Dialysis tubing testing device

Abstract

The application discloses a dialysis tube testing device, and belongs to the technical field of medical devices. The device comprises a simulator, a first pipeline, a second pipeline and a temporary blood storage dish. The simulator is provided with an installation groove for installing the dialysis tube. The first pipeline is communicated with a first channel of the dialysis tube. The second pipeline is communicated with a second channel of the dialysis tube. The first pipeline and the second pipeline are both communicated with the temporary blood storage dish. The dialysis testing device disclosed by the application has simple structure. The testing liquid is collected by the temporary blood storage dish and then reused. Therefore, the use amount of the testing liquid can be greatly reduced, and the overall volume of the testing device is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a dialysis tube testing device. Background Technology

[0002] A peritoneal dialysis catheter consists of a catheter, lead wire, and polyester sheath. The insertion end of the catheter has a side hole and is characterized by two arms at the insertion end, forming a Y-shape with a 40° angle between them. Peritoneal dialysis is an effective renal replacement therapy for end-stage renal disease, and the peritoneal dialysis catheter is the "lifeline" for peritoneal dialysis patients. Before leaving the factory, dialysis catheters typically undergo a lifespan test.

[0003] Existing testing equipment is complex in structure and requires a lot of resources. Summary of the Invention

[0004] This invention discloses a dialysis tube testing device to improve the above-mentioned problems.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] To achieve the above objectives, the present invention discloses a dialysis tube testing device, comprising:

[0007] A simulator, wherein the simulator is provided with a mounting slot for installing the dialysis tube;

[0008] The first conduit is connected to the first channel of the dialysis tube;

[0009] A second conduit, the second conduit being connected to the second channel of the dialysis bolus; and

[0010] A temporary blood storage dish, with both the first and second pipelines connected to the temporary blood storage dish.

[0011] Optionally, the system further includes a first flow meter, a second flow meter, and a controller. A first blood pump is installed in the first pipeline, and a second blood pump is installed in the second pipeline. The first flow meter is installed in the first channel, and the second flow meter is installed in the second channel. The first flow meter, the second flow meter, the first blood pump, and the second blood pump are all electrically connected to the controller. When the flow rate in the first channel or the second channel is less than a preset flow rate, the controller controls both the first blood pump and the second blood pump to stop working.

[0012] Optionally, it also includes a first pressure gauge and a second pressure gauge. The first pressure gauge is installed in the first channel, and the second pressure gauge is installed in the second channel. Both the first pressure gauge and the second pressure gauge are electrically connected to the controller. When the pressure in the first channel or the pressure in the second channel is greater than a preset pressure, the controller controls both the first and second blood pumps to stop working.

[0013] Optionally: The temporary blood storage dish includes a first cavity and a second cavity, the first cavity and the second cavity are connected, the first pipeline is connected to the first cavity, and the second pipeline is connected to the second cavity.

[0014] Optionally: The temporary blood storage dish is provided with a first float, a lever and a baffle. The baffle is rotatably connected to the temporary blood storage dish. Rotating the baffle can make the first cavity and the second cavity communicate or block each other. The lever is rotatably connected to the temporary blood storage dish. The first float is located in the first cavity and is connected to the first end of the lever. When the first float moves down, it drives the second end of the lever to rise and pushes the baffle to communicate the first cavity and the second cavity.

[0015] Optionally, the system further includes a spare blood storage dish, which is connected to the first cavity. A movable plug is provided between the spare blood storage dish and the temporary blood storage dish. The movable plug is connected to the first end of the lever. When the first end of the lever moves downward, it can drive the movable plug to move downward and connect the spare blood storage dish to the first cavity.

[0016] Optionally, the movable plug is arc-shaped, and the center of the movable plug is located on the rotation axis of the lever.

[0017] Optionally, it further includes a stop block, a second float block, an elastic element, and a connecting rope. The stop block, the second float block, the elastic element, and the connecting rope are all located in the second cavity. The stop block is slidably connected to the temporary blood storage dish. The two ends of the elastic element are respectively connected to the stop block and the temporary blood storage dish. The elastic element causes the stop block to tend to move toward the baffle. When the stop block moves toward the baffle, it can restrict the rotation of the baffle. The two ends of the connecting rope are respectively connected to the second float block and the stop block. When the second float block floats up, it can pull the stop block to move away from the baffle.

