Extracorporeal circulation pipeline system

Abstract

The utility model discloses an extracorporeal circulation pipeline system, relates to the field of medical equipment, and can solve the technical problems that in the prior art, when a clamp is close to the joint of a pipeline and a three-way pipe, the clamp cannot be completely closed due to hard materials, or when the clamp is far away from the joint, blood retention is easily caused between the clamp and the pipeline; the problems of thrombus formation and complexity of a pipeline system are solved. The extracorporeal circulation pipeline system comprises a valve body, a perfusion device, a dialysis machine, a first pipeline, a second pipeline, a third pipeline and a fourth pipeline, wherein one end of the first pipeline is connected to a human body, and the other end of the first pipeline is connected to the valve body; the second pipeline and the third pipeline are connected to the inlet end and the outlet end of the perfusion device respectively; the end, away from the perfusion device, of the second pipeline is connected to the valve body, the end, away from the perfusion device, of the third pipeline is connected to the valve body, and the valve body is used for adjusting the communication relation of the first pipeline, the second pipeline, the third pipeline and the fourth pipeline.

Description

Technical Field

[0001] This application relates to the field of medical devices, specifically to an extracorporeal circulation tubing system. Background Technology

[0002] Perfusion devices and dialysis machines are two commonly used devices in blood purification therapy. Perfusion devices are mainly used to adsorb specific toxins or large molecules in the blood. They are typically filled with specific adsorbent materials. When blood flows through the perfusion device, the adsorbent material captures the target toxins, making it particularly suitable for acute poisoning or situations requiring rapid toxin removal. Dialysis machines are the core equipment in hemodialysis therapy, used to remove metabolic waste, small molecule toxins, and excess water from the blood, while maintaining electrolyte and acid-base balance. In clinical applications, perfusion devices and dialysis machines are often used in combination to achieve a comprehensive blood purification effect.

[0003] In the prior art, the perfusion device 6 and the dialysis machine 7 are connected by means of, for example Figure 1 The pipeline system shown includes a first pipeline 1, a second pipeline 2, a third pipeline 3, a fourth pipeline 4, and a fifth pipeline 5. The first pipeline 1, the second pipeline 2, and the third pipeline 3 are connected at their junction by a T-junction 8. The other end of the first pipeline 1 is connected to the human body, the other end of the second pipeline 2 is connected to the perfusion device 6, the other end of the third pipeline 3, the fourth pipeline 4, and the fifth pipeline 5 are connected at their junction by a T-junction 8, the other end of the fourth pipeline 4 is connected to the other side of the perfusion device 6, and the other end of the fifth pipeline 5 is connected to the dialysis machine 7. Through this pipeline system, the human body's blood can be returned to the human body after passing through the perfusion device 6 and then through the dialysis machine 7.

[0004] During the use of the perfusion device 6, it needs to be replaced when its adsorbent material reaches saturation. Therefore, clamps 9 are typically installed at key locations in the tubing system, such as both ends of the third tubing 3, and on the second and fourth tubing 4, to clamp the corresponding tubing, thereby closing or opening it to facilitate replacement of the perfusion device 6 and control the blood flow direction within the tubing system. However, because the connection between the tubing and the tee tube 8 is usually made of a relatively hard material (this hardness is to maintain good sealing and connection stability), when the clamps 9 approach the connection between the tubing and the tee tube 8, the hardness of the material prevents the clamps 9 from completely closing the tubing. When clamp 9 is away from the connection between the tubing and the tee tube 8, although it can clamp the softer tubing section, the distance between clamp 9 and the connection point makes this section prone to blood stagnation. Blood stagnation not only increases the risk of thrombosis (common thrombus length is approximately 0.5-1 cm), but also, during perfusion device 6 replacement or blood return, the thrombus may be flushed off and enter the dialysis machine 7, causing internal clotting and severely affecting equipment operation and treatment effectiveness. Furthermore, the tubing system is relatively complex, including multiple tubing and clamps 9, making operation cumbersome and hindering medical staff from quickly and conveniently completing blood purification procedures. Utility Model Content

