Closed blood purification waste liquid discharge device

Abstract

The utility model discloses a kind of closed blood purification waste liquid discharge devices, it is related to medical appliance technical field, solve the problem that existing CRRT waste liquid collection process cannot be closed collection. The device includes waste liquid bag with extension pipe, negative pressure collector and matched support and pressing tool;Negative pressure collector is formed by flexible liquid storage bag, top cover, bottom cover and forms storage cavity, built-in compression spring, top cover is equipped with the upper mounting seat of drainage tube and exhaust port, flow regulator is configured on drainage tube. After pressing liquid storage bag exhausts gas, establish negative pressure by sealing exhaust port, when compression spring resets, automatically aspirate waste liquid by negative pressure, support realizes device stable placement, pressing tool cooperates with card slot to save labor and pressure, prevent negative pressure loss. The device realizes waste liquid closed collection, reduces nosocomial infection risk, can reduce medical care workload, convenient operation, adapts clinical CRRT treatment waste liquid collection demand.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a sealed collection device for blood purification waste liquid. Background Technology

[0002] During clinical CRRT (Continuous Renal Replacement Therapy), the waste fluid generated during treatment is collected in a waste fluid collection bag. Once the waste fluid collection bag is full, the waste fluid must be discharged and treated in a timely manner.

[0003] The current routine clinical waste liquid discharge method involves connecting an extension tube to the discharge valve at the bottom of the waste liquid collection bag, inserting the extension tube into an open waste liquid container, and manually opening the tube clamp to pour out the waste liquid. This method has the following problems: Firstly, once the waste fluid bag is full, a waste fluid container needs to be prepared and moved to a designated location. Then, the waste fluid in the waste fluid bag is transferred to the waste fluid container, which increases the workload of nursing staff. Secondly, the waste fluid container is an open design, which cannot achieve closed collection of waste fluid. The odor and harmful substances in the waste fluid are easy to volatilize and spread, which deteriorates the treatment environment and increases the risk of nosocomial infection.

[0004] Secondly, the extension tube and waste liquid container are not fixed together. During clinical operation, the end of the extension tube may slip out of the waste liquid container due to accidental situations, causing waste liquid to flow out and contaminate the treatment environment and surrounding equipment. To avoid this problem, the tube needs to be manually supported, which is time-consuming and laborious, further increasing the workload of medical staff. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model proposes a closed-loop blood purification waste liquid discharge device.

[0006] The technical solution to the technical problem solved by this utility model is as follows: A closed-loop blood purification waste liquid discharge device includes a waste liquid bag, an inlet pipe with an inlet valve at the upper end of the waste liquid bag, a drain pipe with a drain valve at the lower end, an extension pipe detachably connected to the end of the drain pipe, and a negative pressure collector. The negative pressure collector includes a flexible and compressible liquid storage bladder, with a top cover and a bottom cover connected to the top and bottom of the liquid storage bladder respectively, the three of which enclose a storage cavity; the upper mounting base is connected to a drainage tube and an exhaust port, the drainage tube is equipped with a flow regulator, the drainage tube is detachably connected to the extension tube, and the exhaust port is fitted with a detachable sealing plug. The reservoir is equipped with a compression spring inside, and the two ends of the compression spring are connected to the inner walls of the top cover and the bottom cover, respectively. When the liquid storage bladder is pressed to compress it, the gas in the storage cavity is discharged through the exhaust port. After being compressed to a preset position, the exhaust port is sealed by the sealing plug to maintain the negative pressure in the storage cavity. The flow regulator is opened to draw the waste liquid in the waste liquid bag through the negative pressure.

[0007] Preferably, the top cover has an upwardly protruding upper mounting seat, and the bottom cover has a downwardly protruding lower mounting seat; the two ends of the compression spring are respectively positioned and inserted into the upper mounting seat and the lower mounting seat.

[0008] Preferably, the top cover surface has a thickened ring around the circumference of the upper mounting base.

[0009] Preferably, the drainage tube is made of medical-grade PVC or latex tubing.

[0010] Preferably, the capacity of the negative pressure collector is set to 1000mL-5000mL.

[0011] Preferably, the device also includes a bracket adapted to the negative pressure collector. The bracket includes an upper ring and a lower ring arranged at intervals, connected by several vertical rods, forming a placement space inside the bracket. The negative pressure collector is built into the placement space inside the bracket.

