Angle adjustable spinal coagulation electrode

Abstract

The application discloses an angle-adjustable spine coagulation electrode, which comprises a cutter head assembly, a fixed body and a movable wire clamp; the cutter head assembly comprises an insulating rod, an inner tube and an outer tube, two electrodes insulated from each other are arranged at one end of the insulating rod, each electrode is connected with a conductive wire, and each conductive wire penetrates through the other end of the insulating rod and is connected with a cable; a first chamber and a second chamber are arranged in the fixed body and are communicated, a steel pipe clamp and a screw cap are fixed to the other end of the first chamber, first and second handles are arranged outside the fixed body; a reset spring is arranged in the first chamber; the movable wire clamp comprises a small-diameter section and a large-diameter section, and a third handle is arranged outside the movable wire clamp. The angle of the cutter head can be adjusted through axial extension and retraction and circumferential rotation of the cutter head by using one hand, the operation range is small, the cutter head rotates more smoothly, the use is more convenient, and the demand for multi-angle coagulation in spine surgery can be met.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an angle-adjustable spinal coagulation electrode. Background Technology

[0002] Routine procedures for percutaneous endoscopic discectomy (PED) include discectomy, annulus fibrosus removal, unprotected lumbar discectomy (UBE), and interbody fusion. A coagulation electrode widely used in these procedures includes a hinged handle (see US07905882B1) or a U-shaped handle (see US7101370B2). The hinged handle has a hinged connection between the front and rear handles, with through holes on both. Before surgery, the front and rear handles are fixed to the front and rear sleeves of the scalpel through these holes, allowing for free extension and retraction of the scalpel tip during surgery, resulting in more precise operation. The U-shaped handle is a one-piece, flexible, U-shaped component, with both ends fixed to the front and rear sleeves of the scalpel. During surgery, the scalpel tip is freely extended and retracted by squeezing the U-shaped handle. However, both of these methods can only control the axial extension and retraction of the blade tip. In practice, it is often necessary to adjust the angle of the blade tip. At this time, the doctor needs to hold the handle and rotate the handle as a whole by wrist movement. This limits the adjustable angle. On the other hand, since percutaneous endoscopic discectomy usually requires the use of parallel surgical instruments, such as laser fiber, irrigation suction device, biopsy forceps, illumination fiber, endoscope, etc., the coagulation electrode usually requires multiple people to operate when working with these parallel surgical instruments. The range of motion of rotating the handle by wrist movement may be large, thus affecting the operation of other instruments. Therefore, although adjusting the blade tip angle is a simple action, it is inconvenient for the entire operation. To address this problem, the invention patent with application number 202110920155.7 provides an angle-adjustable spinal radiofrequency ablation electrode blade tip, which realizes the axial extension and retraction and circumferential rotation of the blade tip. However, when rotating the blade tip, one hand needs to hold the handle and the other hand or other people's assistance is needed to rotate the blade tip circumferentially, which is still inconvenient to use. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides an angle-adjustable spinal coagulation electrode. The operator can adjust the blade angle by axial extension and circumferential rotation with one hand. The operation is minimal, the blade rotation is smoother, and it is more convenient to use, meeting the multi-angle coagulation needs in spinal surgery.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0005] An angle-adjustable spinal coagulation electrode is provided, comprising a blade assembly, a fixed body for mounting the blade assembly, and a movable clamp for extending, retracting, and rotating the blade assembly. The blade assembly is fixedly connected to the movable clamp. The blade assembly includes an insulating rod, with an inner tube and an outer tube nested sequentially around the insulating rod. One end of the insulating rod has two electrodes that are insulated from each other, each electrode being connected to a conductive wire. Each conductive wire passes through to the other end of the insulating rod and is connected to a cable. The fixed body has a first chamber and a second chamber that communicate with each other. One end of the first chamber is fixedly connected to the outer tube. The fixed body has a first handle and a second handle on its exterior. The first chamber has a return spring that cooperates with the movable clamp. The movable clamp includes a small-diameter section that cooperates with the first chamber and a large-diameter section that cooperates with the second chamber. The movable clamp is movably mounted in the fixed body through the small-diameter section and the large-diameter section. The movable clamp has a third handle on its exterior.

