A device and system for reducing clotting occlusion of tubing in hemodialysis

Abstract

The application discloses a device for reducing coagulation blockage of pipelines in hemodialysis, comprising an arteriovenous jug and a bracket, a stirring mechanism for preventing blood coagulation is arranged in the jug shell; the stirring mechanism comprises an impeller group, a stirring shaft and a stirring cage; the impeller group comprises an impeller shaft and impeller blades, the upper surface of the impeller blades is a magnetic layer, an electromagnet rotatable through a rotating mechanism is arranged on the bracket, the electromagnet is upwardly rotated through the rotating mechanism and is pressed on the outer wall of the arteriovenous jug, and the polarity of the upper surface of the magnetic layer of the corresponding impeller blade is the same as that of the electromagnet. The impeller group is arranged in the jug shell, the impeller group is located between the liquid surface in the jug shell and the jug cover body, the flow rate of blood entering the jug shell is utilized to start the rotation of the impeller blades, the rotation of the impeller blades is accelerated under the repulsion force generated by the electromagnet, and the rotation of the impeller shaft, the lower stirring shaft and the stirring cage is further driven, so that the blood in the jug shell is stirred, and the phenomenon that the coagulation in the arteriovenous jug blocks the pipelines is avoided.

Description

Technical Field

[0001] This invention relates to a hemodialysis device, specifically to a device and system for reducing blood clotting and tubing blockage during hemodialysis. Background Technology

[0002] Hemodialysis is one of the renal replacement therapies for patients with acute and chronic renal failure. It involves draining blood from the body and passing it through a dialyzer composed of numerous hollow fibers. The blood and an electrolyte solution (dialysis fluid) with a concentration similar to that in the body are exchanged inside and outside the hollow fibers through the principles of diffusion, ultrafiltration, adsorption, and convection, thereby removing metabolic waste and maintaining electrolyte and acid-base balance.

[0003] Patients typically undergo dialysis for several hours, with CRRT dialysis lasting up to 24 hours. Maintaining the continuity of treatment throughout the entire tubing system and ensuring optimal treatment effectiveness during uninterrupted dialysis is a significant challenge. Clinical statistics show that tubing blockage due to arteriovenous fossa clotting accounts for approximately 70% of adverse events related to tubing. When blood flows through the arterial and venous fossae, a large amount of blood accumulates. Prolonged treatment time and poor blood flow accelerate blood clotting in the arteriovenous fossae, leading to tubing blockage and ultimately rendering the entire dialysis tubing unusable. Once arteriovenous fossa clotting occurs, the entire dialysis tubing needs to be replaced, increasing costs, prolonging dialysis time, and increasing patient discomfort. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a device and system for reducing blood clotting in hemodialysis. The device and system for reducing blood clotting in hemodialysis can prevent the occurrence of blood clotting in the arteriovenous chamber during the dialysis process.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A device for reducing blood clotting during hemodialysis includes an arteriovenous chamber and a support. Each arteriovenous chamber comprises a chamber shell and a lid. The support includes a left support and a right support. The arteriovenous chamber is positioned between the left and right supports. The lid covers the open end of the chamber shell, sealing the interior. The lid has an inlet port communicating with the interior of the chamber shell. The bottom of the chamber shell has an outlet port. A conical filter is located near the bottom of the chamber shell, with the outlet port at the bottom of the filter. The lid is positioned above the support. A stirring mechanism to prevent blood clotting is also provided within the chamber shell.

[0007] The stirring mechanism includes an impeller assembly, a stirring shaft, and a stirring cage. The impeller assembly includes an impeller shaft and impeller blades. At least three impeller blades are arranged along the circumferential direction of the impeller shaft. All impeller blades are inclined in a clockwise or counterclockwise direction on the outer circumference of the impeller shaft. Between two adjacent impeller blades, the higher side of one impeller blade is above the lower side of the other adjacent impeller blade. The upper surface of the impeller blade is a magnetic layer, and the lower surface of the impeller blade is a non-magnetic layer. The outer edge of the non-magnetic layer is curved upward and wraps around the outer edge of the magnetic layer. The stirring shaft is vertically installed inside the kettle shell, with its top end fixedly connected to the bottom of the impeller shaft. Stirring rods I are evenly distributed on the outer circumference of the stirring shaft. The stirring cage includes a connecting plate and stirring claws. The connecting plate is fixedly connected to the bottom of the stirring shaft. Multiple stirring claws are evenly distributed along the circumferential direction of the connecting plate. One end of each stirring claw is fixedly connected to the connecting plate, and the other end of each stirring claw extends obliquely outward from the conical filter screen and into the bottom of the kettle shell. Multiple stirring rods II are evenly distributed on the outer side of each stirring claw.

[0008] The top of the impeller shaft is rotatably engaged with the bottom of the kettle lid, and the liquid inlet is located directly above the corresponding impeller blade; the bottom of the stirring claw is rotatably engaged with the bottom of the kettle shell.

[0009] Both the left and right supports are equipped with electromagnets that can be rotated via a rotating mechanism. Each support has a storage cavity for the rotating mechanism and the electromagnet. When the electromagnet rotates downwards via the rotating mechanism, the rotating mechanism and the electromagnet fold into the corresponding storage cavity. When the electromagnet rotates upwards via the rotating mechanism and presses against the outer wall of the arteriovenous inlet, with all impeller blades arranged clockwise, the electromagnet on the left support is located on the left rear side of the arteriovenous inlet, and the electromagnet on the right support is located on the right front side. When all impeller blades are arranged counterclockwise, the electromagnet on the left support is located on the left front side of the arteriovenous inlet, and the electromagnet on the right support is located on the right rear side. The electromagnets on the left and right supports correspond to the magnetic layers of the impeller blades on the corresponding sides, and the polarity of the side of the electromagnet closest to the arteriovenous inlet is the same as the upper surface of the magnetic layer of the corresponding impeller blade.

