An automatic dredging device for peritoneal dialysis pipeline

Abstract

The present application relates to the technical fields of peritoneal dialysis treatment, and provides an automatic dredging device for peritoneal dialysis pipeline, which comprises a dialysis pipe body, a detachable Y-shaped external connecting pipe is installed at the input end interface of the dialysis pipe body, the output end of the external connecting pipe is divided into two interfaces, one interface is connected with a normal dialysis pipeline, and the other interface is provided with a connecting pipe, a flexible hose is fixedly connected to the input end of the connecting pipe, a fixing seat is fixedly connected to the top of a patch, and a sticky layer is arranged on the bottom side of the patch. The flexible cleaning wire is coated with a silica gel protective layer to avoid damaging the inner wall of the pipeline, a passive blockage early warning is realized by a pure mechanical pressure sensor and a buzzer, the Y-shaped external connecting pipe and the flexible hose constitute a disassembly-free access channel to eliminate the risk of infection, the expansion block is pressed to drive the cleaning wire to change the diameter radially to adapt to different pipe diameters, the trigger piece is linked with a hydraulic medium to realize accurate positioning of the blocked position, and the device is simple to operate and high in safety.

Description

Technical Field

[0001] This invention relates to the field of peritoneal dialysis treatment technology, specifically to an automatic peritoneal dialysis tubing unblocking device. Background Technology

[0002] Peritoneal dialysis is one of the main treatments for end-stage renal disease. Patients receive periodic infusion of dialysate into the peritoneal cavity via a dialysis catheter inserted in the peritoneum. The semi-permeable membrane of the peritoneum facilitates the exchange of substances, removing metabolic waste and excess water. During dialysis, fibrinogen in the dialysate may precipitate, forming fibrin clots, or blood clots and other deposits may appear in the tubing, easily causing blockage of the dialysis catheter or external extension tubing. Blockage not only interrupts treatment but can also impede the flow of dialysate, leading to abdominal pain, drainage difficulties, and in severe cases, surgical catheter replacement, increasing patient suffering and the risk of infection.

[0003] Currently, common clinical methods for treating tubal blockage include manual squeezing and rubbing of the tubing's outer wall, or using heparin, urokinase, or other drugs for thrombolysis. Manual squeezing is inconsistent in effectiveness, entirely dependent on the operator's skill and experience; insufficient force is ineffective, while excessive force can cause tubing rupture or loosening of connections. While thrombolysis has some effect, its efficiency in dissolving refractory fibrin clots is limited, and some patients have contraindications to these drugs. A few mechanical unblocking devices use rigid metal probes, requiring disconnection of the tubing before use, which is cumbersome and carries a risk of infection. The metal probe directly contacts the tubing's inner wall, easily scratching or puncturing it, causing secondary damage. Furthermore, existing unblocking tools generally lack pressure monitoring capabilities, making it difficult for operators to accurately determine whether the blockage has been cleared, often requiring repeated attempts, increasing patient discomfort and treatment interruptions. Therefore, an automated peritoneal dialysis tubing unblocking device is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic peritoneal dialysis tubing unblocking device, which solves the problems of existing unblocking devices having rigid structures that easily damage the inner wall of the tubing, requiring manual disassembly of the tubing which is cumbersome and carries the risk of infection, and lacking pressure monitoring that makes it impossible to accurately determine the blockage status.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An automatic peritoneal dialysis tubing unblocking device includes:

[0007] The dialysis tubing has a detachable Y-shaped external connector installed at its input end. The output end of the external connector has two interfaces: one interface is connected to the normal dialysis tubing, and the other interface is equipped with a connecting tube. The input end of the connecting tube is fixedly connected to a telescopic flexible tube.

[0008] The patch has a fixed base on its top and an adhesive layer on its bottom side for attaching and fixing the patch to the patient's abdominal skin. A fixing clip is fixedly connected to the top right side of the fixing base, and a movable clip is connected to the top left side of the fixing base via an adjustment component. The fixing base can be detachably clamped to the outer wall of the external tube via the fixing clip and the movable clip to fix the tube.

[0009] A pressure detection component is installed on the inner wall of the movable clamp to detect the dialysate pressure in the dialysis tubing in real time, thereby providing early warning of blockage.

[0010] The hand handle has an expansion cavity connected to its inner wall via a drive component. A rotating sleeve is connected to the inner wall of the expansion cavity via an expansion component. A warning chamber indicating blockage is fixedly connected to the left side of the expansion cavity. An outer sleeve is connected to the inner wall of the warning chamber via a warning component. The left side of the warning chamber is sealed to a telescopic hose. A flexible unblocking component is provided at the end of the rotating sleeve.

[0011] Preferably, the adjustment assembly includes an adjustment ring slidably connected to the right side of the fixed base, an adjustment plate fixedly connected to the left side of the adjustment ring, multiple sets of ratchet teeth fixedly connected to both sides of the bottom of the adjustment plate, a reset button slidably connected to the front side of the fixed base, a positioning plate fixedly connected to the rear side of the reset button, and multiple sets of locking blocks adapted to the ratchet teeth of the adjustment plate fixedly connected to the top of the positioning plate. By adjusting the distance between the movable clamp and the fixed clamp, dialysis tubing of different diameters can be adapted.

