A urinary surgery postoperative drainage tube intelligent monitoring and complication early warning method

Abstract

The present application relates to a kind of urological postoperative drainage tube intelligent monitoring and complication early warning method, applied to the drainage control system including postoperative drainage tube, liquid collection container, negative pressure control pump, isolation valve, drainage valve, flushing valve, flushing branch, metering back extraction branch, dredging execution piece, parameter acquisition component and controller.The method collects inlet end pressure value, outlet end pressure value, drainage liquid flow rate, liquid collection container negative pressure value and negative pressure control pump driving amount, forms pipeline operation data group;When meeting preset review starting condition, execute isolation review process, collect negative pressure attenuation response and back extraction flow response, and generate obstruction type, leakage type or overpressure type review typing result;According to different results, execute negative pressure slow release, flushing valve pulse control, dredging execution piece intermittent drive, negative pressure correction, drainage recovery or equipment lock control, and output pipeline parameter abnormal early warning signal.

Description

Technical Field

[0001] This invention relates to the field of medical fluid control and drainage equipment technology, and in particular to a method for intelligent monitoring and early warning of complications of postoperative drainage tubes in urology. Background Technology

[0002] The intelligent monitoring and complication early warning method for postoperative drainage tubes in urology involves the field of medical fluid control and drainage equipment technology, and in particular, it involves methods for monitoring the operation status of postoperative drainage tubes, negative pressure control, tube abnormality prompts, and drainage equipment operation control.

[0003] Following urological surgery, a postoperative drainage tube is typically placed and connected to a collection container, a negative pressure generator, or a negative pressure control pump to continuously drain surgical site exudate, blood, urine, or a mixture of fluids from flushing. Existing negative pressure drainage devices usually create negative pressure within the collection container using a negative pressure generator, causing the fluid in the drainage tube to enter the collection container under pressure differential. To reduce the impact of drainage tube blockage or abnormal negative pressure on the drainage process, some existing technologies incorporate pressure sensors, monitoring connectors, cleaning bottles, or alarm components in the drainage tube. When abnormal drainage tube pressure is detected, an alarm or cleaning action is triggered to indicate and address the issue. For example, patent application CN118453979A discloses a multifunctional medical negative pressure drainage device that monitors the drainage tube pressure using an elastic diaphragm and pressure sensor within the monitoring connector, and controls a cleaning bottle to clean the drainage tube when abnormal pressure occurs.

[0004] However, in postoperative drainage scenarios in urology, abnormalities in the drainage tubing are not always caused by blockages. They may also be related to factors such as poor interface sealing, abnormal negative pressure in the collection container, excessive negative pressure output, changes in the flow pattern of the drainage fluid, or localized pressure on the tubing. Existing negative pressure drainage devices typically use a single pressure change or a simple threshold alarm as the trigger for abnormalities, making it difficult to accurately distinguish between different types of tubing malfunctions. When the cause of the abnormality cannot be effectively identified, the device may perform cleaning actions under inappropriate negative pressure conditions, or only output an alarm when it is necessary to restore tubing patency, thus affecting the continuity and stability of the drainage process.

[0005] Furthermore, the operational status of postoperative drainage tubes is closely related to the observation of postoperative conditions by medical staff. If tube blockage, leakage, or abnormal negative pressure is not promptly identified and addressed by the equipment, changes in drainage volume, drainage rate, or the appearance of drainage fluid may not be reflected in a timely and accurate manner. This increases the difficulty for medical staff in observing and assessing the risk of postoperative complications such as bleeding, urinary leakage, fluid accumulation, and infection. Although existing devices can trigger alarms or clean the tubes when pressure is abnormal, their abnormal indications and handling actions are usually relatively simple and cannot perform matching equipment control actions based on differences in the physical operating status of the tubes.

[0006] Therefore, improving the accuracy of identifying the causes of abnormalities in drainage tubing and controlling equipment handling during postoperative drainage in urology, reducing invalid alarms, accidental cleaning, or drainage interruptions caused by blockage, leakage, or abnormal negative pressure, and providing reliable equipment status indicators for monitoring postoperative complication risks are the main technical problems that need to be solved in this field. Summary of the Invention

[0007] To overcome the aforementioned technical deficiencies, the present invention aims to provide a method for intelligent monitoring and complication early warning of postoperative drainage tubes in urological surgery. This invention employs a method of collecting tubing operation data during drainage operation and executing an isolation verification process when the data meets preset verification start conditions. This obtains negative pressure attenuation response and backflow response, and then combines this with the negative pressure control pump drive quantity to generate obstruction-type, leakage-type, or over-negative pressure-type results. Based on different verification classification results, it executes negative pressure slow-release control, proximal isolation control, flushing valve pulse control, intermittent drive control of unblocking actuators, negative pressure correction control, drainage recovery control, or equipment lockout control, thereby solving the technical problem that existing negative pressure drainage devices struggle to distinguish the causes of tubing abnormalities and match appropriate equipment intervention actions.

[0008] This invention discloses a method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology. The method is applied to a drainage control system, which includes a postoperative drainage tube, a collection container, a negative pressure control pump, a proximal isolation valve located at the inlet end of the postoperative drainage tube, a distal isolation valve located at the collection container, a drainage valve, a flushing valve, a flushing branch, a metering backflow branch, a clearing actuator, a parameter acquisition component, and a controller.

[0009] During drainage operation, the parameter acquisition component collects the inlet pressure value, outlet pressure value, drainage fluid flow rate, collection container negative pressure value, and negative pressure control pump drive quantity of the postoperative drainage tube, forming a pipeline operation data set;

[0010] When the pipeline operation data set meets the preset verification start conditions, the controller executes the isolation verification process. The isolation verification process includes: closing the flushing valve, controlling the remote isolation valve to close within the preset isolation time and collecting the negative pressure attenuation response, and controlling the metering back pumping branch to perform back pumping according to the preset back pumping volume and collecting the back pumping flow response.

[0011] The controller generates a verification classification result based on the negative pressure attenuation response, the backflow response, and the negative pressure control pump drive quantity. The verification classification result includes blockage type result, leakage type result, and over-negative pressure type result.

[0012] When the verification classification result is a blockage type, the negative pressure slow release control, proximal isolation control, flushing valve pulse control and unblocking actuator intermittent drive control are executed sequentially.

[0013] When the verification classification result is a leakage type or an excessive negative pressure type, negative pressure correction control is performed while keeping the flushing valve closed;

[0014] After completing the corresponding control, the pipeline operation data group is re-acquired, and the diversion restoration control or equipment interlock control is executed according to the re-acquired results. At the same time, the pipeline parameter abnormality warning signal is output.

[0015] Preferably, the preset verification start conditions include: the pressure difference between the inlet pressure value and the outlet pressure value is greater than a first pressure difference threshold and the flow rate of the drainage fluid is less than a first flow rate threshold; or, the negative pressure value of the collection container is less than a first negative pressure threshold and the driving amount of the negative pressure control pump is greater than a first driving amount threshold; or, the negative pressure value of the collection container is greater than a second negative pressure threshold and the flow rate of the drainage fluid is less than a second flow rate threshold.