[0012] Preferably, the lower ring body is also connected to at least two cross braces, and a positioning ring is fixedly connected above the cross braces. The positioning ring is coaxially arranged with the lower ring body, and the lower mounting base can be adapted to be inserted into the through hole of the positioning ring.

[0013] Preferably, it also includes a pressing tool, which includes a pressure plate that is movably fitted onto the outside of the upper mounting base, with the bottom of the pressure plate pressing against the surface of the thickened ring layer; the outer wall of the pressure plate is connected to two symmetrically arranged handles.

[0014] Preferably, the vertical rod is provided with a slot, and when the handle is moved to a preset position, the handle can be engaged with the slot by rotating the handle.

[0015] Preferably, the slot is formed by cutting or bending a vertical rod.

[0016] The above technical solution has the following advantages or beneficial effects: 1. This utility model, by setting a negative pressure collector, can realize the closed-loop absorption and collection of waste liquid, avoiding the volatilization and diffusion of waste liquid odor and harmful substances, which not only improves the treatment environment, but also effectively reduces the risk of nosocomial infection.

[0017] 2. By installing a compression spring inside the reservoir, pressing the reservoir will compress the spring synchronously and expel the internal gas. After sealing the plug, a stable negative pressure can be maintained. Opening the flow regulator can realize automatic aspiration of waste liquid, eliminating the need for manual emptying of waste liquid or special personnel to hold the tube, effectively reducing the workload of medical staff and greatly improving the convenience of clinical operation.

[0018] 3. By setting up a bracket that is compatible with the negative pressure collector, a stable support can be formed for it, which solves the problem of uneven bottom and difficulty in placement caused by the outward protrusion of the lower mounting base. It avoids tipping and displacement during aspiration, transportation and storage, improves the stability of the device, ensures the stable and orderly closed discharge of waste liquid, and meets the needs of clinical operation.

[0019] 4. By setting up a pressing tool and a slot on the vertical rod, the liquid storage bladder can be operated with less effort using the pressing tool; after pressing, the handle can be inserted into the slot to stably maintain negative pressure and prevent negative pressure loss, while also allowing the operator to free their hands to close the sealing plug, thus improving the convenience and continuity of operation. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] Figure 1 This is a schematic diagram of the structure of the closed-loop blood purification waste liquid discharge device proposed in this utility model.

[0022] Figure 2 yes Figure 1 A three-dimensional view of the medium-negative pressure collector.

[0023] Figure 3 yes Figure 2 Cross-sectional view of the medium negative pressure collector.

[0024] Figure 4 It is a three-dimensional structure when the negative pressure collector is used in conjunction with the support. Figure 1 (The reservoir is in an uncompressed state).

[0025] Figure 5 It is a three-dimensional structure when the negative pressure collector is used in conjunction with the support. Figure 2 (The reservoir is in an uncompressed state).

[0026] Figure 6 This is a schematic diagram of the separate structure of the negative pressure collector and the support.

[0027] Figure 7 This is a 3D view of the negative pressure collector and the support when used together (in the compressed state of the reservoir).

[0028] Figure 8 This is a schematic diagram of the negative pressure collector in another embodiment.

[0029] Figure 9 This is a schematic diagram of the structure of the vertical rod and the slot in one embodiment.

[0030] Figure 10 This is a schematic diagram of the vertical rod and the slot in another embodiment.

[0031] Explanation of reference numerals in the attached figures: 1. Waste liquid bag; 2. Drain pipe; 3. Inlet pipe; 4. Drain valve; 5. Extension pipe; 6. Drain pipe; 7. Flow regulator; 8. Negative pressure collector; 801. Vent valve; 81. Liquid reservoir; 82. Upper mounting base; 83. Lower mounting base; 84. Exhaust port; 85. Sealing plug; 86. Thickened ring layer; 87. Compression spring; 9. Lower ring body; 91. Cross brace; 92. Positioning ring; 10. Support leg; 11. Vertical rod; 111. Slot; 12. Upper ring body; 13. Pressure plate; 14. Handle. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] like Figure 1 - Figure 7 As shown in the figure, this embodiment proposes a closed-loop blood purification waste liquid discharge device, including a waste liquid bag 1. The upper end of the waste liquid bag 1 is provided with an inlet pipe 3 with an inlet valve for receiving the waste liquid generated during the blood purification process; the lower end is provided with a drain pipe 2 with a drain valve 4. The end of the drain pipe 2 is detachably connected to an extension pipe 5 for smoothly introducing the waste liquid into the subsequent collection structure to achieve orderly transportation of the waste liquid.