[0006] Furthermore, the first handle is located on the top rear side of the fixed body, and the second handle is located on the bottom front side of the fixed body. The second handle is located at the front end of the first handle, and the length of the second handle is greater than the length of the first handle.

[0007] Furthermore, a snap-fit ​​protrusion is provided on the outside of the small-diameter section to cooperate with the first chamber, and several first steel balls are evenly distributed on the snap-fit ​​protrusion.

[0008] Furthermore, the bottom of the first chamber is provided with an anti-detachment latch, and an anti-detachment limiting protrusion that cooperates with the latching protrusion is locked and fixed inside the anti-detachment latch.

[0009] Furthermore, the outer side of the large-diameter section is provided with several damping elastic elements that cooperate with the second chamber, and each damping elastic element is provided with a second steel ball.

[0010] Furthermore, the second chamber is provided with several axially protruding beams, and a groove is formed between adjacent axially protruding beams to cooperate with the second steel ball.

[0011] Furthermore, the damping elastic element is a rubber column or a spring sheet.

[0012] Furthermore, a steel pipe clamp for fixing the outer tube is provided at one end of the first chamber, and a screw cap is threadedly connected to the outside of the steel pipe clamp.

[0013] Furthermore, the movable line clamp has several top beads on the side that fits against the fixed body.

[0014] Furthermore, the conductive wire is provided with an anti-rotation part, which is strip-shaped.

[0015] Furthermore, the insulating rod is equipped with an insulating sheet that separates the two electrodes, and the insulating sheet is integrated with the insulating rod.

[0016] The beneficial effects of this invention are as follows:

[0017] The coagulation electrode of this invention, without changing user habits (currently, spinal coagulation electrodes on the market all use the hinged handle or U-shaped handle mentioned in the background art, which controls the extension and retraction of the blade head by squeezing with the palm or fingers, and doctors are already accustomed to this operating method), has a first handle and a second handle on the fixed body, and a third handle on the movable wire clamp. The position and shape of the three handles are set to perfectly conform to the force exertion habits of human fingers and palms, making the adjustment of axial extension and circumferential rotation convenient and reliable. The operator can adjust the blade head angle with one hand while keeping the blade head extended.

[0018] The cutter head assembly of the present invention is fixedly mounted on a fixed body by an outer tube, and the inner tube and insulating rod are fixedly connected to a movable clamp. The movable clamp can drive the cutter head assembly to extend, retract, and rotate.

[0019] The present invention has a first handle and a second handle on the outside of the fixed body, and a third handle on the outside of the movable clamp. The operator can rotate the third handle with his palm to rotate the blade head, or he can rotate the third handle with his fingers to rotate the blade head. The finger control of the blade head rotation is more flexible and can achieve 360° blade head angle adjustment.

[0020] The first chamber of the present invention is provided with a reset spring. The reset spring, together with the snap-fit ​​protrusion of the movable wire clamp, can realize the reset of the cutter head assembly after extension and retraction. At the same time, the bottom of the second chamber is provided with an anti-disengagement limiting protrusion. The anti-disengagement limiting protrusion, together with the snap-fit ​​protrusion, can prevent the small diameter section of the movable wire clamp from disengaging from the first chamber.

[0021] Compared with the existing technology that uses the wrist to rotate the entire handle, the present invention allows for greater flexibility in rotating the third handle with the thumb, enabling 360° adjustment of the blade angle.

[0022] The coagulation electrode of this invention is equipped with a rotational damping mechanism, which consists of a sliding groove in the second chamber and a damping elastic element on the movable wire clamp. This mechanism allows the movable wire clamp to drive the cutting head to rotate smoothly. The cutting head of this invention can both extend and retract axially and rotate circumferentially to adjust the cutting head angle, meeting the multi-angle coagulation requirements in spinal surgery. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the existing technology;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0026] Figure 4 This is a cross-sectional view of the overall structure in this invention;

[0027] Figure 5 This is a partial structural diagram of the cutter head assembly;

[0028] Figure 6 This is a structural diagram of the fixed main body;

[0029] Figure 7 This is a schematic diagram of the movable wire clamp.

