A hemodialysis line coagulation detector

Abstract

The application provides a hemodialysis pipeline coagulation detector and belongs to the technical field of coagulation detection. The hemodialysis pipeline coagulation detector comprises a fixing frame, a pipeline storage area is formed in the middle of the fixing frame, a through opening is formed in one end of the fixing frame, an infrared detection area is arranged at the other end of the fixing frame, an infrared sensor is arranged in the infrared detection area, clamping grooves are formed outside the infrared detection area, a display device and an alarm are fixedly connected to the outside of the fixing frame, and an outer handle is fixedly connected to the outside of the fixing frame. The light shielding assembly is arranged, so that the hemodialysis pipeline coagulation detector can clamp and limit the hemodialysis pipeline located in the detection area. On the one hand, the position of the hemodialysis pipeline is fixed, and on the other hand, the hemodialysis pipeline is shaded, the infrared sensor is prevented from being disturbed by other external light, and the detection accuracy and effect are improved.

Description

Technical Field

[0001] This invention relates to the field of coagulation detection technology, and in particular to a coagulation detector for hemodialysis tubing. Background Technology

[0002] During hemodialysis, clotting of the dialysis tubing is a common problem that can affect dialysis efficiency and increase dialysis costs. Clotting is related to a variety of factors, including reduced blood flow rate, biocompatibility between blood and synthetic extracorporeal tubing, shear-triggered release of tissue factor, activation of leukocytes and platelets, and the patient's own hypercoagulable state. Other causes of clotting in the dialyzer and tubing include insufficient anticoagulant dosage, low blood flow, hypercoagulable constitution, consumption of high-fat foods, and low blood pressure. If severe clotting occurs, it may be necessary to replace the tubing or terminate dialysis.

[0003] For example, Chinese patent CN109939284A discloses a handheld hemodialysis machine and a tubing coagulation detector. This patent states that existing technologies, in practical use, can only detect the presence of coagulation in the dialyzer, but cannot visualize the specific coagulation status of the blood in the tubing. This is inconvenient for medical personnel to understand the coagulation status. Based on this, the patent proposes a handheld hemodialysis machine and tubing coagulation detector that uses an infrared sensor to collect data on the condition within the corresponding tubing and displays this data on a screen, facilitating analysis of the specific coagulation status by medical personnel. However, infrared sensors are susceptible to interference from other light sources in the environment, leading to inaccurate data collection and affecting the device's detection performance. Therefore, this application provides a hemodialysis tubing coagulation detector to meet this need. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a coagulation detector for hemodialysis tubing to solve the problem that the detection effect of existing detectors is poor due to interference from external light when using infrared sensors.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A coagulation detector for hemodialysis tubing includes a mounting frame, a tubing storage area in the middle of the mounting frame, a through opening at one end of the mounting frame, and an infrared detection area at the other end of the mounting frame. An infrared sensor is mounted in the infrared detection area, and a clamping groove is provided on the outside of the infrared detection area. A display device and an alarm are fixedly connected to the outside of the mounting frame, and an external handle is fixedly connected to the outside of the mounting frame. A movable plate is fitted inside the mounting frame. A light-shielding component is used to shield the detection position of the hemodialysis tubing, and the light-shielding component is connected to the infrared detection area. A fixing component is used to fix the light-shielding component, and the fixing component is connected to the movable plate. A limiting component is used to fix the relative position between the movable plate and the mounting frame, and the limiting component is connected to the movable plate.

[0007] Optionally, the light-shielding assembly includes a first movable cavity formed in the infrared detection area, an arc-shaped cover movably connected to the first movable cavity via a first rotating rod, a clamping groove formed on the side of the infrared detection area facing the pipeline storage area, the middle position of the arc-shaped cover corresponding to the position of the clamping groove, and a uniformly distributed positioning piece fixedly connected to the inner side of the arc-shaped cover.

[0008] Optionally, the shape of the positioning piece is adapted to the shape of the clamping groove, and a third guide surface is provided on the outer side of the positioning piece. A first weakening groove and a third weakening groove are provided on the outer side of the arc-shaped cover, and the first weakening groove corresponds to the middle position between the positioning piece and the first weakening groove.