[0012] Preferably, the left end of the adjustment plate and the rear end of the positioning plate are both provided with springs for resetting, so that the movable clamp can be quickly reset after pressing to unlock the positioning plate.

[0013] Preferably, the pressure detection component includes a pressure sensing element embedded inside the movable clamp, a buzzer embedded outside the movable clamp, and a piezoelectric connecting piece installed between the pressure sensing element and the buzzer. When the pipe wall is blocked, causing the pressure to rise, the pipe wall squeezes the pressure sensing element. After being compressed, the pressure sensing element outputs an electrical signal, which is transmitted to the buzzer via the piezoelectric connecting piece, driving the buzzer to sound an alarm.

[0014] Preferably, the flexible unblocking component includes a fixed sleeve fitted outside the rotating sleeve. The fixed sleeve is a hollow cavity. A guide rod with an inclined guide block is fixedly connected to the middle of the fixed sleeve. An inclined guide groove is formed on the outer wall of the fixed sleeve. A guide groove along the length direction is also formed at the end of the rotating sleeve. A connecting rod is slidably connected in the two guide grooves. A cleaning wire is fixedly connected to the outer wall of the connecting rod. A medical silicone protective layer is fitted on the outer wall of the cleaning wire.

[0015] Preferably, the input end of the outer sleeve is sealed to a protective shell, and the protective shell has a sealed hydraulic medium chamber inside, which is filled with liquid medium. A trigger plate is slidably connected to the left end of the protective shell, and a piston plate is fixedly connected to the right side of the trigger plate. The piston plate is located on the inner wall of the protective shell and is slidably connected to it, and is used to transport the liquid medium through the outer sleeve to the warning chamber. A return spring is installed between the piston plate and the protective shell, which is used to push the trigger plate to extend outward and reset.

[0016] Preferably, the right end of the fixed sleeve is fixedly connected to the left end of the protective shell, the rotating sleeve is rotatably connected to the protective shell, and the rotating sleeve can rotate relative to the fixed sleeve.

[0017] Preferably, the prompting component includes a detection plate fixed to the inner wall of the warning chamber, a pressure sensor plate two is embedded on the outer side of the detection plate, and a pressure indicator light is embedded on the outer wall of the warning chamber. When the trigger plate is squeezed by the blockage, the hydraulic medium pushes the pressure sensor plate two, triggering the pressure indicator light to realize the location prompt of the blockage.

[0018] Preferably, the expansion assembly includes a guide sleeve slidably connected to the inner wall of the expansion cavity. The outer wall of the guide sleeve has an inclined guide groove. The end of the rotating sleeve is embedded in the guide groove through a positioning rod. The upper and lower outer walls of the guide sleeve are fixedly connected to protrusions. The bottom protrusion is slidably connected to an axial groove on the bottom inner wall of the expansion cavity. The outer wall of the top protrusion is slidably connected to an expansion block. The end of the expansion block is fixedly connected to a fixing block. A spring for resetting is provided between the expansion block and the top protrusion. The top inner wall of the expansion cavity has multiple positioning slots adapted to the fixing block.

[0019] Preferably, the driving part includes a planetary gear set installed on the inner wall of the hand handle. The planetary gear set is driven by a micro motor. The driving end of the planetary gear set is connected to a drive shaft. The drive shaft is connected to the expansion cavity through a universal joint, so as to realize the smooth transmission of driving power and adapt to the bending angle of the pipeline.

[0020] This invention provides an automatic unblocking device for peritoneal dialysis tubing. It has the following beneficial effects:

[0021] 1. This invention uses a medical-grade flexible cleaning wire with an outer silicone protective layer. It can naturally bend with the tubing and safely pass through the abdominal wall into the abdominal cavity to break up and remove blockages such as fibrin clots and blood clots from outside the body or inside the abdominal cavity, avoiding damage to the tubing wall. At the same time, by pressing the expansion block, the guide sleeve and spiral guide groove are driven to expand the cleaning wire radially, which can be adapted to different specifications of dialysis tubing, has strong versatility, and reduces medical costs.

[0022] 2. This invention has a pressure sensor embedded inside the movable clamp. When the pipeline pressure rises to a threshold due to blockage, the sensor outputs an electrical signal that drives a buzzer to sound an alarm via a piezoelectric connector, achieving a delay-free early warning. The front end of the unblocking device is equipped with an umbrella-shaped flexible baffle trigger plate. When encountering clumps, it pushes a piston plate to compress the liquid medium, triggering a pressure indicator light to illuminate through the outer tube, indicating that the cleaning wire has reached the blockage position. The operation is simple and suitable for various dialysis environments.

