Anti-falling ECMO arterial cannula with far-end perfusion hole

Abstract

The utility model discloses an anti-falling ECMO arterial cannula with a far-end perfusion hole, and relates to the technical field of medical instruments. An operating cavity is formed in the inner side of the cannula body, an acting spring is arranged on the inner side of the operating cavity, a connecting ring is fixedly connected to the inner wall of the lower side of the operating cavity, the lower end of the acting spring is fixedly connected to the upper end of the connecting ring, the upper end of the acting spring abuts against the inner wall of the upper side of the operating cavity, and a plurality of pull ropes are fixedly connected to the upper end of the connecting ring. The end, away from the connecting ring, of the pull rope extends to the position above the operation cavity, penetrates through the side wall of the cannula body and extends to the outer side of the cannula body. During use, when the pull ropes are tightened, the acting spring is compressed, at the moment, the inner side wall of the operation cavity is in a natural state, the outer side wall of the operation cavity protrudes, the protruding outer side wall of the operation cavity is used for preventing the cannula body from falling off, and by means of the mode, discomfort cannot be brought to the skin of a patient; and meanwhile, the problem of infirm fixation caused by skin sweat of the patient is solved, so that the problem of release of the cannula main body is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an ECMO arterial cannula that is resistant to detachment and has a built-in distal perfusion port. Background Technology

[0002] Arterial cannulation is a medical procedure in which a catheter is inserted into the arterial system through a vascular sheath. It is an essential procedure for ECMO treatment.

[0003] During arterial cannulation, various factors can lead to cannula loosening. Furthermore, during prolonged cardiopulmonary bypass or certain treatments, patients may experience lower limb ischemia. This is because the arterial cannula may block blood supply to the lower limbs, leading to ischemia and necrosis. To address this issue, it is often necessary to add a distal perfusion cannula for active blood supply. However, current procedures typically require inserting the distal perfusion cannula into the femoral artery, which usually necessitates re-puncture of the vessel, causing additional pain and harm to the patient.

[0004] Therefore, this application proposes an arterial cannula with a built-in distal perfusion side hole to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an ECMO arterial cannula that is resistant to dislodgement and has a built-in distal perfusion port, thus solving the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an ECMO arterial cannula with anti-dislodgement and a built-in distal perfusion port, comprising a cannula body, an operating chamber provided on the inner side of the cannula body, an action spring provided on the inner side of the operating chamber, a connecting ring fixedly connected to the lower inner wall of the operating chamber, the lower end of the action spring fixedly connected to the upper end of the connecting ring, the upper end of the action spring abutting against the upper inner wall of the operating chamber, a plurality of pull ropes fixedly connected to the upper end of the connecting ring, the end of the pull rope away from the connecting ring extending above the operating chamber, passing through the side wall of the cannula body, and extending to the outer side of the cannula body, an perfusion port being provided on the side wall of the cannula body, the perfusion port being located below the operating chamber.

[0007] Preferably, the natural length of the outer sidewall of the operating cavity is greater than the natural length of the inner sidewall of the operating cavity.

[0008] Preferably, the upper end of the pull rope is located outside the blood vessel, and the operating cavity is located inside the blood vessel.

[0009] Compared with related technologies, the ECMO arterial cannula provided by this utility model, which is resistant to dislodgement and has a built-in distal perfusion port, has the following beneficial effects:

[0010] This invention provides an ECMO arterial cannula with anti-dislodgement and a built-in distal perfusion port. The cannula body has a perfusion port on its side wall. When lower limb ischemia occurs during treatment, the distal perfusion cannula extends into the femoral artery through this port, thus providing blood supply to the lower limb. This solves the problem of traditional distal perfusion cannulas requiring re-puncture, causing additional pain and harm to the patient. An operating cavity is provided within the cannula body, with the outer wall of the operating cavity naturally longer than the inner wall. When the spring naturally springs open within the operating cavity, the outer wall of the operating cavity is in a relaxed state, while the inner wall is stretched. During use, when tightened using several pull ropes, the spring is compressed. At this time, the inner wall of the operating cavity is in a relaxed state, and the outer wall of the operating cavity protrudes. This protrusion prevents dislodgement of the cannula body. This method not only avoids discomfort to the patient's skin but also prevents instability caused by sweat, effectively solving the problem of cannula dislodgement. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0013] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0014] Figure 4 This is a schematic diagram of the position structure of the pull rope and the actuating spring of this utility model;

[0015] Figure 5 This is a schematic diagram illustrating the formation of the anti-detachment structure of this utility model;

[0016] Figure 6 This is a schematic diagram of the cannula body of this utility model in use.

