Vacuum ultrasonic cleaning device for reusable surgical instruments

Abstract

The invention relates to the technical field of surgical instrument cleaning, in particular to a vacuum ultrasonic cleaning device for a reusable surgical instrument. The device comprises a cleaning tank, a second turbidity sensor, a data processing module and a parameter adjusting module, the second turbidity sensor is used for collecting turbidity data of cleaning liquid in the cleaning tank in the initial cleaning stage of the surgical reusable surgical instrument in the vacuum ultrasonic cleaning device; the data processing module is used for analyzing and processing the acquired turbidity data of the cleaning liquid in the cleaning tank in the initial cleaning stage, and determining the bloodstain change degree of the cleaning liquid and the proportion estimation value of suspended pollutants; the parameter adjusting module is used for adjusting the ultrasonic power of the next cleaning stage based on the bloodstain change degree; the ultrasonic frequency and the air pressure value are adjusted based on the proportional estimate. According to the cleaning device, the cleaning effect of the reusable surgical instrument is ensured, instrument damage is reduced, and the service life of the surgical instrument is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instrument cleaning, and particularly to a vacuum ultrasonic cleaning device for surgically reusable instruments. Background Art

[0002] The cleaning and disinfection of surgical instruments are important links in the reprocessing of medical devices, which are directly related to the surgical safety of patients and the prevention and control of nosocomial infections. At present, vacuum ultrasonic cleaning technology is widely used in hospitals and medical institutions. This technology uses the cavitation effect of ultrasonic waves to effectively remove blood, protein residues and other contaminants on the surface of instruments. At the same time, the application of a vacuum environment helps to reduce the bubbles in the cleaning solution, improve the propagation efficiency of ultrasonic waves in the cleaning solution, and make the cleaning more uniform and thorough, especially suitable for instrument parts with complex structures or difficult to directly access.

[0003] During the operation of existing surgical instrument cleaning devices, it is difficult to adaptively adjust the cleaning parameters for surgical instruments with different degrees of contamination. Usually, fixed ultrasonic frequencies and cleaning times are adopted. This method has two main problems: First, if the cleaning time is too short, contaminants may not be effectively removed, affecting the sterilization effect; Second, if the cleaning time is too long or the ultrasonic power is too high, it may cause wear on the surface of precision surgical instruments and even affect the service life of surgical instruments. Summary of the Invention

[0004] In order to solve the problem that the use of fixed ultrasonic frequencies and cleaning times in the process of cleaning surgical instruments by existing vacuum ultrasonic cleaning devices affects the cleaning effect or service life of surgical instruments, the purpose of the present invention is to provide a vacuum ultrasonic cleaning device for surgically reusable instruments. The specific technical solutions adopted are as follows: The present invention provides a vacuum ultrasonic cleaning device for surgically reusable instruments, which includes a cleaning tank, a second turbidity sensor, a data processing module and a parameter adjustment module; The second turbidity sensor is used to collect the turbidity data of the cleaning solution in the cleaning tank during the initial cleaning stage of surgically reusable instruments in the vacuum ultrasonic cleaning device; The data processing module is used to divide the initial cleaning stage into a first sub-time period, a second sub-time period and a third sub-time period based on the distribution difference of turbidity data within a preset time neighborhood before and after each moment in the initial cleaning stage; combine the data distribution characteristics of the trend term of the turbidity data in the second sub-time period and the turbidity data of the cleaning solution in the first sub-time period to obtain a corrected trend term; determine the degree of blood and dirt change of the cleaning solution and the estimated value of the proportion of suspended contaminants according to the corrected trend term and the turbidity data at the first moment of the third sub-time period; A parameter adjustment module is used to adjust the ultrasonic power in the next cleaning stage based on the degree of blood stain change; and adjust the ultrasonic frequency and air pressure value based on the proportional estimation value.

[0005] Preferably, based on the distribution difference of turbidity data within a preset time neighborhood before and after each moment in the initial cleaning stage, the initial cleaning stage is divided into a first sub-time period, a second sub-time period, and a third sub-time period, including: For any moment in the initial cleaning stage: calculate the first average value of the turbidity data at all moments within the preset time neighborhood after the any moment, and the second average value of the turbidity data at all moments within the preset time neighborhood before the any moment; take the difference between the first average value and the second average value as the first eigenvalue of the any moment. According to the size distribution of the first eigenvalues at all moments in the initial cleaning stage, divide the initial cleaning stage to obtain a first sub-time period, a second sub-time period, and a third sub-time period.