[0023] 3. The Y-shaped external tube of the present invention has a normal dialysis interface and a dredging interface connected in parallel. During daily dialysis, the tubing remains intact and sealed. When blockage occurs, it is only necessary to connect the connecting tube of the dredging handle to the external tube interface for operation. There is no need to disconnect any tubing connection, avoiding repeated disassembly and the introduction of exogenous infection, which meets the requirements of aseptic operation of peritoneal dialysis. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a schematic diagram of the flexible unblocking component of the present invention;

[0026] Figure 3 This is a schematic diagram of the fixing base of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the fixing base of the present invention;

[0028] Figure 5 This is a schematic diagram of the bottom structure of the fixing base of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of the movable clamp of the present invention;

[0030] Figure 7 This is a schematic diagram of the cleaning wire of the present invention;

[0031] Figure 8 This is a schematic diagram of the internal structure of the fixing sleeve of the present invention;

[0032] Figure 9 This is a schematic diagram of the internal structure of the protective shell of the present invention;

[0033] Figure 10 This is a schematic diagram of the internal structure of the expansion cavity of the present invention;

[0034] Figure 11 This is a schematic diagram of the inside of the guide sleeve of the present invention;

[0035] Figure 12 This is a schematic diagram of the inside of the handle of the present invention;

[0036] Figure 13 This is a schematic diagram of the detection plate structure of the present invention.

[0037] The components are as follows: 1. Dialysis tubing; 2. External tubing; 3. Patches; 4. Handle; 5. Telescopic hose; 6. Connecting tube; 7. Fixing base; 8. Adjusting pull ring; 9. Reset button; 10. Fixing clamp; 11. Movable clamp; 12. Pressure sensor plate one; 13. Adjusting plate; 14. Positioning plate; 15. Piezoelectric connecting plate; 16. Buzzer; 17. Drive shaft; 18. Expansion chamber; 19. Warning chamber; 20. Silicone protective layer; 21. Trigger plate; 22. Cleaning wire; 23. Connecting rod; 24. Fixing sleeve; 25. Rotating sleeve; 26. Outer sleeve; 27. Piston plate; 28. Protective shell; 29. ​​Detection plate; 30. Expansion block; 31. Guide sleeve; 32. Planetary gear set; 33. Pressure sensor plate two; 34. Pressure indicator light; 35. Guide rod. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example:

[0040] This invention provides an automatic peritoneal dialysis tubing unblocking device, comprising:

[0041] Please see the appendix Figure 1 and attached Figure 2 Dialysis tubing 1, the input end of dialysis tubing 1 is equipped with a detachable Y-shaped external tube 2, the output end of the Y-shaped external tube 2 is divided into two interfaces, one interface is connected to the normal dialysis tubing, and the other interface is equipped with a connecting tube 6, the input end of the connecting tube 6 is fixedly connected to a telescopic flexible tube 5.

[0042] Specifically, before peritoneal dialysis, medical staff install the input end interface of the Y-shaped external tube 2 onto the dialysis tubing 1. The output end of the external tube 2 has two interfaces: one interface is connected to the normal dialysis tubing for the routine inflow and outflow of dialysis fluid, and the other interface is used to install the connecting tube 6, which is rotatably connected to the interface. The output end of the external tube 2 has a latex film section that expands outward due to the pressure inside the tubing when the tubing is blocked. The input end of the connecting tube 6 is fixedly connected to a telescopic hose 5, and the other end of the telescopic hose 5 is sealed to the warning chamber 19 at the front end of the hand handle 4, together forming the unblocking operation channel.

[0043] Please see the appendix Figure 3 - Appendix Figure 5The patch 3 has a fixed base 7 at its top and an adhesive layer on its bottom side for attaching and fixing it to the patient's abdominal skin. A fixing clip 10 is fixedly connected to the top right side of the fixing base 7, and a movable clip 11 is connected to the top left side of the fixing base 7 via an adjustment assembly. The fixing base 7 can be detachably clamped to the outer wall of the dialysis tubing 1 and the external tubing 2 via the fixing clip 10 and the movable clip 11, thus fixing the tubing. The adjustment assembly includes an adjustment ring 8 slidably connected to the right side of the fixing base 7, and a fixed component is connected to the left side of the adjustment ring 8. Adjustment plate 13 has multiple sets of ratchet teeth fixedly connected to both sides of its bottom. Reset button 9 is slidably connected to the front side of fixed base 7. Positioning plate 14 is fixedly connected to the rear side of reset button 9. Multiple sets of locking blocks that match the ratchet teeth of adjustment plate 13 are fixedly connected to the top of positioning plate 14. By adjusting the distance between movable clamp 11 and fixed clamp 10, dialysis tubing of different diameters can be adapted. Springs for reset are provided at the left end of adjustment plate 13 and the rear end of positioning plate 14. After pressing to unlock positioning plate 14, movable clamp 11 can be quickly reset.