[0017] In the diagram: 1. Intubation body; 2. Operating chamber; 3. Connecting ring; 4. Actuating spring; 5. Pull rope; 6. Blood vessel; 7. Irrigation port. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-6This utility model provides a technical solution: an ECMO arterial cannula with anti-dislodgement and a built-in distal perfusion port, comprising a cannula body 1, an operating chamber 2 disposed on the inner side of the cannula body 1, an action spring 4 disposed on the inner side of the operating chamber 2, a connecting ring 3 fixedly connected to the lower inner wall of the operating chamber 2, the lower end of the action spring 4 fixedly connected to the upper end of the connecting ring 3, the upper end of the action spring 4 abutting against the upper inner wall of the operating chamber 2, and a plurality of pull ropes 5 fixedly connected to the upper end of the connecting ring 3, the end of the pull ropes 5 away from the connecting ring 3 extending to the top of the operating chamber 2, passing through the side wall of the cannula body 1, and extending to the outside of the cannula body 1. When in use, pulling the rope 5 causes the connecting ring 3 to move upward by pulling several ropes 5, and when the spring 4 is compressed, the outer wall of the operating cavity 2 protrudes. The protruding outer wall of the operating cavity 2 prevents the cannula body 1 from falling off. This method not only avoids causing discomfort to the patient's skin, but also avoids the problem of instability caused by the patient's sweat, thus effectively solving the problem of cannula body 1 falling off. The cannula body 1 has an irrigation hole 7 on its side wall. The irrigation hole 7 is located below the operating cavity 2. The irrigation hole 7 is used to provide distal perfusion blood supply when the patient's limb is ischemic, avoiding the need for another vascular puncture operation.

[0020] The natural length of the outer wall of the operating cavity 2 is greater than the natural length of the inner wall of the operating cavity 2. When the spring 4 is extended, the outer wall of the operating cavity 2 is in a natural state, and the inner wall of the operating cavity 2 is in a stretched state.

[0021] The upper end of the pull rope 5 is located on the outside of the blood vessel 6, and the operating chamber 2 is located on the inside of the blood vessel 6. When in use, as the operating spring 4 contracts, the outer wall of the protruding operating chamber 2 is always located on the inside of the blood vessel 6.

[0022] Working Principle: During use, the cannula body 1 is inserted into the patient's arterial vessel 6. The pull rope 5 extends from the side wall of the cannula body 1 as a positioning marker. Insertion is complete when the pull rope 5 extends from the side wall of the cannula body 1. First, the position of the cannula body 1 is defined, then the pull rope 5 is tightened. Several pull ropes 5 move the connecting ring 3 upwards, compressing the spring 4. The inner wall of the operating cavity 2 gradually returns to its natural state. Since the natural length of the outer wall of the operating cavity 2 is greater than the natural length of the inner wall, the outer wall of the operating cavity 2 protrudes. This protrusion prevents the cannula body 1 from dislodging. This method not only avoids discomfort to the patient's skin but also prevents instability caused by sweat, effectively solving the problem of cannula body 1 dislodging. In the event of lower limb ischemia during treatment, the distal perfusion cannula extends into the femoral artery through the perfusion port 7, thereby providing blood supply to the lower limb. This solves the problem of traditional distal perfusion cannulas requiring re-puncture of blood vessels, causing additional pain and harm to the patient.

Claims

1. An ECMO arterial cannula with anti-dislodgement and a built-in distal perfusion port, comprising a cannula body (1), characterized in that: An operating chamber (2) is provided on the inner side of the cannula body (1). An action spring (4) is provided on the inner side of the operating chamber (2). A connecting ring (3) is fixedly connected to the lower inner wall of the operating chamber (2). The lower end of the action spring (4) is fixedly connected to the upper end of the connecting ring (3). The upper end of the action spring (4) abuts against the upper inner wall of the operating chamber (2). Several pull ropes (5) are fixedly connected to the upper end of the connecting ring (3). The end of the pull rope (5) away from the connecting ring (3) extends to the top of the operating chamber (2) and passes through the side wall of the cannula body (1) to the outside of the cannula body (1). An injection hole (7) is opened on the side wall of the cannula body (1). The injection hole (7) is located below the operating chamber (2).

2. The ECMO arterial cannula with anti-dislodgement and a distal perfusion port as described in claim 1, characterized in that: The natural length of the outer side wall of the operating cavity (2) is greater than the natural length of the inner side wall of the operating cavity (2).

3. The ECMO arterial cannula with anti-dislodgement and a distal perfusion port as described in claim 1, characterized in that: The upper end of the pull rope (5) is located outside the blood vessel (6), and the operating cavity (2) is located inside the blood vessel (6).

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