Portable hemodialysis instrument capable of preventing loop from being blocked

Abstract

The invention discloses a portable hemodialysis instrument capable of preventing a loop from being blocked, and relates to the technical field of hemodialysis instruments. The blood pumping device comprises a shell, a reciprocating driving mechanism is arranged in the shell, a piston film is fixedly installed in a loop cavity in the shell, the reciprocating driving mechanism drives the piston film to reciprocate for blood pumping operation, and a sealing cover is fixedly installed at the end of the shell. According to the device, blood enters extracorporeal circulation through the connecting end, the flow monitoring mechanism monitors the blood flow of the blood inlet end and the blood return end in real time, when it is detected that the flow of the blood inlet end is obviously lower than the flow of the blood return end, it is indicated that thrombus is possibly formed or blockage is likely to happen in a loop, and at the moment, the anti-coagulation and anti-blocking mechanism is immediately started; the blood inlet pipeline is accurately filled with anticoagulant, initial thrombus is actively dissolved, and blockage expansion is prevented, so that manual shutdown cleaning in the background technology is avoided, dialysis continuity and safety are guaranteed, and one-way flowing of blood is guaranteed through the one-way valves on the two connecting ends.

Description

Technical Field

[0001] This invention relates to the field of hemodialysis equipment technology, and more specifically to a portable hemodialysis equipment with an anti-clogging circuit. Background Technology

[0002] Hemodialysis is a technique that uses a semipermeable membrane to exchange substances between blood and dialysate, removing metabolic waste and excess water from the blood, thereby maintaining the patient's fluid and electrolyte balance.

[0003] Fibrin, clots, and impurities in the blood can easily adhere to the filter membrane or capillary wall, causing local blockage. Once a blockage occurs, manual shutdown for cleaning or replacement of the filter cartridge is required, which not only interrupts dialysis but also increases the risk of infection.

[0004] To address this, a portable hemodialysis machine with an anti-clogging circuit is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a portable hemodialysis machine with an anti-clogging circuit, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution: A portable hemodialysis machine with an anti-clogging circuit includes a housing. A reciprocating drive mechanism is installed inside the housing, and a piston membrane is fixedly installed within the circuit cavity inside the housing. The reciprocating drive mechanism drives the piston membrane to reciprocate for blood pumping. A sealing cap is fixedly installed at one end of the housing, and connecting ends are fixedly installed at the two openings of the sealing cap. A flow monitoring mechanism is provided in the mounting base on the surface of the connecting ends. An anticoagulant anti-clogging mechanism is fixedly connected to the end of the blood inlet connecting end. After the flow monitoring mechanism detects that the flow difference is greater than a set value, it controls the anticoagulant anti-clogging mechanism to add anticoagulant to the circuit. One-way valves are provided on both sets of connecting ends.

[0007] Furthermore, an end cap is provided at the other end of the housing, a battery mounting bracket is fixedly installed on the inner wall of the housing, and a storage battery is fixedly installed inside the battery mounting bracket, a controller is fixedly installed on one side of the inner wall of the housing, and a handle is fixedly installed on the top surface of the housing.

[0008] Furthermore, a limiting ring is fixedly installed on the inner wall of the opening for blood entry on the surface of the sealing cover, and an ultrafine filter screen is inserted into the opening for blood entry.

[0009] Furthermore, the reciprocating drive mechanism includes a mounting frame fixedly installed on the inner wall of one side of the housing. A motor is fixedly installed on the surface of the mounting frame. An eccentric disk is fixedly connected to the output end of the motor through the mounting frame. A rod is movably inserted into the mounting frame. A connecting rod is rotatably installed on the surface of the rod. The connecting rod is rotatably inserted into the shaft on the surface of the eccentric disk. A spring is sleeved on the surface of the rod. The two ends of the spring are fixedly connected to the rod and the inner wall of one side of the housing, respectively. The end of the rod is fixedly connected to a piston diaphragm.

[0010] Furthermore, the flow monitoring mechanism includes a flow sensor inserted into the mounting base, a control regulator is fixedly installed on one side wall of the sealing cover, and a wire is connected to the surface of the flow sensor, with the end of the wire being plugged into the socket of the control regulator via a plug.

[0011] Furthermore, the anticoagulation and anti-clogging mechanism includes a pipe fixedly inserted into the end of the blood inlet connection head, a support is provided on the pipe, a frame is threaded on the surface of the support, a medicine box is fixedly installed inside the frame, the medicine box is inserted into the inside of the support, and a drug control mechanism is provided on the frame and the medicine box.

[0012] Furthermore, the one-way valves on the two sets of connecting ends are set in opposite directions to control the direction of blood flow.

