Anesthesia extension catheter capable of exhausting air

Abstract

The anesthesia extension catheter comprises an inlet part, a catheter body and an outlet part which are sequentially connected, and further comprises an exhaust device, the exhaust device is located on the catheter body and communicated with the catheter body, the exhaust device comprises a shell, an exhaust hole and a gas-liquid isolating membrane, the exhaust hole is located in the surface of the shell, and the gas-liquid isolating membrane is located in the shell. The gas-liquid isolating membrane is located in the shell and separates the guide pipe body from the exhaust hole. And the pressure valve is positioned above the conduit main body and is positioned between the exhaust device and the outlet part. The anesthesia extension catheter capable of exhausting has the advantages of being simple in structure, convenient to use, wide in application range and the like.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to an anesthesia extension catheter capable of exhausting air. Background Art

[0002] Local anesthesia surgery is usually performed under ultrasound guidance. First, the anesthesia needle is punctured, and then the anesthesia extension catheter and the anesthesia syringe are connected to form an anesthesia circuit, and then the anesthetic is continuously injected into the anesthesia circuit. When connecting the anesthesia extension catheter, the air inside the anesthesia extension catheter must be exhausted first, otherwise the unexpelled air will enter the human tissue near the anesthesia needle to form bubbles, which will affect the transmission of ultrasound, reduce the quality of ultrasound images and affect the effect of the operation. Summary of the invention

[0003] In view of this, the present invention proposes an anesthesia extension catheter capable of exhausting gas, which can solve the above existing technical problems. The present invention provides the following technical solutions:

[0004] An anesthetic extension catheter capable of exhausting air comprises an inlet portion, a catheter body and an outlet portion connected in sequence, and further comprises: an exhaust device, the exhaust device is located on the catheter body and communicated with the catheter body, comprises a shell, an exhaust hole and a gas-liquid isolation membrane, the exhaust hole is located on the surface of the shell, the gas-liquid isolation membrane is located inside the shell and separates the catheter body and the exhaust hole; and a pressure valve, the pressure valve is located on the catheter body and between the exhaust device and the outlet portion.

[0005] Optionally, a branch pipe is provided on the side wall of the conduit body, and the exhaust device is connected to the conduit body through the branch pipe.

[0006] Optionally, the gas-liquid isolation membrane allows gas to pass through and blocks liquid from passing through.

[0007] Optionally, the pressure valve is set to close when the pressure in the catheter body is less than a threshold value, so that the air in the catheter body is discharged from the exhaust hole after passing through the air-liquid isolation membrane.

[0008] Optionally, the pressure valve is set to open when the pressure in the catheter body is greater than or equal to a threshold value, thereby allowing the anesthetic agent to flow through the outlet portion.

[0009] Optionally, the exhaust device is in the shape of a disk, and the axis of the disk passes through the conduit.

[0010] Optionally, the pressure threshold of the pressure valve is 0.5 bar to 1 bar.

[0011] Optionally, the first distance between the pressure valve and the exhaust device does not exceed 10 mm.

[0012] Optionally, the second distance between the pressure valve and the outlet portion does not exceed 10 mm.

[0013] Optionally, the cross-sectional diameter of the branch tube is 0.2 to 0.5 times the cross-sectional diameter of the catheter body.

[0014] The technical solution of the present invention provides an anesthetic extension catheter capable of exhausting air, which has the advantages of simple structure, convenient use, wide application range, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For purposes of illustration and not limitation, the present invention will now be described in terms of preferred embodiments thereof, with particular reference to the accompanying drawings, in which:

[0016] Figure 1 A perspective view of a ventable anesthesia extension catheter according to an exemplary embodiment of the present invention;

[0017] Figure 2 A front view of a ventilated anesthesia extension catheter according to an exemplary embodiment of the present invention;

[0018] Figure 3 A left side view of a ventable anesthesia extension catheter according to an exemplary embodiment of the present invention;

[0019] Figure 4 for Figure 3 Cross-sectional view of the local position of the middle circle frame.

