Blood connecting tube

Abstract

The utility model provides a blood connecting pipe which comprises a first connecting pipeline, a second connecting pipeline, a first bypass pipeline and a second bypass pipeline. The first blood treatment device can be connected with the hemodialysis tube through the first connecting pipeline and the second connecting pipeline and used for leading out and treating blood of the human body and then conveying the blood into the human body. The second blood treatment equipment can be connected with the first connecting pipeline through the first bypass pipeline and connected with the second connecting pipeline through the second bypass pipeline, so that part of blood in the first connecting pipeline is introduced into the second blood treatment equipment to be treated, and the treated blood is conveyed into the second connecting pipeline. Thus, in the blood treatment process by using the first blood treatment device, the second blood treatment device can be used for treating blood at the same time, switching between the two blood treatment devices is not needed, a blood connecting pipe used for connecting the blood treatment devices and a human body is not needed, the treatment cost of a patient is reduced, and the treatment efficiency is improved. And the operation process of medical staff is also simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a blood connection tube. Background Art

[0002] Currently, during the process of blood filtration treatment, if plasma exchange treatment is required, the blood filtration pipeline connected between the blood filtration device and the patient needs to be removed first to end the blood filtration treatment, and then a plasma exchange pipeline is selected and connected between the patient and the plasma exchange device for plasma exchange treatment.

[0003] After the plasma exchange treatment is completed, the plasma exchange pipeline connected between the plasma exchange device and the patient needs to be removed first to end the plasma exchange treatment, and then a blood filtration pipeline is selected and connected between the patient and the blood filtration device to resume blood filtration treatment.

[0004] In this process, a set of blood filtration pipeline and a set of plasma exchange pipeline need to be wasted, increasing the treatment cost for the patient, and medical staff need to spend a lot of time disassembling and replacing the connecting tubes. Summary of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a blood connection tube, aiming to solve the problem that in the related art, when plasma exchange treatment is required during blood filtration treatment, a set of blood filtration pipeline and a set of plasma exchange pipeline need to be wasted.

[0006] The utility model provides a blood connection tube, comprising:

[0007] A first connection pipeline, the first end of the first connection pipeline is used to connect with the arterial end of the hemodialysis tube, and the second end of the first connection pipeline is used to connect with the blood drawing end of the first blood treatment device;

[0008] A second connection pipeline, the first end of the second connection pipeline is used to connect with the venous end of the hemodialysis tube, and the second end of the second connection pipeline is used to connect with the blood return end of the first blood treatment device;

[0009] A first bypass pipeline, the first end of the first bypass pipeline is connected with the first connection pipeline, and the second end of the first bypass pipeline is used to connect with the blood drawing end of the second blood treatment device;

[0010] A second bypass pipeline, the first end of the second bypass pipeline is connected with the second connection pipeline, and the second end of the second bypass pipeline is used to connect with the blood return end of the second blood treatment device.

[0011] According to the blood connection tube provided by the present utility model, it further includes a circulation control pipeline. The first end of the circulation control pipeline is connected to the first connection pipeline, and the connection point is located between the first end of the first connection pipeline and the first bypass pipeline. The second end of the circulation control pipeline is connected to the second connection pipeline, and the connection point is located between the first end of the second connection pipeline and the second bypass pipeline. The circulation control pipeline is used to control the on-off between the first connection pipeline and the second connection pipeline.

[0012] According to the blood connection tube provided by the present utility model, the first connection pipeline includes:

[0013] A first connection tube, and first pipe joints are provided at both the first end and the second end of the first connection tube;

[0014] A first flow blocking device, which is arranged on the first connection tube and is located at a position close to the first end of the first connection tube.

[0015] According to the blood connection tube provided by the present utility model, the second connection pipeline includes:

[0016] A second connection tube, and second pipe joints are provided at both the first end and the second end of the second connection tube;

[0017] A second flow blocking device, which is arranged on the second connection tube and is located at a position close to the first end of the second connection tube.