[0010] In a preferred embodiment of the present invention, the rotating mechanism includes a rotating arm, a pin, and a torsion spring; the pin is installed in the receiving cavity along the front-to-back direction and is close to the arteriovenous urinal; one end of the rotating arm is sleeved on the pin and rotates with it; the torsion spring is sleeved outside the pin, one end of the torsion spring is fixedly connected to the inner wall of the receiving cavity, and the other end of the torsion spring is fixedly connected to the rotating arm; a sliding hole composed of segment I, segment II, and segment III is provided along the left-to-right direction on the other end of the rotating arm, the inner diameters of segment I and segment III are larger than the inner diameter of segment II, and segment III is close to the arteriovenous urinal; a fixed sliding rod, a sliding sleeve, a preload spring I, and an arc-shaped pressure plate are installed in the sliding hole; One end of the fixed sliding rod is fixed to the inner end wall of the hole section I. One end of the sliding sleeve is fitted onto the fixed sliding rod and slides with it. An annular boss is provided on the outer circle of the sliding sleeve along the circumferential direction. The annular boss is located inside the hole section I. The other end of the sliding sleeve passes through the hole section II. The preload spring I is fitted outside the sliding sleeve. One end of the preload spring I presses against the inner wall of the hole section I, and the other end of the preload spring I presses against the annular boss. The arc-shaped pressure plate is set inside the hole section III and slides with the inner wall of the hole section III. The arc-shaped pressure plate is fixed to the other end of the sliding sleeve. The concave arc surface of the arc-shaped pressure plate faces the arteriovenous urinal. The electromagnet is fixedly set on the arc-shaped pressure plate and is close to the side of the arteriovenous urinal.

[0011] In a preferred embodiment of the present invention, a hook I is provided at the top of the rotating arm on the side away from the arteriovenous inlet; a locking mechanism for locking the hook I is provided on the side of the left and right supports away from the arteriovenous inlet and below the receiving cavity, the locking mechanism including a drive rod, a hook II and a preload spring II; a groove communicating with the corresponding receiving cavity is provided on the side of the left and right supports away from the arteriovenous inlet and below the receiving cavity; and a locking mechanism is provided on the side of the left and right supports away from the arteriovenous inlet and below the groove. The locking hole has a limiting strip hole at its top that communicates with the groove; the drive rod is inserted into the locking hole, the hook II passes through the limiting strip hole, the top of the hook II is located in the groove, the bottom of the hook II is fixed to the drive rod, the preload spring II is placed in the locking hole, one end of the preload spring II presses against the inner end of the locking hole, and the other end of the preload spring II presses against the insertion end of the drive rod; after the rotating mechanism and the electromagnet are folded into the corresponding storage cavity, the top of the hook II is locked in the groove of the hook I.

[0012] In a preferred embodiment of the present invention, an annular groove I is provided at the bottom of the kettle lid, and at least three grooves I are evenly distributed in the circumferential direction on the top surface of the impeller shaft. A ball bearing I is placed in each groove I, and the top of the ball bearing I is located in the annular groove I and slides in engagement with the annular groove I. The top of the impeller shaft is rotatably engaged with the bottom of the kettle lid through the ball bearing I. An annular groove II is provided in the bottom of the kettle shell and outside the conical filter screen in the circumferential direction. A groove II is provided at the bottom of each stirring claw, and a ball bearing II is provided in each groove II. The bottom of the ball bearing II is located in the annular groove II and slides in engagement with the annular groove II. The bottom of the stirring claw is rotatably engaged with the bottom of the kettle shell through the ball bearing II.

[0013] As a preferred embodiment of the present invention, the impeller assembly is disposed at the top near the inside of the kettle shell and at a distance of ≤1cm from the bottom of the kettle lid.

[0014] As a preferred embodiment of the present invention, a stirring rod III is provided on the side of the stirring claw near the conical filter screen, and a soft scraper is provided at the end of the stirring rod III near the conical filter screen, with the outer end of the soft scraper contacting the outer wall of the conical filter screen.

[0015] As a preferred embodiment of the present invention, the top of the lid is provided with two pipes, both of which are offset from the center of the top of the lid; one of them is a liquid inlet, and the other is an exhaust pipe or a medicine pushing pipe. The liquid inlet is connected to the inside of the lid body through a liquid inlet hole.

[0016] In a preferred embodiment of the present invention, the central axes of the impeller shaft, the stirring shaft, and the stirring cage are arranged coaxially with the kettle shell.

[0017] In a preferred embodiment of the present invention, the liquid inlet is vertically disposed on the top of the lid body, the height of the liquid inlet is greater than 5 cm, a supporting hose is disposed on the outer wall of the top of the liquid inlet, and the bottom end of the liquid inlet is connected to the top of the liquid inlet hole; multiple strip holes are disposed along the length direction on all four sides of the outer wall of the supporting hose, each strip hole being perpendicular to the axis of the supporting hose; the strip holes on the four sides of the supporting hose are staggered relative to each other in the axial direction of the supporting hose.

[0018] A system for reducing blood clotting in hemodialysis tubing includes an arterial tubing I, an arterial chamber, an arterial tubing II, a venous tubing I, a venous chamber, a venous tubing II, and the aforementioned device for reducing blood clotting in hemodialysis tubing. Both the arterial chamber and the venous chamber adopt the aforementioned arteriovenous chamber structure. The arterial tubing I is connected to the inlet port of the arterial chamber, and a supporting flexible tube of the arterial chamber is fitted onto the arterial tubing I. The arterial tubing II is connected to the outlet port of the arterial chamber. The venous tubing I is connected to the inlet port of the venous chamber, and a supporting flexible tube of the venous chamber is fitted onto the venous tubing I. The venous tubing II is connected to the outlet port of the venous chamber.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention features an impeller assembly located near the top of the vessel shell, between the liquid surface and the lid. Two electromagnets are positioned on either side of the vessel, one slightly forward and one slightly backward. The side of the electromagnet closest to the vessel shell shares the same polarity as the upper surface of the magnetic layer of the corresponding impeller blade. The flow rate of blood entering the vessel shell, combined with the impact force of free fall, initiates the rotation of the impeller blade. When energized, the electromagnet exhibits the same polarity as the upper surface of its magnetic layer. Utilizing the principle of like poles repulsion, the repulsive force generated by the electromagnet accelerates the rotation of the corresponding impeller blade, thereby driving the impeller shaft, the lower stirring shaft, and the stirring cage to rotate. This agitates the blood within the vessel shell, preventing blood clotting and blockage of the vessels within the vessel shell.

