Smart device for gastrointestinal fluid decompression

Abstract

The present invention relates to the field of medical equipment, and specifically to an intelligent device for decompressing gastrointestinal fluid, wherein the first air duct in the device is respectively connected to a liquid extraction tube and a U-shaped tube at the liquid extraction end, and the second air duct is respectively connected to an exhaust pipe and a U-shaped tube at the exhaust end; an electronic air pump is installed on the exhaust pipe, and the electronic air pump is started once at regular intervals, and the speed of the electronic air pump during subsequent starts and the time of stopping the start are determined according to the changing law of the gastrointestinal pressure relief characteristics during the start-up time period and the changing law of the gastrointestinal pressure increase characteristics during the stop-start time period. The present invention controls the decompression intensity or decompression time during the gastric fluid decompression process by controlling the speed of the electronic air pump and the time of stopping the start, avoiding the situation of relying too much on manual decompression control by medical staff, and can adapt to the specific physiological conditions of the patient's gastrointestinal tract.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to an intelligent device for decompressing gastrointestinal fluid. Background Art

[0002] The purpose of gastrointestinal fluid decompression is to relieve the patient's symptoms, improve comfort, and prevent complications by discharging liquid or gas in the stomach or intestines. For example, CN114404687A discloses a gastrointestinal fluid decompression device for gastrointestinal surgery, and CN111760082B discloses a gastrointestinal fluid decompression device for clinical use in gastrointestinal surgery, both of which can achieve gastrointestinal decompression.

[0003] However, existing gastrointestinal fluid decompression equipment cannot control the decompression intensity or decompression time during the gastric fluid decompression process, or relies too much on medical staff to perform manual decompression control, and cannot automatically regulate the decompression process according to the specific physiological conditions of the patient's stomach and intestines. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an intelligent device for decompressing gastrointestinal fluid.

[0005] An intelligent device for decompressing gastrointestinal fluid provided by an embodiment of the present invention comprises: a liquid extraction tube and an exhaust tube, wherein one end of a first air guide tube in the device is connected to the liquid extraction tube, and the other end is connected to a U-shaped tube at the liquid extraction end; one end of a second air guide tube is connected to the exhaust tube, and the other end is connected to the U-shaped tube at the exhaust end; an electronic air pump is connected to the exhaust tube, and a camera collects images of the U-shaped tube at the liquid extraction end and the U-shaped tube at the exhaust end; a processor reads the images and controls the electronic air pump;

[0006] The working principle of the device is as follows: the electronic air pump is started, and the electronic air pump stops after a preset time period T1, and within the time period T1, the computer program in the processor obtains the gastrointestinal pressure relief characteristics according to the height of the liquid level in the U-shaped tube at the liquid extraction end and the U-shaped tube at the exhaust end in the image; the electronic air pump is started again after a preset time period T2, and within the time period T2, the computer program in the processor obtains the gastrointestinal pressure increase characteristics according to the height of the liquid level in the U-shaped tube at the liquid extraction end and the U-shaped tube at the exhaust end in the image;

[0007] The computer program in the processor obtains the rotation speed of the electronic air pump in a preset time period T3 after time period T2 according to the changing law of the gastrointestinal pressure relief characteristic and the changing law of the gastrointestinal pressure increase characteristic, and starts the electronic air pump again based on the rotation speed in time period T3. In time period T3, the gastrointestinal pressure relief characteristic F is obtained according to the height of the liquid level in the U-tube at the suction end and the U-tube at the exhaust end in the image; and the stop and start time of the electronic air pump each time it stops and starts after time period T3 according to the changing law of the gastrointestinal pressure increase characteristic and the changing law of the gastrointestinal pressure relief characteristic F.

[0008] Preferably, an observation window is provided on one side of the U-shaped tube at the liquid extraction end and the U-shaped tube at the exhaust end.

[0009] Preferably, pistons are placed on the liquid surfaces in the U-shaped tube at the liquid extraction end and the U-shaped tube at the exhaust end, respectively, metal blocks are placed on the pistons, and annular protrusions are provided inside the tube openings of the U-shaped tube at the liquid extraction end and the U-shaped tube at the exhaust end.

[0010] Preferably, the first air duct, the second air duct, the U-shaped tube at the liquid extraction end, the U-shaped tube at the exhaust end, the camera, and the processor are all installed in a replaceable top cover.

[0011] Preferably, the specific steps for obtaining the gastrointestinal decompression feature, the gastrointestinal pressure-increasing feature and the gastrointestinal decompression feature F are as follows:

[0012] For any moment in time periods T1, T2, and T3, images of the U-shaped tube at the liquid extraction end and the U-shaped tube at the exhaust end captured by the camera at the moment are obtained, and the liquid level A of the U-shaped tube at the liquid extraction end and the liquid level B of the U-shaped tube at the exhaust end are obtained according to the images, and [A, B, AB] is used as the gastrointestinal pressure feature at each moment;

[0013] The gastrointestinal pressure characteristics at each moment in time period T1 are recorded as gastrointestinal pressure relief characteristics, the gastrointestinal pressure characteristics at each moment in time period T2 are recorded as gastrointestinal pressure increase characteristics, and the gastrointestinal pressure characteristics at each moment in time period T3 are recorded as gastrointestinal pressure relief characteristics F.

[0014] Preferably, the specific steps for obtaining the changing rule of the gastrointestinal pressure relief feature, the changing rule of the gastrointestinal pressure increase feature, and the changing rule of the gastrointestinal pressure relief feature F are as follows:

[0015] For any one of the time periods T1, T2, and T3, the gastrointestinal pressure characteristics at all times within the time period are reduced to one dimension, the one-dimensional dimension reduction result is recorded as the pressure index, and the time series sequence composed of all the pressure indexes is used as the pressure change law;

[0016] The pressure change law corresponding to time period T1 is recorded as the change law of gastrointestinal pressure relief characteristics, the pressure change law corresponding to time period T2 is recorded as the change law of gastrointestinal pressure increase characteristics, and the pressure change law corresponding to time period T3 is recorded as the change law of gastrointestinal pressure relief characteristics F.

[0017] Preferably, the method of obtaining the rotation speed of the electronic air pump in a preset time period T3 after the time period T2 according to the changing law of the gastrointestinal pressure relief characteristics and the changing law of the gastrointestinal pressure increase characteristics includes the following specific steps:

[0018] The changing rules of gastrointestinal pressure relief characteristics are divided into several subsequences, recorded as subsequences L1, and the first pressure index and the last pressure index in each subsequence L1 constitute the index interval K1 of each subsequence L1;

[0019] For the pressure index in the variation law of the gastrointestinal pressure increase feature, the pressure index in the index interval K1 is also taken as a subsequence, and the variation law of the gastrointestinal pressure increase feature is also divided into several subsequences, which are recorded as subsequences L2;

[0020] Each subsequence L2 in the variation law of the gastrointestinal pressure-increasing feature corresponds to a subsequence L1 in the variation law of the gastrointestinal pressure-relieving feature;

[0021] According to the correlation between subsequence L2 and the corresponding subsequence L1 and the difference in time length between subsequence L2 and the corresponding subsequence L1, the rotation speed at each moment in subsequence L2 is obtained, and the rotation speed at all moments in all subsequences L2 in the changing law of gastrointestinal pressure boost characteristics is used as the rotation speed of the electronic air pump in time period T3.

