Low rectal cancer anus protection postoperative stoma excrement reinfusion treatment device

Abstract

The invention relates to a low rectal cancer anus protection postoperative stoma excreta reinfusion treatment device, and belongs to the technical field of medical instruments, the low rectal cancer anus protection postoperative stoma excreta reinfusion treatment device comprises a separation module, a reinfusion module and a core control unit, and the separation module is fixed to one side of the waist of a patient through an adjustable waistband; a peristaltic pump of the feedback module is fixed to the inner side of the thigh of a patient through an adjustable leg fixing belt, a buffer storage device is fixed to the other side of an adjustable waist belt, and a core control unit is worn in front of the chest of the patient through an adjustable shoulder belt. The separation module is used for primarily filtering and centrifugally separating excrement, the feedback module is used for accurately feeding back the purified excrement to the intestinal tract of a patient, and the core control unit is connected with sensors and actuators of all the modules through data buses to control the whole feedback process. The device can accurately control the feedback amount and intestinal pressure, efficiently separate excrement, is convenient to use and maintain, and can promote intestinal function recovery of a patient and improve the living quality of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a device for treating and re-infusing the excrement from a stoma after anus-preserving surgery for low rectal cancer. Background Art

[0002] The anus-preserving surgery for low rectal cancer is an important treatment method for retaining the anal function of patients and improving the quality of life after surgery. The prophylactic stoma after surgery can temporarily divert feces, reduce the pressure on the anastomotic stoma, and lower the risk of serious complications such as anastomotic leakage, creating favorable conditions for the healing of the anastomotic stoma. During this process, reasonable treatment and re-infusion of the excrement from the stoma into the intestine are of great significance for maintaining the intestinal microecological balance, stimulating intestinal peristalsis, and promoting the recovery of the patient's defecation control function.

[0003] However, there are many problems in the current clinical techniques during the process of treating and re-infusing excrement. From the perspective of human physiology, the intestinal capacity and processing ability for feces have a certain threshold, and precise control of the re-infusion volume is extremely crucial. However, most of the existing techniques rely on the experience of medical staff for manual adjustment and lack a precise quantitative control mechanism. If the re-infusion volume is too large, the intestine cannot digest and transport it in time, which will lead to a sharp increase in the pressure in the intestinal lumen, causing the intestinal smooth muscle to over-expand, affecting the normal peristaltic rhythm of the intestine, and even possibly causing serious consequences such as intestinal ischemia and necrosis in severe cases; if the re-infusion volume is too small, the intestine cannot be given enough stimulation, the intestinal mucosa lacks necessary nutrients and microbial signals, which is not conducive to the normal growth of intestinal villi and the stability of the intestinal flora, hinders the recovery process of intestinal function, and ultimately affects the reconstruction of the patient's defecation control function. Moreover, the instability of intestinal pressure during the re-infusion process will also interfere with the normal regulation of the defecation reflex by the intestinal nervous system. Excessive pressure activates the pressure receptors in the intestine and triggers an intestinal stress response, while too low pressure cannot effectively stimulate intestinal peristalsis, hindering the propulsion and excretion of intestinal contents.

[0004] In addition, excrement is a complex mixture containing undigested food residues, water, intestinal secretions, microorganisms, and various metabolites. Among them, water, some microorganisms, and metabolites are crucial for maintaining the normal physiological functions of the intestine, while impurities such as undigested food residues may damage the intestine. Most of the existing separation techniques use simple filtration methods and cannot effectively achieve the fine separation of useful components and impurities. The mixing of impurities into the re-infused material will not only reduce the purity of the re-infused material, affect its nourishing and regulating effects on the intestine, but also may carry pathogens such as bacteria and viruses, increasing the risk of intestinal infection, causing complications such as enteritis and intestinal mucosal damage, destroying the normal physiological environment of the intestine, and indirectly having a negative impact on the recovery of defecation control function. At the same time, due to the lack of an efficient separation technique, it is difficult to make full use of the useful components in the excrement, resulting in resource waste and also limiting the improvement of the treatment effect of excrement re-infusion.

[0005] In summary, at present, it is difficult to achieve an ideal effect in the re-infusion and utilization of prophylactic stoma excreta after anal-preserving surgery for low rectal cancer. The rehabilitation process of patients is significantly hindered, and new technical solutions are urgently needed to solve these problems. Summary of the Invention

[0006] In view of this, the object of the present invention is to provide an apparatus for processing and re-infusion of stoma excreta after anal-preserving surgery for low rectal cancer. The apparatus comprises a separation module that simultaneously performs preliminary filtration by a coarse filter screen, centrifugal separation by a centrifugal barrel, and secondary filtration by a fine filter screen; a re-infusion module driven by a motor, which controls a roller extrusion pump through an eccentric wheel mechanism, is equipped with a flow sensor and a pressure sensor to monitor the re-infusion volume and intestinal pressure in real time, and a peristaltic pump with adjustable leg fixing straps for convenient wearing and a buffer storage device with a liquid level sensor to monitor the liquid level; and a core control unit that uses an industrial-grade microcontroller and is connected to each sensor and actuator through a data bus, and is equipped with an operation interface and a display screen for parameter setting and status display, so as to solve the problems in the prior art such as difficult precise control of the re-infusion volume, unstable intestinal pressure, ineffective separation of excreta, inconvenient use and maintenance of the apparatus, and impact on the quality of life of patients.

