Radiofrequency pen-type stereotactic puncture device for trigeminal neuralgia through the foramen rotundum
By designing a pen-type stereotactic puncture device, the problem of insufficient fixation and depth display of puncture points in round hole puncture of trigeminal neuralgia is solved, which improves the accuracy and safety of the surgery and shortens the surgical time.
Patent Information
- Application Number
- CN202010824676.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-08-17
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2040-08-17
AI Technical Summary
During the CT-guided round hole puncture of trigeminal neuralgia, it is difficult for the prior art to accurately fix the puncture point and display the puncture depth, resulting in uncontrollable surgical time and risks of intracranial hemorrhage, infection and nerve damage.
A pen-type three-dimensional positioning puncture device is designed to fuse the radio frequency puncture needle with the three-dimensional positioning device, display the puncture angle and depth through the level electronic display and the gyro sensor, and fix the puncture point through the thruster and the downward part to ensure the puncture depth. and the accuracy of the angle.
It improves the accuracy and safety of round hole puncture, shortens the surgical time, reduces the risk of intracranial hemorrhage and nerve damage, and makes operation more convenient.
Smart Images
Figure CN111888004B_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to medical auxiliary equipment, and relates to a positioning and puncture auxiliary instrument used for foramen puncture under CT guidance during radiofrequency ablation for the clinical treatment of trigeminal neuralgia (second maxillary neuralgia), and in particular to a radiofrequency pen-type stereotactic puncture device for foramen puncture of trigeminal neuralgia, which can fix the puncture point, ensure that the puncture point does not move during the puncture process, and accurately display the angle and depth of the foramen puncture. Background Art
[0002] Trigeminal neuralgia refers to spontaneous or induced, repetitive paroxysmal electric shock-like or lightning-like severe pain in the area innervated by the trigeminal nerve, which is known as "the world's number one pain". The pain is mainly located in the forehead, face, zygomatic region, mandibular region, etc., and can be induced by factors such as speaking, eating, washing face, brushing teeth, etc., which seriously affects the patient's quality of life. Trigeminal neuralgia can be divided into primary and secondary, of which primary is the most common and secondary has a lower incidence rate, which can be identified through relevant examinations such as cranial imaging. The trigeminal nerve is mainly divided into three branches, namely the ophthalmic branch (first branch), maxillary branch (second branch) and mandibular branch (third branch). Primary trigeminal neuralgia can affect one or more branches, of which the incidence rate of the first branch alone is about 4%, the incidence rate of the second branch alone is about 17%, the incidence rate of the third branch alone is about 15%, and the incidence rate of the second branch combined with the third branch is about 32%. Anti-epileptic drugs such as carbamazepine are the first choice for the treatment of primary trigeminal neuralgia. If the treatment is ineffective or the patient cannot tolerate the side effects of the drug, surgical treatment should be used, including open-circuit microvascular decompression, balloon compression, percutaneous foramen ovale approach to trigeminal ganglion radiofrequency, chemical drug injection destruction, etc. Among them, percutaneous foramen ovale approach to trigeminal ganglion radiofrequency is one of the most commonly used minimally invasive surgical methods for the treatment of trigeminal neuralgia. The surgeon chooses 2.5-3.0 cm outside the corner of the mouth on the affected side as the puncture point, and the plane where the puncture point and the pupil of the affected side are located, and the intersection of the plane where the puncture point and the front of the external auditory foramen of the affected side are located is the puncture direction. This method has been used for more than 100 years, but the position of the puncture needle tip needs to be repeatedly adjusted during the puncture process, which makes the operation time uncontrollable. In addition, repeated punctures of the intracranial Meckel's capsule may be required during the operation, which has a great risk of intracranial hemorrhage, infection and nerve damage.
[0003] In recent years, some scholars have suggested using subzygomatic approach and foramen rotundum puncture radiofrequency to treat pain in the second branch of the trigeminal nerve, transforming the radiofrequency target of pain in the second branch of the trigeminal nerve from the semilunar ganglion to the foramen rotundum, and transferring it from the intracranial to the extracranial, thereby reducing the risks of intracranial hemorrhage, intracranial infection, and nerve damage, and improving safety.
