CN111001051A - Monitoring alarm system for pipeline blockage of negative pressure closed drainage system - Google Patents
Monitoring alarm system for pipeline blockage of negative pressure closed drainage system Download PDFInfo
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- CN111001051A CN111001051A CN201911357832.8A CN201911357832A CN111001051A CN 111001051 A CN111001051 A CN 111001051A CN 201911357832 A CN201911357832 A CN 201911357832A CN 111001051 A CN111001051 A CN 111001051A
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- A—HUMAN NECESSITIES
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- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
Abstract
The invention discloses a monitoring alarm system for pipeline blockage of a negative pressure closed drainage system, which comprises a main control unit, a first sensor, an alarm, a second sensor and a fluid monitoring pipe, wherein the main control unit is connected with the alarm; the main control unit is used for comprehensively judging whether a drainage pipeline of the negative pressure closed drainage system is blocked or not according to the comparison between the negative pressure value of the first gas buffer chamber and the pressure value of the second gas buffer chamber and the maximum set value of the negative pressure source and the set value of a user, controlling and adjusting the negative pressure value of the first gas buffer chamber to judge a blocking point when the drainage pipeline is blocked, and sending a blocking point alarm signal to the alarm; and the alarm sends out an alarm signal when receiving the alarm signal of the main control unit. The drainage device can safely and effectively drain, is beneficial to automatically relieving blockage, and reduces unnecessary workload of medical staff and unnecessary stress of patients.
Description
Technical Field
The invention relates to tissue treatment equipment, in particular to a monitoring and alarming system for pipeline blockage of a negative pressure closed drainage system.
Background
Clinical research and practice show that the negative pressure closed drainage technology can be used for timely removing exudate from a tissue part and infectious tissues in the tissue part to keep the tissue part in a clean and dry environment, promote wound edge healing, relieve edema, promote granulation tissue growth and shorten treatment time. However, in the negative pressure closed drainage process, the pipeline is blocked occasionally, the purpose of effective drainage cannot be achieved due to the pipeline blockage, and the tissue exudate can be accumulated at the tissue part. Because the monitoring pipeline is not directly connected with the negative pressure source, the negative pressure in the pipeline is equal everywhere, and therefore drainage liquid can not enter the monitoring pipeline to cause the risk of pipeline blockage. Pipeline blocks up mainly can be divided into drainage pipeline and blocks up and the full jam of liquid collection bottle, and pipeline blocks up and can lead to increasing medical personnel work load and reduce the product usability if unable self-resuming with correct discernment, judges simultaneously that pipeline blocks up the in-process and probably causes the risk that the negative pressure is too high and drainage liquid flows back to the surface of a wound to the patient.
Therefore, the pipeline blockage of the negative pressure closed drainage system needs to be monitored and alarmed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a monitoring alarm system for pipeline blockage of a negative pressure closed drainage system, which solves the problems existing in the pipeline blockage process of the negative pressure closed drainage technology.
In order to achieve the aim, the invention designs a monitoring alarm system for pipeline blockage of a negative pressure closed drainage system, which comprises a main control unit, a first sensor, an alarm, a second sensor and a fluid monitoring pipe, wherein the main control unit is connected with the first sensor; one end of the fluid monitoring pipe is connected with the porous dressing, the other end of the fluid monitoring pipe is connected with the second gas buffer chamber,
the first sensor is arranged on the first gas buffer chamber and used for monitoring the negative pressure value P of the first gas buffer chamber1(the pressure value of the first gas buffer chamber is the same as the negative pressure value of the negative pressure source 10), and sending the pressure value to the main control unit;
the second sensor is arranged on the second gas buffer chamber and used for monitoring the pressure value P of the second gas buffer chamber2(pressure value P of second gas buffer chamber2Group with skinThe woven pressure values are the same), and the pressure values are sent to a main control unit;
the main control unit is used for controlling the air compressor according to the negative pressure value P of the first air buffer chamber1And pressure value P of the second gas buffer chamber2Respectively comparing with the maximum set value and the user set value of the negative pressure source, comprehensively judging whether the drainage pipeline of the negative pressure closed drainage system is blocked, and controlling and adjusting the negative pressure value P of the first gas buffer chamber when the drainage pipeline is blocked1Judging the blocking point according to the size of the blocking point, and sending a blocking point alarm signal to an alarm;
and the alarm sends out an alarm signal when receiving the alarm signal of the main control unit.
