Double-lumen liquid supplementing pipeline for hemodialysis filtration

Abstract

The utility model discloses a double -cavity liquid supplementing pipeline for hemodialysis filtration, including liquid inlet pipe and peristaltic pump, and one end of liquid inlet pipe is connected with double -cavity liquid supplementing pipe, and the inside of double -cavity liquid supplementing pipe is provided with two liquid flow passages, and the other end of double -cavity liquid supplementing pipe is connected with single branch pipe one and single branch pipe two respectively corresponding two liquid flow passages. The double -cavity liquid supplementing pipe that the utility model adopts, and its inside contains two liquid flow passages, and utilizes valve subassembly to carry out separate control, can use on original dialysis machine and complete front and rear replacement liquid supplement, reaches again economic and efficient dialysis treatment.

Description

Technical Field

[0001] This utility model relates to the field of hemodialysis technology, specifically to a dual-chamber fluid replenishment tubing for hemodialysis filtration. Background Technology

[0002] Dialysis patients require hemofiltration therapy, which includes fluid replacement methods divided into pre-replacement and post-replacement. Pre-replacement and post-replacement refer to the fluid replacement site being located at the front and rear ends of the dialysis filter, respectively. Pre-replacement has the fluid replacement site at the front of the filter, while post-replacement has the fluid replacement site at the rear. Each method has its advantages and disadvantages. The advantages of stand-alone pre-replacement are that it facilitates blood dilution, promotes the clearance of protein-bound solutes, reduces membrane stress, reduces potential albumin loss, and the ultrafiltration rate is not limited by blood flow rate. The disadvantages of pre-displacement alone are low solute removal rate and high displacement fluid consumption.

[0003] The advantages of post-displacement alone are high solute removal rate and low displacement fluid consumption; The disadvantages of post-replacement alone are that it can easily lead to hemoconcentration, reduce hydrostatic pressure and membrane solute permeability, increase membrane stress, and potentially cause albumin loss.

[0004] In recent years, three-pump dialysis machines have emerged both domestically and internationally, enabling front and rear replacement, but this increases equipment costs and the likelihood of malfunctions.

[0005] Since both anterior and posterior replacement have their own advantages and disadvantages, for patients with different conditions requiring dialysis, multiple tubing needs to be set up on the dialysis machine to meet the needs of either anterior or posterior replacement. Instead, anterior or posterior replacement cannot be used on a single dialysis machine at the same time, which prevents the dialysis machine from achieving a more efficient dialysis effect. Utility Model Content

[0006] The purpose of this invention is to provide a dual-lumen rehydration tubing for hemodialysis filtration to address the aforementioned shortcomings in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A dual-lumen fluid replenishment tubing for hemodialysis filtration includes an inlet tube, one end of which is connected to a dual-lumen fluid replenishment tube via a split connector, and the dual-lumen fluid replenishment tube has two fluid flow channels inside. The other end of the dual-lumen replenishment tube is connected to two separate branch pipes, namely branch pipe one and branch pipe two, respectively, corresponding to two liquid flow channels. The dual-lumen fluid replenishment tube includes a tube shell, and the inside of the tube shell is provided with a layered plate, through which the tube shell forms two fluid flow channels; Limiting blocks are provided at both ends of the dual-chamber replenishment tube, corresponding to the peristaltic pump.

[0008] Preferably, one end of the first separate branch pipe and the second separate branch pipe are respectively connected to the second docking replacement port and the first docking replacement port; The intersection of the second docking replacement port and the first docking replacement port is provided with the same tee pipe; the end of the tee pipe away from the second docking replacement port and the first docking replacement port is provided with a front and rear mixing port.

[0009] Preferably, the ratio of the cross-sectional areas of the two fluid flow channels inside the tube shell is 1 to 4.

[0010] Preferably, the two ends of the dual-lumen replenishment tube are connected to the inlet tube, a single branch tube one, and a single branch tube two, respectively, via connectors.

[0011] Preferably, symmetrically distributed baffles are provided on the inner side walls at both ends of the tube shell; Both sides of the stop block are designed with rounded transitions; The blocks are symmetrically distributed about the layered plate.