[0022] Preferably, the method of obtaining the stop-start time of the electronic air pump each time it stops and starts after the time period T3 according to the change law of the gastrointestinal pressure increase characteristic and the change law of the gastrointestinal pressure relief characteristic F comprises the following specific steps:

[0023] The Pearson correlation coefficient k1 of the change law of the gastrointestinal pressure increase characteristic and the change law of the gastrointestinal pressure relief characteristic F is obtained, and w1=(1-k1) / 2; the length of the time period T2 is recorded as the reference time length Q1; the stop-start time of the electronic air pump each time it stops and starts after the time period T3 is recorded as Q2, and the method for obtaining Q2 is:

[0024] When w1 is greater than the first preset correlation coefficient, Q2 is equal to the reference time length Q1;

[0025] When k1 is less than or equal to the first preset correlation coefficient, if the time length of time period T3 is greater than the reference time length Q1, Q1 is increased by a preset percentage and used as Q2; if the time length of time period T3 is less than or equal to the reference time length Q1, Q1 is decreased by a preset percentage and used as Q2.

[0026] Preferably, the step of obtaining the rotation speed at each moment in the subsequence L2 according to the correlation between the subsequence L2 and the corresponding subsequence L1 and the difference in time length between the subsequence L2 and the corresponding subsequence L1 comprises the following specific steps:

[0027] Obtain the Pearson correlation coefficient k between the subsequence L2 and the corresponding subsequence L1, and use w=(1-k) / 2 as the correlation between the subsequence L2 and the corresponding subsequence L1;

[0028] Obtain the difference between the time length of the corresponding subsequence L1 and the time length of the subsequence L2, and the ratio of the difference to the time length of the subsequence L1 is recorded as s; the speed of the electronic air pump in the time period T1 is recorded as V0; the speed at each moment in the subsequence L2 is recorded as V2;

[0029] When w is less than or equal to the second preset correlation coefficient TH2: ;

[0030] When w is greater than the second preset correlation coefficient TH2: .

[0031] Preferably, the step of dividing the changing rules of the gastrointestinal pressure relief characteristics into several subsequences includes the following specific steps:

[0032] The changing pattern of gastrointestinal pressure relief characteristics is subjected to first-order difference to obtain a difference sequence, the difference values ​​in the difference sequence are linearly normalized, and the difference values ​​after linear normalization that are greater than the preset difference values ​​are recorded as abnormal difference values; the pressure indicators corresponding to the abnormal difference values ​​are used as segmentation points, and all segmentation points divide the changing pattern of gastrointestinal pressure relief characteristics into several subsequences.

[0033] The beneficial effects of the technical solution of the present invention are:

[0034] The first air guide tube in the decompression device of the present invention is connected to the liquid extraction tube and the U-shaped tube at the liquid extraction end, and the second air guide tube is connected to the exhaust tube and the U-shaped tube at the exhaust end; ensuring that the pressure of the gas or liquid discharged from the stomach and intestine during the decompression process can be conveniently and accurately obtained.

[0035] The electronic air pump is installed on the exhaust pipe, and is started at regular intervals. The speed of the electronic air pump and the time of stopping the start are determined according to the changing law of the gastrointestinal pressure relief characteristics in the start-up period and the changing law of the gastrointestinal pressure increase characteristics in the stop-start period. The present invention controls the decompression intensity or decompression time during the gastric fluid decompression process by controlling the speed of the electronic air pump and the stop-start time, avoiding reliance on manual decompression control by medical staff, and can adapt to the specific physiological conditions of the patient's gastrointestinal tract. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1A schematic diagram of the overall structure of an intelligent device for decompressing gastrointestinal fluid provided by an embodiment of the present invention;

[0038] Figure 2 A cross-sectional view of a U-shaped tube at a liquid extraction end and a U-shaped tube at a gas exhaust end of an intelligent device for decompressing gastrointestinal fluid provided by one embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the internal structure of a top cover of an intelligent device for decompressing gastrointestinal fluid provided by one embodiment of the present invention.

[0040] In the figure: 1. collecting tank; 2. liquid extraction tube; 3. exhaust pipe; 4. air duct; 401. first air duct; 402. second air duct; 5. U-shaped tube at the liquid extraction end; 6. U-shaped tube at the exhaust end; 7. electronic air pump; 8. camera; 9. observation window; 10. top cover; 11. bottom cover; 12. processor; 13. annular protrusion; 14. piston; 15. metal block. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation, structure, features and effects of the intelligent device for gastrointestinal fluid decompression proposed by the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0042] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0043] The specific scheme of the intelligent device for gastrointestinal fluid decompression provided by the present invention is described in detail below with reference to the accompanying drawings.

[0044] See also Figure 1 , Figure 2 , Figure 3 , which shows an intelligent device for decompressing gastrointestinal fluid provided by an embodiment of the present invention, the device comprises a collection tank 1, a liquid extraction tube 2, an exhaust pipe 3, a bottom cover 11, a top cover 10, and an electronic air pump 7;

[0045] One end of the suction tube 2 is used to connect with the stomach tube, and the other end is inserted into the collecting tank 1 through the bottom cover 11; one end of the exhaust pipe 3 is inserted into the collecting tank 1 through the bottom cover 11, and the other end is connected to the electronic air pump 7. The outer wall below the bottom cover 11 has a thread, and the inside of the pipe mouth of the collecting tank 1 also has an internal thread that fits with it. The bottom cover 11 and the collecting tank 1 are tightened and fixed together by threads. For example, this structure is disclosed in a gastrointestinal fluid decompression device for gastrointestinal surgery disclosed in CN114404687A, and this embodiment will not be described in detail; in some other embodiments, the bottom cover 11 can be made of rubber material, and the bottom cover 11 can be pressed into the tank mouth of the collecting tank 1 for fixation.

[0046] When the electronic air pump 7 is started, it extracts the gas in the collection tank 1 through the exhaust pipe 3. At the same time, when the electronic air pump 7 extracts the gas in the collection tank 1, the liquid extraction tube 2 can extract the liquid and gas in the patient's stomach and intestines into the collection tank 1 through the gastric tube, thereby reducing the pressure in the stomach and intestines.

[0047] It should be noted that the gastric tube is inserted into the patient's stomach or small intestine by a special nurse, which is a well-known technology, and the structure and use of the gastric tube are not described in detail in this embodiment. When the electronic air pump 7 is not started, the space formed by the collection tank 1, the liquid extraction tube 2, the exhaust pipe 3, the bottom cover 11, and the electronic air pump 7 is airtight.

[0048] Furthermore, a top cover 10 is fixed on the bottom cover 11. In this embodiment, glue is used for fixing. In other embodiments, threads, rivets or buckles may be used for fixing. This embodiment does not limit the specific fixing method.