[0007] The present invention is realized through the following technical solutions:

[0008] An apparatus for processing and re-infusion of stoma excreta after anal-preserving surgery for low rectal cancer, comprising a separation module, a re-infusion module, and a core control unit. The separation module is fixed to one side of the patient's waist through an adjustable waistband. The peristaltic pump in the re-infusion module is fixed to the inner side of the patient's thigh through adjustable leg fixing straps. The buffer storage device in the re-infusion module is fixedly arranged on the other side of the adjustable waistband. The core control unit is worn on the patient's chest through an adjustable shoulder strap. The separation module is connected to the buffer storage device through a connecting pipeline. The core control unit is connected to each sensor and actuator in the separation module and the re-infusion module through a data bus.

[0009] Furthermore, the separation module comprises a coarse filter screen, an inlet pipeline, a centrifugal separation mechanism, a fine filter screen, a connecting pipeline, and an impurity collection box.

[0010] The coarse filter screen is connected to the smaller opening end of the inlet pipeline through a dovetail groove and slot. The larger opening end of the inlet pipeline is tightly nested with the central opening of a medical stoma chassis. The coarse filter screen is used to intercept large-particle impurities. The inlet pipeline is used to connect the stoma chassis and introduce excreta into the separation module, and is installed beside the stoma.

[0011] The centrifugal separation mechanism consists of a motor, a motor bracket, a synchronous belt, a rotating shaft, a centrifugal barrel, a bearing seat, and a high-precision deep groove ball bearing. The motor is fixed to the separation module housing through bolts passing through the mounting holes on the motor bracket. The output shaft of the motor is connected to one end of the synchronous belt, and the other end of the synchronous belt is connected to the pulley on the rotating shaft. One end of the rotating shaft is rigidly connected to the output shaft of the motor through a coupling. The other end of the rotating shaft passes through the two high-precision deep groove ball bearings and is threadedly connected to the bottom of the centrifugal barrel. The motor is located on one side of the centrifugal barrel;

[0012] The fine filter screen is connected to one end of the connecting pipe through a sealing rubber ring and a pipe clamp, and the other end of the connecting pipe is connected to the outlet of the centrifugal separation mechanism through a sealing rubber ring and a pipe clamp;

[0013] The impurity collection box is connected to the bottom of the centrifugal barrel through threads, and an anti-touch housing is fixedly arranged outside the impurity collection box through a bayonet.

[0014] Further, medical sealant is applied at the connection between the inlet pipe and the medical stoma.

[0015] Further, a rubber gasket is arranged inside the impurity collection box, and medical sealant is applied outside the impurity collection box.

[0016] Further, the reinfusion module includes the peristaltic pump, the flow sensor, the pressure sensor, the reinfusion pipe, and the buffer storage device;

[0017] The peristaltic pump includes a motor, a motor base, rollers, pin shafts, snap rings, pump tubes, a pressing device, and a speed reducer. The motor of the peristaltic pump is fixed to the motor base through bolts, and the pump tubes are fixedly arranged between the rollers and the pump head through a spring pressing device;

[0018] The flow sensor is connected to the connecting pipe through a flange. The pressure sensor is fixedly arranged on the reinfusion pipe, and the other end of the reinfusion pipe is fixed to the outlet of the peristaltic pump through a sealing rubber ring and a pipe clamp;

[0019] The buffer storage device is used to temporarily store the separated excrement, and a liquid level sensor is fixedly arranged on the top of the buffer storage device.

[0020] Further, the connecting pipe is connected to the inlet and outlet of the buffer storage device through quick-connect joints.

[0021] Further, the core control unit includes an aluminum alloy control box. The surface of the control box is provided with an operation interface and a display screen, and a shock pad is arranged inside the control box.

[0022] Further, both ends of the adjustable waistband are connected and fixed by Velcro.

[0023] The beneficial effects of the present invention are as follows:

[0024] Through the coordinated operation of the separation module, the reinfusion module and the core control unit, the present invention is conducive to achieving the efficient separation, precise reinfusion and stable control of excreta, effectively removing impurities to improve the purity of the reinfused matter, accurately controlling the reinfusion volume and intestinal pressure, promoting the recovery of intestinal function and microecological balance, and enhancing the defecation control ability of patients.

[0025] Through the combined use of a variety of sensors such as flow sensors, pressure sensors, liquid level sensors and the core control unit, it is conducive to achieving real-time acquisition of multi-dimensional data. The core control unit accurately regulates the operation of each module based on these data, can accurately evaluate the reinfusion effect and the intestinal condition of patients, provides a basis for personalized treatment, and significantly enhances the pertinence and effectiveness of treatment.

[0026] With the intelligent adjustment of the parameters of each module by the core control unit and the real-time feedback function of the operation interface and display screen, it is conducive to dynamically adjusting the treatment plan according to the actual situation of patients, ensuring the safety and stability of the reinfusion process, timely discovering and solving problems, enabling patients to recover intestinal function more efficiently, and improving the quality and efficiency of rehabilitation treatment.