[0013] The beneficial effects of this invention are as follows: The reciprocating drive mechanism drives the piston membrane to reciprocate within the circuit cavity, generating pumping power to circulate blood in the dialysis circuit. Blood flows in through an opening in the sealed cap, passes through the connection end, and enters extracorporeal circulation. The flow monitoring mechanism monitors the blood flow at the inlet and outlet ends in real time. When the flow at the inlet end is significantly lower than that at the outlet end, it indicates that a thrombus may be forming or a blockage may have occurred in the circuit. At this time, the anticoagulation and anti-blockage mechanism is immediately activated to precisely inject anticoagulant into the inlet blood line, actively dissolving the initial thrombus and preventing the blockage from expanding. This avoids the need for manual shutdown and cleaning as described in the background technology, ensuring the continuity and safety of dialysis. The one-way valves at the two connection ends ensure unidirectional blood flow. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a partial side view of the present invention; Figure 4 This is a front sectional view of the present invention; Figure 5 This is the present invention. Figure 4 Enlarged view of part A; Figure 6 This is the present invention. Figure 4 Enlarged view of part B; Figure 7 This is a partial exploded view of the present invention; Figure 8 This is a partial side sectional view of the present invention; Reference numerals: 1. Housing; 11. Battery holder; 12. Battery; 13. Controller; 14. Handle; 2. End cap; 3. Reciprocating drive mechanism; 301. Mounting bracket; 302. Motor; 303. Eccentric disc; 304. Connecting rod; 305. Rod body; 306. Spring; 4. Piston diaphragm; 5. Sealing cap; 51. Limiting ring; 6. Ultrafine filter; 7. Connecting end; 71. Mounting base; 8. Flow monitoring mechanism; 801. Flow sensor; 802. Wire; 803. Controller; 9. Anti-coagulation and anti-clogging mechanism; 901. Pipe; 902. Support; 903. Frame; 904. Agent tank; 905. Piston plate; 906. Guide rod; 907. Internally threaded sleeve rod; 908. Micro-controlled motor; 909. Threaded rod; 10. One-way valve. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0019] like Figures 1 to 8 As shown, a portable hemodialysis machine with an anti-clogging circuit includes a housing 1. A reciprocating drive mechanism 3 is provided inside the housing 1, and a piston membrane 4 is fixedly installed in the circuit cavity inside the housing 1. The reciprocating drive mechanism 3 drives the piston membrane 4 to reciprocate for blood pumping operation. A sealing cover 5 is fixedly installed at the end of the housing 1. A connecting end 7 is fixedly installed at each of the two openings of the sealing cover 5. A flow monitoring mechanism 8 is provided in the mounting seat 71 on the surface of the connecting end 7. An anticoagulant anti-clogging mechanism 9 is fixedly connected to the end of the connecting end 7 used for blood inlet. After the flow monitoring mechanism 8 detects that the flow difference is greater than a set value, it controls the anticoagulant anti-clogging mechanism 9 to add anticoagulant to the circuit. A one-way valve 10 is provided on both sets of connecting ends 7.

[0020] The one-way valves 10 on the two sets of connecting ends 7 are set in opposite directions to control the flow of blood.

[0021] More specifically, the one-way valve 10 of the blood inlet connection 7 only allows blood to flow from outside the patient into the device, while the one-way valve 10 of the blood return connection 7 only allows processed blood to flow back from the device into the patient.

[0022] The other end of the housing 1 is covered with an end cap 2. A battery mounting bracket 11 is fixedly installed on the inner wall of the housing 1, and a storage battery 12 is fixedly installed inside the battery mounting bracket 11. A controller 13 is fixedly installed on one side of the inner wall of the housing 1, and a handle 14 is fixedly installed on the top surface of the housing 1.

[0023] More specifically, the battery holder 11 and the battery 12 inside it provide portable power for the entire device, which is the basis for realizing the portability of the device. The controller 13, as the central processing unit, coordinates all actions such as reciprocating drive, flow monitoring and anticoagulant injection.

[0024] A limiting ring 51 is fixedly installed on the inner wall of the opening for blood inlet on the surface of the sealing cap 5, and an ultrafine filter 6 is inserted into the opening for blood inlet.

[0025] More specifically, when blood is drawn from the patient, it is pre-treated through an ultra-fine filter 6 to remove any large fibrin clumps or other impurities that may be present, thereby reducing the risk of blockage in subsequent tubing and dialyzers from the source.