[0005] Therefore, this application provides an extracorporeal circulation tubing system to solve the problems in the prior art where the clamp cannot be completely closed when it is close to the connection between the tubing and the tee due to the hardness of the material, or when it is far from the connection, blood can easily stagnate between the clamp and the tubing, thus causing thrombosis and making the tubing system complex.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] An extracorporeal circulation tubing system includes a valve body, an perfusion device, a dialysis machine, a first conduit with one end connected to the human body and the other end connected to the valve body, a second conduit and a third conduit respectively connected to the inlet and outlet ends of the perfusion device, and a fourth conduit with one end connected to the dialysis machine and the other end connected to the valve body. The end of the second conduit away from the perfusion device is connected to the valve body, and the end of the third conduit away from the perfusion device is connected to the valve body. The valve body is used to adjust the connection relationship between the first conduit, the second conduit, the third conduit, and the fourth conduit.

[0008] Optionally, the sidewall of the valve body is provided with four blood channels for connecting the first pipe, the second pipe, the third pipe, and the fourth pipe, respectively, and the intersection of the four blood channels forms a confluence cavity; the cavity wall of the confluence cavity is connected to a partition, which divides the confluence cavity into a first cavity and a second cavity. The first pipe and the second pipe are connected to the first cavity, and the third pipe and the fourth pipe are connected to the second cavity. The partition is provided with blood channels connecting the first cavity and the second cavity; the top wall of the valve body is provided with five valve holes for connecting the blood channels, and the five valve holes correspond one-to-one with the five blood channels. A valve stem for opening and closing the blood channels passes through the valve holes.

[0009] Optionally, the cross-section of the blood channel is circular, and one end of the valve stem extending into the valve hole is integrally formed with a hemisphere that matches the cross-sectional shape of the blood channel. The other end of the valve stem is integrally formed with a valve handle that is easy for a person to grip. A limit component is connected between the valve handle and the top wall of the valve body to restrict the valve stem from sliding out of the valve hole.

[0010] Optionally, the limiting assembly includes two handle wings integrally formed on opposite sides of the valve handle, a limiting plate connected to the top wall of the valve body and used to cooperate with the handle wings, the limiting plate including a first plate connected to the valve body, two second plates integrally connected to both ends of the first plate and perpendicular to the first plate, and a third plate integrally connected to the end of the second plate away from the first plate and perpendicular to the second plate, the first plate having a through hole that cooperates with the valve hole, the third plate being used to abut against the top of the handle wings so that the hemisphere abuts against the wall of the blood channel, the two handle wings and the two third plates corresponding one to one.

[0011] Optionally, the valve stem is fitted with a spring, one end of which abuts against the valve handle and the other end against the top wall of the valve body.

[0012] Optionally, the third pipe is connected to a branch pipe at one end near the valve body, and a pipe cap is threaded to the other end of the branch pipe away from the third pipe.

[0013] Compared with the prior art, this application has at least the following beneficial effects:

[0014] During normal use, human blood enters the valve body through the first conduit. The valve body adjusts the connection according to the preset connection mode, allowing the blood to flow out of the valve body and into the perfusion device through the second conduit. Inside the perfusion device, specific toxins or impurities in the blood are adsorbed and then flow out from the outlet of the perfusion device, re-entering the valve body through the third conduit. Next, the blood flows out of the valve body and enters the dialysis machine through the fourth conduit. Inside the dialysis machine, small molecule toxins are further removed and water balance is regulated before the blood finally flows back to the human body.

[0015] Compared to the complex piping systems of existing technologies, this application connects the perfusion device to the dialysis machine using only one valve body and four pipes, reducing the number of pipes and thus lowering the risk of blood stasis and thrombosis. Furthermore, by adjusting the connection between the first, second, third, and fourth pipes through the valve body, the function of multiple clamps in existing technologies is replaced. This not only avoids incomplete clamping due to material hardness but also simplifies operation, improving system safety and efficiency. Attached Figure Description

[0016] To more intuitively illustrate the prior art and this application, several exemplary figures are provided below. It should be understood that the specific shapes and structures shown in the figures should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary figures, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0017] Figure 1 This is a schematic diagram of the piping system of the perfusion device and dialysis machine provided in the background art;

[0018] Figure 2 This application provides a schematic diagram of the structure of an extracorporeal circulation tubing system according to one embodiment.