[0044] Specifically, medical staff attach the patch 3 to the patient's abdominal skin via its adhesive layer. During fixation, the medical staff pulls the adjusting ring 8 of the fixation base 7 upwards. The adjusting ring 8 moves the adjusting plate 13 to the left. Multiple sets of ratchet teeth on both sides of the bottom of the adjusting plate 13 engage unidirectionally with the locking block on the top of the positioning plate 14, pushing the movable clamp 11 towards the fixed clamp 10. The distance between the movable clamp 11 and the fixed clamp 10 gradually decreases, thereby clamping the latex film section of the external tube 2 and fixing the dialysis tubing. The engagement between the positioning plate 14 and the adjusting plate 13 prevents the movable clamp 11 from retracting and loosening, ensuring the stability of the tubing during operation. If it is necessary to loosen the tubing, the medical staff presses the reset button 9, which pushes the positioning plate 14. The positioning plate 14 moves backward, and the locking block on the top of the positioning plate 14 disengages from the ratchet of the adjusting plate 13. Both the left end of the adjusting plate 13 and the rear end of the positioning plate 14 are provided with springs for resetting. The first reset spring is located between the left end of the adjusting plate 13 and the inner wall of the left side of the fixed seat 7. This spring is compressed and stores energy when the adjusting ring 8 is pulled. When the positioning plate 14 is unlocked, it pushes the adjusting plate 13 to reset to the right. The second reset spring is located between the rear end of the positioning plate 14 and the inner wall of the rear side of the fixed seat 7. This spring always pushes the positioning plate 14 forward, so that its locking block is engaged with the ratchet of the adjusting plate 13. After pressing to unlock the positioning plate 14, the movable clamp 11 can be quickly reset. The adjusting plate 13 and the movable clamp 11 retract quickly under the action of the spring reset force, releasing the clamp on the pipeline.

[0045] Please see the appendix Figure 6The pressure detection component includes a pressure sensing element 12 embedded inside the movable clamp 11, a buzzer 16 embedded outside the movable clamp 11, and a piezoelectric connecting piece 15 installed between the pressure sensing element 12 and the buzzer 16. When the pipe wall is blocked, causing the pressure to rise, the pipe wall squeezes the pressure sensing element 12. After being compressed, the pressure sensing element 12 outputs an electrical signal, which is transmitted to the buzzer 16 through the piezoelectric connecting piece 15, driving the buzzer 16 to sound an alarm.

[0046] Specifically, when the dialysate is flowing normally, the pressure sensor 12 is in close contact with the outer wall of the dialysis tubing, and the pressure inside the tubing is within the normal range. The pressure sensor 12 is a thin-film pressure sensor. When the electrical signal output by the pressure sensor 12 is below a preset threshold, the piezoelectric connector 15 has no signal output, and the buzzer 16 does not operate. When fibrin clots or other deposits cause blockage downstream, the internal pressure of the tubing gradually increases, and the wall of the latex film section of the outer tubing 2 expands outward. Under pressure, the internal resistance or capacitance of the pressure sensor 12 changes, and the output electrical signal changes accordingly. As the pressure increases, the signal intensifies. When the output signal exceeds a preset threshold, the electrical signal is transmitted to the buzzer 16 via the piezoelectric connector 15. The buzzer 16 is triggered and emits a buzzing sound to provide a warning of blockage. The buzzer 16 has a built-in drive circuit and oscillator. When it receives an electrical signal exceeding the preset threshold, its internal electronic switch is turned on, connecting the power circuit of the buzzer 16. The buzzer 16 then emits a continuous or pulsed buzzing sound. During this process, the piezoelectric connector 15 only serves as a signal transmission channel, reliably transmitting the output signal of the pressure sensor 12 to the trigger end of the buzzer 16.

[0047] Please see the appendix Figure 10 - Appendix Figure 12The inner wall of the handle 4 is connected to an expansion cavity 18 via a drive section. The drive section includes a planetary gear set 32 ​​mounted on the inner wall of the handle 4. The planetary gear set 32 ​​is driven by a micro motor. The drive end of the planetary gear set 32 ​​is connected to a drive shaft 17. The drive shaft 17 is connected to the expansion cavity 18 via a universal joint, achieving smooth transmission of driving power and adapting to the bending angle of the pipeline. The inner wall of the expansion cavity 18 is connected to a rotating sleeve 25 via an expansion assembly. The expansion assembly includes a guide sleeve 31 slidably connected to the inner wall of the expansion cavity 18. The outer wall of the guide sleeve 31 has an inclined guide groove. The end of the rotating sleeve 25 is embedded in the guide groove via a positioning rod. Both the upper and lower outer walls are fixedly connected to protrusions. The bottom protrusion is slidably connected to the axial groove opened on the bottom inner wall of the expansion cavity 18. The outer wall of the top protrusion is slidably connected to the expansion block 30. The end of the expansion block 30 is fixedly connected to the fixing block, and a spring for resetting is provided between the expansion block 30 and the top protrusion. The top inner wall of the expansion cavity 18 is provided with multiple positioning slots that are adapted to the fixing block. When the expansion block 30 is pressed and pushed to move along the axial groove, the guide sleeve 31 is driven to move axially synchronously. The rotating sleeve 25 is driven to rotate through the spiral guide groove, thereby driving the flexible unblocking component to expand radially. When the fixing block is inserted into the corresponding positioning slot, the expansion diameter is locked.