[0009] Optionally, the fixing component includes a plug connector fixedly connected to one end of the movable plate extending into the pipeline storage area. The plug connector has a second weakening groove and a second movable cavity on its inner side. The plug connector and the arc-shaped cover are movably connected by a second rotating rod. One end of the arc-shaped cover that is fitted with the second rotating rod is located inside the second movable cavity.

[0010] Optionally, the arc-shaped cover is arc-shaped, and the thickness of the arc-shaped cover at the end near the first rotating rod is greater than the thickness of the arc-shaped cover at the end near the second rotating rod. The arc-shaped cover is made of light-blocking plastic sheet.

[0011] Optionally, the infrared detection area has a plug slot corresponding to the position of the movable plate. The plug slot has evenly distributed toothed grooves, and the width of the plug slot is greater than the sum of the thickness of the plug and the toothed rack. The plug is externally fixedly connected to a toothed rack that matches the shape of the toothed grooves, and the end of the plug is provided with a first guide surface.

[0012] Optionally, the limiting component includes a limiting plate fixedly connected to the outside of the movable plate. The limiting plate is located on the side of the movable plate away from the display device and is located inside the through opening. A uniformly distributed spring is fixedly connected between the limiting plate and the inner wall of the through opening.

[0013] Optionally, the fixed frame has an opening that matches the shape of the movable plate. The movable plate passes through the opening, and one end of the movable plate away from the connector extends to the inside of the outer grip and is fixedly connected to the inner grip. Both the inner grip and the outer grip have slots that match the shape of the fingers. The movable plate has evenly distributed lightweight openings.

[0014] Optionally, the end of the limiting plate is fixedly connected with a first limiting head and a second limiting head, and a limiting strip is provided on the inner sidewall of the through opening. The ends of the first limiting head and the second limiting head away from the limiting plate are provided with arc surfaces that are adapted to the shape of the limiting strip, and a gap is provided between the first limiting head and the second limiting head.

[0015] Optionally, a fourth weakening groove is provided at the connection between the first limiting head and the second limiting head and the limiting plate, and a second guide surface is provided on the side of the second limiting head away from the first limiting head.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above solution, by setting up a light-shielding component, the coagulation detector of the hemodialysis tubing can clamp and limit the hemodialysis tubing located in the detection area. On the one hand, it keeps the position of the hemodialysis tubing fixed, and on the other hand, it shields it from light, eliminating interference from other external light for the infrared sensor, thereby improving detection accuracy and effectiveness.

[0018] By incorporating positioning plates within the light-shielding assembly, the assembly not only shields the detection area of ​​the tubing but also compresses and limits the hemodialysis tubing through the deformation of the positioning plates. This enhances the stability of the tubing within the light-shielding assembly and the clamping groove. Simultaneously, the deformed positioning plates seal the gaps at the upper and lower ends of the tubing's detection area, further improving the light-shielding performance of the assembly and refining its functionality.

[0019] By setting a fixing component, the arc-shaped cover in the light-shielding component is fixed at different positions in the tubing storage area, so that the gap between the arc-shaped cover and the clamping groove can be adapted to hemodialysis tubing of different specifications, thereby improving the adaptability of the light-shielding component and maintaining the fixed state of the arc-shaped cover, ensuring the stability of the entire light-shielding component during the detection process.

[0020] By setting the second weakening groove in the fixed component and the first and third weakening grooves on the arc-shaped cover, the structure between the fixed component and the limiting component can undergo corresponding deformation during the displacement of the two components, making the displacement process of the two components smoother. Secondly, the setting of the arc-shaped cover makes the two components cooperate in structure, and the effect achieved by the cooperation further improves the fixing effect of the fixed component. The ingenuity of the arc-shaped cover structure makes the two components complementary and inseparable in function.

[0021] By setting a limiting component, the position of the movable plate is restricted when the arc-shaped cover and the movable plate are in the third engagement state, eliminating the need to maintain the pinched state of the inner handle, thereby reducing the workload of medical staff and facilitating the placement of the hemodialysis tubing in the detection area.