[0019] Figure 3 A schematic diagram of the structure of a valve body for an extracorporeal circulation pipeline system provided in one embodiment of this application;

[0020] Figure 4 for Figure 3 Partial structural explosion diagram;

[0021] Figure 5 for Figure 4 Partial structural diagram;

[0022] Figure 6 This is a schematic diagram illustrating the fit between a valve stem, a valve port, and a blood channel according to one embodiment of this application.

[0023] Figure 7 for Figure 4 A cross-sectional view along the aa direction;

[0024] Figure 8 This is a schematic diagram of the cavity inside the valve body provided in one embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. First tubing; 2. Second tubing; 3. Third tubing; 4. Fourth tubing; 5. Fifth tubing; 6. Irrigation device; 7. Dialysis machine; 8. T-joint; 9. Clamp; 10. Valve body; 11. Valve stem; 12. Limiting assembly; 121. First plate; 1211. Through hole; 122. Second plate; 123. Third plate; 124. Handle wing; 13. Spring; 14. Combination cavity; 141. First cavity; 142. Second cavity; 15. Partition; 101. First conduit; 102. Second conduit; 103. Third conduit; 1031. Branching tube; 104. Fourth conduit; 105. Blood channel. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0029] refer to Figure 2-8 This application discloses an extracorporeal circulation tubing system, including a valve body 10, an perfusion device 6, a dialysis machine 7, a first pipe 101 with one end connected to the human body and the other end connected to the valve body 10, a second pipe 102 and a third pipe 103 respectively connected to the inlet and outlet ends of the perfusion device 6, and a fourth pipe 104 with one end connected to the dialysis machine 7 and the other end connected to the valve body 10. The end of the second pipe 102 away from the perfusion device 6 is connected to the valve body 10, and the end of the third pipe 103 away from the perfusion device 6 is connected to the valve body 10. The valve body 10 is used to adjust the connection relationship between the first pipe 101, the second pipe 102, the third pipe 103 and the fourth pipe 104.

[0030] During normal use, human blood enters valve body 10 through first pipe 101. Valve body 10 adjusts the connection relationship according to preset connection mode, so that blood flows out of valve body 10 and enters perfusion device 6 through second pipe 102. In perfusion device 6, specific toxins or impurities in the blood are adsorbed and flow out from the outlet end of perfusion device 6. Blood then enters valve body 10 again through third pipe 103. Then, blood flows out of valve body 10 and enters dialysis machine 7 through fourth pipe 104. In dialysis machine 7, small molecule toxin removal and water balance regulation are further completed, and the blood finally flows back to human body.

[0031] Compared to the complex piping systems of existing technologies, this application achieves the connection between the perfusion device 6 and the dialysis machine 7 using only one valve body 10 and four pipes, reducing the number of pipes and thus lowering the risk of blood stasis and thrombosis. Furthermore, by adjusting the connection between the first pipe 101, the second pipe 102, the third pipe 103, and the fourth pipe 104 via the valve body 10, the function of multiple clamps 9 in existing technologies is replaced. This not only avoids incomplete clamping due to material hardness but also simplifies operation, improving system safety and efficiency.

[0032] It should be noted that the "pipeline" in this application has the same technical structure and function as the "pipeline" in the prior art, only the terminology is different. In addition, an extra pipe is provided between the dialysis machine 7 and the human body to allow the purified blood to be returned to the human body.

[0033] The side wall of the valve body 10 is provided with four blood channels 105 for connecting the first pipe 101, the second pipe 102, the third pipe 103, and the fourth pipe 104, respectively. The intersection of the four blood channels 105 forms a confluence cavity 14. The cavity wall of the confluence cavity 14 is connected to a partition 15, which divides the confluence cavity 14 into a first cavity 141 and a second cavity 142. The first pipe 101 and the second pipe 102 are connected to the first cavity 141, and the third pipe 103 and the fourth pipe 104 are connected to the second cavity 142. The partition 15 is provided with blood channels 105 that connect the first cavity 141 and the second cavity 142. The top wall of the valve body 10 is provided with five valve holes that connect to the blood channels 105. The five valve holes correspond one-to-one with the five blood channels 105. A valve stem 11 for opening and closing the blood channels 105 passes through the valve holes.