[0021] 2. This device, which reduces blood clotting during hemodialysis, is equipped with a stirring mechanism and an electromagnet driving mechanism, which completely prevents blood clotting in the arteriovenous chamber. This saves the cost of replacing the dialysis tubing due to blood clotting in the venous chamber, while also ensuring the continuity and effectiveness of dialysis treatment. This circulation state makes the blood less likely to coagulate, effectively achieving an anticoagulant effect and greatly reducing the suffering of dialysis patients. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a device that reduces blood clotting and tubing blockage during hemodialysis.

[0023] Figure 2 This is a schematic diagram of the arteriovenous urinary tract;

[0024] Figure 3 This is a schematic diagram of the lid's structure;

[0025] Figure 4 This is a schematic diagram of the bottom structure of the kettle shell;

[0026] Figure 5 This is a schematic diagram of the stirring mechanism;

[0027] Figure 6 This is a schematic diagram of the impeller assembly;

[0028] Figure 7 This is a schematic diagram of the cross-section of the impeller blade;

[0029] Figure 8 This is a schematic diagram of the mixing cage.

[0030] Figure 9 This is a three-dimensional structural diagram of the left support;

[0031] Figure 10 This is a schematic diagram of the electromagnet rotating upwards via a rotating mechanism;

[0032] Figure 11 This is a schematic diagram of the structure after the rotating mechanism and electromagnet are housed in the storage cavity;

[0033] Figure 12 This is a schematic diagram showing the distribution of electromagnets when all impeller blades are arranged in a clockwise direction;

[0034] Figure 13 This is a schematic diagram showing the distribution of electromagnets when all impeller blades are arranged in a counterclockwise direction;

[0035] Figure 14 This is a schematic diagram of the structure of the rotating arm, pin, and torsion spring.

[0036] Figure 15 This is a structural diagram of the pin;

[0037] Figure 16 This is a schematic diagram of a structure with sliding holes on the rotating arm;

[0038] Figure 17 yes Figure 10 Enlarged structural diagram at point A;

[0039] Figure 18 This is a schematic diagram of the sliding sleeve.

[0040] Figure 19 This is an enlarged structural diagram of point B in section 10;

[0041] Figure 20 yes Figure 11 Enlarged structural diagram at point C;

[0042] Figure 21 This is a schematic diagram of the structure with a soft scraper at the outer end of the stirring rod III;

[0043] Figure 22 This is a schematic diagram of the structure supporting the hose;

[0044] Figure 23This is a schematic diagram of the structure of a hemodialysis tubing.

[0045] In the diagram: 1—Arteriovenous reservoir; 11—Arterial reservoir; 12—Venous reservoir; 2—Reservoir shell; 21—Discharge port; 22—Annular groove II; 3—Reservoir lid; 31—Inlet port; 32—Annular groove I; 4—Support; 41—Left support; 42—Right support; 43—Rotating mechanism; 431—Rotating arm; 432—Pin; 433—Torsion spring; 434—Sliding hole; 4341—Hole section I; 4342—Hole section II; 4343—Hole section III; 435—Fixed sliding rod; 436—Sliding sleeve; 437—Preload spring I; 438—Arc-shaped pressure plate; 439—Annular boss; 440—Hook I; 441—Lithium battery; 442—Switch; 44—Electromagnet; 45—Storage cavity; 46—Locking mechanism; 461—Drive rod; 462—Hook II; 463—Preload spring II; 47—Groove; 48—Locking hole; 49—Limiting strip hole; 5—Stirring mechanism; 51—Impeller assembly; 511—Impeller shaft; 5111—Groove I; 5112—Ball bearing I; 512—Impeller blade; 5121—Magnetic layer; 5122—Non-magnetic layer; 52—Stirring shaft; 521—Stirring rod I; 53—Stirring cage; 531—Connecting plate; 532—Stirring claw; 5321—Groove II; 5322—Ball bearing II; 533—Stirring rod II; 534—Stirring rod III; 535—Soft scraper; 6—Liquid inlet; 7—Exhaust pipe; 8—Drug pusher; 9—Support hose; 91—Strip hole; 10—Arterial line I; 13—Arterial line II; 14—Venous line I; 15—Venous line II; 16—Dialyzer; 17—Conical filter. Detailed Implementation

[0046] The present invention will now be described in detail with reference to the embodiments and accompanying drawings.

[0047] like Figure 1 As shown, a device for reducing blood clotting blockage in hemodialysis tubing includes an arteriovenous reservoir 1 and a stent 4. The arteriovenous reservoir 1 includes a reservoir shell 2 and a reservoir lid 3. The stent 4 includes a left stent 41 and a right stent 42. The arteriovenous reservoir 1 is positioned between the left stent 41 and the right stent 42. The reservoir lid 3 covers the open end of the reservoir shell 2, sealing the interior of the reservoir shell 2. Figure 2 As shown. The lid 3 is provided with a liquid inlet 31 that communicates with the inside of the kettle shell 2, as shown. Figure 3 As shown. The bottom of the vessel shell 2 is provided with a liquid outlet 21, as... Figure 4As shown. A conical filter screen 17 is installed near the bottom inside the kettle shell 2. The liquid outlet 21 is located at the middle of the bottom of the conical filter screen 17. The kettle lid 3 is located above the support 4, and the conical filter screen 17 is located below the support 4, as shown. Figure 1 As shown, a stirring mechanism 5 is provided inside the kettle shell 2 to prevent blood clotting.

