Plug-in soft-tip anesthesia catheter

Abstract

The utility model discloses a plug-in soft-head anesthesia catheter, including a catheter body, a flexible section connected to the front end of the catheter body, at least one liquid outlet hole arranged at one end of the catheter body close to the flexible section, the hardness of the catheter body is greater than the hardness of the flexible section, the catheter body and the flexible section are both rubber hoses, a flattening section is arranged at the front end of the catheter body, and the flattening section and the flexible section are hot-melted into one after plug-in assembly. The catheter body of the utility model utilizes the flattening section and the flexible section to be plugged in and then hot-melted, and compared with the existing butt hot-melt connection, the fusion area is large, so the flexible section is firmly connected and not easy to loosen and fall off, and has the advantages of simple structure and low production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a plug-in soft-head anesthesia catheter. Background Art

[0002] During anesthesia, the medical staff will puncture the epidural needle into the patient's body, then pull out the pen-tip anesthesia needle inserted in the epidural needle, and then introduce the epidural catheter into the patient's body through the epidural needle. Finally, the medical staff will inject anesthetic into the epidural space through the epidural catheter to block the spinal nerve roots, causing temporary paralysis of the area it controls, causing the pain to disappear and the muscles to relax to meet the needs of the operation.

[0003] The existing epidural catheter is a rubber tube with certain toughness and rigidity, one end of which is a blind end, and at least one liquid outlet is set at the rear position of the blind end, which is used to introduce the externally injected anesthetic agent into the patient's epidural space. However, since the situation of the epidural catheter in the patient's body cannot be observed during the implementation of epidural block anesthesia, it can only be operated based on the experience of medical staff. The hardness of the epidural catheter is relatively large, and it is easy for its end to penetrate the spinal dura mater or blood vessels during the process of introducing the epidural catheter into the epidural space, causing the liquid outlet of the epidural catheter to be blocked by a coagulated hard mass or blood clot, and even the epidural catheter may injure the spinal nerves, thereby causing anesthesia failure or serious medical accidents.

[0004] Patent document CN210785900U discloses an epidural catheter for anesthesia, which has a flexible portion connected to the end of a rubber tube. The flexible portion can bend in time when subjected to a large axial thrust applied by the alignment of the hose and the resistance applied by the dura mater, thereby preventing the hose from puncturing the dura mater, blood vessels, or even injuring internal spinal nerves, and preventing blood clots from blocking the fluid outlet of the epidural catheter. However, the flexible portion of the structure is butt-welded to the end of the hose, so the connection is not strong enough and there is a risk of the flexible portion falling off.

[0005] Patent document CN112516434B discloses an anesthesia catheter, wherein a softening portion is coaxially arranged at the front end of the catheter body, and the softening portion and the catheter body are connected by a metal wire. Patent document CN101845290A discloses an elastic softening liquid for the head of a cardiac anesthesia catheter and a preparation and use method thereof, wherein the head of a nylon cardiac anesthesia catheter to be softened is immersed in the softening liquid to obtain an elastic softening anesthesia catheter. The softening portions at the front ends of both anesthesia catheters are not easy to fall off, but the former has a complex structure, and the latter has a cumbersome chemical treatment process and a high cost. Utility Model Content

[0006] In order to eliminate the risk of the front flexible head of a soft-tip anesthesia catheter falling off, the utility model provides a plug-in soft-tip anesthesia catheter.

[0007] The technical solution adopted by the utility model is as follows: a plug-in soft-tip anesthesia catheter, comprising a catheter body, a flexible section connected to the front end of the catheter body, at least one liquid outlet hole arranged at one end of the catheter body close to the flexible section, the hardness of the catheter body being greater than that of the flexible section, the catheter body and the flexible section both being rubber hoses, a flattened section arranged at the front end of the catheter body, and the flattened section and the flexible section being hot-fused into one after being plugged in and assembled.

[0008] Preferably, the front end of the flexible section is provided with a round end.

[0009] Preferably, the flexible section is a conical structure that is smaller in the front and larger in the back, and the cone angle is 0.3-0.5°.

[0010] Preferably, the length of the flattened section is 1 / 3 to 1 / 2 of the length of the flexible section.

[0011] Preferably, the length of the flexible segment is 5-8 mm.

[0012] Preferably, the hardness of the catheter body is a plastic Mohs hardness of M60 to M80, and the hardness of the flexible section is a plastic Mohs hardness of M20 to M40.

[0013] The utility model has the following beneficial effects: the catheter body of the utility model utilizes the flattened section and the flexible section to be plugged in and then hot-melt connected. Compared with the existing butt hot-melt connection, the welding area is large, so the flexible section is firmly connected and not easy to loosen and fall off, and it has the advantages of simple structure and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0015] Figure 2 It is a cross-sectional schematic diagram of the hot melt flattening mold in the embodiment of the utility model.