[0018] According to the blood connection tube provided by the present utility model, the circulation control pipeline includes:

[0019] A third connection tube, the first end of the third connection tube is connected to the first connection pipeline, and the connection point is located between the first end of the first connection pipeline and the first bypass pipeline. The second end of the third connection tube is connected to the second connection pipeline, and the connection point is located between the first end of the second connection pipeline and the second bypass pipeline;

[0020] A third flow blocking device, which is arranged on the third connection tube.

[0021] According to the blood connection tube provided by the present utility model, the first bypass pipeline includes:

[0022] A fourth connection tube, the first end of the fourth connection tube is communicated with the first connection tube, and a third pipe joint for connecting with the blood drawing end of the second blood treatment device is provided at the second end of the fourth connection tube;

[0023] A fourth flow blocking device, which is arranged on the fourth connection tube.

[0024] According to the blood connection tube provided by the present utility model, the second bypass pipeline includes:

[0025] A fifth connection tube, the first end of the fifth connection tube is communicated with the second connection tube, and the second end of the fifth connection tube is provided with a fourth pipe joint for connecting with the blood return end of the second blood treatment device;

[0026] A fifth flow blocking device, the fifth flow blocking device is arranged on the fifth connection tube.

[0027] According to the blood connection tube provided by the present utility model, the first flow blocking device, the second flow blocking device, the third flow blocking device, the fourth flow blocking device and the fifth flow blocking device are Robert clamps.

[0028] According to the blood connection tube provided by the present utility model, the first flow blocking device, the second flow blocking device, the third flow blocking device, the fourth flow blocking device and the fifth flow blocking device are two-way valves.

[0029] According to the blood connection tube provided by the present utility model, the first pipe joint, the second pipe joint, the third pipe joint and the fourth pipe joint are threaded joints or plug-in joints.

[0030] Due to the adoption of the above technical solutions, the present utility model has the following advantages:

[0031] The blood connection tube provided by the present utility model includes a first connection pipeline, a second connection pipeline, a first bypass pipeline, and a second bypass pipeline. The first end of the first connection pipeline is used to connect to the arterial end of the hemodialysis tube, and the second end of the first connection pipeline is used to connect to the blood drawing end of the first blood treatment device. The first end of the second connection pipeline is used to connect to the venous end of the hemodialysis tube, and the second end of the second connection pipeline is used to connect to the blood return end of the first blood treatment device. In this way, the patient's blood enters the first blood treatment device through the arterial end of the hemodialysis tube and the first connection pipeline for treatment, and then the treated blood flows back to the patient's body through the second connection pipeline and the hemodialysis tube. The first end of the first bypass pipeline is connected to the first connection pipeline, and the second end of the first bypass pipeline is used to connect to the blood drawing end of the second blood treatment device. The first end of the second bypass pipeline is connected to the second connection pipeline, and the second end of the second bypass pipeline is used to connect to the blood return end of the second blood treatment device. In this way, during the process of the first blood treatment device treating the blood, the second blood treatment device can introduce a part of the blood in the first connection pipeline into the second blood treatment device through the first bypass pipeline. After the blood is treated by the second blood treatment device, the blood is transported back to the second connection pipeline through the second bypass pipeline. The blood connection tube provided by the present utility model can supply two different blood treatment devices to treat blood. When another blood treatment is required before one blood treatment is completed, there is no need to replace the connection pipeline, which saves the patient's treatment cost and simplifies the operation process of medical staff. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic structural diagram of the blood connection tube provided by an embodiment of the present utility model;

[0034] Figure 2 It is a schematic structural diagram of the blood connection tube provided by an embodiment of the present utility model connected to the first blood treatment device and the second blood treatment device at the same time.

[0035] Reference Signs:

[0036] 100: First connecting pipeline; 110: First connecting pipe; 120: First flow blocking device; 130: First pipe joint; 200: Second connecting pipeline; 210: Second connecting pipe; 220: Second flow blocking device; 230: Second pipe joint; 300: First bypass pipeline; 310: Fourth connecting pipe; 320: Fourth flow blocking device; 330: Third pipe joint; 400: Second bypass pipeline; 410: Fifth connecting pipe; 420: Fifth flow blocking device; 430: Fourth pipe joint; 500: Circulation control pipeline; 510: Third connecting pipe; 520: Third flow blocking device; 600: Hemodialysis tube; 700: First blood treatment device; 800: Second blood treatment device. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without any creative work shall fall within the protection scope of the present utility model.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means more than two unless otherwise specifically defined.