[0020] In the figure: an inlet portion 10 , a conduit body 20 , a branch pipe 201 , an outlet portion 30 , an exhaust device 40 , a shell 401 , an exhaust hole 402 , a gas-liquid isolation membrane 403 , and a pressure valve 50 . DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms such as "installation" 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 a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figures 1 to 4 As shown, the anesthesia extension catheter with exhaustable embodiment of the present invention mainly includes: an inlet 10, a catheter body 20, an outlet 30, an exhaust device 40 and a pressure valve 50. The inlet 10, the catheter body 20 and the outlet 30 are connected in sequence, the inlet 10 is used to connect with the anesthesia syringe, and the outlet 30 is used to connect with the anesthesia needle. The exhaust device 40 is located on the catheter body 20 and connected thereto. The exhaust device 40 may include a housing 401, an exhaust hole 402 and a gas-liquid isolation membrane 403. The gas-liquid isolation membrane 403 allows gas to pass through and isolates liquid from passing through. The exhaust hole 402 is located on the surface of the housing 401 and serves as an exhaust outlet. The gas-liquid isolation membrane 403 is located inside the housing 401 and separates the catheter body 20 and the exhaust hole 402. The pressure valve 50 is located on the catheter body 20 and between the exhaust device 40 and the outlet 30. The pressure valve 50 can be set to close when the pressure in the catheter body 20 is less than a threshold value, so that the air in the catheter body 20 is discharged from the exhaust hole 402 after passing through the gas-liquid isolation membrane 403. The pressure valve 50 can also be set to open when the pressure in the catheter body 20 is greater than or equal to a threshold value, so that the anesthetic can flow through the outlet portion 30.

[0024] Specifically, a branch pipe 201 may be provided on the side wall of the conduit body 20 , and the exhaust device 40 is connected to the conduit body 20 through the branch pipe 201 .

[0025] The working process of the exhaustable anesthesia extension catheter of the embodiment of the present invention is as follows: the anesthetic liquid enters the catheter body 20 from the inlet 10, and at this time, the gas pressure in the catheter body 20 increases (slightly greater than the normal atmospheric pressure of the outside world), so the gas in the catheter body 20 passes through the catheter 201, and then passes through the gas-liquid isolation membrane 403 and is discharged from the exhaust hole 402. After the anesthetic liquid enters the exhaust device 40, the anesthetic liquid is blocked on the gas-liquid isolation membrane 403, and the gas-liquid isolation membrane 403 can no longer exhaust air. The pipeline pressure in the catheter body 30 further increases until it exceeds the preset pressure valve threshold, the pressure valve opens, and the anesthetic liquid flows out from the outlet 30. It can be understood that the exhaust device 40 provides a gas exhaust channel in the tube, and the pressure valve 5 is to make the gas pressure in the catheter greater than the pressure outside the gas-liquid isolation membrane, so that the air passes through the gas-liquid isolation membrane.

[0026] In the exhaustable anesthesia extension catheter of the embodiment of the present invention, an exhaust device and a pressure valve including a gas-liquid isolation membrane are provided, so that even if the medical staff forgets to exhaust the gas and directly starts the anesthesia injection, the air in the catheter body can be discharged from the gas-liquid isolation membrane, so that too much air will not be injected from the anesthesia needle into the human tissue to produce bubbles, thereby avoiding the bubbles affecting the ultrasonic image.

[0027] In the exhaustable anesthesia extension catheter of the exemplary embodiment of the present invention, preferably but not necessarily, the exhaust device 40 can be in the shape of a disk, and the axis of the disk passes through the catheter 201. This enables the exhaust device 40 to be close to the catheter body 20, reducing the total volume of the product, so as to facilitate use in a narrow surgical operating space.