[0049] The top cover 10 includes an air guide tube 4, a liquid extraction end U-shaped tube 5, and an exhaust end U-shaped tube 6. The air guide tube 4 includes a first air guide tube 401 and a second air guide tube 402. One end of the first air guide tube 401 is connected to the liquid extraction tube 2, and the other end is connected to the liquid extraction end U-shaped tube 5.

[0050] It should be noted that when the first air guide tube 401 is connected to the liquid extraction tube 2, Figure 1 As shown, the diameter of the connecting part of the first air guide tube 401 is smaller than the diameter of the connecting part of the liquid extraction tube 2, and the tube opening of the vertical part of the liquid extraction tube 2 inserted into the collection tank 1 is located on the left side of the tube opening of the first air guide tube 401; the structure of the first air guide tube 401 can ensure that gastrointestinal fluid is prevented from entering the first air guide tube 401. The same is true for the second air guide tube 402.

[0051] The pressure on the left side of the first air guide tube 401 (ie, the side connected to the liquid extraction tube 2 ) can be reflected by the height of the liquid level on the right side of the U-shaped tube 5 at the liquid extraction end.

[0052] One end of the second air guide pipe 402 is connected to the exhaust pipe 3, and the other end is connected to the exhaust end U-shaped tube 6. The pressure on the right side of the second air guide pipe 402 (i.e., the side connected to the exhaust pipe 3) can be reflected by the liquid level on the left side of the exhaust end U-shaped tube 6.

[0053] In summary, the air pressure in the liquid extraction pipe 2 and the exhaust pipe 3 can be represented by the liquid level height on the right side of the U-shaped pipe 5 at the liquid extraction end and on the left side of the U-shaped pipe 6 at the exhaust end.

[0054] The air pressure in the liquid extraction tube 2 and the exhaust tube 3 is an important detection quantity when decompressing the stomach and intestines. In order to visualize the air pressure in the liquid extraction tube 2 and the exhaust tube 3, an observation window 9 is installed in the top cover 10. Through the observation window 9, the liquid level on the right side of the U-shaped tube 5 at the liquid extraction end and the left side of the U-shaped tube 6 at the exhaust end can be observed, which is convenient for medical staff to understand the specific decompression situation during the decompression process. The observation window 9 is a hollow glass box. In other embodiments, the glass box can be filled with transparent media such as water. The specific structure and material of the observation window 9 are not repeated in this embodiment.

[0055] In order to automatically adjust the decompression method according to the patient's specific physiological condition during the decompression process, a camera 8 is installed on one side of the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end in the top cover 10. The field of view of the camera 8 includes the right side of the U-shaped tube 5 at the liquid extraction end and the left side of the U-shaped tube 6 at the exhaust end. During decompression, the camera 8 collects an image of the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at an interval of 1 second. At the same time, the processor 12 installed in the top cover 10 can read the image. At the same time, the processor 12 can control the rotation speed of the electronic air pump 7. The higher the rotation speed of the electronic air pump 7, the greater the air extraction volume.

[0056] It should also be noted that the top cover 10 can be disassembled and replaced.

[0057] Furthermore, considering that the liquid in the U-tube 5 at the pumping end and the U-tube 6 at the exhaust end may leak when subjected to a larger pressure, a piston 14 is placed on the liquid surface at both ends of the U-tube 5 at the pumping end and the U-tube 6 at the exhaust end, and a metal block 15 is placed on the piston 14; the function of the metal block 15 is to prevent the liquid surface from having a large displacement when subjected to a smaller pressure, and to control the height of the liquid surface under unit pressure by changing the weight of the metal block 15.

[0058] In addition, annular protrusions 13 are provided on the inner walls of the pipe openings of the U-shaped pipe 5 at the liquid extraction end and the U-shaped pipe 6 at the exhaust end, and the piston 14 and the annular protrusions 13 work together to prevent liquid leakage.

[0059] The liquid includes water, kerosene or mercury, etc. In other embodiments, liquid pigments can be added for dyeing to facilitate observation.

[0060] The specific working principle of the device is as follows: before decompression, the liquid extraction tube 2 and the exhaust tube 3 are not connected to the stomach tube and the electronic air pump 7, and the collection tank 1 is placed horizontally. The medical staff observes through the observation window 9 whether the liquid levels of the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end are at the same height. If they are not at the same height, it indicates that there is a defect and failure in the top cover 10, and it is replaced. When they are at the same height, the height at this time is recorded as the initial height (the initial height is marked on the observation window 9), the liquid extraction tube 2 is connected to the stomach tube, and the exhaust tube 3 is connected to the electronic air pump 7.

[0061] Before starting the electronic air pump 7, the liquid levels in the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end are the same, which represents the pressure inside the patient's stomach and intestine. The average of the liquid levels in the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at this time is recorded as the initial gastrointestinal pressure index P.

[0062] At this time, the medical staff observes the liquid level heights of the U-tube 5 at the extraction end and the U-tube 6 at the exhaust end through the observation window 9, and compares the difference with the initial height, so that the medical staff can understand the pressure inside the patient's stomach and intestines; then the medical staff starts the electronic air pump 7 at the set initial speed. After the electronic air pump 7 is started, the liquid and gas inside the patient's stomach and intestines are extracted from the body, the liquid is extracted into the collection tank 1, and the gas is discharged through the electronic air pump 7.

[0063] Furthermore, considering that different patients may have different gastrointestinal physiological conditions, the set initial speed may not be suitable for the current patient. The initial speed may be too low to reduce the gastrointestinal pressure in time, or the initial speed may be too high, resulting in gastrointestinal negative pressure, which is not conducive to the patient's recovery. At the same time, continuous decompression time that is too long or too short is not conducive to the patient's recovery.

[0064] In this embodiment, the rotation speed of the electronic air pump 7 is subsequently controlled based on the liquid level heights of the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end, and the electronic air pump 7 is restarted every certain period of time.

[0065] The specific method is:

[0066] The electronic air pump 7 stops starting after a preset time period T1. During the time period T1, the computer program in the processor 12 obtains the gastrointestinal decompression characteristics according to the height of the liquid level in the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end in the image;

[0067] The electronic air pump 7 is started again after a preset time period T2. During the time period T2, the computer program in the processor 12 obtains the gastrointestinal pressure increase characteristics according to the height of the liquid level in the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end in the image;

[0068] The computer program in the processor 12 obtains the rotation speed of the electronic air pump 7 in a preset time period T3 after the time period T2 according to the changing law of the gastrointestinal pressure relief characteristics and the changing law of the gastrointestinal pressure increase characteristics, and restarts the electronic air pump 7 based on the rotation speed in the time period T3;

[0069] During the time period T3, the computer program in the processor 12 obtains the gastrointestinal pressure relief characteristic F according to the heights of the liquid levels in the U-shaped tube 5 at the suction end and the U-shaped tube 6 at the exhaust end in the image; and obtains the stop and start time of the electronic air pump 7 each time it stops and starts after the time period T3 according to the changing law of the gastrointestinal pressure increase characteristic and the changing law of the gastrointestinal pressure relief characteristic F.

