Radio frequency electrode

Abstract

The utility model provides a radio frequency electrode comprising an electrode assembly comprising an electrode tip, an electrode tube and a sleeve, the electrode tip is arranged at the far end of the electrode tube, and the electrode tube is slidably arranged in the sleeve in a penetrating manner; the brake assembly is connected with the electrode assembly and used for controlling the electrode tip to extend out of or retract into the sleeve; wherein the brake assembly is provided with a self-locking structure, and the self-locking structure is used for locking the electrode tube and the sleeve. The radio frequency electrode is provided with the self-locking structure, and the self-locking structure is used for locking the electrode tube and the sleeve, so that when the brake assembly drives the electrode tip to extend out, the self-locking structure can enable the electrode tip to keep a locking state, an operator does not need to manually press the electrode tip, the radio frequency electrode is convenient to use by the operator, and the operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, relate to a radio frequency electrode. BACKGROUND

[0002] With long-term sitting and unhealthy sitting posture of modern people, spinal disease shows a high incidence trend in recent years. In spinal surgery, radio frequency surgical electrode can be used for ablation, cutting and coagulation of soft tissue and hemostasis of blood vessels in operation.

[0003] The existing spinal surgery is mostly minimally invasive surgery under endoscope, which has small trauma, less bleeding and rapid recovery compared with open surgery. The minimally invasive surgery under endoscope has higher requirements for special surgical instruments. For example, the widely used radio frequency ablation electrode under endoscope can pass through the instrument channel of the spinal endoscope, and after reaching the lesion area, the electrode action end head is stretched out of the sleeve through the control handle to act on the operation site to realize the ablation, cutting or hemostasis function. However, the operator needs to continuously hold the handle part in the process of the existing surgical electrode to ensure the effective action of the electrode action end, which causes the operator's fatigue, inconvenient movement and reduces the operation efficiency. SUMMARY

[0004] The utility model discloses a radio frequency electrode with self-locking function, which is convenient for operators to use and improves the operation efficiency.

[0005] To achieve the above object, in the first aspect, the utility model provides a radio frequency electrode, which comprises:

[0006] An electrode assembly comprising an electrode head, an electrode tube and a sleeve, the electrode head is arranged at the distal end of the electrode tube, and the electrode tube is slidably arranged in the sleeve;

[0007] A brake assembly connected with the electrode assembly for controlling the electrode head to extend or retract in the sleeve;

[0008] The brake assembly has a self-locking structure for locking the electrode tube and the sleeve.

[0009] In some embodiments, the brake assembly comprises a guide tube and a movable piece.

[0010] The sleeve is arranged in the guide tube and fixedly connected with the guide tube.

[0011] The distal end of the movable piece is slidably arranged in the guide tube.

[0012] The electrode tube is fixedly connected with the movable piece.

[0013] When an axial force is applied to the movable member, the electrode head is extended or retracted from the sleeve.

[0014] In some embodiments, the side wall of the movable member is provided with a locking member having a locking protrusion, and the inner side wall of the guide tube is provided with a locking recess matching the locking protrusion.

[0015] The self-locking structure is formed when the locking protrusion cooperates with the locking recess, so as to fix the guide tube and the movable member.

[0016] In some embodiments, the proximal end of the guide tube is provided with an opening extending along the axial direction of the guide tube, and the locking recess is arranged near the side wall of the opening.

[0017] The proximal end of the locking member is fixedly connected with the side wall of the movable member, and the distal end of the locking member has a gap with the side wall of the movable member. The distal end of the locking member is provided with a button and the locking protrusion, and the button extends from the opening to the outside of the guide tube.

[0018] When a force is applied to the button to move the distal end of the locking member towards the gap, the locking protrusion is separated from the locking recess to complete the unlocking.

[0019] In some embodiments, the bottom of the locking protrusion and the bottom of the locking recess are both inclined towards the proximal end of the movable member, and the locking recess is a plurality of grooves arranged in the inner side wall of the guide tube.

[0020] When a force is applied to the movable member towards the distal end thereof, the movable member can move along the axial direction of the guide tube, and the locking protrusion can cooperate with any one of the plurality of grooves to be locked.

[0021] In some embodiments, the sleeve is provided with a liquid injection hole, and the side wall of the guide tube is provided with a liquid injection connector in communication with the liquid injection hole. The liquid injection connector is used to receive normal saline or liquid medicine and deliver the normal saline or liquid medicine to the tissue site through the sleeve.

[0022] In some embodiments, the brake assembly further comprises a first handle and a second handle.

[0023] The first handle is rotatably connected with the guide tube.