[0027] Relying on the data storage and analysis function and the characteristic of data that can be remotely shared, it is conducive to medical staff remotely monitoring the treatment data and rehabilitation progress of patients, breaking through the limitations of time and space to provide professional guidance, ensuring the continuity and comprehensiveness of treatment, enabling patients to obtain appropriate rehabilitation support in different environments. At the same time, the device can receive updated data, maintain the optimal state of performance and data accuracy, and improve the overall rehabilitation service level. Brief Description of the Drawings

[0028] Figure 1 is the overall assembly structure diagram;

[0029] Figure 2 is the front view of the overall structure;

[0030] Figure 3 is the top view of the overall structure;

[0031] Figure 4 is the sectional view of the overall assembly;

[0032] Figure 5 is the enlarged view of the core control unit.

[0033] Explanation of the Reference Numerals in the Drawings:

[0034] 1. Separation module; 2. Feedback module; 3. Core control unit; 101. Coarse filter; 102. Inlet pipe; 103. Medical sealant; 104. Motor; 105. Motor bracket; 106. Synchronous belt; 107. Rotating shaft; 108. Centrifugal bucket; 109. High-precision deep groove ball bearing; 110. Bearing seat; 111. Fine filter; 112. Connecting pipe; 113. Impurity collection box; 17. Motor; 18. Motor base; 20. Roller; 21. Pin shaft; 22. Snap ring; 23. Pump pipe; 24. Pressing device; 25. Reducer; 26. Flow sensor; 27. Pressure sensor; 28. Feedback pipe; 19. Buffer storage device; 29. Liquid level sensor; 301. Aluminum alloy control box; 302. Operation interface; 303. Display screen. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the above description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "one side", "the other side", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the present invention is usually placed. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0039] In addition, terms such as "identical" do not require the components to be absolutely the same, but there can be slight differences. The term "vertical" only means that the positional relationship between components is more vertical relative to "parallel", and does not mean that the structure must be completely vertical, but can be slightly inclined.

[0040] As Figures 1-5 shown, an embodiment provided by the present invention is a device for treating and reinfusing the excrement from a stoma after sphincter-preserving surgery for low rectal cancer, which includes a separation module 1, a reinfusion module 2, a core control unit 3, etc. Each part works together to efficiently process the excrement and accurately reinfuse it, promoting the recovery of the patient's intestinal function.

[0041] Separation module 1

[0042] The main function of the separation module 1 is to preliminarily filter and centrifuge the excrement discharged from the patient's stoma, remove large particle impurities and part of the moisture, improve the purity of the reinfusion material, and prepare for subsequent reinfusion into the intestine.

[0043] Coarse filter screen 1 and inlet pipe 2: The coarse filter screen 1 is made of 316L stainless steel into a circular sheet shape, with a diameter of about 8 - 10 cm and a central opening aperture of 5 mm. It is connected to the smaller opening end of the inlet pipe 2 through a dovetail groove card slot. This connection method ensures that the coarse filter screen 1 is firmly installed and easy to disassemble and clean. The inlet pipe 2 is a medical-grade plastic cylindrical shape, and the larger opening end is tightly nested with the central opening of the medical stoma chassis. Medical sealant 3 is applied at the connection between the two to ensure the smooth flow of excrement and prevent leakage. The coarse filter screen 1 is installed beside the stoma and can intercept large particle impurities in the excrement, such as undigested food residues, fibers, etc., to avoid these impurities entering the subsequent centrifugal separation mechanism, protect the equipment, and provide a relatively pure raw material for subsequent fine separation.

[0044] Centrifugal separation mechanism:

[0045] Motor 4 and motor bracket 5: The motor 4 uses a brushless DC motor (BLDCM - 500), which is in a cuboid shape, about 10 - 12 cm long, about 6 - 8 cm wide, and about 5 - 7 cm high. The aluminum alloy shell has heat dissipation fins. The motor 4 is fixed to the shell of the separation module 1 through bolts passing through the mounting holes on the motor bracket 5, and is located on one side of the centrifugal barrel 8. The motor bracket 5 is an aluminum alloy L-shaped structure. One side is about 12 - 15 cm long for fixing on the shell of the separation module 1, and the other side is about 8 - 10 cm long for installing the motor 4. The aperture of its mounting hole is about 5 - 6 mm, which can ensure the stability of the motor 4 during operation and provide reliable power for centrifugal separation.

[0046] Synchronous belt 6: The synchronous belt 6 is a ring-shaped belt made of polyurethane with steel wires embedded inside. Its circumference is about 30 - 40 cm, and the belt width is about 2 - 3 cm. One end of it is connected to the output shaft of the motor 4, and the other end is connected to the pulley on the rotating shaft 7, realizing the transmission of power from the motor 4 to the rotating shaft 7, and ensuring the stability and efficiency of power transmission.

[0047] Rotating shaft 7, high-precision deep groove ball bearing 9 and bearing seat 10: The rotating shaft 7 is made of high-strength alloy steel into a cylindrical shape, with a diameter of about 2 - 3 cm and a length of about 15 - 20 cm, and its surface is chrome-plated. One end of the rotating shaft 7 is rigidly connected to the output shaft of the motor 4 through a coupling, and the other end passes through two high-precision deep groove ball bearings 9 and is threadedly connected to the bottom of the centrifugal barrel 8. The high-precision deep groove ball bearing 9 is installed inside the bearing seat 10. The bearing seat 10 is a cast iron semi-cylindrical shape, with a diameter of about 3 - 4 cm and a length of about 8 - 10 cm, providing stable support for the rotating shaft 7 and ensuring the stability of its high-speed rotation, so that the centrifugal barrel 8 can efficiently perform the centrifugal separation work.