[0006] Preferably, the step of dividing the initial cleaning stage according to the size distribution of the first eigenvalues at all moments in the initial cleaning stage to obtain a first sub-time period, a second sub-time period, and a third sub-time period includes: Take the moment corresponding to the maximum value of the first eigenvalues at all moments in the initial cleaning stage and the moment corresponding to the minimum value of the first eigenvalues as two dividing points. Use the two dividing points to divide the initial cleaning stage into three time periods, and sequentially record the three time periods as the first sub-time period, the second sub-time period, and the third sub-time period in chronological order.

[0007] Preferably, the obtaining of the trend term of the turbidity data in the second sub-time period includes: Use the STL decomposition method to decompose the turbidity data in the second sub-time period and extract the trend term of the turbidity data in the second sub-time period.

[0008] Preferably, the step of obtaining the corrected trend term by combining the data distribution characteristics of the trend term of the turbidity data in the second sub-time period and the turbidity data of the cleaning liquid in the first sub-time period includes: For any data point on the trend term of the turbidity data in the second sub-time period: record the difference between the data value of the any data point and the data value of the first data point on the trend term of the turbidity data in the second sub-time period as the first difference of the any data point; determine the sum of the first difference and the average turbidity data of the cleaning liquid at all moments in the first sub-time period as the corrected value. The corrected values of all data points on the trend term of the turbidity data in the second sub-time period constitute the corrected trend term.

[0009] Preferably, obtaining the degree of blood stain change of the cleaning solution includes: For each data point on the corrected trend term, record the maximum value among the turbidity data at the first moment of the third sub-time period as the turbidity degree of the cleaning solution at the moment corresponding to each data point on the corrected trend term; Calculate the second difference between the turbidity degree of the cleaning solution at the last moment of the second sub-time period and the average turbidity degree of the cleaning solution at all moments of the second sub-time period; Determine the ratio of the second difference to the maximum value of the turbidity degree of the cleaning solution at all moments of the second sub-time period as the degree of blood stain change of the cleaning solution.

[0010] Preferably, obtaining the estimated value of the proportion of suspended pollutants includes: Calculate the third difference between the minimum value of the turbidity degree of the cleaning solution at all moments of the third sub-time period and the average turbidity data of the cleaning solution at all moments of the first sub-time period; Calculate the fourth difference between the turbidity degree of the cleaning solution at the last moment of the second sub-time period and the average turbidity data of the cleaning solution at all moments of the first sub-time period; Determine the ratio between the third difference and the fourth difference as the estimated value of the proportion of suspended pollutants.

[0011] Preferably, after determining the degree of blood stain change of the cleaning solution, it further includes: If the degree of blood stain change is greater than the preset change degree threshold, calculate the estimated value of the proportion of suspended pollutants; If the degree of blood stain change is less than or equal to the preset change degree threshold, no subsequent cleaning is performed on the surgically reusable surgical instruments.

[0012] Preferably, adjusting the ultrasonic power in the next cleaning stage based on the degree of blood stain change includes: Calculate the fifth difference between the degree of blood stain change and the preset change threshold, and the sixth difference between the constant 1 and the preset change threshold; calculate the first ratio of the fifth difference to the sixth difference; Use the first ratio to determine the ultrasonic power in the next cleaning stage and make adjustments.

[0013] Preferably, adjusting the ultrasonic frequency and air pressure value based on the estimated value of the proportion includes: If the estimated value of the proportion is less than the preset first threshold, adjust the ultrasonic frequency to the preset first ultrasonic frequency and adjust the air pressure value to the preset first air pressure value; If the estimated value of the proportion is greater than or equal to the preset first threshold or less than the preset second threshold, both the ultrasonic frequency and the air pressure value remain unchanged; If the ratio estimated value is greater than or equal to a preset second threshold value, adjust the ultrasonic frequency to a preset second ultrasonic frequency and adjust the air pressure value to a preset second air pressure value; Wherein, the preset first threshold value is less than the preset second threshold value, the preset first ultrasonic frequency is less than the preset second ultrasonic frequency, and the preset first air pressure value is less than the preset second air pressure value.