[0012] Preferably, both sides of the dual-lumen replenishment tube are provided with valve assemblies for opening and closing the liquid flow channel. The valve assembly includes two brackets fixedly installed on the side wall of the tube shell. A screw nut is fixedly installed at the end of the bracket, and a screw is inserted into the internal thread of the screw nut. One end of the lead screw is provided with a bearing seat, and a flow cut-off plate is fixedly connected to the side wall of the bearing seat; A handwheel is fixedly installed at the other end of the lead screw, and a locking nut is threaded onto the external thread of the lead screw, with one side of the outer wall of the locking nut in contact with the lead screw nut.

[0013] Preferably, a sliding port is provided on the outer wall of the tube shell, and the flow cut-off plate is slidably inserted into the inside of the sliding port.

[0014] In the above technical solution, the dual-lumen fluid replenishment tubing for hemodialysis filtration provided by this utility model has the following beneficial effects: The dual-lumen replenishment pipe used contains two liquid flow channels inside, which can realize the liquid pumping of two branches using a single pipe. Moreover, by measuring the cross-sectional area of ​​the two liquid flow channels, different liquid inlet requirements can be met.

[0015] Furthermore, by using valve assemblies for individual control, it is possible to use existing dialysis machines to complete pre- and post-displacement fluid replacement, achieving both economical and efficient dialysis treatment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the structure of a dual-lumen rehydration tubing for hemodialysis filtration according to Embodiment 1 of the present invention.

[0018] Figure 2 This is a schematic diagram of the installation structure of the dual-lumen rehydration tubing and peristaltic pump provided in Embodiment 1 of the present invention for a dual-lumen rehydration tubing for hemodialysis filtration.

[0019] Figure 3 This is a schematic diagram of the structure of the dual-lumen fluid replenishment tube and the three-way tube provided in Embodiment 2 of the present invention for a dual-lumen fluid replenishment tube for hemodialysis filtration.

[0020] Figure 4 This is a three-dimensional view of the structure of the dual-lumen rehydration tubing provided in Embodiment 2 of the present invention for a dual-lumen rehydration tubing for hemodialysis filtration.

[0021] Figure 5 This is a partial cross-sectional view of the structure of the dual-lumen rehydration tubing provided in Embodiment 2 of the present invention for a dual-lumen rehydration tubing for hemodialysis filtration.

[0022] Figure 6 This is a schematic diagram of the valve assembly structure provided in Embodiment 2 of the dual-chamber fluid replenishment pipeline for hemodialysis filtration according to this utility model.

[0023] 1. End cap; 11. Peristaltic pump; 12. Limiting post; 20. Limiting block; 2. Connector 1; 21. Connector 2; 3. Dual-chamber replenishment tube; 31. Tube shell; 32. Layered plate; 33. Stop block; 4. Valve assembly; 41. Bracket; 42. Cut-off plate; 43. Bearing seat; 44. Lead screw; 45. Lead screw nut; 46. Handwheel; 47. Locking nut; 5. Individual branch pipe 1; 6. Individual branch pipe 2; 7. T-connector; 8. Docking replacement port 1; 9. Docking replacement port 2; 10. Front and rear mixing port. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1 like Figure 1-2As shown in the figure, this utility model provides a dual-lumen rehydration tubing for hemodialysis filtration, including an end 1. When the end 1 is immersed in a drug solution cylinder, the replenished substance can be delivered to the inlet pipe through the end 1. One end of the end 1 is provided with an inlet pipe, preferably a bent pipe, which is more conducive to the pipeline arrangement during hemodialysis. The end of the inlet pipe away from the end 1 is connected to a dual-lumen rehydration tubing 3 through a connector 2 that splits into two parts. The dual-lumen rehydration tubing 3 is a section of the tubing that is in direct contact with a peristaltic pump 11. The operation of the peristaltic pump 11 can drive the flow of liquid inside the dual-lumen rehydration tubing 3. The dual-lumen rehydration tubing 3 has two liquid flow channels inside. Through the two liquid flow channels, the effects of pre-replacement and post-replacement of rehydration can be achieved respectively. The effects of pre-replacement and post-replacement can also be achieved simultaneously to form a mixed pre-replacement effect. Specifically, the dual-lumen fluid replenishment tube 3 includes a tube shell 31, and the inside of the tube shell 31 is provided with a layered plate 32. The tube shell 31 forms two fluid flow channels through the layered plate 32. In different cases, the cross-sectional areas of the two channels can be set in different ratios such as 1:1, 3:7, 4:6, etc., to meet different usage conditions.