[0022] By setting the second limiting head, the fourth weakening groove, and the second guide surface in the limiting component, the entire limiting component can deform at the fourth weakening groove during the movement of the movable plate. This allows the first and second limiting heads to be fitted onto the outside of the limiting strip to form a limit, making it easier for the moving limiting component to cooperate with the limiting strip. It also makes the release operation of the limiting component less difficult and easier for medical staff to operate. Attached Figure Description

[0023] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0024] Figure 1 A three-dimensional structural diagram of a coagulation detector in a hemodialysis tubing;

[0025] Figure 2 A schematic diagram of the three-dimensional structure inside the opening;

[0026] Figure 3 A schematic diagram of the first state structure of the fixed frame and the movable plate in cooperation;

[0027] Figure 4 This is a schematic diagram of the second state structure for the fixed frame and the movable plate in cooperation.

[0028] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;

[0029] Figure 6 for Figure 4 Enlarged structural diagram at point B;

[0030] Figure 7 A schematic diagram of the third state structure for the cooperation between the fixed frame and the movable plate;

[0031] Figure 8 for Figure 7 Enlarged structural diagram at point C;

[0032] Figure 9 for Figure 7 Enlarged structural diagram at point D;

[0033] Figure 10 for Figure 7 Enlarged structural diagram at point E;

[0034] Figure 11 This is a partial sectional view of the connector structure.

[0035] Figure 12 for Figure 11 Enlarged structural diagram at point F;

[0036] Figure 13 for Figure 11 Enlarged structural diagram at point G in the middle;

[0037] Figure 14 This is a schematic diagram of the structure of the light shield and the positioning plate.

[0038] Figure label:

[0039] 1. Fixing frame; 2. Infrared detection area; 3. Through opening; 4. Pipe storage area; 5. Infrared sensor; 6. Movable plate; 7. Inner grip; 8. Outer grip; 9. Display device; 10. Alarm; 11. Limiting strip; 12. Spring; 13. Limiting plate; 14. Clip groove; 15. Clamping groove; 16. Light shield; 17. Positioning piece; 18. First weakening groove; 19. Insertion groove; 20. Insertion connector; 21. First guide surface; 22. Rack; 23. Gear groove; 24. Second weakening groove; 25. First movable cavity; 26. First rotating rod; 27. Third weakening groove; 28. First limiting head; 29. ​​Second limiting head; 30. Fourth weakening groove; 31. Second guide surface; 32. Second movable cavity; 33. Second rotating rod; 34. Third guide surface.

[0040] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0041] The coagulation detector for hemodialysis tubing provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0042] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0043] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0044] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0045] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0046] like Figures 1 to 14As shown, an embodiment of the present invention provides a coagulation detector for hemodialysis tubing, including a mounting frame 1. The mounting frame 1 has a tubing storage area 4 in the middle. The mounting frame 1 is the main support part of the entire hemodialysis tubing coagulation detector, providing a fixed position for the installation of other devices in the detector and ensuring that the devices have a stable working environment.

[0047] One end of the mounting bracket 1 has a through opening 3, and the other end of the mounting bracket 1 has an infrared detection area 2. An infrared sensor 5 is installed in the infrared detection area 2, and a clamping groove 15 is provided on the outside of the infrared detection area 2. The infrared detection area 2 is the assembly area of ​​the infrared sensor 5. The installation position of the infrared sensor 5 forms a detection area for the hemodialysis tubing. The tubing storage area 4 is the placement area for the hemodialysis tubing. The clamping groove 15 is connected to the input channel of the infrared sensor 5. After the hemodialysis tubing enters the tubing storage area 4 and is placed in the clamping groove 15, the information in the tubing can be collected by the infrared sensor 5. A display device 9 and an alarm 10 are fixedly connected to the outside of the mounting bracket 1. The information in the hemodialysis tubing collected by the infrared sensor 5 is analyzed and displayed by the display device 9. When a blockage occurs, the alarm 10 will sound an alarm to remind medical staff. The principle and installation method of the infrared sensor 5, the display device 9, and the alarm 10 are the same as those of the prior art, and will not be described in detail here.

[0048] The external fixed connection of the fixing frame 1 includes an external handle 8, and a movable plate 6 is fitted inside the fixing frame 1. The external handle 8 allows medical staff to easily pick up and move the coagulation detector of the entire hemodialysis tubing. A light-shielding component is used to shield the detection position of the hemodialysis tubing, and the light-shielding component is connected to the infrared detection area 2. A fixing component is used to fix the light-shielding component, and the fixing component is connected to the movable plate 6. A limiting component is used to fix the relative position between the movable plate 6 and the fixing frame 1, and the limiting component is connected to the movable plate 6.