[0014] The present invention has at least the following beneficial effects: The present invention provides a vacuum ultrasonic cleaning device for surgical reusable instruments. The device includes a second turbidity sensor, a data processing module, and a parameter adjustment module. The second turbidity sensor collects the turbidity data of the cleaning liquid in the cleaning tank during the initial cleaning stage of the surgical reusable instruments in the vacuum ultrasonic cleaning device. The data processing module analyzes and processes the turbidity data collected by the second turbidity sensor, divides the initial cleaning stage into three time periods, corrects the trend item of the turbidity data in the second sub-time period according to the data distribution characteristics of the trend item of the turbidity data in the second sub-time period and the turbidity data of the cleaning liquid in the first sub-time period, and comprehensively corrects the trend item and the turbidity data at the first moment of the third sub-time period to evaluate the degree of blood and dirt change of the cleaning liquid, and determines the ratio estimated value of suspended pollutants. Furthermore, the parameter adjustment module realizes the adaptive adjustment of the cleaning parameters during the cleaning process of the surgical reusable instruments, realizes the efficient and intelligent cleaning of the surgical instruments, ensures the cleaning effect of the surgical reusable instruments while reducing the instrument damage and prolonging the service life of the surgical instruments. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is the mechanical structure diagram of a vacuum ultrasonic cleaning device for surgical reusable instruments provided by an embodiment of the present invention; Figure 2 It is the schematic diagram of the data processing flow corresponding to a vacuum ultrasonic cleaning device for surgical reusable instruments provided by an embodiment of the present invention; Figure 3 It is the curve of the turbidity changing with time in the initial cleaning stage provided by an embodiment of the present invention; Figure 1In it, 1 is a cover plate; 2 is a cleaning tank; 3 is a temperature sensor; 4 is a liquid storage tank; 5 is a first turbidity sensor; 6 is a pump; 7 is a heater; 8 is a second turbidity sensor; 9 is a valve; 10 is a filter box; 11 is a filter screen; 12 is a vacuum pump; 13 is an ultrasonic generator; 14 is a box body; 15 is a pressure gauge. Detailed implementation manners

[0017] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, in combination with the accompanying drawings and preferred embodiments, describe in detail a vacuum ultrasonic cleaning device for a surgical reusable surgical instrument proposed according to the present invention as follows.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs.

[0019] The following will specifically describe the specific solution of a vacuum ultrasonic cleaning device for a surgical reusable surgical instrument provided by the present invention in combination with the accompanying drawings.

[0020] An embodiment of a vacuum ultrasonic cleaning device for a surgical reusable surgical instrument: Please refer to Figure 1 , which shows a vacuum ultrasonic cleaning device for a surgical reusable surgical instrument provided by an embodiment of the present invention. The vacuum ultrasonic cleaning device includes: a cover plate 1, a cleaning tank 2, a temperature sensor 3, a liquid storage tank 4, a first turbidity sensor 5, a pump 6, a heater 7, a second turbidity sensor 8, a valve 9, a filter box 10, a filter screen 11, a vacuum pump 12, an ultrasonic generator 13, a box body 14, a pressure gauge 15. In addition, the device further includes a data processing module and a parameter adjustment module.

[0021] Among them, the models of the first turbidity sensor 5 and the second turbidity sensor 5 are both Hach TU5300, the measurement range is 0~1000NTU, and the resolution is 0.0001NTU; the model of the pressure gauge 15 is the YB-100 series pressure gauge, the measurement range is 0~100Mpa, and the accuracy is 2.5%FS; the model of the temperature sensor 3 is Danfoss MBT 3270, the measurement range is -50°C~200°C, and the accuracy is ±1.0°C; the model of the ultrasonic generator 13 is Branson 2000X, the frequency range is 20kHz~40kHz, and the power output is 300W~2000W.

[0022] The operation process of the vacuum ultrasonic cleaning device is as follows: When cleaning surgical reusable surgical instruments, the main steps are as follows: (1) Open the cover plate 1, place the reusable surgical instruments to be cleaned in the cleaning tank 2, cover the cover plate 1, and seal the entire box body 14. (2) Through the pump 6, transport the cleaning liquid in the liquid storage tank 4 to the cleaning tank 2. Through the vacuum pump 12, evacuate the gas in the box body 14 so that the inside of the box body 14 is in a negative pressure state. Start the heater 7. The heater 7 is used to heat the cleaning tank 2. Then, through the ultrasonic generator 13, start cleaning the surgical instruments. (3) After the equipment runs for a period of time, open the valve 9 below the cleaning tank 2. The cleaned cleaning liquid flows to the lower filter box 10 together with the pollutants. After being filtered by the filter screen 11, it re-enters the liquid storage tank 4 and starts the next round of cleaning.

[0023] During the operation of the vacuum ultrasonic cleaning device, the temperature sensor 3, the first turbidity sensor 5, and the second turbidity sensor 8 are all started. The temperature sensor 3 is used to collect temperature data. The first turbidity sensor 5 is used to collect the turbidity data of the cleaning liquid in the liquid storage tank 4. The second turbidity sensor 8 is used to collect the turbidity data of the cleaning liquid in the cleaning tank 2.

[0024] The vacuum ultrasonic cleaning device for reusable surgical instruments in this embodiment further includes a second turbidity sensor 8, a data processing module, and a parameter adjustment module.

[0025] The second turbidity sensor 8 is used to collect the turbidity data of the cleaning liquid in the cleaning tank 2 during the initial cleaning stage of the reusable surgical instruments in the vacuum ultrasonic cleaning device.

