Puncture needle for epidural intracavitary surgery

Abstract

The utility model relates to a puncture needle for an operation in an epidural space, belongs to the technical field of medical instruments, and solves the technical problem that a soft fiber lens is easy to touch nerves and other tissues in the epidural space when being inserted. The puncture needle comprises a needle handle, a needle tube, a needle head and a steering assembly, the needle head comprises a fixed section, a steering section and a connecting part, and the steering section can rotate towards the opening direction of the needle head around the connecting part; the steering assembly comprises a traction wire and a control component, one end of the traction wire is fixed to the opening of the steering section, the other end of the traction wire is connected with the control component, and the control component is movably connected with the needle handle. A through hole for containing the traction wire is formed in the needle tube and the fixed section, and an opening in one end of the through hole is formed in the opening of the fixed end. The puncture needle can control and adjust the insertion direction of the fiber soft lens in the body, so that the fiber soft lens is prevented from touching other tissues such as nerves in an epidural space, the safety and the success rate of an epidural space operation are improved, and the occurrence rate of postoperative complications is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a puncture needle used for epidural surgery. Background Art

[0002] Exploration and surgery within the epidural space using a fiberscope requires inserting a puncture needle outside the body to establish a surgical channel. However, due to the narrow epidural space and the dense concentration of nerves and other tissues, the puncture channel often exists at an angle to the epidural space. The curved section of the fiberscope only controls the rotation of the front lens, but cannot control the insertion direction of the tube and lens. This can cause the fiberscope to collide with other tissues within the epidural space when inserted and near the lesion. Utility Model Content

[0003] In view of the above analysis, the embodiment of the present invention aims to provide a puncture needle for epidural surgery to solve the technical problem that the fiberscope is prone to touching the nerves and other tissues in the epidural space during insertion.

[0004] The purpose of this utility model is mainly achieved through the following technical solutions:

[0005] A puncture needle for epidural surgery comprises a needle handle, a needle tube, a needle and a steering assembly; the needle comprises a fixed section, a steering section and a connecting portion, the steering section is provided at the end of the needle and is rotatably connected to the fixed section, the rotation axis of the steering section is located on the open end face of the needle, and the two connecting portions are symmetrically arranged on the rotation axis of the steering section and are both connected to the fixed section and the steering section; the steering assembly comprises a pulling wire and a control component, one end of the pulling wire is fixed at the opening of the steering section, and the other end is connected to the control component, and the control component is movably connected to the needle handle.

[0006] Furthermore, the control component is rotatably connected to the needle handle.

[0007] Furthermore, the rotation axis of the control component is parallel to the rotation axis of the steering section.

[0008] Furthermore, evenly distributed convex teeth are provided on the periphery of the control component, and a clamping strip matching the convex teeth is provided on the needle handle.

[0009] Furthermore, the control component is slidably connected to the needle handle, and the sliding direction of the control component is the same as the direction of the axis of the needle tube.

[0010] Furthermore, a through hole for accommodating the pulling wire is provided in the needle tube and the fixed section, and one end of the through hole is opened at the opening of the fixed section.

[0011] Furthermore, it also includes a limiting frame, and the limiting frame and the needle handle are detachably connected.

[0012] Furthermore, the limiting frame includes a telescopic bracket, and the protruding end of the telescopic bracket is provided with an arc-shaped support plate.

[0013] Furthermore, the connecting portion is an elastic steel sheet, and the connecting portion is formed integrally with the fixed section and the steering section.

[0014] Furthermore, the connecting portion is made of medical plastic.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0016] (1) The puncture needle used for epidural surgery of the present invention can accurately control and adjust the insertion direction of the fiberscope in the body by providing a steering section on the needle head, so that the end of the fiberscope can smoothly reach the preset position and avoid touching other tissues such as nerves in the epidural space, thereby improving the safety and success rate of epidural surgery and reducing the incidence of postoperative complications.

[0017] (2) The puncture needle used for epidural surgery of the present invention is more directly controllable in terms of the rotational force applied to the steering section by providing a control component and a pulling wire, and can accurately adjust the direction of the end of the fiberscope. It has a simple structure and is easy to operate. It can also meet the requirement of pulling the puncture needle out of the body after the fiberscope reaches the position.

[0018] (3) The puncture needle used for epidural surgery of the present invention can fix the steering section in the optimal direction by providing a locking structure between the control component and the needle handle, thereby ensuring that the steering direction of the fiberscope remains fixed during insertion.

[0019] (4) The puncture needle used for epidural surgery of the present invention is simple and easy to use and manufacture by providing an elastic sheet-type connection part, and does not increase the thickness of the tube wall at the connection part, thereby saving space and not causing other damage to the skin during the puncture process.

[0020] (5) The puncture needle used for epidural surgery of the present invention can prevent the puncture needle from increasing its penetration depth into the body when inserting the fiberscope by providing a limit frame, thereby reducing the surgical risk and ensuring that the fiberscope obtains a more stable and precise surgical position.

[0021] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following content, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the text and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference symbols denote the same components.