[0018] Optionally: The temporary blood storage dish is provided with a groove and a through hole, the groove and the second cavity are connected through the through hole, the stop block and the elastic element are both located in the groove, one end of the connecting rope is connected to the end of the stop block away from the baffle, and the other end of the connecting rope passes through the through hole and is connected to the second float.

[0019] Optionally, the chute is provided along the height direction of the temporary blood storage dish.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] The dialysis testing device disclosed in this invention has a simple structure and uses a temporary blood collection dish to collect the test liquid for reuse, which can greatly reduce the amount of test liquid used and thus reduce the overall size of the testing device. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the dialysis tube testing device disclosed in an embodiment of the present invention is shown;

[0024] Figure 2 This diagram shows a scenario where the first cavity and the second cavity disclosed in an embodiment of the present invention are closed.

[0025] Figure 3 This diagram shows a first cavity and a second cavity connected in an embodiment of the present invention.

[0026] Figure 4 This diagram illustrates the connection between the backup blood storage dish and the temporary blood storage dish as disclosed in an embodiment of the present invention.

[0027] Figure 5 A schematic diagram of the structure for controlling the baffle within the first cavity disclosed in an embodiment of the present invention is shown;

[0028] Figure 6 A schematic diagram of the structure for controlling the baffle within the second cavity disclosed in an embodiment of the present invention is shown.

[0029] In the picture:

[0030] 100-Simulator, 110-Installation slot, 200-First pipeline, 300-Second pipeline, 400-Temporary blood storage dish, 410-First cavity, 411-First float, 412-Lever, 413-Baffle, 414-Modible plug, 420-Second cavity, 421-Block, 422-Second float, 423-Connecting rope, 424-Slide groove; 425-Through hole, 430-Partition, 431-Opening, 500-Spare blood storage dish. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0032] Example:

[0033] See Figure 1 This invention discloses a dialysis tube testing device, comprising a simulator 100, a first conduit 200, a second conduit 300, and a temporary blood collection dish 400. The simulator 100 has a mounting slot 110 for mounting the dialysis tube. The first conduit 200 is connected to a first channel of the dialysis tube, and the second conduit 300 is connected to a second channel of the dialysis tube. Both the first and second conduits 200 are connected to the temporary blood collection dish 400. The test liquid within the simulator 100 has a specific flow rate, which is set to simulate the flow rate of human blood. The external test liquid first enters the dialysis tube through the first conduit 200, then flows along the dialysis tube into the simulator 100. The test liquid within the simulator 100 flows along the second channel of the dialysis tube into the second conduit 300, and then is sent to the temporary blood collection dish 400. The first conduit 200 can then directly draw test liquid from the temporary blood collection dish 400 to test the dialysis tube, thus forming a cycle.

[0034] The dialysis testing device disclosed in this embodiment has a simple structure, and uses a temporary blood collection dish 400 to collect the test liquid for reuse, which can greatly reduce the amount of test liquid used, thereby reducing the overall volume of the testing device.

[0035] In this embodiment, the dialysis tubing testing device further includes a first flow meter, a second flow meter, and a controller. A first blood pump is installed in the first tubing 200, and a second blood pump is installed in the second tubing 300. The first flow meter is installed in the first channel, and the second flow meter is installed in the second channel. The first flow meter, the second flow meter, the first blood pump, and the second blood pump are all electrically connected to the controller. When the flow rate in the first channel or the second channel is less than a preset flow rate, the controller controls both the first and second blood pumps to stop working. The controller records the time elapsed from the start to the stop of the first and second blood pumps, thereby calculating the service life of the dialysis tubing.

[0036] The dialysis tubing testing device also includes a first pressure gauge and a second pressure gauge. The first pressure gauge is installed in the first channel, and the second pressure gauge is installed in the second channel. Both pressure gauges are electrically connected to the controller. When the pressure in either the first or second channel exceeds a preset pressure, the controller stops both the first and second blood pumps. The controller records the time elapsed from the start to the stop of the first and second blood pumps, thereby calculating the lifespan of the dialysis tubing. This testing method, along with the methods described above, determines whether the dialysis tubing has been used to the point of being insufficient to meet the patient's needs by testing flow rate and pressure. Combining these two testing methods yields more accurate results.