[0026] The reciprocating drive mechanism 3 includes a mounting bracket 301 fixedly installed on the inner wall of one side of the housing 1. A motor 302 is fixedly installed on the surface of the mounting bracket 301. An eccentric disk 303 is fixedly connected to the output end of the motor 302 through the mounting bracket 301. A rod 305 is movably inserted into the mounting bracket 301. A connecting rod 304 is rotatably installed on the surface of the rod 305. The connecting rod 304 is rotatably inserted into the shaft on the surface of the eccentric disk 303. A spring 306 is sleeved on the surface of the rod 305. The two ends of the spring 306 are fixedly connected to the rod 305 and the inner wall of one side of the housing 1, respectively. The end of the rod 305 is fixedly connected to the piston diaphragm 4.

[0027] More specifically, the eccentric disk 303 at its output end is driven to rotate by the motor 302. One end of the connecting rod 304 is rotatably connected to the eccentric shaft of the eccentric disk 303, and the other end is rotatably connected to the rod body 305. The rotational motion of the eccentric disk 303 is converted into the linear reciprocating motion of the rod body 305 through the connecting rod 304. The spring 306 provides the restoring force to assist the return stroke of the rod body 305 and make the motion smoother. Finally, the end of the rod body 305 drives the piston diaphragm 4 to reciprocate and deform, producing a gentle, pulsating pumping effect.

[0028] The flow monitoring mechanism 8 includes a flow sensor 801 inserted into the mounting base 71, a control regulator 803 fixedly installed on one side wall of the sealing cover 5, and a wire 802 connected to the surface of the flow sensor 801. The end of the wire 802 is plugged into the socket of the control regulator 803 via a plug.

[0029] More specifically, the flow sensor 801 is inserted into the mounting base 71 of the connection terminal 7, and its sensing part directly contacts the flowing blood to obtain flow data in real time. The flow data is transmitted to the plug through the wire 802. The controller 803 integrates a signal processing circuit, which is responsible for calculating and comparing the inlet and outlet flow rates to determine whether an anticoagulant needs to be injected.

[0030] The anticoagulation and anti-blocking mechanism 9 includes a pipe 901 fixedly inserted into the end of the blood inlet connection terminal 7. A support 902 is provided on the pipe 901. A frame 903 is threaded onto the surface of the support 902. A medicine box 904 is fixedly installed inside the frame 903. The medicine box 904 is inserted into the interior of the support 902. A drug control mechanism is provided on the frame 903 and the medicine box 904.

[0031] More specifically, the device is connected to the inlet line via pipe 901, and its support 902 is used to fix the entire mechanism. The frame 903 is screwed onto the support 902 to achieve detachable fixation. The medicine box 904 is fixed inside the frame 903 and is used to store anticoagulants. When the frame 903 is tightened, the output end of the medicine box 904 is connected to the support 902 and the inside of pipe 901. Its internal drug control mechanism is responsible for performing precise drug delivery.

[0032] The drug control mechanism includes a piston plate 905 that is movably inserted into the inside of the drug tank 904. A guide rod 906 is fixedly installed on the top surface of the piston plate 905. The guide rod 906 is movably inserted into the frame 903. A micro-control motor 908 is fixedly installed on the top surface of the frame 903. A threaded rod 909 is fixedly connected to the output end of the micro-control motor 908. An internally threaded sleeve rod 907 is fixedly installed on the top surface of the piston plate 905. The threaded rod 909 is threadedly inserted into the micro-control motor 908.

[0033] More specifically, after receiving a command from the controller 13, the micro-control motor 908 is activated, driving the threaded rod 909 at its output end to rotate. The internal threaded sleeve 907, which is threadedly engaged with the threaded rod 909, converts the rotational motion into linear motion. The lifting and lowering of the internal threaded sleeve 907 is guided by the guide rod 906, which drives the piston plate 905 to move smoothly downward in the medicine tank 904, thereby accurately pressing the predetermined dose of anticoagulant into the pipeline 901 and mixing it into the blood.

[0034] After the frame 903 is threadedly connected to the outer surface of the support 902, the output end of its medicine box 904 is inserted into the interior of the support 902.

[0035] More specifically, when the frame 903 is fully connected to the support 902 by threads and tightened, the output port at the bottom of the medicine tank 904 will be tightly connected and connected to the flow channel inside the support 902.

