Peritoneal dialysis catheter anti-blocking device for nephrology department

Abstract

The invention relates to the technical field of peritoneal dialysis in the nephrology department, and discloses a peritoneal dialysis catheter anti-blocking device in the nephrology department, the peritoneal dialysis catheter anti-blocking device comprises a peritoneal dialysis catheter, an inflow tube and an anti-blocking mechanism are fixedly installed outside the peritoneal dialysis catheter, a rotating shaft is rotatably connected to the interior of a drainage tube, and propeller blades are fixedly installed outside the rotating shaft. An equipment box is fixedly mounted on the right side of the drainage tube, and a micro motor is fixedly mounted in the equipment box. According to the anti-blocking device for the peritoneal dialysis catheter in the nephrology department, when the micro motor drives the rotating shaft to rotate, the propeller blades slowly stir dialysate in the peritoneal dialysis catheter, and a directional vortex is formed; according to the design, liquid flowing is accelerated, protein, blood components and mineral substances are effectively prevented from being adsorbed or precipitated on the tube wall, the problem of blockage caused by standing is solved, meanwhile, the process does not need to depend on drugs, the operation process is simplified, early-stage tiny sediments can be preventively removed, and the catheter is kept unobstructed.

Description

Technical Field

[0001] The present invention relates to the technical field of peritoneal dialysis in nephrology, and specifically to an anti-blocking device for peritoneal dialysis tubes in nephrology. Background Technique

[0002] The peritoneal dialysis tube in nephrology is a medical implant device used for the treatment of patients with chronic renal failure. It is implanted into the patient's abdominal cavity through surgery and uses the semi-permeable membrane property of the peritoneum for periodic perfusion and drainage of dialysis fluid to remove metabolic wastes, excess water in the body, and maintain electrolyte balance. The catheter is usually made of soft silicone or polyurethane materials and has a double-lumen or single-lumen structure. One end is connected to the dialysis fluid infusion system, and the other end extends deep into the abdominal cavity to form a closed extracorporeal-in vivo circulation path, which is a key device for realizing long-term dialysis treatment at home.

[0003] However, after the catheter is implanted, due to the easy adsorption or precipitation of proteins, blood components, and minerals in the peritoneal dialysis fluid on the inner wall of the catheter, and the bending and folding of the catheter caused by the patient's activities or changes in abdominal pressure, the deposition of fibrin, thrombus, and calcified substances on the tube wall is accelerated, ultimately leading to partial or complete blockage of the catheter. The existing technology mainly relies on intermittent urokinase perfusion or manual flushing to remove blockages, but such methods have problems such as high drug dependence, complex operation, and inability to prophylactically remove early tiny deposits. Therefore, we have proposed an anti-blocking device for peritoneal dialysis tubes in nephrology. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides an anti-blocking device for peritoneal dialysis tubes in nephrology, which has the advantage of being able to achieve active physical removal of blockages, and solves the problems that after the catheter is implanted, due to the easy adsorption or precipitation of proteins, blood components, and minerals in the peritoneal dialysis fluid on the inner wall of the catheter, and the bending and folding of the catheter caused by the patient's activities or changes in abdominal pressure, the deposition of fibrin, thrombus, and calcified substances on the tube wall is accelerated, ultimately leading to partial or complete blockage of the catheter. The existing technology mainly relies on intermittent urokinase perfusion or manual flushing to remove blockages, but such methods have problems such as high drug dependence, complex operation, and inability to prophylactically remove early tiny deposits.