[0040] In the present utility model, unless otherwise clearly specified or defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified or defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0042] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0043] The present utility model provides a blood connection tube, which includes a first connection pipeline, a second connection pipeline, a first bypass pipeline and a second bypass pipeline. The first blood treatment device can be connected to the human body through the first connection pipeline and the second connection pipeline, and is used for drawing out the blood of the human body for treatment and then transporting it back into the human body. The second blood treatment device can be connected to the first connection pipeline through the first bypass pipeline and to the second connection pipeline through the second bypass pipeline, so as to introduce a part of the blood in the first connection pipeline into the second blood treatment device for treatment, and transport the blood to the second connection pipeline after the treatment is completed. In this way, during the process of using the first blood treatment device for blood treatment, the second blood treatment device can be used to treat the blood at the same time, without switching between the two blood treatment devices, and thus the blood connection tube used for connecting the blood treatment device and the human body will not be wasted due to switching the blood treatment device, reducing the treatment cost of the patient and simplifying the operation process of the medical staff.

[0044] The following will describe the blood connection tube of the present utility model in conjunction with Figure 1 and Figure 2 describe the blood connection tube of the present utility model.

[0045] An embodiment of the present utility model provides a blood connection tube, which includes a first connection pipeline 100, a second connection pipeline 200, a first bypass pipeline 300 and a second bypass pipeline 400.

[0046] The first end of the first connection pipeline 100 is used to connect to the arterial end of the hemodialysis tube 600, and the second end is used to connect to the blood drawing end of the first blood treatment device 700. The first end of the second connection pipeline 200 is used to connect to the venous end of the hemodialysis tube 600, and the second end is used to connect to the blood return end of the first blood treatment device 700.

[0047] Specifically, the first blood treatment device 700 can be a hemofiltration device. The first end of the first connection pipeline 100 is used to connect to the arterial end of the hemodialysis tube 600, and the second end of the first connection pipeline 100 is used to connect to the blood drawing end of the hemofiltration device. In this way, the hemofiltration device can introduce the blood of the patient into the hemofiltration device through the first connection pipeline 100 and the hemodialysis tube 600 for hemofiltration treatment. The first end of the second connection pipeline 200 is used to connect to the venous end of the hemodialysis tube 600, and the second end of the second connection pipeline 200 is used to connect to the blood return end of the hemofiltration device. In this way, the hemofiltration device can transport the blood after the hemofiltration treatment is completed back into the patient's body through the second connection pipeline 200 and the hemodialysis tube 600, thus forming a complete blood circulation and completing the hemofiltration treatment of the blood during the circulation process.

[0048] The second blood treatment device 800 can be a plasma exchange device. The first end of the first bypass pipeline 300 is connected to the first connection pipeline 100, and the second end of the first bypass pipeline 300 is used to be connected to the blood drawing end of the plasma exchange device. In this way, the plasma exchange device can introduce part of the blood in the first connection pipeline 100 into the plasma exchange device for plasma exchange treatment. The first end of the second bypass pipeline 400 is connected to the second connection pipeline 200, and the second end of the second bypass pipeline 400 is used to be connected to the blood return end of the plasma exchange device. In this way, the plasma exchange device can transport the blood after the plasma exchange treatment into the second connection pipeline 200, and the blood flows back to the patient's body through the second connection pipeline 200 and the hemodialysis tube 600.

[0049] The blood connection tube provided by the utility model can directly introduce blood into the blood filtration device through the first connection pipeline 100, and transport the blood after the blood filtration treatment back to the patient's body through the second connection pipeline 200. If plasma exchange treatment is required during the blood filtration treatment, the plasma exchange device can introduce the blood in the first connection pipeline 100 into the plasma exchange device through the first bypass pipeline 300 for plasma exchange treatment, and transport the blood after the plasma exchange treatment into the second connection pipeline 200 through the second bypass pipeline 400, and the blood flows back to the patient's body through the second connection pipeline 200.

