmonary ventilation function test.

[0005] The above technical purpose of the present application is realized by the following technical scheme:

[0006] An intelligent evaluation system for ventilation function test comprises:

[0007] Pulmonary function instrument, for determining and obtaining VC value, FVC curve and MEFV curve;

[0008] VC determination and judgment module is provided with VC difference threshold, and the difference of VC results of two determinations is calculated, if the VC difference threshold is not exceeded, the maximum value is taken as the VC result; if the VC difference threshold is exceeded, re-determination is carried out and re-judgment is carried out;

[0009] The curve display judging module displays the synchronous measured and obtained FVC curve and MEFV curve, and judges the initial stage of expiration, the expiration process and the terminal stage of expiration according to the set standards, and outputs the measured requirement when each stage meets the corresponding standard, and outputs the measured requirement not meeting the measured requirement when any stage does not meet the corresponding standard;

[0010] The measurement reminding module is provided with a reminding interval time and a reminding upper limit number of times, and is used for reminding the subject to perform measurement again under the set interval time and judging condition when the measured requirement is not met;

[0011] The processing evaluation module is provided with a parameter difference threshold value, and is used for evaluating the measurement result and selecting the corresponding curve for parameter calculation;

[0012] If the curve meets the measured requirement, the difference between FVC and FEV1 is calculated, and when the difference between the two best measurements is within the parameter difference threshold value, the evaluation standard of the measured requirement meeting A level is output; when the difference exceeds the parameter difference threshold value, the evaluation standard of the measured requirement not meeting A level is output; the curve with the maximum FVC+FEV1 value and the synchronous measured MEFV curve are selected for the calculation of all related parameters;

[0013] If the measured curve does not meet the requirement, the reliability of the output result is poor, and the curve with the maximum FVC+FEV1 value and the synchronous measured MEFV curve are selected for the calculation of all related parameters.

[0014] In summary, the present application has the following beneficial effects:

[0015] Through the VC measurement judging module, the curve display judging module and the processing evaluation module, the result measured by the lung function instrument can be automatically and intelligently judged, the measurement reminding module can cooperate with each module to obtain data, the ventilation function measurement can be objectively and accurately evaluated through the set objective evaluation standard, and the accuracy and efficiency of the lung ventilation function examination can be significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic block diagram of the system;

[0017] Figure 2 is a processing schematic diagram of the VC measurement judging module;

[0018] Figure 3 is a processing schematic diagram of the curve display judging module and the processing evaluation module. DETAILED DESCRIPTION

[0019] The present application will be further described in detail below with reference to the accompanying drawings.

[0020] According to one or more embodiments, an intelligent evaluation system for ventilation function test is disclosed, as shown in Figure 1 which comprises a lung function instrument, a VC determination judgment module, a curve display judgment module, a determination reminding module and a processing evaluation module.

[0021] The determination reminding module is set with a reminding interval time and a reminding upper limit number of times, and is used for reminding the subject to perform determination again under the set interval time and judgment condition. When the determination needs to be performed again, the determination reminding module is used to perform determination reminding. The determination reminding module is set with a reminding interval time of 2 minutes and a reminding upper limit number of times of eight.

[0022] The lung function instrument is used to determine the vital capacity (VC) and ventilation function. The ventilation function is the synchronous determination of the FVC curve and the MEFV curve. The simple or standard lung function instrument, or the body volume plethysmograph can be used for determination.

[0023] The VC determination judgment module is set with a VC difference threshold, and the difference threshold is set to 5%. The difference between the two determination results needs to be calculated. If the difference is less than or equal to 5%, the maximum value of the two determination results is taken as the VC result. If the difference is greater than 5%, the determination is performed again after the reminding of the determination reminding module, and the judgment is performed again until the difference between the best two times is less than or equal to 5%, and the maximum value is taken as the VC result. If the determination has reached the upper limit or the subject cannot or does not want to continue the determination, the best determination value in the multiple determinations is selected as the VC result, and "no repeatable result" is automatically displayed. The specific processing process of the VC determination judgment module is shown in Figure 2 .

[0024] The curve display judgment module displays the FVC curve and the MEFV curve obtained by synchronous determination, and judges the exhalation initial stage, the exhalation process and the exhalation terminal stage according to the set standards, and outputs that the determination meets the requirements when the stages all meet the corresponding standards, and outputs that the determination does not meet the requirements otherwise. The synchronous determination of the FVC curve and the MEFV curve shows that both curves meet the requirements when any one curve meets the determination requirements.

[0025] The curve display judgment module displays the coordinate axes. The horizontal coordinate of the FVC curve is time (t) with s as the unit, and each distance unit is a relative value and does not necessarily represent 1 s. The vertical coordinate is volume (V) with each distance unit representing 1 L. The horizontal coordinate of the MEFV curve is volume (V) with each distance unit representing 1 L. The vertical coordinate is flow rate (F) with each distance unit representing 1 L / s. The ratio of the vertical coordinate to the horizontal coordinate is 1:4. The fixed ratio of the vertical coordinate to the horizontal coordinate facilitates comparison, improves the accuracy of determination and the convenience of evaluation, and the visual effect of the 1:4 ratio is good, and the objective standard for evaluation has been established.