[0030] Figure 8 This is a schematic diagram illustrating how the invention is held during use;

[0031] Figure 9 This is a schematic diagram illustrating the rotation of the invention via the palm during use.

[0032] Figure 10 This is a schematic diagram illustrating the rotation of the invention using a finger during use;

[0033] The symbols for the main components in the diagram are explained below:

[0034] 1. Cutter head assembly; 11. Electrode; 12. Inner tube; 13. Outer tube; 14. Insulating rod; 15. Insulating sheet; 16. Conductive wire; 17. Anti-rotation part; 18. Cable;

[0035] 2. Fixed body; 21. Steel pipe clamp; 22. Screw cap; 23. First chamber; 24. Second chamber; 25. Return spring; 26. First handle; 27. Second handle; 28. Anti-detachment limiting protrusion; 29. ​​Slide groove; 210. Axial protruding beam;

[0036] 3. Movable clamp; 31. Small diameter section; 32. Large diameter section; 33. Third handle; 34. Snap-fit ​​protrusion ring; 35. First steel ball; 36. Damping elastic element; 37. Second steel ball; 38. Top ball. Detailed Implementation

[0037] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0038] like Figure 1As shown, most commercially available spinal coagulation electrodes use hinged or U-shaped handles, with the blade tip controlled by squeezing with the palm or fingers. Doctors are accustomed to this method of operation. However, during surgery, it is often necessary to adjust the blade tip angle to accommodate different tissue locations within the target area. In this case, the handle must be pinched, and the blade tip rotated by wrist rotation. However, the wrist's adjustment range is limited, sometimes forcing the doctor to move to access the target tissue, significantly hindering the smooth execution of the surgery. Therefore, the angle-adjustable spinal coagulation electrode of this invention is proposed.

[0039] like Figure 2 , 3 As shown in Figure 4, the angle-adjustable spinal coagulation electrode includes a blade assembly 1, a fixed body 2 for mounting the blade assembly 1, and a movable clamp 3 for driving the blade assembly 1 to extend, retract, and rotate. The blade assembly 1 is fixedly connected to the movable clamp 3.

[0040] like Figure 5 As shown, the cutter head assembly 1 includes an insulating rod 14, with an inner tube 12 and an outer tube 13 nested around it. One end of the insulating rod 14 has two electrodes 11 separated by insulation, each electrode 11 connected to a conductive wire 16. Each conductive wire 16 extends to the other end of the insulating rod 14 and is connected to a cable 18. An insulating sheet 15 is provided on the insulating rod 14 to separate the two electrodes 11. The insulating sheet 15 is integrally designed with the insulating rod 14. The inner tube 12 is fitted over the insulating rod 14 to strengthen it and prevent jamming when the insulating rod 14 extends or retracts the cutter head. The outer tube 13 is fitted over the insulating rod 14 and the inner tube 12, with its front end folded backward circumferentially to prevent the cutter head from scraping during extension or retraction. Two channels are provided on the insulating rod 14, and two conductive wires 16 extend from the front ends of the two channels and are connected to two electrodes 11 respectively. Each electrode wire 16 is also provided with an anti-rotation part 17, which is strip-shaped and has a width greater than the diameter of the electrode wire. The anti-rotation part 17 abuts against the inside of the channel to prevent the electrode wire 16 from rotating within the channel. The rear ends of the two electrode wires 16 extend into the movable clamp 3 and are respectively fixed to the protrusions on the inner wall of the movable clamp 3. The ends of the two electrode wires are also connected to the main unit via cables. The main unit is connected to a pedal for controlling the power supply to the cutter head. The protruding part of the cutter head of the insulating rod 14 is pre-bent. When the cutter head of the insulating rod 14 extends out of the outer tube 13, it will form a certain deflection angle with the axial direction of the outer tube 13. The pre-bending treatment of the insulating rod 14 is existing technology; relevant patents and technical documents can be consulted.