[0026] The data processing module is used to divide the initial cleaning stage into a first sub-time period, a second sub-time period, and a third sub-time period based on the distribution difference of the turbidity data within the preset time neighborhood before and after each moment in the initial cleaning stage; combine the data distribution characteristics of the trend term of the turbidity data in the second sub-time period and the turbidity data of the cleaning liquid in the first sub-time period to obtain a corrected trend term; determine the degree of blood and dirt change of the cleaning liquid and the estimated value of the proportion of suspended pollutants according to the corrected trend term and the turbidity data at the first moment of the third sub-time period.

[0027] The parameter adjustment module is used to adjust the ultrasonic power in the next cleaning stage based on the degree of blood and dirt change; adjust the ultrasonic frequency and air pressure value based on the estimated value of the proportion.

[0028] As Figure 2 shown, the figure shows a schematic diagram of the data processing flow corresponding to the vacuum ultrasonic cleaning device for reusable surgical instruments.

[0029] First, set the duration of the initial cleaning stage according to the type of reusable surgical instruments to be cleaned. The first moment of the initial cleaning stage is the first moment in the cleaning process of the current reusable surgical instruments. In this embodiment, the duration of the initial cleaning stage is set to 1 minute. In specific applications, the implementer can set it according to the specific situation. Then, set the air pressure in the initial cleaning stage to 50 kPa, the ultrasonic frequency to 40 kHz, and the ultrasonic power to 70% of the rated power to clean the reusable surgical instruments. Use the second turbidity sensor 8 to collect the turbidity data of the cleaning liquid in the cleaning tank 2 during the initial cleaning stage of the reusable surgical instruments in the vacuum ultrasonic cleaning device. In this embodiment, the collection frequency of the turbidity data is set to once per second. In specific applications, the implementer can set it according to the specific situation.

[0030] So far, the second turbidity sensor 8 has collected the turbidity data of the cleaning liquid in the cleaning tank 2 at each moment during the initial cleaning stage of the reusable surgical instruments in the vacuum ultrasonic cleaning device.

[0031] During the cleaning of traditional reusable surgical instruments, it is unable to adaptively adjust the cleaning duration well for instruments with different degrees of contamination. For example, for orthopedic surgical instruments with different degrees of contamination, when only used for fixing fractures, they come into contact with a small amount of tissue and less bone debris, and the degree of contamination is relatively low. While when used for osteotomy or bone grafting, the surface will be covered with a large amount of blood clots and bone fragments. Uniformly using long-time high-power cleaning may cause slightly contaminated instruments to withstand excessive ultrasonic impact, affecting their service life. In this embodiment, the cleaning result will be judged at regular intervals. When the turbidity of the cleaning liquid is small, it indicates that the reusable surgical instruments are clean, and there is no need for excessive cleaning at this time.

[0032] Considering that traditional turbidity detection measures the turbidity of a liquid based on changes in light scattering or absorption. However, during the cleaning process, due to the action of ultrasonic waves, a large number of tiny bubbles will be formed in the cleaning liquid, and these bubbles will scatter light, resulting in a falsely high value detected by the turbidity sensor, which does not fully represent the actual pollutant concentration. After collecting the turbidity data of the cleaning liquid in the cleaning tank 2 at each moment during the initial cleaning stage, consider segmenting the initial cleaning stage by analyzing the change in the turbidity of the cleaning liquid in the cleaning tank 2.

[0033] Specifically, for any moment in the initial cleaning stage: calculate the average value of the turbidity data at all moments within the preset time neighborhood after this moment, and denote this average value as the first average value; calculate the average value of the turbidity data at all moments within the preset time neighborhood before this moment, and denote this average value as the second average value; take the difference between the first average value and the second average value as the first eigenvalue at this moment. By using this method, the first eigenvalue at each moment in the initial cleaning stage can be obtained. It should be noted that: since no cleaning has been performed before the first moment in the initial cleaning stage and no turbidity data has been collected after the last moment in the initial cleaning stage for the time being, when calculating the first eigenvalue, the first eigenvalue at the first moment and the last moment in the initial cleaning stage are not calculated. In this embodiment, for any moment: the preset time neighborhood before it is: starting from the previous moment of the current moment, in the order of time from the later to the earlier, sequentially obtain a preset number of moments, and take these obtained moments as all moments within the preset time neighborhood before this moment; the preset time neighborhood after this moment is: starting from the next moment of the current moment, in the order of time from the earlier to the later, sequentially obtain a preset number of moments, and take these obtained moments as all moments within the preset time neighborhood after this moment; the preset number in this embodiment is 10, and in specific applications, the implementer can set it according to specific circumstances.

