Arterial cannula for domestic rabbits

Abstract

The utility model discloses an arterial cannula for domestic rabbits, which comprises a circular-tube-shaped cannula body, an annular groove is formed at the front end of the cannula body, an annular air bag is sleeved in the annular groove, an air inlet tube communicated with the air bag is formed in the cannula body, and a one-way valve structure is mounted on the air inlet tube. The one-way valve structure comprises two oppositely-arranged membrane petal-shaped flexible elastic pieces. The outer ends of the two flap-shaped flexible elastic sheets are fixed on the inner wall of the air inlet pipe, and the inner ends of the two flap-shaped flexible elastic sheets are pressed against each other. The annular air bag is placed in the annular groove, obstruction of the air bag and damage to the artery when the cannula enters the artery are avoided, air leakage after the air bag is inflated is prevented through the air inlet pipe and the special one-way valve structure, and the air bag can be deflated quickly according to needs.

Description

Technical Field

[0001] This utility model relates to the field of biotechnology, specifically to an arterial cannula for rabbits. Background Technology

[0002] Rabbits are commonly used laboratory animals. When using them in experiments, it is often necessary to insert cannulas into arteries for interactive experiments such as blood pressure measurement. However, due to the elasticity of the arterial wall and the strong blood flow within the artery, the cannula can gradually detach, causing blood to spray out. To prevent cannula dislodgement, invention patent 202210684064.2 discloses a femoral artery cannula, and utility model patent 202320530895.4 discloses an integrated ECMO-IABP arterial cannula. Both rely on an inflatable balloon to compress and contact the arterial wall for dislodgement prevention. However, both are fixed to the outer surface of the cannula, causing the balloon to rub against the arterial wall during insertion. The balloon is typically made of rubber or similar materials, resulting in high frictional resistance and making it prone to damaging the arterial wall during insertion. Furthermore, these methods use fixing lines or clamps to prevent balloon leakage or a pressure-stabilizing device to maintain airflow and keep the balloon inflated. Furthermore, the connecting airway is located between the outer wall of the endotracheal tube and the artery, resulting in a non-smooth contact surface between the tube and the artery, creating a gap that allows blood to flow out of the artery. Also, once the cuff is inflated, it is difficult to deflate and remove the endotracheal tube. Utility Model Content

[0003] The purpose of this invention is to provide an arterial cannula for rabbits.

[0004] To solve the above problems, the technical solution of this utility model is:

[0005] An arterial cannula for rabbits includes a cylindrical cannula body with an annular groove at its front end. An annular air bladder is fitted inside the annular groove. An air inlet tube communicating with the air bladder is formed inside the cannula body, and a one-way valve structure is installed on the air inlet tube. The one-way valve structure includes two oppositely arranged membrane-like flexible springs. The outer ends of the two membrane-like flexible springs are fixed to the inner wall of the air inlet tube, and the inner ends are pressed against each other.

[0006] A further improvement is that a limit block is fixed on the outer surface of the rear end of the cannula body.

[0007] A further improvement is that the front end of the cannula body is a wedge-shaped portion 0.

[0008] In a further improvement, the annular airbag is a rubber airbag.

[0009] In a further improvement, the cannula body is a plastic cannula, a glass cannula, or a metal cannula.

[0010] As a further improvement, the cannula body is marked with graduations.

[0011] Advantages of this utility model:

[0012] This invention uses an annular groove to place an annular airbag, which avoids obstruction and damage to the artery caused by the airbag when inserting the cannula. Furthermore, the air inlet tube and special one-way valve structure prevent air leakage after the airbag is inflated, and facilitate the rapid deflation of the airbag as needed. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of a one-way valve in closed position.

[0015] Figure 3 A schematic diagram of the structure when the one-way valve is open. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the technical solutions in the embodiments of this utility model will be clearly and completely described below.

[0017] like Figure 1 The arterial cannula for rabbits shown includes a cannula body 1, a wedge-shaped portion 101, an annular groove 2, an annular air bladder 3, an air inlet tube 4, a one-way valve structure 5, a membrane-like flexible elastic piece 51, and a limiting block 6.

