CN211243686U - Needle electrode for radiofrequency ablation - Google Patents
Needle electrode for radiofrequency ablation Download PDFInfo
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- CN211243686U CN211243686U CN201921453081.5U CN201921453081U CN211243686U CN 211243686 U CN211243686 U CN 211243686U CN 201921453081 U CN201921453081 U CN 201921453081U CN 211243686 U CN211243686 U CN 211243686U
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Abstract
The utility model discloses a needle electrode for radiofrequency ablation. The electrode comprises a handle, an electrode working end, a power line, a front sleeve, a rear sleeve and a spring, wherein two ends of the handle are respectively connected with the front sleeve and the rear sleeve; the front end of the front sleeve is provided with a front chuck, and the front end and the rear end of the rear sleeve are respectively provided with a tail chuck and a rear chuck; a protective hose and a conductive wire are arranged in the working end of the electrode, a gap is arranged between the working end of the electrode and the protective hose, the conductive wire is positioned in the protective hose, the front ends of the protective hose and the conductive wire are both connected with an electrode tool bit, the rear end of the conductive wire is connected with a power line, and the electrode tool bit extends out of the front end of the working end of the electrode; the front chuck and the tail chuck are fixedly connected with the working end of the electrode. The utility model has the advantages of flexible electrode cutter head, controllable locking, flushing, large ablation range and accurate and controllable treatment area.
Description
Technical Field
The utility model relates to a medical instrument for spinal surgery, in particular to a needle electrode for radiofrequency ablation.
Background
The lumbar intervertebral disc protrusion is a common disease and frequently encountered diseases of clinical spinal surgery, can be clearly diagnosed after clinical examination and imaging examination of spinal surgeons, and has a plurality of methods for treating the lumbar intervertebral disc protrusion, wherein the minimally invasive low-temperature plasma radio frequency ablation is one of the international new technologies for treating the lumbar intervertebral disc protrusion at present. The principle of the low-temperature plasma radio frequency ablation is as follows: the radio frequency energy is acted inside the intervertebral disc through the plasma knife, the nucleus pulposus tissue of the part of the intervertebral disc is vaporized and ablated, and then the nucleus pulposus tissue contacted with the cutter head is heated to about 70 ℃ by utilizing an accurate thermal shrinkage technology, so that the volume of the nucleus pulposus is reduced, the pressure in the intervertebral disc is reduced, and the compression of the herniated intervertebral disc on nerve roots is relieved, and the purpose of treatment is achieved. The minimally invasive low-temperature plasma radio frequency ablation has the following advantages: 1. the safety is high: the working temperature of the plasma is 40-70 ℃, the plasma is safe at low temperature, small in wound without operation, and capable of protecting the fiber ring wall to the maximum extent and not damaging normal intervertebral disc tissues; the bone structure is not damaged in the operation, and the influence on the stability of the spine is small; 2. the wound is small, bleeding hardly occurs during operation, only 1mm pinhole scar exists on local skin, the appearance is not influenced, the recovery is fast, and the lower bottom can be discharged after 2 to 3 days after the operation.
The electrode cutter head of the currently used radio frequency ablation needle cannot be bent, when the electrode cutter head enters an intervertebral disc for ablation, ablation can be performed only in a certain limited range, the treatment range is relatively small, and the electrode cutter head cannot be accurately controlled, so that the operation effect is not ideal.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a needle electrode for radiofrequency ablation that electrode tool bit flexible, steerable locking, can wash, melt the scope big, treatment area is accurate controllable, can carry out the operation safely fast.