[0070] In summary, the above process sequentially passes through time period T1, time period T2, time period T3, and subsequent time periods. The electronic air pump 7 is started in time period T1, stopped in time period T2, started again in time period T3, and the subsequent time periods also repeat the process of starting and stopping. When the patient needs to undergo gastrointestinal decompression for a long time, the pressure of liquid and gas in the patient's stomach can be well reduced.

[0071] For the convenience of description in this embodiment, the heights of the liquid levels in the U-shaped tube 5 (right side) at the liquid extraction end and the U-shaped tube 6 (left side) at the exhaust end are respectively recorded as the liquid extraction end liquid level height and the exhaust end liquid level height.

[0072] In order to obtain the real-time changes of the liquid level height at the pumping end and the liquid level height at the exhaust end, and to subsequently control the rotation speed of the electronic air pump 7, this embodiment uses the gastrointestinal pressure characteristics to roughly describe the physiological conditions of the stomach at each moment.

[0073] As an optional example, the method for obtaining gastrointestinal pressure characteristics includes:

[0074] It is taken into consideration that when the stomach pressure is relatively high (or the stomach produces liquid and gas at a fast speed), or the electronic air pump 7 is insufficient to discharge the gas and liquid, the air pressure in the space formed between the collecting tank 1, the liquid extraction tube 2, the exhaust tube 3, the air duct 4, the U-shaped tube 5 at the liquid extraction end, and the U-shaped tube 6 at the exhaust end is relatively high, and the liquid level height at the liquid extraction end and the liquid level height at the exhaust end are relatively high (higher when compared with the initial height); if the exhaust capacity of the electronic air pump 7 is relatively strong, or the stomach and intestines no longer produce a large amount of liquid or gas (in extreme cases, the stomach or intestinal wall is in contact), the negative pressure in the space formed between the collecting tank 1, the liquid extraction tube 2, the exhaust tube 3, the air duct 4, the U-shaped tube 5 at the liquid extraction end, and the U-shaped tube 6 at the exhaust end is relatively low (lower when compared with the initial height).

[0075] From the above, it can be seen that the liquid level height at the extraction end and the liquid level height at the exhaust end can describe the physiological condition of the patient's gastrointestinal tract (including the production of liquid or gas, or the amount of liquid or gas stored) during the decompression process (that is, under the exhaust capacity of the current electronic air pump 7) to a certain extent. Therefore, the average of the liquid level height at the extraction end and the liquid level height at the exhaust end obtained at each moment is used as the gastrointestinal pressure characteristic.

[0076] As the decompression proceeds, the gastrointestinal pressure characteristics are different at different times, and the gastrointestinal pressure characteristics may also be different at different rotation speeds of the electronic air pump 7 .

[0077] As another optional example, the method for obtaining gastrointestinal pressure characteristics includes:

[0078] During the decompression process, if the difference between the liquid level at the liquid extraction end and the liquid level at the exhaust end is large, it means that the liquid or gas in the stomach can be discharged smoothly and quickly, and the stomach will not be damaged at this time. If the difference between the liquid level at the liquid extraction end and the liquid level at the exhaust end is small, it means that there is basically no gas and liquid that can be discharged inside the stomach, and if the decompression is continued at this time, the stomach may be damaged. Therefore, the difference between the liquid level at the liquid extraction end and the liquid level at the exhaust end can also describe the physiological condition of the patient's stomach during the decompression process (that is, under the exhaust capacity of the current electronic air pump 7) to a certain extent, so the difference between the liquid level at the liquid extraction end and the liquid level at the exhaust end at each moment is used as the gastrointestinal pressure feature.

[0079] As a preferred example, the method for obtaining gastrointestinal pressure characteristics includes:

[0080] The liquid level at the suction end and the liquid level at the exhaust end at each moment are recorded as A and B, and [A, B, AB] is taken as the gastrointestinal pressure characteristic.

[0081] This preferred example describes the gastrointestinal physiological conditions during the decompression process from three aspects: the liquid level height at the extraction end, the liquid level height at the exhaust end, and the height difference between the two, which is more complete and reliable.

[0082] As an optional example, the method for setting time period T1, time period T2, and time period T3 is as follows:

[0083] The medical staff pre-sets the time period lengths of time period T1, time period T2, and time period T3 based on the difference between the liquid level height at the suction end and the liquid level height at the exhaust end and the initial height before the electronic air pump 7 is started. For example, the time period lengths of time period T1, time period T2, and time period T3 are all one minute, that is, starting from the first start of the electronic air pump 7, the first minute is time period T1, the first minute to the second minute is time period T2, and the second minute to the third minute is time period T3.

[0084] As another example, the method for setting the time period T1, the time period T2, and the time period T3 is as follows:

[0085] The time period T1, time period T2 and time period T3 are set according to the real-time changes of the liquid level height at the liquid extraction end and the liquid level height at the exhaust end.

[0086] From the first start-up of the electronic air pump 7, as the decompression process proceeds, a gastrointestinal pressure feature is obtained at each moment, all gastrointestinal pressure features of the most recent several moments (for example, 10 moments) are obtained, the mean of these gastrointestinal pressure features is calculated, the Euclidean distance between each of these gastrointestinal pressure features and the mean is calculated, the obtained Euclidean distance is linearly normalized, and the electronic air pump 7 is turned off when the variance of the Euclidean distance after linear normalization is less than the first threshold th1.

[0087] If the value is less than the first threshold value th1, it means that the gastrointestinal pressure characteristics no longer change significantly, indicating that the liquid or gas in the stomach may have been completely extracted and the stomach will not produce more liquid or gas in a short time. At this time, it is necessary to stop the decompression to avoid damaging the stomach. This embodiment is described by taking th1=0.3 as an example, and other embodiments can be set to other values, which are not specifically limited in this embodiment. At this time, the time period from starting the electronic air pump 7 to stopping the electronic air pump 7 is taken as the time period T1.

[0088] It should be noted that the above process is performed only when there are 10 moments in the front, wherein every 1 second is recorded as a moment, and a gastrointestinal pressure feature is obtained at each moment. If there are less than 10 moments, only the gastrointestinal fluid extraction process is performed, and the acquisition process of the above time period T1 is not performed (that is, when there are less than 10 moments, the gastrointestinal fluid extraction is always performed, and the electronic air pump 7 does not need to be turned off).

[0089] At this time, the medical staff indirectly sets the time period T1 by setting th1, so that the time period T1 can meet the specific physiological conditions of the patient's stomach and intestines, avoiding damage to the stomach and intestines.

[0090] After the time period T1, the electronic air pump 7 is turned off, and the average of the liquid level height at the suction end and the liquid level height at the exhaust end is recorded in real time. When the average is greater than th2×100% of the initial gastrointestinal pressure index P, the electronic air pump 7 is started again.

[0091] At this time, the time period after time period T1 to the time period when the electronic air pump 7 is turned on again is time period T2, that is, the medical staff indirectly sets time period T2 by setting th2. This embodiment is described by taking th2=0.6 as an example, and other embodiments can be set to other values.

