A neuroprotective device for thyroid surgery

Abstract

This invention relates to the field of medical auxiliary equipment technology and discloses a nerve protection device for thyroid surgery, comprising a nerve detector, a probe, and a nerve detection cannula. The probe includes a handle and a ball-tipped needle, the ball-tipped needle being slidably inserted into the handle. The probe also includes a marking component. The ball-tipped needle has a first flow channel inside, and the marking component can squeeze out a marking solution through the first flow channel of the ball-tipped needle when pressure is applied to the nerve site. The marking component also includes a homogenization mechanism for maintaining the uniformity of the marking solution. By using the marking component, after medical personnel confirm that a tissue is a nerve site, they can easily apply a marking solution to the nerve site by gently pressing the handle, facilitating timely identification during subsequent surgery and avoiding the need for repeated confirmation of the nerve site during the procedure.

Description

Technical Field

[0001] This invention relates to the field of medical assistive device technology, specifically to a neuroprotective device for thyroid surgery. Background Technology

[0002] Thyroid surgery is used to treat thyroid tumors, hyperthyroidism, and other diseases. During the surgery, nerves such as the recurrent laryngeal nerve and superior laryngeal nerve are adjacent to thyroid tissue. Therefore, these nerves are easily damaged during surgery due to traction or accidental cutting, which can lead to complications such as hoarseness and choking when drinking. To reduce the risk of nerve damage, current technology usually uses a nerve detector to protect nerves during surgery. The core principle is to use a nerve detection cannula and probe to identify nerves. After the cannula is inserted into the airway, its surface electrodes contact the tissue surrounding the nerve. When the probe is connected to the detector and touches suspicious tissue, the electrical signal output by the detector is transmitted to the tissue through the probe. If it is a nerve, a characteristic electrophysiological signal is generated and fed back to the detector through the cannula electrodes, forming a complete signal circuit, thereby accurately distinguishing nerves from surrounding tissues. Once the medical staff confirms the nerve location, they will take care to protect the nerve during subsequent surgery to avoid damage to the nerve.

[0003] However, the existing technology has the following problems: While existing nerve detection devices can accurately determine whether a target area contains a nerve, the surgical area is complex and may contain multiple nerve sites. Even after confirming nerve locations with a probe, medical staff often struggle to accurately locate each nerve site within the subsequent surgical time. Therefore, during surgery, if medical staff cannot determine whether an area contains a nerve, they must test again with the probe. This repeated confirmation of nerve locations consumes valuable surgical time and reduces surgical efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a nerve protection device for thyroid surgery in order to solve the above-mentioned problems. It aims to overcome the shortcomings of medical staff having to repeatedly confirm nerve locations during surgery, which takes up part of the surgical time and reduces surgical efficiency, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a nerve protection device for thyroid surgery, comprising a nerve detector, a probe, and a nerve detection cannula. The probe includes a handle and a ball-tipped needle, the ball-tipped needle being slidably inserted into the handle. The probe also includes a marking component, the ball-tipped needle having a first flow channel inside, the marking component being able to squeeze out marking fluid through the first flow channel of the ball-tipped needle when pressure is applied to the nerve site, thereby marking the nerve site. The marking component also includes a homogenization mechanism for maintaining the uniformity of the marking fluid.

[0006] Preferably, the nerve detector is equipped with a first wire and a second wire, and a conductive block is installed inside the handle. The end of the first wire away from the nerve detector is connected to the conductive block, and the ball-head needle is provided with a conductive flange. The conductive block is slidably connected to the conductive flange of the ball-head needle.

[0007] Preferably, the marking assembly includes a first liquid cylinder, a second liquid cylinder, a piston, and a stopper rod. The first liquid cylinder is installed inside the handle, the second liquid cylinder is installed inside the first liquid cylinder, the piston is slidably connected inside the second liquid cylinder, and the stopper rod is slidably connected through one end of the first liquid cylinder and the second liquid cylinder near the ball-head needle. One end of the stopper rod is connected to the piston, and the other end of the stopper rod is connected to the ball-head needle. A spring is provided between the ball-head needle and the inner wall of the handle.

[0008] Preferably, the piston and the second liquid cylinder are each provided with a liquid hole, and a one-way valve is installed in the liquid hole of the piston and the second liquid cylinder respectively. A second flow channel is provided in the piston rod, and the second flow channel is connected to the first flow channel. The liquid hole of the piston is connected to the second flow channel. When the piston moves towards the second liquid cylinder, it can squeeze the marking liquid in the second liquid cylinder into the second flow channel. When the piston moves away from the second liquid cylinder, it can draw the marking liquid in the first liquid cylinder into the second liquid cylinder.

[0009] Preferably, the homogenizing mechanism includes a stirring rod, a groove rod, and multiple blades. The groove rod is fixedly installed on the inner wall of the first liquid cylinder. One end of the stirring rod is slidably connected to the groove rod, and the other end of the stirring rod is connected to the piston. The stirring rod is slidably connected to the second liquid cylinder through it, and the multiple blades are all connected to the outer wall of the stirring rod.