Still further, the first sensor and the second sensor monitor the negative pressure value P of the first gas buffer chamber in real time1And pressure value P of the second gas buffer chamber2The first sensor and the second sensor respectively detect the negative pressure value P1And a pressure value P2Inputting the pressure value P to a main control unit2Compared with the set value of the user,
when monitoring the pressure value P2When the power is less than the set value of the user, the main control unit controls the power of the negative pressure source to increase; negative pressure value P monitored by the first sensor1Gradually increases until the negative pressure value P1When the maximum set value of the negative pressure source is equal to the maximum set value of the negative pressure source; the first sensor and the second sensor respectively detect the negative pressure value P1And a pressure value P2Inputting the pressure value P to a main control unit2Compared with the set value of the user,
when the pressure value P is monitored2Less than the user set value and the negative pressure value P1When the pressure value is equal to the maximum set value of the negative pressure source, the main control unit controls the second electromagnetic valve to open, releases the pressure of the tissue part, further increases the pressure difference on two sides of the blocking point until the pressure value P is reached2When the pressure value is 0, the main control unit controls the second electromagnetic valve to be closed, and the pressure is continuously reduced until the monitored pressure value P2Equal to 0 and pressure value P2Less than the user set value and the negative pressure value P1And when the maximum set value of the negative pressure source is equal, determining that the drainage pipeline is blocked.
Still further, the drainage lineWhen the blockage occurs, the main control unit controls the first electromagnetic valve to be opened, and when the first sensor monitors the negative pressure value P in real time1When the negative pressure value is reduced to the target value, the main control unit instantly controls the first electromagnetic valve to be closed and monitors the negative pressure value P in real time1
(ii) a At the same time, the first sensor and the second sensor will detect the negative pressure value P1Inputting the negative pressure value P to a main control unit1And comparing the target value with the target value, and judging the blockage point of the drainage pipeline.
Still further, the negative pressure value P1And when the value is less than or equal to the target value, the main control unit judges the blocking point as a filter, and simultaneously sends a blocking alarm signal of the filter to the alarm.
Still further, the negative pressure value P1And if the value is larger than the target value, the main control unit judges that the blockage point is on the pipeline of the drainage tube, and simultaneously, the main control unit sends a blockage alarm signal of the drainage tube to the alarm.
Still further, the target value set in the main control unit is 50mmHg to 100mmHg, and the target value is preferably 76 mmHg.
The principle of the invention is as follows:
1) under the effect of the negative pressure source, the negative pressure is conducted to the tissue part, the biological semipermeable membrane shrinks due to lower air leakage rate, the exudate at the tissue part submerges the port of the drainage tube under the shrinking and squeezing of the porous dressing and the biological semipermeable membrane, meanwhile, the pressure reduction is monitored by the second sensor due to the lower air leakage rate of the biological semipermeable membrane, the negative pressure source compensates the reduced pressure at the tissue part through pressurization, and the exudate at the tissue part is repeatedly drained into the liquid collecting bottle, which is similar to the principle of sucking cola through the beverage tube.
2) The drainage pipeline monitored by the monitoring alarm system comprises a drainage tube and a filter;
a. if the blockage occurs in the drainage tube, the gas amount contained from the blockage point to the negative pressure source is about the gas amount in the liquid collecting bottle plus the gas amount in the first gas buffer chamber, and the gas amount contained in a section of the drainage tube from the blockage point to the liquid collecting bottle is negligible considering that the inner diameter of the drainage tube is smaller.
b. If the blockage occurs in the filter, the gas amount contained from the blockage point to the negative pressure source is about the gas amount in the first gas buffer chamber; when the filter is submerged by the percolate in the liquid collecting bottle, the residual gas amount is far larger than that of the first gas buffer chamber, wherein the gas amount is the product of the volume occupied by the ideal gas in an equilibrium state and the pressure of the ideal gas, and under the same pressure, the larger the volume is, the larger the gas amount is.