[0034] The closed-loop blood purification waste liquid discharge device also includes a negative pressure collector 8, which includes a flexible and compressible reservoir 81. The reservoir 81 is made of a sealing flexible material and can be repeatedly compressed and reset. In some embodiments, the reservoir 81 can adopt an accordion-style structure. The top and bottom of the reservoir 81 are respectively connected to a top cover and a bottom cover, which together form a closed storage cavity for storing the aspirated waste liquid. In some embodiments, the reservoir 81, the top cover and the bottom cover adopt an integral molding structure, which has better overall sealing and can effectively prevent waste liquid leakage.

[0035] The upper mounting base 82 is connected to a drainage tube 6 and an exhaust port 84. The drainage tube 6 can be made of medical-grade PVC or latex tubing and is equipped with a flow regulator 7, which allows for opening and closing of the tubing and flexible adjustment of the waste fluid suction speed. The drainage tube 6 and the extension tube 5 are detachably connected using a socket structure, ensuring convenient assembly and disassembly and reliable sealing. The exhaust port 84 is fitted with a removable sealing plug 85 to seal the exhaust port 84 and maintain negative pressure.

[0036] The reservoir 81 is equipped with a compression spring 87. The two ends of the compression spring 87 are connected to the inner walls of the top cover and the bottom cover, respectively. The compression spring 87 is mainly used to assist the reservoir 81 in returning to its original position after compression.

[0037] When in use, press the liquid storage bladder 81 to compress it, and the gas in the storage cavity will be discharged through the exhaust port 84. After being compressed to the preset position, the exhaust port 84 will be sealed by the sealing plug 85 to maintain the negative pressure in the storage cavity. Open the flow regulator 7, and use the pressure difference between the storage cavity and the waste liquid bag 1 to draw the waste liquid in the waste liquid bag 1 through negative pressure to achieve the sealed and leak-free discharge of the waste liquid.

[0038] As can be seen from the above structural description, this utility model, by setting up a negative pressure collector 8, can achieve closed-loop suction and collection of waste liquid, avoiding the volatilization and diffusion of odors and harmful substances from the waste liquid, thus improving the treatment environment and effectively reducing the risk of nosocomial infection. In addition, by setting a compression spring 87 inside the reservoir 81, pressing the reservoir 81 will cause the compression spring 87 to compress synchronously and expel the internal gas. After sealing the sealing plug 85, a stable negative pressure can be maintained. Opening the flow regulator 7 can realize automatic suction of waste liquid, eliminating the need for manual emptying of waste liquid or special personnel to hold the tube, effectively reducing the workload of medical staff and greatly improving the convenience of clinical operation.

[0039] In some embodiments, the top cover is provided with an upwardly protruding upper mounting seat 82, and the bottom cover is provided with a downwardly protruding lower mounting seat 83; the two ends of the compression spring 87 are respectively positioned and inserted into the upper mounting seat 82 and the lower mounting seat 83 to achieve accurate positioning and reliable fixation, effectively preventing the compression spring 87 from shifting during compression and reset, and ensuring stable and reliable negative pressure suction.

[0040] In some embodiments, the capacity of the negative pressure collector 8 can be set to 1000mL to 5000mL according to actual clinical needs, which can meet the collection needs of CRRT treatment waste liquid of different durations and doses, making it more applicable and more practical.

[0041] In some embodiments, since the lower mounting base 83 of the bottom cover protrudes downward, it is easy for the bottom of the negative pressure collector 8 to be uneven and unstable. Therefore, the present invention is also equipped with a bracket adapted to the negative pressure collector 8. The bracket includes an upper ring body 12 and a lower ring body 9 arranged at intervals. The upper ring body 12 and the lower ring body 9 are connected by a number of vertical rods 11, forming a placement space inside. The negative pressure collector 8 can be stably built into the placement space, thereby ensuring that the overall placement is stable and reliable.

[0042] It should be noted that the upper ring 12, the lower ring 9 and the vertical rod 11 can be fixedly connected by welding. The overall structure is firm and reliable, not easy to deform or loosen, and can provide stable support for the negative pressure collector 8.

