Waste liquid collecting device for blood purification

Abstract

The utility model provides a waste liquid collecting device for blood purification, which comprises a waste liquid bag and a hook hung on a waste liquid scale, a connecting pipe is arranged at the top of the waste liquid bag, a liquid discharge pipe is arranged at the bottom of the waste liquid bag, and a liquid discharge valve is arranged on the liquid discharge pipe; the auxiliary bag is hung on the other hook of the waste liquid scale, and a butt joint pipe is arranged at the bottom of the auxiliary bag; the connecting assembly comprises a three-way pipe, an infusion strap and an on-off valve, the three-way pipe comprises a first connecting port, a second connecting port and a third connecting port, the first connecting port is in butt joint with the waste liquid channel, the second connecting port is in butt joint with the connecting pipe, the third connecting port is in butt joint with one end of the infusion strap, and the other end of the infusion strap is in butt joint with the butt joint pipe; and the on-off valve is used for controlling the on-off between the first connecting port and the second connecting port and the on-off between the first connecting port and the third connecting port. According to the technical scheme, the replacement frequency of the waste liquid bag is reduced, the infection risk of a patient due to frequent replacement of the waste liquid bag is reduced, the stalling time of the blood filter is shortened, and the blood coagulation risk of the filter is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of blood purification, and in particular to a waste liquid collection device for blood purification. Background Technology

[0002] Patients with kidney failure need to use a hemofiltration machine for blood purification. Dialysis refers to the process by which the solutions on both sides of a semipermeable membrane undergo diffusion, osmosis, and ultrafiltration, that is, the solute flows from the side with higher concentration to the side with lower concentration, while water molecules flow from the side with lower osmotic pressure to the side with higher osmotic pressure, eventually reaching a dynamic equilibrium.

[0003] The hemofiltration machine is equipped with a pre-replacement fluid bag, a post-replacement fluid bag, a dialysate bag, and a waste fluid bag. The hemofiltration machine exchanges substances with the patient's blood through replacement fluid and dialysate, and removes metabolic waste products from the patient through the waste fluid channel into the waste fluid bag. The hemofiltration machine also has pre-replacement fluid scales, post-replacement fluid scales, dialysate scales, and waste fluid scales. The pre-replacement fluid bag is hung on the hook of the pre-replacement fluid scale, the post-replacement fluid scale on the hook of the post-replacement fluid scale, the dialysate bag on the hook of the dialysate scale, and the waste fluid bag on the hook of the waste fluid scale. Each scale has three hooks. The liquid in the corresponding bag is weighed using the corresponding scale to determine the weight change of the liquid in each bag. Pre-replacement means the replacement fluid is injected into the blood before the dialyzer, and post-replacement means the replacement fluid is injected into the blood after the dialyzer. Since the pre-replacement fluid bag and the post-replacement fluid bag have the same structure, they will be collectively referred to as replacement fluid bags below.

[0004] In traditional hemodialysis machines, the filter is only equipped with one waste fluid bag, which can discharge 5000ml of waste fluid. When the waste fluid bag is full, the waste fluid in the waste fluid bag needs to be drained before the hemodialysis machine can continue to be used. This results in a long downtime for the hemodialysis machine, which can easily increase the risk of blood clotting in the filter, increase the medical costs for patients, and the frequent replacement of waste fluid bags can also increase the risk of infection for patients. Utility Model Content

[0005] One objective of this invention is to provide a waste fluid collection device for blood purification, which reduces the frequency of waste fluid bag replacement, lowers the risk of infection for patients due to frequent waste fluid bag replacement, shortens the downtime of the blood filtration machine, reduces the risk of filter clotting, and reduces the medical costs for patients.

[0006] The waste liquid collection device for blood purification provided in this application adopts the following technical solution:

[0007] The waste liquid collection device for blood purification according to this embodiment of the utility model includes:

[0008] A waste liquid bag is hung on a hook of a waste liquid scale. A connecting pipe is provided at the top of the waste liquid bag and a drain pipe is provided at the bottom of the waste liquid bag. Both the connecting pipe and the drain pipe are connected to the inside of the waste liquid bag. A drain valve is provided on the drain pipe.

[0009] An auxiliary bag is hung on another hook of the waste liquid scale. The bottom of the auxiliary bag is provided with a connecting pipe, which communicates with the inside of the auxiliary bag.

