Left heart drainage tube for extracorporeal circulation surgery

Abstract

The utility model discloses a left heart drainage tube for extracorporeal circulation surgery, which comprises a tube body consisting of an outer tube and an inner tube, a limiting balloon and a plurality of supporting balloons, the limiting balloon and the plurality of supporting balloons are sleeved at the front end of the outer tube, and the limiting balloon and the plurality of supporting balloons are communicated through a circulation tube. The limiting balloon and the supporting balloons can be inflated synchronously after being filled with fluid through the runner pipe; the inner tube is arranged in an inner cavity of the outer tube, a fluid gap is formed between the front end of the outer tube and the front end of the inner tube, a plurality of hole channels distributed between every two adjacent supporting balloons are formed in the surface of the inner tube and the surface of the outer tube, and the hole channels communicate with the fluid gap. Meanwhile, the inner tube is arranged in the outer tube and does not make direct contact with the wall of the blood vessel, when the inner tube is in negative pressure, the flow channel in the inner tube cannot adsorb the wall of the blood vessel, and therefore the possibility that the inner wall of the blood vessel adheres to the drainage tube is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage tubes, and particularly relates to a left heart drainage tube for extracorporeal circulation surgery. Background Art

[0002] The left atrial drainage tube is one of the essential intubation tubes in open heart surgery. During the operation, the surgeon inserts it into the patient's left atrium through the atrial septal hole or the right superior pulmonary vein, and connects it to a roller pump to suck the left heart return blood into the blood storage tank. If the left heart return blood can be completely sucked, it is beneficial to create a good surgical field, shorten the operation time, improve the operation quality, and play the role of left heart decompression and exhaust.

[0003] Currently, during pediatric open heart surgery, the drainage tube is mainly limited in the blood vessel by the balloon fixation method. Although this method can play the role of drainage, the inner cavity of the drainage tube is in a negative pressure state. On the one hand, the drainage end of the drainage tube under negative pressure has a strong adsorption force, and on the other hand, there is also a certain negative pressure inside the drainage tube. During drainage, the front end with adsorption force is prone to adhere to the inner wall of the blood vessel, and the liquid inlet hole of the drainage tube is wrapped by atrial wall tissue, resulting in the problem of blockage of the liquid inlet hole. At the same time, the inside of the drainage tube is also prone to being squeezed and flattened, resulting in blockage. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a left heart drainage tube for extracorporeal circulation surgery to solve the technical problems in the existing device.

[0005] To solve the above technical problems, the utility model specifically provides the following technical solution: A left heart drainage tube for extracorporeal circulation surgery includes a tube body composed of an outer tube and an inner tube, a limiting balloon, and several supporting balloons. The limiting balloon and several supporting balloons are all sleeved at the front end of the outer tube. The limiting balloon and several supporting balloons are all connected by the same circulation tube, and the limiting balloon and several supporting balloons can be inflated synchronously after filling the fluid through the circulation tube.

[0006] The inner tube is placed in the inner cavity of the outer tube. There is a fluid gap between the front end of the outer tube and the front end of the inner tube. Several holes are provided on the surfaces of the inner tube and the outer tube, and these holes are distributed between adjacent two supporting balloons. Several holes are all communicated with the fluid gap, so as to drain the blood at the outer tube to the inner tube through the holes under the action of negative pressure under the support of the supporting balloons on the blood vessel wall.

[0007] As a preferred scheme of the utility model, the inner tube includes a tube body and a tube head. The tube body is connected to the tube head. The diameter of the tube body is the same as the inner diameter of the outer tube, and the diameter of the tube head is smaller than the inner diameter of the outer tube. The holes are distributed on the tube head.

[0008] As a preferred solution of the utility model, the tube head is arranged in a bullet shape, and the tip of the tube head is connected and fixed to the inner wall of the outer tube.