[0048] The stirring mechanism 5 includes an impeller assembly 51, a stirring shaft 52, and a stirring cage 53, such as... Figure 5 As shown. The impeller assembly 51 includes an impeller shaft 511 and impeller blades 512, as shown. Figure 6 As shown, at least three impeller blades 512 are arranged along the circumferential direction of the impeller shaft 511. In this embodiment, three impeller blades are evenly distributed along the circumferential direction of the impeller shaft 511. All impeller blades 512 are inclined in a clockwise or counterclockwise direction on the outer circle of the impeller shaft 511. Between two adjacent impeller blades 512, the higher side of one impeller blade 512 is above the lower side of the other adjacent impeller blade 512. The upper surface of the impeller blade 512 is a magnetic layer 5121, and the lower surface of the impeller blade 512 is a non-magnetic layer 5122. The outer edge of the non-magnetic layer 5122 is bent upward and wrapped around the outer edge of the magnetic layer 5121, as shown. Figure 7 As shown. The stirring shaft 52 is vertically installed inside the kettle shell 2. The top end of the stirring shaft 52 is fixedly connected to the bottom of the impeller shaft 511. Stirring rods I 521 are evenly distributed on the outer circumference of the stirring shaft 52. The stirring cage 53 includes a connecting plate 531 and stirring claws 532, as shown. Figure 8 As shown, the connecting plate 531 is fixedly connected to the bottom of the stirring shaft 52. Multiple stirring claws 532 are evenly distributed along the circumferential direction of the outer edge of the connecting plate 531. In this embodiment, four stirring claws 532 are evenly distributed along the circumferential direction of the outer edge of the connecting plate 531. One end of each stirring claw 532 is fixedly connected to the connecting plate 531, and the other end of each stirring claw 532 extends obliquely outward from the conical filter screen 17 and into the bottom of the kettle shell 2. Multiple stirring rods II 533 are evenly distributed on the outer side of each stirring claw 532. The top of the impeller shaft 511 is rotatably engaged with the bottom of the kettle lid 3, and the liquid inlet 31 is located directly above the corresponding impeller blade 512. The bottom of the stirring claws 532 is rotatably engaged with the bottom of the kettle shell 2.

[0049] Both the left support 41 and the right support 42 are equipped with electromagnets 44 that can rotate via a rotating mechanism 43. Both the left support 41 and the right support 42 are also equipped with storage cavities 45 for accommodating the rotating mechanism 43 and the electromagnets 44. Figure 1 , Figure 9 , Figure 10 and Figure 11 As shown. After the electromagnet 44 rotates downward via the rotating mechanism 43, the rotating mechanism 43 and the electromagnet 44 are folded into the corresponding storage cavity 45, as shown. Figure 11As shown. After the electromagnet 44 rotates upward through the rotating mechanism 43 and presses against the outer wall of the arteriovenous inlet 1, when all the impeller blades 512 are arranged in a clockwise direction, the electromagnet 44 on the left support 41 is located on the left rear side of the arteriovenous inlet 1, and the electromagnet 44 on the right support 42 is located on the right front side of the arteriovenous inlet 1, as shown. Figure 12 As shown. When all impeller blades 512 are arranged counterclockwise, the electromagnet 44 on the left support 41 is located on the left front side of the arteriovenous chamber 1, and the electromagnet 44 on the right support 42 is located on the right rear side of the arteriovenous chamber 1, as shown. Figure 13 As shown. The electromagnets 44 on the left support 41 and the right support 42 are respectively corresponding to the magnetic layer 5121 of the impeller blade 512 on the corresponding side, and the side of the electromagnet 44 near the arteriovenous chamber 1 has the same polarity as the upper surface of the magnetic layer 5121 of the corresponding impeller blade 512.

[0050] The blood flow rate entering the vessel shell 2 and the impact force of free fall together impact the inclined impeller 512, thereby starting the impeller 512 and impeller shaft 511 to rotate. The polarity generated by the energized electromagnet 44 is the same as the polarity of the upper surface of the magnetic layer 5121. Utilizing the principle of like pole repulsion, the repulsive force generated by the electromagnet 44 drives the impeller 512 corresponding to the electromagnet 44 to rotate faster. At the same time, the rotation of the impeller shaft 511 drives the stirring shaft 52 and stirring cage 53 below it to rotate together, thereby agitating the blood in the vessel shell 2 and preventing the phenomenon of blood clotting and blockage of the pipeline in the arteriovenous vessel 1.

[0051] The rotating mechanism 43 includes a rotating arm 431, a pin 432, and a torsion spring 433, such as Figure 14 As shown. In this embodiment, an annular groove is provided in the middle of the pin 432, as... Figure 15 As shown, the pin 432 is installed in the receiving cavity 45 along the front-to-back direction and is located near the arteriovenous vessel 1. Both ends of the pin 432 are inserted into the inner wall of the receiving cavity 45. One end of the rotating arm 431 is fitted into the annular groove of the pin 432 and rotates in cooperation with the pin 432. The torsion spring 433 is fitted outside the pin 432. One end of the torsion spring 433 is fixedly connected to the corresponding inner wall of the receiving cavity 45, and the other end of the torsion spring 433 is fixedly connected to the rotating arm 431. In this embodiment, there are two torsion springs 433, both located on both sides of the rotating arm 431. The other end of the rotating arm 431 is provided with a sliding hole 434 along the left-to-right direction, consisting of hole segment I 4341, hole segment II 4342, and hole segment III 4343, as shown. Figure 16 As shown, the inner diameters of orifice segments I 4341 and III 4343 are larger than the inner diameter of orifice segment II 4342, with orifice segment III 4343 being closer to the arteriovenous chamber 1. A fixed sliding rod 435, a sliding sleeve 436, a preload spring I 437, and an arc-shaped pressure plate 438 are installed inside the sliding hole 434. Figure 17As shown; one end of the fixed slide rod 435 is fixed to the inner end wall of the hole section I 4341, one end of the sliding sleeve 436 is sleeved on the fixed slide rod 435 and slides in cooperation with the fixed slide rod 435, and an annular boss 439 is provided on the outer circle of the sliding sleeve 436 along the circumferential direction, as shown. Figure 18 As shown, the annular boss 439 is located inside the bore section I 4341, the other end of the sliding sleeve 436 passes through the bore section II 4342, the preload spring I 437 is sleeved outside the sliding sleeve 436, one end of the preload spring I 437 presses against the inner wall of the bore section I 4341, and the other end of the preload spring I 437 presses against the annular boss 439. The arc-shaped pressure plate 438 is set inside the bore section III 4343 and slides in cooperation with the inner wall of the bore section III 4343. The arc-shaped pressure plate 438 is fixed on the other end of the sliding sleeve 436, and the concave arc surface of the arc-shaped pressure plate 438 faces the arteriovenous inlet 1. The electromagnet 44 is fixedly set on the arc-shaped pressure plate 438 and close to the side of the arteriovenous inlet 1.