[0010] The connecting assembly includes a three-way tube, an infusion tubing, and a shut-off valve. The three-way tube includes a first connection port, a second connection port, and a third connection port. The first connection port is connected to the waste liquid channel via a first connector. The second connection port is connected to the end of the connecting tube furthest from the waste liquid bag via a second connector. The third connection port is connected to one end of the infusion tubing via a third connector. The other end of the infusion tubing is connected to a connecting pipe via a plug connector. The shut-off valve is located on the three-way tube and is used to control the opening and closing of the connection between the first and second connection ports, and between the first and third connection ports.

[0011] Preferably, the auxiliary bag is an empty replacement fluid bag.

[0012] Preferably, the second connection port and the third connection port are located on a straight line.

[0013] Preferably, the on / off valve includes a valve stem and a handwheel. The top surface of the three-way pipe has a receiving groove for the valve stem to pass through. The handwheel is coaxially connected to the top of the valve stem. A through hole is provided on the peripheral side wall of the valve stem. The valve stem is rotatably mounted on the three-way pipe. When the on / off valve is rotated, the through hole has a first position, a second position, and a third position.

[0014] When the through hole is in the first position, the through hole connects the first connection port and the second connection port. At this time, the third connection port is not connected to either the first connection port or the second connection port.

[0015] When the through hole is in the second position, the through hole connects the first connection port and the third connection port. At this time, the second connection port is not connected to either the first connection port or the third connection port.

[0016] When the through hole is in the third position, the through hole connects the first connection port, the second connection port, and the third connection port.

[0017] Preferably, the first connecting joint includes a first connecting part and a second connecting part, the first connecting part being threadedly connected to the outer peripheral wall of the first connecting port, and the second connecting part being fixedly connected to the waste liquid channel.

[0018] Preferably, the second connecting joint includes a first fixing part and a second fixing part. The first fixing part is fixedly connected to the second connecting port, and the connecting tube is inserted into the second fixing part and threadedly connected to the inner peripheral wall of the second fixing part.

[0019] Preferably, the connecting joint three includes a first docking part and a second docking part. The first docking part is threadedly connected to the outer peripheral wall of the connecting port three, and the second docking part is fixedly connected to the end of the infusion strip away from the auxiliary bag.

[0020] Preferably, the connector is a pin, the end of the pin near the auxiliary bag is conical, the pin has a flow hole for liquid to pass through, the conical end of the pin is inserted into the connecting tube and is press-fitted with the connecting tube, and the end of the infusion strip near the auxiliary bag is sleeved on the other end of the pin and is press-fitted with the pin.

[0021] Preferably, a receiving wheel is provided on the side wall of the blood filtration machine. The receiving wheel includes a central roller, a first fixing plate, and a second fixing plate. The first fixing plate and the second fixing plate are respectively connected to both ends of the central roller. The first fixing plate is also fixedly connected to one end of the central roller and the outer side wall of the blood filtration machine. The second fixing plate is detachably connected to the central roller. The diameters of the first fixing plate and the second fixing plate are both larger than the diameter of the central roller. The infusion strip is wound around the central roller.

[0022] Preferably, a mounting hole is provided on the end face of the central roller away from the blood filtration machine, and a mounting rod is coaxially connected to the end face of the fixing plate second near the central roller. The mounting rod passes through the mounting hole and is threadedly connected to the inner wall of the mounting hole.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] According to the waste fluid collection device for blood purification according to the present invention, by adopting the above-mentioned technical solution, the empty replacement fluid bag and the waste fluid bag are connected in series through a three-way pipe, so that the dischargeable waste fluid volume is increased to 9000ml. When both the waste fluid bag and the auxiliary bag are full, the blood filtration machine is stopped, and then the waste fluid bag and the auxiliary bag are removed. The auxiliary bag does not need to be discharged, and a new auxiliary bag is directly replaced. The on-off valve is rotated to close the connection between connection port one and connection port two, and connect connection port one and connection port three. Then the machine is turned on to continue blood purification, and then the waste fluid bag is discharged. After the waste fluid is discharged, the waste fluid bag is reconnected to the three-way pipe. This reduces the frequency of waste fluid bag replacement, reduces the risk of infection to patients caused by frequent waste fluid bag replacement, and eliminates the need to wait for waste fluid discharge, shortening the downtime of the blood filtration machine, thereby reducing the risk of filter clotting and reducing the medical costs for patients.

[0025] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0027] Figure 1 This is a schematic diagram of the overall structure of a waste liquid collection device for blood purification in an embodiment of this application.

[0028] Figure 2 This is an exploded structural diagram used to illustrate the connecting components in an embodiment of this application.

[0029] Figure 3 This is a cross-sectional structural diagram used to illustrate the plug-in connector in the embodiments of this application.