[0037] See Figures 2 to 5 A partition 430 is provided in the middle of the temporary blood storage dish 400, which divides the internal space of the temporary blood storage dish 400 into a first cavity 410 and a second cavity 420. An opening 431 is provided on the partition 430 for communication between the first cavity 410 and the second cavity 420. A first pipe 200 is connected to the first cavity 410, and a second pipe 300 is connected to the second cavity 420. Initially, the simulated liquid is stored in the first cavity 410. Then, the simulated liquid flows into the simulator 100 along the first pipe 200. The simulated liquid in the simulator 100 then flows back to the second cavity 420 along the second pipe 300. The simulated liquid in the second cavity 420 can then enter the first cavity 410. The temporary blood storage dish 400 is divided into a first chamber 410 and a second chamber 420. The test liquid in the second chamber 420 can be allowed to settle for a certain period of time before entering the first chamber 410. This allows impurities in the test liquid to settle to a certain extent, thereby reducing the impact on the test results caused by the recycling of the test liquid.

[0038] See Figure 5The temporary blood storage dish 400 is equipped with a first float 411, a lever 412, and a baffle 413. The baffle 413 is installed at the opening 431 of the partition 430 and is rotatably connected to the partition 430. Rotating the baffle 413 opens or closes the opening 431, thereby connecting or blocking the first cavity 410 and the second cavity 420. The lever 412 is rotatably connected to the temporary blood storage dish 400. The first float 411 is located inside the first cavity 410 and is connected to the first end of the lever 412. Initially, the simulated liquid is located in the first cavity 410, and the liquid level in the first cavity 410 is relatively high. At this time, the first float 411 drives the first end of the lever 412 to be in a higher position, while the second end of the lever 412 is in a lower position. At this time, the thrust of the lever 412 on the baffle 413 is very small or zero, and the baffle 413 can close the opening 431. When the liquid level in the first cavity 410 drops, the first float 411 drops as well. At this time, the first float 411 drives the first end of the lever 412 to drop, and causes the second end of the lever 412 to tilt up. When the second end of the lever 412 tilts up, it pushes the baffle 413 to rotate counterclockwise. At this time, the opening 431 is opened, and the simulated liquid in the second cavity 420 can flow into the first cavity 410.

[0039] The width of lever 412 is smaller than the width of baffle 413. A limiting block is provided at the opening 431 of partition 430. The limiting block is located on the side of opening 431 facing the first cavity 410, and is offset from lever 412. This prevents lever 412 from colliding with the limiting block when it swings up and down. The limiting block ensures that baffle 413 will not rotate towards the first cavity 410. That is, even when the liquid level in the first cavity 410 is high, causing the second end of lever 412 to rotate downwards at an excessive angle, and when the second end of lever 412 separates from baffle 413, baffle 413 will not rotate towards the first cavity 410.

[0040] During dialysis tube testing, the long testing time necessitates the use of a large amount of test fluid. This application employs a circulation method to reduce test fluid consumption, thereby lowering testing costs and preventing waste. Furthermore, during testing, the formation of clot-like substances can adhere to the dialysis tube, reducing the amount of test fluid in the circulation system and potentially causing test interruption. To avoid this interruption, this application adds a backup blood storage dish 500 above the temporary blood storage dish 400. When the test fluid level in the temporary blood storage dish 400 drops to a certain point, the backup blood storage dish 500 replenishes the temporary blood storage dish 400, ensuring the normal operation of the test.

[0041] See 2 to Figure 4The spare blood storage dish 500 is connected to the first cavity of the temporary blood storage dish 400. A liquid guide hole is provided between the spare blood storage dish 500 and the temporary blood storage dish 400, which allows the two to be connected. A movable plug 414 is also provided between the spare blood storage dish 500 and the temporary blood storage dish 400. The movable plug 414 is used to control the opening and closing of the liquid guide hole, thereby controlling whether the spare blood storage dish 500 and the temporary blood storage dish 400 are connected. The movable plug 414 is connected to the first end of the lever 412, and the movable plug 414 can move up and down with the first end of the lever 412. When the first end of the lever 412 moves down, the first end of the lever 412 drives the movable plug 414 to move down. After the movable plug 414 leaves the liquid guide hole, it can connect the spare blood storage dish 500 with the temporary blood storage dish 400. At this time, the test liquid in the spare blood storage dish 500 can flow into the first cavity 410. When the first end of the lever 412 moves up, the lever 412 can drive the movable plug 414 to move up and close the liquid guide hole.

