Artery cannula providing far-end perfusion

Abstract

The utility model discloses an arterial cannula capable of providing far-end perfusion, which comprises a cannula main body, an arterial cannula, an arterial cannula and an arterial cannula body, and is characterized in that one end of the cannula main body is connected with a mechanical lung; the embedded pipe is fixedly connected to the inner wall of the cannula body, and the two ends of the embedded pipe are located in the cannula body; the infusion tube is inserted into the embedded tube, a puncture hole is formed in the side wall of the cannula body, an included angle of 120-160 degrees is formed between the axis of the puncture hole and the axis of the cannula body, and one end of the infusion tube extends out of the cannula body through the puncture hole; the butt joint assembly is installed at the end, located outside the cannula body, of the infusion tube, and the infusion tube is in butt joint with the infusion device conveying pipeline through the butt joint assembly. The embedded tube is matched with the infusion tube to conduct far-end infusion, a far-end infusion opening does not need to be formed in a blood vessel, and damage to the blood vessel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an arterial cannula providing distal perfusion. Background Art

[0002] Some cardiac surgeries require peripheral arterial cannulas for cardiopulmonary bypass. Moreover, some disease conditions require mechanical lung support through peripheral arterial cannulas. This peripheral artery is usually but not always the femoral artery. Inserting into the femoral artery requires an arterial cannula of sufficient size to provide cardiopulmonary assistance to the patient, but the distal segment of the cannula often causes local ischemia and tissue necrosis during the assistance process due to lack of sufficient blood flow to the lower limbs. To prevent ischemic necrosis of the distal limb, currently, a 5F - 7F arterial sheath is routinely inserted again by incising the artery at the distal segment of the femoral artery cannula to supply blood to the distal segment. However, the distal cannula will cause secondary damage to the femoral artery and surrounding tissues. Moreover, the distal femoral artery cannula needs to be connected to the femoral artery through an adapter tube. On the one hand, the long connecting tube affects the flow rate, and on the other hand, the connecting tube is prone to kinking, leading to thrombus formation.

[0003] For the above reasons, the utility model provides an arterial cannula providing distal perfusion. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an arterial cannula providing distal perfusion to solve the problems existing in the prior art.

[0005] To achieve the above purpose, the utility model provides the following scheme: The utility model provides an arterial cannula providing distal perfusion, including:

[0006] A cannula body, one end of which is connected to a mechanical lung;

[0007] An inner tube, which is fixedly connected to the inner wall of the cannula body, and the axis of the inner tube is parallel to the axis of the cannula body, and both ends of the inner tube are located inside the cannula body;

[0008] A perfusion tube, which is inserted into the inner tube. A puncture hole is formed on the side wall of the cannula body, and the puncture hole corresponds to the end of the inner tube close to the mechanical lung. An included angle is provided between the axis of the puncture hole and the axis of the cannula body, and the included angle is 120° - 160°. One end of the perfusion tube extends out of the cannula body through the puncture hole;

[0009] A docking assembly, which is installed at one end of the perfusion tube outside the cannula body, and the perfusion tube is docked with the conveying pipeline of the perfusion device through the docking assembly;

[0010] Wherein, the length of the inner tube is 5 cm - 7 cm.

[0011] According to the arterial cannula for providing distal perfusion provided by the present utility model, the docking assembly includes a docking sub-head and a docking mother-head. The docking mother-head is slidably sleeved on the docking sub-head. A fixing block is fixedly connected to the end of the inner wall of the docking mother-head. A chute is axially formed on the outer wall of the docking sub-head. The fixing block is slidably connected in the chute. A clamping groove is formed on the end face of the docking sub-head away from the docking mother-head. The clamping groove is arranged in a dislocation manner with the chute. A compression spring is fixedly connected in the docking mother-head. One end of the compression spring is fixedly connected with a pressing plate. The pressing plate abuts against the docking sub-head. The docking mother-head is rotatably connected with the conveying pipeline of the perfusion device. The docking sub-head is fixedly connected with the perfusion tube.

[0012] According to the arterial cannula for providing distal perfusion provided by the present utility model, the inner diameter of the cannula main body is 5 mm - 6 mm.

[0013] According to the arterial cannula for providing distal perfusion provided by the present utility model, the inner diameter of the perfusion tube is 1.5 mm - 2 mm.

[0014] According to the arterial cannula for providing distal perfusion provided by the present utility model, the end of the cannula main body away from the mechanical lung is set as an arc-shaped structure.

[0015] According to the arterial cannula for providing distal perfusion provided by the present utility model, scale lines are arranged on the perfusion tube.

[0016] According to the arterial cannula for providing distal perfusion provided by the present utility model, a sealing cap is slidably sleeved on the outer wall of the perfusion tube. The sealing cap and the puncture hole are correspondingly arranged.

[0017] According to the arterial cannula for providing distal perfusion provided by the present utility model, an annular airbag is installed on the outer wall of the end of the cannula main body away from the mechanical lung.