[0016] Preferably, the acquisition of negative pressure attenuation response includes:

[0017] With the flushing valve closed, the proximal isolation valve open, and the distal isolation valve closed, adjust the negative pressure output value of the negative pressure control pump to the detected negative pressure value;

[0018] Continuously collect inlet and outlet pressure values ​​within a preset isolation time;

[0019] The absolute value of the difference between the outlet pressure value at the start time of the preset isolation duration and the outlet pressure value at the end time is taken as the negative pressure attenuation amount.

[0020] The negative pressure attenuation amount and the change in inlet pressure value within the preset isolation time are combined to form the negative pressure attenuation response.

[0021] Preferably, the process of collecting the aspiration flow response includes: connecting the metering aspiration branch to the postoperative drainage tube with the flushing valve closed, the proximal isolation valve closed, and the distal isolation valve open; controlling the metering aspiration branch to perform aspiration according to a preset aspiration volume; collecting the actual aspiration flow and pressure value of the metering aspiration branch; and combining the actual aspiration flow and pressure value of the aspiration branch into the aspiration flow response.

[0022] Preferably, generating the verification classification result includes: when the negative pressure attenuation is less than the first attenuation threshold, the actual backflow rate is less than the first backflow rate threshold, and the backflow branch pressure value is greater than the first backflow pressure threshold, the verification classification result is determined to be a blockage type result; when the negative pressure attenuation is greater than the second attenuation threshold, and the negative pressure control pump drive quantity is greater than the preset leakage drive quantity threshold, the verification classification result is determined to be a leakage type result; when the negative pressure value of the liquid collection container is greater than the preset over-negative pressure threshold, and the actual backflow rate is less than the second backflow rate threshold, the verification classification result is determined to be an over-negative pressure type result.

[0023] Preferably, when the verification classification result is a blockage type, the negative pressure slow-release control includes:

[0024] Adjust the negative pressure output value of the negative pressure control pump from the current negative pressure output value to the first slow-release negative pressure value; close the drainage valve;

[0025] After the negative pressure value of the liquid collection container enters the preset slow-release negative pressure range, the proximal isolation valve is closed; after the proximal isolation valve is closed, the flushing valve pulse control is activated.

[0026] Preferably, the flushing valve pulse control includes:

[0027] The flushing valve is opened and closed according to the first pulse cycle, so that the flushing branch outputs pulsed flushing fluid flow to the postoperative drainage tube;

[0028] The outlet pressure value is collected during each first pulse cycle;

[0029] When the outlet pressure exceeds the first pressure threshold, the flushing valve is closed and the flushing valve pulse control is stopped.

[0030] When the preset number of pulses is completed and the outlet pressure value is less than the second pressure threshold, the intermittent drive control of the unblocking actuator is activated.

[0031] Preferably, the intermittent drive control of the dredging actuator includes:

[0032] Control the flushing valve to be in the closed state, and drive the unblocking actuator while the flushing valve is in the closed state;

[0033] The driving duration of the dredging actuator is determined based on the pressure value of the backflow branch.

[0034] The driving interval of the dredging actuator is determined based on the actual backflow rate.

[0035] After completing the preset number of drives, the remote isolation valve is opened, and the inlet pressure value, outlet pressure value, and drainage fluid flow rate are collected again.

[0036] Preferably, when the verification classification result is a leakage result, the negative pressure correction control includes:

[0037] Keep the flush valve closed;

[0038] Adjust the drainage valve to the first detection opening degree;

[0039] The negative pressure control pump is controlled to operate according to the first detected drive quantity;

[0040] Collect the negative pressure value of the liquid collection container during the preset detection period;

[0041] When the negative pressure value of the liquid collection container is still less than the preset leakage detection negative pressure threshold, close the drainage valve and stop the negative pressure control pump.

[0042] Preferably, when the verification classification result is an overly negative pressure result, the negative pressure correction control includes:

[0043] Keep the flush valve closed and the proximal isolation valve open;

[0044] Adjust the negative pressure output value of the negative pressure control pump to the second slow-release negative pressure value;

[0045] Adjust the drainage valve to the second detection opening;

[0046] Collect the negative pressure value of the liquid collection container during the preset fall-off period;

[0047] When the negative pressure value of the liquid collection container does not enter the preset working negative pressure range, close the drainage valve and stop the negative pressure control pump.

[0048] Preferably, the drainage control system further includes an optical acquisition component, and the method further includes an optical verification control process, which includes:

[0049] When the drainage tube is not filled with fluid after surgery, the optical acquisition component collects the optical reference value of the empty tube.

[0050] After the flushing fluid is output from the flushing branch, the optical acquisition component collects the optical reference value of the flushing fluid.

[0051] The optical characteristic parameters of the drainage fluid are acquired by the optical acquisition component, and the optical characteristic parameters of the drainage fluid are corrected according to the optical reference value of the empty tube and the optical reference value of the flushing fluid.

[0052] When the corrected optical characteristic parameters of the drainage fluid meet the preset optical anomaly conditions, an abnormal optical verification result is generated.

[0053] When the corrected optical characteristic parameters of the drainage fluid do not meet the preset optical anomaly conditions, a normal optical verification result is generated.

[0054] Preferably, the controller performs branch control based on the abnormal optical verification results and the verification classification results:

[0055] When an abnormal optical verification result is generated and the verification classification result is a blocking result, flushing valve pulse control is executed after negative pressure slow release control and proximal isolation control are executed.

[0056] When an abnormal optical verification result is generated and the verification classification result is a leakage result or an over-negative pressure result, the flushing valve must not be opened and negative pressure correction control must not be executed.

[0057] When an abnormal optical verification result is generated and no blocking, leakage, or over-negative pressure result is obtained, the current negative pressure output value of the negative pressure control pump is maintained and an abnormal optical parameter warning signal is output.

[0058] Preferably, the controller executes an interlock control procedure, which includes:

[0059] The flushing valve must not be opened when the negative pressure value of the liquid collection container exceeds the preset negative pressure upper limit threshold.

[0060] While the flushing valve is open, it is forbidden to increase the negative pressure output value of the negative pressure control pump;

[0061] The flushing valve must not be opened while the proximal isolation valve is open and the distal isolation valve is closed.

[0062] During equipment interlock control, keep the proximal isolation valve, distal isolation valve, drain valve, and flush valve closed.

[0063] Preferably, the drainage recovery control includes:

[0064] After completing the corresponding control, open the remote isolation valve and the drainage valve;

[0065] Re-collect the inlet pressure value, outlet pressure value, drainage fluid flow rate, and negative pressure value of the collection container;

[0066] When the pressure difference between the re-acquired inlet pressure value and the outlet pressure value is less than the second pressure difference threshold, the flow rate of the drainage fluid is greater than the third flow rate threshold, and the negative pressure value of the collection container is within the preset working negative pressure range, the negative pressure output value of the negative pressure control pump is adjusted to the restored negative pressure value.

[0067] Maintain the data collection pipeline operation group during the recovery observation period;

[0068] When the preset verification start conditions are met again during the observation period, the equipment lockout control is executed.