[0004] Despite this, the treatment of pain in the second branch of the trigeminal nerve by radiofrequency puncture of the foramen rotundum through the subzygomatic arch approach is still being improved. In the past, a puncture stereotactic device consisting of a semicircular protractor, a level and a base was often used to assist in the positioning and puncture of the foramen rotundum under CT guidance. The radiofrequency puncture needle used in the past was thin, which was inconvenient for the operator to hold directly, and could not display the puncture depth, and lacked a fixed puncture point device. In addition, because the positioning device and the puncture needle are separated, the operator needs to hold the semicircular stereotactic positioning device with the left hand and the puncture needle with the right hand to cooperate in the operation. During the scanning process, repeated CT scans may be required to determine the puncture depth. The above factors prolong the puncture operation and operation time. Summary of the invention
[0005] The purpose of the invention is to provide a pen-type stereotactic puncture device for trigeminal neuralgia through the foramen rotundum puncture and radiofrequency thermocoagulation, which is a pen-type stereotactic puncture device for trigeminal nerve through the foramen rotundum puncture and radiofrequency thermocoagulation. It integrates stereotactic positioning and radiofrequency puncture needles into one, can more intuitively display the puncture angle and puncture depth, and has a specific design so that the fixed puncture point and puncture depth do not change during use.
[0006] The present invention provides a pen-held stereotactic puncture device for trigeminal neuralgia through round hole puncture radiofrequency thermocoagulation. The whole device is mainly composed of five parts, namely, a level electronic display 1, a pen body 2, a radiofrequency puncture needle 3, a propeller 4 and a screw-down part 5. The level electronic display 1 is welded through a pen body connection block 13 (for multiple uses) and connected to the tail of the pen body 2. The level electronic display 1 is a rectangular parallelepiped with a length of 3 cm × a width of 2 cm × a height of 2 cm. Two mutually perpendicular gyro sensors are installed inside (measuring the angles in the X-axis and Y-axis directions respectively), which are used to detect the inclination angle of the stereotactic puncture device, and its reading can be directly displayed through the electronic display of the level. The pen body 2 is 20 cm long and has a cylindrical cavity with a diameter of 0.7 cm inside, which can accommodate a radiofrequency puncture needle 3 with a length of 18 cm and an inner diameter of 0.35 cm. A scale is provided on the outer surface of the pen body 2, with each scale interval being 1.0 cm and the minimum scale being 0.1 cm, so as to more accurately display the puncture depth. There is a threaded connection 6 5 cm away from the tip of the pen body 2, which divides the pen body 2 into an upper part and a lower part. The radiofrequency puncture needle 3 is improved from the radiofrequency puncture needle commonly used in clinical practice. The radiofrequency puncture needle 3 is divided into two parts: an external needle body 9 and an internal needle core 10. The length of the needle body 9 is improved from 10 cm to 17.5 cm, and the inner diameter is still 0.35 cm. The tail end of the needle body 9 is a square hand-held connecting block 12 with a side length of 0.8 cm and a thickness of 0.3 cm. A hollow circle with a diameter of 0.35 mm is opened in the center of the hand-held connecting block 12. The diameter of the hollow circle matches the diameter of the needle body 9. There is a circle of rotating threads (0.2 cm thick) in the hollow circle. The needle body 9 and the hand-held connecting block 12 are fixed by welding; a black thermal insulation film is coated on the surface of the needle body 9 for thermal insulation, and a 0.5 cm length of the tip of the needle body 9 is not covered with the thermal insulation film (exposed end). The tail of the radiofrequency puncture needle 3 is a conical handpiece 11, the head end of the handpiece 11 is fixed to the tail end of the needle core 10 by welding, and the surface of the connection between the handpiece 11 and the needle core 10 has a circle of rotating threads (matching the rotating threads in the hollow circle of the handpiece connection block 12), and the needle core 10 is inserted into the needle body 9 through the central hollow circle of the handpiece connection block 12 and is connected and fixed to the needle body 9 through this circle of rotating threads. The needle core 10 is 18 cm long and has an inner diameter of 0.3 cm, and retains the original bevel tip of the needle core. A propeller 4 is provided at a position 18 cm away from the tip of the pen body 2. The propeller 4 is located in a circle with a diameter of 0.5 cm in the cavity of the pen body 2, and a