[0041] like Figure 6As shown, the fixed body 2 has a first chamber 23 and a second chamber 24 that are connected. One end of the first chamber 23 is fixedly connected to the outer tube 13, and a steel pipe clamp 21 for fixing the outer tube 13 is provided at one end of the first chamber 23. A screw cap 22 is threadedly connected to the outside of the steel pipe clamp 21. A return spring 25 that cooperates with the movable clamp 3 is provided in the first chamber 23. The steel pipe clamp 21 is provided with a clamping through hole for clamping the outer tube 13, and the screw cap is provided with a clearance through hole for installing the outer tube 1. The steel pipe clamp 21 has several radially open slots. The steel pipe clamp 21 is a flexible, multi-lobed structure, with each lobe being conical. It is fitted onto the outer surface of the outer pipe 13 and placed inside the movable clamp 3 and the screw cap 22. The front side of the steel pipe clamp 21 has a conical portion, and the screw cap 22 has a conical constriction portion that mates with the conical portion. The rear inner surface of the screw cap 22 and the outer front surface of the fixing body 2 are threaded together, connecting them to press the steel pipe clamp 21 tightly, thereby fixing the outer pipe 12 to the fixing body 2. The fixing body 2 has a first handle 26 and a second handle 27 on its exterior. The first handle 26 is located at the rear top of the fixing body 2, and the second handle 27 is located at the front bottom of the fixing body 2, positioned at the front end of the first handle 26. The length of the second handle 27 is greater than the length of the first handle 26. The second handle 27 is located axially at the front end of the first handle 26. The length of the second handle 27 is greater than the length of the first handle 26. More specifically, the length of the second handle 27 is set to accommodate one, two or three of the middle, ring and little fingers to hold at the same time, and the length of the first handle 26 is set to accommodate the index finger to hold alone or the index finger and middle finger to hold at the same time.

[0042] like Figure 7As shown, the movable clamp 3 includes a small-diameter section 31 that mates with the first chamber 23 and a large-diameter section 32 that mates with the second chamber 24. The movable clamp 3 is movably installed inside the fixed body 2 via the small-diameter section 31 and the large-diameter section 32. A locking protrusion 34 that mates with the first chamber is provided outside the small-diameter section 31. Several first steel balls 35 are evenly distributed on the locking protrusion 34. The first steel balls 35 are evenly distributed on the circumference of the locking protrusion 34, with two rows arranged circumferentially. One end of the return spring 25 abuts against the inner wall of the first chamber, and the other end abuts against the locking protrusion 34. An anti-disengagement slot is provided at the bottom of the first chamber. An anti-disengagement limiting protrusion 28 that mates with the locking protrusion 34 is locked and fixed inside the anti-disengagement slot. By engaging the locking protrusion 34 with the anti-disengagement limiting protrusion 28, the movable clamp 3 can be prevented from disengaging from the fixed body 2. The outer surface of the large-diameter section 32 is provided with several damping elastic elements 36 that cooperate with the second chamber. The damping elastic elements 36 are preferably rubber pillars or spring sheets, and each damping elastic element 36 is provided with a second steel ball 37. The second chamber 24 is provided with several axial protruding beams 210, and a groove 29 is formed between adjacent axial protruding beams 210 to cooperate with the second steel ball 37. The second steel ball 37 is inserted into any of the grooves 29. The second steel ball 37, the damping elastic elements 36 and the damping elastic elements 36 form a rotary damping mechanism. The rotary damping mechanism can provide damping force when the movable wire clamp 3 rotates, so that the movable wire clamp 3 drives the cutter head assembly 1 to rotate more smoothly, and the rotation and angle adjustment of the cutter head assembly 1 are more controllable.

[0043] The movable clamp 3 is externally provided with a third handle 33. The third handle 33 has at least one arc-shaped part adapted to the physiological curve of the thumb, and several top beads 38 are provided on the side of the third handle 33 opposite to the end face of the fixed body 2. The top beads 38 perform extension and retraction limiting to avoid extreme contact between the fixed body 2 and the movable clamp 3. On the other hand, when the distance between the fixed body 2 and the movable clamp 3 is at its limit, the contact area between the fixed body 2 and the movable clamp 3 is reduced during rotation, so that smooth rotation can be achieved at that position. The cable 18 extends into the third handle 33 and connects to the end of the conductive wire 16. The other end of the cable 18 is connected to the main unit.