[0069] Preferably, the equipment interlocking control includes:

[0070] Close the proximal isolation valve, distal isolation valve, drain valve, and flush valve;

[0071] Stop the negative pressure control pump and unclog the actuators;

[0072] Keep the metering backflow branch disconnected;

[0073] Set the abnormal pipeline parameter warning signal to a lockout state signal;

[0074] Before receiving the unlocking command, the controller is prohibited from starting the negative pressure control pump, opening the flushing valve, and driving the unblocking actuator.

[0075] Compared with existing technologies, the above technical solution has the following advantages:

[0076] 1. This invention collects inlet pressure, outlet pressure, drainage fluid flow rate, collection container negative pressure, and negative pressure control pump drive quantity during drainage operation, and executes an isolation verification process after meeting preset verification start conditions. This avoids relying solely on a single pressure threshold for anomaly judgment, and provides a clearer basis for equipment operating status in the drainage pipeline anomaly identification process.

[0077] 2. This invention generates a verification classification result by using negative pressure attenuation response, backflow flow response and negative pressure control pump drive quantity to classify pipeline anomalies into blockage type, leakage type and excessive negative pressure type results. This enables the execution of corresponding controls for different pipeline physical anomaly states, reducing the possibility of triggering flushing by mistakenly treating leakage anomalies or excessive negative pressure anomalies as blockage anomalies.

[0078] 3. When the verification classification result is a blockage type, the present invention sequentially executes negative pressure slow release control, proximal isolation control, flushing valve pulse control, and intermittent drive control of the unblocking actuator, so that the flushing fluid flow and unblocking action act on the pipeline section to be treated, which is conducive to restoring the patency of the postoperative drainage tube and reducing the risk of ineffective treatment caused by continuous flushing or single alarm processing.

[0079] 4. When the verification and classification results are leakage type or excessive negative pressure type, the present invention keeps the flushing valve closed and performs negative pressure correction control. At the same time, in conjunction with the interlock control process, it can avoid control conflicts between flushing action, negative pressure adjustment action and isolation test action, and improve the operational safety and stability of the drainage control system under abnormal conditions.

[0080] 5. This invention, through the associated output of drainage recovery control, equipment interlock control, optical verification control process, and abnormal pipeline parameter warning signals, can continuously provide equipment status reference information for medical staff to observe the postoperative drainage status and complication risk by continuously monitoring the operation status of postoperative drainage tubes, collection containers, negative pressure control pumps, and related valves at the equipment level. Attached Figure Description

[0081] Figure 1 This is a schematic diagram of the fluid circuit structure of the drainage control system provided in an embodiment of the present invention;

[0082] Figure 2 This is the main control flowchart of the intelligent monitoring and complication early warning method for postoperative drainage tubes in urology provided in this embodiment of the invention;

[0083] Figure 3 The isolation review process and review classification judgment flowchart provided in the embodiments of the present invention;

[0084] Figure 4 The flowchart of negative pressure slow release, pulse flushing and intermittent unblocking control corresponding to the blockage result provided in the embodiment of the present invention;

[0085] Figure 5 This is a flowchart of the negative pressure correction control corresponding to the leakage type result and the over-negative pressure type result provided in the embodiments of the present invention;

[0086] Figure 6 The flowchart of optical verification control and interlock control provided in the embodiments of the present invention;

[0087] Figure 7 Pressure-time and flow-time response curves for the isolation and review period under three typical fault conditions provided in this embodiment of the invention;

[0088] Figure 8 The negative pressure output timing waveform diagram is provided for the pulse flushing and intermittent dredging process in the embodiment of the present invention.

[0089] Explanation of reference numerals in the attached figures:

[0090] 1 is the postoperative drainage tube; 2 is the collection container; 3 is the negative pressure control pump; 4 is the proximal isolation valve; 5 is the distal isolation valve; 6 is the drainage valve; 7 is the flushing valve; 8 is the flushing branch; 9 is the metering backflow branch; 10 is the unblocking actuator; 11 is the parameter acquisition component; 12 is the controller; 13 is the optical acquisition component. Detailed Implementation

[0091] The following description, in conjunction with the accompanying drawings, further illustrates the method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology. The following embodiments are used to illustrate the technical solution of this application and do not constitute a limitation on the scope of protection. Without departing from the technical concept of this application, those skilled in the art can make equivalent substitutions for valve type, sensor arrangement, threshold range, and actuator form.

[0092] like Figure 1As shown, the method in this embodiment is applied to a drainage control system. This drainage control system includes a postoperative drainage tube 1, a collection container 2, a negative pressure control pump 3, a proximal isolation valve 4, a distal isolation valve 5, a drainage valve 6, a flushing valve 7, a flushing branch 8, a metering aspiration branch 9, a drainage actuator 10, a parameter acquisition component 11, a controller 12, and an optical acquisition component 13. The postoperative drainage tube 1 is used to connect to the indwelling drainage site after urological surgery. The collection container 2 is used to collect the fluid drained from the postoperative drainage tube 1. The negative pressure control pump 3 is connected to the collection container 2 and is used to create an adjustable negative pressure within the collection container 2. The proximal isolation valve 4 is located at the inlet end of the postoperative drainage tube 1, the distal isolation valve 5 is located on the side near the collection container 2, and the drainage valve 6 is located on the main drainage path between the postoperative drainage tube 1 and the collection container 2. The flushing branch 8 is connected to the postoperative drainage tube 1 through the flushing valve 7, and the metering aspiration branch 9 is connected to the section of tubing between the proximal isolation valve 4 and the distal isolation valve 5. The unblocking actuator 10 is arranged on the outside of the postoperative drainage tube 1 and is used to perform intermittent squeezing or vibration on the postoperative drainage tube 1. Figure 1 The connection relationships of the components are mainly shown by the attached diagrams, and the names of the relevant components are as described in this paragraph.

[0093] The parameter acquisition component 11 includes an inlet pressure sensor, an outlet pressure sensor, a flow sensor, a negative pressure sensor for the collection container, and a negative pressure control pump drive quantity acquisition module. The inlet pressure sensor is located on the side near the inlet end of the postoperative drainage tube 1, the outlet pressure sensor is located on the side near the collection container 2, the flow sensor is located on the main drainage path of the postoperative drainage tube 1, and the negative pressure sensor for the collection container is located on the negative pressure chamber of the collection container 2. The negative pressure control pump drive quantity can be one or more of the following: the drive duty cycle of the negative pressure control pump 3, the motor speed, or the drive current. In this embodiment, the drive duty cycle is used as the negative pressure control pump drive quantity.

[0094] In this embodiment, the raw pressure value collected by the pressure sensor can be a pressure value with a positive or negative sign. To facilitate threshold comparison, the controller 12 converts the raw pressure value collected by the negative pressure sensor of the liquid collection container into a negative pressure value of the liquid collection container, which is expressed as a negative pressure amplitude in kPa. For example, when the raw pressure value collected by the negative pressure sensor of the liquid collection container is -10 kPa, the negative pressure value of the liquid collection container used by the controller 12 for comparison is 10 kPa. Unless otherwise specified, in this embodiment, threshold comparisons related to the negative pressure value of the liquid collection container are all based on negative pressure amplitude comparisons.