conical protrusion with a diameter of 0.2 cm and a height of 0.2 cm is provided below the circle, which matches a conical depression with a diameter of 0.2 cm and a height of 0.2 cm at the top of the tail end of the hand holding 11; the side end of the propeller 4 is exposed outside the pen body 2 as a finger contact part 7, and the pen body 2 on one side of the finger contact part 7 is provided with a vertical concave notch as a downward movement track (width 0.2 cm) for the finger contact part 7, the upper end of the track is connected to the pen body connecting block 13, and the lower end is connected to the threaded connection 6. After the propeller 4 is pushed to the threaded connection 6, it cannot move downward any further.The pusher 4 is provided with a pusher bayonet 8, which can clamp the conical hand 11 and fix the radiofrequency puncture needle 3 during puncture; after the pusher bayonet 8 fixes the hand 11, the radiofrequency puncture needle 3 is pushed toward the tip by moving the finger contact part 7 downward. A screw-down part 5 is provided 1.5 cm away from the tip of the pen body 2, which is trapezoidal, with a long side length of 0.6 cm, a height of 0.5 cm, and a short side length of 0.3 cm. The screw-down part 5 is connected to the pen body 2 through a thread. When the thread is tightened, the position of the puncture needle remains unchanged, and when it is unscrewed, the puncture depth of the puncture needle can be adjusted.
[0007] During use, the pusher bayonet 8 fixes the RF puncture needle 3 by clamping the hand 11 at the tail of the RF puncture needle 3, and then starts to position the puncture needle. After the positioning is completed, the finger pushes the finger contact part 7 of the pusher, and moves the puncture needle toward the tip along the downward track of the finger contact part 7. When the required puncture depth is reached, tighten the screw-down part 5 (the screw-down part 5 is in a non-tightened state before the target puncture depth is reached, otherwise the tip of the RF puncture needle 3 will be fixed and the puncture depth cannot be adjusted), fix the puncture needle, and prevent the puncture needle tip from moving after the puncture is completed, affecting the positioning accuracy. Then unscrew the threaded connection 6 on the pen body 2, as well as the rotating thread connecting the fixed needle body 9 and the needle core 10, thereby removing the level electronic display 1, the upper part of the pen body 2 and the built-in needle core 10 fixed by the pusher bayonet 8, leaving the lower part of the pen body 2, the screw-down part 5 and the needle body 9. Insert the radiofrequency needle into the needle body 9 through the hollow circle center in the middle of the hand-held connecting block 12, and reach the puncture target point along the needle body. Then turn on the radiofrequency instrument to start the trigeminal nerve radiofrequency thermocoagulation.
[0008] The radiofrequency puncture needle currently used in clinical practice is relatively thin (with an inner diameter of about 0.35 mm), which is inconvenient for the operator to hold directly in hand, and cannot display the puncture depth, and lacks a device for fixing the puncture point. In addition, because the positioning device and the puncture needle are separated, the operator needs to hold the semicircular stereo positioning device with the left hand and the puncture needle with the right hand for coordinated operation. During the scanning process, repeated CT scans may be required to determine the puncture depth, etc., which not only prolongs the puncture operation and operation time, but also easily causes the positioning position to shift. The pen-type stereo positioning puncture device of the present invention better solves the shortcomings of the positioning puncture devices used in the past, and solves more practical operation problems encountered in the circular hole positioning and puncture process, increases the circular hole positioning and puncture accuracy, and shortens the puncture and operation time. The present invention has a reasonable structural design, is simple to manufacture and has low cost, is easy to operate, and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the structure of the present invention.
[0010] Figure 2This is a schematic diagram of the internal structure of the electronic display of the level, in which the left picture: the X-axis gyro sensor measures the X-axis angle, and the Y-axis gyro sensor measures the Y-axis angle. The right picture: the electronic level display when the X-axis gyro sensor measures an angle of 35 degrees and the Y-axis gyro sensor measures an angle of 35 degrees.
[0011] Figure 3 It is a schematic diagram of the side structure of the pen body.
[0012] Figure 4 It is a schematic diagram of the structure on the back of the pen body.
[0013] Figure 5 It is a schematic diagram of the structure of the threaded connection of the pen body.
[0014] Figure 6 This is a top view of the thruster.