3) After the blockage occurs, the second sensor senses the blockage of the negative pressure closed drainage system through pressure change, the negative pressure source is controlled by the main control unit to reach certain negative pressure and continue for a certain time, the certain negative pressure can be sensed by the first sensor, the timer of the main control unit can be used for timing for a certain time, and the main control unit can be one or more processors which are the same or different. If the second sensor senses that the negative pressure at the tissue site does not reach the user set value, the occlusion is not considered to be released, and the second solenoid valve is opened to reduce the negative pressure at the tissue site to 0mmHg (millimeters of mercury). If the pressure difference between the two ends of the blocking point reaches the maximum value, and the force-bearing direction of the blocking point is pointed to the negative pressure source, the liquid remained in the fluid pipeline is effectively prevented from flowing back to the tissue part, and the automatic blockage relieving is promoted as far as possible.
4) Principle of judging clogging point
The position of the blockage is judged to be stable and reliable according to the negative pressure after air bleeding. According to the bernoulli equation of fluid mechanics, the pressure at the position with large flow velocity is small and the pressure at the position with small flow velocity is strong neglecting the influence of height difference in the fluid pipeline, so that the conclusion can be obtained: the flow velocity is large and the pressure is small at the position where the sectional area of the fluid pipeline is small; the flow velocity is small at the position with large sectional area and the pressure is strong. Therefore, the sectional area of the gas buffer chamber and the fluid pipeline is required to be controlled to be far smaller than the internal sectional area of the liquid collecting bottle, meanwhile, the first sensor is connected in the fluid pipeline with small sectional area, after the first electromagnetic valve is opened, because the sectional area is small, the gas flow velocity in the pipeline is very fast, the negative pressure sensed by the first sensor is reduced rapidly, meanwhile, if the filter in the liquid collecting bottle is not blocked, the negative pressure is reduced slowly because the gas flow velocity in the bottle with larger sectional area is slower and the pressure is higher, when the negative pressure sensed by the first sensor is reduced to a target value (such as 76 mmHg), the first electromagnetic valve is immediately closed, so that the flow speed in the fluid pipeline with the small cross section area is rapidly reduced to 0, at the moment, the negative pressure sensed by the first sensor is mixed with the negative pressure in the liquid collecting bottle and then is approximately equal to the negative pressure in the liquid collecting bottle, and the expression form is that the negative pressure sensed by the first sensor is rapidly increased after the first electromagnetic valve is closed.
If the filter in the liquid collecting bottle is blocked, the first electromagnetic valve is closed immediately after the negative pressure sensed by the first gas buffer chamber is reduced to a target value (such as 76 mmHg), so that the flow speed in the fluid pipeline with the small cross section is rapidly reduced to 0, and the negative pressure sensed by the first sensor is approximately equal to the negative pressure sensed when the first electromagnetic valve is closed, and the expression is that the negative pressure sensed by the first sensor is slightly lower than the target value (such as 76 mmHg) after the first electromagnetic valve is closed.
The invention has the beneficial effects that:
the monitoring alarm system of the invention relieves the blockage of the drainage pipeline in the drainage process by monitoring; because the pressure difference always keeps positive, namely the negative pressure from the blocking point to the negative pressure source is always kept to be larger than the negative pressure from the blocking point to the tissue part, the residual liquid in the drainage tube can overcome the gravity and the resistance of the tissue exudate to flow into the liquid collecting bottle and can not flow back to the tissue part to cause secondary infection, and once the main control unit monitors that the negative pressure of the tissue part is higher than a certain negative pressure value of the negative pressure set by a user through the second sensor, the second electromagnetic valve can be further opened to reduce the negative pressure of the tissue part to the negative pressure set by the user. Therefore, safe and effective drainage is achieved, automatic blockage relieving is facilitated, and unnecessary workload of medical staff and unnecessary tension of patients are reduced.
Drawings
FIG. 1 is a monitoring alarm system for negative pressure closed drainage system pipeline blockage according to the invention;
FIG. 2 is a connection block diagram of a main control unit of the monitoring alarm system;
in the figure, a tissue site 1, a porous dressing 2, a biological semipermeable membrane 3, a drainage tube 4, a fluid monitoring tube 5, a liquid collecting bottle 6, a filter 7, a gas guide tube 8, a first gas buffer chamber 9, a first exhaust tube 9.1, a negative pressure source 10, a first electromagnetic valve 11, a first sensor 12, a second gas buffer chamber 13, a second exhaust tube 13.1, a second sensor 14, a second electromagnetic valve 15, a main control unit 16, an alarm 17 and a percolate 18;
FIG. 3 is a graph showing the variation of the negative pressure value of the first sensor in each state of the 300mL liquid trap.
