Totally-closed hemodialysis external circulation pipeline

Abstract

The utility model provides a fully-closed hemodialysis external circulation pipeline, and relates to the technical field of medical equipment. The circulating pipeline comprises an artery blood drawing tube and a vein blood returning tube; the artery blood drawing tube comprises an artery main tube, and a first artery side tube, a second artery side tube and an artery jug which are communicated with the artery main tube; the vein blood return tube comprises a vein main tube and a first vein pot communicated with the vein main tube; the vein main tube is sequentially connected with a first vein side tube, a second vein side tube and a third vein side tube; the first artery side tube is communicated with the second vein side tube, and the second artery side tube is used for supplying normal saline; vascular clamps are arranged at the port of the vein main tube, the first vein side tube, the first artery side tube, the vein main tube between the second vein side tube and the third vein side tube, the third vein side tube, the port of the artery guide tube and the second artery side tube. The circulation pipeline does not cause environmental pollution and patient blood loss under the condition of closed blood leading, and blood sample collection can be completed.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a fully enclosed hemodialysis external circulation pipeline. Background Art

[0002] Currently, during hemodialysis, patients commonly use central venous catheters and arteriovenous fistulas for vascular access. When using a central venous catheter for dialysis, a syringe is used to withdraw the sealing fluid from the catheter before connecting to the machine. The fluid is then injected onto gauze to check for clots (the injection distance should be >10 cm from the gauze). The withdrawal volume is approximately 2 ml for each arterial and venous line. This method can easily cause blood splatter, which can generate aerosols and spread infectious diseases. Furthermore, when blood samples are collected from patients in clinical practice, 10 ml of blood must be drawn and discarded before the blood sample is sent for testing. Utility Model Content

[0003] The present application provides a fully enclosed hemodialysis external circulation pipeline, which does not cause environmental pollution or patient blood loss under closed blood extraction conditions and can complete blood sample collection.

[0004] This application is implemented as follows:

[0005] The present application provides a fully enclosed hemodialysis external circulation circuit, comprising: an arterial inlet tube and a venous return tube; the arterial inlet tube comprises an arterial main tube, a first arterial side tube connected to the arterial main tube, a second arterial side tube, and an arterial pot; the venous return tube comprises a venous main tube and a first venous pot connected to the venous main tube;

[0006] From the port of the main venous tube to the first venous pot, the main venous tube is sequentially connected to a first venous side tube, a second venous side tube, and a third venous side tube; the first arterial side tube is connected to the second venous side tube, the third venous side tube is used to discharge waste fluid, and the second arterial side tube is used to supply physiological saline;

[0007] The port of the main venous tube, the first venous side tube, the first arterial side tube, the main venous tube located between the second venous side tube and the third venous side tube, the third venous side tube, the port of the arterial access tube, and the second arterial side tube are all provided with vascular clamps.

[0008] In a possible embodiment, the arterial pot is connected to the first venous pot through a first blood vessel, and the first blood vessel and the main venous pipe between the third venous side tube and the first venous pot are both provided with a vascular clamp.

[0009] In a possible embodiment, a second venous pot is further included, wherein the first blood vessel includes a first section connected to the arterial pot and a second section connected to the venous pot, the first section is connected to the second section, and the second section is provided with the vascular clamp; the main venous body includes a first main body and a second main body that are connected, the second main body is connected to the first venous pot, and the second main body is provided with the vascular clamp; one end of the second venous pot is connected to the first section through the second blood vessel, and the other end is connected to the first main body through the third blood vessel, and both the second blood vessel and the third blood vessel are provided with vascular clamps.

[0010] In a possible embodiment, the first arterial side tube is connected to the first venous side tube through a threaded tube.

[0011] In a possible embodiment, the second arterial side tube is connected to a physiological saline solution supply device.

[0012] In a possible embodiment, the third venous side tube is connected to a waste fluid bag.

[0013] In a possible embodiment, the port of the waste fluid bag is provided with a vascular clamp.

[0014] The embodiments of the present application have at least the following beneficial effects:

[0015] The fully enclosed hemodialysis external circulation circuit of the present application does not cause environmental pollution or patient blood loss under the condition of closed blood extraction; moreover, there is no need to discard 10ml of blood when collecting blood samples, and blood sample collection can be completed directly in the first venous side tube of the circulation circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of a fully enclosed hemodialysis external circulation circuit according to an embodiment of the present application.