[0049] In this embodiment, as Figures 2 to 6As shown, the light-shielding assembly includes a first movable cavity 25 formed in the infrared detection area 2. A light-shielding cover 16 is movably connected to the first movable cavity 25 via a first rotating rod 26. The infrared detection area 2 and the light-shielding cover 16 are connected via the first rotating rod 26, allowing the light-shielding cover 16 to deflect under the action of the first rotating rod 26, thereby changing the position of the light-shielding cover 16 in the pipe storage area 4. The first movable cavity 25 provides sufficient space for the deflection of the light-shielding cover 16. A clamping groove 15 is formed on the side of the infrared detection area 2 facing the pipe storage area 4. The middle position of the light-shielding cover 16 corresponds to the position of the clamping groove 15, and evenly distributed positioning pieces 17 are fixedly connected to the inner side of the light-shielding cover 16. When the light shield 16 is fully open, it is in the third engagement state with the movable plate 6. The light shield 16 and the connector 20 deform under tension, fully exposing the clamping groove 15, which facilitates the insertion of the hemodialysis machine tubing. When the light shield 16 is partially closed, it is in the first engagement state with the movable plate 6. The light shield 16 covers the outside of the clamping groove 15, providing shielding protection. When the light shield 16 is fully closed, it is in the second engagement state with the movable plate 6. The light shield 16, together with the clamping groove 15, wraps around the hemodialysis tubing, fixing it in place. The light shield 16 also blocks light from the detection position of the tubing, ensuring the detection effect of the infrared sensor 5.

[0050] In this embodiment, as Figures 3 to 6 as well as Figure 14As shown, the shape of the positioning piece 17 is adapted to the shape of the clamping groove 15, and a third guide surface 34 is provided on the outer side of the positioning piece 17. A first weakening groove 18 and a third weakening groove 27 are provided on the outer side of the light shield 16. The first weakening groove 18 corresponds to the middle position between the positioning piece 17. The setting of the first weakening groove 18 and the third weakening groove 27 makes the thickness of the light shield 16 thinner and the strength weaker at this location. After being subjected to external force, it can deform at the setting of the first weakening groove 18 and the third weakening groove 27. When the light shield 16 and the movable plate 6 are in the second mating state, the light shield 16, together with the clamping groove 15, wraps and fixes the hemodialysis tubing. The positioning piece 17 is squeezed and deformed, covering both ends of the entire detection area. The gap between the photomask 16 and the clamping groove 15 is sealed, thereby enhancing the light-shielding effect of the photomask 16 and further ensuring the accuracy of the data detected by the infrared sensor 5. Secondly, the positioning piece 17 is squeezed and deformed during the process of the photomask 16 wrapping and blocking the pipeline. The elastic force generated by the deformation of the positioning piece 17 squeezes and limits the pipeline, thus limiting the pipeline and preventing the pipeline from sliding between the clamping groove 15 and the photomask 16, which would cause the detection position to change. The third guide surface 34 on the positioning piece 17 makes the area of ​​the end of the positioning piece 17 facing the outside of the clamping groove 15 smaller, making it easier for the positioning piece 17 to be inserted into the gap between the clamping groove 15 and the photomask 16 as it deflects with the photomask 16.

[0051] In this embodiment, as Figures 3 to 7 As shown, the fixing assembly includes a connector 20 fixedly connected to one end of the movable plate 6 extending into the pipeline storage area 4. The connector 20 has a second weakening groove 24 and a second movable cavity 32 on its inner side. The connector 20 and the light shield 16 are movably connected by a second rotating rod 33. One end of the light shield 16 fitted with the second rotating rod 33 is located inside the second movable cavity 32. During the movement of the movable plate 6 in the fixing frame 1, it can drive the connector 20 to move. Then, the displacement of the connector 20 pulls the light shield 16 to move, thereby allowing the light shield 16 to move in the pipeline storage area 4, changing the relative positional relationship between the light shield 16 and the clamping groove 15, so that the light shield 16 and the movable plate 6 can form three different cooperation states, corresponding to the three working states of the entire hemodialysis pipeline coagulation detector before use, during use, and after use.

