Femoral arteriovenous cannula

Abstract

The invention discloses a femoral arteriovenous cannula, and relates to the technical field of medical instruments. The femoral arteriovenous cannula comprises a cannula body, an inner core and a guiding piece. An abutting part is arranged at the far end of the cannula; the inner core is movably inserted into the cannula and is used for puncturing the artery; and the guide piece is arranged on the outer wall of the far end of the inner core and is used for abutting against the abutting part during catheterization, so that the inner core drives the intubation tube to a target catheterization position. The femoral arteriovenous intubation structure is improved, and the guide structure is arranged on the inner core, so that the operation difficulty of intubation is effectively reduced, and the operation is more efficient and safer.

Description

Technical Field

[0001] The present invention relates to the technical field of femoral arteriovenous intubation, and particularly to a femoral arteriovenous intubation. Background Art

[0002] In the prior art, due to reasons such as the precision of materials and molds, it is still difficult to perform femoral arteriovenous intubation even with a guide wire. The main problem lies in the poor manufacturing precision of the intubation and the inner core. There is a certain gap between the outer wall of the inner core and the inner wall of the intubation, and they cannot fit tightly. It is not easy for the inner core to carry the intubation into the target intubation position. Summary of the Invention

[0003] The main object of the present invention is to provide a femoral arteriovenous intubation, aiming to reduce the intubation difficulty of the femoral arteriovenous intubation and improve the efficiency of the operation.

[0004] To achieve the above object, the present invention provides a femoral arteriovenous intubation, including:

[0005] An intubation, with a butt joint portion provided at the distal end of the intubation;

[0006] An inner core, movably inserted into the intubation and used for puncturing the artery; and

[0007] A guiding member, provided on the outer wall of the distal end of the inner core, and the guiding member is used to abut against the butt joint portion during intubation, so that the inner core drives the intubation to the target intubation position.

[0008] Optionally, the guiding member includes a fixing ring and a flexible film. The fixing ring is installed on the outer peripheral wall of the inner core. One end of the flexible film is provided on the fixing ring, and the other end of the flexible film is a free end and abuts against the butt joint portion during intubation, so that the outer wall of the inner core is closely combined with the inner wall of the intubation.

[0009] Optionally, there are a plurality of the flexible films. The plurality of flexible films are all strip-shaped and are circumferentially and evenly distributed on the outer periphery of the fixing ring.

[0010] Optionally, an annular groove is formed on the outer peripheral wall of the inner core, and the fixing ring is installed in the annular groove.

[0011] Optionally, the material of the fixing ring is stainless steel or medical plastic.

[0012] Optionally, a conical puncturing portion for puncturing is provided at the distal end of the inner core.

[0013] Optionally, a blocking portion for blocking the proximal opening of the intubation is provided at the proximal end of the inner core.

[0014] Optionally, the abutting portion is an annular arm provided at the distal end of the cannula and extending toward the inner cavity of the cannula.

[0015] Optionally, a connection interface is provided at the proximal opening of the cannula for connecting a perfusion device.

[0016] Optionally, the connection interface is a Luer interface.

[0017] In the technical solution of the present invention, the arteriovenous cannula includes a cannula, a core, and a guide member; an abutting portion is provided at the distal end of the cannula; the core is movably inserted into the cannula and is used for puncturing an artery; the guide member is provided on the outer wall of the distal end of the core, and the guide member is used to abut against the abutting portion during catheterization so that the core drives the cannula to the target catheterization position. It can be understood that the present invention improves the structure of the arteriovenous cannula. By providing a guiding structure on the core, during the catheterization process, the outer wall of the distal end of the core can fit more closely with the inner wall of the cannula, driving the cannula to the target catheterization position, effectively reducing the operation difficulty of catheterization, and making the operation more efficient and safe. Description of the Drawings

[0018] In order 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 for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0019] Figure 1 Schematic structural diagram of an embodiment of the arteriovenous cannula of the present invention;

[0020] Figure 2 Front view of an embodiment of the arteriovenous cannula of the present invention;

[0021] Figure 3 Cross-sectional view of an embodiment of the arteriovenous cannula of the present invention;

[0022] Figure 4 Exploded view of an embodiment of the arteriovenous cannula of the present invention;

[0023] Figure 5 Side view of an embodiment of the arteriovenous cannula of the present invention ( Figure 2 right view).

[0024] Explanation of the reference numerals in the drawings:

[0025] 10. Cannula; 20. Core; 30. Guide member; 101. Abutting portion; 31. Fixed ring; 32. Flexible film; 20a. Annular groove; 201. Conical puncture portion.

[0026] The realization, functional features, and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

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

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0031] The present invention provides a femoral arteriovenous cannula, which can be applicable to femoral artery or aortic cannulation, etc., without limitation here.

[0032] Refer to Figures 1 to 5, in an embodiment of the present invention, the arteriovenous cannula includes a cannula 10, an inner core 20, and a guiding member 30; a contact portion 101 is provided at the distal end of the cannula 10; the inner core 20 is movably inserted into the cannula 10 and is used for puncturing an artery; the guiding member 30 is provided on the outer wall of the distal end of the inner core 20, and the guiding member 30 is used to abut against the contact portion 101 during catheter placement so that the inner core 20 drives the cannula 10 to the target catheter placement position.

[0033] In this embodiment, the cannula 10 may be provided with at least one axial channel for the inner core 20 to be inserted and perfused. Preferably, the contact portion 101 of the cannula 10 may be an annular arm extending from the distal end of the cannula 10 towards the inner cavity of the cannula 10, and the inner diameter of the annular arm of the cannula 10 is approximately equal to the outer diameter of the inner core 20. Such a setting can improve the ease of catheter placement while also enabling a relatively large gap between other parts (non-contact parts) of the inner wall of the cannula 10 and the outer wall of the inner core 20, thereby improving the convenience of inserting and removing the cannula 10.