[0048] Centrifugal barrel 8: The centrifugal barrel 8 is made of high-strength engineering plastic into a cylindrical shape, with a height of about 15 - 20 cm, a diameter of about 10 - 12 cm, and the barrel wall thickness is 5 mm. There is a spiral guide groove with a spiral angle of 30° inside. Driven by the motor 4, the centrifugal barrel 8 rotates at a high speed, using centrifugal force to separate the water and small particle substances from the impurities in the excrement, so that the water and small particle substances flow along the spiral guide groove to the outlet, while the impurities are concentrated in the center of the barrel.

[0049] Fine filter screen 11 and connecting pipe 12: The fine filter screen 11 is a high-precision nylon circular sheet, with a diameter of about 6 - 8 cm, and the pore diameter is between 0.1 - 0.5 mm. It is connected to one end of the connecting pipe 12 through a sealing rubber ring and a pipe clamp. The connecting pipe 12 is a medical-grade plastic cylindrical shape, with an inner diameter of about 2 - 3 cm, and the length is determined according to the actual installation requirements, generally 20 - 30 cm. The other end of the connecting pipe 12 is connected to the outlet of the centrifugal separation mechanism through a sealing rubber ring and a pipe clamp. The fine filter screen 11 performs secondary filtration on the excrement after centrifugal separation, further removing tiny particles and impurities, and improving the purity of the re-infused substance.

[0050] Impurity collection box 13: The impurity collection box 13 is made of high-strength plastic into a cylindrical shape, with a height of about 8 - 10 cm, a diameter of about 6 - 8 cm, the bottom is flat, and the top opening is connected to the bottom of the centrifugal barrel 8 through a thread. There is a rubber gasket 14 inside it, and medical sealing glue 15 is applied on the outside. An anti-touch shell 16 is fixedly arranged on the outside through a bayonet. During the centrifugal separation process, the impurities fall into the impurity collection box 13, and the double-layer sealing structure effectively prevents the odor from spreading. The anti-touch shell 16 prevents the user from directly contacting the sundries, ensuring the hygiene and safety during the use process.

[0051] Re-infusion module 2

[0052] The function of the reinfusion module 2 is to accurately reinfuse the purified excrement into the patient's intestine, stimulate intestinal peristalsis, maintain the balance of intestinal microecology, and promote the recovery of the patient's fecal control function.

[0053] Peristaltic pump:

[0054] Motor 17 and motor base 18: Motor 17 is a DC geared motor (DC-24V-50RPM), in the shape of a cuboid, about 8-10 cm long, about 5-7 cm wide, and about 4-6 cm high. The surface of the engineering plastic shell has anti-slip texture. Motor 17 is fixed to the motor base 18 by bolts. Motor base 18 is an engineering plastic U-shaped structure. One side is about 10-12 cm long for fixing on the peristaltic pump shell, and the other side is about 8-10 cm long for installing motor 17. The aperture of the mounting hole on motor base 18 is about 4-5 mm, and there is a ribbed structure around the mounting hole to enhance its stability, ensure the stable operation of motor 17, and provide power for the peristaltic pump.

[0055] Roller 20, pin 21 and circlip 22: Roller 20 is a cylindrical made of rubber, with a diameter of about 3-4 cm and a length of about 2-3 cm. The surface has special diamond texture. There are 6 rollers evenly distributed on the circumference of the pump head. Roller 20 is installed on the pump head bracket through pin 21. Pin 21 is made of stainless steel, with a diameter of about 3-4 mm and circlip grooves at both ends. After installing roller 20, use circlip 22 to fix it to prevent roller 20 from axially moving, and ensure that roller 20 can stably squeeze and relax the pump tube 23.

[0056] Pump tube 23 and pressing device 24: Pump tube 23 is a medical-grade flexible silicone cylindrical shape. The inner diameter is customized according to the reinfusion volume requirement, generally 8-12 mm, the wall thickness is 2-3 mm, and the length is determined according to the actual installation requirement, generally 50-80 cm. The two ends of the interface are thickened. Pump tube 23 is fixedly arranged between roller 20 and the pump head through spring pressing device 24. Spring pressing device 24 uses a high-strength stainless steel spring, and the elastic coefficient is accurately calculated to ensure that pump tube 23 will not displace during peristalsis and ensure the stable transportation of excrement.

[0057] Reducer 25: Reducer 25 is a planetary gear reducer, which has the characteristics of small volume, high transmission efficiency and large torque. Motor 17 is connected to the drive shaft of roller 20 through reducer 25 to reduce the speed of motor 17 and increase the torque, so as to drive roller 20 to work, thereby accurately controlling the transportation speed and flow rate of excrement. The peristaltic pump is fixed to the inner side of the patient's thigh, 10-15 cm above the knee, by an adjustable leg fixing belt, which is convenient for the patient to move and does not affect the operation of the device.