[0023] Figure 1 Schematic diagram of the overall structure of the puncture needle of specific embodiment 1;

[0024] Figure 2 This is one of the partial structural diagrams of the puncture needle of specific embodiment 1;

[0025] Figure 3 This is a second schematic diagram of the partial structure of the puncture needle of specific embodiment 1;

[0026] Figure 4 Schematic diagram of the overall structure of the puncture needle of specific embodiment 2;

[0027] Figure 5 Schematic diagram of the structure of the limiting frame of the puncture needle in specific embodiment 2.

[0028] Reference numerals:

[0029] 1-needle head; 11-fixed section; 12-steering section; 13-connecting part; 2-needle tube; 3-needle handle; 31-clip strip; 4-steering assembly; 41-control component; 411-convex tooth; 42-pulling wire; 43-through hole; 5-limiting frame; 51-telescopic bracket; 512-support plate; 513-positioning point. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0031] A specific embodiment of the present invention is as follows Figure 1 、 Figure 2 As shown, the utility model provides a puncture needle for epidural surgery, comprising a needle 1, a needle tube 2, a needle handle 3 and a steering assembly 4. The opening of the needle 1 is an inclined surface, and the symmetry plane of the inclined surface coincides with the axis of the needle tube 2. The needle 1 is a split structure, comprising a fixed section 11, a steering section 12 and a connecting portion 13. The interface between the fixed section 11 and the steering section 12 is perpendicular to the symmetry plane and intersects with the inclined surface. A section of the needle tip direction of the needle 1 is the steering section 12. The fixed section 11 and the steering section 12 are rotatably connected by two connecting portions 13. The two connecting portions 13 are provided at the opening of the needle 1 and are symmetrically arranged on both sides of the symmetry plane, so that the steering section 12 can rotate around the two connecting portions 13 toward the opening direction of the fixed section 11.

[0032] The steering assembly 4 includes a control component 41 , which is connected to the needle handle 3 . When the puncture needle penetrates the body to a preset position, the steering section 12 can be controlled to rotate by operating the control component 41 .

[0033] When performing fiberscope surgery in the epidural space, the puncture needle of this embodiment, together with the matching needle core, is inserted into the body. When the needle head 1 reaches the preset position in the epidural space, the needle core is withdrawn, and a fiberscope suitable for the epidural space is inserted. When the hard end of the fiberscope is completely exposed from the puncture needle opening, the fiberscope is first operated to rotate the end toward the lesion, and then the fiberscope is further inserted into the body. At the same time, the control component 41 is operated externally to rotate the steering section 12 toward the opening of the fixed section 11. Under the pressure of the steering section 12, the body of the fiberscope bends when passing through the needle opening, so that the end faces the cavity channel of the epidural space. At this time, the fiberscope is further inserted into the puncture needle until the end of the fiberscope reaches the vicinity of the lesion tissue in the epidural space.

[0034] The puncture needle of this embodiment, by providing a turning section 12 on the needle head 1, can accurately control and adjust the insertion direction of the fiberscope in the body, so that the end of the fiberscope can smoothly reach the preset position, and can also avoid touching the nerves and other tissues in the epidural space, thereby improving the safety and success rate of epidural space surgery and reducing the incidence of postoperative complications.

[0035] like Figure 2 As shown, illustratively, the steering assembly 4 further includes a pulling wire 42 and a through hole 43; there are two through holes 43 for passing the pulling wire 42, and the through hole 43 is parallel to the axis of the needle tube 2, passing through the tube wall of the needle tube 2 and the fixed section 11, and the two through holes 43 are symmetrically arranged on both sides of the symmetry plane. The corresponding pulling wires 42 are also provided in two pieces, one end of the pulling wire 42 is fixed at the opening of the steering section 12, and the other end is fixed to the control component 41. On the inclined surface of the needle head 1 opening, the two pulling wires 42 pass through the through holes 43 on the fixed section 11, and then fit on the end faces of the fixed section 11 and the steering section 12, and the ends are fixedly connected to the steering section 12.

[0036] Preferably, on the inclined surface of the opening of the needle 1 , the fixing point on the deflection section 12 of the pulling wire 42 and the openings of the two through holes 43 on the fixing section 11 are arranged symmetrically.

[0037] When the control component 41 is operated externally to pull the pull wires 42 toward the needle handle 3, the end surface of the steering section 12 is pulled by the two pull wires 42, causing the steering section 12 to rotate about the two connecting portions 13 toward the opening of the fixed section 11. This simple structure and convenient operation allow for more direct and controllable rotational force applied to the steering section 12, enabling precise adjustment of the fiberscope's tip direction. Furthermore, the pull wires 42 do not interfere with the operation and movement of the fiberscope during the pulling process. Furthermore, once the fiberscope reaches its desired position, the puncture needle can be pulled externally if needed.