[0034] Take the moment corresponding to the maximum value of the first eigenvalues at all moments in the initial cleaning stage and the moment corresponding to the minimum value of the first eigenvalues as two dividing points; use the two dividing points to divide the initial cleaning stage, and after division, three time periods are obtained. In the order of time, these three time periods are sequentially denoted as the first sub-time period, the second sub-time period, and the third sub-time period.

[0035] The curve of the turbidity change with time in the initial cleaning stage is as Figure 3 shown. The abscissa in the figure is time, and the ordinate is turbidity. The turbidity data in the first sub-time period can better reflect the turbidity of the cleaning solution before cleaning the surgically reusable surgical instruments. Therefore, in this embodiment, according to the turbidity data of the cleaning solution at each moment in the first sub-time period, the average turbidity data of the cleaning solution at all moments in the first sub-time period is calculated, and this average turbidity data can reflect the general situation of the overall turbidity of the cleaning solution before cleaning.

[0036] Due to the influence of the cavitation effect caused by ultrasonic waves, in the second sub-time period, the bubbles generated by the cavitation effect will cause large fluctuations in the turbidity data, and its turbidity data cannot directly reflect the cleaning effect of ultrasonic waves on surgically reusable surgical instruments.

[0037] The turbidity data in the second sub - time period is decomposed using the STL decomposition method. Since the changes in the cleaning liquid during the second sub - time period mainly come from the cavitation effect and the pollutants on the surgical instruments during the cleaning process, as the cleaning process progresses, during each cycle of cleaning, with the ultrasonic frequency fixed, the influence of the cavitation effect is mainly reflected in the periodic term and the residual term, while the content of pollutants has a greater impact on the trend term. Therefore, the trend term is extracted from the STL decomposition results. STL decomposition is an existing technology and will not be elaborated here.

[0038] Since the actual trend term of the turbidity data in the second sub - time period should match the baseline turbidity level before the ultrasonic wave is turned on, therefore, it is necessary to correct the trend term of the turbidity data in the second sub - time period by combining the baseline turbidity level before the ultrasonic wave is turned on.

[0039] Specifically, for any data point on the trend term of the turbidity data in the second sub - time period: the difference between the data value of this data point and the data value of the first data point on the trend term of the turbidity data in the second sub - time period is denoted as the first difference of this data point; the sum of the first difference and the average turbidity data of the cleaning liquid at all times in the first sub - time period is determined as the corrected value of this data point. Using this method, the corrected values of each data point on the trend term of the turbidity data in the second sub - time period can be obtained. The corrected values of all data points on the trend term of the turbidity data in the second sub - time period constitute the corrected trend term, that is, the correction of the trend term obtained by STL decomposition is completed.

[0040] Regarding the turbidity change data after the ultrasonic wave is turned off, since there are many components in the pollutants and some suspended pollutants will gradually settle as the ultrasonic wave is turned off, the turbidity of the cleaning liquid in the third sub - time period will gradually decrease with time.

[0041] The maximum value among the turbidity data at the first moment of the third sub - time period and the corrected value of each data point on the corrected trend term is denoted as the turbidity degree of the cleaning liquid at the corresponding moment of each data point on the corrected trend term. Calculate the difference between the turbidity degree of the cleaning liquid at the last moment of the second sub - time period and the average turbidity degree of the cleaning liquid at all times in the second sub - time period, and denote this difference as the second difference. The ratio of the second difference to the maximum value of the turbidity degrees of the cleaning liquid at all times in the second sub - time period is determined as the blood - stain change degree of the cleaning liquid.

[0042] In this embodiment, the specific calculation formula for the blood - stain change degree is given. The blood - stain change degree can be expressed as: Among them, represents the blood - stain change degree, represents the turbidity degree of the cleaning liquid at the last moment of the second sub - time period, represents the average turbidity of the cleaning liquid at all times in the second sub-time period, represents the maximum value of the turbidity of the cleaning liquid at all times in the second sub-time period.

[0043] represents the second difference. The larger the second difference, the greater the degree of blood stain change in the cleaning liquid.

[0044] Judge the magnitude relationship between the degree of blood stain change and the preset change threshold. If the degree of blood stain change is greater than the preset change threshold, further cleaning of the surgical reusable instrument is performed, that is, the estimated value of the proportion of suspended pollutants is calculated; if the degree of blood stain change is less than or equal to the preset change threshold, no further cleaning of the surgical reusable instrument is performed, that is, the calculation of the estimated value of the proportion of suspended pollutants is not carried out. In this embodiment, the preset change degree threshold is 0.05. In specific applications, the implementer can set it according to specific circumstances.