[0006] (2) Technical Solutions

[0007] To achieve the above purpose of active physical removal of blockages, the present invention provides the following technical solution: An anti-blocking device for peritoneal dialysis tubes in nephrology, including a peritoneal dialysis tube, an inflow tube and an anti-blocking mechanism are fixedly installed on the outside of the peritoneal dialysis tube, and an outflow tube is movably installed at the bottom of the anti-blocking mechanism;

[0008] The anti-blocking mechanism includes a drainage tube, a rotating shaft, a propeller blade, an equipment box, a micro motor, a first plug connector, a second plug connector, a threaded connector, a threaded connecting pipe, a flexible shaft, a connecting column and a brush ring. A rotating shaft is rotatably connected inside the drainage tube, and a propeller blade is fixedly installed on the outer part of the rotating shaft. An equipment box is fixedly installed on the right side of the drainage tube, and a micro motor is fixedly installed inside the equipment box. A first plug connector and a second plug connector are respectively fixedly installed on the left side and the bottom of the drainage tube. A threaded connector is fixedly installed at one end of the rotating shaft away from the micro motor, and a threaded connecting pipe is threadedly connected inside the threaded connector. A flexible shaft is fixedly installed on the left side of the threaded connecting pipe, a connecting column is fixedly installed on the outer part of the flexible shaft, and a brush ring is installed on the outer part of the flexible shaft through the connecting column.

[0009] Preferably, the number of the propeller blades is three groups. The three groups of propeller blades are all fixedly installed on the outer surface of the rotating shaft, and are evenly distributed among the three groups of propeller blades. The right end of the rotating shaft penetrates through the inner right wall of the drainage tube and is fixedly connected to the output end of the micro motor.

[0010] Preferably, one end of the peritoneal dialysis tube close to the drainage tube is inserted into the first plug connector, and one end of the outflow tube close to the drainage tube is inserted into the second plug connector. A control valve is arranged inside the outflow tube.

[0011] Preferably, one end of the flexible shaft is fixedly connected to the threaded connecting pipe, and the other end of the threaded connecting pipe extends into the peritoneal dialysis tube.

[0012] Preferably, the number of the brush rings is six. The six brush rings are all fixedly installed on the outer part of the flexible shaft, and the outer surfaces of the six brush rings are all attached to the inner wall of the peritoneal dialysis tube. The interval between every two brush rings is 1 centimeter.

[0013] Preferably, the flexible shaft is composed of a nickel-titanium alloy braided core shaft and a medical-grade silicone outer sleeve, and the medical-grade silicone outer sleeve is sleeved on the outer part of the nickel-titanium alloy braided core shaft.

[0014] Preferably, the brush ring is made of medical-grade silicone material, and its surface is plated with a silver ion antibacterial coating. The bristles of the brush ring are 2-3 mm in length and the ends are blunt.

[0015] A using method of an anti-blocking device for a peritoneal dialysis tube in nephrology includes the anti-blocking device for a peritoneal dialysis tube in nephrology, and further includes the following steps:

[0016] S1. Insert and fix the end of the peritoneal dialysis tube to the first plug connector of the anti-blocking mechanism to ensure no leakage at the connection; at the same time, insert the top end of the outflow tube into the second plug connector of the anti-blocking mechanism, and close the outflow tube through the built-in control valve of the second plug connector to form a sealed dialysis fluid circulation channel;

[0017] S2. Turn on the micro motor inside the device box to drive the rotation of the rotating shaft, which drives the propeller blades to slowly agitate the dialysate in the peritoneal dialysis tube, forming a directional eddy current, accelerating the liquid flow, and preventing the adsorption or precipitation of macromolecular substances such as proteins and fibrin on the tube wall during the initial stage of the dialysate due to standing;

[0018] S3. At the same time, drive the threaded connector at the end of the rotating shaft through the micro motor, cooperate with the threaded connecting tube, and the brush ring rotates synchronously with the flexible shaft to gently brush the deposits on the tube wall to prevent the peritoneal dialysis tube from being blocked.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides an anti-blocking device for peritoneal dialysis tubes in nephrology, which has the following beneficial effects:

[0021] 1. For the anti-blocking device for peritoneal dialysis tubes in nephrology, by arranging a rotating shaft with propeller blades inside the drainage tube, when the micro motor drives the rotation of the rotating shaft, the propeller blades slowly agitate the dialysate in the peritoneal dialysis tube, forming a directional eddy current; this design accelerates the liquid flow, effectively prevents the adsorption or precipitation of proteins, blood components and minerals on the tube wall, solves the blocking problem caused by standing, and at the same time, this process does not rely on drugs, simplifies the operation process, can prophylactically remove early tiny deposits, and keeps the catheter unobstructed.