[0026] The curve display and determination module displays the selected FVC curve, as well as parameters such as FVC, forced expiratory volume in one second (FEV1), and one-second rate (FEV1 / FVC); it also displays the MEFV curve, which is completed synchronously with the FVC curve, and displays peak expiratory flow (PEF) and forced expiratory flow (FEF) at 25% of vital capacity. 25 Forced exhalation of 50% of vital capacity (FEF) 50 Forced exhalation of 75% of vital capacity (FEF) 75 ).

[0027] The curve display and judgment module corresponds to the extrapolation method used to determine the extrapolated volume (EV) and the exhalation start point of the FVC curve. Specifically, the exhalation start point is the intersection of the extended lines drawn along the maximum slopes of the breath-hold flat segment and the exhalation segment of the FVC curve. The exhaled volume before the exhalation start point is called the EV. The initial stage standard for the FVC curve is EV ≤ 5% of FVC, which is an objective standard for meeting the requirements of the initial expiratory burst force. If it meets the requirements, it displays "Initial measurement meets requirements"; otherwise, it displays "Initial measurement does not meet requirements, measurement result for reference only." The standard for the exhalation process stage is that the curve has no abrupt changes. Specifically, the standard is that there are no sudden rises and / or sudden falls during the curve's descent. If there are no abrupt changes, it displays "Measurement process meets requirements"; otherwise, it displays "Measurement process does not meet requirements, measurement result for reference only." The criteria for the end-expiratory phase are that the FVC curve stably drops to zero at the end. Specifically, the criteria are a volume change <25ml, a time >1s, or an expiratory time ≥7s. An expiratory time ≥7s is for patients with obstructive or predominantly obstructive mixed ventilatory dysfunction. If the criteria are met, the system will display "Terminal measurement meets requirements"; otherwise, it will display "Terminal measurement does not meet requirements; measurement results are for reference only." If all three measurements meet the requirements, the system will automatically display "Measurement meets requirements"; if any measurement does not meet the requirements, the system will display "Measurement does not meet requirements; measurement results are for reference only."

[0028] The curve display judgment module corresponds to the MEFV curve, showing the angle β between the rising tangent line of the flow rate and the horizontal axis. The initial stage standard for the MEFV curve is β ≥ 80 degrees. If β ≥ 80 degrees, it displays "Initial measurement meets requirements"; otherwise, it automatically displays "Initial measurement does not meet requirements, measurement results are for reference only". The standard for the process stage is that the curve has no abrupt changes during the first 1 second of exhalation. Specifically, the standard is that there is no sudden rise and / or sudden drop during the curve's descent. If there are no abrupt changes, it automatically displays "Process measurement meets requirements"; otherwise, it automatically displays "Process measurement does not meet requirements, measurement results are for reference only". During the process after 1 second of exhalation, the evaluation curve has no abrupt changes. Specifically, the standard is that there is no sudden rise and / or sudden drop during the curve's descent. If there are no abrupt changes, it automatically displays "Process measurement meets requirements"; otherwise, it automatically displays "Process measurement does not meet requirements, measurement results are for reference only". The standard for the terminal stage is that the curve naturally drops to zero at the end. Specifically, the standard is that the flow rate drops to <0.025L / s, the time is >1s, or the exhalation time is ≥7s. If it meets the requirements, it will display "Terminal measurement meets the requirements"; otherwise, it will display "Terminal measurement does not meet the requirements, measurement result is for reference only". If all four parts of the measurement or the other three parts except the third part meet the requirements, it will automatically display "Measurement meets the requirements"; otherwise, it will automatically display "Measurement does not meet the requirements, measurement result is for reference only".

[0029] Minor pauses are more likely to occur in the middle portion of the MEFV curve, but the specific cause is difficult to assess, and their impact on ventilation function evaluation is limited. If FVC meets the requirements, minor pauses in the middle and later parts of the MEFV curve measured simultaneously have little impact on ventilation function evaluation (except for low-volume flow rates), and are only used as a reminder.

[0030] After the measurement is repeated, the FVC curve and MEFV curve are measured simultaneously again, and the results are judged and displayed according to the above requirements.

[0031] The processing and evaluation module has a parameter difference threshold set, evaluates the measurement results, and selects the corresponding curve for parameter calculation.