[0045] Considering the substances such as suspended blood proteins and lipids (suspended pollutants) remaining in the surgical instruments, their attachment is relatively loose, containing more soluble components, and is easily affected by ultrasonic cavitation effect and fluid disturbance. Therefore, ultrasonic cleaning is relatively easy; while pollutants with large particles, high density, and fast sedimentation, such as solidified blood clots or bone fragments (sedimentation pollutants), have strong adhesion and are more difficult to clean. The degree of blood stain change quantifies the growth of overall pollutants. Considering that after the ultrasonic is turned off, the turbidity of the cleaning liquid gradually decreases with time in the third sub-time period. Therefore, when the minimum value of the turbidity of the cleaning liquid at all times in the third sub-time period is relatively large, it indicates that the content of suspended pollutants in the cleaning liquid is relatively high after this cleaning; when the minimum value of the turbidity of the cleaning liquid at all times in the third sub-time period is relatively small, it indicates that the content of sedimentation pollutants in the cleaning liquid is relatively high after this cleaning.

[0046] Based on the above characteristics, calculate the difference between the minimum value of the turbidity of the cleaning liquid at all times in the third sub-time period and the average turbidity data of the cleaning liquid at all times in the first sub-time period, and record this difference as the third difference; calculate the difference between the turbidity of the cleaning liquid at the last moment of the second sub-time period and the average turbidity data of the cleaning liquid at all times in the first sub-time period, and record this difference as the fourth difference; determine the estimated value of the proportion of suspended pollutants according to the third difference and the fourth difference.

[0047] In this embodiment, a specific calculation formula for the degree of blood stain change of the cleaning liquid is given, and the estimated value of the proportion of suspended pollutants can be expressed as: where, represents the estimated value of the proportion of suspended pollutants, represents the minimum value of the turbidity of the cleaning liquid at all times in the third sub-time period, represents the turbidity of the cleaning liquid at the last moment of the second sub-time period, represents the average turbidity data of the cleaning liquid at all times in the first sub-time period.

[0048] represents the third difference. The turbidity of the cleaning liquid at the last moment of the second sub-time period is greater than the average turbidity data of the cleaning liquid at all times in the first sub-time period. Therefore, the third difference will not be 0; represents the fourth difference. The ratio of the third difference to the fourth difference is used as the proportional estimate value of the suspended pollutants. When the third difference is larger and the fourth difference is smaller, it indicates that the proportional estimate value of the suspended pollutants is larger.

[0049] Next, set the parameter data for the next cleaning of the surgical reusable instruments according to the degree of blood stain change and the proportional estimate value.

[0050] Specifically, calculate the difference between the degree of blood stain change and the preset change threshold, and record this difference as the fifth difference; calculate the difference between the constant 1 and the preset change threshold, and record this difference as the sixth difference; calculate the ratio of the fifth difference to the sixth difference, and record this ratio as the first ratio; use the first ratio to determine the ultrasonic power in the next cleaning stage.

[0051] In this embodiment, a specific calculation formula for the ultrasonic power in the next cleaning stage is given. The ultrasonic power in the next cleaning stage can be expressed as: Among them, represents the ultrasonic power in the next cleaning stage, represents the degree of blood stain change, represents the preset change threshold, represents the maximum allowable ultrasonic power.

[0052] represents the fifth difference, represents the sixth difference, represents the first ratio. When the degree of blood stain change is greater than the preset change threshold, the fifth difference is greater than 0, and the ultrasonic power is increased for further cleaning; when the degree of blood stain change is less than the preset change threshold, the fifth difference is less than 0, and the ultrasonic power is decreased for further cleaning. In this embodiment, the value of the preset change threshold is 0.3. In specific applications, the implementer can set it according to the specific situation.

[0053] When the estimated proportion of suspended pollutants is relatively large, the main pollutants on the instrument are suspended pollutants, which are relatively easy to clean. It is necessary to further increase the ultrasonic frequency and the air pressure in the vacuum chamber to reduce the damage of cavitation to the surgical instruments. Conversely, it is necessary to reduce the ultrasonic frequency and the air pressure in the vacuum chamber.

[0054] Therefore, if the estimated proportion of suspended pollutants is less than the preset first threshold, the ultrasonic frequency is adjusted to the preset first ultrasonic frequency, and the air pressure value is adjusted to the preset first air pressure value; if the estimated proportion of suspended pollutants is greater than or equal to the preset first threshold or less than the preset second threshold, both the ultrasonic frequency and the air pressure value remain unchanged; if the estimated proportion of suspended pollutants is greater than or equal to the preset second threshold, the ultrasonic frequency is adjusted to the preset second ultrasonic frequency, and the air pressure value is adjusted to the preset second air pressure value; where the preset first threshold is less than the preset second threshold, the preset first ultrasonic frequency is less than the preset second ultrasonic frequency, and the preset first air pressure value is less than the preset second air pressure value. In this embodiment, the preset first threshold is 0.4, the preset second threshold is 0.6, the preset first ultrasonic frequency is 35 kHz, the preset first air pressure value is 40 kPa, the preset second ultrasonic frequency is 45 kHz, and the preset second air pressure value is 60 kPa. In specific applications, the implementer can set the values of the preset first ultrasonic frequency, the preset first air pressure value, the preset second ultrasonic frequency, and the preset second air pressure value according to the types of surgical reusable instruments.

