Arterial cannula with far-end perfusion side hole

Abstract

The utility model discloses an arterial cannula with a far-end perfusion side hole, and relates to the technical field of medical instruments. Comprising a first intubation tube and a second intubation tube, the lower end of the first intubation tube is connected with the upper end of the second intubation tube, the second intubation tube is a blood vessel built-in tube, a perfusion side hole is formed in the side wall of the second intubation tube, and a clamping mechanism is further arranged on the first intubation tube. The side wall of the first intubation tube is provided with the perfusion side hole, when lower limb ischemia of a patient occurs, the blood vessel does not need to be punctured again through a far-end perfusion tube, only blood needs to be supplemented into the blood vessel of the patient from the first intubation tube and the perfusion side hole box, pain and injury of the patient are greatly relieved, and operation is more convenient. Meanwhile, a clamping mechanism is arranged, so that the problem that the device is easy to loosen and fall off is effectively solved when the device is used.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an arterial cannula with a built-in distal perfusion side hole. Background Technology

[0002] Arterial catheterization has a wide range of applications in the medical field, especially when it is necessary to infuse drugs into an artery or perform angiography. It usually consists of a catheter and a catheter hub, and is mostly made of malleable thick-walled plastic or other medical materials. Some products have a hydrophilic or PTFE coating to reduce friction.

[0003] During prolonged cardiopulmonary bypass or certain treatments, patients may experience lower limb ischemia. This is because arterial cannulation 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 arterial cannula with a built-in distal perfusion side hole, which solves the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an arterial cannula with a distal perfusion side hole, comprising a cannula one and a cannula two, wherein the lower end of the cannula one is connected to the upper end of the cannula two, the cannula two is an in-vessel cannula, a perfusion side hole is provided on the side wall of the cannula two, and a locking mechanism is also provided on the cannula one.

[0007] The locking mechanism includes a limiting plate one and a limiting plate two. A storage groove is provided on the side wall of the insertion tube one. The limiting plate one is located in the storage groove, and the limiting plate two is located in the injection side hole. A pull rope one is fixedly connected to the end of the outer side wall of the limiting plate one near the insertion tube two, and a pull rope two is fixedly connected to the end of the outer side wall of the limiting plate two near the insertion tube two. The ends of the pull rope one and the pull rope two away from the insertion tube two both penetrate the side wall of the insertion tube one and extend to the outside of the insertion tube one.

[0008] Preferably, an elastic reset piece 1 is fixedly connected to the end of the limiting plate 1 away from the insertion tube 2, and the upper end of the elastic reset piece 1 is fixedly connected to the inner wall of the receiving groove 1 away from the insertion tube 2. An elastic reset piece 2 is fixedly connected to the end of the limiting plate 2 away from the insertion tube 2, and the upper end of the elastic reset piece 2 is fixedly connected to the inner wall of the irrigation side hole away from the insertion tube 2.

[0009] Preferably, the second cannula is a soft tube.

[0010] Compared with related technologies, the arterial cannula with a built-in distal perfusion side hole provided by this utility model has the following beneficial effects:

[0011] 1. This utility model provides an arterial cannula with a built-in distal perfusion side hole. In this device, a perfusion side hole is opened on the side wall of the cannula. When the patient's lower limb ischemia occurs, there is no need to puncture the blood vessel again through the distal perfusion cannula. Blood can be replenished from the patient's blood vessels through the cannula and the perfusion side hole, which greatly reduces the patient's pain and harm, and the operation is more convenient.

[0012] 2. This utility model provides an arterial cannula with a built-in distal perfusion side hole. The device includes a locking mechanism on the cannula, which is also located inside the blood vessel. After the cannula is inserted into the patient's blood vessel and its position is determined, the external system first limits the position of the cannula. Pulling the first and second pull ropes unfolds the first and second limiting plates, effectively preventing the device from easily loosening and falling off. An elastic reset piece is provided between the first limiting plate and the storage groove, and an elastic reset piece is provided between the perfusion side hole and the second limiting plate. When the device needs to be withdrawn, the first and second pull ropes are released, and the elastic reset pieces retract the first and second limiting plates into the storage groove and the perfusion side hole, facilitating the removal of the device. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle;

[0015] Figure 3 This is a cross-sectional structural diagram of the device in use according to this utility model;

[0016] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle.

[0017] In the diagram: 1. Cannula 1; 2. Cannula 2; 3. Blood vessel; 4. Storage slot; 5. Limiting plate 1; 6. Elastic repositioning plate 1; 7. Irrigation side hole; 8. Limiting plate 2; 9. Elastic repositioning plate 2; 10. Pull-out rope 1; 11. Pull-out rope 2. 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 1-4 This utility model provides a technical solution: an arterial cannula with a distal perfusion side hole, including a cannula 1 and a cannula 2. The lower end of the cannula 1 is connected to the upper end of the cannula 2. The cannula 2 is an intubation tube in a blood vessel 3. A perfusion side hole 7 is provided on the side wall of the cannula 2. The cannula 1 is also provided with a locking mechanism. After the limiting plate 2 8 is opened, the perfusion side hole 7 on the side wall of the cannula 2 is exposed. When the patient's lower limb ischemia occurs, it is not necessary to puncture the blood vessel 3 again through the distal perfusion tube. Blood can be replenished from the patient's blood vessel 3 through the cannula 1 and the perfusion side hole 7, which greatly reduces the patient's pain and harm and makes the operation more convenient.