[0095] The metering aspiration branch 9 includes a metering chamber, an aspiration drive, an aspiration branch pressure sensor, an aspiration flow sensor, and a one-way valve. The metering aspiration branch 9 connects to the pipeline section between the proximal isolation valve 4 and the distal isolation valve 5 via a three-way connector. The one-way valve restricts the flow of fluid during aspiration testing to only the direction from the postoperative drainage tube 1 to the metering aspiration branch 9 into the metering chamber. The single aspiration volume of the metering chamber can be set from 2 mL to 20 mL, for example, 10 mL. The unblocking actuator 10 can be a mechanical squeezing push rod, a flexible compression wheel, a piezoelectric vibrator, or a pneumatic squeezing device. In this embodiment, a miniature squeezing push rod arranged along the outer wall of the postoperative drainage tube 1 is used.

[0096] like Figure 2 As shown, the method in this embodiment includes system initialization, pipeline operation data acquisition, verification start judgment, isolation verification, verification classification, classification control, drainage recovery or equipment interlocking, and parameter abnormality early warning output. During system initialization, the controller 12 first detects the opening and closing status of the proximal isolation valve 4, the distal isolation valve 5, the drainage valve 6, and the flushing valve 7, and confirms that the negative pressure control pump 3, the parameter acquisition component 11, the metering backflow branch 9, and the unblocking actuator 10 are in a controllable state. During normal drainage operation, the proximal isolation valve 4, the distal isolation valve 5, and the drainage valve 6 remain open, the flushing valve 7 remains closed, and the negative pressure control pump 3 operates according to the set negative pressure range. The set negative pressure range can be a negative pressure amplitude of 6 kPa to 15 kPa, for example, a negative pressure amplitude of 8 kPa to 12 kPa.

[0097] During drainage operation, the parameter acquisition component 11 collects the inlet and outlet pressure values, drainage fluid flow rate, collection container negative pressure value, and negative pressure control pump drive quantity of the postoperative drainage tube 1 according to a preset sampling period, forming a pipeline operation data set. The preset sampling period can be from 0.2s to 5s, for example, 1s. Each pipeline operation data set includes the inlet and outlet pressure values, drainage fluid flow rate, collection container negative pressure value, and negative pressure control pump drive quantity at the same sampling time, thereby avoiding misjudgment caused by mixing data from different time points. The acquisition range of the inlet and outlet pressure values ​​can be from -30kPa to 30kPa, and the acquisition range of the drainage fluid flow rate can be from 0mL / min to 200mL / min.

[0098] Controller 12 determines whether the pipeline operating data set meets the preset verification start-up conditions based on the pressure difference between the inlet and outlet pressure values, the negative pressure value of the collection container, the drive quantity of the negative pressure control pump, and the flow rate of the drainage fluid. The pressure difference is calculated using the following formula:

[0099]

[0100] in, This represents the pressure difference between the inlet and outlet pressure values, expressed in kPa. This indicates the inlet pressure value, in kPa. This indicates the outlet pressure value, in kPa. The above symbols are only used in the definition of pressure difference in this calculation formula; the corresponding parameters will be described in their full technical names thereafter.

[0101] The preset verification start conditions include any of the following: the pressure difference between the inlet and outlet pressure values ​​is greater than a first pressure difference threshold and the drainage fluid flow rate is less than a first flow rate threshold; the negative pressure value of the collection container is less than a first negative pressure threshold and the negative pressure control pump drive quantity is greater than a first drive quantity threshold; the negative pressure value of the collection container is greater than a second negative pressure threshold and the drainage fluid flow rate is less than a second flow rate threshold. The first pressure difference threshold can be set to 3 kPa to 8 kPa, for example, 5 kPa; the first flow rate threshold can be set to 3 mL / min to 15 mL / min, for example, 8 mL / min; the first negative pressure threshold can be set to a negative pressure amplitude of 4 kPa to 7 kPa, for example, 5 kPa; the first drive quantity threshold can be set to a drive duty cycle of 70% to 90%, for example, 80%; the second negative pressure threshold can be set to a negative pressure amplitude of 15 kPa to 22 kPa, for example, 18 kPa; the second flow rate threshold can be set to 3 mL / min to 12 mL / min, for example, 6 mL / min. The aforementioned thresholds are determined based on the inner diameter and length of the postoperative drainage tube 1, the viscosity of the drainage fluid, the volume of the collection container 2, and the rated suction capacity of the negative pressure control pump 3. During the factory calibration of the equipment, the corresponding parameter groups can be determined and stored in the controller 12 by injecting a simulated drainage fluid of known viscosity into the postoperative drainage tube 1 and setting different degrees of blockage, leakage, and excessive negative pressure conditions.

[0102] When the pipeline operation data set meets the preset verification start conditions, controller 12 executes the isolation verification process. The isolation verification process includes two consecutive equipment testing phases. The first phase is the negative pressure attenuation test phase, in which controller 12 closes flush valve 7 and controls remote isolation valve 5 to close within a preset isolation time to form a local negative pressure maintenance state, and then collects the negative pressure attenuation response. The second phase is the metering backflow test phase, in which controller 12 controls metering backflow branch 9 to perform backflow according to a preset backflow volume and collects the backflow flow response. The preset isolation time can be from 5s to 30s, for example, 10s; the preset backflow volume can be from 2mL to 20mL, for example, 10mL.

[0103] like Figure 3As shown, when acquiring the negative pressure attenuation response, the flushing valve 7 remains closed, the near-end isolation valve 4 remains open, the far-end isolation valve 5 remains closed, and the negative pressure output value of the negative pressure control pump 3 is adjusted to the detected negative pressure value. The detected negative pressure value can be a negative pressure amplitude of 8 kPa to 14 kPa, for example, 10 kPa. Within the preset isolation time, the parameter acquisition component 11 continuously acquires the inlet pressure value and the outlet pressure value. The controller 12 uses the absolute value of the difference between the outlet pressure value corresponding to the start time of the preset isolation time and the outlet pressure value corresponding to the end time as the negative pressure attenuation amount, which is expressed by the following formula:

[0104]

[0105] in, This indicates the amount of negative pressure attenuation, in kPa. This indicates the outlet pressure value corresponding to the start time of the preset isolation duration, in kPa. This represents the outlet pressure value at the end of the preset isolation period, in kPa. The negative pressure attenuation response is formed by the combination of the negative pressure attenuation and the change in inlet pressure during the preset isolation period. The change in inlet pressure reflects the pressure fluctuation near the inlet of the postoperative drainage tube 1, while the negative pressure attenuation reflects the pressure-holding capacity of the local tube segment after the distal isolation valve 5 is closed.

[0106] When collecting the aspiration flow response, flushing valve 7 remains closed, proximal isolation valve 4 is closed, and distal isolation valve 5 is open, connecting the metering aspiration branch 9 to the postoperative drainage tube 1. Controller 12 controls the metering aspiration branch 9 to perform aspiration according to a preset aspiration volume, and collects the actual aspiration flow rate and pressure value of the metering aspiration branch 9. In this embodiment, the actual aspiration flow rate is the volume of liquid entering the metering aspiration branch 9 per unit time, and can be calculated from the volume change rate during the aspiration process. When the actual aspiration flow rate is expressed in mL / 10s, the calculation formula is as follows:

[0107]

[0108] in, This indicates the actual backflow rate, expressed in mL / 10s. This indicates the actual volume of liquid entering the metering chamber during the measurement period, in mL. The measurement time is expressed in seconds (s). Controller 12 combines the calculated actual backflow rate with the backflow branch pressure value collected by the sensor to form the backflow rate response. If mL / s is used as the actual backflow rate unit, controller 12 can divide the actual liquid volume by the measurement time to obtain the corresponding actual backflow rate, and compare it with the threshold parameters using the same unit.