[0058] Flow sensor 26: The flow sensor 26 is an electromagnetic flow sensor (EMF200), in the shape of a cuboid, about 10 - 12 cm long, about 6 - 8 cm wide, and about 5 - 7 cm high. It has a stainless - steel shell with flange interfaces at both ends for connecting to pipes, and there are sealing grooves at the flange interfaces. It is connected to the connecting pipe 12 through the flange. When installing, a nitrile rubber gasket is placed at the flange interface and tightened with stainless - steel bolts, flat washers, and spring washers to ensure a tight and sealed connection. The flow sensor 26 is installed on the pipe between the buffer storage device 19 and the peristaltic pump, extending from the waist position to the inner thigh. Its purpose is to monitor the back - infusion flow rate in real - time and transmit the data to the core control unit 3, so that the core control unit 3 can accurately adjust the rotational speed of the peristaltic pump motor 17 according to the preset back - infusion volume, thereby achieving precise control of the back - infusion volume.

[0059] Pressure sensor 27 and back - infusion pipe 28: The pressure sensor 27 is a pressure strain - gauge type sensor (PT124G - 111), in the shape of a cuboid, about 6 - 8 cm long, about 4 - 6 cm wide, and about 3 - 5 cm high. It has a metal shell with an anti - corrosion coating on the surface and a threaded interface at one end. It is connected to a medical - grade silicone three - way joint through the thread, and the three - way joint is thread - connected to the back - infusion pipe 28. An appropriate amount of sealant is applied at the connection for reinforcement. The back - infusion pipe 28 is a medical - grade plastic cylinder with an inner diameter of about 2 - 3 cm, and its length is determined according to the actual installation requirements, generally 30 - 50 cm. The pressure sensor 27 is installed at the end near the anus, and there is a section of transparent material near the pressure sensor 27 for facilitating the observation of the flow of excrement in the pipe. The other end of the back - infusion pipe 28 is fixed to the outlet of the peristaltic pump with a sealing rubber ring and a pipe clamp. The role of the pressure sensor 27 is to monitor the pressure in the intestine in real - time. When the pressure in the intestine is too high, it feeds back the data to the core control unit 3, and the core control unit 3 controls the peristaltic pump to reduce the rotational speed or pause the back - infusion to prevent excessive abdominal pressure from damaging the intestine and ensure the safety and stability of the back - infusion process.

[0060] Buffer storage device 19 and liquid level sensor 29: The buffer storage device 19 is a cylindrical 304 stainless steel container, about 20 - 30 cm high and about 15 - 20 cm in diameter. There are inlets and outlets at the top of the container for connecting the pipelines of the separation module 1 and the reinfusion module 2. There is a transparent observation window made of high-strength plexiglass at the top of the container, which is convenient for observing the internal liquid level. There is a liquid level sensor 29 inside. The liquid level sensor 29 is fixed at the top of the container by threads, and the signal line is led out through the sealed joint at the top of the container. The sealed joint is made of rubber material to ensure good sealing and prevent liquid leakage. There is an adjustable waistband fixing device outside the buffer storage device 19, which consists of two metal rings and an adjustable waistband. The metal rings are welded on both sides of the container. The waistband is made of medical-grade nylon material, about 5 - 8 cm wide, and there are metal buckles at both ends, which can be adjusted according to the patient's waist circumference within the range of 50 - 120 cm. The buffer storage device 19 is fixed on the other side of the patient's waist by the adjustable waistband, slightly higher than the peristaltic pump, and uses the gravity effect to assist the excrement flow towards the peristaltic pump. The connecting pipeline 12 is connected to the inlets and outlets of the buffer storage device 19 through quick-connect joints. The liquid level sensor 29 real-time monitors the liquid level height in the buffer storage device 19 and transmits the data to the core control unit 3. The core control unit 3 coordinates the work of the separation module 1 and the reinfusion module 2 according to the liquid level situation to avoid overflow or emptying of the buffer storage device 19.

[0061] Core control unit 3

[0062] The core control unit 3 uses an industrial-grade microcontroller (STM32F407) and is installed in an aluminum alloy control box 301. The control box 301 is rectangular, about 15 - 20 cm long, about 10 - 15 cm wide, and about 5 - 8 cm high. There is an operation interface 302 and a display screen 303 on the surface for displaying the device operation status and parameter settings. There is a shock pad 304 inside the control box 301 to prevent the microcontroller from being affected by vibration. The control box 301 is worn on the patient's chest through an adjustable shoulder strap 305. The microcontroller is installed on the control circuit board by welding or plug-in methods. The control circuit board is fixed inside the control box 301 and tightened with screws. The plugs of the data bus are connected to the corresponding interfaces of each sensor and actuator. When connecting, align the plug with the interface, gently insert it, ensure that the plug is fully inserted into the interface, and then use the fixing screws to fix the plug. The adjustable shoulder strap 305 is installed on the control box 301 by bolts or buckles, etc. The main function of the core control unit 3 is to collect the data of each sensor in real time through the data bus, including the data of the flow sensor 26, the pressure sensor 27, the liquid level sensor 29, etc., and control the operation of the separation module 1 and the reinfusion module 2 according to the preset programs and algorithms, realizing the intelligent control of the whole device, and ensuring the high efficiency, accuracy and stability of the excrement treatment and reinfusion process.

[0063] Device usage steps

[0064] Device Installation

[0065] Medical staff first clean and disinfect the skin around the patient's stoma to ensure the skin is dry and clean to prevent infection. Stick the medical stoma base plate beside the stoma, tightly nest the larger opening end of the inlet pipe 2 with the central opening of the medical stoma base plate, and apply medical sealant 3 at the connection to ensure that excrement can flow smoothly into the device without leakage. Then install the coarse filter 1 at the smaller opening end of the inlet pipe 2 through the dovetail groove card slot, insert the cotter pin to fix it, so that the coarse filter 1 can effectively intercept large particle impurities.