[0022] 2. For the anti-blocking device for peritoneal dialysis tubes in nephrology, six brush rings are installed outside the flexible shaft in the anti-blocking mechanism, and these brush rings rotate synchronously with the flexible shaft to gently brush the deposits on the tube wall; the brush rings are made of medical-grade silicone material and are coated with a silver ion antibacterial coating on the surface to ensure the safety and effectiveness of use; the interval between every two brush rings is 1 cm to ensure full coverage and cleaning of the inner wall of the peritoneal dialysis tube, effectively avoiding the deposition of fibrin, thrombus and calcified substances on the tube wall, thereby reducing the risk of catheter blockage and improving the safety and reliability of treatment. Brief description of the drawings

[0023] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0024] Figure 2 It is a sectional structure schematic diagram of the present invention;

[0025] Figure 3 It is a schematic diagram of the anti-blocking mechanism of the present invention;

[0026] Figure 4 It is the present invention Figure 2 The enlarged schematic diagram at position A in;

[0027] Figure 5 It is the present invention Figure 2 The enlarged schematic diagram at position B in;

[0028] Figure 6 Schematic cross-sectional view of the flexible shaft of the present invention;

[0029] Figure 7 Three-dimensional schematic diagram of the brush ring of the present invention.

[0030] In the figure: 1, peritoneal dialysis tube; 2, inflow tube; 3, anti-blocking mechanism; 301, drainage tube; 302, rotating shaft; 303, propeller blade; 304, equipment box; 305, micro motor; 306, first plug connector; 307, second plug connector; 308, threaded connector; 309, threaded connecting pipe; 310, flexible shaft; 311, connecting column; 312, brush ring; 4, outflow tube. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figure 1-7 , a peritoneal dialysis tube anti-blocking device for nephrology, including a peritoneal dialysis tube 1, an inflow tube 2 and an anti-blocking mechanism 3 are fixedly installed on the outside of the peritoneal dialysis tube 1, and an outflow tube 4 is movably installed at the bottom of the anti-blocking mechanism 3;

[0033] The anti-blocking mechanism 3 includes a drainage tube 301, a rotating shaft 302, a propeller blade 303, an equipment box 304, a micro motor 305, a first plug connector 306, a second plug connector 307, a threaded connector 308, a threaded connecting pipe 309, a flexible shaft 310, a connecting column 311 and a brush ring 312. The rotating shaft 302 is rotatably connected inside the drainage tube 301, and the propeller blade 303 is fixedly installed on the outside of the rotating shaft 302. The right side of the drainage tube 301 is fixedly installed with the equipment box 304, and the micro motor 305 is fixedly installed inside the equipment box 304. The left side and the bottom of the drainage tube 301 are respectively fixedly installed with the first plug connector 306 and the second plug connector 307. The end of the rotating shaft 302 away from the micro motor 305 is fixedly installed with the threaded connector 308, and the threaded connecting pipe 309 is threadedly connected inside the threaded connector 308. The left side of the threaded connecting pipe 309 is fixedly installed with the flexible shaft 310, the connecting column 311 is fixedly installed on the outside of the flexible shaft 310, and the brush ring 312 is installed on the outside of the flexible shaft 310 through the connecting column 311.