[0024] The second handle is rotatably connected with the movable member, and one end of the second handle is rotatably connected with one end of the first handle.

[0025] When a force is applied to the second handle to move it towards the first handle, the movable member drives the electrode head to extend from the sleeve.

[0026] In some embodiments, the radio frequency electrode further comprises a resilient member located in the guide tube;

[0027] The proximal end of the resilient member abuts against the distal end of the movable member, and the distal end of the resilient member abuts against the inner sidewall of the guide tube;

[0028] When the locking protrusion is separated from the locking recess to complete the unlocking, the resilient member releases the elastic force to drive the electrode head to retract into the sleeve.

[0029] In some embodiments, the radio frequency electrode further comprises a fixed member located in the guide tube and close to the distal end of the guide tube;

[0030] The fixed member is provided with a connecting hole in the axial direction thereof;

[0031] The sleeve passes through the connecting hole and is fixedly connected with the fixed member;

[0032] The resilient member is located between the fixed member and the movable member, and the proximal end of the resilient member abuts against the distal end of the movable member, and the distal end of the resilient member abuts against the proximal end of the fixed member.

[0033] In some embodiments, the brake assembly further comprises a plunger assembly;

[0034] The plunger assembly passes through the movable member and is fixedly connected with the movable member;

[0035] The electrode tube passes through the plunger assembly and is fixedly connected with the plunger assembly.

[0036] The radio frequency electrode provided by the utility model has the advantages that:

[0037] 1. The brake assembly has a self-locking structure, the self-locking structure is used for locking the electrode tube and the sleeve, so that when the electrode head is extended by the brake assembly, the self-locking structure can keep the electrode head in the locked state, the operator does not need to continuously press, the operator is convenient to use, and the efficiency of the operation is improved.

[0038] 2. The sidewall of the guide tube is provided with a liquid injection connector, physiological saline or liquid medicine can be connected, and is output to the required tissue part through the sleeve, so that the physiological saline or the liquid medicine is timely supplemented to the diseased tissue part during the operation, and the treatment effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The utility model provides the front view of the embodiment radio frequency electrode;

[0040] Figure 2 The utility model provides the perspective view of partial structure of the embodiment radio frequency electrode;

[0041] Figure 3 For Figure 2 Enlarged view at A in the middle;

[0042] Figure 4 For Figure 2 Enlarged view at B in the middle;

[0043] Figure 5 Structure schematic view of the embodiment guide pipe provided by the utility model;

[0044] Figure 6 Structure schematic view of the embodiment fixing piece provided by the utility model;

[0045] Figure 7 Exploded view of the embodiment plunger assembly provided by the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0047] Electrode assembly 1, electrode head 11, electrode tube 12, electrode wire 121, sleeve 13, brake assembly 2, guide pipe 21, locking recess 211, slit 212, accommodating cavity 213, rotating shaft 214, movable piece 22, flange ring 221,

[0048] Locking piece 23, locking convex part 231, button 232, gap 233, liquid injection connector 24, first handle 25, second handle 26, elastic piece 27, plunger assembly 28, cavity 281, O-ring 282, ring cap 283,

[0049] Fixing piece 3, connecting hole 31, wire plug 4. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below by combining with the drawings in the utility model. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by the person skilled in the art in the field to which the utility model belongs. The similar words such as "include" used in this paper mean that the elements or objects before the word cover the elements or objects listed after the word and its equivalent, and other elements or objects are not excluded. The "connection" described in this paper can be direct connection or indirect connection, that is, connection through intermediate objects, unless otherwise specified.

[0051] In addition, it needs to be understood that the "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicated in the present application are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The "first", "second" in the present application are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0052] The term "distal" herein refers to the end away from the operator and close to the patient; the term "proximal" refers to the end close to the operator and away from the patient.

[0053] In view of the problems of the prior art, the embodiments of the utility model provide a radio frequency electrode, as shown in the figure, Figures 1 to 3 As shown, the radio frequency electrode comprises an electrode assembly 1 and a brake assembly 2. Wherein, the electrode assembly 1 comprises an electrode head 11, an electrode tube 12 and a sleeve 13, the electrode head 11 is fixedly arranged at the distal end of the electrode tube 12, the electrode tube 12 is slidably arranged in the sleeve 13, the electrode tube 12 has an electrode wire 121, the distal end of the electrode wire 121 is electrically connected with the electrode head 11, the proximal end of the electrode wire 121 is connected with an external lead plug 4 through a lead wire, and the lead plug 4 is used for connecting an external radio frequency host. The brake assembly 2 is connected with the electrode assembly 1 and is used for controlling the electrode head 11 to extend out of or retract into the sleeve 13.