[0066] Use the adjustable belt to fix the centrifugal separation mechanism on one side of the patient's waist, about 5 - 8 cm above the iliac crest, to ensure the stability of the centrifugal separation mechanism without affecting the patient's activities. Fix the motor 4 on the outer shell of the separation module 1 by passing bolts through the mounting holes on the motor bracket 5, connect the synchronous belt 6, connect the output shaft of the motor 4 with one end of the synchronous belt 6, and connect the other end of the synchronous belt 6 with the pulley on the rotating shaft 7. Rigidly connect one end of the rotating shaft 7 with the output shaft of the motor 4 through a coupling, and the other end passes through two high-precision deep groove ball bearings 9 and is threadedly connected to the bottom of the centrifugal bucket 8 to ensure that the centrifugal bucket 8 can rotate stably and at high speed driven by the motor 4 to achieve the centrifugal separation of excrement.

[0067] Connect the fine filter 11 to one end of the connecting pipe 12 through a sealing rubber ring and a pipe clamp, and connect the other end of the connecting pipe 12 to the outlet of the centrifugal separation mechanism through a sealing rubber ring and a pipe clamp. Extend the connecting pipe 12 from the centrifugal separation mechanism to the buffer storage device 19 along the side of the body, and use medical fixing tape to fix the connecting pipe 12 on the skin to ensure the stable position of the connecting pipe 12 so that the separated excrement can flow smoothly into the buffer storage device 19.

[0068] Fix the buffer storage device 19 on the other side of the patient's waist through the adjustable belt, opposite to the separation module 1. Connect the connecting pipe 12 to the inlet and outlet of the buffer storage device 19 through quick connectors to facilitate the temporary storage and subsequent reinfusion of excrement.

[0069] Fix the peristaltic pump on the inner thigh of the patient, 10 - 15 cm above the knee, through an adjustable leg fixing strap, which is convenient for the patient to move and does not affect the operation of the peristaltic pump. Install the pump tube 23 between the roller 20 and the pump head and fix it through the spring pressing device 24. Connect the flow sensor 26 to the connecting pipe 12 through a flange. One end of the connecting pipe 12 is connected to the outlet of the buffer storage device 19, and the other end is connected to the inlet of the peristaltic pump. Connect the pressure sensor 27 to the medical-grade silicone three-way joint through a thread. The three-way joint is threadedly connected to the return pipe 28. The other end of the return pipe 28 is fixed to the outlet of the peristaltic pump through a sealing rubber ring and a pipe clamp, ensuring that the flow sensor 26 can accurately monitor the return flow rate and the pressure sensor 27 can monitor the intestinal pressure in real time.

[0070] Finally, wear the core control unit 3 on the patient's chest through the adjustable shoulder strap 305, and use the data bus to connect the core control unit 3 to each sensor and actuator in the separation module 1 and the return module 2, ensuring that the core control unit 3 can accurately receive and process the data of each sensor and realize the intelligent control of the entire device.

[0071] Excrement separation

[0072] The patient's excrement enters the inlet pipe 2 through the stoma and first passes through the preliminary filtration of the coarse filter screen 1. The coarse filter screen 1 intercepts large particle impurities such as undigested food residues and fibers, allowing the relatively pure excrement to enter the centrifugal separation mechanism. The core control unit 3 starts the motor 4, the motor 4 drives the synchronous belt 6 to rotate, the synchronous belt 6 drives the rotating shaft 7 to rotate, and then the centrifugal barrel 8 rotates at a high speed. Under the action of centrifugal force, the water and small particle substances in the excrement are thrown towards the barrel wall of the centrifugal barrel 8 and flow along the spiral diversion groove to the outlet, while the impurities are concentrated in the center of the barrel and fall into the impurity collection box 13 at the bottom. The excrement after centrifugal separation is then filtered a second time through the fine filter screen 11 to further remove tiny particles and impurities, and then flows into the buffer storage device 19 through the connecting pipe 12 for temporary storage, preparing for subsequent re-infusion into the intestine.

[0073] Excrement re-infusion

[0074] The core control unit 3 controls the operation of the peristaltic pump according to the data fed back by the flow sensor 26 and the pressure sensor 27. When re-infusion is required, the core control unit 3 sends an instruction to the motor 17 of the peristaltic pump, and the motor 17 drives the roller 20 to rotate through the speed reducer 25. The roller 20 squeezes and relaxes the pump tube 23, so that the excrement in the buffer storage device 19 is transported through the pump tube 23 to the re-infusion pipeline 28. The flow sensor 26 monitors the re-infusion flow rate in real time and transmits the data to the core control unit 3. The core control unit 3 adjusts the rotation speed of the roller 20 by regulating the speed of the motor 17 according to the preset re-infusion volume, so as to accurately control the re-infusion volume to meet the treatment needs of patients at different stages and avoid affecting the recovery of intestinal function due to improper re-infusion volume.

[0075] At the same time, the pressure sensor 27 monitors the pressure in the intestine in real time. When the pressure in the intestine is too high, the core control unit 3 controls the peristaltic pump to reduce the speed or pause the re-infusion to prevent excessive abdominal pressure from damaging the intestine and ensure the safety and stability of the re-infusion process. For example, if the pressure in the intestine approaches or exceeds the upper limit value of 15 cm of water column, the core control unit 3 will respond quickly, reduce the speed of the motor 17, reduce the transport volume of excrement, and resume the normal re-infusion speed after the pressure returns to the normal range (5 - 15 cm of water column).