[0044] Working process and its principle: such as Figure 8 , 9As shown in Figures 1 and 10, the index finger alone or simultaneously with the index and middle fingers holds the first handle 26, while one, two, or three of the middle, ring, and little fingers simultaneously hold the second handle 27. The thumb or palm rests against the third handle 27. Pressing the third handle 27 controls the extension of the blade, which is in a curved shape. With the blade extended, rotating the sleeve with the thumb or palm rotates the double-lobed electrode to reach the lesion. Stepping on the pedal conducts electricity, and the two electrodes 11 at the front end generate plasma for coagulation. Compared with the prior art, which uses the wrist to rotate the entire handle, this invention offers greater flexibility in rotating the third handle with the thumb, enabling 360° blade angle adjustment. Furthermore, this invention allows for the extension, retraction, and rotation of the blade with a single hand.

Claims

1. An angle-adjustable spinal coagulation electrode, characterized in that, It includes a cutter head assembly (1) and a fixed body (2) for mounting the cutter head assembly (1), and a movable wire clamp (3) for driving the cutter head assembly (1) to extend, retract and rotate, wherein the cutter head assembly (1) and the movable wire clamp (3) are fixedly connected; The cutter head assembly (1) includes an insulating rod (14), with an inner tube (12) and an outer tube (13) nested around the insulating rod (14) in sequence. One end of the insulating rod (14) is provided with two electrodes (11) that are insulated from each other. Each electrode (11) is connected to a conductive wire (16), and each conductive wire (16) extends through to the other end of the insulating rod (14) and is connected to a cable (18). The fixed body (2) is provided with a first chamber (23) and a second chamber (24) that are connected. One end of the first chamber (23) is fixedly connected to the outer tube (13). The fixed body (2) is provided with a first handle (26) and a second handle (27) on the outside. The first chamber (23) is provided with a return spring (25) that cooperates with the movable clamp (3). The movable clamp (3) includes a small diameter section (31) that mates with the first chamber (23) and a large diameter section (32) that mates with the second chamber (24). The movable clamp (3) is movably installed in the fixed body (2) through the small diameter section (31) and the large diameter section (32). A third handle (33) is provided on the outside of the movable clamp (3). The first handle (26) is located on the top rear side of the fixed body (2), and the second handle (27) is located on the bottom front side of the fixed body (2). The second handle (27) is located at the front end of the first handle (26), and the length of the second handle (27) is greater than the length of the first handle (26). The small diameter section (31) is provided with a snap-fit ​​protrusion (34) that mates with the first chamber (23), and a number of first steel balls (35) are evenly distributed on the snap-fit ​​protrusion (34). The large-diameter section (32) is provided with a number of damping elastic elements (36) that cooperate with the second chamber (24), and each of the damping elastic elements (36) is provided with a second steel ball (37). The second chamber (24) is provided with a plurality of axial protrusions (210), and a groove (29) is formed between adjacent axial protrusions (210) to cooperate with the second steel ball (37). The movable clamp (3) has several top beads (38) on the side that fits against the fixed body (2).

2. The angle-adjustable spinal coagulation electrode according to claim 1, characterized in that, The bottom of the first chamber (23) is provided with an anti-detachment latch, and an anti-detachment limiting protrusion (28) that cooperates with the latching protrusion ring (34) is fixedly engaged in the anti-detachment latch.

3. The angle-adjustable spinal coagulation electrode according to claim 1, characterized in that, One end of the first chamber (23) is provided with a steel pipe clamp (21) for fixing the outer tube (13), and the steel pipe clamp (21) is externally threaded with a screw cap (22).

4. The angle-adjustable spinal coagulation electrode according to claim 1, characterized in that, The conductive wire (16) is provided with an anti-rotation part (17), which is strip-shaped.

5. The angle-adjustable spinal coagulation electrode according to claim 1, characterized in that, An insulating sheet (15) is provided on the insulating rod (14) to separate the two electrodes (11), and the insulating sheet (15) is integrated with the insulating rod (14).

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