[0034] When human blood needs to pass through the perfusion device 6 and dialysis machine 7 before returning to the body, during operation, all four valve stems 11 corresponding to the first pipe 101, second pipe 102, third pipe 103, and fourth pipe 104 are opened, and the valve stems 11 of the blood passage 105 of the partition 15 are closed. At this time, blood flows from the first pipe 101 into the first cavity 141 of the valve body 10, then enters the perfusion device 6 through the second pipe 102, and after being purified by the perfusion device 6, flows back to the second cavity 142 of the valve body 10 through the third pipe 103, and finally enters the dialysis machine 7 through the fourth pipe 104 for further purification before returning to the human body.

[0035] When the adsorbent material of the perfusion device 6 becomes saturated and needs to be replaced, to prevent blood from flowing through the saturated adsorption area of ​​the perfusion device 6, the valve stem 11 corresponding to the second pipe 102 and the third pipe 103 can be closed, while the valve stem 11 corresponding to the first pipe 101, the fourth pipe 104, and the blood channel 105 of the partition 15 can be opened. At this time, blood enters the first cavity 141 of the valve body 10 from the first pipe 101, then flows into the second cavity 142 through the blood channel 105 on the partition 15, and then directly enters the dialysis machine 7 through the fourth pipe 104, and finally returns to the human body. By switching the flow direction, the perfusion device 6 can be replaced without stopping the blood purification process.

[0036] The cross-section of the blood channel 105 is circular. One end of the valve stem 11 that extends into the valve hole is integrally formed with a hemisphere that matches the cross-sectional shape of the blood channel 105. The other end of the valve stem 11 is integrally formed with a valve handle that is easy for a person to grip. A limit component 12 is connected between the valve handle and the top wall of the valve body 10 to limit the valve stem 11 from sliding out of the valve hole.

[0037] During use, medical staff operate the valve stem 11 by holding its handle and inserting or removing it. When the valve stem 11 is inserted into the valve hole, its one-piece molded hemisphere at one end fits against the wall of the blood channel 105, thereby closing the blood channel 105 and preventing blood flow. When the valve stem 11 is pulled out to the appropriate position, the hemisphere separates from the wall of the blood channel 105, the blood channel 105 is opened, and blood can flow smoothly.

[0038] To prevent the valve stem 11 from accidentally dislodging from the valve hole during operation, this application designs a limiting component 12 to restrict the sliding of the valve stem 11.

[0039] In some embodiments, the valve stem 11 and the valve bore may be interference-fitted.

[0040] In some embodiments, the cross-section of the blood channel 105 can be a rectangle or other shapes, and one end of the valve stem 11 can be a cuboid or other shape adapted to a rectangle.

[0041] The limiting assembly 12 includes two handle wings 124 integrally formed on opposite sides of the valve handle, and a limiting plate connected to the top wall of the valve body 10 for engaging the handle wings 124. The limiting plate includes a first plate 121 connected to the valve body 10, two second plates 122 integrally connected to both ends of the first plate 121 and perpendicular to the first plate 121, and a third plate 123 integrally connected to the end of the second plate 122 away from the first plate 121 and perpendicular to the second plate 122. The first plate 121 has a through hole 1211 for engaging the valve hole. The third plate 123 is used to abut against the top of the handle wings 124 so that the hemisphere abuts against the wall of the blood channel 105. The two handle wings 124 and the two third plates 123 correspond one-to-one.

[0042] During operation, medical personnel first rotate the valve handle to misalign the handle wings 124 on both sides with the corresponding third plate 123 of the limiting plate, providing space for the longitudinal (perpendicular to the top wall of the valve body 10) movement of the valve stem 11. Then, by pressing the valve stem 11, one end of the hemisphere abuts against the wall of the blood passage 105, closing the blood passage 105 and preventing blood flow. To ensure the valve stem 11 remains stable in the closed position, medical personnel rotate the valve handle again to adjust the relative positions of the handle wings 124 and the corresponding third plate 123, with the top of the handle wings 124 pressed against the bottom side of the third plate 123, thereby restricting the sliding of the valve stem 11 along the length of the valve hole.

[0043] A spring 13 is fitted onto the valve stem 11. One end of the spring 13 abuts against the valve handle, and the other end abuts against the top wall of the valve body 10.