[0028] In the exhaustable anesthesia extension catheter according to the exemplary embodiment of the present invention, the pressure threshold of the pressure valve 50 is 0.5 bar to 1 bar, and the exhaust effect is better within this numerical range.

[0029] In the exhaustable anesthesia extension catheter of the exemplary embodiment of the present invention, the catheter body 20 is preferably made of medical plastic, medical stainless steel, titanium alloy or the like, which is relatively hard and can provide structural support for the exhaust device 40 and the pressure valve 50 .

[0030] In the exhaustable anesthesia extension catheter of the exemplary embodiment of the present invention, the first distance between the pressure valve 50 and the exhaust device 40 does not exceed 10 mm. If the first distance is too far, the gas in the catheter body 20 may be compressed into smaller bubbles and remain near the pressure valve 50, which is difficult to be discharged through the catheter 201 and the exhaust device 40. In addition, the second distance between the pressure valve 50 and the outlet portion 30 does not exceed 10 mm. If the second distance is too far, it means that too much gas remains between the pressure valve 50 and the outlet portion 30, and this part of the gas cannot be discharged through the exhaust device 40.

[0031] In the exhaustable anesthesia extension catheter according to the exemplary embodiment of the present invention, the cross-sectional diameter of the catheter 201 is 0.2 to 0.5 times the cross-sectional diameter of the catheter body 20. Such a catheter 201 is relatively compatible with the size of the catheter body 20.

[0032] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anesthetic extension catheter capable of exhausting air, comprising an inlet portion (10), a catheter body (20) and an outlet portion (30) connected in sequence, characterized in that: Also includes: an exhaust device (40), the exhaust device (40) being located on the conduit body (20) and in communication therewith, comprising a shell (401), an exhaust hole (402) and a gas-liquid isolation membrane (403), the exhaust hole (402) being located on the surface of the shell (401), the gas-liquid isolation membrane (403) being located inside the shell (401) and separating the conduit body (20) and the exhaust hole (402); A pressure valve (50) is located on the conduit body (20) and between the exhaust device (40) and the outlet portion (30).

2. The exhaustable anesthesia extension catheter according to claim 1, characterized in that: A branch pipe (201) is provided on the side wall of the conduit body (20), and the exhaust device (40) is connected to the conduit body (20) through the branch pipe (201).

3. The exhaustable anesthesia extension catheter according to claim 1, characterized in that: The gas-liquid isolation membrane (403) allows gas to pass through and blocks liquid from passing through.

4. The exhaustable anesthesia extension catheter according to claim 1, characterized in that: The pressure valve (50) is set to close when the pressure in the catheter body (20) is less than a threshold value, so that the air in the catheter body (20) is discharged from the exhaust hole (402) after passing through the gas-liquid isolation membrane (403).

5. The exhaustable anesthesia extension catheter according to claim 1, characterized in that: The pressure valve (50) is set to open when the pressure in the catheter body (20) is greater than or equal to a threshold value, thereby allowing the anesthetic to flow through the outlet portion (30).

6. The exhaustable anesthesia extension catheter according to any one of claims 1 to 5, characterized in that: The exhaust device (40) is in the shape of a disk, and the axis of the disk passes through the conduit (201).

7. The exhaustable anesthesia extension catheter according to any one of claims 1 to 5, characterized in that: The pressure threshold of the pressure valve (50) is 0.5 bar to 1 bar.

8. The exhaustable anesthesia extension catheter according to any one of claims 1 to 5, characterized in that: A first distance between the pressure valve (50) and the exhaust device (40) does not exceed 10 mm.

9. The exhaustable anesthesia extension catheter according to any one of claims 1 to 5, characterized in that: The second distance between the pressure valve (50) and the outlet portion (30) does not exceed 10 mm.

10. The exhaustable anesthesia extension catheter according to claim 2, characterized in that: The cross-sectional diameter of the branch tube (201) is 0.2 to 0.5 times the cross-sectional diameter of the catheter body (20).

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