[0034] Example 1:

[0035] The structural design of the propeller blade 303 is based on the "vortex generation" principle in hydrodynamics, aiming to accelerate the flow of dialysis fluid through directional vortices and prevent macromolecular substances such as proteins and fibrin from adsorbing or precipitating on the tube wall. The specific principle is as follows:

[0036] The propeller blade 303 consists of three groups of evenly distributed helical blades. The surface of the blades is designed as a streamline curved surface. When the rotating shaft 302 rotates at a low speed, the blades push the dialysis fluid to flow axially along the peritoneal dialysis tube 1. At the same time, due to the inclination angle of the blades, the liquid generates a tangential velocity component on the surface of the propeller blade 303, forming a directional vortex that spirals upward along the tube wall. This vortex has the following characteristics:

[0037] The shear force of the vortex can strip the tiny particles adsorbed on the tube wall and prevent them from aggregating into blocks; the low-speed rotation keeps the liquid in a laminar flow state, avoiding the violent disturbance caused by turbulence.

[0038] The direction of the vortex is consistent with the axial direction of the peritoneal dialysis tube 1, ensuring the continuous unidirectional flow of the dialysis fluid; for example, during the perfusion stage, the vortex can assist the dialysis fluid to enter the abdominal cavity; during the drainage stage, the vortex pushes the liquid back to the outflow tube 4, avoiding deposition caused by standing throughout the process.

[0039] The vortex flow can reduce the "residence time" of the dialysis fluid in the tube and reduce the probability of macromolecules such as proteins attaching to the tube wall due to adsorption force; the low-speed vortex avoids mechanical damage to the peritoneum or the inner wall of the catheter, meeting the safety standards of medical equipment.

[0040] Example 2:

[0041] The free bending ability of the flexible shaft 310 stems from the special properties and composite structure of its core material.

[0042] The material of the nickel-titanium alloy braided core shaft is nickel-titanium alloy, which has superelasticity and shape memory effect. It can still return to its original state when the deformation exceeds 10%. Its crystal structure - the transformation between austenite and martensite realizes elastic deformation through the storage and release of strain energy; for example, when the peritoneal dialysis tube 1 bends due to the change of the patient's body position, the flexible shaft can withstand a maximum bending angle of 120°, and it still maintains its structural integrity after being bent 100,000 times; if excessive deformation occurs, such as accidental folding, when heated to body temperature of 37°C, the alloy can return to its original shape and avoid permanent deformation.

[0043] The material of the medical-grade silicone outer sleeve is silicone. The elastic modulus of silicone is much lower than that of metal, which can absorb the deformation stress and prevent the nickel-titanium alloy core shaft from directly contacting the tube wall and causing frictional damage; the silicone surface has high chemical inertness, reducing the reaction with dialysis fluid or biological tissue, meeting the requirements of the FDA for implant-grade materials.

[0044] The nickel-titanium alloy braided mandrel provides support, and the silicone outer sleeve buffers deformation, making the overall flexibility of the flexible shaft 310 close to that of pure silicone material, while having the tensile strength of metal. The tensile strength of the nickel-titanium alloy is >1000 MPa, ensuring the stable rotation of the brush ring 312 in complex pipelines.

[0045] The free bending ability of the flexible shaft 310 can adapt to the natural bending of the peritoneal dialysis catheter 1 in the abdominal cavity, such as the arc formed by intestinal peristalsis, avoiding blockage or damage to the pipe wall caused by jamming of traditional rigid shafts.

[0046] Example 3:

[0047] The material and structural design of the brush ring 312 need to take into account cleaning efficiency, biosecurity and durability.

[0048] The surface of the silicone bristles of the brush ring 312 is micro-structured, and the friction coefficient is controlled between 0.4 and 0.6, which can not only effectively remove deposits, but also avoid scratching the pipe wall; the Shore hardness of the silicone is 30-50, so that it forms a "surface contact" rather than a "point contact" when contacting the pipe wall, reducing damage caused by local pressure concentration.

