Novel integrated multipurpose vena cava cannula

Abstract

The utility model provides a novel integrated multi-purpose vena cava cannula, which relates to the field of vena cava cannulas and comprises a pipeline, a coating component is arranged on the outer side of the pipeline, a drainage component is arranged in the pipeline, the coating component comprises a side hole, the side hole is arranged at the top end of the outer side of the pipeline, and the outer side of the pipeline is fixedly connected with a gradual change pipeline outlet. By means of the integrated design, retrograde brain protection perfusion of the upper body or retrograde perfusion of the inferior vena cava of the lower body is allowed to be carried out at the same time, the operation process is simplified, and the rescue efficiency is improved; according to the system, the operation risk is effectively controlled, great vessel rupture and organ injury caused by delayed establishment of extracorporeal circulation are reduced, and the risks of physical trauma and related complications in the operation are effectively reduced by reducing the number of pipelines needing to be implanted.

Description

Technical Field

[0001] The utility model relates to the field of vena cava cannula, in particular to a novel integrated multi-purpose vena cava cannula. Background Art

[0002] Total aortic arch replacement has been widely accepted as the main treatment for acute treatment of type A aortic arch dissection. However, deep hypothermic circulatory arrest during surgery, resulting in organ ischemia due to lack of blood perfusion in the descending aorta, is a serious challenge. In order to reduce the damage caused by ischemia, extracorporeal circulation and brain protection techniques are currently commonly used. A new technology, namely ACP (antegrade cerebral perfusion) combined with RIVP (retrograde inferior vena cava perfusion), has been proposed to address this challenge. In total aortic arch replacement surgery, this technology maintains blood supply to the lower body by simultaneously using ACP to perfuse the upper body and RIVP to perfuse the lower body, thereby reducing the risk of lower body ischemia.

[0003] When ACP combined with RIVP is used in total aortic arch replacement surgery, that is, when the descending aorta-artificial blood vessel is anastomosed, ACP is used to perfuse the upper body while RIVP is used to perfuse the lower body. At present, the extracorporeal circulation venous cannulation technology is divided into upper and lower vena cava cannulation and cavo-atrial cannulation. Upper and lower vena cava cannulation is mainly used as a channel for retrograde perfusion of the inferior vena cava in open heart surgery and lower body circulatory arrest surgery for large vessel surgery. The upper and lower vena cava need to be separated, and the operation time is long and traumatic, which prolongs the operation time of large vessel surgery. The cavo-atrial cannulation does not need to separate the upper and lower vena cava, and the extracorporeal circulation is quickly established by cannulation directly from the right atrium. It is mainly used for valve surgery (such as aortic valve surgery) and large vessel surgery that do not require opening the heart.

[0004] Although the vena cava cannula can quickly establish extracorporeal circulation, it cannot complete inferior vena cava retrograde perfusion (RIVP), thus failing to ensure that important organs in the lower body receive arterial blood perfusion. Therefore, a new integrated multi-purpose vena cava cannula is proposed. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and provide a novel integrated multi-purpose vena cava cannula.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a novel integrated multi-purpose vena cava cannula, comprising a pipeline, a covering component is arranged on the outside of the pipeline, and a drainage component is arranged inside the pipeline;

[0007] The covering component includes a side hole, which is opened on the top of the outer side of the pipe. The outer side of the pipe is connected to a gradual pipe outlet. The end of the retrograde perfusion tube away from the pipe is provided with a gradual pipe outlet. The bottom end of the pipe is provided with a connecting end, and the interior of the pipe is fixedly connected with a plurality of guide blocks.

[0008] As a preferred embodiment, the drainage assembly includes an airbag body, which is arranged between the guide block and the retrograde perfusion tube. The outer side of the airbag body is fixedly connected to an airbag connecting line, and the end of the airbag connecting line away from the airbag body is fixedly connected to a one-way valve two-way controller.

[0009] The technical effect of adopting the above further scheme is: it can not only quickly establish extracorporeal circulation, but also perform retrograde perfusion of the inferior vena cava during circulatory arrest, which can reduce surgical operation time and reduce trauma.

[0010] As a preferred embodiment, the diameter of the outlet of the gradient pipe is one quarter of the diameter of the retrograde perfusion pipe, and the diameter of the connecting end is one half of the pipe.