[0036] In summary: The reciprocating drive mechanism 3 drives the piston membrane 4 to reciprocate within the circuit cavity, generating pumping power to circulate blood in the dialysis circuit. Blood flows in through an opening in the sealing cap 5, passes through the connecting end 7, and enters extracorporeal circulation. The flow monitoring mechanism 8 monitors the blood flow at the inlet and outlet ends in real time. When the flow rate at the inlet end is significantly lower than that at the outlet end, it indicates that a thrombus may be forming or a blockage may have occurred in the circuit. At this time, the anticoagulation and anti-blockage mechanism 9 is immediately activated to precisely inject anticoagulant into the inlet blood circuit, actively dissolving the initial thrombus and preventing the blockage from expanding. This avoids the need for manual shutdown and cleaning as described in the background art, ensuring the continuity and safety of dialysis. The one-way valves 10 on the two connecting ends 7 ensure unidirectional blood flow.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A portable hemodialysis apparatus for preventing a blockage of a circuit, characterized by, The utility model provides a blood pump, including the shell (1), the inside of shell (1) is provided with reciprocating drive mechanism (3), and the inside of shell (1) is fixedly installed with piston film (4) in circuit cavity, and piston film (4) is driven reciprocating for pumping blood operation by reciprocating drive mechanism (3), the end of shell (1) is fixedly installed with sealing cover (5), two openings of sealing cover (5) are fixedly installed with connecting end (7) respectively, the mounting seat (71) of connecting end (7) surface is equipped with flow monitoring mechanism (8), wherein the end of the blood inlet connecting end (7) is fixedly connected with the anti -coagulation mechanism (9) of preventing block, after the flow difference of flow monitoring mechanism (8) is detected greater than the set value, control anti -coagulation mechanism (9) and add anticoagulant in circuit, both groups of connecting end (7) are provided with check valve (10).

2. A portable hemodialysis apparatus of claim 1, wherein, The other end cover of shell (1) is equipped with end cover (2), the inner wall of shell (1) is fixedly installed with battery fixing frame (11), and the battery fixing frame (11) is fixedly installed with battery (12) in, the inner wall of one side of shell (1) is fixedly installed with controller (13), the top surface of shell (1) is fixedly installed with handle (14).

3. A portable hemodialysis machine with anti-clogging circuit according to claim 1, characterized in that, The inner wall of the opening of sealing cover (5) for blood inlet is fixedly installed with limit ring (51), and the opening for blood inlet is inserted with superfine filter screen (6).

4. The portable hemodialysis machine of claim 1, wherein, The reciprocating drive mechanism (3) includes the mounting bracket (301) fixedly installed on the inner wall of one side of the shell (1), the motor (302) is fixedly installed on the surface of the mounting bracket (301), the eccentric disc (303) is fixedly connected to the output end of the motor (302) penetrating through the mounting bracket (301), the rod body (305) is movably inserted into the mounting bracket (301), the connecting rod (304) is rotatably installed on the surface of the rod body (305), the shaft on the surface of the connecting rod (304) is rotatably inserted into the eccentric disc (303), the spring (306) is sleeved on the surface of the rod body (305), the two ends of the spring (306) are fixedly connected with the rod body (305) and the inner wall of one side of the shell (1) respectively, and the end of the rod body (305) is fixedly connected with the piston film (4).

5. The portable hemodialysis machine of claim 1, wherein, The flow monitoring mechanism (8) includes the flow sensor (801) inserted into the mounting seat (71), the control regulator (803) is fixedly installed on the side wall of the sealing cover (5), the wires (802) are connected to the surface of the flow sensor (801), and the end of the wires (802) is inserted into the jack of the control regulator (803) through the plug.

6. A portable hemodialysis machine with anti-clogging circuit according to claim 1, characterized in that, The anti -coagulation mechanism (9) includes the pipeline (901) fixedly inserted into the end of the blood inlet connecting end (7), the support (902) is arranged on the pipeline (901), the frame body (903) is threadedly sleeved on the surface of the support (902), the medicine box (904) is fixedly installed in the frame body (903), the medicine box (904) is inserted into the inside of the support (902), and the control medicine mechanism is arranged on the frame body (903) and the medicine box (904).

7. A portable hemodialysis apparatus of the anti-clogging circuit according to claim 6, characterized in that, The medicine control mechanism comprises a piston plate (905) movably inserted into the medicine box (904), the top surface of the piston plate (905) is fixedly provided with a guide rod (906), the guide rod (906) is movably inserted into the frame body (903), the top surface of the frame body (903) is fixedly provided with a micro-control motor (908), the output end of the micro-control motor (908) is fixedly connected with a threaded rod (909), the top surface of the piston plate (905) is fixedly provided with an internally-threaded sleeve rod (907), and the threaded rod (909) is screwedly inserted into the micro-control motor (908).

8. A portable hemodialysis apparatus of the anti-clogging circuit according to claim 6, characterized in that, When the frame body (903) is screwedly connected with the outer surface of the support (902), the output end of the medicine box (904) is movably inserted into the inside of the support (902).

9. The portable hemodialysis device of claim 1, wherein, The one-way valves (10) on the two groups of connecting end heads (7) are oppositely arranged to control the direction of blood flow.

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