[0052] A hook I 440 is provided on the top of the side of the rotating arm 431 away from the arteriovenous chamber 1. In this embodiment, the hook I 440 is shaped like a "7". Figure 16 and Figure 17 As shown. A locking mechanism 46 for locking the hook I 440 is provided on the side of the left stent 41 and right stent 42 away from the arteriovenous chamber 1 and below the receiving cavity 45. The locking mechanism 46 includes a drive rod 461, a hook II 462, and a preload spring II 463, as shown. Figure 19 As shown, both the left support 41 and the right support 42 have grooves 47 communicating with the corresponding receiving cavity 45 on the side away from the arteriovenous chamber 1 and below the receiving cavity 45. Both the left support 41 and the right support 42 have locking holes 48 on the side away from the arteriovenous chamber 1 and below the grooves 47. The top of the locking hole 48 has a limiting strip hole 49 communicating with the groove 47. The drive rod 461 is inserted into the locking hole 48, and the hook II 462 passes through the limiting strip hole 49. The top of the hook II 462 is located in the groove 47, and the bottom of the hook II 462 is fixed to the drive rod 461. The shape of the hook II 462 is similar to the number "7". Figure 19 and Figure 20 As shown, the preload spring II 463 is placed inside the locking hole 48, with one end of the preload spring II 463 pressing against the inner end of the locking hole 48, and the other end pressing against the insertion end of the drive rod 461. After the rotating mechanism 43 and the electromagnet 44 are folded into the corresponding storage cavity 45, the top of the hook II 462 is engaged in the groove of the hook I 440, as shown. Figure 20 As shown.

[0053] In this embodiment, a lithium battery 441 is installed in the end of the rotating arm 431 away from the pin 432, and a switch 442 is installed on the surface of the end of the rotating arm 431 away from the pin 432. The lithium battery 441 is connected to the corresponding electromagnet 44 through a wire, and the switch 442 is connected in series between the lithium battery 441 and the electromagnet 44. When the switch 442 is turned on, the lithium battery 441 supplies power to the electromagnet 44, and when the switch 442 is turned off, the electromagnet 44 is de-energized.

[0054] After the arteriovenous inlet 1 is secured between the left support 41 and the right support 42, the drive rod 461 is pressed inward. The drive rod 461 moves inward within the locking hole 48, compressing the preload spring II 463. Simultaneously, this compresses the hook II 462 on the spring, causing it to move inward within the limiting strip hole 49. The top of the hook II 462 moves inward within the groove 47, disengaging from the groove of the hook I 440. Under the restoring force of the torsion spring 433, the rotating arm 431 rotates upward around the pin 432. As the rotating arm 431 gradually rotates to the vertical position, the arc-shaped pressure plate 438, along with the electromagnet 44 on it, presses against the corresponding side wall of the arteriovenous inlet 1. The side of the electromagnet 44 closest to the arteriovenous inlet 1 corresponds to the magnetic layer 5121 of the impeller blade 512 on the corresponding side and is slightly higher than the upper surface of the magnetic layer 5121 of the corresponding impeller blade 512. During the process of pressing the arteriovenous dialysis vessel 1, the arc-shaped pressure plate 438, along with the electromagnet 44 on it, moves inward along the orifice section III 4343. The arc-shaped pressure plate 438 drives the sliding sleeve 436 to move inward on the fixed sliding rod 435. The annular boss 439 on the sliding sleeve 436 also moves inward synchronously. The pre-compression spring I 437 is compressed. The pressure of the arc-shaped pressure plate 438 and the electromagnet 44 on the arteriovenous dialysis vessel 1 can be controlled by the pre-compression spring I 437. After dialysis begins, the switch 442 is turned on. The polarity generated by the electromagnet 44 is the same as the polarity of the upper surface of the magnetic layer 5121. Under the repulsive force generated by the electromagnet 44, the impeller blade 512 is accelerated to rotate. The impeller shaft 511 rotates at the same time, driving the stirring shaft 52 and the stirring cage 53 below it to rotate together, thereby preventing the phenomenon of blood clotting and blockage of the tubing in the arteriovenous dialysis vessel 1. After dialysis, turn off switch 442 and rotate arm 431 downwards. The arc-shaped pressure plate 438 on the rotating arm 431 and the electromagnet 44 on it leave the arteriovenous chamber 1. When the rotating arm 431 rotates outwards to the horizontal, the bottom of hook I 440 presses hook II 463. The driven hook II 463 moves inwards in the limiting strip hole 49. The drive rod 461 moves inwards in the locking hole 48. The pre-compression spring II 463 is compressed. When the bottom of hook I 440 is below the top of hook II 463, under the restoring force of the pre-compression spring II 463, the drive rod 461 drives hook II 463 to move outwards together. The top of hook II 462 is locked in the groove of hook I 440. The rotating mechanism 43 and electromagnet 44 are folded into the corresponding receiving cavity 45. At this time, the arteriovenous chamber 1 can be removed from between the left support 41 and the right support 42.

[0055] In this embodiment, an annular groove I32 is provided at the bottom of the lid body 3, such as... Figure 3As shown, at least three grooves I5111 are evenly distributed in the circumferential direction on the top surface of the impeller shaft 511. In this embodiment, four grooves I5111 are evenly distributed in the circumferential direction on the top surface of the impeller shaft 511. A ball I5112 is placed in each groove I5111. The top of the ball I5112 is located in the annular groove I32 and slides in cooperation with the annular groove I32. The top of the impeller shaft 511 rotates in cooperation with the bottom of the lid body 3 through the ball I5112. Figure 2 As shown. In this embodiment, an annular groove II 22 is provided at the bottom of the kettle shell 2, located along the circumferential direction of the outer edge of the conical filter screen 17, as shown. Figure 4 As shown, each stirring claw 532 has a groove II 5321 at its bottom, as... Figure 5 and Figure 8 As shown, each groove II 5321 is provided with a ball II 5322. The bottom of the ball II 5322 is located in the annular groove II 22 and slides in engagement with the annular groove II 22. The bottom of the stirring claw 532 rotates in engagement with the bottom of the pot shell 2 through the ball II 5322. Figure 2 As shown.