[0030] Figure 4 This is a structural schematic diagram used to illustrate the mounting rod in the embodiments of this application.

[0031] Figure label:

[0032] 1. Blood filtration machine; 11. Waste liquid scale; 12. Waste liquid channel; 2. Waste liquid bag; 21. Connecting pipe; 22. Drain pipe; 221. Drain valve; 3. Auxiliary bag; 31. Connecting pipe; 4. Connecting assembly; 41. T-connector; 411. Connecting port one; 412. Connecting port two; 413. Connecting port three; 414. Receiving tank; 42. Infusion strap; 43. On / off valve; 431. Valve stem; 4311. Through hole; 432. Handwheel; 5. Connecting joint one; 51. Connecting part one; 52. Connecting part two; 6. Connecting joint two; 61. Fixing part one; 62. Fixing part two; 7. Connecting joint three; 71. Butt joint one; 72. Butt joint two; 8. Insertion connector; 9. Receiving wheel; 91. Center roller; 911. Mounting hole; 92. Fixing plate one; 93. Fixing plate two; 931. Mounting rod. Detailed Implementation

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0034] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0038] In the specification and claims of this utility model, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] The waste liquid collection device for blood purification according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] Reference Figure 1-4The waste liquid collection device for blood purification includes a waste liquid bag 2, an auxiliary bag 3, and a connecting component 4. The waste liquid bag 2 is hung on a hook of the waste liquid scale 11. A connecting pipe 21 is provided at the top of the waste liquid bag 2, and a drain pipe 22 is provided at the bottom of the waste liquid bag 2. Both the connecting pipe 21 and the drain pipe 22 are connected to the inside of the waste liquid bag 2. A drain valve 221 is provided on the drain pipe 22. Opening the drain valve 221 can discharge the waste liquid in the waste liquid bag 2.

[0043] The auxiliary bag 3 is hung on another hook of the waste liquid scale 11. The bottom of the auxiliary bag 3 is provided with two connecting pipes 31, both of which are connected to the inside of the auxiliary bag 3.

[0044] Auxiliary bag 3 is an empty replacement fluid bag. The empty replacement fluid bag is used for waste utilization, increasing the amount of waste liquid that can be discharged to 9000ml without increasing costs.

[0045] The connecting component 4 includes a three-way tube 41, an infusion strip 42, and a shut-off valve 43. The three-way tube 41 includes a first connection port 411, a second connection port 412, and a third connection port 413. The second connection port 412 and the third connection port 413 are located on a straight line.

[0046] Connection port 411 is connected to waste liquid channel 12 via connection connector 5. Connection connector 5 includes connection part 51 and connection part 52. Connection part 51 is threaded to the outer peripheral wall of connection port 411, and connection part 52 is fixedly connected to waste liquid channel 12.

[0047] When installing the tee pipe 41, simply connect the connecting part 51 of the connector 5 to the outer peripheral wall of the connector port 411 using threads. The operation is convenient.

[0048] The second connection port 412 and the end of the connecting tube 21 away from the waste liquid bag 2 are connected to the second connection joint 6. The second connection joint 6 includes a first fixing part 61 and a second fixing part 62. The first fixing part 61 is fixedly connected to the second connection port 62. The connecting tube 21 is inserted into the second fixing part 62 and threadedly connected to the inner peripheral wall of the second fixing part 62.

[0049] When installing the waste liquid bag 2, simply insert the connecting tube 21 into the fixing part 2 62 and connect it with the fixing part 2 62 by thread. The operation is convenient.

[0050] The connection port 3 413 is connected to one end of the infusion strip 42 via the connection connector 3 7. The connection connector 3 7 includes a first docking part 71 and a second docking part 72. The first docking part 71 is threaded to the outer peripheral wall of the connection port 3 413, and the second docking part 72 is fixedly connected to the end of the infusion strip 42 away from the auxiliary bag 3.

[0051] The other end of the infusion strip 42 is connected to one of the connecting pipes 31 via a plug connector 8. The plug connector 8 is a needle. The end of the needle near the auxiliary bag 3 is cone-shaped and has a flow hole for liquid to pass through. The cone end of the needle is inserted into one of the connecting pipes 31 and is press-fitted with the connecting pipe 31. The end of the infusion strip 42 near the auxiliary bag 3 is fitted onto the other end of the needle and is press-fitted with the needle. The other connecting pipe 31 is sealed by a sealing plug.