[0010] Preferably, the groove rod has an annular inclined groove, and the inner wall of the stirring rod is equipped with a sliding tongue. The sliding tongue is slidably connected to the annular inclined groove, and the stirring rod rotates by utilizing the sliding cooperation between the sliding tongue and the annular inclined groove when it moves along the axial direction of the groove rod.

[0011] Preferably, the nerve detection cannula includes a tube body, an electrode sleeve is fitted onto the outer wall of the tube body, and the end of the second lead wire away from the nerve detector is connected to the electrode sleeve.

[0012] Preferably, the tube has an input end and an output end, the second wire passes through and is fixed to the outer wall of the input end of the tube, the outer wall of the output end of the tube is connected to an annular airbag, and an air tube is installed on the inner wall of the tube, the air tube being connected to the annular airbag.

[0013] Preferably, the outer wall of the electrode sleeve has four mounting slots, and each of the four mounting slots of the electrode sleeve has a strip-shaped airbag installed in it. All four strip-shaped airbags are connected to the annular airbag.

[0014] The beneficial effects are: 1. This nerve protection device for thyroid surgery, through the setting of the marking component, allows medical staff to apply a marking solution to the nerve site by gently pressing the handle after identifying a certain tissue as a nerve location. This facilitates timely identification by medical staff during subsequent surgery, avoiding the need for repeated confirmation of nerve locations during the operation, thereby saving surgical time.

[0015] 2. The nerve protection device for thyroid surgery, through the setting of the homogenization mechanism, enables the piston to move synchronously with the stirring rod. Multiple blades on the stirring rod turbulent the labeling liquid in the first liquid cylinder by moving. Furthermore, the stirring rod can also rotate while moving, so that the blades optimize the stirring and mixing effect on the labeling liquid through compound motion, thereby maintaining the uniformity of the labeling liquid. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the probe structure of the present invention; Figure 3 This is a schematic diagram of the handle structure of the present invention; Figure 4 This is a schematic diagram of the ball-head needle structure of the present invention; Figure 5 This is a schematic diagram of the stirring rod structure of the present invention; Figure 6 This is a schematic diagram of the grooved rod structure of the present invention; Figure 7 This is a schematic diagram of the nerve detection cannula structure of the present invention; Figure 8 This is a schematic diagram of the tube structure of the present invention; Figure 9 This is a schematic diagram of the annular airbag structure of the present invention; Figure 10 This is a schematic diagram of the strip-shaped airbag structure of the present invention.

[0018] The annotations in the attached figures are explained as follows: 1. Nerve detector; 11. First lead; 12. Second lead; 2. Probe; 21. Handle; 22. Ball-head needle; 23. First liquid cylinder; 24. Second liquid cylinder; 25. Piston; 26. Plug rod; 27. Conductive block; 28. Stirring rod; 29. ​​Groove rod; 210. Blade; 3. Neurological detection cannula; 31. Cannula body; 32. Electrode sleeve; 33. Circular balloon; 34. Strip balloon; 35. Trachea. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] One embodiment of the present invention is as follows: Please see Figure 1 - Figure 4 A nerve protection device for thyroid surgery includes a nerve detector 1, a probe 2, and a nerve detection cannula 3. The probe 2 includes a handle 21 and a ball-tipped needle 22, which is slidably inserted into the handle 21. A first lead 11 and a second lead 12 are installed on the nerve detector 1. A conductive block 27 is installed inside the handle 21. The end of the first lead 11 away from the nerve detector 1 is connected to the conductive block 27. The ball-tipped needle 22 has a conductive flange, and the conductive block 27 is slidably connected to the conductive flange of the ball-tipped needle 22. The nerve detector 1 transmits the detection electrical signal to the conductive block 27 through the first lead 11, and the conductive block 27 transmits the electrical signal through the conductive flange. The signal is transmitted to the ball-tipped needle 22. Medical staff control the movement of the ball-tipped needle 22 through the handle 21. When the ball-tipped needle 22 contacts the suspected nerve tissue, the electrical signal is conducted through the nerve tissue and then forms a signal circuit with the nerve tissue through the nerve detection cannula 3. Finally, the signal is fed back to the nerve detector 1. The nerve detector 1 determines whether the contact site is a nerve by analyzing the signal. When the ball-tipped needle 22 contacts the nerve, it can retract a certain distance towards the handle 21 to avoid rigid contact causing compression damage to the nerve. The sliding connection structure between the conductive block 27 and the conductive flange can ensure that the electrical contact is not interrupted during the displacement of the ball-tipped needle 22, ensuring the continuity and stability of the detection signal.