[0054] It needs to be explained that the brake assembly 2 has a self-locking structure, and the self-locking structure is used for locking the electrode tube 12 and the sleeve 13.

[0055] In the embodiment, the electrode tube 12 can be prepared by using insulating material, and the electrode tube 12 is used for insulating the internal electrode wire 121 from the outside. When the brake assembly 2 controls the electrode head 11 to extend out of the sleeve 13, the self-locking structure can lock the electrode tube 12 and the sleeve 13 with each other, so that the electrode tube 12 remains in the locked state without the operator continuously pressing the force, facilitating the operator to use, and improving the efficiency of the operation.

[0056] Reference is made to Figure 1 and Figure 3As shown in some embodiments, the brake assembly 2 comprises a guide tube 21 and a movable member 22, the sleeve 13 is arranged in the guide tube 21 and fixedly connected with the guide tube 21, the distal end of the movable member 22 is slidably arranged in the guide tube 21, and the electrode tube 12 is fixedly connected with the movable member 22.

[0057] When an axial force is applied to the movable member 22, the electrode head 11 is extended or retracted in the sleeve 13.

[0058] In the embodiment, when a force is applied to the movable member 22 in the direction of the electrode head 11, the movable member 22 moves into the guide tube 21, thereby driving the electrode head 11 to extend. When a force is applied to the movable member 22 away from the electrode head 11, the movable member 22 drives the electrode head 11 to retract into the sleeve 13.

[0059] Referring to Figure 1 , Figure 3 and Figure 4 , in some embodiments, the side wall of the movable member 22 is provided with a locking member 23, the locking member 23 has a locking protrusion 231, and the inner side wall of the guide tube 21 has a locking recess 211 matched with the locking protrusion 231. When the locking protrusion 231 cooperates with the locking recess 211, the self-locking structure is formed to fix the guide tube 21 and the movable member 22.

[0060] In the embodiment, when a force is applied to the movable member 22 in the direction of the electrode head 11, the movable member 22 moves into the guide tube 21, thereby driving the electrode head 11 to extend, and in the process, the locking protrusion 231 moves into the locking recess 211 to complete self-locking.

[0061] Further, in combination with Figure 5 , the proximal end of the guide tube 21 is provided with an opening 212 extending along the axial direction of the guide tube 21 to form a "U" shaped opening structure, and the locking recess 211 is arranged near the two side walls of the opening 212. The proximal end of the locking member 23 is fixedly connected with the side wall of the movable member 22, the distal end of the locking member 23 has a gap 233 with the side wall of the movable member 22, so that the locking member 23 has a certain deformation space, the distal end of the locking member 23 is provided with a button 232 and the locking protrusion 231, the locking protrusion 231 is located on both sides of the button 232, and the button 232 extends from the opening 212 to the outside of the guide tube 21.

[0062] When the radio frequency electrode is used, the operator exerts an upward force on the button 232, so that the distal end of the locking member 23 moves towards the gap 233, and the locking protrusion 231 is separated from the locking recess 211 to complete the unlocking. At this time, when a force is exerted on the movable member 22 in a direction away from the electrode head 11, the movable member 22 drives the electrode head 11 to retract into the sleeve 13, thereby protecting the electrode head 11.

[0063] It should be noted that in the present embodiment, the bottom of the locking protrusion 231 and the bottom of the locking recess 211 are both inclined towards the proximal end of the movable member 22, and the locking recess 211 is a plurality of grooves spaced apart on the inner wall of the guide tube 21. Each of the grooves can cooperate with the locking protrusion 231 to achieve locking, and each of the grooves corresponds to a certain distance of the electrode head 11 extending out.

[0064] When a force is exerted on the movable member 22 in a direction towards its distal end, the movable member 22 can move in the axial direction of the guide tube 21, and the locking protrusion 231 can cooperate with any one of the plurality of grooves to lock. It can be understood that, since the bottom of the locking protrusion 231 and the bottom of the locking recess 211 are both inclined towards the proximal end of the movable member 22, when a force is exerted on the movable member 22 in a direction towards its distal end and the force is greater than the force required for the distal end of the locking member 23 to deform, the locking protrusion 231 can sequentially slide through each of the grooves.

[0065] Referring to Figure 1 and Figure 5 In some embodiments, a liquid injection hole is formed on the sleeve 13, the liquid injection hole is in communication with the sleeve 13, the side wall of the guide tube 21 is provided with a liquid injection connector 24, the liquid injection connector 24 is in communication with the liquid injection hole, and the liquid injection connector 24 is used to receive normal saline or a drug solution and deliver the normal saline or the drug solution to a tissue site through the sleeve 13.