[0026] like Figure 2 As shown, limiting blocks 20 are provided at both ends of the dual-chamber replenishment tube 3. These blocks can be rectangular or other three-dimensional shapes with structures that guide the installation direction. The limiting blocks 20 cooperate with the body on both sides of the bottom of the peristaltic pump 11. For example, if the body is provided with a guide groove, the limiting blocks can be embedded in it. Alternatively, they can be directly set to an arch shape that matches the upper limit post 12 of the body. When the dual-chamber replenishment tube 3 is installed into the peristaltic pump 11, the two limiting blocks 20 are used in cooperation with the guide groove or the limiting post to limit and fix both ends of the dual-chamber replenishment tube 3. This prevents the dual-chamber replenishment tube 3 from twisting after it enters the peristaltic pump 11. This ensures that the plane of the layered plate is in contact with the pressure roller of the peristaltic pump, while the vertical surface of the non-layered plate is in contact with the pressure roller of the peristaltic pump. This avoids conveying failures caused by pipeline deformation and ensures the intermittent compression of the peristaltic pump 11, thereby completing the flow of liquid.

[0027] In this embodiment, the other end of the dual-lumen replenishment tube 3 is connected to two liquid flow channels via a two-in-two-out connector 21, which are connected to separate branch tube 5 and separate branch tube 6. Separate branch tube 5 and separate branch tube 6 correspond to a liquid flow channel via the two-in-two-out connector 21. The replacement fluid entering through the inlet tube enters the interior of separate branch tube 5 and separate branch tube 6 through the liquid flow channel. Separate branch tube 5 and separate branch tube 6 are connected to the front and rear ends of the dialysis filter, respectively, to achieve the functions of pre-displacement and post-displacement. At the same time, flow controllers 24 and 23, such as clamps, are respectively installed on separate branch tube 5 and separate branch tube 6. By coordinating the clamping degree of the two clamps and the design of the dual-lumen flow channel, fine adjustment of the flow rate of the two separate branch tubes can be achieved.

[0028] In this embodiment, one end of the individual branch pipe 5 and the individual branch pipe 6 are respectively connected to the docking replacement port 2 9 and the docking replacement port 1 8. Alternatively, the individual branch pipe 5 and the individual branch pipe 2 6 can be connected to the docking replacement port 2 9 and the docking replacement port 1 8 respectively. Specifically, the intersection of the docking replacement port 2 9 and the docking replacement port 1 8 is provided with the same T-connector 7. The end of the T-connector 7 away from the docking replacement port 2 9 and the docking replacement port 1 8 is provided with a front and rear mixing port 10, and the replacement fluid flows out from the T-connector 7 to form a mixed replacement operation.

[0029] Example 2 like Figure 3-6 As shown in the figure, the present invention provides a dual-lumen fluid replenishment tubing for hemodialysis filtration, including a terminal 1, which is connected to a storage tank. The replenished substance can be transported to the inlet pipe through the terminal 1. One end of the terminal 1 is provided with an inlet pipe, which is more conducive to the pipeline layout during hemodialysis. The end of the inlet pipe away from the terminal 1 is provided with a dual-lumen fluid replenishment tube 3. The dual-lumen fluid replenishment tube 3 has two fluid flow channels inside. Through the two fluid flow channels, the pre-replacement and post-replacement effects of fluid replenishment can be achieved respectively, or the pre-replacement and post-replacement mixed replacement effects can be achieved simultaneously. Specifically, symmetrically distributed baffles 33 are provided on both sides of the inner wall of the tube shell 31, and two baffles 33 are provided inside each liquid flow channel, thereby reducing the diameter of the liquid flow channel and facilitating the opening and closing of the liquid flow channel by the valve assembly 4. Specifically, both sides of the baffle 33 are designed with rounded transitions. The rounded transitions on the baffle 33 ensure smooth flow of the replenishing fluid and prevent blockage and unstable flow rate during replenishment. Specifically, the baffles 33 are symmetrically distributed about the layered plate 32, and two baffles 33 are provided inside each liquid flow channel.

[0030] In this embodiment, valve assemblies 4 for opening and closing the liquid flow channel are provided on both sides of the dual-chamber replenishment pipe 3.