[0020] The locking mechanism includes a first limiting plate 5 and a second limiting plate 8. A receiving groove 4 is provided on the side wall of the first insertion tube 1. The first limiting plate 5 is located within the receiving groove 4, and the second limiting plate 8 is located within the injection side hole 7. A pull rope 10 is fixedly connected to the end of the outer wall of the first limiting plate 5 near the second insertion tube 2, and a pull rope 21 is fixedly connected to the end of the outer wall of the second limiting plate 8 near the second insertion tube 2. The ends of both pull ropes 10 and 21, away from the second insertion tube 2, penetrate the side wall of the first insertion tube 1 and extend to the outside of the first insertion tube 1. In use, the insertion tube in this device... The second cannula is inserted into the femoral artery for medical treatment. After the first cannula is fully inserted, the insertion continues. When the patient's skin is located at the connection point between the first pull rope 10 and the second pull rope 11 and the first cannula, the insertion is paused. At this time, the locking mechanism is completely inside the blood vessel 3. After the arterial cannula is inserted into the patient's blood vessel 3 and the position is determined, the position of the first cannula is first limited externally. Pulling the first pull rope 10 and the second pull rope 11 will unfold the first limiting plate 5 and the second limiting plate 8, effectively preventing the device from easily loosening and falling off.

[0021] One end of the limiting plate 5 away from the insertion tube 2 is fixedly connected to an elastic reset piece 6. The upper end of the elastic reset piece 6 is fixedly connected to the inner wall of the receiving groove 4 away from the insertion tube 2. One end of the limiting plate 8 away from the insertion tube 2 is fixedly connected to an elastic reset piece 9. The upper end of the elastic reset piece 9 is fixedly connected to the inner wall of the infusion side hole 7 away from the insertion tube 2. When it is necessary to remove the device, the pull rope 10 and pull rope 21 are loosened. Under the action of the elastic reset piece 6 and the elastic reset piece 9, the limiting plate 5 and the limiting plate 8 are re-stored into the receiving groove 4 and the infusion side hole 7, so as to facilitate the removal of the device.

[0022] The second cannula is a soft tube, and the clamping mechanism is located inside the blood vessel 3, thereby ensuring that the clamping mechanism can play a limiting role during use and effectively prevent the device from loosening and falling off.

[0023] Working principle: During use, the second cannula 2 of this device is inserted into the femoral artery for medical treatment. After the first cannula 1 is fully inserted, insertion continues. When the patient's skin is positioned at the connection point between the first pull rope 10 and the second pull rope 11 and the first cannula 1, the insertion is paused. At this point, the locking mechanism is completely inside the blood vessel 3. After the arterial cannula is inserted into the patient's blood vessel 3 and its position is determined, the position of the first cannula 1 is first externally restricted. Pulling the first pull rope 10 and the second pull rope 11 will unfold the first limiting plate 5 and the second limiting plate 8, effectively preventing the device from easily loosening and falling off. After the second limiting plate 8 is opened, the perfusion side hole 7 on the side wall of the second cannula 2 is exposed. When the patient's lower limb ischemia occurs, it is not necessary to puncture the blood vessel 3 again through the distal perfusion tube. Blood can be replenished from the first cannula 1 and the perfusion side hole 7 into the patient's blood vessel 3, greatly reducing the patient's pain and harm, and making the operation more convenient. When it is necessary to remove the device, loosen the pull rope 10 and pull rope 21. Under the action of the elastic reset plate 16 and elastic reset plate 29, the limiting plate 15 and limiting plate 28 will be repositioned into the storage groove 4 and the filling side hole 7, thus facilitating the removal of the device.

Claims

1. An arterial cannula with a distal perfusion side hole, comprising a cannula one (1) and a cannula two (2), characterized in that: The lower end of the first cannula (1) is connected to the upper end of the second cannula (2). The second cannula (2) is an intubation cannula (3). An irrigation side hole (7) is provided on the side wall of the second cannula (2). The first cannula (1) is also provided with a locking mechanism, which includes a limiting plate (5) and a limiting plate (8). A receiving groove (4) is provided on the side wall of the first cannula (1). The limiting plate (5) is located in the receiving groove (4). The second limiting plate (8) is located inside the injection side hole (7). The outer wall of the first limiting plate (5) is fixedly connected to the end of the second insertion tube (2) with a pull rope (10). The outer wall of the second limiting plate (8) is fixedly connected to the end of the second insertion tube (2) with a pull rope (11). The ends of the pull rope (10) and the pull rope (11) away from the second insertion tube (2) both penetrate the side wall of the first insertion tube (1) and extend to the outside of the first insertion tube (1).

2. An arterial cannula with a distal perfusion side hole according to claim 1, characterized in that: The end of the limiting plate 1 (5) away from the insertion tube 2 (2) is fixedly connected to an elastic reset piece 1 (6). The upper end of the elastic reset piece 1 (6) is fixedly connected to the inner wall of the receiving groove (4) away from the insertion tube 2 (2). The end of the limiting plate 2 (8) away from the insertion tube 2 (2) is fixedly connected to an elastic reset piece 2 (9). The upper end of the elastic reset piece 2 (9) is fixedly connected to the inner wall of the irrigation side hole (7) away from the insertion tube 2 (2).

3. The arterial cannula with distally located side hole for remote perfusion according to claim 1, characterized in that: The second cannula (2) is a soft tube.

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