[0048] Specifically, after hearing the warning sound of buzzer 16, medical staff connect the connecting tube 6 to the external connecting tube 2. The end of the handle 4 has a power interface. By connecting the power to the end of the handle 4, the internal equipment is powered on. The medical staff pushes the flexible unblocking component into the tube wall through the handle 4, and the telescopic hose 5 is compressed accordingly. When the indicator light illuminates, it indicates that the flexible unblocking component has reached the position that needs unblocking. Then, the expansion block 30 on the outer wall of the expansion cavity 18 is pressed. As the expansion block 30 slides, it drives the guide sleeve 31 connected to it to move axially in sync. The outer wall of the guide sleeve 31 has an inclined guide groove. The rear end of the rotating sleeve 25 is embedded in the guide groove through a positioning rod. When the guide sleeve 31 moves axially, its inclined guide groove... A circumferential thrust is generated on the positioning rod, forcing the rotating sleeve 25 to start rotating within the guide sleeve 31, thereby driving the flexible unblocking component to unfold. When the cleaning wire 22 extends to the required diameter, the fixing block at the end of the extension block 30 engages with the corresponding slot on the inner wall of the extension cavity 18, locking the adjusted extension diameter of the cleaning wire 22. Then, the micro motor in the hand handle 4 is activated, driving the planetary gear set 32 ​​to reduce speed and increase torque. The drive end of the planetary gear set 32 ​​is connected to the drive shaft 17, which transmits rotational power to the entire flexible extension component through a universal joint. The universal joint can adapt to the power transmission of the pipeline at different bending angles, ensuring smooth drive, thereby driving the cleaning wire 22 to break up the blockage.

[0049] Please see the appendix Figure 7 - Appendix Figure 9The rotating sleeve 25 has a flexible unblocking component at its end, including a fixed sleeve 24 fitted onto the rotating sleeve 25. The fixed sleeve 24 is a hollow cavity, and a guide rod 35 with an inclined guide block is fixedly connected to the middle of the fixed sleeve 24. An inclined guide groove is formed on the outer wall of the fixed sleeve 24. The rotating sleeve 25 also has a guide groove along its length at its end. A connecting rod 23 is slidably connected in the two guide grooves. A medical-grade flexible titanium alloy cleaning wire 22 is fixedly connected to the outer wall of the connecting rod 23. A medical-grade silicone protective layer 20 is fitted on the outer wall of the cleaning wire 22. When the rotating sleeve 25 rotates, it can drive the connecting rod 23 to move axially, causing the cleaning wire 22 to expand and adapt to pipes of different diameters. At the same time, the silicone protective layer 20 can prevent the cleaning wire 22 from scratching the inside of the pipe. The outer sleeve 26 is sealed to the input end of a protective shell 28. The protective shell 28 has a sealed hydraulic medium chamber filled with liquid medium, such as medical-grade silicone oil or saline. A trigger plate 21 is slidably connected to the left end of the protective shell 28, and a piston plate 27 is fixedly connected to the right side of the trigger plate 21. The piston plate 27 is located on the inner wall of the protective shell 28 and is slidably connected to it, and is used to deliver the liquid medium through the outer sleeve 26 to the warning chamber 19. A reset spring is installed between the piston plate 27 and the protective shell 28 to push the trigger plate 21 outward to reset. The right end of the fixed sleeve 24 is fixedly connected to the left end of the protective shell 28, and the rotating sleeve 25 is rotatably connected to the protective shell 28, and the rotating sleeve 25 can rotate relative to the fixed sleeve 24.

[0050] Specifically, during the expansion and adjustment phase, the rotating sleeve 25 rotates under the drive of the guide sleeve 31. The front end of the rotating sleeve 25 is fitted inside the fixed sleeve 24, which is fixedly connected to the protective shell 28 and remains stationary. When the rotating sleeve 25 rotates inside the fixed sleeve 24, the upper end of the connecting rod 23 slides along the inclined guide groove on the outer wall of the fixed sleeve 24. At the same time, the bottom of the connecting rod 23 slides along the guide rod 35 fixedly connected to the middle of the fixed sleeve 24. The guide rod 35 is provided with an inclined guide block to guide the connecting rod 23 to expand while rotating, so that its outer diameter gradually increases until it fits the inner diameter of the current pipeline. The outer wall of the cleaning wire 22 is fitted with a medical silicone protective layer. 20, during the expansion process, deforms synchronously with the cleaning wire 22, isolating the metal surface of the cleaning wire 22 from direct contact with the inner wall of the pipe during subsequent unblocking operations, preventing scratches to the inner wall of the pipe. During the rotational unblocking stage, the micro motor drives the entire flexible unblocking assembly to rotate continuously through the planetary gear set 32 ​​and the drive shaft 17. The rotational motion is transmitted to the cleaning wire 22 through the connecting rod 23. The cleaning wire 22 rotates rapidly in the pipe, and its outer silicone protective layer 20 rotates together with the cleaning wire 22, forming a flexible rotating agitation surface, which gradually breaks down and crushes the blockage fibrin clots. The crushed blockage particles mix with the dialysis fluid in the pipe and are discharged from the body along with the waste dialysis fluid during the next drainage operation.