[0009] As a preferred solution of the utility model, the diameter of the limiting balloon is larger than the diameter of the supporting balloon. The small-diameter supporting balloon will not expand the blood vessel over a large area, but only serves to avoid adsorption and adhesion between the blood vessel wall and the outer tube.

[0010] As a preferred solution of the utility model, the circulation tube is arranged in the inner cavity of the tube wall of the outer tube, one end of the circulation tube extends out of the outer tube and is connected to an external device, and the other end is respectively connected to the limiting balloon and several supporting balloons.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The device can fix the entire drainage tube in the blood vessel through the limiting balloon, reducing the possibility of the drainage tube slipping out of the blood vessel. At the same time, the inner tube is placed in the outer tube, and the inner tube does not directly contact the blood vessel wall. When the inner tube is under negative pressure, the flow channel in the inner tube will not adsorb the blood vessel wall, thereby avoiding the possibility of adhesion between the inner wall of the blood vessel and the drainage tube. The setting of the supporting balloon can not only avoid the adsorption of the outer tube and the blood vessel wall, but also avoid the possibility of blockage of the inner tube due to the collapse of the inner tube itself due to negative pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 For the utility model Figure 1 Schematic diagram of the overall structure section;

[0016] Figure 3 For the utility model Figure 2 Schematic diagram of the structure of part A;

[0017] Figure 4 For the utility model Figure 1 Schematic diagram of partial structural section;

[0018] The numbers in the figure represent the following:

[0019] 1. Outer tube; 2. Inner tube; 21. Tube body; 22. Tube head; 3. Limiting balloon; 4. Supporting balloon; 5. Flow tube; 6. Fluid gap; 7. Channel. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figures 1-4 As shown, a left heart drainage tube for extracorporeal circulation surgery includes a tube body composed of an outer tube 1 and an inner tube 2, a limiting balloon 3 and a plurality of supporting balloons 4. The limiting balloon 3 and the plurality of supporting balloons 4 are both sleeved on the front end of the outer tube 1. The limiting balloon 3 and the plurality of supporting balloons 4 are all connected through the same circulation tube 5. The limiting balloon 3 and the plurality of supporting balloons 4 can be expanded synchronously after being filled with fluid through the circulation tube 5.

[0022] The inner tube 2 is placed in the inner cavity of the outer tube 1, and a fluid gap 6 is provided between the front ends of the outer tube 1 and the inner tube 2. The surfaces of the inner tube 2 and the outer tube 1 are provided with a plurality of channels 7 distributed between two adjacent supporting balloons 4, and the plurality of channels are connected to the fluid gap 6, so that the blood in the outer tube 1 can be drained into the inner tube 2 through the channels 7 by negative pressure under the action of the supporting balloon 4 supporting the blood vessel wall.

[0023] The diameter of the limiting balloon is larger than the diameter of the blood vessel incision, so the limiting balloon can be fixed in the blood vessel after expansion.

[0024] The device can fix the entire drainage tube in the blood vessel through the limiting balloon, reducing the possibility of the drainage tube slipping out of the blood vessel. At the same time, the inner tube is placed in the outer tube, and the inner tube does not directly contact the blood vessel wall. When the inner tube is under negative pressure, the flow channel in the inner tube will not adsorb the blood vessel wall, thereby avoiding the possibility of adhesion between the inner wall of the blood vessel and the drainage tube. The setting of the supporting balloon can not only avoid the adsorption of the outer tube and the blood vessel wall, but also avoid the possibility of blockage of the inner tube due to the collapse of the inner tube itself due to negative pressure.

[0025] Specifically, Figures 1-3 As shown, the inner tube 2 includes a tube body 21 and a tube head 22, the tube body 21 is connected to the tube head 22, the diameter of the tube body 21 is the same as the inner diameter of the outer tube 1, the diameter of the tube head 22 is smaller than the inner diameter of the outer tube 1, and the channels 7 are distributed on the tube head 22.

