Online B powder device for hemodiafiltration

Abstract

The utility model discloses an on-line B powder device for hemodiafiltration, which comprises a dry powder bag and a support component positioned in the dry powder bag, the dry powder bag is made of flexible materials, and the support component is made of rigid materials and is used for longitudinally supporting the dry powder bag and assisting the end part of the B powder device to be accurately connected with a dialysis machine; the supporting assembly comprises two end portions of the same structure and two supporting rods, and the two ends of the supporting rods extend into and are fixed to the end portions respectively. The dry powder bag comprises a first subarea, a second subarea and third subareas, the inner wall of the first subarea is used for containing B powder, the two ends extending in the vertical direction of the first subarea are the third subareas, the third subareas are used for being fixedly connected with part of the outer walls of the ends, and therefore the ends and the dry powder bag form a sealed environment. The two ends extending in the transverse direction of the first subarea are the second subareas, and the second subareas enable the two layers of flexible materials of the first subarea to be welded together through hot melting welding.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to an online B-powder device for hemodialysis filtration. Background Technology

[0002] A hemodialysis device generally consists of a dialysis machine, a hemodialysis filter, and dialysis tubing. It is mainly used to treat acute and chronic renal failure and poisoning diseases. It uses the principle of semipermeable membranes to exchange or remove metabolic waste, excess water, and electrolytes from the patient's blood through diffusion, convection, and filtration, so that the patient's internal environment is close to that of a normal person, thereby achieving the purpose of purifying the blood.

[0003] Currently, hemodialysis uses both B-powder and A-powder inline devices for hemodialysis and filtration. The B-powder inline device contains solid sodium bicarbonate. When in use, water is injected through the inlet at the top, allowing the water to flow through the cartridge and dissolve the sodium bicarbonate powder inside into a saturated sodium bicarbonate solution. The solution is then drawn from the outlet at the bottom and flows through the dialysis machine, where it is mixed with other dialysis solutions from upstream of the dialysis machine tubing.

[0004] Existing dry powder units mostly have a flexible inner liner structure inside the shell. Existing online B-powder units for dialysis and filtration, such as... Figure 2 As shown, it consists of a cylinder body 7 and a cylinder cover 6. The cylinder body and the cylinder cover are injection molded from polypropylene. The bottom of the cylinder is integrally formed with the cylinder body. A filter is provided at the bottom of the cylinder, but no filter is provided at the cylinder cover.

[0005] CN202096520U discloses an inline sodium bicarbonate (B-powder) device for hemodialysis and filtration, comprising six parts: a main body, a top cover, two overflow caps, a filter, a PP sintered filter element, and large-particle sodium bicarbonate. The filter is installed in a slot at the bottom of the main body, and a measured amount of sodium bicarbonate powder is filled into the main body as required. The top cover is fitted with a PP sintered filter element, which is ultrasonically welded to the top of the main body. Overflow caps are provided on the inlet and outlet pipes. However, this inline B-powder device is a disposable device with high manufacturing costs, placing a significant economic burden on patients requiring long-term dialysis.

[0006] Therefore, a low-cost online dry powder bag holder for hemodialysis and filtration is being considered. Summary of the Invention

[0007] The purpose of this invention is to provide an online B-powder device for hemodialysis filtration. The dry powder device changes the existing structure of the dry powder device with a flexible inner liner inside the shell, and uses an inexpensive PE bag as the dry powder bag. A rigid frame is set inside the flexible dry powder bag to support the dry powder bag, thus easily achieving the problem of connecting to hemodialysis and reducing the cost.

[0008] The utility model discloses a purpose is realized through the following technical schemes:

[0009] A blood dialysis filtration is with online B powder device, including dry powder bag and the support subassembly in dry powder bag inside, dry powder bag is made of flexible material, the support subassembly is rigid material, is used for vertical support dry powder bag and assist B powder device's end portion and dialysis machine accurate connection,

[0010] The support subassembly, including two identical end portions and two support rods, two end portions are identical, and the two ends of the support rod extend into and are fixed in the end portions respectively, the end portion has a vertical through channel inside, can be communicated with dry powder bag for liquid in the liquid inlet pipe of dialysis machine flows through one end portion and dry powder bag, and then flows out from the liquid outlet pipe of dialysis machine through another end portion, and the end portion is fixedly provided with a filter disc inside, and the mesh size of the filter disc is 100-400 mesh,

[0011] The dry powder bag includes a first partition, a second partition and a third partition, the inner wall of the first partition is used for placing B powder, two end portions extending in the vertical direction of the first partition are the third partition, and the third partition is used for fixedly connected with the part of the outer wall of the end portion, so as to form a sealed environment for the end portion and the dry powder bag, and two end portions extending in the transverse direction of the first partition are the second partition, and the second partition is welded together by hot melt welding.