[0109] If the actual backflow rate is significantly lower than the flow threshold corresponding to the preset backflow volume, and the pressure value of the backflow branch increases, it indicates that the backflow path is blocked. If the negative pressure attenuation increases rapidly after the remote isolation valve 5 is closed, it indicates that the pressure holding capacity of the local pipe section has decreased and there is a possibility of leakage. If the negative pressure value of the liquid collection container is consistently higher than the normal operating negative pressure range and the actual backflow rate is low, it indicates that there is a risk of excessive negative pressure adsorption or abnormal negative pressure output.

[0110] The controller 12 generates a verification classification result based on the negative pressure attenuation response, the return flow response, and the negative pressure control pump drive quantity. The verification classification result includes obstruction type, leakage type, and excessive negative pressure type results. When the negative pressure attenuation is less than the first attenuation threshold, the actual return flow is less than the first return flow threshold, and the return branch pressure value is greater than the first return pressure threshold, the verification classification result is determined to be an obstruction type result. The first attenuation threshold can be from 0.5 kPa / 10s to 3 kPa / 10s, for example, 2 kPa / 10s; the first return flow threshold can be from 2 mL / 10s to 8 mL / 10s, for example, 5 mL / 10s; and the first return pressure threshold can be from 5 kPa to 15 kPa, for example, 10 kPa. The equipment state corresponding to this classification is: the pipeline can still maintain negative pressure locally, but the flow is limited during return and the return branch pressure value increases, indicating that there are blood clots, tissue debris, or fluid passage obstruction caused by bending and compression in the pipeline.

[0111] When the negative pressure attenuation exceeds the second attenuation threshold and the negative pressure control pump drive exceeds the preset leakage drive threshold, the verification classification result is determined to be a leakage result. The second attenuation threshold can be from 4 kPa / 10s to 10 kPa / 10s, for example, 6 kPa / 10s; the preset leakage drive threshold can be a drive duty cycle of 70% to 95%, for example, 80%. The equipment status corresponding to this classification is: the negative pressure control pump 3 is already in a high drive state, but it is difficult to maintain negative pressure in some pipe sections, indicating that there may be air leakage at the pipe interface, liquid collection container seal, or connection joint.

[0112] When the negative pressure value of the collection container exceeds the preset negative pressure threshold and the actual aspiration flow rate is less than the second aspiration flow rate threshold, the verification classification result is determined to be an excessive negative pressure result. In this embodiment, the negative pressure value of the collection container is expressed as the negative pressure amplitude. The preset negative pressure threshold can be from 15 kPa to 22 kPa, for example, 18 kPa; the second aspiration flow rate threshold can be from 3 mL / 10 s to 10 mL / 10 s, for example, 6 mL / 10 s. The equipment status corresponding to this classification is: the negative pressure effect is too strong and the aspiration flow rate is limited, which may result in the end of the postoperative drainage tube 1 adhering to tissue, the drainage fluid being locally absorbed and blocked, or the negative pressure control of the collection container 2 being abnormal.

[0113] The negative pressure value of the liquid collection container can be obtained by converting the original pressure value. The conversion calculation formula is as follows:

[0114]

[0115] in, This indicates the negative pressure value of the liquid collection container, in kPa. This represents the original pressure value of the liquid collection container, in kPa. This formula is only used to illustrate the conversion method of negative pressure amplitude; the relevant parameters will still be referred to by their full technical names in the following text.

[0116] like Figure 4 As shown, when the verification classification result is a blockage type, the controller 12 sequentially executes negative pressure slow-release control, proximal isolation control, flushing valve pulse control, and intermittent drive control of the unblocking actuator. When executing negative pressure slow-release control, the controller 12 adjusts the negative pressure output value of the negative pressure control pump 3 from the current negative pressure output value to a first slow-release negative pressure value. The first slow-release negative pressure value can be a negative pressure amplitude of 3 kPa to 8 kPa, for example, 5 kPa. Subsequently, the controller 12 closes the drainage valve 6 and closes the proximal isolation valve 4 after the negative pressure value in the collection container enters the preset slow-release negative pressure range. The preset slow-release negative pressure range can be a negative pressure amplitude of 3 kPa to 8 kPa. After the proximal isolation valve 4 is closed, the controller 12 initiates the flushing valve pulse control. By first reducing the negative pressure and then closing the drainage valve 6 and the proximal isolation valve 4, the situation where the flushing fluid is directly drawn into the collection container 2 by negative pressure can be reduced, allowing the flushing fluid to act on the locally blocked section.

[0117] The flushing valve pulse control includes controlling the opening and closing of the flushing valve 7 according to a first pulse cycle, so that the flushing branch 8 outputs a pulsed flushing fluid flow to the postoperative drainage tube 1. In this embodiment, the first pulse cycle can be 1s to 5s, for example, 3s; the flushing valve 7 is open for 0.3s to 1.5s within each first pulse cycle, for example, 0.8s; the volume of a single pulse flushing fluid can be 2mL to 20mL, for example, 10mL. The controller 12 collects the outlet pressure value within each first pulse cycle. When the outlet pressure value is greater than a first pressure threshold, the flushing valve 7 is closed and the flushing valve pulse control is stopped; the first pressure threshold can be 10kPa to 20kPa, for example, 15kPa. When the preset number of pulses is completed and the outlet pressure value is less than a second pressure threshold, the intermittent drive control of the unblocking actuator is activated; the second pressure threshold can be 3kPa to 10kPa, for example, 6kPa. The preset number of pulses can be 2 to 8 times, for example, 4 times.

[0118] The intermittent drive control of the unblocking actuator includes controlling the flushing valve 7 to be in the closed state and driving the unblocking actuator 10 during the closed state of the flushing valve 7. The controller 12 determines the driving duration of the unblocking actuator 10 based on the backflow branch pressure value and the driving interval of the unblocking actuator 10 based on the actual backflow flow rate. In this embodiment, when the backflow branch pressure value is 5 kPa to 10 kPa, the driving duration is 0.5 s to 1 s; when the backflow branch pressure value is greater than 10 kPa, the driving duration is 1 s to 2 s. When the actual backflow flow rate is less than 5 mL / 10 s, the driving interval is 1 s to 2 s; when the actual backflow flow rate is 5 mL / 10 s to 10 mL / 10 s, the driving interval is 2 s to 4 s. After completing the preset number of drives, the controller 12 opens the remote isolation valve 5 and re-collects the inlet pressure value, outlet pressure value, and drainage fluid flow rate. The preset number of drives can be from 2 to 10, for example, 5.