[0042] See Figure 5 In this embodiment, the movable plug 414 is set in an arc shape, and the center of the movable plug 414 is located on the rotation axis of the lever 412. The up and down movement of the first end of the lever 412 is actually a rotation around its rotation axis. At this time, the arc-shaped movable plug 414 also rotates around the rotation axis of the lever 412, thereby realizing the control of the opening and closing of the liquid guide hole. The arc-shaped movable plug 414, which can rotate with the lever 412, can keep the liquid guide hole clear. At this time, when the test liquid in the spare blood storage dish 500 flows into the first cavity 410 along the liquid guide hole, the test liquid will not directly scour the first float 411, thereby avoiding the first float 411 from failing to float normally due to the scour of the test liquid, and thus avoiding the excessive amount of liquid in the first cavity 410.

[0043] The dialysis tube testing device disclosed in this embodiment works as follows:

[0044] Initially, test fluid is injected only into the first chamber 410. When the first and second blood pumps are working, the test fluid in the first chamber 410 flows into the simulator 100 through the first pipeline, while the original test fluid in the simulator 100 flows into the second chamber 420 through the second pipeline 300.

[0045] As the test proceeds, the liquid level in the first chamber 410 continuously decreases, while the liquid level in the second chamber 420 continuously increases. At this time, the first float 411 descends along with the decreasing liquid level in the first chamber 410. As the first float 411 descends, it causes the first end of the lever 412 to rotate downwards, while the second end of the lever 412 rotates upwards, pushing the baffle 413 to rotate counterclockwise. This causes the baffle 413 to open the opening 431, allowing the test liquid in the second chamber 420 to flow into the first chamber 410 through the opening 431.

[0046] During the testing of the dialysis tube, deposits may form on the inner wall of the tube, leading to a reduction in the overall test fluid volume and a further drop in the fluid level within the first chamber 410. As the first float 411 descends with the fluid level in the first chamber 410, the first end of the lever 412 rotates downwards. This causes the movable plug 414 to move away from the fluid guide hole, allowing test fluid from the spare blood collection dish 500 to be replenished into the first chamber 410 through this hole. Once the test fluid in the first chamber 410 has reached a certain level, the first float 411 rises and re-closes the fluid guide hole. By controlling the opening and closing of the fluid guide hole through changes in the fluid level within the first chamber 410, dynamic control of the fluid level within the first chamber 410 is achieved.

[0047] To prevent the baffle 413 from automatically rotating toward the second cavity 420 when there is no test liquid or the test liquid is insufficient, a stop block 421 can be provided in the second cavity 420. The stop block 421 is slidably connected to the temporary blood collection dish 400. When the stop block 421 rotates toward the baffle 413, the rotation of the baffle 413 can be restricted by the stop block 421. When the stop block 421 moves in a direction away from the baffle 413 and leaves the rotation range of the baffle 413, the baffle 413 can rotate toward the second cavity 420.

[0048] See Figures 2 to 4 as well as Figure 6The second cavity 420 also includes an elastic element for automatically controlling the position of the stop block 421, a connecting rope 423, and a second float 422. A groove and a through hole are provided on the temporary blood storage dish 400, with the groove connecting the second cavity 420 via the through hole. The stop block 421 and the elastic element are both located within the groove. The stop block 421 is slidably connected to the temporary blood storage dish 400, and both ends of the elastic element are connected to the stop block 421 and the temporary blood storage dish 400 respectively, causing the stop block 421 to tend to move towards the baffle 413. When the stop block 421 moves towards the baffle 413, it restricts the rotation of the baffle 413. The second float 422 is located within the second cavity 420 and outside the groove. One end of the connecting rope 423 is connected to the end of the stop block 421 facing away from the baffle 413, and the other end of the connecting rope 423 passes through the through hole and connects to the second float 422. When the second float 422 floats up, it can pull the stop 421 to move away from the baffle 413.

[0049] In this embodiment, the chute is set along the height direction of the temporary blood storage dish 400, which makes it more convenient to control the position of the stop block 421 through the second float block 422.

[0050] In this embodiment, the stop block 421 and the baffle plate 413 cooperate with each other as follows:

[0051] See Figure 2 and Figure 6 Initially, the stop block 421 moves toward the baffle 413 under the elastic force of the elastic element, restricting the baffle 413 from rotating toward the second cavity 420. When there is no test liquid or a small amount of test liquid in the second cavity 420, the float 422 floats at a low height. At this time, the float cannot pull the stop block 421 down via the connecting rope 423, meaning that the stop block 421 will continue to restrict the rotation of the baffle 413.