[0018] The present utility model discloses the following technical effects:

[0019] When the present utility model works, when distal perfusion is required, the perfusion tube is introduced into the inner embedded tube through the puncture hole and extends out of the inner embedded tube, and continues to be inserted until the distance between the perfusion tube extending out of the cannula main body and the part of the cannula main body at the distal end of the blood vessel is 1 mm - 2 mm; the perfusion tube is docked with the conveying pipeline of the perfusion device through the docking assembly, and distal perfusion is realized through the perfusion device.

[0020] The present utility model uses an inner embedded tube in cooperation with a perfusion tube for distal perfusion, and there is no need to open a distal perfusion port on the blood vessel any more, reducing the damage to the blood vessel. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of an arterial cannula for providing distal perfusion according to the present invention;

[0023] Figure 2 is Figure 1 an enlarged view of part A in

[0024] Figure 3 It is a schematic structural diagram of the docking assembly according to the present invention;

[0025] Figure 4 It is a schematic structural diagram of the docking sub - head according to the present invention.

[0026] Among them, 1. Cannula main body; 2. Inner embedded tube; 3. Perfusion tube; 4. Puncture hole; 5. Annular airbag; 6. Docking sub - head; 7. Docking female head; 8. Fixed block; 9. Slide groove; 10. Card slot; 11. Compression spring; 12. Pressure plate. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] To make the above - mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0029] Referring to Figures 1-4 , the present invention provides an arterial cannula for providing distal perfusion, including:

[0030] A cannula main body 1, one end of the cannula main body 1 is connected to a mechanical lung;

[0031] An inner embedded tube 2, the inner embedded tube 2 is fixedly connected to the inner wall of the cannula main body 1, and the axis of the inner embedded tube 2 is parallel to the axis of the cannula main body 1. Both ends of the inner embedded tube 2 are located inside the cannula main body 1;

[0032] The perfusion tube 3 is inserted into the embedded tube 2. A puncture hole 4 is formed on the side wall of the intubation main body 1. The puncture hole 4 is correspondingly arranged at one end of the embedded tube 2 close to the mechanical lung. An included angle is provided between the axis of the puncture hole 4 and the axis of the intubation main body 1, and the included angle is 120°-160°. One end of the perfusion tube 3 extends out of the intubation main body 1 through the puncture hole 4;

[0033] The docking assembly is installed at one end of the perfusion tube 3 outside the intubation main body 1. The perfusion tube 3 is docked with the conveying pipeline of the perfusion device through the docking assembly;

[0034] Among them, the length of the embedded tube 2 is 5 cm - 7 cm.

[0035] When the utility model works, when distal perfusion is required, the perfusion tube 3 is introduced into the embedded tube 2 through the puncture hole 4 and extends out of the embedded tube 2, and continues to be inserted until the distance between the perfusion tube 3 extending out of the intubation main body 1 and the distal part of the intubation main body 1 located in the blood vessel is 1 mm - 2 mm; the perfusion tube 3 is docked with the conveying pipeline of the perfusion device through the docking assembly, and distal perfusion is realized through the perfusion device.

[0036] The utility model adopts the embedded tube 2 to cooperate with the perfusion tube 3 for distal perfusion, and there is no need to open a distal perfusion port on the blood vessel any more, reducing the damage to the blood vessel.

[0037] In a further optimized solution, the docking assembly includes a docking sub-head 6 and a docking mother-head 7. The docking mother-head 7 is slidably sleeved on the docking sub-head 6. A fixing block 8 is fixedly connected to the inner wall end of the docking mother-head 7. A chute 9 is axially formed on the outer wall of the docking sub-head 6. The fixing block 8 is slidably connected in the chute 9. A clamping groove 10 is formed on the end face of the docking sub-head 6 away from the docking mother-head 7. The clamping groove 10 is arranged in a dislocation manner with the chute 9. A compression spring 11 is fixedly connected in the docking mother-head 7. One end of the compression spring 11 is fixedly connected with a pressing plate 12. The pressing plate 12 abuts against the docking sub-head 6. The docking mother-head 7 is rotatably connected with the conveying pipeline of the perfusion device, and the docking sub-head 6 is fixedly connected with the perfusion tube 3. The setting of the letter head can facilitate the docking of the perfusion tube 3 with the conveying pipeline of the perfusion device. The docking sub-head 6 and the docking mother-head 7 are docked. The docking sub-head 6 compresses the pressing plate 12 and the compression spring 11, so that the fixing block 8 passes through the chute 9 to reach one end of the docking sub-head 6 away from the docking mother-head 7, and the docking mother-head 7 is rotated to make the fixing block 8 stuck in the clamping groove 10, thereby realizing the docking of the docking sub-head 6 and the docking mother-head 7 and reducing the disassembly and assembly difficulty.

[0038] In a further optimized solution, the inner diameter of the intubation main body 1 is 5 mm - 6 mm.