[0012] Further, the end portion of the support subassembly includes an interface, a connecting portion and an interface support portion in sequence from the top end to the support rod, the interface, the connecting portion and the interface support portion have vertical through channels inside for the liquid from the liquid inlet pipe of the dialysis machine, the interface is located at the top and is used for connecting the liquid inlet pipe of the dialysis machine, the interface support portion is axially provided with two through holes, the through holes are symmetrically located on both sides of the interface support portion respectively, and the diameters of the through holes are matched with the diameters of the support rods, so that the support rods are inserted into the holes.

[0013] Further, at least part of the components of the interface, the connecting portion, the interface support portion and the support rod are integrally formed or are independent components fixed together by hot melt welding.

[0014] Further, an additional sealing cap is provided on the outer wall of the interface, the inner contour of the sealing cap is matched with the outer contour of the interface, and the sealing cap is sleeved on the interface located at the top to seal the interface.

[0015] Further, a flange is provided on the outer wall of the connecting portion and protrudes outward along the radial direction of the connecting portion, a groove is formed between the flange and the interface support portion, and an external fixing device is clamped in the groove, so that the support subassembly is fixed with the dialysis machine.

[0016] Further, the radial cross-sectional shape of the interface support part is selected from one of an olive shape, a circle, and an ellipse.

[0017] Further, a radial groove is formed on the side wall of the interface support part to reduce self-weight.

[0018] Further, the dry powder bag is made of polyethylene, and the support rod is integrally injection molded in PP, PE or ABS material.

[0019] Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

[0020] The dry powder device changes the structure of the existing dry powder device shell with a flexible inner container, uses a cheap PE bag as a dry powder bag, sets a rigid frame body in the flexible dry powder bag, thereby supporting the dry powder bag, and thus simply realizes connection with hemodialysis and the problem of low cost;

[0021] The dry powder device sets a support assembly and a dry powder bag as a whole, and only two support rods arranged in the dry powder bag are needed to realize vertical support of the flexible dry powder bag, the space of the overall device is reduced, packaging is more convenient, and storage space is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the support assembly in the online dry powder device for hemodialysis filtration according to the utility model;

[0023] Figure 2 is a structural schematic view of the dry powder bag in the online dry powder device for hemodialysis filtration according to the utility model;

[0024] Figure 3 is Figure 1 a structural schematic view of the support assembly set in the dry powder bag.

[0025] Among them,

[0026] 1: interface; 2: connecting part; 3: interface support part; 4: support rod;

[0027] 5: dry powder bag; 51: first partition; 52: second partition; 53: third partition DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, beneficial effects, and significant advancements of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, all the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] like Figure 3 As shown, an online B-powder device for hemodialysis filtration includes a dry powder bag 5 and a support assembly located inside the dry powder bag. The dry powder bag 5 is made of a flexible material, and the support assembly is made of a rigid material to support the dry powder bag.

[0030] like Figure 1 As shown, the support assembly is a symmetrical structure, comprising two identical ends and a support rod 4 connecting the two ends. The two ends are structurally identical, with no distinction between upper and lower parts, and no need to differentiate between them during use. Specifically, each end, from its top to the support rod 4, sequentially includes an interface 1, a connecting portion, and an interface support portion 3. The interface 1, connecting portion, and interface support portion 3 can be integrally formed or are independent components fixed together by hot-melt welding.

[0031] The interface 1, connecting part 2, and interface support part 3 have vertically penetrating channels for the flow of liquid from the dialysis machine's inlet pipe. The interface 1, located at the top, connects to the dialysis machine's inlet pipe, and an additional sealing cap is fitted onto its outer wall. The inner contour of the sealing cap matches the outer contour of the interface 1, sealing the interface 1 at the top. The connecting part 2 is a hollow cylinder with a flange extending radially outward on its outer wall. A groove is formed between the flange and the interface support part 3 to engage an external fixing device, thus more securely fixing the support assembly to the dialysis machine. The radial cross-section of the interface support part 3 is olive-shaped. An olive-shaped cross-section was chosen for the second section to facilitate welding; however, circular, elliptical, or other geometric shapes could also be used. Furthermore, the interface support part 3 has an axially oriented through hole on each side of the channel. The diameter of the through hole matches the diameter of the support rod 4, allowing the support rod 4 to be inserted precisely into the hole. To reduce its weight, a radial groove is provided on the side wall of the interface support 3.

[0032] A filter is arranged in the passage between the connecting part 2 and the interface support part 3, which is ultrasonically welded to the inner wall of the interface support part 3, for filtering the liquid flowing through the filter from the liquid inlet pipe and filtering the liquid flowing into the liquid outlet pipe, preventing sodium bicarbonate particles from flowing into the liquid outlet pipe. The filter is made of nylon, PE or PP, and has a mesh size of 100-400 mesh.