[0043] In some embodiments, the lower ring body 9 is also connected to at least two cross braces 91. A positioning ring 92 is fixedly connected above the cross braces 91. The positioning ring 92 is coaxially arranged with the lower ring body 9. The lower mounting base 83 can be adapted to be inserted into the through hole of the positioning ring 92 to achieve accurate bottom positioning and further improve placement stability.

[0044] Considering that the negative pressure collector 8 is placed behind the support, directly pressing the reservoir 81 is prone to interference from the support and is inconvenient to operate. Therefore, this utility model is also equipped with a pressing tool. The pressing tool includes a pressing plate 13, which is movably sleeved on the outside of the upper mounting base 82. Its bottom is stably pressed against the surface of the top cover. Two handles 14 are symmetrically connected to the outer wall of the pressing plate 13, which makes it easy for medical staff to hold and apply force, so as to achieve convenient and labor-saving pressing operation.

[0045] Application results: By setting up a bracket that is compatible with the negative pressure collector 8, a stable support can be formed for it, which solves the problem of uneven bottom and difficulty in placement caused by the outward protrusion of the lower mounting base 83. It avoids tipping and displacement during aspiration, transportation and storage, improves the stability of the device, ensures the stable and orderly closed discharge of waste liquid, and meets the needs of clinical operation.

[0046] In some embodiments, a thickened ring 86 is provided around the top cover surface along the upper mounting base 82. The thickened ring 86 has high hardness and can effectively enhance local pressure bearing performance. The pressure plate 13 of the pressing tool presses on the upper surface of the thickened ring 86, which can not only achieve stable force application, but also prevent the top cover from deforming during the pressing process, ensuring smooth and reliable operation.

[0047] Considering that after the reservoir 81 is compressed to the preset position, a sealing plug 85 needs to be installed to maintain negative pressure, if one hand continuously holds the pressing position while the other hand operates the sealing plug 85, it is not only inconvenient to operate, but also prone to problems such as unstable pressing and negative pressure leakage. Therefore, this utility model provides a slot 111 on the vertical rod 11. When the handle 14 moves to the preset position with the pressing action, rotating the handle 14 will make it engage with the slot 111, thereby stably keeping the reservoir 81 in the compressed state.

[0048] In some embodiments, such as Figure 5 or Figure 6 As shown, the slot 111 can be formed by directly cutting the vertical rod 11; as Figure 9 As shown, the slot 111 can also be formed by bending the vertical rod 11; as Figure 10 As shown, the slot 111 can also be formed by welding two column heads to the outer wall of the vertical rod 11. Multiple forming methods can meet different processing and usage requirements.

[0049] As can be seen, by setting a pressing tool and a slot 111 on the vertical rod 11, the liquid storage bladder 81 can be operated with effort by using the pressing tool; after pressing, the handle 14 is inserted into the slot 111, which can stably maintain negative pressure and prevent negative pressure loss, while also making it easier for the staff to free their hands to close the sealing plug 85, thus improving the convenience and continuity of operation.

[0050] When negative pressure suction is needed, simply unscrew the handle 14 from the slot 111, which is very convenient. In addition, the pressing tool and the negative pressure collector 8 adopt a detachable independent design, and the same pressing tool can be used repeatedly, further reducing the cost of use and improving practicality.

[0051] In some embodiments, a number of legs 10 are fixedly welded to the bottom of the lower ring body 9 along the circumferential direction.

[0052] like Figure 8 As shown, in some embodiments, a vent valve 801 may also be provided at the bottom of the negative pressure collector 8.

[0053] The device is used as follows: S1 Connection and Fixing: Connect the waste liquid bag 1 drain pipe 2 to the extension pipe 5, and seal the end of the extension pipe 5 with the drainage pipe 6 of the negative pressure collector 8; place the negative pressure collector 8 into the bracket, and put the pressing tool on the outside of the mounting base 82 on the negative pressure collector 8 so that the pressure plate 13 fits and presses against the thickened ring 86.

[0054] S2 Establish negative pressure: Remove the sealing plug 85 from the exhaust port 84, hold the handle 14 of the pressing tool and press down on the reservoir 81. After compressing to the preset position, rotate the handle 14 to engage the slot 111, and then seal the exhaust port 84 with the sealing plug 85.

[0055] S3 Absorption and Collection: Unscrew handle 14 to disengage it from slot 111, open drain valve 4 of waste liquid bag 1, adjust flow regulator 7 on drainage tube 6, and the storage bladder 81 will automatically reset via spring 87. During the reset process, negative pressure is formed to automatically absorb and collect waste liquid. The suction speed can be flexibly adjusted by flow regulator 7.