The utility model provides a technical scheme that above-mentioned problem adopted is: the needle electrode for radiofrequency ablation comprises a handle, an electrode working end and a power line, and is structurally characterized by further comprising a front sleeve, a rear sleeve and a spring, wherein the handle is U-shaped, two ends of the handle are respectively connected with the front sleeve and the rear sleeve, and the spring is positioned in the front sleeve; the front end of the rear sleeve is positioned in the front sleeve and can move along the inner wall of the front sleeve, and the front end of the rear sleeve is tightly contacted with the spring; the front end of the front sleeve is provided with a front chuck, the front end of the rear sleeve is provided with a tail chuck, and the rear end of the rear sleeve is provided with a rear chuck; a protective hose and a conductive wire are arranged in the electrode working end, a gap is formed between the inner wall of the electrode working end and the outer wall of the protective hose, the conductive wire is positioned in the protective hose, the front ends of the protective hose and the conductive wire are connected with an electrode tool bit, the rear end of the conductive wire is connected with a power line, and the electrode tool bit extends out of the front end of the electrode working end; the front chuck and the tail chuck are both fixedly connected with the working end of the electrode, wherein the tail chuck is connected with the tail end of the working end of the electrode; the rear chuck is fixedly connected with the tail end of the protective hose.
The front end of conductive wire has been crooked to the arc before the assembly.
Rear sleeve's front end is the echelonment, comprises first ladder, second ladder and third ladder, and the diameter of second ladder is less than the diameter of first ladder and third ladder, first ladder, third ladder and preceding sheathed tube inner wall clearance fit.
The utility model discloses preceding sleeve pipe on be provided with rotatable locking key, the locking that is equipped with the evagination on the locking key is detained, is equipped with the locking mouth on preceding sheathed tube body, the locking is detained accessible locking mouth and is contacted with the sheathed tube front end in back, and the locking is detained and is equipped with the locking insection on its and the sheathed tube contact surface in back.
Be equipped with the locating pin on the body of preceding sheathed tube, the locating pin is located between sheathed tube first ladder and the third ladder of back, and is provided with the location insection that contacts with the locating pin on the second ladder.
The utility model discloses still including preceding locking cap head and back locking cap head, preceding sheathed tube front end and preceding locking cap head threaded connection, back sheathed tube rear end and back locking cap head threaded connection.
The utility model discloses the front end of preceding locking cap head still is provided with the injection and washes the cap head, and the injection is washed and is equipped with the injection on the cap head and washes the mouth, and electrode work end is equipped with the injection flushing hole at its position that washes a mouthful corresponding with the injection, and the injection flushing hole is linked together with the space.
Compared with the prior art, the utility model, following beneficial effect has: 1. the front end of the conductive wire of the needle electrode for radiofrequency ablation is bent into an arc shape before assembly, the conductive wire is straightened under the action of the working end of the electrode after being assembled in the protective hose, the rear sleeve is driven by the handle to move forwards along the front sleeve during use, the rear end of the protective hose is fixed with the rear chuck in the rear sleeve, the rear end of the working end of the electrode is fixed with the front chuck and the tail chuck in the front sleeve, and the rear end of the protective hose moves forwards along with the rear sleeve along with the forward movement of the rear sleeve, so that the front ends of an electrode cutter head, the protective hose and an electric guide wire are driven to extend out of the working end of the electrode, and the conductive wire is restored into the bent arc shape; when the needle electrode for radiofrequency ablation is used for ablation, the ablation range can be expanded and the treatment area can be increased by bending the electrode tool bit; 2. the needle electrode for radiofrequency ablation is a ladder shape formed by a first ladder, a second ladder and a third ladder at the front end of a rear sleeve, wherein the diameter of the second ladder is smaller than the diameters of the first ladder and the third ladder, the first ladder and the third ladder are in clearance fit with the inner wall of the front sleeve, then a positioning pin is arranged on the front sleeve and is positioned between the moving strokes of the first ladder and the third ladder, so that the movement of the rear sleeve is limited, the positioning pin abuts against the first ladder in an initial state, an electrode cutter head does not extend at the moment, when the rear sleeve moves forwards until the positioning pin abuts against the third ladder, the maximum moving stroke is achieved, the extension length of the bending part of the electrode cutter head is maximum at the moment, and therefore, the extension length of the electrode cutter head can be controlled through a control handle, a treatment area is accurately controlled, and a very ideal operation effect is achieved; 3. the needle-shaped electrode for radiofrequency ablation is provided with an injection flushing cap head on the front locking cap head, the injection flushing cap head is provided with an injection flushing port, the working end of the electrode is provided with an injection flushing hole at the position corresponding to the injection flushing port, the injection flushing hole is communicated with a gap between the working end of the electrode and a protective hose, the injection flushing port is used for injecting flushing medicaments, and the medicaments flow into a patient body from the injection flushing port through the injection flushing hole and the gap, so that medicaments can be injected for cooling flushing or diminishing inflammation and relieving pain and the like while the intervertebral disc is ablated, and the treatment effect is further improved; 4. compared with the traditional electrode device, the needle electrode for radiofrequency ablation integrates compression, ablation and hemostasis, has extremely small working channel, simple operation, short operation time, good hemostatic effect and reduced postoperative infection, and reduces the trauma of the operation and the pain of the operation by increasing or reducing the plasma energy to perform the functions of compression, ablation or hemostasis.