[0015] Figure 7 This is a side view of the thruster bayonet.
[0016] Figure 8 It is a schematic diagram of the fixing structure of the pusher bayonet and the tail of the radiofrequency puncture needle.
[0017] Fig. 9 It is a schematic diagram of the structure of the unscrewed part.
[0018] Fig.10 It is a schematic diagram of the structure of a radiofrequency puncture needle.
[0019] Fig.11 This is a schematic diagram of circular hole puncture in the CT scanning plane. DETAILED DESCRIPTION
[0020] The present invention is further described in conjunction with the accompanying drawings and embodiments.
[0021] Example 1
[0022] See also Figure 1-10 The present invention provides a pen-type stereotactic puncture device for trigeminal neuralgia through the round hole puncture and radiofrequency thermocoagulation. The whole device is mainly composed of five parts, namely, a level electronic display 1, a pen body 2, a radiofrequency puncture needle 3, a propeller 4 and a screw-down part 5. The level electronic display 1 is connected to the pen body connection block 13 at the tail of the pen body 2 by welding (for multiple uses). The level electronic display 1 is a rectangular parallelepiped with a length of 3 cm × a width of 2 cm × a height of 2 cm. Two gyro sensors are installed inside, which are perpendicular to each other and measure the angles in the X-axis and Y-axis directions respectively ( Figure 2), used to detect the inclination angle of the stereotactic puncture device, and its reading can be directly displayed on the electronic display of the level. The pen body 2 is 20 cm long, and there is a cylindrical cavity with a diameter of 0.7 cm inside, which can hold a radiofrequency puncture needle 3 with a length of 18 cm and an inner diameter of 0.35 cm; the upper and lower parts of the pen body 2 are provided with scales (not shown in the figure), each scale interval is 1.0 cm, and the minimum scale is 0.1 cm, so as to more accurately display the puncture depth; there is a threaded connection 6 (5 cm away from the tip of the pen body 2 Figure 5 ), the pen body 2 is divided into an upper part and a lower part. The radiofrequency puncture needle 3 is improved from the radiofrequency puncture needle commonly used in clinical practice ( Fig.10 ), the radiofrequency puncture needle 3 is divided into two parts: the external needle body 9 and the internal needle core 10. The length of the needle body 9 is improved from 10cm to 17.5cm, and the inner diameter is still 0.35cm; the tail end of the needle body 9 is a square hand-held connection block 12 with a side length of 0.8cm and a thickness of 0.3cm. The center of the hand-held connection block 12 has a hollow circle with a diameter of 0.35mm. The diameter of the hollow circle matches the diameter of the needle body 9. There is a circle of rotating threads (thickness 0.2cm) in the hollow circle. The needle body 9 and the hand-held connection block 12 are fixed by welding; the surface of the needle body 9 is coated with a black heat-insulating film for heat insulation, and the tip of the needle body 9 has a length of 0.5cm that is not covered with the heat-insulating film (exposed end). The tail of the radiofrequency puncture needle 3 is a conical handle 11. The head end of the handle 11 is fixed to the tail end of the needle core 10 by welding. There is a circle of rotating threads on the surface of the connection between the handle 11 and the needle core 10 (matching the rotating threads in the hollow circle of the handle connection block 12). The needle core 10 is inserted into the needle body 9 through the central hollow circle of the handle connection block 12 and is connected and fixed to the needle body 9 through this circle of rotating threads. The needle core 10 is 18 cm long and has an inner diameter of 0.3 cm. The original bevel tip of the needle core is retained. A propeller 4 is provided at a position 18 cm away from the tip of the pen body 2. The propeller 4 is located in the cavity of the pen body 2 and is a circle with a diameter of 0.5 cm ( Figure 6 ), a conical protrusion with a diameter of 0.2 cm and a height of 0.2 cm is provided below the circle ( Figure 7 ), matches with a conical depression with a diameter of 0.2 cm and a height of 0.2 cm at the top of the tail end of the hand 11; the side end of the propeller 4 is exposed outside the pen body 2, serving as the finger contact part 7, and the pen body 2 on one side of the finger contact part 7 has a vertical concave notch as a downward track for the finger contact part 7 (width 0.2 cm), the upper end of the track is connected to the pen connection block 13, and the lower end is connected to the threaded connection 6 ( Figure 4 ), the pusher 4 cannot move down after being pushed to the threaded connection 6. The pusher 4 is provided with a pusher bayonet 8, which can clamp the conical handle 11 and fix the radiofrequency puncture needle 3 during puncture ( Figure 8); After the pusher bayonet 8 fixes the hand 11, the RF puncture needle 3 is pushed toward the tip by moving the finger contact portion 7 downward. A screw-down portion 5 is provided 1.5 cm away from the tip of the pen body 2 ( Fig. 9 ), is trapezoidal, with a long side length of 0.6 cm, a height of 0.5 cm, and a short side length of 0.3 cm. The unscrewed part 5 is connected to the pen body 2 through a thread. When the thread is tightened, the position of the puncture needle remains unchanged. When it is unscrewed, the puncture depth of the puncture needle can be adjusted.