[0055] Furthermore, according to the adjusted ultrasonic generator parameters and air pressure parameters, the surgical reusable instruments are subjected to the next round of cyclic cleaning until a prompt is given when the turbidity of the cleaning liquid in the cleaning tank 2 is greater than the preset turbidity threshold, and the cleaning liquid is replaced; the preset turbidity threshold is set by the implementer according to specific circumstances and will not be elaborated here.

[0056] In this embodiment, the cleaning duration for each time is set. After each cleaning is completed, the turbidity of the cleaning liquid in the cleaning tank 2 is judged. When the turbidity of the cleaning liquid in the cleaning tank 2 is small or less than the preset threshold, it means that the surgical reusable instruments have been cleaned and no further cleaning is required; when the turbidity of the cleaning liquid in the cleaning tank 2 is large or greater than or equal to the preset threshold, it means that the surgical reusable instruments have not been cleaned and further cleaning is required. Therefore, subsequent cleaning is carried out until the cleaning of the surgical reusable instruments is completed. The preset threshold is set by the implementer according to specific circumstances. The cleaning duration for each time is 1 minute. In specific applications, the implementer can also set it according to specific circumstances.

[0057] So far, by using the method provided in this embodiment, the cleaning work of the surgical reusable instruments has been completed by using the vacuum ultrasonic cleaning device, ensuring the stability of the cleaning effect of the surgical reusable instruments, improving the cleaning quality and the equipment use efficiency, and prolonging the service life of the surgical instruments.

[0058] This embodiment provides a vacuum ultrasonic cleaning device for surgically reusable surgical instruments. The device includes a second turbidity sensor, a data processing module, and a parameter adjustment module. The second turbidity sensor collects the turbidity data of the cleaning liquid in the cleaning tank 2 during the initial cleaning stage of the surgically reusable surgical instruments in the vacuum ultrasonic cleaning device. The data processing module analyzes and processes the turbidity data collected by the second turbidity sensor, divides the initial cleaning stage into three time periods, corrects the trend item of the turbidity data in the second sub-time period according to the data distribution characteristics of the trend item of the turbidity data in the second sub-time period and the turbidity data of the cleaning liquid in the first sub-time period, and comprehensively evaluates the degree of blood and dirt change of the cleaning liquid based on the corrected trend item and the turbidity data at the first moment of the third sub-time period, and determines the estimated value of the proportion of suspended pollutants. Furthermore, the parameter adjustment module realizes the adaptive adjustment of the cleaning parameters during the cleaning process of the surgically reusable surgical instruments, realizes efficient and intelligent surgical instrument cleaning, ensures the cleaning effect of the surgically reusable surgical instruments while reducing instrument damage and extending the service life of the surgical instruments.

[0059] It should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vacuum ultrasonic cleaning device for surgical reusable surgical instruments, characterized in that: The device comprises a cleaning tank, a second turbidity sensor, a data processing module and a parameter adjustment module; A second turbidity sensor is used to collect turbidity data of the cleaning liquid in the cleaning tank during the initial cleaning stage of the reusable surgical instrument in the vacuum ultrasonic cleaning device; A data processing module is used to divide the initial cleaning stage into a first sub-time period, a second sub-time period, and a third sub-time period based on the distribution difference of turbidity data in a preset time neighborhood before and after each moment in the initial cleaning stage; obtain a corrected trend item by combining the data distribution characteristics of the trend item of the turbidity data of the second sub-time period and the turbidity data of the cleaning solution in the first sub-time period; determine the degree of change of blood stains in the cleaning solution and the estimated value of the proportion of suspended pollutants based on the corrected trend item and the turbidity data at the first moment of the third sub-time period; A parameter adjustment module, used to adjust the ultrasonic power of the next cleaning stage based on the degree of change of blood stains; The ultrasonic frequency and air pressure are adjusted based on the ratio estimate.