[0092] When the electronic air pump 7 is started again, the time period T3 is obtained by using the method of obtaining the time period T1, that is, the electronic air pump 7 continues to work in the time period T3 after the time period T2, and stops working again after the time period T3.

[0093] So far, another method for setting the time period T1, the time period T2, and the time period T3 has been provided. This embodiment does not limit the method for setting the time period T1, the time period T2, and the time period T3.

[0094] It should be noted that, in the present embodiment, time period T1 is a decompression process, and therefore the gastrointestinal pressure characteristics at each moment in time period T1 are recorded as gastrointestinal pressure relief characteristics; there is no decompression in time period T2, and liquid and gas may be generated inside the patient's stomach and intestines, and therefore the gastrointestinal pressure characteristics at each moment in time period T2 are recorded as gastrointestinal pressure increase characteristics; the gastrointestinal pressure characteristics at each moment in time period T3 are recorded as gastrointestinal pressure relief characteristics F.

[0095] As a preferred example, according to the changing law of the gastrointestinal pressure relief characteristics and the changing law of the gastrointestinal pressure increase characteristics, the speed of the electronic air pump 7 in the preset time period T3 after the time period T2 is obtained, including the method of:

[0096] For any one of the time periods T1 and T2, the gastrointestinal pressure characteristics at all times within the time period are reduced to one dimension using the PCA algorithm. The one-dimensional reduction result is recorded as the pressure index, and the time series sequence composed of all pressure indicators is used as the pressure change law.

[0097] The pressure variation law corresponding to the time period T1 is recorded as the variation law of the gastrointestinal pressure relief characteristic, and the pressure variation law corresponding to the time period T2 is recorded as the variation law of the gastrointestinal pressure increase characteristic.

[0098] The changing pattern of the gastrointestinal pressure relief characteristics is divided into several subsequences, which are recorded as subsequences L1, and the interval formed by the first pressure index and the last pressure index in each subsequence L1 is obtained, which is recorded as the index interval K1 of each subsequence L1;

[0099] For the pressure index in the variation law of the gastrointestinal pressure increase feature, the pressure index in the index interval K1 is also taken as a subsequence, and then the variation law of the gastrointestinal pressure increase feature is also divided into several subsequences, which are recorded as subsequence L2;

[0100] At this time, each subsequence L2 corresponds to a subsequence L1, and the two corresponding subsequences have the same pressure index value range.

[0101] In particular, considering the possible interference of noise, when obtaining the index interval K1 and the subsequence L2, it is necessary to perform Gaussian filtering on the subsequence L1 and the gastrointestinal pressure increase characteristic change law, and then obtain the index interval K1 according to the filtered subsequence L1, and obtain the subsequence L2 according to the filtered gastrointestinal pressure increase characteristic change law. The length of the Gaussian filter kernel used in this embodiment is 5, and other embodiments may use filter kernels of other lengths or use other filtering methods.

[0102] The rotation speed at each moment in subsequence L2 is obtained according to the correlation between subsequence L2 and the corresponding subsequence L1 and the difference in time length between subsequence L2 and the corresponding subsequence L1, and the rotation speed at all moments in all subsequences L2 in the gastrointestinal pressure increase characteristic change law is used as the rotation speed of the electronic air pump 7 in the time period T3.

[0103] As an optional example, the changing rules of gastrointestinal pressure relief characteristics are divided into several subsequences, including the following methods:

[0104] Divide the gastrointestinal pressure relief characteristic change law into several sequences (for example, 6 sequences), and the length of each subsequence is the same. If it cannot be divided equally, delete the first few pressure indicators in sequence so that the gastrointestinal pressure relief characteristic change law can be divided equally.

[0105] As a preferred example, the changing rules of gastrointestinal pressure relief characteristics are divided into several subsequences, including the following methods:

[0106] The first-order difference of the changing law of gastrointestinal pressure relief characteristics is performed to obtain a difference sequence, and the difference values ​​in the difference sequence are linearly normalized. The difference values ​​after linear normalization with a value greater than 0.4 are recorded as abnormal difference values.

[0107] If the difference between the tth pressure index and the t+1th pressure index in the changing pattern of the gastrointestinal pressure relief characteristics (that is, the difference between the tth pressure index and the t+1th pressure index) is an abnormal difference value, the tth pressure index is used as a segmentation point.

[0108] All segmentation points in the changing pattern of the gastrointestinal pressure relief characteristics divide the changing pattern of the gastrointestinal pressure relief characteristics into multiple subsequences.

[0109] It should be noted that when there is a subsequence whose length is less than 4 (4 may be replaced by other values ​​in other embodiments), the subsequence is spliced ​​to the previous subsequence. If there is no previous subsequence, it is spliced ​​to the next subsequence to avoid the situation where there are too many shorter subsequences due to noise.

[0110] The purpose of dividing the changing rules of gastrointestinal decompression characteristics into several subsequences in this embodiment is to consider that during the decompression process of the wave time period T1, the stomach and intestines have different physiological conditions or physiological stages (such as liquid and gas storage or production, and gastrointestinal peristalsis, etc.) at different decompression stages, and different physiological conditions require different decompression methods. In the above preferred examples, the segmentation points relatively accurately describe the moment when the mutation occurs during the decompression process, indicating that there may be large changes in the physiological conditions of the stomach and intestines. Although the segmentation method in the optional example has a small amount of calculation, it can only roughly describe the different physiological stages that may exist.

[0111] It should be noted that the physiological conditions mentioned in all embodiments of the present invention refer to the physiological conditions of the stomach and intestines during decompression and under the influence of liquid and gas.

[0112] By further analyzing the different physiological stages in the decompression process and the gastrointestinal pressure generation in each specific physiological stage (ie, the subsequence L2 in the gastrointestinal pressure increase characteristic variation law), the rotation speed of the subsequent electronic air pump 7 can be reliably adjusted.

[0113] As an optional example, the rotation speed at each moment in the subsequence L2 is obtained according to the correlation between the subsequence L2 and the corresponding subsequence L1 and the difference in time length between the subsequence L2 and the corresponding subsequence L1, including the following method:

[0114] The Pearson correlation coefficient k between the subsequence L2 and the corresponding subsequence L1 is obtained, and w=(1-k) / 2 is taken as the correlation between the subsequence L2 and the corresponding subsequence L1.

[0115] The Pearson correlation coefficient k is a well-known technology. The larger the k is (that is, the closer it is to 1), the more positively correlated the subsequence L2 and the subsequence L1 are. The smaller the k is (that is, the closer it is to -1), the more negatively correlated the subsequence L2 and the subsequence L1 are. When k is close to 0, it means that the subsequence L2 and the subsequence L1 are not correlated.