[0056] S4 Stop suction: When the waste liquid is full or suction is complete, first close the flow regulator 7 of the drainage tube 6, and then close the drain valve 4 of the waste liquid bag 1.

[0057] In summary, this device is a closed-loop waste liquid discharge device specifically designed for CRRT. It uses negative pressure to automatically draw in waste liquid, and the accompanying support and pressing tools make operation more convenient. It has the advantages of being sealed to prevent volatilization and reducing the workload of medical staff.

[0058] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.

Claims

1. A closed-loop blood purification waste liquid discharge device, comprising a waste liquid bag (1), wherein the upper end of the waste liquid bag (1) is provided with an inlet pipe (3) with an inlet valve, and the lower end is provided with a drain pipe (2) with a drain valve (4), wherein an extension pipe (5) is detachably connected to the end of the drain pipe (2), characterized in that, It also includes a negative pressure collector (8); The negative pressure collector (8) includes a flexible compressible liquid storage bladder (81), with a top cover and a bottom cover connected to the top and bottom of the liquid storage bladder (81) respectively, forming a storage cavity; the top cover is provided with an upwardly protruding upper mounting seat (82), the upper mounting seat (82) is connected to a drainage tube (6) and an exhaust port (84), the drainage tube (6) is provided with a flow regulator (7), the drainage tube (6) is detachably connected to the extension tube (5), and the exhaust port (84) is fitted with a detachable sealing plug (85). The liquid storage bladder (81) is provided with a compression spring (87) inside, and the two ends of the compression spring (87) are respectively connected to the inner walls of the top cover and the bottom cover; When the reservoir (81) is pressed to compress it, the gas in the storage cavity is discharged through the exhaust port (84). After being compressed to the preset position, the exhaust port (84) is sealed by the sealing plug (85) to maintain the negative pressure in the storage cavity. Open the flow regulator (7) and use the negative pressure to draw the waste liquid in the waste liquid bag (1).

2. The closed-loop blood purification wastewater discharge device according to claim 1, characterized in that, The bottom cover is provided with a downwardly protruding lower mounting seat (83); the two ends of the compression spring (87) are respectively positioned and inserted into the upper mounting seat (82) and the lower mounting seat (83).

3. The closed-loop blood purification wastewater discharge device according to claim 2, characterized in that, The top cover surface is provided with a thickened ring (86) around the upper mounting base (82).

4. The closed-loop blood purification wastewater discharge device according to claim 1, characterized in that, The drainage tube (6) is made of medical-grade PVC or latex tubing.

5. A closed-loop blood purification wastewater discharge device according to claim 1, characterized in that, The capacity of the negative pressure collector (8) is set to 1000mL-5000mL.

6. A closed-loop blood purification wastewater discharge device according to claim 3, characterized in that, It also includes a bracket adapted to the negative pressure collector (8), the bracket including an upper ring (12) and a lower ring (9) spaced apart, the upper ring (12) and the lower ring (9) being connected by several vertical rods (11) to form a placement space inside; the negative pressure collector (8) is built into the placement space inside the bracket.

7. A closed-loop blood purification wastewater discharge device according to claim 6, characterized in that, The lower ring body (9) is also connected to at least two cross braces (91). A positioning ring (92) is fixedly connected above the cross braces (91). The positioning ring (92) is coaxially arranged with the lower ring body (9). The lower mounting base (83) can be adapted to be inserted into the through hole of the positioning ring (92).

8. A closed-loop blood purification wastewater discharge device according to claim 6 or 7, characterized in that, It also includes a pressing tool, which includes a pressing plate (13), the pressing plate (13) being movably fitted on the outside of the upper mounting base (82), the bottom of the pressing plate (13) pressing against the surface of the thickened ring layer (86); the outer wall of the pressing plate (13) is connected to two symmetrically arranged handles (14).

9. A closed-loop blood purification wastewater discharge device according to claim 8, characterized in that, The vertical rod (11) is provided with a slot (111). When the handle (14) moves to the preset position, the handle (14) can be engaged with the slot (111) by rotating the handle (14).

10. A closed-loop blood purification wastewater discharge device according to claim 9, characterized in that, The slot (111) is formed by cutting or bending the vertical rod (11).

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