[0049] The silver ion antibacterial coating is to deposit Ag+ nanoparticles on the bristle surface through plasma spraying technology, with a thickness of about 100-200 nm. Its antibacterial mechanism is as follows:

[0050] Ag+ destroys the integrity of the bacterial cell membrane and interferes with enzyme systems, such as respiratory enzymes; inhibits bacteria, such as Staphylococcus aureus and Escherichia coli; silver ions are slowly released, with a half-life of about 72 hours, continuously inhibiting biofilm formation and reducing blockage caused by co-deposition of bacteria and proteins.

[0051] When the brush ring 312 rotates at a low speed of 1-5 RPM, the bristles remove the deposits on the pipe wall through rolling friction; for example, after macromolecules such as proteins are loosened by the eddy shear force, the bristles can "sweep" them into the flowing dialysate and finally discharge through the outflow tube 4; the silver ion coating inhibits the co-deposition of bacteria and proteins, reducing the blockage of the bristles of the brush ring 312 by the biofilm; at the same time, the flexibility of the silicone bristles avoids scratches on the pipe wall caused by hard brushes and reduces the risk of leakage.

[0052] In summary, for the anti-clogging device of the peritoneal dialysis tube in the nephrology department, by arranging a rotating shaft 302 with propeller blades 303 inside the drainage tube 301, when the micro-motor 305 drives the rotating shaft 302 to rotate, the propeller blades 303 slowly stir the dialysis fluid in the peritoneal dialysis tube 1 to form a directional eddy current. This design accelerates the liquid flow, effectively prevents the adsorption or precipitation of proteins, blood components, and minerals on the tube wall, solves the clogging problem caused by static settlement. At the same time, this process does not rely on drugs, simplifies the operation process, can prophylactically remove early tiny deposits, and keeps the catheter unobstructed.

[0053] Moreover, for the anti-clogging device of the peritoneal dialysis tube in the nephrology department, six brush rings 312 are installed outside the flexible shaft 310 in the anti-clogging mechanism 3. These brush rings 312 rotate synchronously with the flexible shaft 310 to gently brush away the deposits on the tube wall. The brush rings 312 are made of medical-grade silicone material and are coated with a silver ion antibacterial coating on the surface, ensuring the safety and effectiveness of use. The interval between every two brush rings 312 is 1 centimeter, ensuring full coverage and cleaning of the inner wall of the peritoneal dialysis tube 1, effectively avoiding the deposition of fibrin, thrombus, and calcified substances on the tube wall, thereby reducing the risk of catheter blockage, improving the safety and reliability of treatment, and solving the problem that after the catheter is inserted, due to the easy adsorption or precipitation of proteins, blood components, and minerals in the peritoneal dialysis fluid on the inner wall of the catheter, and the bending and folding of the catheter caused by the patient's activities or changes in abdominal pressure, accelerating the deposition of fibrin, thrombus, and calcified substances on the tube wall, ultimately leading to partial or complete blockage of the catheter. The existing technology mainly relies on intermittent urokinase perfusion or manual flushing to remove the blockage, but such methods have problems such as high drug dependence, complex operation, and inability to prophylactically remove early tiny deposits.

[0054] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing blockage of peritoneal dialysis tubes in nephrology department, comprising a peritoneal dialysis tube (1), characterized in that: An inflow tube (2) and an anti-blocking mechanism (3) are fixedly installed outside the peritoneal dialysis tube (1), and an outflow tube (4) is movably installed at the bottom of the anti-blocking mechanism (3); The anti-blocking mechanism (3) includes a drainage tube (301), a rotating shaft (302), a propeller blade (303), an equipment box (304), a micro motor (305), a first plug connector (306), a second plug connector (307), a threaded connector (308), a threaded connecting pipe (309), a flexible shaft (310), a connecting column (311) and a brush ring (312). A rotating shaft (302) is rotatably connected inside the drainage tube (301). A propeller blade (303) is fixedly installed on the outer surface of the rotating shaft (302). An equipment box (304) is fixedly installed on the right side of the drainage tube (301). A micro motor (305) is fixedly installed inside the equipment box (304). A first plug connector (306) and a second plug connector (307) are respectively fixedly installed on the left side and the bottom of the drainage tube (301). A threaded connector (308) is fixedly installed at one end of the rotating shaft (302) away from the micro motor (305). A threaded connecting pipe (309) is threadedly connected inside the threaded connector (308). A flexible shaft (310) is fixedly installed on the left side of the threaded connecting pipe (309). A connecting column (311) is fixedly installed on the outer surface of the flexible shaft (310). A brush ring (312) is installed on the outer surface of the flexible shaft (310) through the connecting column (311).