Detailed Description
The present invention is described in further detail below with reference to specific examples so as to be understood by those skilled in the art.
As shown in fig. 1-2, the monitoring alarm system for pipeline blockage of the negative pressure closed drainage system is installed on the negative pressure closed drainage system, the negative pressure closed drainage system comprises a porous dressing 2 contacting with a tissue part 1 of a patient, the back of the porous dressing 2 is connected with a drainage tube 4, and the porous dressing 2 is wrapped with a biological semipermeable membrane 3 for sealing; the other end of the drainage tube 4 is connected with a liquid collecting bottle 6,
a filter 7 is arranged on the upper part of the inner wall of the liquid collecting bottle 6, and the filter 7 is communicated with a first gas buffer chamber 9 through a gas guide pipe 8; the first gas buffer chamber 9 is connected with a negative pressure source 10 through a pipeline, the first gas buffer chamber 9 is connected with a first exhaust pipe 9.1, and a first electromagnetic valve 11 is arranged on the first exhaust pipe 9.1;
the monitoring alarm system comprises a fluid monitoring pipe 5 and a first sensor 12 arranged on a first gas buffer chamber 9, one end of the fluid monitoring pipe 5 is connected to the back of the porous dressing 2, and the other end of the fluid monitoring pipe 5 is connected with a second gas buffer chamber 13; a second sensor 14 and a second exhaust pipe 13.1 are arranged on the second gas buffer chamber 13, and a second electromagnetic valve 15 is arranged on the second exhaust pipe 13.1;
the output ends of the first sensor 12 and the second sensor 14 are respectively connected with the input end of the main control unit 16; the output end of the main control unit 16 is respectively connected with the input ends of the negative pressure source 10, the first electromagnetic valve 11, the second electromagnetic valve 15 and the alarm 17.
The monitoring method of the monitoring alarm system for the blockage of the negative pressure closed drainage system pipeline comprises the following steps:
1) under the action of the negative pressure source 10, the negative pressure is conducted to the tissue part 1, the biological semipermeable membrane 3 shrinks due to the lower air leakage rate, and the exudate 18 at the tissue part 1 submerges the port of the drainage tube 4 into the liquid collecting bottle 6 under the shrinking and squeezing of the porous dressing 2 and the biological semipermeable membrane 3;
2) the first sensor 12 and the second sensor 14 monitor the negative pressure value P of the first gas buffer chamber 9 in real time during the process of draining the exudate 18 to the liquid collecting bottle 61And the pressure value P of the second gas buffer chamber 132The first sensor 12 and the second sensor 14 respectively measure the negative pressure value P1And a pressure value P2Inputting the pressure value into the main control unit 16, and the main control unit 16 monitoring the pressure value P2Compared with the set value of the user,
when monitoring the pressure value P2When the power is smaller than the set value of the user, the main control unit 16 controls the power of the negative pressure source to increase; negative pressure value P monitored by first sensor 121Gradually increases until the negative pressure value P1Equal to the maximum set value of the negative pressure source 10; the first sensor 12 and the second sensor 14 respectively measure the negative pressure value P1And a pressure value P2Inputting the pressure value into the main control unit 16, and the main control unit 16 monitoring the pressure value P2Compared with the set value of the user,
when the pressure value P is monitored2Less than the user set value and the negative pressure value P1When the pressure value is equal to the maximum set value of the negative pressure source 10, the main control unit 16 controls the second electromagnetic valve 15 to open, releases the pressure of the tissue part 1, further increases the pressure difference between two sides of the blocking point until the pressure value P is reached2When the pressure value is 0, the main control unit 16 controls the second electromagnetic valve 15 to close, and continuously reduces the pressure until the monitored pressure value P2Equal to 0 and pressure value P2Less than the user set value and the negative pressure value P1When the maximum set value of the negative pressure source 10 is equal, the blockage of the drainage pipeline is determined;
3) when the drainage pipeline is blocked, the main control unit 16 controls the first electromagnetic valve 11 to be opened, and when the negative pressure value P monitored by the first sensor 12 in real time1When the negative pressure value is reduced to the target value, the main control unit instantly controls the first electromagnetic valve to be closed and monitors the negative pressure value P in real time1(ii) a At the same time, the first sensor 12 will measure the negative pressure value P1Inputting the negative pressure value P into the main control unit 16, and monitoring the negative pressure value P by the main control unit 161Comparing the target value with the target value, and judging the blockage point of the drainage pipeline;
4) when the negative pressure value P1When the value is less than or equal to the target value, the main control unit 16 judges that the blockage point is the filter 7, and simultaneously the main control unit 16 sends a blockage alarm signal of the filter 7 to the alarm 17;
5) when the negative pressure value P is1If the value is larger than the target value, the main control unit 16 judges that the blockage point is on the pipeline of the drainage tube 4, and simultaneously the main control unit 16 sends a blockage alarm signal of the drainage tube 4 to the alarm 17.