[0116] Considering that subsequence L1 is a subsequence of the law of change of gastrointestinal decompression characteristics during decompression, its change law is a decreasing trend; subsequence L2 is a subsequence of the law of change of gastrointestinal pressure increase characteristics, which is an increasing trend, so only the negative correlation between subsequence L2 and subsequence L1 is concerned (that is, only the case when k belongs to the (-1,0) interval is considered). When there is a more obvious negative correlation between subsequence L2 and the corresponding subsequence L1 (that is, the closer k is to -1), it means that the speed during the decompression process of time period T1 is more in line with the physiological characteristics of the gastrointestinal tract to produce liquid and gas, indicating that the speed of the physiological stage of subsequence L1 is appropriate, and w is relatively large at this time. When there is no obvious negative correlation between subsequence L2 and the corresponding subsequence L1, it means that the speed of the physiological stage of subsequence L1 is not appropriate, and w is relatively small at this time.

[0117] It should be noted that the time lengths of the subsequence L2 and the corresponding subsequence L1 may be different. In this case, the shorter one of the two is linearly interpolated to the same length, and then the Pearson correlation coefficient k is calculated.

[0118] The specific method for obtaining the speed V2 at all times corresponding to the subsequence L2 is:

[0119] When w is greater than the second preset correlation coefficient (eg, 0.8), V2 is equal to V0, which means that the speed adjustment is not required and the original speed can be maintained, wherein V0 represents the speed of the electronic air pump 7 in the time period T1.

[0120] When w is less than or equal to the second preset correlation coefficient (for example, 0.8), the speed adjustment needs to be adjusted. When the time length of subsequence L2 is greater than or equal to the time length of the corresponding subsequence L1, it means that the decompression time is too short (decompression is too fast) in the subsequence L1 stage of the decompression process of time period T1. At this time, V2 is set to be equal to V0×(1-10%), that is, V0 is reduced by 10%. When the time length of subsequence L2 is less than the time length of the corresponding subsequence L1, it means that the decompression time is too long (decompression is too slow) in the subsequence L1 stage of the decompression process of time period T1. At this time, V2 is set to be equal to V0×(1+10%), that is, V0 is increased by 10%.

[0121] In other embodiments, the above-mentioned 10% may be replaced by a value in the interval (0, 1), such as 5% or 15%, which is not specifically limited in this embodiment. Similarly, 0.8 may be replaced by other values, which is not specifically limited in this embodiment.

[0122] As a preferred example, the rotation speed at each moment in the subsequence L2 is obtained according to the correlation between the subsequence L2 and the corresponding subsequence L1 and the difference in time length between the subsequence L2 and the corresponding subsequence L1, including the following method:

[0123] The difference between the time length of the subsequence L1 and the time length of the subsequence L2 is obtained, and the ratio of the difference to the time length of the subsequence L1 is recorded as s.

[0124] When w is less than or equal to the second preset correlation coefficient (for example, 0.8):

[0125]

[0126] in, The larger the value is, the less obvious the negative correlation is between subsequence L2 and the corresponding subsequence L1. This means that the speed of subsequence L1 in the physiological stage is more inappropriate and needs to be adjusted. Make adjustments. When it is positive, it means that the decompression time is too long in the subsequence L1 stage of the decompression process in the time period T1. Increase to get V2; when When it is negative, it means that the decompression time is too short in the subsequence L1 stage of the decompression process in the time period T1. Reduce it to get V2, where The larger the absolute value of The larger the adjustment amount.

[0127] The adjustment process can make the rotation speed at each moment in the subsequence L2 use the patient's gastrointestinal physiological condition or physiological stage.

[0128] When w is greater than the second preset correlation coefficient (for example, 0.8):

[0129]

[0130] The purpose is that when w is greater than 0.8, the speed in time period T1 is adapted to the gastrointestinal physiological conditions or physiological stages. Adjust the zoom to get , which can improve the decompression efficiency.

[0131] So far, the rotation speed at each moment corresponding to each subsequence L2 is obtained.

[0132] The rotation speed at each moment corresponding to all subsequences L2 is the rotation speed of the electronic air pump 7 at each moment in the time period T3 predicted at each moment in the time period T2.

[0133] It should be noted that if the length of time period T3 is inconsistent with the length of time period T2, the predicted rotation speed at each moment in time period T2 is linearly interpolated to obtain the rotation speed at each moment in time period T3.

[0134] As an optional example, according to the changing law of the gastrointestinal pressure relief characteristics and the changing law of the gastrointestinal pressure increase characteristics, the speed of the electronic air pump 7 in the preset time period T3 after the time period T2 is obtained, including the method of:

[0135] Obtain the Pearson correlation coefficient between the changing law of gastrointestinal pressure relief characteristics and the changing law of gastrointestinal pressure increase characteristics;

[0136] When the Pearson correlation coefficient is less than a preset coefficient (for example, less than -0.6), the rotation speed of the electronic air pump 7 in the time period T3 is equal to the rotation speed in the time period T1;

[0137] When the Pearson correlation coefficient is greater than or equal to the preset coefficient, if the time length of the gastrointestinal pressure relief characteristic change law is longer than the time length of the gastrointestinal pressure increase characteristic change law, the rotation speed of time period T1 is increased by 10% and used as the rotation speed of the electronic air pump 7 at each moment in time period T3; otherwise, the rotation speed of time period T1 is reduced by 10% and used as the rotation speed of the electronic air pump 7 at each moment in time period T3.

[0138] Regarding the method for acquiring the rotation speed of the electronic air pump 7, this optional example has less calculation amount than the preferred example, but the preferred example has higher accuracy.

[0139] So far, in addition to obtaining the length of the time period T3, the rotation speed at each moment in the time period T3 has also been obtained.

[0140] Next, the electronic air pump 7 is started at the rotation speed at each time in the time period T3.

[0141] As a preferred example, in the time period T3, the gastrointestinal pressure relief feature F is obtained according to the height of the liquid level in the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end in the image; and the stop and start time of the electronic air pump 7 each time it stops and starts after the time period T3 is obtained according to the change law of the gastrointestinal pressure increase feature and the change law of the gastrointestinal pressure relief feature F, including the steps of:

[0142] The gastrointestinal pressure relief feature F is: the gastrointestinal pressure feature at each moment in the time period T3; the changing rule of the gastrointestinal pressure relief feature F is: the pressure changing rule corresponding to the time period T3.

[0143] The Pearson correlation coefficient k1 of the changing law of the gastrointestinal pressure increase characteristic and the changing law of the gastrointestinal pressure relief characteristic F is obtained, and w1=(1-k1) / 2 is used as the correlation between the changing law of the gastrointestinal pressure increase characteristic and the changing law of the gastrointestinal pressure relief characteristic F.

[0144] The time length of the last time period of the electronic air pump 7 stopping and starting before the time period T3 (ie, the time period T2) is recorded as the reference time length Q1 of the next time period of stopping and starting after the time period T3.

[0145] The method for obtaining the time length Q2 of the next stop-start time period after the time period T3 is as follows:

[0146] When w1 is greater than 0.8, the time length Q2 of the time period of the next stop start after the time period T3 is equal to the reference time length Q1.