[0026] Further, such as Figures 2-3 As shown, the tube head 22 is configured in a bullet shape, and the tip of the tube head 22 is connected and fixed to the inner wall of the outer tube 1 .

[0027] A fluid gap 6 is formed between the tube head 22 and the inner wall of the outer tube 1. The fluid gap 6 is mainly for the flow of blood. The bullet-shaped tube head 22 forms a structure with one end higher and the other end lower. Such a structure facilitates the concentration of blood at the lower end, that is, the blood will gather at the tip of the tube head 22 of the inner tube 2, thus facilitating the discharge of blood from the channel 7 in the tube head 22.

[0028] Specifically, as Figures 1-4 shown, the diameter of the limiting balloon 3 is larger than the diameter of the supporting balloon 4. The small-diameter supporting balloon 4 will not expand the blood vessel over a large area, but only serves to prevent the adsorption and adhesion between the blood vessel wall and the outer tube 1.

[0029] Furthermore, as Figures 1-4 shown, the flow pipe 5 is arranged in the inner cavity of the tube wall of the outer tube 1. One end of the flow pipe 5 extends out of the outer tube 1 and is connected to an external device, and the other end is respectively connected to the limiting balloon 3 and several supporting balloons 4.

[0030] The flow pipe 5 does not contact the channel 7 to avoid interfering with the distribution of the channel 7. The flow pipe 5 can communicate with the limiting balloon 3 and several supporting balloons 4 respectively through branch pipes. The specific connection method will not be elaborated here.

[0031] The external device can be a device for injecting liquid, such as a syringe, etc.

[0032] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A left heart drainage tube for extracorporeal circulation surgery, characterized in that: The invention comprises a tube body composed of an outer tube (1) and an inner tube (2), a limiting balloon (3) and a plurality of supporting balloons (4); the limiting balloon (3) and the plurality of supporting balloons (4) are both sleeved on the front end of the outer tube (1); the limiting balloon (3) and the plurality of supporting balloons (4) are both connected through the same circulation tube (5); the limiting balloon (3) and the plurality of supporting balloons (4) can be expanded synchronously after being filled with fluid through the circulation tube (5); The inner tube (2) is placed in the inner cavity of the outer tube (1), and a fluid gap (6) is provided between the front ends of the outer tube (1) and the inner tube (2). The surfaces of the inner tube (2) and the outer tube (1) are provided with a plurality of channels (7) distributed between two adjacent support balloons (4), and the plurality of channels are connected to the fluid gap (6), so that the blood in the outer tube (1) can be drained into the inner tube (2) through the channels (7) under the action of negative pressure when the support balloon (4) supports the blood vessel wall.

2. A left heart drainage tube for extracorporeal circulation surgery according to claim 1, characterized in that: The inner tube (2) comprises a tube body (21) and a tube head (22), the tube body (21) and the tube head (22) being connected, the diameter of the tube body (21) being the same as the inner diameter of the outer tube (1), the diameter of the tube head (22) being smaller than the inner diameter of the outer tube (1), and the channels (7) being distributed on the tube head (22).

3. A left heart drainage tube for extracorporeal circulation surgery according to claim 2, characterized in that: The tube head (22) is arranged in a bullet-shaped shape, and the tip of the tube head (22) is connected and fixed to the inner wall of the outer tube (1).

4. A left heart drainage tube for extracorporeal circulation surgery according to claim 1, characterized in that: The diameter of the limiting balloon (3) is larger than the diameter of the supporting balloon (4). The supporting balloon (4) with a small diameter will not expand the blood vessel over a large area, but only serves to prevent adsorption and adhesion between the blood vessel wall and the outer tube (1).

5. A left heart drainage tube for extracorporeal circulation surgery according to claim 1, characterized in that: The circulation tube (5) is arranged in the inner cavity of the tube wall of the outer tube (1), one end of the circulation tube (5) extends out of the outer tube (1) and is connected to an external device, and the other end is respectively connected to the limiting balloon (3) and a plurality of supporting balloons (4).

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