[0052] In this embodiment, as Figures 4 to 6As shown, the light shield 16 is arc-shaped, and the thickness of the end of the light shield 16 near the first rotating rod 26 is greater than the thickness of the end of the light shield 16 near the second rotating rod 33. The arc-shaped structure of the light shield 16 allows for a certain gap between the light shield 16 and the clamping groove 15 to accommodate the hemodialysis tubing, avoiding the need to rely entirely on the deformation of the light shield 16 to squeeze and fix the tubing, and preventing excessive squeezing of the tubing from affecting the blood flow in the tubing. The light shield 16 is made of light-blocking plastic plate. After the light shield 16 and the clamping groove 15 wrap the hemodialysis tubing, the light-blocking material blocks the detection area of ​​the tubing, thereby reducing the interference of other external light on the detection results of the infrared sensor 5.

[0053] In this embodiment, as Figures 4 to 6 As shown, the infrared detection area 2 has a insertion slot 19 corresponding to the position of the movable plate 6. The insertion slot 19 has evenly distributed toothed grooves 23, and the width of the insertion slot 19 is greater than the sum of the thicknesses of the connector 20 and the toothed rack 22. The width of the insertion slot 19 needs to accommodate the insertion of the connector 20 and the toothed rack 22, and allow for some offset movement space to prevent the connector 20 and the toothed rack 22 from being obstructed by the inner wall of the insertion slot 19 during insertion. The connector 20 is externally fixedly connected to a toothed rack 22 whose shape matches the toothed grooves 23. The end of the connector 20 has a first guide surface 21, which makes the end area of ​​the connector 20 larger. Smaller size makes it easier to insert into the inlet of the insertion slot 19. When wrapping and fixing tubes of different thicknesses, the insertion connector 20 is inserted into different positions in the insertion slot 19. The spring 12 pushes the limiting plate 13 to limit the movable plate 6 through its own elasticity, thereby limiting the insertion connector 20 on the movable plate 6 and maintaining the snap-fit ​​relationship between the rack 22 on the insertion connector 20 and the toothed groove 23 in the insertion slot 19. After the insertion connector 20 is inserted into the insertion slot 19, the light shield 16 can also press against the insertion connector 20 under its own elasticity, thereby achieving a secondary limiting of the insertion connector 20 and further improving the stability of the snap-fit ​​between the rack 22 and the toothed groove 23. This indirectly ensures the wrapping and limiting effect of the light shield 16 and the clamping slot 15 on the hemodialysis tube.

[0054] In this embodiment, as Figure 3As shown, the limiting component includes a limiting plate 13 fixedly connected to the outside of the movable plate 6. The limiting plate 13 is located on the side of the movable plate 6 away from the display device 9, and the limiting plate 13 is located inside the through opening 3. A uniformly distributed spring 12 is fixedly connected between the limiting plate 13 and the inner wall of the through opening 3. When the detector is not subjected to external force, the position of the movable plate 6 is only affected by the elastic force of the spring 12. The light shield 16 and the movable plate 6 are in a first mating state. The end of the connector 20 with the first guide surface 21 is inserted into the connector groove 19, but the rack 22 on the connector 20 is engaged outside the entrance of the connector groove 19, so that the light shield 16 is in a semi-closed state, so that the light shield 16 covers the outside of the clamping groove 15, and provides shielding protection for the clamping groove 15 and the detection area of ​​the infrared sensor 5.

[0055] In this embodiment, as Figures 2 to 11 As shown, the fixed frame 1 has an opening that matches the shape of the movable plate 6. The movable plate 6 passes through the opening, and the end of the movable plate 6 away from the connector 20 extends to the inside of the outer grip 8 and is fixedly connected to the inner grip 7. Both the inner grip 7 and the outer grip 8 have grooves 14 adapted to the shape of the fingers. The design of the grooves 14 on the inner grip 7 and the outer grip 8 can adapt to the finger parts of medical personnel, improving their comfort during use. The movable plate 6 has evenly distributed lightweight openings. The lightweight openings on the movable plate 6 can maintain the overall structural strength of the movable plate 6 without affecting its overall structural strength. Under the premise of reducing the weight of the movable plate 6, the weight of the entire detector is reduced, and the production material cost is reduced. The movable opening in the fixed frame 1 can ensure the sliding ability of the movable plate 6 in the fixed frame 1. In specific operation, the medical staff can hold the inner handle 7 and the outer handle 8, hook the thumb on the outside of the outer handle 8, and hook the other four fingers on the buckle groove 14 on the inner handle 7 and perform a squeezing action, which causes the inner handle 7 to drive the movable plate 6 to slide, change the position and state of the light shield 16, and make the operation of the entire detector simple and convenient.