[0066] In the present embodiment, the liquid injection connector 24 can be a luer connector, and the liquid injection connector 24 is fixedly connected to the distal end of the guide tube 21 in a threaded structure.

[0067] During surgery, normal saline or a drug solution can be introduced through the liquid injection connector 24, the normal saline or the drug solution enters the sleeve 13 through the liquid injection connector 24 and flows to the electrode head 11, and is then input to a desired ablation tissue site from the electrode head 11. Normal saline or a drug solution can be supplemented in a timely manner to a lesion tissue site during surgery.

[0068] In other embodiments, the liquid injection connector 24 and the guide tube 21 can also be integrally formed.

[0069] Referring to Figure 1 , Figure 3 and Figure 5 , in some embodiments, the brake assembly 2 further comprises a first handle 25 and a second handle 26. The outer side wall of the guide tube 21 is provided with a rotating shaft 214, and the first handle 25 is rotatably connected to the guide tube 21 through the rotating shaft 214. Similarly, the second handle 26 can be matched with the rotating shaft provided on the outer side wall of the movable piece 22, so that the second handle 26 is rotatably connected to the movable piece 22, and one end of the second handle 26 is rotatably connected to one end of the first handle 25. When the second handle 26 is subjected to a force to move towards the first handle 25, the movable piece 22 drives the electrode head 11 to extend out of the sleeve 13.

[0070] In actual use, the operator only needs to hold the first handle 25 and the second handle 26 with one hand to move them towards each other, and cooperate with the locking structure, so as to realize the locking of the electrode head 11 after extension, and after locking, there is no need to tightly hold the first handle 25 and the second handle 26, thereby reducing the fatigue of the operator and increasing the convenience and efficiency during the operation.

[0071] Referring to Figure 1 and Figure 4 , in some embodiments, the brake assembly 2 further comprises a resilient piece 27 located in the guide tube 21. Specifically, the guide tube 21 has a containing cavity 213, the resilient piece 27 is located in the containing cavity 213, the distal end of the movable piece 22 is also located in the containing cavity 213, and the distal end of the movable piece 22 is provided with a flange ring 221 for abutting against the proximal end of the resilient piece 27, and the distal end of the resilient piece 27 abuts against the inner side wall of the guide tube 21. When the locking protrusion 231 is separated from the locking recess 211 to complete the unlocking, the resilient piece 27 releases the elastic force to drive the movable piece 22 to retract the electrode head 11 into the sleeve 13.

[0072] In the embodiment, the elastic member 27 can be a spring, the electrode tube 12 is fixedly connected with the movable member 22 through the spring, when the operator holds the first handle 25 and the second handle 26 to move them towards each other, the elastic member 27 is compressed and plays a certain damping effect. When the operation is completed, the force is applied to the button 232 to move the distal end of the locking member 23 towards the gap 233, the locking protrusion 231 is separated from the locking recess 211 to complete the unlocking, at this time, the elastic force of the elastic member 27 formed by compression is released to push the movable member 22 to reset, thereby driving the electrode head 11 to retract into the sleeve 13.

[0073] Referring to Figure 4 and Figure 6 As shown in the figure, in some embodiments, the radio frequency electrode further comprises a fixed member 3 arranged in the accommodating cavity 213 and close to the distal end of the guide tube 21, the fixed member 3 is provided with a connecting hole 31 along the axial direction, and the sleeve 13 passes through the connecting hole 31 and is fixedly connected with the fixed member 3.

[0074] In the embodiment, the fixed member 3 is detachably connected with the guide tube 21, for example, the fixed member 3 is clamped with the guide tube 21. By arranging the fixed member 3 in the guide tube 21, the auxiliary positioning effect of the sleeve 13 is achieved, and the position of the sleeve 13 is also convenient to be pre-fixed when the radio frequency electrode is assembled.

[0075] Referring to Figure 4 and Figure 7 As shown in the figure, in some embodiments, the brake assembly 2 further comprises a plunger assembly 28, the movable member 22 is provided with an installation channel, the plunger assembly 28 passes through the installation channel and is fixedly connected with the movable member 22, the electrode tube 12 passes through the plunger assembly 28 and is fixedly connected with the plunger assembly 28, and the electrode wire 121 can pass through the installation channel and be electrically connected with the wire plug 4 outside the movable member 22.

[0076] In the embodiment, the plunger assembly 28 is arranged in the installation channel, and the electrode tube 12 is connected with the plunger assembly 28, so as to ensure the stability of the electrode tube 12 when moving.