[0051] Please see the appendix Figure 13The inner wall of the warning chamber 19 is connected to the outer sleeve 26 through the prompting component. The left side of the warning chamber 19 is sealed to the telescopic hose 5. The prompting component includes a detection plate 29 fixed to the inner wall of the warning chamber 19. A pressure sensor plate 23 is embedded on the outer side of the detection plate 29. A pressure indicator light 34 is embedded on the outer wall of the warning chamber 19. When the trigger plate 21 is squeezed by the blockage, the hydraulic medium pushes the pressure sensor plate 23, triggering the pressure indicator light 34 to light up, thus realizing the location prompt of the blockage.

[0052] Specifically, when the trigger plate 21 at the rear end of the flexible unblocking component comes into contact with the blockage, the trigger plate 21 is an umbrella-shaped flexible baffle with numerous small holes to allow the dialysate to flow through. Blockages adhering to the tube wall, such as fibrin clots, will block the baffle. The blockage will generate an axial thrust on the trigger plate 21, which will push the piston plate 27 on its right side to slide on the inner wall of the protective shell 28, compressing the hydraulic medium. The hydraulic medium is delivered to the warning chamber 19 through the outer sleeve 26, pushing the pressure sensor plate 33 on the detection plate 29. This triggers the pressure indicator light 34 on the outer wall of the warning chamber 19 to light up, informing medical staff that the cleaning wire 22 has reached the blockage location.

[0053] Working principle:

[0054] During the tubing fixation and pressure monitoring phase, before peritoneal dialysis, the input port of the Y-shaped external connector 2 is installed on the dialysis tubing 1. The dialysis tubing 1 passes through the abdominal wall, with its peritoneal end located inside the patient's abdominal cavity. The external end is connected to the external connector 2. One output port of the external connector 2 is connected to the normal dialysis tubing for routine dialysate inflow and outflow; the other port is fitted with a connecting tube 6. The input end of the connecting tube 6 is fixedly connected to the telescopic hose 5, and the other end of the telescopic hose 5 is sealed to the warning chamber 19 at the front end of the hand handle 4, forming a clearing operation channel. The patch 3 is fixed to the patient's abdominal skin through the bottom adhesive layer. Pulling the adjusting ring 8 upward causes the adjusting plate 13 to move to the left. The multiple sets of ratchet teeth at the bottom of the adjusting plate 13 engage unidirectionally with the locking block at the top of the positioning plate 14, pushing the movable clamp 11 toward the fixed clamp 1. The outer tube 2 is brought closer together, thus fixing the thin film segment at the output end to the patch 3. In the pressure detection assembly, the pressure sensor 12 is attached to the outer wall of the dialysis tube. During normal dialysis, the pressure inside the tube is normal, and its output electrical signal is lower than the preset threshold. The piezoelectric connector 15 has no output, and the buzzer 16 does not work. When fibrin clots or other deposits block the downstream of the tube, the internal pressure of the tube increases. The tube wall of the latex film segment of the outer tube 2 expands outward and squeezes the pressure sensor 12, causing a change in its internal resistance or capacitance value. The output electrical signal increases with the increase in pressure. When the signal exceeds the preset threshold, the electrical signal is transmitted to the buzzer 16 through the piezoelectric connector 15. The buzzer 16 has a built-in drive circuit and oscillator. The internal electronic switch is turned on to connect the power circuit and emit a buzzing sound to realize the blockage warning.

[0055] During the blockage detection and location phase, after hearing the alarm from buzzer 16, medical staff connect the connecting tube 6 to another interface of the external tube 2, and push the flexible unblocking component forward by holding the handle 4. The telescopic hose 5 is compressed, and the flexible unblocking component passes sequentially through the external tube 2 and the external section of the dialysis tube 1. Continuing forward, it can enter the peritoneal section of the dialysis tube 1. When the trigger plate 21 contacts the blockage, the trigger plate 21 is an umbrella-shaped flexible baffle with numerous small holes, allowing the dialysate to flow through, but blocking blockages such as fibrin clots are blocked by the baffle, generating axial thrust, and the trigger plate 21 pushes... The piston plate 27 on its right side slides on the inner wall of the protective shell 28, compressing the liquid medium, such as medical-grade silicone oil or saline, in the sealed chamber inside the protective shell 28. The liquid medium is transported to the warning chamber 19 through the outer sleeve 26, pushing the pressure sensor plate 23 on the detection plate 29. After the pressure sensor plate 23 is pressed, it triggers the pressure indicator light 34 on the outer wall of the warning chamber 19 to light up, informing medical staff that the cleaning wire 22 has reached the blockage position. The unblocking end of the device can be moved in and out of the pipeline through the telescopic hose 5, thereby unblocking the external section and the abdominal section of the pipeline.