[0039] For a further optimized solution, the inner diameter of the perfusion tube 3 is 1.5 mm - 2 mm. The diameter of the perfusion tube 3 adopts a stepped shape, that is, a diameter gradient difference is formed between the diameter inside the puncture hole 4 and the diameter outside the puncture hole 4, and the diameter outside the puncture hole 4 is larger than the diameter inside the puncture hole 4, so as to facilitate docking with other pipelines. The inner diameter of the perfusion tube 3 located inside the embedded tube 2 is 1.5 mm - 2 mm.

[0040] For a further optimized solution, the end of the intubation main body 1 away from the mechanical lung is set as an arc-shaped structure. The setting of the arc-shaped structure can reduce the puncture difficulty of the intubation main body 1 and avoid damaging blood vessels.

[0041] For a further optimized solution, scale lines are provided on the perfusion tube 3. The setting of the scale lines can clearly know the insertion depth of the perfusion tube 3 and facilitate controlling the extension length of the perfusion tube 3.

[0042] For a further optimized solution, a sealing cap is slidably sleeved on the outer wall of the perfusion tube 3, and the sealing cap corresponds to the puncture hole 4. The sealing cap is a hollow T-shaped rotating body structure, sleeved on the outer wall of the perfusion tube 3, and a sealing head is detachably installed at the end of the sealing cap. In this way, after the perfusion tube 3 is pulled out, the sealing cap can be inserted into the side puncture hole 4, and then sealed through the sealing head to ensure the sealing performance of the intubation main body 1.

[0043] For a further optimized solution, an annular airbag 5 is installed on the outer wall of the end of the intubation main body 1 away from the mechanical lung. The airbag is connected to a gas supply device and is used to ensure the sealing between the intubation main body 1 and the arterial blood vessel.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0045] The embodiments described above are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. An arterial cannula for providing distal perfusion, characterized in that: include: A cannula body (1), one end of which is connected to a mechanical lung; An embedded tube (2), the embedded tube (2) being fixedly connected to the inner wall of the cannula body (1), the axis of the embedded tube (2) being parallel to the axis of the cannula body (1), and both ends of the embedded tube (2) being located inside the cannula body (1); A perfusion tube (3), the perfusion tube (3) is inserted into the embedded tube (2), a puncture hole (4) is provided on the side wall of the cannula body (1), the puncture hole (4) is arranged corresponding to the end of the embedded tube (2) close to the mechanical lung, an angle is arranged between the axis of the puncture hole (4) and the axis of the cannula body (1), and the angle is 120°-160°, and one end of the perfusion tube (3) extends out of the cannula body (1) through the puncture hole (4); A docking assembly, the docking assembly being mounted on one end of the perfusion tube (3) located outside the cannula body (1), and the perfusion tube (3) is docked with a delivery pipeline of a perfusion device through the docking assembly; Wherein, the length of the embedded tube (2) is 5cm-7cm.

2. An arterial cannula for providing distal perfusion according to claim 1, characterized in that: The docking assembly comprises a docking sub-head (6) and a docking female head (7), wherein the docking female head (7) is slidably sleeved on the docking sub-head (6), a fixing block (8) is fixedly connected to the inner wall end of the docking female head (7), a sliding groove (9) is provided on the outer wall of the docking sub-head (6) along the axial direction, and the fixing block (8) is slidably connected in the sliding groove (9), a clamping groove (10) is provided on the end surface of the docking sub-head (6) away from the docking female head (7), and the clamping groove (10) and the sliding groove (9) are staggered, a compression spring (11) is fixedly connected inside the docking female head (7), one end of the compression spring (11) is fixedly connected to a pressure plate (12), and the pressure plate (12) is abutted against the docking sub-head (6), the docking female head (7) is rotatably connected to the delivery pipeline of the perfusion device, and the docking sub-head (6) is fixedly connected to the perfusion pipe (3).

3. An arterial cannula for providing distal perfusion according to claim 1, characterized in that: The inner diameter of the cannula body (1) is 5 mm-6 mm.

4. An arterial cannula for providing distal perfusion according to claim 1, characterized in that: The inner diameter of the perfusion tube (3) is 1.5 mm-2 mm.

5. An arterial cannula for providing distal perfusion according to claim 1, characterized in that: The end of the cannula body (1) away from the mechanical lung is configured as an arc-shaped structure.

6. An arterial cannula for providing distal perfusion according to claim 1, characterized in that: The perfusion tube (3) is provided with scale lines.

7. An arterial cannula for providing distal perfusion according to claim 1, characterized in that: The outer wall sliding sleeve of the perfusion tube (3) is provided with a sealing cap, and the sealing cap is arranged correspondingly to the puncture hole (4).

8. An arterial cannula for providing distal perfusion according to claim 1, characterized in that: An annular air bag (5) is installed on the outer wall of the end of the cannula body (1) away from the mechanical lung.

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