[0056] The impeller assembly 51 is positioned near the top of the vessel housing 2, ≤1cm from the bottom of the lid 3. The liquid level inside the vessel housing 2 is typically about 1cm from the lid 3. Therefore, positioning the impeller assembly 51 within 1cm of the bottom of the lid 3 avoids interference from the blood inside the vessel housing 2 with the impeller blades 512. It also allows the blood with a certain flow rate to enter the vessel housing 2 and, together with the impact force of free fall, drive the impeller blades 512 to rotate. After the impeller blades 512 start rotating, the electromagnet 44 accelerates their rotation, ensuring that the impeller assembly 51 can rotate once it is subjected to force. A stirring rod Ⅲ 534 is positioned on the side of the stirring claw 532 near the conical filter screen 17. A soft scraper 535 is positioned at the end of the stirring rod Ⅲ 534 near the conical filter screen 17. Figure 21 As shown, the outer end of the soft scraper 535 contacts the outer wall of the conical filter screen 17, as... Figure 1 and Figure 2As shown. The central axes of the impeller shaft 511, stirring shaft 52, and stirring cage 53 are coaxial with the vessel shell 2. When the impeller assembly 51 drives the stirring shaft 52 and stirring cage 53 to rotate, stirring rod I 521, stirring rod II 533, and stirring rod III 534 agitate the blood in the vessel shell 2 to prevent the blood in the vessel shell 2 from coagulating. When stirring rod III 534 rotates, it drives the soft scraper 535 on it to move together. The outer end of the soft scraper 535 slides over the outer wall of the conical filter screen 17 and scrapes off the blood attached to the outer wall of the conical filter screen 17. This not only prevents blood from adhering to the mesh of the conical filter screen 17 and causing coagulation, but also helps to maintain the filtration effect of the conical filter screen 17. It also helps the blood in the vessel shell 2 to enter the liquid outlet 21 at the bottom of the vessel shell 2 through the conical filter screen 17.

[0057] The lid body 3 has two pipes on its top, both offset from the center of the top. This facilitates the installation of the impeller shaft 511 at the bottom center of the lid body 3, ensuring smooth rotation of the impeller assembly 51 without affecting the installation and use of the two pipes. One pipe is a liquid inlet 6, and the other is an exhaust pipe 7 or a drug pushing pipe 8. The liquid inlet 6 is connected to the inside of the lid body 2 through the liquid inlet hole 31. The liquid inlet 6 is vertically positioned on the top of the lid body 3, with a height greater than 5 cm. Blood with a certain flow rate enters the liquid inlet 6 vertically. The downward flow velocity, combined with the impact force of free fall greater than 5 cm, drives the impeller blade 512 to rotate, providing sufficient driving force for the impeller assembly 51 to start the impeller assembly 51 and the stirring shaft 52 and stirring cage 53 below it to rotate together. A support hose 9 is installed on the outer wall of the top of the liquid inlet 6. Figure 1 and Figure 2 As shown, the bottom end of the liquid inlet 6 is connected to the top end of the liquid inlet hole 31; multiple strip-shaped holes 91 are provided along the length direction on all four sides of the outer wall of the support hose 9, and each strip-shaped hole 91 is perpendicular to the axis of the support hose 9; the strip-shaped holes 91 on the four sides of the support hose 9 are staggered in the axial direction of the support hose 9, as shown in the figure. Figure 22 As shown. During operation, the arteriovenous chamber 1 is vertically clamped onto the dialysis machine. The support hose 9 is sleeved over the tubing connecting the arterial line to the inlet port 6 or the venous line to the inlet port 6. The section of the arterial and venous lines near the corresponding inlet port 6 is prone to bending. After the support hose 9 is sleeved, if excessive bending occurs, the inner strip hole 91 of the support hose 9 at the bending part narrows and contacts to form a support, preventing the deformed support hose 9 from bending further. This effectively avoids excessive bending and kinking of the arterial and venous lines inside, effectively ensuring the blood flow rate in the arterial and venous lines, and thus ensuring that the blood entering the chamber shell 2 has sufficient driving force to rotate the impeller blade 512.