[0056] During the preparation and cleaning of the expansion stage 22, when the pressure indicator light 34 illuminates, medical staff press and push the expansion block 30 on the outer wall of the expansion cavity 18. The expansion block 30 slides forward along the axial groove on the inner wall of the top of the expansion cavity 18, causing the guide sleeve 31, which is slidably connected to it, to move axially synchronously. The protrusion at the bottom of the guide sleeve 31 is slidably connected to the axial groove on the inner wall of the bottom of the expansion cavity 18, restricting its circumferential rotation. The outer wall of the guide sleeve 31 has an inclined spiral guide groove. The positioning rod at the end of the rotating sleeve 25 is embedded in the guide groove. When the guide sleeve 31 moves axially, the spiral guide groove generates a circumferential thrust on the positioning rod, forcing the rotating sleeve 25 to rotate within the expansion cavity 18. During rotation, the connecting rod 23 slides along the inclined guide groove on the outer wall of the fixed sleeve 24 and the inclined guide block on the guide rod 35, driving the cleaning wire 22 to expand radially until it fits the inner diameter of the current pipeline. This allows the cleaning wire 22 to adapt to the changes in the inner diameter of different sections of the dialysis tube 1. When the cleaning wire 22 expands to the required diameter, the fixing block at the end of the expansion block 30 engages with the corresponding positioning slot on the top inner wall of the expansion cavity 18, locking the expansion diameter. Then, the micro motor in the hand handle 4 is activated. The motor drives the planetary gear set 32 ​​to reduce speed and increase torque, transmitting the rotational power to the entire flexible unblocking assembly via the drive shaft 17 and the universal joint. The universal joint can adapt to the bending angle of the pipeline, ensuring smooth power transmission.

[0057] During the rotational unblocking and unblocking completion stages, the micro motor drives the rotating sleeve 25 to rotate continuously. The rotational motion is transmitted to the cleaning wire 22 through the connecting rod 23. The cleaning wire 22 is made of medical flexible titanium alloy and has a medical silicone protective layer 20 on its outer wall. When it rotates rapidly in the pipeline, the silicone protective layer 20 rotates with it, forming a flexible rotating agitation surface. Due to the good flexibility and biocompatibility of the cleaning wire 22, it can safely enter the abdominal cavity section of the pipeline, gradually breaking up and crushing the blocked fibrin clots. The crushed blockage particles mix with the dialysis fluid in the pipeline and are discharged from the body along with the waste dialysis fluid during the next drainage operation. The dialysis fluid in the abdominal cavity is discharged through the drainage tube, and the crushed clots will not remain in the abdominal cavity, restoring the pipeline to patency.

[0058] During the withdrawal and reset phase, after the blockage is cleared, the motor stops running, and the entire unblocking device stops rotating. Medical personnel first unlock the expansion block 30. The reset spring between the expansion block 30 and the top protrusion pushes the expansion block 30 back, and the guide sleeve 31 resets accordingly. The rotating sleeve 25 rotates in the opposite direction, and the cleaning wire 22 radially retracts to its minimum diameter. The entire device is withdrawn from the handle 4, and the telescopic hose 5 is stretched and reset. The cleaning wire 22 completely exits the tubing from the abdominal cavity section through the external section. The trigger plate 21 extends forward and resets under the action of the reset spring between the piston plate 27 and the protective shell 28. The piston plate 27 retracts, and the hydraulic medium flows back into the chamber of the protective shell 28. The pressure indicator light 34 goes out. If it is necessary to loosen the tubing clamp, press the reset button 9. The positioning plate 14 moves backward, the locking block disengages from the ratchet of the adjusting plate 13, and the adjusting plate 13 resets to the right under the action of the first reset spring. The movable clamp 11 retracts, releasing the clamp on the tubing. The patch 3 can then be peeled off from the abdominal skin. The entire device returns to a standby state and can be used for the next round of operation or stored away.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic unblocking device for peritoneal dialysis tubing, characterized in that, include: Dialysis tubing (1), the input end interface of the dialysis tubing (1) is equipped with a detachable Y-shaped external tube (2), the output end of the external tube (2) is divided into two interfaces, one interface is connected to the normal dialysis tubing, and the other interface is equipped with a connecting tube (6), the input end of the connecting tube (6) is fixedly connected to a telescopic hose (5). The patch (3) has a fixed base (7) fixedly connected to its top. The patch (3) has an adhesive layer on its bottom side for attaching and fixing the patch (3) to the patient's abdominal skin. The fixed base (7) has a fixed clamp (10) fixedly connected to its top right side. The fixed base (7) has a movable clamp (11) connected to its top left side via an adjustment component. The fixed base (7) can be detachably clamped to the outer wall of the outer tube (2) via the fixed clamp (10) and the movable clamp (11) to fix the tube. Pressure detection component, which is installed on the inner wall of movable clamp (11) for real-time detection of dialysate pressure in dialysis tubing, so as to realize early warning of blockage; Handle (4), the inner wall of the handle (4) is connected to an expansion cavity (18) through a drive part, the inner wall of the expansion cavity (18) is connected to a rotating sleeve (25) through an expansion component, the left side of the expansion cavity (18) is fixedly connected to a warning chamber (19) indicating blockage, the inner wall of the warning chamber (19) is connected to an outer sleeve (26) through a warning component, the left side of the warning chamber (19) is sealed to a telescopic hose (5), and the end of the rotating sleeve (25) is provided with a flexible unblocking component.