[0032] If the curve measurement meets the requirements, the processing and evaluation module selects the corresponding curve to calculate the difference between FVC and FEV1. The difference threshold is set to 150ml. When the difference between two optimal measurements is within the parameter difference threshold, the evaluation standard of "measurement reaches Grade A" is output. If the difference between any parameter of FVC and FEV1 is ≥150ml, the measurement reminder module prompts a 2-minute rest before measuring again, until the difference between two optimal measurements is within 150ml. If the difference between any parameter of FVC and FEV1 is ≥150ml, or the measurement has reached eight times, or the examinee is unable or unwilling to continue measuring, the evaluation standard of "measurement does not reach Grade A" is output. The curve with the largest FVC+FEV1 value and its simultaneously measured MEFV curve are selected for the calculation of all relevant parameters. If the exhalation time is ≥7s, the one-second rate is taken as FEV1 / FEV7.

[0033] If none of the curve measurements meet the requirements after the measurement is completed, the processing and evaluation module outputs an evaluation result of "poor result reliability" and selects the curve with the largest FVC+FEV1 value and its simultaneously measured MEFV curve for the calculation of all relevant parameters. The specific processing procedures of the curve display judgment module and the processing and evaluation module are as follows: Figure 3 As shown.

[0034] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An intelligent evaluation system for ventilation function testing, characterized in that, Including: A pulmonary function analyzer is used to measure and obtain VC values, FVC curves, and MEFV curves. The VC measurement and judgment module has a set VC difference threshold. It calculates the difference between two VC measurements. If the difference does not exceed the VC difference threshold, the maximum value is taken as the VC result. If the VC difference threshold is exceeded, the measurement will be repeated and the judgment will be made again. The curve display and judgment module displays the simultaneously measured and acquired FVC and MEFV curves. Based on set standards, it judges the initial, expiratory, and terminal expiratory phases. If each phase meets the corresponding standard, the output shows "Measurement Meets Requirements"; otherwise, if any phase fails to meet the corresponding standard, the output shows "Measurement Meets Requirements Are Not Met". The curve display and judgment module displays the FVC curve and FVC, forced expiratory volume in one second (FEV1), and the FEV1 / FVC ratio. It also displays the MEFV curve corresponding to the FVC curve, peak expiratory flow rate (PEF), and forced expiratory flow rate (FEF) at 25% of vital capacity. 25 Forcefully exhale 50% of your vital capacity with an expiratory flow rate (FEF). 50 Forcefully exhale 75% of your vital capacity with an expiratory flow rate (FEF). 75 ; The curve display and determination module displays the extrapolated volume (EV) and the determined exhalation start point on the FVC curve. The exhalation start point is the intersection of the extended lines drawn along the maximum slope of the flat section of the FVC curve during breath-holding and the maximum slope of the exhalation section. The initial stage standard for the FVC curve is EV ≤ 5% of FVC; the process stage standard is that the curve has no abrupt changes; the terminal stage standard is that the curve stably drops to zero at the terminal stage, with specific requirements of volume change < 25 ml, time > 1 s or exhalation time ≥ 7 s. The MEFV curve measurement and display corresponding to the curve display and determination module shows the angle β between the flow rate rising branch tangent and the horizontal axis. The initial stage standard for the MEFV curve is β ≥ 80 degrees; the process stage standard is that the curve has no abrupt changes in the first 1 second of exhalation; the terminal stage standard is that the curve naturally drops to zero at the end, specifically requiring the flow rate to drop to < 0.025 L / s and the time to drop to > 1 s or the exhalation time to ≥ 7 s. The test reminder module has a set reminder interval and a maximum number of reminders. It is used to remind test subjects who have not met the test requirements to retake the test at the set interval and under the set judgment conditions. The processing and evaluation module has a set parameter difference threshold, evaluates the measurement results, and selects the corresponding curve for parameter calculation. If the curve meets the measurement requirements, select the corresponding curve to calculate the difference between FVC and FEV1. When the difference between the two optimal measurements is within the parameter difference threshold, output the evaluation standard that the measurement meets Grade A; when the difference exceeds the parameter difference threshold, output the evaluation standard that the measurement does not meet Grade A; select the curve with the largest FVC+FEV1 value and its synchronously measured MEFV curve for the calculation of all relevant parameters. If the measured curve does not meet the requirements, the reliability of the output results is poor. Select the curve with the largest FVC+FEV1 value and its synchronously measured MEFV curve for the calculation of all relevant parameters.

2. The intelligent evaluation system for ventilation function testing according to claim 1, characterized in that: The curve display and determination module displays the FVC curve with time t on the horizontal axis (in seconds) and each distance unit as a relative value; and volume V on the vertical axis (each distance unit represents 1L). The MEFV curve is displayed with volume V on the horizontal axis, where each distance unit represents 1L, and flow rate F on the vertical axis, where each distance unit represents 1L / s. The ratio of the vertical axis to the horizontal axis is 1:

4.

3. The intelligent evaluation system for ventilation function testing according to claim 1, characterized in that: The measurement reminder module is set to a reminder interval of 2 minutes and a maximum number of reminders of eight.

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