[0023] When in use, the pusher 4 bayonet 8 fixes the RF puncture needle 3 by clamping the hand 11 at the tail of the RF puncture needle 3, and then starts to position the puncture needle. After the positioning is completed, the finger pushes the pusher finger contact part 7, and moves the puncture needle toward the tip along the downward track of the finger contact part 7. When the required puncture depth is reached, tighten the screw-down part 5 (the screw-down part 5 is in a loose state before the target puncture depth is reached, otherwise the tip of the RF puncture needle 3 will be fixed and the puncture depth cannot be adjusted), fix the puncture needle, and avoid the movement of the puncture needle tip after the puncture is completed, affecting the positioning accuracy. Then unscrew the threaded connection 6 on the pen body 2, as well as the rotating thread connecting the fixed needle body 9 and the needle core 10, thereby removing the level electronic display 1, the upper part of the pen body 2 and the built-in needle core 10 fixed by the pusher bayonet 8, leaving the lower part of the pen body 2, the screw-down part 5 and the needle body 9. Insert the radiofrequency needle into the needle body 9 through the hollow circle center in the middle of the hand-held connecting block 12, and reach the puncture target point along the needle body. Then turn on the radiofrequency instrument to start the trigeminal nerve radiofrequency thermocoagulation.
[0024] This pen-type stereotactic puncture device better solves the practical operational problems encountered during the round hole positioning and puncture process, increases the round hole puncture and positioning accuracy, and shortens the puncture and operation time.
[0025] Example 2 Instructions for use of the invention device
[0026] 1. Positioning: The patient is in a supine position, with a pillow under the shoulder, the head tilted back as much as possible, and the lower jaw is fixed with a wide tape to reduce the movement of the head during CT scanning positioning and puncture. The CT scanning layer spacing is 0.2cm. First, a CT positioning scan is performed, and the layer that includes the inner and outer openings of the foramen and the foramen tube, and does not include the zygomatic bone and other obstacles to the puncture needle, is selected as the best puncture layer. If the inner and outer openings of the foramen, the foramen tube and the zygomatic bone are on the same CT scanning layer, a semi-coronal CT scan is added to better select the puncture layer and angle. The junction of the middle and outer 1 / 3 of the foramen tube is used as the target, and the PACS software (INFINITT Healthcare Co., Seoul Korea) configured by the imaging system is used to draw the puncture point and puncture path to determine the puncture depth and angle.
[0027] 2. Determine the needle insertion point: Keep the height of the CT scanning bed unchanged, adjust the position of the CT scanning bed horizontally in the head and tail direction of the patient to the location of the selected optimal puncture plane, turn on the built-in infrared of the CT, project it on the patient's face, and use a marker to mark the dotted line at the infrared projection position on the patient's face, and determine this plane as the puncture plane. The junction of the inner and outer 1 / 3 of the circular hole on the determined CT puncture level is used as the target point, and the point extending to the skin away from tissues such as the maxillary sinus is the location of the puncture point.