2. The automatic peritoneal dialysis tubing unblocking device according to claim 1, characterized in that, The adjustment assembly includes an adjustment ring (8) slidably connected to the right side of the fixed base (7). An adjustment plate (13) is fixedly connected to the left side of the adjustment ring (8). Multiple sets of ratchet teeth are fixedly connected to both sides of the bottom of the adjustment plate (13). A reset button (9) is slidably connected to the front side of the fixed base (7). A positioning plate (14) is fixedly connected to the rear side of the reset button (9). Multiple sets of locking blocks that are adapted to the ratchet teeth of the adjustment plate (13) are fixedly connected to the top of the positioning plate (14). By adjusting the distance between the movable clamp (11) and the fixed clamp (10), dialysis tubing of different diameters can be adapted.

3. The automatic peritoneal dialysis tubing unblocking device according to claim 2, characterized in that, The left end of the adjustment plate (13) and the rear end of the positioning plate (14) are both provided with springs for resetting. After pressing to unlock the positioning plate (14), the movable clamp (11) can be quickly reset.

4. The automatic peritoneal dialysis tubing unblocking device according to claim 1, characterized in that, The pressure detection assembly includes a pressure sensing plate (12) embedded inside the movable clamp (11), and a buzzer (16) embedded outside the movable clamp (11). A piezoelectric connecting piece (15) is installed between the pressure sensing plate (12) and the buzzer (16). When the pipe wall is blocked, causing the pressure to rise, the pipe wall squeezes the pressure sensing plate (12). After being compressed, the pressure sensing plate (12) outputs an electrical signal. The electrical signal is transmitted to the buzzer (16) through the piezoelectric connecting piece (15), driving the buzzer (16) to sound an alarm.

5. The automatic peritoneal dialysis tubing unblocking device according to claim 1, characterized in that, The flexible unblocking component includes a fixed sleeve (24) fitted outside the rotating sleeve (25). The fixed sleeve (24) is a hollow cavity. A guide rod (35) with an inclined guide block is fixedly connected to the middle of the fixed sleeve (24). An inclined guide groove is opened on the outer wall of the fixed sleeve (24). A guide groove along the length direction is also opened at the end of the rotating sleeve (25). A connecting rod (23) is slidably connected in the two guide grooves. A cleaning wire (22) is fixedly connected to the outer wall of the connecting rod (23). A medical silicone protective layer (20) is fitted on the outer wall of the cleaning wire (22).

6. The automatic peritoneal dialysis tubing unblocking device according to claim 1, characterized in that, The outer tube (26) is sealed to the input end of a protective shell (28). The protective shell (28) has a sealed hydraulic medium chamber inside, which is filled with liquid medium. A trigger plate (21) is slidably connected to the left end of the protective shell (28). A piston plate (27) is fixedly connected to the right side of the trigger plate (21). The piston plate (27) is located on the inner wall of the protective shell (28) and slidably connected to it. It is used to transport the liquid medium through the outer tube (26) to the warning chamber (19). A reset spring is installed between the piston plate (27) and the protective shell (28) to push the trigger plate (21) to extend outward and reset.

7. The automatic peritoneal dialysis tubing unblocking device according to claim 5, characterized in that, The right end of the fixed sleeve (24) is fixedly connected to the left end of the protective shell (28), the rotating sleeve (25) is rotatably connected to the protective shell (28), and the rotating sleeve (25) can rotate relative to the fixed sleeve (24).

8. The automatic peritoneal dialysis tubing unblocking device according to claim 1, characterized in that, The prompting component includes a detection plate (29) fixed to the inner wall of the warning chamber (19). A pressure sensor plate (33) is embedded on the outer side of the detection plate (29). A pressure indicator light (34) is embedded on the outer wall of the warning chamber (19). When the trigger plate (21) is squeezed by the blockage, the hydraulic medium pushes the pressure sensor plate (33) to trigger the pressure indicator light (34) to light up, thereby realizing the location prompt of the blockage.

9. The automatic peritoneal dialysis tubing unblocking device according to claim 1, characterized in that, The expansion assembly includes a guide sleeve (31) slidably connected to the inner wall of the expansion cavity (18). The outer wall of the guide sleeve (31) is provided with an inclined guide groove. The end of the rotating sleeve (25) is embedded in the guide groove through a positioning rod. The upper and lower outer walls of the guide sleeve (31) are fixedly connected with protrusions. The bottom protrusion is slidably connected to an axial sliding groove opened on the bottom inner wall of the expansion cavity (18). The outer wall of the top protrusion is slidably connected with an expansion block (30). The end of the expansion block (30) is fixedly connected with a fixing block. A spring for resetting is provided between the expansion block (30) and the top protrusion. The top inner wall of the expansion cavity (18) is provided with multiple positioning slots that are adapted to the fixing block.

10. An automatic peritoneal dialysis tubing unblocking device according to claim 1, characterized in that, The drive unit includes a planetary gear set (32) installed on the inner wall of the hand handle (4). The planetary gear set (32) is driven by a micro motor. The drive end of the planetary gear set (32) is connected to a drive shaft (17). The drive shaft (17) is connected to the expansion cavity (18) through a cross universal joint to achieve smooth transmission of driving power and adapt to the bending angle of the pipeline.

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