[0050] In the prior art, the blood connection tube can only connect the hemodialysis tube 600 with the blood filtration device or the plasma exchange device separately. During the blood filtration treatment, if plasma exchange treatment is required, the blood connection tube between the hemodialysis tube 600 and the blood filtration device needs to be removed, and then a new blood connection tube is used to connect the hemodialysis tube 600 and the plasma exchange device. When the plasma exchange treatment ends and the blood filtration treatment continues, the blood connection tube between the hemodialysis tube 600 and the plasma exchange device needs to be removed, and then a new blood connection tube is used to connect the hemodialysis tube 600 and the blood filtration device. This process requires wasting two sets of blood connection tubes, increasing the treatment cost of the patient.

[0051] The blood connection tube provided by the embodiment of the utility model can achieve the effect of connecting the hemodialysis tube 600 with both the blood filtration device and the plasma exchange device at the same time. Plasma exchange treatment can be carried out simultaneously during the blood filtration treatment without replacing the blood connection tube, saving the treatment cost of the patient.

[0052] In some embodiments of the present utility model, a circulation control pipeline 500 is further included. The first end of the circulation control pipeline 500 is connected to the first connection pipeline 100, and the connection point is located between the first end of the first connection pipeline 100 and the first bypass pipeline 300. The second end of the circulation control pipeline 500 is connected to the second connection pipeline 200, and the connection point is located between the first end of the second connection pipeline 200 and the second bypass pipeline 400. The circulation control pipeline 500 is used to control the on-off between the first connection pipeline 100 and the second connection pipeline 200.

[0053] Specifically, the first end of the first connection pipeline 100 can be defined as point A, the second end of the first connection pipeline 100 can be defined as point B, the first end of the second connection pipeline 200 can be defined as point C, the second end of the second connection pipeline 200 can be defined as point D. The first end of the first bypass pipeline 300 intersects with the first connection pipeline 100 at point E, the circulation control pipeline 500 intersects with the first connection pipeline 100 at point F, the first end of the second bypass pipeline 400 intersects with the second connection pipeline 200 at point G, and the circulation control pipeline 500 intersects with the second connection pipeline 200 at point H.

[0054] Among them, along the blood flow direction of the first connection pipeline 100, points A, F, E, and B are distributed in sequence. Along the blood flow direction of the second connection pipeline 200, points D, G, H, and C are distributed in sequence.

[0055] When the blood drawing of the hemodialysis tube 600 is not smooth or the blood return is not smooth, the connection between the first connection pipeline 100 and the second connection pipeline 200 and the hemodialysis tube 600 can be cut off, and at the same time, the circulation control pipeline 500 is conducted. At this time, the first connection pipeline 100 and the second connection pipeline 200 are conducted through the circulation control pipeline 500. The blood can circulate around points F, B, the first blood treatment device 700, D, H, and F. The blood can also circulate through points F, E, the second blood treatment device 800, G, H, and F. After the hemodialysis tube 600 is dredged, the circulation control pipeline 500 is cut off again, and the connection between the hemodialysis tube 600 and the first connection pipeline 100 and the second connection pipeline 200 is conducted.

[0056] In some embodiments of the present invention, the first connection pipeline 100 includes a first connection pipe 110 and a first flow blocking device 120. First pipe joints 130 are provided at both the first end and the second end of the first connection pipe 110. The first flow blocking device 120 is arranged on the first connection pipe 110 and is located at a position close to the first end of the first connection pipe 110.

[0057] Specifically, the first pipe joint 130 can be a plug joint or a threaded joint adapted to the arterial end of the hemodialysis tube 600 or the blood drawing end of the first blood treatment device 700. The first pipe joint 130 is provided at both the first end and the second end of the first connecting pipe 110. The first flow blocking device 120 can be arranged on the first connecting pipe 110 and at any position between point A and point F. The first flow blocking device 120 can control the on-off of the first connecting pipe 110.

[0058] Similarly, the second connecting pipeline 200 includes a second connecting pipe 210 and a second flow blocking device 220. Second pipe joints 230 are provided at both the first end and the second end of the second connecting pipe 210. The second flow blocking device 220 is arranged on the second connecting pipe 210 and at a position close to the first end of the second connecting pipe 210.