[0147] When w1 is less than or equal to 0.8, if the time length of time period T3 is greater than the reference time length, it means that the time period when the last electronic air pump 7 stops starting in time period T3 is shorter than the decompression process of time period T3, and Q2=(1+10%)×Q1; if the time length of time period T3 is less than or equal to the reference time length, it means that the time period when the last electronic air pump 7 stops starting in time period T3 is longer than the decompression process of time period T3, and Q2=(1-10%)×Q1;

[0148] In this embodiment, rounding is used to avoid decimal points in Q2.

[0149] The time period after the time period T3 with a time length of Q2 is recorded as the time period T4, and the electronic air pump 7 stops starting during the time period T4.

[0150] The electronic air pump 7 is started again in a time period T5 of the time period T4. The method for obtaining the time period T5 is the same as that of the time periods T1 and T3.

[0151] In a preferred example, the rotation speed in the time period T5 is the same as the rotation speed in the time period T3 .

[0152] An optional example is to obtain the speed of time period T5 in the same way as the method of obtaining the speed of time period T3. When obtaining the speed of time period T3, the gastrointestinal pressure relief characteristic change law of time period T1, the gastrointestinal pressure increase characteristic change law of time period T2, and the speed V0 of the electronic air pump 7 in time period T1 are used; therefore, when obtaining the speed of time period T5, the gastrointestinal pressure relief characteristic change law of time period T3, the gastrointestinal pressure increase characteristic change law of time period T4, and the average speed of the electronic air pump 7 in time period T3 are used. This embodiment will not repeat the specific process.

[0153] Compared with the optional example, the preferred example has a lower accuracy, but has a faster calculation speed.

[0154] The electronic air pump 7 is stopped again in a time period T6 after the time period T5.

[0155] An optional example is that the length of time period T6 is obtained in the same way as the length of time period T2, that is, the average of the liquid level height at the extraction end and the liquid level height at the exhaust end is recorded in real time. When the average is greater than th2×100% of the initial gastrointestinal pressure index P, time period T6 is ended.

[0156] A preferred example is to make the length of time period T6 equal to the length of time period T4.

[0157] As another optional example, the time period T6 is obtained by using the same method as the time period T4. The time period T4 is obtained based on the change law of the gastrointestinal pressure increase characteristic of the time period T2 and the change law of the gastrointestinal pressure relief characteristic F of the time period T3. Therefore, the same method is used to obtain the time period T6 based on the change law of the gastrointestinal pressure increase characteristic of the time period T4 and the change law of the gastrointestinal pressure relief characteristic F of the time period T5.

[0158] Similarly, compared with the optional examples, the preferred example has a lower accuracy, but the calculation speed is fast.

[0159] The same process is repeated until the medical staff decides to end the decompression process and stops starting the electronic air pump 7.

[0160] As an example, a method for obtaining the height of the liquid level in the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end in the image includes:

[0161] First of all, it should be noted that the image only includes the liquid surface on the right side of the U-shaped tube 5 at the liquid extraction end and the left side of the U-shaped tube 6 at the exhaust end, wherein the liquid surface includes the piston 14 and the metal block 15 on the piston 14. Considering that the relative positions of the camera 8 and the right side of the U-shaped tube 5 at the liquid extraction end and the left side of the U-shaped tube 6 at the exhaust end are unchanged, two ROI areas are manually marked in the image in advance, one is the ROI area of ​​the right tube of the U-shaped tube 5 at the liquid extraction end (denoted as R1), and the other is the ROI area of ​​the left tube of the U-shaped tube 6 at the exhaust end (denoted as R2).

[0162] The image is grayed to obtain a grayscale image, and the Hough line detection algorithm is used to obtain all the straight lines and straight line segments in the grayscale image, and all the parallel horizontal straight line segments therein are obtained, and these straight line segments include the piston 14 and the edge of the metal block 15 on the piston 14. The average of the row numbers of the rows where all the horizontal straight line segments in R1 are located is recorded as the height of the liquid level of the U-shaped tube 5 at the liquid extraction end; the average of the row numbers of the rows where all the horizontal straight line segments in R2 are located is recorded as the height of the liquid level of the U-shaped tube 6 at the exhaust end.

[0163] As another example, a method for obtaining the height of the liquid level in the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end in the image includes:

[0164] The grayscale image at the next moment is subtracted from the grayscale image at the previous moment to obtain a differential image (the grayscale value of the pixel whose difference is less than 0 is set to 0); the Hough line detection algorithm is used to obtain all the straight lines and straight line segments in the gray differential image, and then the height of the liquid level of the U-shaped tube 5 at the suction end and the height of the liquid level of the U-shaped tube 6 at the exhaust end are obtained based on the above method. The height of the liquid level obtained at this time is the height of the liquid level of the image at the next moment.

[0165] If no straight line or straight line segment is obtained, it means that the height of the liquid surface has not changed, and the height of the liquid surface at this time is equal to the height of the liquid surface in the image at the previous moment.

[0166] As another optional example, a method for obtaining the height of the liquid level in the U-shaped tube 5 at the liquid extraction end and the U-shaped tube 6 at the exhaust end in the image includes:

[0167] The DeepLabV3 neural network is used to obtain the semantic area formed by the piston 14 and the metal block 15 on the piston 14 in the image. The row where the central pixel point of the semantic area on the left is located is used as the height of the liquid level of the U-shaped tube 5 at the suction end, and the row where the central pixel point of the semantic area on the right is used as the height of the liquid level of the U-shaped tube 6 at the exhaust end.

[0168] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Intelligent equipment for decompression of gastrointestinal fluid, including: A liquid extraction tube (2) and an exhaust tube (3), characterized in that one end of the first air guide tube (401) in the device is connected to the liquid extraction tube (2), and the other end is connected to the liquid extraction end U-shaped tube (5), and one end of the second air guide tube (402) is connected to the exhaust tube (3), and the other end is connected to the exhaust end U-shaped tube (6); an electronic air pump (7) is connected to the exhaust tube (3), and a camera (8) collects images of the liquid extraction end U-shaped tube (5) and the exhaust end U-shaped tube (6); a processor (12) reads the images and controls the electronic air pump (7); The working principle of the device is as follows: the electronic air pump (7) is started, and the electronic air pump (7) stops starting after a preset time period T1, and within the time period T1, the computer program in the processor (12) obtains gastrointestinal pressure relief characteristics based on the height of the liquid level in the U-shaped tube (5) at the liquid extraction end and the U-shaped tube (6) at the exhaust end in the image; the electronic air pump (7) is started again after a preset time period T2, and within the time period T2, the computer program in the processor (12) obtains gastrointestinal pressure increase characteristics based on the height of the liquid level in the U-shaped tube (5) at the liquid extraction end and the U-shaped tube (6) at the exhaust end in the image; The computer program in the processor (12) obtains the rotation speed of the electronic air pump (7) in a preset time period T3 after the time period T2 according to the changing law of the gastrointestinal pressure relief feature and the changing law of the gastrointestinal pressure increase feature, and restarts the electronic air pump (7) based on the rotation speed in the time period T3. In the time period T3, the gastrointestinal pressure relief feature F is obtained according to the height of the liquid level in the U-shaped tube (5) at the suction end and the U-shaped tube (6) at the exhaust end in the image; and the stop and start time of the electronic air pump (7) each time it stops and starts after the time period T3 according to the changing law of the gastrointestinal pressure increase feature and the changing law of the gastrointestinal pressure relief feature F is obtained.