[0119] like Figure 5 As shown, when the verification classification result is a leakage result, the controller 12 performs negative pressure correction control. Specifically, the controller 12 keeps the flushing valve 7 closed, adjusts the drainage valve 6 to the first detection opening, controls the negative pressure control pump 3 to run according to the first detection drive quantity, and collects the negative pressure value of the collection container within a preset detection period. The first detection opening can be 20% to 60% of the maximum opening of the drainage valve 6, for example, 40%; the first detection drive quantity can be 50% to 80% of the rated drive quantity of the negative pressure control pump 3, for example, 60%; the preset detection period can be 5s to 30s, for example, 10s. When the negative pressure value of the collection container is still less than the preset leakage judgment negative pressure threshold, the drainage valve 6 is closed and the negative pressure control pump 3 is stopped. The preset leakage judgment negative pressure threshold can be a negative pressure amplitude of 3kPa to 8kPa, for example, 5kPa. By performing negative pressure correction with the flushing valve 7 closed, it is possible to avoid mistakenly treating the leakage state as a blockage state and starting flushing.

[0120] When the verification classification result is an over-negative pressure result, the controller 12 performs negative pressure correction control. Specifically, the controller 12 keeps the flushing valve 7 closed and the proximal isolation valve 4 open, adjusts the negative pressure output value of the negative pressure control pump 3 to the second slow-release negative pressure value, and adjusts the drainage valve 6 to the second detection opening degree, collecting the negative pressure value of the collection container within a preset fall-off period. The second slow-release negative pressure value can be a negative pressure amplitude of 4 kPa to 10 kPa, for example, 6 kPa; the second detection opening degree can be 30% to 70% of the maximum opening degree of the drainage valve 6, for example, 50%; the preset fall-off period can be 5s to 30s, for example, 12s. When the negative pressure value of the collection container does not enter the preset working negative pressure range, the drainage valve 6 is closed and the negative pressure control pump 3 is stopped. The preset working negative pressure range can be a negative pressure amplitude of 6 kPa to 15 kPa, for example, 8 kPa to 12 kPa.

[0121] like Figure 6 As shown, in one specific embodiment, the drainage control system further includes an optical acquisition component 13, and the method further includes an optical verification control process. The optical verification control process includes: when the drainage tube 1 is in a non-fluid-filled state after surgery, the optical acquisition component 13 acquires the optical reference value of the empty tube; after the irrigation fluid flow is output from the irrigation branch 8, the optical acquisition component 13 acquires the optical reference value of the irrigation fluid; the optical acquisition component 13 acquires the optical characteristic parameters of the drainage fluid, and corrects the optical characteristic parameters of the drainage fluid according to the optical reference value of the empty tube and the optical reference value of the irrigation fluid. The optical characteristic parameters of the drainage fluid may include one or more of transmittance, reflectance chromaticity value, and turbidity value. In this embodiment, transmittance and turbidity value are used as the optical characteristic parameters of the drainage fluid.

[0122] Transmittance correction can be calculated using the following formula:

[0123]

[0124] in, Indicates corrected transmittance; This represents the measured transmittance of the drainage fluid; Indicates the optical reference value of the air tube; This represents the optical reference value of the flushing fluid. The above calculation formula is used to eliminate the effects of pipe wall contamination, light source attenuation, and the optical properties of the flushing fluid itself. When the corrected optical characteristic parameters of the drainage fluid meet the preset optical anomaly conditions, an abnormal optical verification result is generated; when the corrected optical characteristic parameters of the drainage fluid do not meet the preset optical anomaly conditions, a normal optical verification result is generated. The preset optical anomaly conditions can be that the corrected transmittance is less than 0.45 and the turbidity value is greater than 80 NTU, or the reflectance chromaticity value is within the preset red range and the transmittance decreases by more than 30%. The abnormal optical verification result is only used for equipment status indication and equipment branch control, and does not directly output disease diagnosis conclusions.

[0125] Controller 12 executes branch control based on the abnormal optical verification results and verification classification results. When an abnormal optical verification result is generated and the verification classification result is a blockage result, flushing valve pulse control is executed after executing negative pressure slow-release control and proximal isolation control. When an abnormal optical verification result is generated and the verification classification result is a leakage result or an over-negative pressure result, flushing valve 7 is prohibited from opening and negative pressure correction control is executed. When an abnormal optical verification result is generated but no blockage result, leakage result, or over-negative pressure result is obtained, the current negative pressure output value of negative pressure control pump 3 is maintained and an optical parameter abnormality warning signal is output. This optical parameter abnormality warning signal is a device status indication signal, used to indicate abnormal changes in the optical parameters of the drainage fluid, and does not directly output disease diagnosis results.

[0126] This embodiment also includes an interlock control procedure. The interlock control procedure includes: prohibiting the opening of flushing valve 7 when the negative pressure value of the collection container exceeds a preset negative pressure upper limit threshold; prohibiting the increase of the negative pressure output value of the negative pressure control pump 3 while flushing valve 7 is open; prohibiting the opening of flushing valve 7 while the proximal isolation valve 4 is open and the distal isolation valve 5 is closed; and keeping the proximal isolation valve 4, distal isolation valve 5, drainage valve 6, and flushing valve 7 closed during equipment lockout control. The preset negative pressure upper limit threshold can be a negative pressure amplitude of 15 kPa to 22 kPa, for example, 18 kPa. The above interlock control procedure is used to ensure that there is no conflict between negative pressure control, flushing action, isolation test, and lockout protection.

[0127] After completing the corresponding control, controller 12 executes drainage recovery control. Drainage recovery control includes: opening the remote isolation valve 5 and drainage valve 6, and re-acquiring the inlet pressure value, outlet pressure value, drainage fluid flow rate, and collection container negative pressure value. When the pressure difference between the re-acquired inlet pressure value and outlet pressure value is less than the second pressure difference threshold, the drainage fluid flow rate is greater than the third flow rate threshold, and the collection container negative pressure value is within the preset working negative pressure range, the negative pressure output value of the negative pressure control pump 3 is adjusted to the recovery negative pressure value. The second pressure difference threshold can be 1 kPa to 4 kPa, for example, 2 kPa; the third flow rate threshold can be 10 mL / min to 30 mL / min, for example, 15 mL / min; the recovery negative pressure value can be a negative pressure amplitude of 8 kPa to 12 kPa, for example, 10 kPa. During the recovery observation period, controller 12 maintains the acquisition of pipeline operation data sets; the recovery observation period can be 30 s to 180 s, for example, 60 s. When the preset verification start conditions are met again during the observation period, the controller 12 executes the equipment lockout control.

[0128] The equipment interlock control includes closing the proximal isolation valve 4, the distal isolation valve 5, the drainage valve 6, and the flushing valve 7; stopping the negative pressure control pump 3 and the unblocking actuator 10; maintaining the metering backflow branch 9 in the disconnected state; and setting the pipeline parameter abnormality warning signal as the interlock status signal. Before receiving the interlock release command, the controller 12 prohibits starting the negative pressure control pump 3, opening the flushing valve 7, and driving the unblocking actuator 10. The interlock release command can be input by medical personnel through the human-machine interface of the controller 12; in one embodiment, the controller 12 only accepts the interlock release command after confirming that the proximal isolation valve 4, the distal isolation valve 5, the drainage valve 6, and the flushing valve 7 are in an initial safe state. The interlock status signal includes an anomaly type identifier, interlock trigger time, the most recent pipeline operation data set, the most recent review classification result, and the actuator status.