[0018] The cannula body 1 has a wedge-shaped part 101 at the front end, and an annular groove 2 is formed adjacent to the wedge-shaped part 101. An annular airbag 3 is inserted into the annular groove 2. An air inlet pipe 4 communicating with the airbag 3 is formed inside the cannula body 1. A one-way valve structure 5 is installed at the air inlet end of the air inlet pipe 4. The one-way valve structure 5 includes two oppositely arranged membrane flap-shaped flexible springs 51. The outer ends of the two membrane flap-shaped flexible springs 51 are fixed to the inner wall of the air inlet pipe 4, and the inner ends are pressed against each other.

[0019] The method of its use is as follows:

[0020] After inserting the cannula body 1 into the artery, an air inlet tube 4 is inflated using a syringe or air pump, causing the balloon 3 to inflate and make close contact with the inner wall of the artery. Due to the one-way valve structure 5, the inflated air cannot flow out, thus maintaining the inflation of the balloon 3. Figure 2 As shown. When it is necessary to remove the cannula body 1, insert the needle 7 between the two membrane-like flexible springs 51, and then squeeze the membrane-like flexible springs 51 upwards or downwards to form an air outlet, as shown. Figure 3 As shown, the cannula body 1 can be pulled out after the gas inside the airbag flows out.

[0021] A limiting block 6 is fixed to the outer surface of the rear end of the intubation tube body 1. When the intubation tube is inserted, the limiting block can be pushed to prevent slippage of the intubation tube body due to hand sweat or other reasons. In addition, after the intubation tube is inserted, tape can be wrapped around the rear end of the limiting block 6 for initial fixation before inflating the airbag to prevent the intubation tube body from slipping out during inflation.

[0022] The device includes a cylindrical cannula body 1, with an annular groove 2 formed at the front end of the cannula body 1. An annular airbag 3 is inserted into the annular groove 2. An air inlet pipe 4 communicating with the airbag 3 is formed inside the cannula body 1. A one-way valve structure 5 is installed on the air inlet pipe 4. The one-way valve structure 5 includes two oppositely arranged membrane flap-shaped flexible springs 51. The outer ends of the two membrane flap-shaped flexible springs 51 are fixed to the inner wall of the air inlet pipe 4, and the inner ends are pressed against each other.

[0023] The annular airbag 3 is a rubber airbag, and the cannula body 1 is a plastic cannula, but it can also be a glass cannula or a metal cannula.

[0024] Furthermore, the cannula body 1 is marked with graduations to indicate the depth of insertion of the cannula body.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An arterial cannula for domestic rabbits, characterized in that The utility model relates to a kind of tracheal cannula, including circular tubular tracheal cannula body (1), the annular groove (2) of tracheal cannula body (1) front end is formed with, annular air bag (3) is sleeved into annular groove (2), the air inlet pipe (4) that is communicated with air bag (3) is formed in tracheal cannula body (1), one-way valve structure (5) is installed on air inlet pipe (4);The one-way valve structure (5) includes two oppositely arranged membrane lobe flexible spring (51);Two membrane lobe flexible spring (51) outer end is fixed on the inner wall of air inlet pipe (4), and inner end is pressed tightly mutually.

2. The arterial cannula for domestic rabbits as claimed in claim 1, characterized in that The rear end outer surface of the tracheal cannula body (1) is fixed with a limiting block (6).

3. The arterial cannula for domestic rabbits as claimed in claim 2, characterized in that The front end of the tracheal cannula body (1) is a wedge-shaped part (101).

4. The arterial cannula for domestic rabbits as claimed in claim 1, characterized in that, The annular air bag (3) is a rubber air bag.

5. The arterial cannula for domestic rabbits as claimed in claim 1, characterized in that, The tracheal cannula body (1) is a plastic tracheal cannula, a glass tracheal cannula or a metal tracheal cannula.

6. The arterial cannula for rabbits according to any one of claims 1 to 5, characterized in that The tracheal cannula body (1) is marked with a scale.

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