[0058] The present invention also provides a system for reducing coagulation blockage of tubing during hemodialysis, comprising arterial tubing I 10, arterial chamber 11, arterial tubing II 13, venous tubing I 14, venous chamber 12, venous tubing II 15, and the aforementioned device for reducing coagulation blockage of tubing during hemodialysis, such as... Figure 23 As shown, both the arterial chamber 11 and the venous chamber 12 adopt the structure of the arteriovenous chamber 1 described above. Arterial tubing I 10 is connected to the inlet port 6 of the arterial chamber 11, and the supporting tubing 9 of the arterial chamber 11 is fitted onto the arterial tubing I 10. One end of arterial tubing II 13 is connected to the outlet port 21 of the arterial chamber 11, and the other end of arterial tubing II 13 is connected to the arterial end connector on the dialyzer 16 during dialysis. One end of venous tubing I 14 is connected to the inlet port 6 of the venous chamber 12, and the supporting tubing 9 of the venous chamber 12 is fitted onto the venous tubing I 14. The other end of venous tubing I 14 is connected to the venous end connector on the dialyzer 16 during dialysis. Venous tubing II 15 is connected to the outlet port 21 of the venous chamber 12. Blood from the human arteries enters the inlet port 6 of the arterial reservoir 11 through the external arterial tubing I10. A supporting tubing 9 is fitted near the inlet port 6 to prevent the end of the arterial tubing I10 from being completely bent. This ensures that the blood in the arterial tubing I10, after passing through the arterial pump, enters the inlet port 6 at a certain and stable flow rate, plus a flow rate greater than 5... The impact force of the free fall within the inlet port 6 (6 cm in length) drives the impeller blade 512 to rotate. Under the synergistic action of the electromagnet 44, the impeller shaft 511 drives the stirring shaft 52 and the stirring cage 53 to rotate synchronously, stirring the blood in the vessel shell 2 and effectively preventing the blood in the vessel shell 2 from coagulating. The blood in the arterial vessel 11 is input into the dialyzer 16 through the arterial tubing II 13. The electrolyte solution (dialysis fluid) with a similar concentration to that in the dialyzer 16 undergoes substance exchange through diffusion, ultrafiltration, adsorption, and convection. Then, it flows into the venous vessel 12 through the venous tubing I 14, where it is also stirred and filtered, and then flows back into the human vein through the venous tubing II 15.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for reducing coagulation blockage in hemodialysis tubing, comprising an arteriovenous chamber (1) and a support (4), wherein each arteriovenous chamber (1) comprises a chamber shell (2) and a chamber lid (3), and the support (4) comprises a left support (41) and a right support (42), wherein the arteriovenous chamber (1) is fitted between the left support (41) and the right support (42), and the chamber lid (3) covers the open end of the top of the chamber shell (2) and seals the interior of the chamber shell (2), wherein the chamber lid (3) is provided with an inlet hole (31) communicating with the interior of the chamber shell (2), and an outlet hole (21) is provided at the bottom of the chamber shell (2); wherein a conical filter screen (17) is provided near the bottom of the chamber shell (2), and the outlet hole (21) is located at the bottom of the conical filter screen (17), and the chamber lid (3) is located above the support (4); characterized in that: The kettle shell (2) is equipped with a stirring mechanism (5) to prevent blood clotting. The stirring mechanism (5) includes an impeller assembly (51), a stirring shaft (52), and a stirring cage (53); the impeller assembly (51) includes an impeller shaft (511) and impeller blades (512), with at least three impeller blades (512) arranged along the circumferential direction of the outer edge of the impeller shaft (511). All impeller blades (512) are inclined in a clockwise or counterclockwise direction on the outer circle of the impeller shaft (511), and between two adjacent impeller blades (512), the higher side of one impeller blade (512) is located above the lower side of the other adjacent impeller blade (512); the upper surface of the impeller blade (512) is a magnetic layer (5121), and the lower surface of the impeller blade (512) is a non-magnetic layer (5122). The outer edge of the non-magnetic layer (5122) is bent upward and wrapped around the magnetic layer (5121). On the outer edge of the container; the stirring shaft (52) is vertically set inside the container shell (2), the top of the stirring shaft (52) is fixedly connected to the bottom of the impeller shaft (511), and stirring rods I (521) are evenly distributed on the outer circumference of the stirring shaft (52); the stirring cage (53) includes a connecting plate (531) and stirring claws (532), the connecting plate (531) is fixedly connected to the bottom of the stirring shaft (52), and multiple stirring claws (532) are evenly distributed on the outer circumference of the connecting plate (531), one end of the stirring claw (532) is fixedly connected to the connecting plate (531), and the other end of the stirring claw (532) is inclined to the outside of the conical filter screen (17) and extends into the bottom of the container shell (2); multiple stirring rods II (533) are evenly distributed on the outer side of the stirring claw (532). The top of the impeller shaft (511) is rotatably engaged with the bottom of the lid body (3), and the liquid inlet (31) is located directly above the corresponding impeller blade (512); the bottom of the stirring claw (532) is rotatably engaged with the bottom inside the kettle shell (2); Both the left support (41) and the right support (42) are equipped with electromagnets (44) that can be rotated by a rotating mechanism (43). Both the left support (41) and the right support (42) are equipped with storage cavities (45) for accommodating the rotating mechanism (43) and the electromagnets (44). After the electromagnets (44) are rotated downward by the rotating mechanism (43), the rotating mechanism (43) and the electromagnets (44) are folded into the storage cavities (45) on the corresponding sides. After the electromagnets (44) are rotated upward by the rotating mechanism (43) and pressed against the outer wall of the arteriovenous chamber (1), when all the impeller blades (512) are arranged in a clockwise direction, the electromagnets (44) on the left support (41) are located in the arteriovenous chamber. On the left rear side of the pot (1), the electromagnet (44) on the right support (42) is located on the right front side of the arteriovenous pot (1). When all the impeller blades (512) are arranged in a counterclockwise direction, the electromagnet (44) on the left support (41) is located on the left front side of the arteriovenous pot (1), and the electromagnet (44) on the right support (42) is located on the right rear side of the arteriovenous pot (1). The electromagnets (44) on the left support (41) and the right support (42) are all corresponding to the magnetic layer (5121) of the impeller blade (512) on the corresponding side. The side of the electromagnet (44) that is close to the arteriovenous pot (1) has the same polarity as the upper surface of the magnetic layer (5121) of the corresponding impeller blade (512).

2. The device for reducing blood clotting in hemodialysis tubing according to claim 1, characterized in that: The rotating mechanism (43) includes a rotating arm (431), a pin (432), and a torsion spring (433). The pin (432) is installed in the receiving cavity (45) along the front-back direction and is close to the side of the arteriovenous pot (1). One end of the rotating arm (431) is sleeved on the pin (432) and rotates in cooperation with the pin (432). The torsion spring (433) is sleeved on the outside of the pin (432). One end of the torsion spring (433) is fixedly connected to the inner wall of the receiving cavity (45), and the other end of the torsion spring (433) is fixedly connected to the rotating arm (431). The other end of the rotating arm (431) is provided with a sliding hole (434) consisting of hole segment I (4341), hole segment II (4342), and hole segment III (4343) along the left-right direction. The inner diameter of hole segment I (4341) and hole segment III (4343) is larger than the inner diameter of hole segment II (4342). Hole segment III (4343) is close to the arteriovenous urinal (1). A fixed sliding rod (435), a sliding sleeve (436), a preload spring I (437), and an arc-shaped pressure plate (438) are installed in the sliding hole (434). One end of the fixed sliding rod (435) is fixed to the inner end wall of hole segment I (4341). One end of the sliding sleeve (436) is sleeved on the fixed sliding rod (435) and slides in cooperation with the fixed sliding rod (435). An annular protrusion is provided on the outer circle of the sliding sleeve (436) along the circumferential direction. The platform (439) is located inside the hole section I (4341). The other end of the sliding sleeve (436) passes through the hole section II (4342). The preload spring I (437) is sleeved outside the sliding sleeve (436). One end of the preload spring I (437) presses against the inner wall of the hole section I (4341), and the other end of the preload spring I (437) presses against the annular boss (439). The arc-shaped pressure plate (438) is set inside the hole section III (4343) and slides in cooperation with the inner wall of the hole section III (4343). The arc-shaped pressure plate (438) is fixed on the other end of the sliding sleeve (436). The concave arc surface of the arc-shaped pressure plate (438) faces the arteriovenous urinal (1). The electromagnet (44) is fixedly set on the arc-shaped pressure plate (438) and close to the side of the arteriovenous urinal (1).