[0018] Icons: 10-Fully enclosed hemodialysis external circulation circuit; 11-Arterial inlet tube; 111-Arterial main tube; 112-First arterial side tube; 113-Second arterial side tube; 114-Arterial pot; 12-Venous return tube; 121-Venous main tube; 1211-First main tube; 1212-Second main tube; 122-First venous pot; 123-First venous side tube; 124-Second venous side tube; 125-Third venous side tube; 126-Second venous pot; 13-Vascular clamp; 151-First blood vessel; 152-Second blood vessel; 153-Third blood vessel; 161-Waste liquid bag. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0021] In the description of this application, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Example

[0023] A fully enclosed hemodialysis external circulation pipeline 10, please refer to Figure 1The device comprises an arterial access tube 11 and a venous return tube 12. The arterial access tube 11 comprises a main arterial tube 111, a first arterial side tube 112 connected to the main arterial tube 111, a second arterial side tube 113, and an arterial pot 114. The second arterial side tube 113 is used to supply physiological saline for priming and closed blood return. The second arterial side tube 113 is connected to a physiological saline supply device for supplying physiological saline to the second arterial side tube 113.

[0024] The venous return blood vessel 12 includes a main venous tube 121 and a first venous pot 122 connected to the main venous tube 121; from the port of the main venous tube 121 to the first venous pot 122, the main venous tube 121 is sequentially connected to a first venous side tube 123, a second venous side tube 124 and a third venous side tube 125.

[0025] The first arterial side tube 112 is connected to the second venous side tube 124. Exemplarily, the first arterial side tube 112 is connected to the second venous side tube 124 via a threaded tube. It is understood that the first arterial side tube 112 and the second venous side tube 124 can also be connected in other ways, such as via a plug connector.

[0026] The third venous side tube 125 is used to discharge waste liquid. For example, the third venous side tube 125 is connected to a waste liquid bag 161 to facilitate the treatment of the waste liquid. For example, a vascular clamp 13 is provided at the end of the waste liquid bag 161.

[0027] In addition, the port of the main venous tube 121, the first venous side tube 123, the first arterial side tube 112, the main venous tube 121 located between the second venous side tube 124 and the third venous side tube 125, the third venous side tube 125, the port of the arterial access tube 11, and the second arterial side tube 113 are all provided with a vascular clamp 13.

[0028] During use, when priming the pipeline, all the above-mentioned vascular clamps are opened, and physiological saline is supplied to the second arterial side tube 113. After the priming is completed, the vascular clamp 13 on the first venous side tube 123 is closed.

[0029] When blood drawing begins, first clamp the vascular clamp 13 at the port of the arterial access tube 11, then open the vascular clamp 13 on the port of the main venous tube 121 and the vascular clamp 13 on the first arterial side tube 112. At the same time, close the vascular clamp 13 on the port of the main venous tube 121 located between the second venous side tube 124 and the third venous side tube 125. Blood will be drawn from the port of the patient's central venous main tube 121, and small blood clots in the catheter will be discharged. When the blood is drawn to the arterial thrombus 114, the blood pump is paused. If the patient needs blood collection, blood can be collected from the first venous side tube 123 at this time. When collecting a blood sample, there is no need to discard 10ml of blood; the blood sample can be collected directly from the first venous side tube 123 of the circulation pipeline.

[0030] After blood collection is completed, the vascular clamp 13 on the port of the main venous tube 121 and the vascular clamp 13 on the first venous side tube 123 are closed, and the vascular clamp 13 on the port of the arterial lead tube 11 and the vascular clamp 13 on the main venous tube 121 located between the second venous side tube 124 and the third venous side tube 125 are opened. When the blood in the first arterial side tube 112 and the second venous side tube 124 is flushed clean with saline, the vascular clamp 13 on the first arterial side tube 112 and the vascular clamp 13 on the main venous tube 121 located between the second venous side tube 124 and the third venous side tube 125 are clamped. When the blood reaches the outlet of the third venous side tube 125, the blood pump is stopped, the vascular clamp 13 on the third venous side tube 125 and the vascular clamp 13 at the end of the waste liquid bag 161 are clamped, the waste liquid bag 161 is discarded, and the vascular clamp 13 at the end of the main venous tube 121 and the vascular clamp 13 on the main venous tube 121 located between the second venous side tube 124 and the third venous side tube 125 are opened. The blood pump is turned on to complete the closed machine process. The fully closed hemodialysis external circulation pipeline 10 of the present application does not cause environmental pollution or patient blood loss under the condition of closed blood withdrawal.

[0031] The arterial pot 114 is connected to the first venous pot 122 through the first blood vessel 151. The first blood vessel 151 and the main venous pipe 121 located between the third venous side tube 125 and the first venous pot 122 are both provided with a vascular clamp 13; the setting of the vascular clamp 13 here can prevent blood from entering the first venous pot 122.