[0052] See Figure 3 As the amount of test liquid in the second chamber 420 increases, the liquid level in the second chamber 420 gradually rises. When the second float 422 floats up, it will gradually pull the stop 421 to move away from the baffle 413 until the stop 421 completely leaves the rotation range of the baffle 413. At this time, the baffle 413 can rotate towards the second chamber 420 under the pushing force of the lever 412, thereby connecting the second chamber 420 with the first chamber 410, so that the test liquid in the second chamber 420 can enter the first chamber 410.

[0053] Because of the restriction of the baffle 413 by the baffle 421, the second chamber 420 is connected to the first chamber 410 only after the liquid level in the second chamber 420 reaches a certain height. This ensures that when there is little test liquid in the first chamber 410 and little liquid in the second chamber 420, the spare blood collection dish 500 can deliver more test liquid to the first chamber 410, thereby ensuring that the testing of the dialysis tube can be carried out uninterruptedly and that there is sufficient test liquid during the testing.

[0054] In this embodiment, the test liquid can be blood (animal blood) or a self-made liquid with components similar to blood.

[0055] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dialysis tube testing device, characterized in that, include: A simulator, wherein the simulator is provided with a mounting slot for installing the dialysis tube; The first conduit is connected to the first channel of the dialysis tube; The second conduit is connected to the second channel of the dialysis tube; as well as A temporary blood storage dish, wherein both the first and second pipelines are connected to the temporary blood storage dish; It also includes a first flow meter, a second flow meter, and a controller. A first blood pump is installed in the first pipeline, and a second blood pump is installed in the second pipeline. The first flow meter is installed in the first channel, and the second flow meter is installed in the second channel. The first flow meter, the second flow meter, the first blood pump, and the second blood pump are all electrically connected to the controller. When the flow rate in the first channel or the second channel is less than a preset flow rate, the controller controls the first blood pump and the second blood pump to stop working. It also includes a first pressure gauge and a second pressure gauge. The first pressure gauge is installed in the first channel, and the second pressure gauge is installed in the second channel. Both the first pressure gauge and the second pressure gauge are electrically connected to the controller. When the pressure in the first channel or the pressure in the second channel is greater than the preset pressure, the controller controls both the first blood pump and the second blood pump to stop working. The temporary blood storage dish includes a first cavity and a second cavity, the first cavity and the second cavity are connected, the first pipeline is connected to the first cavity, and the second pipeline is connected to the second cavity; The temporary blood storage dish is equipped with a first float, a lever, and a baffle. The baffle is rotatably connected to the temporary blood storage dish. Rotating the baffle can connect or block the first cavity and the second cavity. The lever is rotatably connected to the temporary blood storage dish. The first float is located in the first cavity and is connected to the first end of the lever. When the first float moves down, it causes the second end of the lever to rise and pushes the baffle to connect the first cavity and the second cavity. It also includes a spare blood storage dish, which is connected to the first cavity. A movable plug is provided between the spare blood storage dish and the temporary blood storage dish. The movable plug is connected to the first end of the lever. When the first end of the lever moves downward, it can drive the movable plug to move downward and make the spare blood storage dish connected to the first cavity. The movable plug is arc-shaped, and the center of the movable plug is located on the rotation axis of the lever; It also includes a stop block, a second float block, an elastic element, and a connecting rope. The stop block, the second float block, the elastic element, and the connecting rope are all located in the second cavity. The stop block is slidably connected to the temporary blood storage dish. The two ends of the elastic element are respectively connected to the stop block and the temporary blood storage dish. The elastic element causes the stop block to tend to move towards the baffle. When the stop block moves towards the baffle, it can restrict the rotation of the baffle. The two ends of the connecting rope are respectively connected to the second float block and the stop block. When the second float block floats up, it can pull the stop block to move in a direction away from the baffle.

2. The dialysis tube testing device according to claim 1, characterized in that, The temporary blood storage dish is provided with a groove and a through hole. The groove and the second cavity are connected through the through hole. The stop block and the elastic element are both located in the groove. One end of the connecting rope is connected to the end of the stop block away from the baffle. The other end of the connecting rope passes through the through hole and is connected to the second float.

3. The dialysis tube testing device according to claim 2, characterized in that, The chute is positioned along the height of the temporary blood storage dish.

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