Drawings
Fig. 1 is a schematic structural diagram (initial state) of the present invention.
Fig. 2 is a sectional view (initial state) of the present invention.
Fig. 3 is an enlarged view of fig. 2 at a.
Fig. 4 is an enlarged view of fig. 2 at B.
Fig. 5 is a schematic structural diagram (working state) of the present invention.
Fig. 6 is a sectional view (operating state) of the present invention.
Fig. 7 is an enlarged view of fig. 6 at C.
Fig. 8 is a partial cross-sectional view of the injection cap head and the injection port of the present invention.
Fig. 9 is a partial cross-sectional view of the locking key of the present invention.
Fig. 10 is a schematic structural view of the locking key of the present invention.
Fig. 11 is a cross-sectional view taken along line D-D of fig. 10.
Fig. 12 is a usage state diagram of the present invention.
Fig. 13 is an enlarged view of fig. 12 at E.
Fig. 14 is a use state diagram of the present invention.
Detailed Description
Referring to fig. 1-13, the present embodiment includes a handle 1, an electrode working end 2, a power cord 3, a front sleeve 4, a rear sleeve 5 and a spring 8, wherein the handle 1 is U-shaped for ergonomics, and two ends of the handle are respectively connected with the front sleeve 4 and the rear sleeve 5. The spring 8 is positioned in the front sleeve 4; the front end of the rear sleeve 5 is positioned in the front sleeve 4 and can move along the inner wall of the front sleeve 4, and the front end of the rear sleeve 5 is tightly contacted with the spring 8; the front end of the front sleeve 4 is provided with a front chuck 14, the front end of the rear sleeve 5 is provided with a tail chuck 16, and the rear end of the rear sleeve 5 is provided with a rear chuck 15. A protective hose 12 and a conductive wire 13 are arranged in the electrode working end 2, a gap 18 is arranged between the inner wall of the electrode working end 2 and the outer wall of the protective hose 12, the conductive wire 13 is positioned in the protective hose 12, the front ends of the protective hose 12 and the conductive wire 13 are both connected with an electrode tool bit 11, the rear end of the conductive wire 13 is connected with a power line 3, and the electrode tool bit 11 extends out of the front end of the electrode working end 2. The front end of the conductive wire 13 is bent into an arc shape before being assembled, and is straightened by the electrode working end 2 after the conductive wire 13 is assembled into the protective hose 12, but is restored to the arc shape when the front end thereof protrudes from the electrode working end 2. The front chuck 14 and the tail chuck 16 are fixedly connected with the electrode working end 2, wherein the front chuck 14 tightly clamps the position close to the tail end of the electrode working end 2, and the tail chuck 16 is fixedly welded with the tail end of the electrode working end 2. The rear clamp 15 tightly clamps the rear end of the protection hose 12 so as to be fixedly coupled thereto.
The front end of the rear sleeve 5 is in a step shape and comprises a first step 501, a second step 502 and a third step 503, the diameter of the second step 502 is smaller than the diameters of the first step 501 and the third step 503, and the first step 501 and the third step 503 are in clearance fit with the inner wall of the front sleeve 4, so that the front end of the rear sleeve 5 moves along the inner wall of the front sleeve 4.