[0034] In this embodiment, the inner core 20 may be a solid structure or a hollow structure and cooperate with a guide wire for puncturing and catheter placement, which is not specifically limited here. A conical puncture portion 201 for puncturing may be provided at the distal end of the inner core 20 to facilitate puncturing and catheter placement.

[0035] In this embodiment, the guiding member 30 may be a layer of guiding film or a flexible protrusion provided on the distal end of the inner core 20, etc., to compensate for the gap between the outer wall of the inner core 20 and the inner wall of the cannula 10. A relatively flexible material may be preferably selected to avoid the situation where the inner core 20 cannot be pulled out.

[0036] It should be noted that due to limitations in manufacturing processes in the prior art, it is difficult to make the inner diameter of the cannula 10 exactly equal to the outer diameter of the inner core 20, and it is difficult for the outer wall of the inner core 20 to closely fit the inner wall of the cannula 10 during catheter placement. This is exactly the reason for proposing the arteriovenous cannula of the present invention.

[0037] It can be understood that the present invention improves the structure of the arteriovenous cannula. By providing a guiding structure on the inner core 20, during the catheter placement process, the outer wall of the distal end of the inner core 20 can more closely fit the inner wall of the cannula 10, driving the cannula 10 to the target catheter placement position, effectively reducing the operation difficulty of catheter placement and making the operation more efficient and safe.

[0038] In an embodiment, refer to Figures 1 to 5, the guiding member 30 may include a fixing ring 31 and a flexible film 32. The fixing ring 31 is installed on the outer peripheral wall of the inner core 20. One end of the flexible film 32 is disposed on the fixing ring 31, and the other end of the flexible film 32 is a free end and abuts against the abutting portion 101 during catheter placement, so that the outer wall of the inner core 20 is closely combined with the inner wall of the catheter 10. With such a setting, while reducing the operation difficulty of catheter placement, the convenience of production and assembly is improved, the contact area between the catheter 10 and the inner core 20 is reduced, and the ease of retracting the inner core 20 is greatly improved.

[0039] Mainly referring to Figure 4 , in this embodiment, mainly referring to Figure 4 and Figure 5 , there are a plurality of flexible films 32. The plurality of flexible films 32 are all strip-shaped and are circumferentially and evenly distributed on the outer periphery of the fixing ring 31. With such a setting, the material consumption of the guiding film can be saved, and the overall softness of the guiding film can be further improved, which is beneficial to the retraction of the inner core 20 and makes catheter placement easier.

[0040] To facilitate the assembly of the guiding member 30, further, referring to Figures 1 to 4 , an annular groove 20a is formed on the outer peripheral wall of the inner core 20, and the fixing ring 31 is installed in the annular groove 20a.

[0041] In this embodiment, the material of the fixing ring 31 can be stainless steel or medical plastic, etc., which is not limited here.

[0042] In one embodiment, a blocking portion for blocking the proximal opening of the catheter 10 is provided at the proximal end of the inner core 20. The blocking portion covers the proximal opening of the catheter 10, which can effectively prevent high-pressure arterial blood from spraying out from the inner cavity of the catheter 10.

[0043] In one embodiment, a connection interface is provided at the proximal opening of the catheter 10 for connecting a perfusion device. In this way, it is convenient to connect the perfusion device and helps to improve the operation efficiency.

[0044] In this embodiment, the connection interface can be a Luer interface, etc., which is not limited here.

[0045] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A femoral arteriovenous cannula, characterized in that: include: a cannula, wherein the distal end of the cannula is provided with an abutment portion; An inner core, movably inserted into the cannula and used for puncturing an artery; as well as The guide piece is arranged on the outer wall of the distal end of the inner core, and the guide piece is used to abut against the abutment portion when the tube is placed, so that the inner core drives the cannula to the target cannulation position.

2. The femoral arteriovenous cannula according to claim 1, characterized in that: The guide member includes a fixing ring and a flexible film. The fixing ring is installed on the outer peripheral wall of the inner core. One end of the flexible film is arranged on the fixing ring. The other end of the flexible film is a free end and abuts against the abutment portion when the tube is placed, so that the outer wall of the inner core is tightly combined with the inner wall of the insertion tube.

3. The femoral arteriovenous cannula according to claim 2, characterized in that: There are a plurality of flexible films, all of which are strip-shaped and are evenly distributed on the outer circumference of the fixing ring at circumferential intervals.

4. The femoral arteriovenous cannula according to claim 2, characterized in that: An annular groove is provided on the outer peripheral wall of the inner core, and the fixing ring is installed in the annular groove.

5. The femoral arteriovenous cannula according to claim 2, characterized in that: The material of the fixing ring is stainless steel or medical plastic.

6. The femoral arteriovenous cannula according to claim 1, characterized in that: The distal end of the inner core is provided with a conical puncture portion for puncture.

7. The femoral arteriovenous cannula according to claim 1, characterized in that: The proximal end of the inner core is provided with a blocking portion for blocking the proximal opening of the cannula.

8. The femoral arteriovenous cannula according to claim 1, characterized in that: The abutment portion is a ring arm arranged at the distal end of the cannula and extending toward the inner cavity of the cannula.

9. The femoral arteriovenous cannula according to claim 1, characterized in that: The proximal opening of the cannula is provided with a connection interface for connecting to a perfusion device.

10. The femoral arteriovenous cannula according to claim 9, characterized in that: The connection interface is a Luer interface.

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