[0016] Figure 3 It is a cross-sectional schematic diagram of the hot melt welding mold in the embodiment of the utility model.

[0017] The catheter body 1, the flexible section 2, the liquid outlet 3, the flattened section 4, the round end 5, the flattening mold 6, and the welding mold 7. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the embodiments and drawings.

[0019] In the embodiment, Figure 1As shown, a plug-in soft-head anesthesia catheter includes a catheter body 1, a flexible section 2 is connected to the front end of the catheter body 1, at least one liquid outlet 3 is provided at one end of the catheter body 1 near the flexible section 2, the hardness of the catheter body 1 is greater than the hardness of the flexible section 2, the catheter body 1 and the flexible section 2 are both rubber hoses, and the front end of the catheter body 1 is provided with a flattening section 4, which is hot-melted into one after being plugged and assembled with the flexible section 2. The hardness of the catheter body 1 is M60-M80, and the hardness of the flexible section 2 is M20-M40. It can be made of plastic materials such as nylon and PVC. In addition to having a certain hardness, it also has a certain rigidity and toughness. The catheter body 1 of this embodiment uses the flattening section 4 to be plugged with the flexible section 2 and then hot-melted. Compared with the existing butt hot-melt connection, the fusion area is large, so the flexible section 2 is firmly connected and not easy to loosen and fall off, and it has the advantages of simple structure and low production cost.

[0020] In the embodiment, Figure 1 As shown, the front end of the flexible section 2 is provided with a rounded end 5. The rounded end 5 is used to reduce the stimulation of the flexible section 2 to the dura mater during the introduction of the anesthesia catheter.

[0021] In the embodiment, Figure 1 As shown, the flexible section 2 is a conical structure with a small front and a large back, and a vertebral angle of 0.3-0.5°. This structure is conducive to the epidural needle of the anesthesia catheter and is easy to operate.

[0022] In the embodiment, Figure 1 As shown, the length of the flattened section 4 is 1 / 3 to 1 / 2 of the length of the flexible section 2. Specifically, the full length of the flexible section 2 is 5 to 6 mm, and the length of the flattened section 4 is about 2.5 mm, so the truly soft length of the flexible section 2 is 2.5 to 3.5 mm, which will not affect the function of the catheter body 1 itself, but can prevent the dura mater, blood vessels, and even internal spinal nerves from being punctured, and prevent blood clots from blocking the outlet of the epidural catheter.

[0023] In the embodiment, Figure 2 As shown in FIG. 1 , a flattening mold 6 is provided. The catheter body 1 is inserted into the flattening mold 6 for heating and hot melting, thereby processing a flattening section 4 at the front end of the catheter body 1. Figure 3 As shown, it is a welding mold 7. After the catheter body 1 and the flexible section 2 are plugged and assembled, the welding mold 7 is inserted for heating and hot melting, so as to realize the hot melting connection between the flexible section 2 and the flattened section 4. At the same time, the welding mold 7 plays a molding role on the round end 5.

[0024] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A plug-in soft-tip anesthesia catheter, comprising a catheter body (1), the front end of the catheter body (1) being connected to a flexible section (2), the end of the catheter body (1) close to the flexible section (2) being provided with at least one liquid outlet (3), the hardness of the catheter body (1) being greater than the hardness of the flexible section (2), and characterized in that: The catheter body (1) and the flexible section (2) are both rubber hoses. A flattened section (4) is provided at the front end of the catheter body (1). The flattened section (4) and the flexible section (2) are plugged together and then hot-fused into one.

2. The plug-in soft-tip anesthesia catheter according to claim 1, characterized in that: The front end of the flexible section (2) is provided with a round end (5).

3. The plug-in soft-tip anesthesia catheter according to claim 1, characterized in that: The flexible section (2) is a conical structure that is smaller at the front and larger at the back, with a cone angle of 0.3-0.5°.

4. The pluggable soft-tip anesthesia catheter according to claim 1, characterized in that: The length of the flattened section (4) is 1 / 3 to 1 / 2 of the length of the flexible section (2).

5. The pluggable soft-tip anesthesia catheter according to claim 1 or 4, characterized in that: The length of the flexible section (2) is 5 to 8 mm.

6. The pluggable soft-tip anesthesia catheter according to claim 1, characterized in that: The hardness of the catheter body (1) is a plastic Mohs hardness of M60 to M80, and the hardness of the flexible section (2) is a plastic Mohs hardness of M20 to M40.

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