The front sleeve 4 is provided with a locking key 19 which can be controlled in a rotating way, the locking key 19 is provided with a convex locking buckle 20, the pipe body of the front sleeve 4 is provided with a locking opening 21, the locking buckle 20 can be contacted with the front end of the rear sleeve 5 through the locking opening 21, and the locking buckle 20 is provided with locking insections 22 on the contact surface of the locking buckle 20 and the rear sleeve 5.
Be equipped with locating pin 23 on the pipe shaft of preceding sleeve pipe 4, when the front end of back sleeve pipe 5 removed along the inner wall of preceding sleeve pipe 4, locating pin 23 was located between the first ladder 501 of back sleeve pipe 5 and the removal stroke of third ladder 503 to play limiting displacement to back sleeve pipe 5, and be provided with the location insection 24 that contacts with locating pin 23 on the second ladder 502, location insection 24 plays the effect of increasing friction power.
The embodiment further comprises a front locking cap head 6 and a rear locking cap head 7, the front end of the front sleeve 4 is in threaded connection with the front locking cap head 6, and the rear end of the rear sleeve 5 is in threaded connection with the rear locking cap head 7. The injection flushing cap head 9 is arranged on the front locking cap head 6, the injection flushing cap head 9 is provided with an injection flushing port 10, the electrode working end 2 is provided with an injection flushing hole 17 at a position corresponding to the injection flushing port 10, the injection flushing hole 17 is communicated with a gap 18 between the electrode working end 2 and the protective hose 12, the injection flushing port 10 is used for injecting a medicament, and the medicament flows into a patient body from the injection flushing port 10 through the injection flushing hole 17 and the gap 18, so that the medicament for cooling flushing or diminishing inflammation and relieving pain can be injected while the intervertebral disc is ablated, and the treatment effect is further improved.
Referring to fig. 3, in the initial state, the positioning pins 23 abut against the first step 501 of the rear sleeve 5, so that the rear sleeve 5 cannot move toward the rear end. The locking key is not pressed at this time and the locking catch 20 is positioned above the first step 501.
Referring to fig. 7, 9, 12-14, in use, an operator holds the handle 1, pulls the handle 1, presses the locking key 19, pushes the rear sleeve 5 to move forward along the inner wall of the front sleeve 4, the rear sleeve 5 compresses the spring 8, the locking insection 22 on the locking buckle 20 is in close contact with the first step 501, when the first step 501 moves a short distance forward, the first step 501 is staggered with the locking insection 22, the locking insection 22 is in contact with the second step 502, and the locking insection 22 plays a role in increasing friction force. With the forward movement of the rear sleeve 5, the rear chuck 15 moves forward along with the rear sleeve 5, the protective hose 12 clamped by the rear chuck 15 also moves forward, the electrode working end 2 is fixed by the front chuck 14 and the tail chuck 16, the front ends of the electrode cutter head 11, the protective hose 12 and the conductive wire 13 extend out of the electrode working end 2, and the conductive wire 13 is restored to be in a curved arc shape, so that the electrode cutter head 11 is curved. The protruding length of the bent portion of the electrode tip 11 is controlled by the operator through the control handle 1, and is the maximum moving stroke when the rear sleeve 5 is advanced to the position pin 23 abutting against the third step 503, at which the protruding length of the bent portion of the electrode tip 11 is the maximum. Referring to fig. 9, in use, an operator can also hold the handle 1, pull the handle 1 and press the locking key 19, when the locking buckle 20 is located between the first step 501 and the front sleeve 4, the handle 1 is released, the locking key 19 is fixed between the rear sleeve 5 and the front sleeve 4, the rear sleeve 5 cannot move forward along the inner wall of the front sleeve 4, the extending length of the bent portion of the electrode bit 11 is locked, and the locking key 19 plays a role in locking the extending length of the electrode bit 11, so that the operator can conveniently perform surgical operation.