[0076] Maintenance and Cleaning

[0077] To ensure the normal operation of each component of the device, prevent the growth of bacteria and the accumulation of impurities from affecting the performance of the device and the re-infusion effect, and extend the service life of the device, it is necessary to regularly maintain and clean the device.

[0078] Regularly disassemble the coarse filter screen 1 and the impurity collection box 13 for cleaning and disinfection. Remove the coarse filter screen 1 from the inlet pipeline 2, rinse it thoroughly with clean water, soak it in medical disinfectant for a period of time, then rinse it with clean water and dry it for standby. After the coarse filter screen 1 is cleaned and disinfected, it can maintain good filtering performance and continue to effectively intercept large particle impurities. Unscrew the impurity collection box 13 from the bottom of the centrifugal barrel 8, pour out the impurities in it, rinse it thoroughly with clean water, also soak it in medical disinfectant for disinfection, dry it and install it back in place. Note that when installing, make sure the thread is tightened, the rubber gasket 14 is installed in place, and medical sealant 15 is applied externally to ensure the tightness of the impurity collection box 13 and prevent the odor from emitting.

[0079] Check whether the connection parts of each pipeline are firm, and tighten them in time if there is any looseness. Check the connection conditions of the connection pipeline 12, the re-infusion pipeline 28 and each component, such as whether the pipe clamp is loose, whether the quick-insert joint is tightly connected, etc., to ensure that the connection is well sealed and there is no leakage of excrement. Once any looseness or poor sealing is found, deal with it in time to avoid the leakage of excrement causing device failure or affecting the hygiene of the use environment.

[0080] Regularly perform software updates and hardware inspections on the core control unit 3. Check whether the components on the control circuit board are damaged, loose, etc., and ensure that the data bus connection is normal. Update the software of the core control unit 3 through the operation interface 302 to ensure that it can accurately receive and process the data of each sensor, and precisely control the operation of the separation module 1 and the feedback module 2. For example, software updates may optimize algorithms, improve the accuracy of feedback volume control, or enhance the ability to handle abnormal situations.

[0081] Technical effects of the device

[0082] Precisely control the feedback volume

[0083] The electromagnetic flow sensor 26 monitors the feedback flow rate in real time and feeds the data back to the core control unit 3. The core control unit 3 can accurately adjust the rotation speed of the peristaltic pump motor 17 according to the preset feedback volume, thereby controlling the extrusion frequency and strength of the roller 20 on the pump tube 23, achieving precise control of the feedback volume, and the error can be controlled within ±5%. This precise control can meet the treatment needs of patients at different stages, avoid adverse effects on intestinal function recovery caused by excessive or insufficient feedback volume, and effectively promote the recovery of intestinal function. For example, at the initial stage of the patient's intestinal function recovery, a smaller feedback volume can be precisely controlled. After the intestine adapts, the feedback volume can be gradually increased to exercise and recover the intestinal function step by step.

[0084] Stabilize intestinal pressure

[0085] The pressure strain gauge sensor 27 monitors the intestinal pressure in real time and transmits the data to the core control unit 3. When the intestinal pressure exceeds the normal range (5 - 15 cm of water column), the core control unit 3 can timely adjust the rotation speed of the peristaltic pump, reduce or pause the feedback speed, avoid damage to the intestine caused by excessive abdominal pressure, and ensure that the intestinal pressure is stable within the normal range. This helps to maintain the normal physiological function of the intestine and reduce complications caused by unstable intestinal pressure, such as intestinal stress response, intestinal mucosa damage, etc. The stable intestinal pressure provides a guarantee for the stability of the intestinal internal environment, which is beneficial to the balance of the intestinal microecology and the repair of intestinal tissues.

[0086] Efficiently separate excreta

[0087] The separation module 1 adopts a combination of a coarse filter screen 1, centrifugal separation, and a fine filter screen 11, which can efficiently separate excreta. The coarse filter screen 1 first intercepts large-particle impurities. The centrifugal separation mechanism uses centrifugal force to further separate the water and small-particle substances in the excreta from the impurities. The fine filter screen 11 then performs secondary filtration on the separated liquid to remove tiny particles and impurities. This multi-stage separation method can effectively remove impurities in the excreta, increasing the purity of the reinfusion matter by more than 30%, providing better-quality nutrients and beneficial bacteria for the intestine, helping to maintain the intestinal microecological balance, and promoting intestinal health. The purer reinfusion matter can reduce the digestive burden of the intestine on impurities, lower the risk of intestinal infection, and improve the absorption efficiency of the intestine for nutrients.

[0088] Convenient use and maintenance

[0089] The components of the device adopt a modular design, which is convenient for installation and disassembly. Designs such as adjustable waistbands, adjustable leg fixation straps, and adjustable shoulder straps can be flexibly adjusted according to the patient's body characteristics to ensure comfortable and stable wearing of the device. At the same time, the connection methods between components are simple and reliable, such as quick-insert connectors, threaded connections, and pipe clamp connections, which are convenient for patients or medical staff to operate. In addition, regular maintenance and cleaning work are relatively simple. The coarse filter screen 1 and the impurity collection box 13 are easy to disassemble and clean, and the software update and hardware inspection of the core control unit 3 are also convenient and fast, reducing the use and maintenance costs. Patients can easily complete the installation, use, and daily maintenance of the device under the guidance of medical staff, improving the patient's usage experience and treatment compliance.