Based on the system and the monitoring method, a 300ml liquid collecting bottle is selected to be tested in the states of empty bottle, full bottle and close bottle full:
when the drainage pipeline is blocked, the negative pressure value P1The process of opening the first solenoid valve 11 at the maximum set value of the negative pressure source 10 (350 mmHg in the specific embodiment), closing the first solenoid valve 11 immediately after the negative pressure sensed by the first sensor 12 decreases to 76mmHg, the negative pressure curve sensed by the first sensor 12,
in addition, test data for blocking the drainage tube 4 and the fluid monitoring tube 5 in a state close to the full bottle is added to obtain data shown with reference to fig. 3, in which the horizontal axis of time is in seconds(s) and the vertical axis of negative pressure is in mmHg (mmHg). And the data can be stably, reliably and repeatedly tested for a plurality of curves, so that the stability of the judgment result is ensured.
Analysis of test data:
as shown in fig. 3: the test is carried out by using a 300mL bottle full liquid collecting bottle, and the negative pressure sensed by the first sensor 12 is about 50mmHg (millimeter mercury) and lower than 76mmHg (millimeter mercury) after the negative pressure is stabilized;
the test was performed using a 300mL near bottle full liquid trap, and when the drainage tube 4 or the fluid monitoring tube 5 was blocked, respectively, the negative pressure curves sensed by the first sensor 12 were all much higher than 76mmHg (millimeters of mercury) after stabilization, wherein the curve difference is such that the amount of gas after the blockage contained the amount of gas contained in the porous dressing 2, and wherein the total amount of gas released after the blockage of the fluid monitoring tube 5 was larger than that of the drainage tube 4.
When the test is performed by using a 300mL empty collection bottle, the negative pressure curve sensed by the first sensor 12 is much higher than 76mmHg (millimeter Hg) after the negative pressure curve is stabilized after the drainage tube 4 is blocked.
And (4) test conclusion:
it can be seen from the data that, after the negative pressure source 10 is raised to 350mmHg (mmHg) and stabilized, the first sensor 12 measures the same descending curve after the first electromagnetic valve 11 is opened, so there is no distinction in the blockage status of the negative pressure closed drainage system, when the first sensor 12 descends to a certain negative pressure (e.g. 76 mmHg), the first electromagnetic valve 11 is closed, the liquid collecting bottle 6 is in the full-bottle and non-full-bottle status, the negative pressure curve measured by the first sensor 12 is clearly distinguished, the L-shaped negative pressure curve in the full-bottle status will not bounce, while the V-shaped negative pressure curve in the non-full-bottle status will not bounce, even if the V-shaped negative pressure curve in the nearly full-bottle status will bounce, the more the gas contained in the gas discharge, the higher the bounce curve, meanwhile, the whole negative pressure curve keeps a stable state within 0.2s, and the judgment process is very fast in time.
The invention effectively and safely judges the pipeline blockage situation of the negative pressure closed drainage system in the realization principle, and has certain pipeline blockage self-recovery function and pipeline liquid backflow prevention characteristic.