[0032] During hemodialysis, a hypercoagulable state caused by various factors, including contact between blood and tubing and dialyzer surfaces, can lead to platelet adhesion and activation of both endogenous and exogenous coagulation pathways, resulting in extracorporeal coagulation. Extracorporeal coagulation is a common complication of hemodialysis, with reported incidence rates of 0.7% to 6.9% internationally and 2.3% to 19.2% in China. Once extracorporeal coagulation occurs, patients can lose 150 to 200 mL of blood, forcing them to shorten treatment time, reduce dialysis effectiveness, and potentially lead to medical disputes. Existing venous traps in extracorporeal circuits are typically equipped with filters to prevent thrombi from returning to the patient. However, these filters are particularly prone to thrombi depositing in these areas. Furthermore, the venous traps are located close to the blood return port. When coagulation is severe and the trap becomes completely blocked, blood cannot be returned to the patient, forcing the approximately 200 mL of blood to be discarded.

[0033] In order to improve this problem, the fully enclosed hemodialysis external circulation circuit 10 of this embodiment further includes a second venous pot 126, the first blood vessel 151 includes a first section connected to the arterial pot 114 and a second section connected to the first venous pot 122, the first section is connected to the second section, and the second section is provided with a vascular clamp 13; the venous main pipe 121 includes a connected first main pipe 1211 and a second main pipe 1212, the second main pipe 1212 is connected to the first venous pot 122, and the second main pipe 1212 is provided with a vascular clamp 13; one end of the second venous pot 126 is connected to the first section through the second blood vessel 152, and the other end is connected to the first main pipe 1211 through the third blood vessel 153, and both the second blood vessel 152 and the third blood vessel 153 are provided with a vascular clamp 13.

[0034] During use, all vascular clamps are opened, and after the priming with normal saline is completed, the vascular clamps 13 on the first venous side tube 123, the second blood vessel 152, and the third blood vessel 153 are closed. During dialysis treatment, if thrombosis occurs in the first venous pot 122 and subsequent treatment cannot be completed, the vascular clamps 13 at both ends of the first venous pot 122 can be clamped, and the vascular clamps 13 at both ends of the second venous pot 126 can be opened to allow blood to pass through the second venous pot 126, thereby completing subsequent hemodialysis treatment while reducing blood loss in the patient.

[0035] The fully enclosed hemodialysis external circulation circuit 10 of the present application does not cause environmental pollution or patient blood loss under the condition of closed blood extraction; moreover, there is no need to discard 10 ml of blood when collecting blood samples, and blood sample collection can be completed directly in the first venous side tube 123 of the circulation circuit; in addition, if blood clots appear in the first venous pot 122 during treatment, the second venous pot 126 can be used to continue treatment, avoiding waste of patient blood.

[0036] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A fully enclosed hemodialysis external circulation circuit, characterized in that: include: An arterial supply vessel and a venous return vessel; the arterial supply vessel includes an arterial main tube, a first arterial side tube connected to the arterial main tube, a second arterial side tube, and an arterial pot; the venous return vessel includes a venous main tube and a first venous pot connected to the venous main tube; From the port of the main venous tube to the first venous pot, the main venous tube is sequentially connected to a first venous side tube, a second venous side tube, and a third venous side tube; the first arterial side tube is connected to the second venous side tube, the third venous side tube is used to discharge waste fluid, and the second arterial side tube is used to supply physiological saline; The port of the main venous tube, the first venous side tube, the first arterial side tube, the main venous tube located between the second venous side tube and the third venous side tube, the third venous side tube, the port of the arterial access tube, and the second arterial side tube are all provided with vascular clamps.

2. The fully enclosed hemodialysis external circulation circuit according to claim 1, characterized in that: The arterial pot is communicated with the first venous pot through a first blood vessel, and the first blood vessel and the main venous pipe between the third venous side tube and the first venous pot are both provided with a vascular clamp.

3. The fully enclosed hemodialysis external circulation circuit according to claim 2, characterized in that: It also includes a second venous pot, the first blood vessel includes a first section connected to the arterial pot and a second section connected to the venous pot, the first section is connected to the second section, and the second section is provided with the vascular clamp; the venous main pipe includes a first main pipe and a second main pipe that are connected, the second main pipe is connected to the first venous pot, and the second main pipe is provided with the vascular clamp; one end of the second venous pot is connected to the first section through the second blood vessel, and the other end is connected to the first main pipe through the third blood vessel, and both the second blood vessel and the third blood vessel are provided with vascular clamps.

4. The fully enclosed hemodialysis external circulation circuit according to any one of claims 1 to 3, characterized in that: The first arterial side tube is communicated with the first venous side tube through a threaded tube.

5. The fully enclosed hemodialysis external circulation circuit according to any one of claims 1 to 3, characterized in that: The second arterial side tube is connected to a physiological saline solution supply device.

6. The fully enclosed hemodialysis external circulation circuit according to any one of claims 1 to 3, characterized in that: The third venous side tube is connected to a waste liquid bag.

7. The fully enclosed hemodialysis external circulation circuit according to claim 6, characterized in that: The port of the waste liquid bag is provided with a blood vessel clamp.

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