[0033] As shown in Figure 2 , the dry powder bag is a disposable PE bag made of polyethylene with a thickness of 0.2 mm, and contains granular crystalline sodium bicarbonate, but other solid forms can also be used. The dry powder bag includes two openings and a bag body, which is formed by hot melt welding two rectangular PE films on both sides to form a bag body with two end openings. The bag body includes a first partition 51, a second partition 52 and a third partition 53, and the two opposite ends extending in the vertical direction of the first partition 51 are the openings, and the inner wall of the first partition 51 is used to place the B powder. The first partition is provided with a second partition 52 on each of the two lateral sides, and the second partition 52 is a hot melt welded part. Since the second partition is two layers of PE film welded together, it also has a certain supporting effect and is convenient to hold. The first partition is provided with a third partition 53 on each of the two longitudinal sides (i.e. the opening), and the PE film in the third partition 53 is fixedly connected with the outer wall of the interface support part 3 by hot melt welding, so as to form a sealed environment between the interface support part 3 and the dry powder bag 5 to prevent contamination.

[0034] The length of the support rod 4 is adapted to the height of the dry powder bag 5, and the diameter is suitable for the through hole on the interface support part 3. According to actual needs, the support rod 4 is made of PP, PE or ABS material by injection molding.

[0035] In order to clearly show the connection relationship between the dry powder bag 5 and the support assembly, Figure 3 , the support rod 4 inside the dry powder bag 5 is represented by a dashed line, and in practical application, the dry powder bag can be transparent or other colors according to actual needs.

[0036] According to actual conditions, the interface 1, the connecting part 2, the interface support part 3 and the support rod 4 can also be integrally formed.

[0037] In use, the sealing cap at the interface 1 is removed, the two interfaces 1 are respectively aligned with the liquid inlet pipe and the liquid outlet pipe of the dialysis machine, one end of the additional fixing device is installed at the clamping groove of the connecting part 2, and the other end of the fixing device is installed at the clamping position of the dialysis machine, so that the installation is completed. The interface 1 and the dry powder bag 5 are communicated for the liquid in the liquid inlet pipe to flow through the supporting assembly and the dry powder bag and then flow out from the liquid outlet pipe; the supporting assembly is used for supporting the dry powder bag 5 and assisting the accurate connection of the end part with the dialysis machine, so that the dry powder bag with flexible material is longitudinally supported and can be accurately connected with the dialysis machine.

[0038] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. The non-essential improvements, adjustments or replacements made by those skilled in the art according to the content of the present application are all within the scope of the present application.

Claims

1. A hemodiafiltration apparatus with an online B powder device, characterized by, The support assembly includes two structurally identical end portions and two support rods (4), the two end portions are structurally identical, and the two ends of the support rods (4) respectively extend into and are fixed in the end portions; the end portions have vertical through channels inside, which can communicate with the dry powder bag (5) and are used for flowing the liquid in the liquid inlet pipe of the dialysis machine through one of the end portions and the dry powder bag (5) and then flowing out of the liquid outlet pipe of the dialysis machine through the other end portion, and the end portions are fixedly provided with filter sheets inside, and the mesh size of the filter sheets is 100-400 meshes; The dry powder bag includes a first subarea (51), a second subarea (52) and a third subarea (53), the inner wall of the first subarea (51) is used for placing B powder, two end portions extending in the vertical direction of the first subarea (51) are the third subarea (53), the third subarea (53) is used for fixedly connecting with part of the outer wall of the end portion, so as to form a sealed environment for the end portion and the dry powder bag (5); two end portions extending in the transverse direction of the first subarea (51) are the second subarea (52), and the second subarea (52) is welded by hot melting welding to weld together two layers of flexible materials of the first subarea. The end portion of the support assembly includes an interface (1), a connecting portion and an interface support portion (3) from the top end to the support rod (4) in sequence, the interface (1), the connecting portion (2) and the interface support portion (3) have vertical through channels inside, which are used for flowing the liquid from the liquid inlet pipe of the dialysis machine; the interface (1) is located at the top and is used for connecting the liquid inlet pipe of the dialysis machine; the interface support portion (3) is axially provided with two through holes, the through holes are respectively and symmetrically located on both sides of the interface support portion (3), and the diameters of the through holes are matched with the diameter of the support rod (4), so that the support rod (4) is inserted into the holes.

2. The online B powder device for hemodiafiltration according to claim 1, characterized in that, At least part of the components of the interface (1), the connecting portion (2), the interface support portion (3) and the support rod (4) is integrally formed.

3. The online B powder device for hemodiafiltration according to claim 2, characterized in that, The outer wall of the interface (1) is additionally provided with a sealing cap, the inner contour of the sealing cap is matched with the outer contour of the interface (1), and the sealing cap is sleeved on the interface (1) located at the top to seal the interface (1).

4. The online B powder device for hemodiafiltration according to claim 2, characterized in that, The radial cross-sectional shape of the interface support portion (3) is selected from one of olive type, circular shape and oval.

5. The online B powder device for hemodiafiltration according to claim 2, characterized in that, A radial groove is formed in the side wall of the interface support portion (3).

6. The online B powder device for hemodiafiltration according to claim 2, wherein The dry powder bag (5) is made of polyethylene, and the support rod (4) is integrally injection molded by PP, PE or ABS material.

7. The online B powder device for hemodiafiltration according to claim 2, wherein ​

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