[0056] In this embodiment, as Figures 7 to 13As shown, the end of the limiting plate 13 is fixedly connected to a first limiting head 28 and a second limiting head 29. A limiting strip 11 is provided on the inner wall of the through opening 3. The ends of the first limiting head 28 and the second limiting head 29 away from the limiting plate 13 are provided with arc surfaces that match the shape of the limiting strip 11. A gap is provided between the first limiting head 28 and the second limiting head 29. When it is necessary to place the hemodialysis tubing, the inner handle 7 is squeezed to move the movable plate 6, so that the light shield 16 and the movable plate 6 are in a third engagement state. The light shield 16 is fully opened. At this time, the limiting strip 11 on the inner wall of the through opening 3 is connected with the limiting component to limit and fix the movable plate 6. Even if the squeezing of the inner handle 7 is released, the movable plate 6 will remain fixed in position under the action of the limiting strip 11 and the limiting component, maintaining the open state of the light shield 16, freeing the hands of medical staff, and allowing medical staff to more easily complete the selection and placement of tubing.

[0057] In this embodiment, as Figures 7 to 13 As shown, a fourth weakening groove 30 is provided at the connection between the first limiting head 28 and the second limiting head 29 and the limiting plate 13. A second guide surface 31 is provided on the side of the second limiting head 29 away from the first limiting head 28. During the cooperation between the limiting component and the limiting strip 11, the second guide surface 31 on the second limiting head 29 contacts the outer surface of the limiting strip 11. The setting of the second guide surface 31 changes the direction of the squeezing force received by the second limiting head 29 after contacting the limiting strip 11, reducing the resistance effect from the limiting strip 11 on the second limiting head 29. Combined with the deformation of the second limiting head 29 and the first limiting head 28 at the fourth weakening groove 30, the first limiting head 28 and the second limiting head 29 can deform and be sleeved on the outside of the limiting strip 11, forming a cooperation with the limiting strip 11 to fix the position of the entire movable plate 6.

[0058] The working principle of the technical solution provided by the present invention is as follows: In use, the outer handle 8 is held to lift and move the entire hemodialysis tubing coagulation detector. The outer handle 8 is held and the inner handle 7 is squeezed, causing the limiting plate 13 to move to the limiting strip 11. During this process, the inner handle 7 drives the movable plate 6 to move. The plug 20 moves away from the plug slot 19 following the movement of the movable plate 6. The space between the light shield 16 and the clamping slot 15 is opened. At the same time, the second guide surface 31 on the second limiting head 29 contacts and squeezes the outside of the limiting strip 11, causing the second limiting head 29 to deform at the fourth weakening groove 30, so that the second limiting head 29 and the first limiting head 28 are engaged with the outside of the limiting strip 11, maintaining the open state of the space between the light shield 16 and the clamping slot 15.

[0059] Select the hemodialysis tubing to be tested and place it between the clamping groove 15 and the light shield 16. Push the inner handle 7 in the opposite direction, and the movable plate 6 will drive the limiting plate 13 to move again, so that the second limiting head 29 on the limiting plate 13 will deform again at the fourth weakening groove 30 and detach from the outside of the limiting strip 11, thus releasing the limiting plate 13. Continue to push the inner handle 7. The inner handle 7 will drive the connector 20 to pull the light shield 16 to deflect through the movement of the movable plate 6, so that the light shield 16 forms a ring around the outside of the hemodialysis tubing.

[0060] While the light shield 16 surrounds the outside of the tubing, the connector 20 is inserted into the connector groove 19. The light shield 16 deforms at the first weakening groove 18 and the third weakening groove 27 to adapt to the size of the hemodialysis tubing and surround the tubing. The positioning piece 17 fits against the outside of the tubing to limit the tubing. At the same time, the elastic force generated by the deformation of the light shield 16 reacts to the connector 20, so that the rack 22 on the connector 20 is engaged with the toothed groove 23 in the connector groove 19 by the elastic force of the light shield 16, thus limiting and fixing the connector 20 and the light shield 16 at the same time.