[0011] The technical effect of adopting the above further solution is that the connecting end is conveniently connected to the existing general medical pipeline, and the gradual pipeline outlet helps to provide more precise control of the liquid at the end of the pipeline.

[0012] As a preferred embodiment, the airbag connecting line passes through the side wall of the pipe and extends to the outside.

[0013] The technical effect of adopting the above further solution is that medical personnel can more easily control and adjust the inflation state of the airbag.

[0014] As a preferred implementation, the middle portion of the pipe bulges outward to form a cavity for accommodating the guide block.

[0015] The technical effect of adopting the above further solution is that the end with a larger diameter may be more suitable for drainage and help maintain blood flow.

[0016] As a preferred implementation, steel wire material is provided inside the pipe.

[0017] The technical effect of adopting the above further solution is that the steel wire material makes the cannula more directional, and the cannula can be more easily introduced into the target position even when the blood vessel is curved or there are obstacles.

[0018] Compared with the prior art, the advantages and positive effects of the utility model are:

[0019] By setting up a covering component and a drainage component, drugs or body fluids are delivered through a pipeline with a built-in steel wire to ensure smoothness and stability in the tortuous environment of the body. The side holes and the gradient pipeline outlet at the top of the pipeline are designed for precise release or absorption operations and control of flow, while the guide block optimizes the fluid dynamics to ensure the effective distribution and flow of the fluid in the pipeline. In addition, by controlling the inflation and deflation of the airbag and cooperating with the one-way valve bidirectional controller, the flow rate of the liquid can be accurately controlled. The integrated design allows brain protection perfusion of the upper body and retrograde perfusion of the inferior vena cava of the lower body to be performed simultaneously, which not only simplifies the operation process, but also responds faster at critical moments, effectively controls surgical risks, reduces large blood vessel rupture and organ damage caused by delayed establishment of extracorporeal circulation, and effectively reduces the risk of physical trauma and related complications during surgery by reducing the number of pipelines that need to be implanted. Fewer incisions and puncture points reduce the patient's bleeding, and also reduce the risk of postoperative pain and infection, thereby speeding up the patient's recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A stereoscopic diagram of a novel integrated multi-purpose vena cava cannula provided by the utility model;

[0021] Figure 2 A cross-sectional view of a novel integrated multi-purpose vena cava cannula provided by the utility model;

[0022] Figure 3 for Figure 2 Enlarged view of point A in .

[0023] Legend:

[0024] 1. Pipeline; 2. Covering assembly; 21. Side hole; 22. Retrograde perfusion tube; 23. Gradient pipeline outlet; 24. Connecting end; 25. Guide block; 3. Drainage assembly; 31. Airbag body; 32. Airbag connecting line; 33. One-way valve two-way controller. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1 - Figure 2As shown, this embodiment provides a technical solution: a novel integrated multi-purpose vena cava cannula, comprising a pipeline 1, a sheathing component 2 is arranged on the outside of the pipeline 1, the sheathing component 2 comprises a side hole 21, the side hole 21 is opened on the top of the outside of the pipeline 1, the outside of the pipeline 1 is connected with a gradual pipeline outlet 23, the end of the retrograde perfusion tube 22 away from the pipeline 1 is provided with a gradual pipeline outlet 23, the bottom end of the pipeline 1 is provided with a connecting end 24, a plurality of guide blocks 25 are fixedly connected to the inside of the pipeline 1, the diameter of the gradual pipeline outlet 23 is one quarter of the diameter of the retrograde perfusion tube 22, the diameter of the connecting end 24 is one half of the pipeline 1, the diameter of the end of the pipeline 1 close to the guide block 25 is larger than the diameter of the side of the pipeline 1 close to the side hole 21, the inside of the pipeline 1 is provided with a steel wire material, the pipeline 1 is the main delivery pipeline, which allows pipeline 1 to remain unobstructed and stable even in a tortuous environment in the body. The side hole 21 is designed at the top of pipeline 1 for insertion into the inferior vena cava end, which can be released or absorbed at different positions. The retrograde perfusion tube 22 is used for retrograde injection, and is connected to a hollow lumen made of polymer material, which is wrapped around the central pipeline 1 in actual use. This design allows injection into the target area from different directions, increasing the flexibility of operation. The gradient pipeline outlet 23 is designed to be one-fourth the size of pipeline 1. This gradient design helps to provide more precise control at the end of pipeline 1, for example, more precise control of the liquid volume during drug delivery or body fluid extraction. The connection end 24 interface is one-half, which can be easily connected to the existing general medical pipeline 1. This standardized design makes the device compatible with a variety of medical systems, easy to integrate and replace, and the guide block 25 is designed at the front end of the pipeline 1 to achieve the drainage effect;