Claims (7)
1. A needle electrode for radiofrequency ablation, which comprises a handle (1), an electrode working end (2) and a power line (3), and is characterized in that: the handle (1) is U-shaped, two ends of the handle are respectively connected with the front sleeve (4) and the rear sleeve (5), and the spring (8) is positioned in the front sleeve (4); the front end of the rear sleeve (5) is positioned in the front sleeve (4) and can move along the inner wall of the front sleeve (4), and the front end of the rear sleeve (5) is tightly contacted with the spring (8); a front chuck (14) is arranged at the front end of the front sleeve (4), a tail chuck (16) is arranged at the front end of the rear sleeve (5), and a rear chuck (15) is arranged at the rear end of the rear sleeve (5); a protective hose (12) and a conductive wire (13) are arranged in the electrode working end (2), a gap (18) is arranged between the inner wall of the electrode working end (2) and the outer wall of the protective hose (12), the conductive wire (13) is positioned in the protective hose (12), the front ends of the protective hose (12) and the conductive wire (13) are both connected with an electrode tool bit (11), the rear end of the conductive wire (13) is connected with a power line (3), and the electrode tool bit (11) extends out of the front end of the electrode working end (2); the front chuck (14) and the tail chuck (16) are both fixedly connected with the electrode working end (2), wherein the tail chuck (16) is connected with the tail end of the electrode working end (2); the rear clamping head (15) is fixedly connected with the tail end of the protective hose (12).
2. The needle electrode for radio frequency ablation according to claim 1, wherein: the front end of the conductive wire (13) is bent into an arc shape before assembly.
3. The needle electrode for radio frequency ablation according to claim 1, wherein: the front end of the rear sleeve (5) is in a step shape and consists of a first step (501), a second step (502) and a third step (503), the diameter of the second step (502) is smaller than that of the first step (501) and the third step (503), and the first step (501) and the third step (503) are in clearance fit with the inner wall of the front sleeve (4).
4. The needle electrode for radio frequency ablation according to claim 1, wherein: the front sleeve (4) is provided with a rotatable locking key (19), the locking key (19) is provided with a convex locking buckle (20), the pipe body of the front sleeve (4) is provided with a locking opening (21), the locking buckle (20) can be contacted with the front end of the rear sleeve (5) through the locking opening (21), and the locking buckle (20) is provided with locking insections (22) on the contact surface of the locking buckle (20) and the rear sleeve (5).
5. The needle electrode for radio frequency ablation according to claim 1 or 3, characterized in that: the pipe body of the front sleeve (4) is provided with a positioning pin (23), the positioning pin (23) is positioned between a first step (501) and a third step (503) of the rear sleeve (5), and a positioning insection (24) which is in contact with the positioning pin (23) is arranged on the second step (502).
6. The needle electrode for radio frequency ablation according to claim 1, wherein: the front end of the front sleeve (4) is in threaded connection with the front locking cap head (6), and the rear end of the rear sleeve (5) is in threaded connection with the rear locking cap head (7).
7. The needle electrode for radio frequency ablation according to claim 6, wherein: the front end of the front locking cap head (6) is also provided with an injection flushing cap head (9), an injection flushing port (10) is formed in the injection flushing cap head (9), an injection flushing hole (17) is formed in the position, corresponding to the injection flushing port (10), of the electrode working end (2), and the injection flushing hole (17) is communicated with the gap (18).
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CN201921453081.5U CN211243686U (en) | 2019-09-03 | 2019-09-03 | Needle electrode for radiofrequency ablation |
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CN201921453081.5U CN211243686U (en) | 2019-09-03 | 2019-09-03 | Needle electrode for radiofrequency ablation |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110537976A (en) * | 2019-09-03 | 2019-12-06 | 明丽健康产业(浙江)有限公司 | Needle electrode for radiofrequency ablation |
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2019
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110537976A (en) * | 2019-09-03 | 2019-12-06 | 明丽健康产业(浙江)有限公司 | Needle electrode for radiofrequency ablation |
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