[0052] When connecting the auxiliary bag 3 in series, tighten one end of the infusion strip 42 onto the needle and insert the needle into the connecting tube 31. The needle and the connecting tube 31 are press-fitted. Then, thread the other end of the infusion strip 42 through the mating part 71 of the connecting connector 3 to the connection port 413 of the three-way tube 41 to complete the installation of the auxiliary bag 3.

[0053] The on / off valve 43 is installed on the three-way pipe 41. The on / off valve 43 is used to control the opening and closing between connection port 1 411 and connection port 2 412, and between connection port 1 411 and connection port 3 413.

[0054] The on / off valve 43 includes a valve stem 431 and a handwheel 432. A receiving groove 414 for the valve stem 431 to pass through is provided on the top surface of the three-way pipe 41. The handwheel 432 is coaxially connected to the top end of the valve stem 431. A through hole 4311 is provided on the peripheral side wall of the valve stem 431. The valve stem 431 is rotatably mounted on the three-way pipe 41. When the on / off valve 43 is rotated, the through hole 4311 has a first position, a second position, and a third position.

[0055] When the through hole 4311 is in the first position, it connects connection port one 411 and connection port two 412. At this time, connection port three 413 is not connected to either connection port one 411 or connection port two 412. When the through hole 4311 is in the second position, it connects connection port one 411 and connection port three 413. At this time, connection port two 412 is not connected to either connection port one 411 or connection port three 413.

[0056] When the through hole 4311 is in the third position, the through hole 4311 connects the first connection port 411, the second connection port 412, and the third connection port 413.

[0057] The blood filtration machine 1 is provided with a receiving wheel 9 on its side wall. The receiving wheel 9 includes a central roller 91, a first fixing plate 92, and a second fixing plate 93. The first fixing plate 92 and the second fixing plate 93 are respectively connected to the two ends of the central roller 91. The first fixing plate 92 is also fixedly connected to one end of the central roller 91 and the outer side wall of the blood filtration machine 1. The second fixing plate 93 is detachably connected to the central roller 91. The diameters of the first fixing plate 92 and the second fixing plate 93 are both larger than the diameter of the central roller 91. The infusion strip 42 is wrapped around the central roller 91 to prevent the infusion strip 42 from being accidentally kicked and causing it to detach from the auxiliary bag 3.

[0058] A mounting hole 911 is provided on the end face of the central roller 91 away from the blood filtration machine 1. A mounting rod 931 is coaxially connected to the end face of the fixing plate 2 93 near the central roller 91. The mounting rod 931 passes through the mounting hole 911 and is threaded to the inner wall of the mounting hole 911. After the infusion strip 42 has been wrapped around the central roller 91 multiple times, the fixing plate 2 93 can be directly removed, and the multiple turns of the infusion strip 42 can be directly removed from the central roller 91 without having to remove it one turn at a time.

[0059] When it is necessary to increase the waste fluid discharge volume, connect the auxiliary bag 3 (empty replacement fluid bag) and the waste fluid bag 2 in series through the three-way pipe 41 to increase the discharge volume to 9000ml. When both the waste fluid bag 2 and the auxiliary bag 3 are full, stop the blood filtration machine 1, then remove the waste fluid bag 2 and the auxiliary bag 3. The auxiliary bag 3 does not need to be discharged; replace it with a new auxiliary bag 3 directly. Rotate the on-off valve 43 to close the connection between connection port 1 411 and connection port 2 412, and connect connection port 1 411 and connection port 3 413. Then turn on the machine to continue blood purification, and then discharge the waste fluid bag 2. After the discharge is complete, reconnect the waste fluid bag 2 to the three-way pipe 41. This reduces the frequency of replacing the waste fluid bag 2, reduces the risk of infection for patients due to frequent replacement of the waste fluid bag 2, and eliminates the need to wait for waste fluid discharge, shortening the downtime of the blood filtration machine 1, thereby reducing the risk of filter clotting and reducing the medical costs for patients.