[0077] Specifically, the plunger assembly 28 comprises a cavity 281, an O-ring 282 and a ring cap 283. The electrode tube 12 passes through the cavity 281, the O-ring 282 and the ring cap 283 in sequence, the O-ring 282 is located in the ring cap 283, the ring cap 283 is threadedly connected with the cavity 281, and the ring cap 283 is fixedly connected with the installation channel.

[0078] The above merely illustrates the specific implementation of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited to this. Any change or replacement within the technical scope disclosed by the embodiments of the present application should be covered in the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. A radio frequency electrode, characterized by, The application relates to an electrode assembly and a brake assembly. The electrode assembly comprises an electrode head, an electrode tube and a sleeve, the electrode head is arranged at the distal end of the electrode tube, and the electrode tube is slidably arranged in the sleeve. The brake assembly is connected with the electrode assembly and is used for controlling the electrode head to extend out of or retract into the sleeve. The brake assembly has a self-locking structure for locking the electrode tube and the sleeve.

2. The radio frequency electrode of claim 1, wherein, The brake assembly comprises a guide tube and a movable element. The sleeve is arranged in the guide tube and is fixedly connected with the guide tube. The distal end of the movable element is slidably arranged in the guide tube. The electrode tube is fixedly connected with the movable element. When an axial force is applied to the movable element, the electrode head is driven to extend out of or retract into the sleeve.

3. The radio frequency electrode of claim 2, wherein, The side wall of the movable element is provided with a locking element, the locking element has a locking protrusion, and the inner side wall of the guide tube has a locking recess matched with the locking protrusion. When the locking protrusion and the locking recess are matched, the self-locking structure is formed to fix the guide tube and the movable element.

4. The radio frequency electrode of claim 3, wherein, The proximal end of the guide tube is provided with an opening, the opening extends along the axial direction of the guide tube, and the locking recess is arranged on the side wall close to the opening. The proximal end of the locking element is fixedly connected with the side wall of the movable element, the distal end of the locking element has a gap with the side wall of the movable element, the distal end of the locking element is provided with a button and the locking protrusion, and the button extends from the opening to the outside of the guide tube. When a force is applied to the button to move the distal end of the locking element towards the gap, the locking protrusion is separated from the locking recess to complete unlocking.

5. The radio frequency electrode of claim 3, wherein, The bottom of the locking protrusion and the bottom of the locking recess are inclined towards the proximal end of the movable element, and the locking recess is a plurality of grooves arranged in the inner side wall of the guide tube. When a force is applied to the movable element towards the distal end of the movable element, the movable element can move along the axial direction of the guide tube, and the locking protrusion can be matched with any one of the plurality of grooves to be locked.

6. The radio frequency electrode of claim 2, wherein, The sleeve is provided with a liquid injection hole, the side wall of the guide tube is provided with a liquid injection connector, the liquid injection connector is communicated with the liquid injection hole, the liquid injection connector is used for receiving normal saline or liquid medicine and conveying the normal saline or liquid medicine to a tissue site through the sleeve.

7. The radio frequency electrode according to any of claims 2 to 6, characterized in that The brake assembly further comprises a first handle and a second handle. The first handle is rotatably connected with the guide tube. The second handle is rotatably connected with the movable element, and one end of the second handle is rotatably connected with one end of the first handle. When a force is applied to the second handle to move the second handle towards the first handle, the movable element drives the electrode head to extend out of the sleeve.

8. The radio frequency electrode of claim 4, wherein, The brake assembly further comprises an elastic element arranged in the guide tube. The proximal end of the elastic element abuts against the distal end of the movable element, and the distal end of the elastic element abuts against the inner side wall of the guide tube. When the locking protrusion is separated from the locking recess to complete unlocking, the elastic element releases elastic force to drive the movable element to retract the electrode head into the sleeve.

9. The radio frequency electrode of claim 8, wherein, The brake assembly further comprises a fixing element arranged in the guide tube and close to the distal end of the guide tube. The fixing member is provided with a connecting hole along its axial direction; The sleeve passes through the connecting hole and is fixedly connected with the fixing member; The elastic member is located between the fixing member and the movable member, and the proximal end of the elastic member abuts against the distal end of the movable member, and the distal end of the elastic member abuts against the proximal end of the fixing member.

10. The radio frequency electrode of claim 9, wherein, The brake assembly further comprises a plunger assembly; The plunger assembly passes through the movable member and is fixedly connected with the movable member; The electrode tube passes through the plunger assembly and is fixedly connected with the plunger assembly.

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