[0028] 3. Puncture: If there is no bone obstruction on the selected puncture path, the straight needle method is selected. Use 1% lidocaine for local infiltration anesthesia at the facial puncture point. When using the pen-type stereotactic puncture device of the present invention, place the radiofrequency puncture needle 3 in the cavity of the pen body 2, fix the tail handle 11 of the radiofrequency puncture needle 3 between the thruster bayonet 8, and insert the conical protrusion under the thruster 4 rod into the conical depression at the tail end of the radiofrequency puncture needle 3 handle, and then insert the radiofrequency puncture needle 3 from the puncture point. According to the reading displayed on the electronic horizontal display 1, adjust the angle of the positioning puncture device to be consistent with the puncture angle determined by the CT scan, which is the actual puncture angle. The scale outside the pen body 2 can display the depth of needle insertion. The bayonet 8 of the pusher 4 clamps the hand 11 at the tail of the RF puncture needle 3 to position the puncture needle. After positioning is completed, the left hand pushes the pusher finger contact part 7 to move the puncture needle toward the tip. When the puncture depth is determined by the CT scan, stop pushing and tighten the screw-down part 5 (the screw-down part 5 is in a loose state before the target puncture depth is reached, otherwise the tip of the RF puncture needle 3 is fixed and the puncture depth cannot be adjusted). Fix the puncture needle to prevent the needle insertion depth from changing and to prevent the tip of the puncture needle from moving after the puncture is completed, affecting the positioning accuracy. Scan the CT scan again to confirm whether the position and direction of the RF puncture needle are correct. If there is a deviation, make fine adjustments based on the CT scan image, and finally make the tip of the RF puncture needle reach the puncture target point, that is, the junction of the inner and outer 1 / 3 of the circular hole ( Fig.11 ).
[0029] IV. Test: Fix the tip of the pen-holding stereotactic puncture device with your right hand, then unscrew the threaded connection 6 on the pen body 2, and the rotating thread connecting the fixed needle body 9 and the needle core 10, so as to remove the electronic display 1 of the level meter, the upper part of the pen body 2, and the built-in needle core 10 fixed by the pusher bayonet 8, leaving the lower part of the pen body 2, the unscrewed part 5 and the needle body 9. Insert the radiofrequency needle into the needle body 9 through the hollow circle center in the middle of the hand-held connection block 12, and reach the puncture target point along the needle body 9 to perform electrophysiological tests of electrical impedance, sensation and movement. The sensory test uses high frequency 50Hz, 0.1V, 0.5mA and below to induce pain symptoms in the original pain area as the test success standard; the motor test uses low frequency 2Hz, 1.0V, 0.5mA and below to induce muscle twitching in the affected upper lip and maxillary area as the test success standard.
[0030] 5. Radiofrequency: After the test is successful, 1.5-2.0mg / kg of propofol is injected intravenously for anesthesia, and the radiofrequency instrument is set to 90℃ and 120s to perform radiofrequency thermocoagulation of the second branch of the trigeminal nerve. Repeat 2-3 cycles and closely monitor changes in the patient's vital signs. After the radiofrequency is completed, wait for the patient to wake up, test the sensory changes in the area innervated by the maxillary branch of the trigeminal nerve on the affected side, and determine whether the original trigeminal neuralgia has disappeared. If pain still exists, perform another CT scan to determine the position of the radiofrequency needle, and perform radiofrequency thermocoagulation again. The process is the same as above until the pain in the patient's original painful area disappears. Then observe on the treatment bed for 30 minutes. If there is no discomfort and the vital signs are stable, return to the ward.