3. The device for reducing blood clotting in hemodialysis tubing according to claim 2, characterized in that: A hook I (440) is provided on the top of the side of the rotating arm (431) away from the arteriovenous pot (1). The left support (41) and right support (42) are provided with a locking mechanism (46) for locking the hook I (440) on the side away from the arteriovenous inlet (1) and below the receiving cavity (45). The locking mechanism (46) includes a drive rod (461), a hook II (462) and a preload spring II (463). The left support (41) and right support (42) are each provided with a groove (47) communicating with the corresponding receiving cavity (45) on the side away from the arteriovenous inlet (1) and below the receiving cavity (45). The left support (41) and right support (42) are each provided with a locking hole (48) on the side away from the arteriovenous inlet (1) and below the groove (47). The top of the locking hole (48) is provided with a groove that connects with the groove (47). A connecting limiting strip hole (49); the drive rod (461) is inserted into the locking hole (48), the hook II (462) passes through the limiting strip hole (49), the top of the hook II (462) is located in the groove (47), the bottom of the hook II (462) is fixed on the drive rod (461), the preload spring II (463) is placed in the locking hole (48), one end of the preload spring II (463) is pressed on the inner end of the locking hole (48), and the other end of the preload spring II (463) is pressed on the insertion end of the drive rod (461); after the rotating mechanism (43) and the electromagnet (44) are folded into the corresponding storage cavity (45), the top of the hook II (462) is locked in the groove of the hook I (440).

4. The apparatus for reducing coagulation blockage in tubing during hemodialysis according to any one of claims 1 to 3, characterized in that: The bottom of the lid body (3) is provided with an annular groove I (32). At least three grooves I (5111) are evenly distributed in the circumferential direction on the top surface of the impeller shaft (511). A ball I (5112) is placed in each groove I (5111). The top of the ball I (5112) is located in the annular groove I (32) and slides in cooperation with the annular groove I (32). The top of the impeller shaft (511) rotates in cooperation with the bottom of the lid body (3) through the ball I (5112). An annular groove II (22) is provided at the bottom of the kettle shell (2) and along the circumferential direction outside the conical filter screen (17). A groove II (5321) is provided at the bottom of each stirring claw (532). A ball II (5322) is provided in each groove II (5321). The bottom of the ball II (5322) is located in the annular groove II (22) and slides in cooperation with the annular groove II (22). The bottom of the stirring claw (532) rotates in cooperation with the bottom of the kettle shell (2) through the ball II (5322).

5. The device for reducing blood clotting in hemodialysis tubing according to claim 4, characterized in that: The impeller assembly (51) is located at the top near the inside of the kettle shell (2) and ≤1cm away from the bottom of the kettle lid body (3).

6. The device for reducing blood clotting in hemodialysis tubing according to claim 5, characterized in that: The stirring claw (532) is provided with a stirring rod III (534) on the side near the conical filter screen (17). A soft scraper (535) is provided at one end of the stirring rod III (534) near the conical filter screen (17). The outer end of the soft scraper (535) is in contact with the outer wall of the conical filter screen (17). The top of the lid body (3) is provided with two pipes, both of which are offset from the top center of the lid body (3).

7. The device for reducing blood clotting in hemodialysis tubing according to claim 6, characterized in that: Of the two pipes, one is a liquid inlet (6) and the other is an exhaust pipe (7) or a medicine pusher (8). The liquid inlet (6) is connected to the inside of the pot shell (2) through the liquid inlet hole (31).

8. The device for reducing blood clotting in hemodialysis tubing according to claim 7, characterized in that: The central axes of the impeller shaft (511), the stirring shaft (52) and the stirring cage (53) are set coaxially with the kettle shell (2).

9. The device for reducing blood clotting in hemodialysis tubing according to claim 8, characterized in that: The liquid inlet (6) is vertically set on the top of the lid body (3). The height of the liquid inlet (6) is greater than 5 cm. A support hose (9) is set on the outer wall of the top of the liquid inlet (6). The bottom end of the liquid inlet (6) is connected to the top of the liquid inlet hole (31). Multiple strip holes (91) are set along the length direction on all four sides of the outer wall of the support hose (9). Each strip hole (91) is perpendicular to the axis of the support hose (9). The strip holes (91) on the front, back, left and right sides of the support hose (9) are staggered in the axial direction of the support hose (9).

10. A system for reducing coagulation blockage in hemodialysis tubing, comprising arterial tubing I (10), arterial chamber (11), arterial tubing II (13), venous tubing I (14), venous chamber (12), and venous tubing II (15); characterized in that: It also includes the device for reducing coagulation blockage of the tubing during hemodialysis as described in claim 9, wherein the arterial chamber (11) and the venous chamber (12) both adopt the structure of the arteriovenous chamber (1) as described in claim 9; the arterial tubing I (10) is connected to the inlet port (6) of the arterial chamber (11), the supporting hose (9) of the arterial chamber (11) is sleeved on the arterial tubing I (10), and the arterial tubing II (13) is connected to the outlet port (21) of the arterial chamber (11); the venous tubing I (14) is connected to the inlet port (6) of the venous chamber (12), the supporting hose (9) of the venous chamber (12) is sleeved on the venous tubing I (14), and the venous tubing II (15) is connected to the outlet port (21) of the venous chamber (12).

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