2. A vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 1, characterized in that: The initial cleaning stage is divided into a first sub-time period, a second sub-time period and a third sub-time period based on the distribution difference of turbidity data in a preset time neighborhood before and after each moment in the initial cleaning stage, including: For any moment in the initial cleaning stage: calculate a first average value of turbidity data at all moments in a preset time neighborhood after the any moment, and a second average value of turbidity data at all moments in a preset time neighborhood before the any moment; and use the difference between the first average value and the second average value as the first characteristic value at the any moment; The initial cleaning stage is divided according to the size distribution of the first characteristic values ​​at all moments in the initial cleaning stage to obtain a first sub-time period, a second sub-time period and a third sub-time period.

3. A vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 2, characterized in that: The initial cleaning stage is divided according to the size distribution of the first characteristic value at all moments in the initial cleaning stage to obtain a first sub-time period, a second sub-time period and a third sub-time period, including: The time corresponding to when the first characteristic value of all moments in the initial cleaning stage takes the maximum value and the time corresponding to when the first characteristic value takes the minimum value are used as two dividing points; The initial cleaning phase is divided into three time periods using two division points, and the three time periods are recorded in chronological order as a first sub-time period, a second sub-time period, and a third sub-time period.

4. The vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 1, characterized in that: The acquisition of the trend item of the turbidity data of the second sub-time period includes: The STL decomposition method is used to decompose the turbidity data of the second sub-time period, and the trend item of the turbidity data of the second sub-time period is extracted.

5. The vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 1, characterized in that: The step of combining the data distribution characteristics of the trend item of the turbidity data of the second sub-time period with the turbidity data of the cleaning solution of the first sub-time period to obtain a corrected trend item includes: For any data point on the trend item of the turbidity data of the second sub-time period: the difference between the data value of the any data point and the data value of the first data point on the trend item of the turbidity data of the second sub-time period is recorded as the first difference value of the any data point; the sum of the first difference value and the average turbidity data of the cleaning liquid at all times in the first sub-time period is determined as the corrected value; The corrected values ​​of all data points on the trend item of the turbidity data of the second sub-time period constitute the corrected trend item.

6. The vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 5, characterized in that: Obtaining the degree of change in the blood stain of the cleaning fluid, including: The maximum value of each data point on the corrected trend item and the turbidity data at the first moment of the third sub-time period are recorded as the turbidity degree of the cleaning solution at the moment corresponding to each data point on the corrected trend item; Calculating a second difference between the turbidity of the cleaning solution at the last moment of the second sub-time period and the average turbidity of the cleaning solution at all moments of the second sub-time period; The ratio of the second difference to the maximum value of the turbidity of the cleaning fluid at all times in the second sub-time period is determined as the degree of change of the blood stain in the cleaning fluid.

7. The vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 1, characterized in that: Obtaining estimates of the proportion of suspended pollutants, including: Calculate a third difference between the minimum value of the turbidity of the cleaning solution at all times in the third sub-time period and the average turbidity data of the cleaning solution at all times in the first sub-time period; Calculate a fourth difference between the turbidity of the cleaning solution at the last moment of the second sub-time period and the average turbidity data of the cleaning solution at all moments of the first sub-time period; The ratio between the third difference and the fourth difference is determined as an estimated value of the proportion of suspended pollutants.

8. The vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 1, characterized in that: After determining the degree of blood stain change in the cleaning fluid, it also includes: If the degree of change of the blood stain is greater than the preset change degree threshold, the estimated value of the proportion of suspended pollutants is calculated; If the degree of change of the blood stain is less than or equal to the preset degree of change threshold, the surgical reusable surgical instrument will not be subsequently cleaned.

9. The vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 1, characterized in that: The method of adjusting the ultrasonic power of the next cleaning stage based on the degree of change of the blood stains comprises: Calculating a fifth difference between the blood stain change degree and a preset change threshold, and a sixth difference between the constant 1 and the preset change threshold; calculating a first ratio of the fifth difference to the sixth difference; The ultrasonic power of the next cleaning stage is determined by using the first ratio and adjusted.

10. The vacuum ultrasonic cleaning device for reusable surgical instruments according to claim 1, characterized in that: The adjusting the ultrasonic frequency and the air pressure value based on the estimated value of the ratio comprises: If the estimated value of the ratio is less than a preset first threshold, adjusting the ultrasonic frequency to a preset first ultrasonic frequency, and adjusting the air pressure value to a preset first air pressure value; If the estimated value of the ratio is greater than or equal to a preset first threshold or less than a preset second threshold, the ultrasonic frequency and the air pressure value remain unchanged; If the estimated value of the ratio is greater than or equal to a preset second threshold, adjusting the ultrasonic frequency to a preset second ultrasonic frequency, and adjusting the air pressure value to a preset second air pressure value; Among them, the preset first threshold is smaller than the preset second threshold, the preset first ultrasonic frequency is smaller than the preset second ultrasonic frequency, and the preset first air pressure value is smaller than the preset second air pressure value.

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