[0061] The hemodialysis tubing is fixed in the clamping groove 15 by the light shield 16 and the squeezing action of the positioning plate 17. The infrared sensor 5 works and collects information on the blood flowing in the tubing, and transmits the collected data to the display device 9 for processing. The display device 9 analyzes the information collected by the infrared sensor 5. If coagulation is detected, the alarm 10 is activated to issue an alarm, thus completing the entire process of using the coagulation detector of the hemodialysis tubing.

[0062] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A coagulation detector for hemodialysis tubing, characterized in that, The device includes a mounting frame, a pipe storage area in the middle of the mounting frame, a through opening at one end of the mounting frame, and an infrared detection area at the other end of the mounting frame. An infrared sensor is installed in the infrared detection area, and a clamping groove is provided on the outside of the infrared detection area. A display device and an alarm are fixedly connected to the outside of the mounting frame, and an external handle is fixedly connected to the outside of the mounting frame. A movable plate is slidably fitted in the mounting frame. A light-shielding component is used to shield the detection location of the hemodialysis tubing from light, and the light-shielding component is connected to the infrared detection area; A fixing component is used to fix the light-shielding component, and the fixing component is connected to the movable plate; A limiting component is used to fix the relative position between the movable plate and the fixed frame, and the limiting component is connected to the movable plate; The light-shielding component includes a first movable cavity formed in the infrared detection area. An arc-shaped cover is movably connected to the first movable cavity via a first rotating rod. The clamping groove is formed on the side of the infrared detection area facing the pipeline storage area. The middle position of the arc-shaped cover corresponds to the position of the clamping groove, and evenly distributed positioning pieces are fixedly connected to the inner side of the arc-shaped cover. The shape of the positioning piece is adapted to the shape of the clamping groove, and a third guide surface is provided on the outer side of the positioning piece. A first weakening groove and a third weakening groove are provided on the outer side of the arc-shaped cover. The first weakening groove corresponds to the middle position between the positioning piece and the first weakening groove. The fixing component includes a plug that is fixedly connected to one end of the movable plate extending into the pipe receiving area. The plug has a second weakening groove and a second movable cavity on its inner side. The plug and the arc-shaped cover are movably connected by a second rotating rod. One end of the arc-shaped cover that is fitted with the second rotating rod is located inside the second movable cavity. The limiting component includes a limiting plate fixedly connected to the outside of the movable plate. The limiting plate is located on the side of the movable plate away from the display device and is located inside the through opening. A uniformly distributed spring is fixedly connected between the limiting plate and the inner wall of the through opening. The fixed frame has an opening that matches the shape of the movable plate. The movable plate passes through the opening, and the end of the movable plate away from the connector extends to the inside of the outer grip and is fixedly connected to the inner grip. Both the inner grip and the outer grip have slots that match the shape of the fingers. The movable plate has evenly distributed lightweight openings.

2. The coagulation detector for hemodialysis tubing according to claim 1, characterized in that, The arc-shaped cover is arc-shaped, and the thickness of the end of the arc-shaped cover near the first rotating rod is greater than the thickness of the end of the arc-shaped cover near the second rotating rod. The arc-shaped cover is made of light-blocking plastic sheet.

3. The coagulation detector for hemodialysis tubing according to claim 2, characterized in that, The infrared detection area has a plug slot corresponding to the position of the movable plate. The plug slot has evenly distributed toothed grooves, and the width of the plug slot is greater than the sum of the thickness of the plug and the toothed rack. The plug is externally fixedly connected to a toothed rack that matches the shape of the toothed grooves, and the end of the plug is provided with a first guide surface.

4. The coagulation detector for hemodialysis tubing according to claim 3, characterized in that, The end of the limiting plate is fixedly connected to a first limiting head and a second limiting head. A limiting strip is provided on the inner side wall of the through opening. The ends of the first limiting head and the second limiting head away from the limiting plate are provided with arc surfaces that match the shape of the limiting strip, and a gap is provided between the first limiting head and the second limiting head.

5. The coagulation detector for hemodialysis tubing according to claim 4, characterized in that, A fourth weakening groove is provided at the connection between the first limiting head and the second limiting head and the limiting plate, and a second guide surface is provided on the side of the second limiting head away from the first limiting head.

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