[0031] Specifically, the valve assembly 4 includes two brackets 41 fixedly mounted on the side wall of the pipe shell 31. A screw nut 45 is fixedly mounted at the end of the bracket 41. A screw 44 is threaded into the inside of the screw nut 45. The height of the screw 44 can be adjusted by rotating the screw 44 inside the screw nut 45. Specifically, a bearing seat 43 is provided at one end of the lead screw 44, and a flow cut-off plate 42 is fixedly connected to the side wall of the bearing seat 43. By rotating the lead screw 44, the flow cut-off plate 42 can be driven to move. After the flow cut-off plate 42 is pulled out inside the tube shell 31, the corresponding liquid flow channel can be opened. Specifically, a handwheel 46 is fixedly installed at the other end of the lead screw 44, and a locking nut 47 is sleeved on the external thread of the lead screw 44. One side of the outer wall of the locking nut 47 contacts the lead screw nut 45. After the opening position of the throttling plate 42 is adjusted by using the lead screw 44, the locking nut 47 is used to further fix the lead screw 44, ensuring the stability of the throttling plate 42. Specifically, a sliding port is provided on the outer wall of the tube shell 31, and the flow cut-off plate 42 is slidably inserted into the inside of the sliding port. The flow cut-off plate 42 can seal and slide inside the sliding port to realize the opening and closing of the liquid flow pipeline.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dual-lumen rehydration tubing for hemodialysis filtration, characterized in that, It includes an inlet pipe and a peristaltic pump (11). One end of the inlet pipe is connected to a double-chamber replenishment pipe (3) through a connector (2) that splits into two. The double-chamber replenishment pipe (3) has two liquid flow channels inside. The other end of the double-lumen replenishment tube (3) is connected to two separate branch tubes (5) and (6) respectively, corresponding to two liquid flow channels. The dual-lumen replenishment tube (3) includes a tube shell (31), and a layered plate (32) is provided inside the tube shell (31). The tube shell (31) forms two liquid flow channels through the layered plate (32). Limiting blocks (20) are provided at both ends of the dual-chamber replenishment tube (3) and at the corresponding positions of the peristaltic pump (11).

2. The dual-lumen rehydration tubing for hemodialysis filtration according to claim 1, characterized in that, One end of the first branch pipe (5) and the second branch pipe (6) are respectively connected to the second docking replacement port (9) and the first docking replacement port (8). The intersection of the second docking replacement port (9) and the first docking replacement port (8) is provided with the same tee pipe (7); the end of the tee pipe (7) away from the second docking replacement port (9) and the first docking replacement port (8) is provided with a front and rear mixing port (10).

3. The dual-lumen rehydration tubing for hemodialysis filtration according to claim 1, characterized in that, The ratio of the cross-sectional areas of the two liquid flow channels inside the shell (31) is 1 to 4.

4. A dual-lumen rehydration tubing for hemodialysis filtration according to claim 1, characterized in that, The two ends of the dual-lumen replenishment tube (3) are connected to the inlet tube, the single branch tube 1 and the single branch tube 2 through a connector 1 (2) that splits into two and a connector 2 (21) that has two inlets and two outlets, respectively.

5. A dual-lumen rehydration tubing for hemodialysis filtration according to claim 1, characterized in that, Symmetrically distributed baffles (33) are provided on the inner side walls at both ends of the tube shell (31). Both sides of the stop (33) are set as rounded transitions; The blocks (33) are symmetrically distributed about the layered plate (32).

6. A dual-lumen rehydration tubing for hemodialysis filtration according to claim 5, characterized in that, Both sides of the dual-chamber replenishment tube (3) are provided with valve assemblies (4) for opening and closing the liquid flow channel. The valve assembly (4) includes two brackets (41) fixedly installed on the side wall of the tube shell (31). The end of the bracket (41) is fixedly installed with a screw nut (45), and the screw nut (45) has a screw (44) inserted into its internal thread. One end of the lead screw (44) is provided with a bearing seat (43), and a flow cut-off plate (42) is fixedly connected to the side wall of the bearing seat (43). A handwheel (46) is fixedly installed at the other end of the lead screw (44), and a locking nut (47) is threaded onto the external thread of the lead screw (44). One side of the outer wall of the locking nut (47) is in contact with the lead screw nut (45).

7. A dual-lumen rehydration tubing for hemodialysis filtration according to claim 6, characterized in that, The outer wall of the tube shell (31) is provided with a sliding socket, and the flow cut-off plate (42) is slidably inserted into the inside of the sliding socket.

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