Other parts not described in detail are prior art. Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (7)
1. The utility model provides a monitoring alarm system that is used for drainage system pipeline to block up is sealed to negative pressure which characterized in that: the monitoring alarm system comprises a main control unit, a first sensor, an alarm, a second sensor and a fluid monitoring pipe; one end of the fluid monitoring pipe is connected with the porous dressing, the other end of the fluid monitoring pipe is connected with the second gas buffer chamber,
the first sensor is arranged on the first gas buffer chamber, is used for monitoring the negative pressure value of the first gas buffer chamber and sending the negative pressure value to the main control unit;
the second sensor is arranged on the second gas buffer chamber, is used for monitoring the pressure value of the second gas buffer chamber and sending the pressure value to the main control unit;
the main control unit is used for comprehensively judging whether a drainage pipeline of the negative pressure closed drainage system is blocked or not according to the comparison between the negative pressure value of the first gas buffer chamber and the pressure value of the second gas buffer chamber and the maximum set value of the negative pressure source and the set value of a user, controlling and adjusting the negative pressure value of the first gas buffer chamber to judge a blocking point when the drainage pipeline is blocked, and sending a blocking point alarm signal to the alarm;
and the alarm sends out an alarm signal when receiving the alarm signal of the main control unit.
2. The system for monitoring and alarming blockage of the pipeline of the negative pressure closed drainage system according to claim 1, which is characterized in that: the first sensor and the second sensor monitor the negative pressure value of the first gas buffer chamber and the pressure value of the second gas buffer chamber in real time, the first sensor and the second sensor respectively input the negative pressure value and the pressure value into the main control unit, the main control unit compares the monitored pressure value with a user set value,
when the monitoring pressure value is smaller than the set value of the user, the main control unit controls the power of the negative pressure source to increase; the negative pressure value monitored by the first sensor gradually rises until the negative pressure value is equal to the maximum set value of the negative pressure source; the first sensor and the second sensor respectively input the negative pressure value and the pressure value into the main control unit, the main control unit compares the monitored pressure value with a user set value,
when the monitored pressure value is smaller than the user set value and the negative pressure value is equal to the maximum set value of the negative pressure source, the main control unit controls the second electromagnetic valve to open, releases the pressure of the tissue part, further increases the pressure difference on two sides of the blocking point until the pressure value is 0, controls the second electromagnetic valve to close, continuously reduces the pressure until the monitored pressure value is equal to 0, the pressure value is smaller than the user set value and the negative pressure value is equal to the maximum set value of the negative pressure source, and determines that the drainage pipeline is blocked.
3. The system for monitoring and alarming blockage of the negative pressure closed drainage system pipeline according to claim 2, characterized in that: when the drainage pipeline is blocked, the main control unit controls the first electromagnetic valve to be opened, and when the negative pressure value monitored by the first sensor in real time is reduced to a target value, the main control unit instantly controls the first electromagnetic valve to be closed and the negative pressure value monitored in real time; meanwhile, the first sensor inputs the negative pressure value into the main control unit, and the main control unit compares the monitored negative pressure value with a target value and judges the blockage point of the drainage pipeline.
4. The system for monitoring and alarming blockage of the pipeline of the negative pressure closed drainage system according to claim 3, wherein: and when the negative pressure value is less than or equal to the target value, the main control unit judges that the blocking point is a filter, and simultaneously, the main control unit sends a blocking alarm signal of the filter to the alarm.
5. The system for monitoring and alarming blockage of the pipeline of the negative pressure closed drainage system according to claim 3, wherein: the negative pressure value is larger than the target value, the main control unit judges that a blockage point is on a pipeline of the drainage tube, and meanwhile the main control unit sends a blockage alarm signal of the drainage tube to the alarm.
6. A monitoring and alarm system for negative pressure closed drainage system pipeline blockage according to claim 3, 4 or 5, characterized in that: the target value set in the main control unit is 50 mmHg-100 mmHg.
7. The system for monitoring and alarming blockage of the pipeline of the negative pressure closed drainage system according to claim 6, wherein: the target value set in the main control unit is 76 mmHg.
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| CN111714712A (en) * | 2020-06-30 | 2020-09-29 | 青岛市中心医院 | Gastrointestinal decompression storage device |
| CN113181453A (en) * | 2021-04-19 | 2021-07-30 | 宁波新跃医疗科技股份有限公司 | Negative pressure suction device |
| CN115155828A (en) * | 2022-06-29 | 2022-10-11 | 深圳赛桥生物创新技术有限公司 | Pipeline negative pressure threshold determination and abnormity warning method, controller, system and medium |
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| CN115155828B (en) * | 2022-06-29 | 2023-08-04 | 深圳赛桥生物创新技术有限公司 | Pipeline negative pressure threshold value determination and abnormality warning method, controller, system and medium |
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