2. The anti-blocking device for peritoneal dialysis tube in nephrology department according to claim 1, characterized in that: The number of the propeller blades (303) is three groups. The three groups of propeller blades (303) are all fixedly installed on the outer surface of the rotating shaft (302), and are evenly distributed among the three groups of propeller blades (303). The right end of the rotating shaft (302) penetrates through the inner right wall of the drainage tube (301) and is fixedly connected to the output end of the micro motor (305).

3. The anti-blocking device for peritoneal dialysis tube in nephrology according to claim 1, characterized in that: One end of the peritoneal dialysis tube (1) close to the drainage tube (301) is inserted into the first plug connector (306). One end of the outflow tube (4) close to the drainage tube (301) is inserted into the second plug connector (307). A control valve is arranged inside the outflow tube (4).

4. The anti-blocking device for peritoneal dialysis tube in nephrology department according to claim 1, wherein: One end of the flexible shaft (310) is fixedly connected to the threaded connecting pipe (309), and the other end of the threaded connecting pipe (309) extends into the peritoneal dialysis tube (1).

5. The anti-blocking device for peritoneal dialysis tube in nephrology department according to claim 1, characterized in that: The number of the brush rings (312) is six. The six brush rings (312) are all fixedly installed on the outer surface of the flexible shaft (310), and the outer surfaces of the six brush rings (312) are all attached to the inner wall of the peritoneal dialysis tube (1). The interval between every two brush rings (312) is 1 centimeter.

6. The anti-blocking device for peritoneal dialysis catheter in nephrology according to claim 1, characterized in that: The flexible shaft (310) is composed of a nickel-titanium alloy braided core shaft and a medical-grade silica gel outer sleeve, and the medical-grade silica gel outer sleeve is sleeved on the outer surface of the nickel-titanium alloy braided core shaft.

7. The anti-blocking device for peritoneal dialysis tube in nephrology department according to claim 1, characterized in that: The brush ring (312) is made of medical-grade silica gel material, and its surface is plated with a silver ion antibacterial coating. The bristles of the brush ring (312) are 2 - 3 mm in length and the ends are blunt.

8. A method for using an anti-blocking device for peritoneal dialysis tubes in nephrology, characterized in that, Including the anti-blocking device for the peritoneal dialysis tube in the nephrology department described in claims 1 - 7, the following steps are further included: S1. Insert and fix the end of the peritoneal dialysis tube (1) to the first connector (306) of the anti-clogging mechanism (3) to ensure no leakage at the connection. At the same time, insert the top end of the outflow tube (4) into the second connector (307) of the anti-clogging mechanism (3), and close the outflow tube (4) through the built-in control valve of the second connector (307) to form a sealed dialysis fluid circulation channel. S2. Turn on the micro-motor (305) in the equipment box (304) to drive the rotation of the rotating shaft (302), drive the propeller blade (303) to slowly stir the dialysis fluid in the peritoneal dialysis tube (1), form a directional eddy current, accelerate the liquid flow, and prevent the adsorption or precipitation of macromolecular substances such as proteins and fibrin on the tube wall due to static settlement in the initial stage of the dialysis fluid. S3. At the same time, drive the threaded connector (308) at the end of the rotating shaft (302) by the micro-motor (305), cooperate with the threaded connecting pipe (309), and the brush ring (312) rotates synchronously with the flexible shaft (310) to gently brush the deposits on the tube wall to prevent the peritoneal dialysis tube from being blocked.

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