[0059] Specifically, the second pipe joint 230 can be a plug joint or a threaded joint adapted to the venous end of the hemodialysis tube 600 or the blood return end of the first blood treatment device 700. Second pipe joints 230 are provided at both the first end and the second end of the second connecting pipe 210. The second flow blocking device 220 can be arranged on the second connecting pipe 210 and at any position between point C and point H. The second flow blocking device 220 can control the on-off of the second connecting pipe 210.

[0060] In some embodiments of the present invention, the circulation control pipeline 500 includes a third connecting pipe 510 and a third flow blocking device 520. The first end of the third connecting pipe 510 is connected to the first connecting pipeline 100, and the connection point is located between the first end of the first connecting pipeline 100 and the first bypass pipeline 300. The second end of the third connecting pipe 510 is connected to the second connecting pipeline 200, and the connection point is located between the first end of the second connecting pipeline 200 and the second bypass pipeline 400. The third flow blocking device 520 is arranged on the third connecting pipe 510.

[0061] Specifically, the circulation control pipeline 500 includes a third connecting pipe 510 and a third flow blocking device 520. The first end of the third connecting pipe 510 is connected to the first connecting pipe 110 at point F, and the second end of the third connecting pipe 510 is connected to the second connecting pipe 210 at point H. The third flow blocking device 520 is arranged on the third connecting pipe 510 to control the on-off of the third connecting pipe 510.

[0062] In some embodiments of the present invention, the first bypass pipeline 300 includes a fourth connecting pipe 310 and a fourth flow blocking device 320. The first end of the fourth connecting pipe 310 is connected to the first connecting pipe 110. A third pipe joint 330 for connecting to the blood drawing end of the second blood treatment device 800 is provided at the second end of the fourth connecting pipe 310. The fourth flow blocking device 320 is arranged on the fourth connecting pipe 310.

[0063] Specifically, the first bypass pipeline 300 includes a fourth connecting pipe 310 and a fourth flow blocking device 320. The first end of the fourth connecting pipe 310 intersects and connects with the first connecting pipe 110 at point E. The second end of the fourth connecting pipe 310 is provided with a third pipe joint 330, which can be a plug-in joint or a threaded joint adapted to the blood drawing end of the second blood treatment device 800. The fourth flow blocking device 320 is arranged on the fourth connecting pipe 310.

[0064] Similarly, the second bypass pipeline 400 includes a fifth connecting pipe 410 and a fifth flow blocking device 420. The first end of the fifth connecting pipe 410 is connected to the second connecting pipe 210. The second end of the fifth connecting pipe 410 is provided with a fourth pipe joint 430 for connecting to the blood return end of the second blood treatment device 800. The fifth flow blocking device 420 is arranged on the fifth connecting pipe 410.

[0065] Specifically, the second bypass pipeline 400 includes a fifth connecting pipe 410 and a fifth flow blocking device 420. The first end of the fifth connecting pipe 410 intersects and connects with the second connecting pipe 210 at point G. The second end of the fifth connecting pipe 410 is provided with a fourth pipe joint 430, which can be a plug-in joint or a threaded joint adapted to the blood return end of the second blood treatment device 800. The fifth flow blocking device 420 is arranged on the fifth connecting pipe 410.

[0066] When a second blood treatment device 800 is connected between the second end of the fourth connecting pipe 310 and the second end of the fifth connecting pipe 410, and it is necessary to use the second blood treatment device 800 for corresponding blood treatment, the fourth flow blocking device 320 and the fifth flow blocking device 420 can be made to conduct the corresponding fourth connecting pipe 310 and fifth connecting pipe 410. When the treatment is over, the fourth flow blocking device 320 and the fifth flow blocking device 420 can be made to cut off the corresponding fourth connecting pipe 310 and fifth connecting pipe 410.