[0090] Improve the quality of life of patients

[0091] Through precise reinfusion control and efficient excreta separation, this device can effectively promote the recovery of the patient's fecal control function and reduce the patient's dependence on ostomy bags. Patients can move around more freely in their daily lives, improving the convenience and comfort of life. At the same time, stable intestinal function and a good intestinal microecological environment help to improve the patient's digestion and absorption function, enhance the body's immunity, enabling the patient to recover health faster and return to normal life. In addition, the intelligent control and real-time monitoring functions of the device enable patients and medical staff to timely understand the treatment effect and physical condition, enhancing the patient's treatment confidence and having a positive impact on the patient's mental state. Patients can feel the effectiveness and safety of the treatment during the use of the device, and thus cooperate more actively with the treatment, improving the quality of life.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An apparatus for treating and recycling the excrement from a stoma after sphincter-saving surgery for low rectal cancer, characterized in that: It includes a separation module, a reinfusion module and a core control unit. The separation module is fixed to one side of the patient's waist by an adjustable belt. The peristaltic pump in the reinfusion module is fixed to the inner side of the patient's thigh by an adjustable leg strap. The buffer storage device in the reinfusion module is fixedly arranged on the other side of the adjustable belt. The core control unit is worn on the patient's chest by an adjustable shoulder strap. The separation module is connected to the buffer storage device through a connecting pipe. The core control unit is connected to each sensor and actuator in the separation module and the reinfusion module through a data bus.

2. The anal excretum retransfusion processing device after low rectal cancer anus-preserving surgery according to claim 1, wherein: The separation module includes a coarse filter, an inlet pipe, a centrifugal separation mechanism, a fine filter, a connecting pipe and an impurity collection box. The coarse filter is connected to the smaller opening end of the inlet pipe through a dovetail groove card slot. The larger opening end of the inlet pipe is tightly nested with the central opening of the medical stoma chassis. The coarse filter is used to intercept large particle impurities. The inlet pipe is used to connect the stoma chassis and introduce excrement into the separation module, and is installed beside the stoma. The centrifugal separation mechanism consists of a motor, a motor bracket, a synchronous belt, a rotating shaft, a centrifugal bucket, a bearing seat and a high-precision deep groove ball bearing. The motor is fixed to the outer shell of the separation module by bolts passing through the mounting holes on the motor bracket. The output shaft of the motor is connected to one end of the synchronous belt. The other end of the synchronous belt is connected to the pulley on the rotating shaft. One end of the rotating shaft is rigidly connected to the output shaft of the motor through a coupling. The other end of the rotating shaft passes through the two high-precision deep groove ball bearings and is threadedly connected to the bottom of the centrifugal bucket. The motor is located on one side of the centrifugal bucket. The fine filter is connected to one end of the connecting pipe through a sealing rubber ring and a pipe clamp. The other end of the connecting pipe is connected to the outlet of the centrifugal separation mechanism by a sealing rubber ring and a pipe clamp. The impurity collection box is connected to the bottom of the centrifugal bucket by a thread. An anti-touching shell is fixedly arranged on the outside of the impurity collection box through a bayonet.

3. The anus-preserving stoma excrement retransfusion processing device after low rectal cancer surgery according to claim 2, wherein: Medical sealing glue is applied to the connection between the inlet pipe and the medical stoma.

4. The anus-preserving excrement re-infusion treatment device after low rectal cancer surgery according to claim 2, characterized in that: A rubber sealing pad is arranged inside the impurity collection box, and medical sealing glue is applied to the outside of the impurity collection box.

5. A device for treating and recycling the excrement from a stoma after sphincter-saving surgery for low rectal cancer according to claim 1, characterized in that: The reinfusion module includes the peristaltic pump, a flow sensor, a pressure sensor, a reinfusion pipe and a buffer storage device. The peristaltic pump includes a motor, a motor seat, rollers, pin shafts, snap rings, pump tubes, a pressing device and a speed reducer. The motor of the peristaltic pump is fixed to the motor seat by bolts. The pump tubes are fixed between the rollers and the pump head by a spring pressing device. The flow sensor is connected to the connecting pipe through a flange. The pressure sensor is fixedly arranged on the reinfusion pipe. The other end of the reinfusion pipe is fixed to the outlet of the peristaltic pump by a sealing rubber ring and a pipe clamp. The buffer storage device is used to temporarily store the separated excrement, and a liquid level sensor is fixedly arranged on the top of the buffer storage device.

6. The anus-preserving stoma excrement re-infusion treatment device after low rectal cancer surgery according to claim 5, characterized in that: The connecting pipe is connected to the inlet and outlet of the buffer storage device through quick connectors.

7. The anus-preserving stoma excrement re-infusion treatment device after low rectal cancer surgery according to claim 1, wherein The core control unit includes an aluminum alloy control box. An operation interface and a display screen are arranged on the surface of the control box, and a shock pad is arranged inside the control box.

8. The anus-preserving excrement retransfusion treatment device after low rectal cancer surgery according to claim 1, characterized in that : The two ends of the adjustable belt are connected and fixed by Velcro.

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