[0044] During use, the spring 13 fitted onto the valve stem 11 plays an auxiliary role. When medical personnel need to pull out the valve stem 11 to open the blood passage 105, one end of the spring 13 abuts against the valve handle, and the other end abuts against the top wall of the valve body 10. The elastic force of the spring 13 can effectively push the valve stem 11 upward, thereby reducing the force required for medical personnel to pull out the valve stem 11 and making the operation more effortless.

[0045] The third pipe 103 is connected to a branch pipe 1031 at one end near the valve body 10, and a pipe cap is threaded to the other end of the branch pipe 1031 away from the third pipe 103.

[0046] Before using the extracorporeal circulation tubing system, to ensure the safety of blood flow and the normal function of the perfusion device 6, air bubbles need to be removed from the perfusion device 6. During the air removal operation, the first pipe 101 and the fourth pipe 104 are temporarily not connected to the patient or the dialysis machine 7. Medical personnel close the blood channel 105 corresponding to the fourth pipe 104 in the valve body 10 and the blood channel 105 on the partition 15. Then, they open the cap on the branch pipe 1031 and inject saline into the first pipe 101, allowing the saline to enter the perfusion device 6 through the first chamber 141 and the second pipe 102. Air bubbles are carried out of the perfusion device 6 with the flow of saline, enter the branch pipe 1031 through the third pipe 103, and are discharged from the cap.

[0047] After the bubbles are expelled, the medical staff close the cap of the branch tube 1031, then connect the first tube 101 to the human body and the fourth tube 104 to the dialysis machine 7, and adjust the valve body 10 again, and the system enters normal working state.

[0048] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

[0049] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. An extracorporeal circulation tubing system, characterized in that, The device includes a valve body, an irrigation device, a dialysis machine, a first pipe with one end connected to the human body and the other end connected to the valve body, a second pipe and a third pipe respectively connected to the inlet and outlet ends of the irrigation device, and a fourth pipe with one end connected to the dialysis machine and the other end connected to the valve body. The end of the second pipe away from the irrigation device is connected to the valve body, and the end of the third pipe away from the irrigation device is connected to the valve body. The valve body is used to adjust the connection relationship between the first pipe, the second pipe, the third pipe, and the fourth pipe.

2. The extracorporeal circulation tubing system according to claim 1, characterized in that, The valve body has four blood channels on its side wall for connecting the first pipe, the second pipe, the third pipe and the fourth pipe respectively, and the intersection of the four blood channels forms a confluence cavity; The cavity wall of the confluence cavity is connected to a partition, which divides the confluence cavity into a first cavity and a second cavity. The first pipe and the second pipe are connected to the first cavity, and the third pipe and the fourth pipe are connected to the second cavity. The partition is provided with a blood channel connecting the first cavity and the second cavity. The top wall of the valve body is provided with five valve holes that communicate with the blood channels. The five valve holes correspond one-to-one with the five blood channels. A valve stem for opening and closing the blood channels passes through the valve holes.

3. The extracorporeal circulation tubing system according to claim 2, characterized in that, The cross-section of the blood channel is circular. One end of the valve stem that extends into the valve hole is integrally formed with a hemisphere that matches the cross-sectional shape of the blood channel. The other end of the valve stem is integrally formed with a valve handle that is easy for a person to grip. A limit component is connected between the valve handle and the top wall of the valve body to prevent the valve stem from sliding out of the valve hole.

4. The extracorporeal circulation tubing system according to claim 3, characterized in that, The limiting assembly includes two handle wings integrally formed on opposite sides of the valve handle, a limiting plate connected to the top wall of the valve body and used to cooperate with the handle wings, the limiting plate including a first plate connected to the valve body, two second plates integrally connected to both ends of the first plate and perpendicular to the first plate, and a third plate integrally connected to the end of the second plate away from the first plate and perpendicular to the second plate. The first plate has a through hole that cooperates with the valve hole, and the third plate is used to abut against the top of the handle wings so that the hemisphere abuts against the wall of the blood channel. The two handle wings and the two third plates correspond one-to-one.

5. The extracorporeal circulation tubing system according to claim 4, characterized in that, The valve stem is fitted with a spring, one end of which abuts against the valve handle and the other end against the top wall of the valve body.

6. The extracorporeal circulation tubing system according to claim 1, characterized in that, The third pipe is connected to a branch pipe at one end near the valve body, and a pipe cap is threaded to the other end of the branch pipe away from the third pipe.

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