[0067] In some embodiments of the present invention, the first flow blocking device 120, the second flow blocking device 220, the third flow blocking device 520, the fourth flow blocking device 320, and the fifth flow blocking device 420 can be devices such as Robert clamps or two-way valves that can block or conduct the corresponding pipelines.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A blood connection tube, characterized in that, Comprising: A first connecting pipeline (100), the first end of the first connecting pipeline (100) is used to connect with the arterial end of the hemodialysis tube (600), and the second end of the first connecting pipeline (100) is used to connect with the blood drawing end of the first blood treatment device (700); A second connecting pipeline (200), the first end of the second connecting pipeline (200) is used to connect with the venous end of the hemodialysis tube (600), and the second end of the second connecting pipeline (200) is used to connect with the blood return end of the first blood treatment device (700); A first bypass pipeline (300), the first end of the first bypass pipeline (300) is connected with the first connecting pipeline (100), and the second end of the first bypass pipeline (300) is used to connect with the blood drawing end of the second blood treatment device (800); A second bypass pipeline (400), the first end of the second bypass pipeline (400) is connected with the second connecting pipeline (200), and the second end of the second bypass pipeline (400) is used to connect with the blood return end of the second blood treatment device (800).

2. The blood connection tube according to claim 1, wherein, It further comprises a circulation control pipeline (500), the first end of the circulation control pipeline (500) is connected with the first connecting pipeline (100), and the connection point is located between the first end of the first connecting pipeline (100) and the first bypass pipeline (300), the second end of the circulation control pipeline (500) is connected with the second connecting pipeline (200), and the connection point is located between the first end of the second connecting pipeline (200) and the second bypass pipeline (400), and the circulation control pipeline (500) is used to control the on-off between the first connecting pipeline (100) and the second connecting pipeline (200).

3. The blood connection tube according to claim 2, characterized in that The first connecting pipeline (100) comprises: A first connecting tube (110), both the first end and the second end of the first connecting tube (110) are provided with first pipe joints (130); A first flow blocking device (120), the first flow blocking device (120) is arranged on the first connecting tube (110) and is located at a position close to the first end of the first connecting tube (110).

4. The blood connection tube according to claim 3, characterized in that, The second connecting pipeline (200) comprises: A second connecting tube (210), both the first end and the second end of the second connecting tube (210) are provided with second pipe joints (230); A second flow blocking device (220), the second flow blocking device (220) is arranged on the second connecting tube (210) and is located at a position close to the first end of the second connecting tube (210).

5. The blood connection tube according to claim 4, wherein The circulation control pipeline (500) comprises: The third connecting pipe (510), the first end of the third connecting pipe (510) is connected to the first connecting pipeline (100), and the connection point is located between the first end of the first connecting pipeline (100) and the first bypass pipeline (300), the second end of the third connecting pipe (510) is connected to the second connecting pipeline (200), and the connection point is located between the first end of the second connecting pipeline (200) and the second bypass pipeline (400); The third flow blocking device (520), the third flow blocking device (520) is arranged on the third connecting pipe (510).

6. The blood connection tube according to claim 5, characterized in that, The first bypass pipeline (300) includes: The fourth connecting pipe (310), the first end of the fourth connecting pipe (310) is communicated with the first connecting pipe (110), and the second end of the fourth connecting pipe (310) is provided with a third pipe joint (330) for connecting to the blood drawing end of the second blood treatment device (800); The fourth flow blocking device (320), the fourth flow blocking device (320) is arranged on the fourth connecting pipe (310).

7. The blood connection tube according to claim 6, characterized in that, The second bypass pipeline (400) includes: The fifth connecting pipe (410), the first end of the fifth connecting pipe (410) is communicated with the second connecting pipe (210), and the second end of the fifth connecting pipe (410) is provided with a fourth pipe joint (430) for connecting to the blood return end of the second blood treatment device (800); The fifth flow blocking device (420), the fifth flow blocking device (420) is arranged on the fifth connecting pipe (410).

8. The blood connection tube according to claim 7, wherein The first flow blocking device (120), the second flow blocking device (220), the third flow blocking device (520), the fourth flow blocking device (320) and the fifth flow blocking device (420) are Robert clamps.

9. The blood connection tube according to claim 7, wherein The first flow blocking device (120), the second flow blocking device (220), the third flow blocking device (520), the fourth flow blocking device (320) and the fifth flow blocking device (420) are two-way valves.

10. The blood connection tube according to claim 7, wherein, The first pipe joint (130), the second pipe joint (230), the third pipe joint (330) and the fourth pipe joint (430) are threaded joints or plug-in joints.

Images