[0027] like Figure 2 and Figure 3 As shown: a drainage component 3 is arranged inside the pipeline 1, and the drainage component 3 includes an airbag body 31, which is arranged between the guide block 25 and the retrograde perfusion tube 22. The airbag body 31 is fixedly connected with an airbag connecting line 32, and the airbag connecting line 32 passes through the side wall of the pipeline 1 and extends to the outside. The end of the airbag connecting line 32 away from the airbag body 31 is fixedly connected with a one-way valve two-way controller 33. The airbag body 31 can be inflated or deflated through the airbag connecting line 32 on one side. The airbag body 31 can be used to temporarily close or the space inside the pipeline 1 to facilitate retrograde perfusion through the side hole of the retrograde perfusion tube 22. The one-way valve two-way controller 33 is used to control the inflation and deflation of the airbag. Such a design can ensure that the airbag body 31 responds quickly when needed and provides necessary functional support.

[0028] Working principle:

[0029] like Figure 1 - Figure 3 As shown:

[0030] When in use: First, the pipeline 1 is used as the main delivery channel. The steel wire material inside it ensures smoothness and stability in the tortuous environment of the body. The side hole 21 is located at the top of the pipeline 1, which is used for accurate release or absorption operations at the inferior vena cava end. At the same time, the retrograde perfusion tube 22 is set at the end of the pipeline 1 away from the connecting end 24. Its size is about one-fourth of the diameter of the pipeline 1. This structure helps to accurately control the flow during drug delivery or body fluid extraction. Then, the flow inside the pipeline 1 is guided by the guide block 25, which optimizes the fluid dynamics and ensures the effective distribution and stable flow of the fluid in the pipeline 1. In addition, the connecting end 24 is designed to be one-half of the pipeline 1, which is compatible with the existing medical system interface and realizes rapid integration and simple replacement. Finally, the balloon connecting line 32 controls the balloon body 31 to inflate or deflate, and cooperates with the one-way valve two-way controller 33 to achieve temporary closure or expansion of the space in the pipeline 1, thereby accurately controlling the flow rate of the liquid or stabilizing the position of the pipeline 1.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A novel integrated multi-purpose vena cava cannula, comprising a pipeline (1), characterized in that: A covering component (2) is arranged on the outside of the pipeline (1), and a drainage component (3) is arranged on the inside of the pipeline (1); The covering component (2) comprises a side hole (21), the side hole (21) being provided on the top end of the outer side of the pipeline (1), the outer side of the pipeline (1) being connected to a retrograde perfusion tube (22), the end of the retrograde perfusion tube (22) being provided with a pipeline outlet (23) away from the pipeline (1), the bottom end of the pipeline (1) being provided with a connecting end (24), and the interior of the pipeline (1) being fixedly connected with a plurality of guide blocks (25).

2. The novel integrated multi-purpose vena cava cannula according to claim 1 is characterized in that: The drainage assembly (3) comprises an airbag body (31), the airbag body (31) being arranged between the guide block (25) and the retrograde perfusion tube (22), the outer side of the airbag body (31) being fixedly connected to an airbag connecting line (32), and one end of the airbag connecting line (32) away from the airbag body (31) being fixedly connected to a one-way valve two-way controller (33).

3. The novel integrated multi-purpose vena cava cannula according to claim 1 is characterized in that: The diameter of the pipeline outlet (23) is one quarter of the diameter of the retrograde perfusion tube (22), and the diameter of the connecting end (24) is one half of the diameter of the pipeline (1).

4. The novel integrated multi-purpose vena cava cannula according to claim 2 is characterized in that: The airbag connection line (32) passes through the side wall of the pipe (1) and extends outward.

5. The novel integrated multi-purpose vena cava cannula according to claim 1 is characterized in that: The middle part of the pipeline (1) protrudes outward to form a cavity for accommodating a guide block (25).

6. The novel integrated multi-purpose vena cava cannula according to claim 1 is characterized in that: Steel wire material is arranged inside the pipe (1).

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