[0038] like Figure 3 As shown, the control member 41 is rotatably connected to the needle handle 3. Specifically, the control member 41 is a cylindrical knob, the center of which is provided with the rotation axis of the control member 41. The rotation axis of the control member 41 is perpendicular to the plane of symmetry and is fixedly connected to the needle handle 3 at both ends, allowing the control member 41 to rotate on the needle handle 3 about the rotation axis. The outer periphery of the control member 41 is provided with evenly distributed protruding teeth 411, and the needle handle 3 is provided with a clamping strip 31 that matches the protruding teeth 411 to fix the rotation angle of the control member 41.

[0039] When the protruding teeth 411 are rotated to rotate the control member 41 on the needle handle 3, since one end of the pulling wire 42 is fixed to the control member 41, the other end of the pulling wire 42 will be wound around the circumference of the control member 41 as the control member 41 rotates. When the steering section 12 is in the optimal direction and needs to stop rotating, the control member 41 will be locked due to the limiting effect of the clamping strip 31 on the protruding teeth 411, thereby fixing the steering section 12 at the corresponding rotation angle, ensuring that the direction of the fiberscope remains fixed during insertion.

[0040] Optionally, the control member 41 may be slidably connected to the needle handle 3. When the control member 41 slides toward the end of the needle handle, the pull wire 42 can pull the steering section 12 to rotate. Similarly, multiple fixing points are provided between the control member 41 and the needle handle 3, which can fix the steering section 12 in the optimal direction.

[0041] Optionally, the connecting portion 13 is an elastic steel sheet formed integrally with the fixed section and the steering section. Medical plastic or silicone can also be used to meet the elastic deformation of the connecting portion 13 when the steering section 12 rotates.

[0042] Example 2

[0043] like Figure 4 As shown, the puncture needle for epidural surgery in this embodiment is different from that in embodiment 1 in that the puncture needle in this embodiment further includes a limiting frame 5 .

[0044] like Figure 5As shown, considering that when the fiberscope is inserted into the puncture needle, the fiberscope will apply a reaction force to the puncture needle along its axial direction when turning, in order to ensure that the puncture needle does not increase the depth of penetration into the body, the puncture needle also includes a limit frame 5, which is detachably fixed at the connection between the needle handle 3 and the needle tube 2. The limit frame 5 includes a telescopic bracket 51, and the protruding end of the telescopic bracket 51 is provided with an arc-shaped support plate 512.

[0045] After the puncture needle reaches the preset position and before inserting the fiberscope, the stopper 5 is placed around the outer periphery of the needle tube 2, with one end resting against the lower end surface of the needle handle 3. The telescopic bracket 51 is extended, allowing the curved surface of the support plate 512 to rest at a suitable position near the puncture point to maintain the desired insertion depth. The curved bottom surface of the support plate 512 effectively supports the puncture needle at various angles to the skin, achieving effective support without damaging the patient's skin.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A puncture needle for epidural surgery, characterized in that: It comprises a needle handle (3), a needle tube (2), a needle (1) and a steering assembly (4); The needle head (1) comprises a fixed section (11), a turning section (12) and a connecting portion (13); the turning section (12) is provided at the end of the needle head (1) and is rotatably connected to the fixed section (11); the rotation axis of the turning section (12) is located on the open end face of the needle head (1); the two connecting portions (13) are symmetrically arranged on the rotation axis of the turning section (12) and are both connected to the fixed section (11) and the turning section (12); The steering assembly (4) comprises a pulling wire (42) and a control component (41), one end of the pulling wire (42) is fixed at the opening of the steering section (12), and the other end is connected to the control component (41), and the control component (41) is movably connected to the needle handle (3).

2. The puncture needle for epidural surgery according to claim 1, characterized in that: The control component (41) is rotatably connected to the needle handle (3).

3. The puncture needle for epidural surgery according to claim 2, characterized in that: The rotation axis of the control component (41) is parallel to the rotation axis of the steering section (12).

4. The puncture needle for epidural surgery according to claim 3, characterized in that: The outer periphery of the control component (41) is provided with evenly distributed convex teeth (411), and the needle handle (3) is provided with a clamping strip matching the convex teeth (411).

5. The puncture needle for epidural surgery according to claim 1, characterized in that: The control component (41) is slidably connected to the needle handle (3), and the sliding direction of the control component (41) is the same as the direction of the axis of the needle tube (2).

6. The puncture needle for epidural surgery according to claim 1, characterized in that: A through hole (43) for accommodating the pulling wire (42) is provided in the needle tube (2) and the fixed section (11), and one end opening of the through hole (43) is provided at the opening of the fixed section (11).

7. The puncture needle for epidural surgery according to claim 1, characterized in that: It also includes a limiting frame (5), and the limiting frame (5) and the needle handle (3) are detachably connected.

8. The puncture needle for epidural surgery according to claim 7, characterized in that: The limiting frame (5) comprises a telescopic bracket (51), and an arc-shaped support plate (512) is provided at the protruding end of the telescopic bracket (51).

9. The puncture needle for epidural surgery according to any one of claims 1 to 8, characterized in that: The connecting portion (13) is an elastic steel sheet, and the connecting portion (13) is formed integrally with the fixing section (11) and the turning section (12).

10. The puncture needle for epidural surgery according to any one of claims 1 to 8, characterized in that: The connecting portion (13) is made of medical plastic.

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