Claims
1. A pen-type stereotactic puncture device for trigeminal neuralgia through the foramen rotundum puncture and radiofrequency thermocoagulation, characterized in that: The invention mainly comprises a level electronic display (1), a pen body (2), a radiofrequency puncture needle (3), a propeller (4) and a screw-down part (5), wherein the level electronic display (1) is connected to the tail of the pen body (2) by welding, and two gyro sensors perpendicular to each other are installed inside the level electronic display (1). The pen body (2) is 20 cm long and has a cylindrical cavity with a diameter of 0.7 cm inside. A scale is provided on the outer surface of the pen body (2), and a threaded connection (6) is provided 5 cm away from the tip of the pen body (2). The pen body (2) is screwed into the pen body (2) and screwed into the pen body (2). The radiofrequency puncture needle (3) is divided into an outer needle body (9) and an inner needle core (10). The tail end of the needle body (9) is a square hand-held connecting block (12) with a side length of 0.8 cm and a thickness of 0.3 cm. The center of the hand-held connecting block (12) is provided with a hollow circle with a diameter of 0.35 mm. The diameter of the hollow circle matches the diameter of the needle body (9). There is a circle of rotating threads in the hollow circle. The needle body (9) and the hand-held connecting block (12) are fixed by welding. A black heat-insulating film is plated on the surface of the needle body (9). The tip of the needle body (9) has a length of 0.5 cm that is not covered with the heat-insulating film. Thermal film, the tail of the radiofrequency puncture needle (3) is a conical hand (11), the head end of the hand (11) is fixed to the tail end of the needle core (10) by welding, and the surface of the connection between the hand (11) and the needle core (10) has a circle of rotating threads, which matches the rotating threads in the hollow circle of the hand connecting block (12), the needle core (10) is 18 cm long and 0.3 cm in inner diameter, and the original bevel tip of the needle core is retained; a propeller (4) is provided at a position 18 cm away from the tip of the pen body (2), and the propeller (4) is located in the cavity of the pen body (2) and is a circle with a diameter of 0.5 cm, and in this circle A conical protrusion with a diameter of 0.2 cm and a height of 0.2 cm is provided at the bottom. The side end of the propeller (4) is exposed outside the pen body (2) and serves as a finger contact portion (7). The pen body (2) on one side of the finger contact portion (7) has a vertical concave notch with a width of 0.2 cm, which serves as a downward track for the finger contact portion (7). The propeller (4) is provided with a propeller bayonet (8) for clamping the conical handle (11). A screw-down portion (5) is provided at a distance of 1.5 cm from the tip of the pen body (2) and is trapezoidal in shape. The screw-down portion (5) is connected to the pen body (2) through a thread.
2. A pen-type stereotactic puncture device for trigeminal neuralgia through the foramen rotundum puncture and radiofrequency thermocoagulation according to claim 1, characterized in that: The electronic display of the level (1) is a cuboid with a length of 3 cm, a width of 2 cm, and a height of 2 cm. Two gyro sensors installed inside the level are perpendicular to each other and measure the angles in the X-axis and Y-axis directions respectively. The gyro sensors are used to detect the tilt angle of the stereotactic puncture device. The reading is directly displayed on the electronic display of the level.
3. A pen-type stereotactic puncture device for trigeminal neuralgia through the foramen rotundum puncture and radiofrequency thermocoagulation according to claim 1, characterized in that: The outer surface of the pen body (2) is provided with scales, the interval between each scale is 1.0 cm, and the minimum scale is 0.1 cm.
4. A pen-type stereotactic puncture device for trigeminal neuralgia through the foramen rotundum puncture and radiofrequency thermocoagulation according to claim 1, characterized in that: The radiofrequency puncture needle (3) is 18 cm long and has an inner diameter of 0.35 cm.
5. A pen-type stereotactic puncture device for trigeminal neuralgia through foramen rotundum puncture and radiofrequency thermocoagulation according to claim 1, characterized in that: The needle body (9) has a length of 17.5 cm and an inner diameter of 0.35 cm.
6. A pen-type stereotactic puncture device for trigeminal neuralgia via foramen rotundum puncture and radiofrequency thermocoagulation according to claim 1, characterized in that: The pen body (2) is provided with a vertical concave notch, the upper end of which is connected to the pen connection block (13) and the lower end of which is connected to the threaded connection point (6).
7. A pen-type stereotactic puncture device for trigeminal neuralgia through the foramen rotundum puncture and radiofrequency thermocoagulation according to claim 1, characterized in that: The screw-down part (5) is trapezoidal in shape, with a long side length of 0.6 cm, a height of 0.5 cm, and a short side length of 0.3 cm.
8. A pen-type stereotactic puncture device for trigeminal neuralgia through foramen rotundum puncture and radiofrequency thermocoagulation according to claim 1, characterized in that: The needle core (10) is fixed to the needle body (9) via a rotating thread in the central hollow circle of the hand-holding connection block (12).
9. A pen-type stereotactic puncture device for trigeminal neuralgia through foramen rotundum puncture and radiofrequency thermocoagulation according to claim 1, characterized in that: The conical protrusion of the propeller (4) matches a conical depression with a diameter of 0.2 cm and a height of 0.2 cm at the top of the tail end of the handle (11).