[0060] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waste liquid collection device for blood purification, characterized in that, include: Waste liquid bag (2) is hung on the hook of waste liquid scale (11). A connecting pipe (21) is provided at the top of the waste liquid bag (2) and a drain pipe (22) is provided at the bottom of the waste liquid bag (2). The connecting pipe (21) and the drain pipe (22) are both connected to the inside of the waste liquid bag (2). A drain valve (221) is provided on the drain pipe (22). An auxiliary bag (3) is hung on another hook of the waste liquid scale (11). The bottom of the auxiliary bag (3) is provided with a connecting pipe (31), which is connected to the inside of the auxiliary bag (3). The connecting assembly (4) includes a three-way tube (41), an infusion strap (42), and a shut-off valve (43). The three-way tube (41) includes a first connection port (411), a second connection port (412), and a third connection port (413). The first connection port (411) is connected to the waste liquid channel (12) via a first connection connector (5). The second connection port (412) is connected to the end of the connecting tube (21) away from the waste liquid bag (2) via a second connection connector (6). The third connection port (413) is connected to one end of the infusion strip (42) via the third connection connector (7), and the other end of the infusion strip (42) is connected to the connecting pipe (31) via the plug connector (8); the on / off valve (43) is provided on the three-way pipe (41), and the on / off valve (43) is used to control the opening and closing between the first connection port (411) and the second connection port (412), and between the first connection port (411) and the third connection port (413).

2. The waste liquid collection device for blood purification according to claim 1, characterized in that: The auxiliary bag (3) is an empty replacement fluid bag.

3. The waste liquid collection device for blood purification according to claim 1, characterized in that: The second connection port (412) and the third connection port (413) are located on a straight line.

4. The waste liquid collection device for blood purification according to claim 1, characterized in that: The on / off valve (43) includes a valve stem (431) and a handwheel (432). A receiving groove (414) for the valve stem (431) to pass through is provided on the top surface of the three-way pipe (41). The handwheel (432) is coaxially connected to the top end of the valve stem (431). A through hole (4311) is provided on the peripheral side wall of the valve stem (431). The valve stem (431) is rotatably mounted on the three-way pipe (41). When the on / off valve (43) rotates, the through hole (4311) has a first position, a second position, and a third position. When the through hole (4311) is in the first position, the through hole (4311) connects the first connection port (411) and the second connection port (412). At this time, the third connection port (413) is not connected to either the first connection port (411) or the second connection port (412). When the through hole (4311) is in the second position, the through hole (4311) connects the first connection port (411) and the third connection port (413). At this time, the second connection port (412) is not connected to either the first connection port (411) or the third connection port (413). When the through hole (4311) is in the third position, the through hole (4311) connects the first connection port (411), the second connection port (412), and the third connection port (413).

5. The waste liquid collection device for blood purification according to claim 1, characterized in that: The first connecting joint (5) includes a first connecting part (51) and a second connecting part (52). The first connecting part (51) is threadedly connected to the outer peripheral wall of the first connecting port (411), and the second connecting part (52) is fixedly connected to the waste liquid channel (12).

6. The waste liquid collection device for blood purification according to claim 1, characterized in that: The second connecting joint (6) includes a first fixing part (61) and a second fixing part (62). The first fixing part (61) is fixedly connected to the second connecting port (412). The connecting tube (21) is inserted into the second fixing part (62) and threadedly connected to the inner circumferential wall of the second fixing part (62).

7. The waste liquid collection device for blood purification according to claim 1, characterized in that: The connecting joint three (7) includes a first docking part (71) and a second docking part (72). The first docking part (71) is threadedly connected to the outer peripheral wall of the connecting port three (413), and the second docking part (72) is fixedly connected to the end of the infusion strip (42) away from the auxiliary bag (3).

8. The waste liquid collection device for blood purification according to claim 1, characterized in that: The connector (8) is a pin. The end of the pin near the auxiliary bag (3) is cone-shaped. The pin has a flow hole for liquid to pass through. The cone end of the pin is inserted into the connecting tube (31) and is press-fitted with the connecting tube (31). The end of the infusion strip (42) near the auxiliary bag (3) is sleeved on the other end of the pin and is press-fitted with the pin.

9. The waste liquid collection device for blood purification according to claim 1, characterized in that: A receiving wheel (9) is provided on the side wall of the blood filtration machine (1). The receiving wheel (9) includes a central roller (91), a first fixing plate (92), and a second fixing plate (93). The first fixing plate (92) and the second fixing plate (93) are respectively connected to the two ends of the central roller (91). The first fixing plate (92) is also fixedly connected to one end of the central roller (91) and the outer side wall of the blood filtration machine (1). The second fixing plate (93) is detachably connected to the central roller (91). The diameters of the first fixing plate (92) and the second fixing plate (93) are both larger than the diameter of the central roller (91). The infusion strip (42) is wound around the central roller (91).

10. The waste liquid collection device for blood purification according to claim 9, characterized in that: The center roller (91) has an installation hole (911) on one end face away from the blood filter (1). The fixing plate (93) has an installation rod (931) coaxially connected to one end face near the center roller (91). The installation rod (931) passes through the installation hole (911) and is threaded to the inner wall of the installation hole (911).

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