[0129] Figure 7 The graphs show the response curves during the isolation and verification period under three typical fault conditions. Figure 7In the graph, the horizontal axis represents time (seconds); the left vertical axis represents pressure (kPa); and the right vertical axis represents the actual backflow rate (mL / 10s). Under blocked conditions, after the remote isolation valve 5 closes, the local pipe section maintains a near-negative pressure, with a negative pressure decrease of approximately 1.2 kPa within 10 seconds, an actual backflow rate of approximately 3.5 mL / 10s, and a backflow branch pressure of approximately 12 kPa. Under leaking conditions, after the remote isolation valve 5 closes, the negative pressure in the local pipe section decreases rapidly, with a decrease of approximately 7.5 kPa within 10 seconds, and the negative pressure control pump drive rate is approximately 85%. Under over-negative pressure conditions, the negative pressure in the collection container is approximately 20 kPa, the actual backflow rate is approximately 4.8 mL / 10s, and the negative pressure decrease is approximately 2.5 kPa.

[0130] Figure 8 The waveform diagram shows the negative pressure output timing for pulse flushing and intermittent dredging. Figure 8 In the diagram, the horizontal axis represents time in seconds (s); the vertical axis represents the opening and closing state of flushing valve 7, the outlet pressure value, and the driving state of unblocking actuator 10, respectively. Within a control cycle of 0s to 12s, flushing valve 7 opens once every 3s, with each opening lasting 0.8s; the outlet pressure value reaches a peak when flushing valve 7 opens and then drops back down after flushing valve 7 closes; unblocking actuator 10 operates within the pressure drop range after flushing valve 7 closes.

[0131] To verify the effectiveness of the control method in this embodiment, an external drainage simulation test platform was constructed. The test platform included a simulated postoperative drainage tube with an inner diameter of 4 mm and a length of 800 mm, a simulated collection container with a volume of 1000 mL, an adjustable negative pressure control pump, a simulated flushing branch, a simulated metering aspiration branch, and simulated unblocking actuators. The simulated drainage fluid was prepared using water, glycerol, and a small amount of red dye, with a dynamic viscosity of [missing value]. The blockage condition is formed by adding a simulated blood clot with a diameter of 3 mm to 5 mm into the pipeline; the leakage condition is formed by setting a micro-leakage hole at the pipeline joint with a flow rate of 5 mL / min to 15 mL / min; the over-negative pressure condition is formed by adjusting the negative pressure output value of the negative pressure control pump 3 to a negative pressure amplitude of 18 kPa to 22 kPa and attaching a flexible membrane to the end of the pipeline.

[0132] The test set the first attenuation threshold to 2 kPa / 10s, the second attenuation threshold to 6 kPa / 10s, the first backflow rate threshold to 5 mL / 10s, the second backflow rate threshold to 6 mL / 10s, the first backflow pressure threshold to 10 kPa, the preset leakage drive threshold to an 80% drive duty cycle, and the preset negative pressure threshold to a negative pressure amplitude of 18 kPa. Each operating condition was tested 100 times. The classification accuracy was calculated as the ratio of the number of times the correct output corresponded to the verification classification result to the total number of tests for the corresponding operating condition; the invalid flushing trigger rate was calculated as the ratio of the number of times the flushing valve pulse control was activated under non-blocking conditions to the total number of tests under non-blocking conditions. A comparative control method using a single pressure threshold alarm and triggering cleaning was used, and the results are shown in Table 1 below.

[0133] Table 1 Comparison of Test Items

[0134] Accuracy of classification for obstructed working conditions 76% 98% Leakage type classification accuracy 61% 96% Accuracy of parting under negative pressure conditions 58% 95% Ineffective flushing trigger rate 32% 5% Mean recovery time under congestion conditions 185s 45s The proportion of leak conditions misjudged as blockage 29% 3% Equipment interlock trigger accuracy 80% 97%

[0135] As can be seen from the above in vitro simulation test results, under the same pipeline, the same simulated drainage fluid, and the same negative pressure control pump conditions, this embodiment, by triggering the isolation verification process through the pipeline operation data group, and then generating verification classification results based on the negative pressure attenuation response, the backflow response, and the negative pressure control pump drive quantity, can reduce the probability of leakage-type and excessive negative pressure-type operating conditions being misjudged as blockage-type operating conditions, and reduce unnecessary flushing actions. For blockage-type operating conditions, the sequential coordination of negative pressure slow-release control, proximal isolation control, flushing valve pulse control, and intermittent drive control of the unblocking actuator can shorten the time for the pipeline to return to the normal flow rate range. The above tests are in vitro equipment bench tests used to verify the ability of the drainage equipment operation control method to identify and handle the physical state of the pipeline, and do not constitute a diagnosis of human disease conditions.

[0136] In another embodiment, the inner diameter of the postoperative drainage tube 1 can be 3mm to 8mm, and the preset aspiration volume can be adjusted according to the inner diameter and length of the postoperative drainage tube 1. When the inner diameter of the postoperative drainage tube 1 increases, the first aspiration flow rate threshold and the second aspiration flow rate threshold can be increased accordingly; when the length of the postoperative drainage tube 1 increases, the first pressure difference threshold and the second pressure difference threshold can be increased accordingly. The threshold adjustments can be stored in the controller 12 in the form of a parameter table, and medical staff or maintenance personnel can select the corresponding parameter group according to the specifications of the postoperative drainage tube 1.

[0137] In another embodiment, the unblocking actuator 10 employs a flexible airbag-type compression member. The flexible airbag-type compression member is fitted along the outer wall of the postoperative drainage tube 1 and forms external pressure through periodic inflation and deflation by a micro-pump. The controller 12 determines the inflation duration of the flexible airbag-type compression member based on the pressure value of the return branch and the deflation interval based on the actual return flow rate. This embodiment is consistent with the control logic of the mechanical compression push rod, both belonging to the intermittent drive control of the unblocking actuator.

[0138] In another embodiment, the optical acquisition component 13 is disposed outside the transparent detection window. The transparent detection window is located on the main drainage path of the postoperative drainage tube 1. The optical acquisition component 13 includes a light-emitting unit and a receiving unit. The light-emitting unit emits detection light with a wavelength of 520nm to 660nm, and the receiving unit collects the transmitted light intensity or reflected light intensity. The empty tube optical reference value is used to characterize the optical state when no liquid passes through the transparent detection window, the irrigation fluid optical reference value is used to characterize the optical state when the irrigation fluid flows through the transparent detection window, and the drainage fluid optical characteristic parameters are used to characterize the optical state when the drainage fluid passes through the transparent detection window. The optical verification control process is only used to output abnormal optical parameter warning signals or participate in equipment branch control, and does not directly output disease diagnosis conclusions.

[0139] In this embodiment, the pipeline parameter abnormality warning signal may include the verification classification result, the current pipeline operation data group, the actuator status, the drainage recovery control status, and the equipment lockout control status. The controller 12 can display the pipeline parameter abnormality warning signal on the human-machine interface, or send it to the nurse station or ward monitoring terminal. The pipeline parameter abnormality warning signal is used to indicate abnormal operating status of the postoperative drainage tube 1, the collection container 2, the negative pressure control pump 3, and related valves, providing medical staff with equipment status information to observe the postoperative drainage status and complication risk.