2. The intelligent device for decompressing gastrointestinal fluid according to claim 1, characterized in that: An observation window (9) is provided on one side of the U-shaped tube (5) at the liquid extraction end and the U-shaped tube (6) at the exhaust end.

3. The intelligent device for decompressing gastrointestinal fluid according to claim 1, characterized in that: Pistons (14) are placed on the liquid surfaces of the U-shaped tube (5) at the liquid extraction end and the U-shaped tube (6) at the exhaust end, respectively. A metal block (15) is placed on the piston (14). Annular protrusions (13) are provided inside the tube openings of the U-shaped tube (5) at the liquid extraction end and the U-shaped tube (6) at the exhaust end.

4. The intelligent device for decompressing gastrointestinal fluid according to claim 1, characterized in that: The first air guide tube (401), the second air guide tube (402), the liquid extraction end U-shaped tube (5), the exhaust end U-shaped tube (6), the camera (8), and the processor (12) are all installed in a replaceable top cover (10).

5. The intelligent device for decompressing gastrointestinal fluid according to claim 1, characterized in that: The specific steps for obtaining the gastrointestinal pressure relief feature, the gastrointestinal pressure increase feature, and the gastrointestinal pressure relief feature F are as follows: At any moment in the time periods T1, T2, and T3, images of the U-shaped tube (5) at the liquid extraction end and the U-shaped tube (6) at the exhaust end captured by the camera (8) at the said moment are obtained, and the liquid level A of the U-shaped tube (5) at the liquid extraction end and the liquid level B of the U-shaped tube (6) at the exhaust end are obtained according to the images, and [A, B, AB] is used as the gastrointestinal pressure characteristics at each moment; The gastrointestinal pressure characteristics at each moment in time period T1 are recorded as gastrointestinal pressure relief characteristics, the gastrointestinal pressure characteristics at each moment in time period T2 are recorded as gastrointestinal pressure increase characteristics, and the gastrointestinal pressure characteristics at each moment in time period T3 are recorded as gastrointestinal pressure relief characteristics F.

6. The intelligent device for decompressing gastrointestinal fluid according to claim 5, characterized in that: The specific steps for obtaining the changing law of the gastrointestinal pressure relief feature, the changing law of the gastrointestinal pressure increase feature, and the changing law of the gastrointestinal pressure relief feature F are as follows: For any one of the time periods T1, T2, and T3, the gastrointestinal pressure characteristics at all times within the time period are reduced to one dimension, the one-dimensional dimension reduction result is recorded as the pressure index, and the time series sequence composed of all the pressure indexes is used as the pressure change law; The pressure change law corresponding to time period T1 is recorded as the change law of gastrointestinal pressure relief characteristics, the pressure change law corresponding to time period T2 is recorded as the change law of gastrointestinal pressure increase characteristics, and the pressure change law corresponding to time period T3 is recorded as the change law of gastrointestinal pressure relief characteristics F.

7. The intelligent device for decompressing gastrointestinal fluid according to claim 6, characterized in that: The method of obtaining the rotation speed of the electronic air pump (7) within a preset time period T3 after the time period T2 according to the changing law of the gastrointestinal pressure relief characteristics and the changing law of the gastrointestinal pressure increase characteristics comprises the following specific steps: The changing rules of gastrointestinal pressure relief characteristics are divided into several subsequences, recorded as subsequences L1, and the first pressure index and the last pressure index in each subsequence L1 constitute the index interval K1 of each subsequence L1; For the pressure index in the variation law of the gastrointestinal pressure increase feature, the pressure index in the index interval K1 is also taken as a subsequence, and the variation law of the gastrointestinal pressure increase feature is also divided into several subsequences, which are recorded as subsequences L2; Each subsequence L2 in the variation law of the gastrointestinal pressure-increasing feature corresponds to a subsequence L1 in the variation law of the gastrointestinal pressure-relieving feature; The rotation speed at each moment in the subsequence L2 is obtained based on the correlation between the subsequence L2 and the corresponding subsequence L1 and the difference in time length between the subsequence L2 and the corresponding subsequence L1, and the rotation speed at all moments in all subsequences L2 in the changing law of the gastrointestinal pressure increase characteristic is used as the rotation speed of the electronic air pump (7) in the time period T3.

8. The intelligent device for decompressing gastrointestinal fluid according to claim 6, characterized in that: The method of obtaining the stop-start time of each stop-start of the electronic air pump (7) after the time period T3 according to the change law of the gastrointestinal pressure increase characteristic and the change law of the gastrointestinal pressure relief characteristic F comprises the following specific steps: The Pearson correlation coefficient k1 of the change law of the gastrointestinal pressure increase characteristic and the change law of the gastrointestinal pressure relief characteristic F is obtained, and w1=(1-k1) / 2 is set; the length of the time period T2 is recorded as the reference time length Q1; the stop-start time of the electronic air pump (7) each time it stops and starts after the time period T3 is recorded as Q2, and the method for obtaining Q2 is: When w1 is greater than the first preset correlation coefficient, Q2 is equal to the reference time length Q1; When k1 is less than or equal to the first preset correlation coefficient, if the time length of time period T3 is greater than the reference time length Q1, Q1 is increased by a preset percentage and used as Q2; if the time length of time period T3 is less than or equal to the reference time length Q1, Q1 is decreased by a preset percentage and used as Q2.

9. The intelligent device for decompressing gastrointestinal fluid according to claim 7, characterized in that: The method of obtaining the rotation speed at each moment in the subsequence L2 according to the correlation between the subsequence L2 and the corresponding subsequence L1 and the difference in time length between the subsequence L2 and the corresponding subsequence L1 includes the following specific steps: Obtain the Pearson correlation coefficient k between the subsequence L2 and the corresponding subsequence L1, and use w=(1-k) / 2 as the correlation between the subsequence L2 and the corresponding subsequence L1; Obtaining a difference between the time length of the corresponding subsequence L1 and the time length of the subsequence L2, wherein the ratio of the difference to the time length of the subsequence L1 is denoted as s; The speed of the electronic air pump (7) in the time period T1 is recorded as V0; the speed at each moment in the subsequence L2 is recorded as V2; When w is less than or equal to the second preset correlation coefficient TH2: ; When w is greater than the second preset correlation coefficient TH2: .

10. The intelligent device for decompressing gastrointestinal fluid according to claim 7, characterized in that: The step of dividing the changing rules of the gastrointestinal pressure relief characteristics into several subsequences includes the following specific steps: The changing pattern of gastrointestinal pressure relief characteristics is subjected to first-order difference to obtain a difference sequence, the difference values ​​in the difference sequence are linearly normalized, and the difference values ​​after linear normalization that are greater than the preset difference values ​​are recorded as abnormal difference values; the pressure indicators corresponding to the abnormal difference values ​​are used as segmentation points, and all segmentation points divide the changing pattern of gastrointestinal pressure relief characteristics into several subsequences.

Images