[0140] Through the above implementation method, this embodiment limits postoperative drainage tube abnormalities in urology to equipment-level tube operation abnormalities, defines abnormality identification as blockage, leakage, and excessive negative pressure, and limits warning signals to abnormal tube parameter warning signals. This method focuses on the fluid control and execution actions between the postoperative drainage tube 1, collection container 2, negative pressure control pump 3, valves, flushing branch 8, metering backflow branch 9, and unblocking actuator 10, directly affecting the operation and control process of the medical drainage equipment, and belongs to the field of medical fluid control and drainage equipment technology.

[0141] It should be noted that the embodiments of the present invention have better implementability and are not intended to limit the present invention in any way. Any person skilled in the art may use the above-disclosed technical content to change or modify it into equivalent effective embodiments. However, any modifications or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology, the method being applied to a drainage control system, the drainage control system comprising a postoperative drainage tube, a collection container, a negative pressure control pump, a proximal isolation valve located at the inlet end of the postoperative drainage tube, a distal isolation valve located at the collection container, a drainage valve, a flushing valve, a flushing branch, a metering backflow branch, a patency control actuator, a parameter acquisition component, and a controller; characterized in that, include: During drainage operation, the parameter acquisition component collects the inlet pressure value, outlet pressure value, drainage fluid flow rate, collection container negative pressure value, and negative pressure control pump drive quantity of the postoperative drainage tube to form a pipeline operation data set. When the pipeline operation data group meets the preset verification start conditions, the controller executes the isolation verification process, which includes: closing the flushing valve, controlling the remote isolation valve to close within a preset isolation time and collecting the negative pressure attenuation response, and controlling the metering back pumping branch to perform back pumping according to a preset back pumping volume and collecting the back pumping flow response. The controller generates a verification classification result based on the negative pressure attenuation response, the backflow response, and the negative pressure control pump drive quantity. The verification classification result includes blockage type result, leakage type result, and over-negative pressure type result. When the verification classification result is the blockage result, the negative pressure slow release control, proximal isolation control, flushing valve pulse control and unblocking actuator intermittent drive control are executed sequentially. When the verification classification result is the leakage type result or the excessive negative pressure type result, negative pressure correction control is performed while keeping the flushing valve closed; After completing the corresponding control, the pipeline operation data group is re-acquired, and the diversion recovery control or equipment lockout control is executed according to the re-acquisition results. At the same time, the pipeline parameter abnormality warning signal is output.

2. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 1, characterized in that, The preset verification start conditions include: the pressure difference between the inlet pressure value and the outlet pressure value is greater than a first pressure difference threshold and the flow rate of the drainage fluid is less than a first flow rate threshold; or, the negative pressure value of the collection container is less than a first negative pressure threshold and the driving amount of the negative pressure control pump is greater than a first driving amount threshold; or, the negative pressure value of the collection container is greater than a second negative pressure threshold and the flow rate of the drainage fluid is less than a second flow rate threshold.

3. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 1, characterized in that, The acquisition of the negative pressure attenuation response includes: With the flushing valve closed, the proximal isolation valve open, and the distal isolation valve closed, the negative pressure output value of the negative pressure control pump is adjusted to the detected negative pressure value. The inlet pressure value and the outlet pressure value are continuously collected within the preset isolation time. The absolute value of the difference between the outlet pressure value at the start time and the outlet pressure value at the end time of the preset isolation duration is taken as the negative pressure attenuation amount. The negative pressure attenuation amount and the change in the inlet pressure value within the preset isolation time are combined to form the negative pressure attenuation response.

4. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 3, characterized in that, The acquisition of the aspiration flow response includes: connecting the metering aspiration branch to the postoperative drainage tube with the flushing valve closed, the proximal isolation valve closed, and the distal isolation valve open; controlling the metering aspiration branch to perform aspiration according to the preset aspiration volume; acquiring the actual aspiration flow and pressure value of the metering aspiration branch; and combining the actual aspiration flow and pressure value of the aspiration branch to form the aspiration flow response.

5. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 4, characterized in that, The generation of the verification classification result includes: when the negative pressure attenuation is less than a first attenuation threshold, the actual backflow rate is less than a first backflow rate threshold, and the backflow branch pressure value is greater than a first backflow pressure threshold, the verification classification result is determined to be the blockage type result; when the negative pressure attenuation is greater than a second attenuation threshold, and the negative pressure control pump drive quantity is greater than a preset leakage drive quantity threshold, the verification classification result is determined to be the leakage type result; when the negative pressure value of the liquid collection container is greater than a preset over-negative pressure threshold, and the actual backflow rate is less than a second backflow rate threshold, the verification classification result is determined to be the over-negative pressure type result.

6. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 1, characterized in that, When the verification classification result is the obstructive type result, the execution of the negative pressure slow-release control includes: Adjust the negative pressure output value of the negative pressure control pump from the current negative pressure output value to the first slow-release negative pressure value; close the drainage valve; After the negative pressure value of the collection container enters the preset slow-release negative pressure range, the proximal isolation valve is closed; after the proximal isolation valve is closed, the flushing valve pulse control is activated.

7. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 1, characterized in that, The flushing valve pulse control includes: The flushing valve is opened and closed according to the first pulse cycle, so that the flushing branch outputs a pulsed flushing fluid flow to the postoperative drainage tube. The outlet pressure value is acquired during each of the first pulse cycles; When the outlet pressure value is greater than the first pressure threshold, the flushing valve is closed and the flushing valve pulse control is stopped; When the preset number of pulses is completed and the pressure value at the outlet is less than the second pressure threshold, the intermittent drive control of the unblocking actuator is activated.

8. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 4, characterized in that, The intermittent drive control of the unblocking actuator includes: The flushing valve is controlled to be in the closed state, and the unblocking actuator is driven while the flushing valve is in the closed state; The driving duration of the unblocking actuator is determined based on the pressure value of the backflow branch. The driving interval of the unblocking actuator is determined based on the actual backflow rate. After completing the preset number of drive cycles, the remote isolation valve is opened, and the inlet pressure value, the outlet pressure value, and the drainage fluid flow rate are collected again.

9. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 1, characterized in that, When the verification classification result is the leakage type result, the negative pressure correction control includes: Keep the flushing valve closed; Adjust the drainage valve to the first detection opening degree; The negative pressure control pump is controlled to operate according to the first detected drive quantity; The negative pressure value of the liquid collection container is collected during a preset detection period; When the negative pressure value of the liquid collection container is still less than the preset leakage detection negative pressure threshold, the drainage valve is closed and the negative pressure control pump is stopped.

10. The method for intelligent monitoring and complication early warning of postoperative drainage tubes in urology according to claim 1 or 9, characterized in that, The equipment interlocking control includes: Close the proximal isolation valve, the distal isolation valve, the drainage valve, and the flushing valve; Stop the negative pressure control pump and the unblocking actuator; Keep the metering backflow branch in the disconnected state; Set the abnormal pipeline parameter early warning signal as a lockout signal; Before receiving the unlocking command, the controller is prohibited from starting the negative pressure control pump, opening the flushing valve, and driving the unblocking actuator.

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