[0021] In addition, probe 2 also includes a marking assembly. The ball-tipped needle 22 has a first flow channel inside. When pressure is applied to the nerve site by the ball-tipped needle 22, the marking assembly can squeeze out the marking liquid through the first flow channel to mark the nerve site. The marking assembly includes a first liquid cylinder 23, a second liquid cylinder 24, a piston 25, and a stopper rod 26. The first liquid cylinder 23 is installed inside the handle 21, and the second liquid cylinder 24 is installed inside the first liquid cylinder 23. The piston 25 is slidably connected inside the second liquid cylinder 24. The stopper rod 26 is slidably connected through the first liquid cylinder 23 and the second liquid cylinder 24 near the ball-tipped needle 22. One end of the stopper rod 26 is connected to the piston 25, and the other end is connected to the ball-tipped needle 22. A spring is provided between the ball-tipped needle 22 and the inner wall of the handle 21. The first liquid cylinder 23 and the second liquid cylinder 24 contain marking liquid, which is non-neurotoxic and can... It is biodegradable by the human body and can be cleaned with saline solution. The labeling solution is 0.5% methylene blue solution. The spring between the ball needle 22 and the inner wall of the handle 21 is in a pre-tightened state, supporting the ball needle 22 to maintain its extended position. When medical staff touch the suspected nerve site with the ball needle 22, and the nerve detector 1 indicates that the site is a nerve site, the medical staff applies pressure to the nerve site with the handle 21, causing the ball needle 22 to contract and slide inward into the handle 21 due to the reaction force of the nerve site. The spring is compressed synchronously. The pressure applied to the nerve site by the contraction of the ball needle 22 will not cause damage to the nerve site. When the ball needle 22 contracts, it drives the stopper rod 26 and the piston 25 to slide towards the second liquid cylinder 24, causing the piston 25 to squeeze the second liquid cylinder 24, so that the labeling solution in the second liquid cylinder 24 is squeezed into the first flow channel of the ball needle 22.

[0022] In addition, piston 25 and second liquid cylinder 24 are respectively provided with liquid holes, and one-way valves are installed in the liquid holes of piston 25 and second liquid cylinder 24 respectively. A second flow channel is provided in the stopper rod 26, which is connected to the first flow channel. The liquid hole of piston 25 is connected to the second flow channel. When piston 25 moves towards second liquid cylinder 24, it can squeeze the marking liquid in second liquid cylinder 24 into the second flow channel. When piston 25 moves away from second liquid cylinder 24, it can draw the marking liquid in first liquid cylinder 23 into second liquid cylinder 24. When piston 25 moves towards second liquid cylinder 24, the one-way valve of piston 25 opens, the one-way valve of second liquid cylinder 24 closes, and the marking liquid in second liquid cylinder 24 is pressurized into first flow channel and then flows out through second flow channel. The outlet of second flow channel is located at the contact point between ball needle 22 and nerve area. The labeling solution overflows from the second flow channel outlet on the ball needle 22 to the nerve site, thus achieving labeling. After confirming that a tissue is a nerve site, medical staff can easily apply the labeling solution to the nerve site by gently pressing the handle. This facilitates timely identification by medical staff during subsequent surgery, avoiding the need for repeated confirmation of the nerve site during surgery, thereby saving surgical time. After labeling is completed, the medical staff lifts the handle 21, and the ball needle 22 returns to its original position using spring force. This causes the ball needle 22 to drive the piston 25 away from the second liquid cylinder 24 via the stop rod 26. During this process, the one-way valve of the piston 25 is closed, and the one-way valve of the second liquid cylinder 24 is opened. The piston 25 uses negative pressure to draw the labeling solution in the first liquid cylinder 23 into the second liquid cylinder 24 for replenishment.

[0023] Based on the above embodiments, another embodiment of the present invention is as follows: Please see Figure 2 - Figure 5 The handle 21 and the first liquid cylinder 23 are equipped with liquid level observation ports and scales to facilitate medical staff to observe the liquid level in the first liquid cylinder 23. The first liquid cylinder 23 is equipped with a liquid filling tube, which is equipped with a one-way valve. The liquid filling tube also has a one-way air intake function to maintain the normal pressure in the first liquid cylinder 23.

[0024] Based on the above embodiments, another embodiment of the present invention is as follows: Please see Figure 4 - Figure 6The marking assembly also includes a homogenizing mechanism for maintaining the uniformity of the marking liquid. The homogenizing mechanism includes a stirring rod 28, a groove rod 29, and multiple blades 210. The groove rod 29 is fixedly installed on the inner wall of the first liquid cylinder 23. One end of the stirring rod 28 is slidably connected to the groove rod 29, and the other end of the stirring rod 28 is connected to the piston 25. The stirring rod 28 is slidably connected to the second liquid cylinder 24. The multiple blades 210 are all connected to the outer wall of the stirring rod 28. When the piston 25 moves, it drives the stirring rod 28 to move synchronously. The multiple blades 210 on the stirring rod 28 disturb the marking liquid in the first liquid cylinder 23 by moving, promoting a more uniform texture distribution of the marking liquid.

[0025] It is worth noting that an annular inclined groove is provided on the groove rod 29, and a sliding tongue is installed on the inner wall of the stirring rod 28. The sliding tongue is slidably connected to the annular inclined groove. When the stirring rod 28 moves along the axial direction of the groove rod 29, it rotates by the sliding cooperation between the sliding tongue and the annular inclined groove. When the stirring rod 28 slides on the outer wall of the groove rod 29, the sliding tongue slides along the annular inclined groove and is subjected to the counter-thrust of the annular inclined groove to move circumferentially. This causes the sliding tongue to drive the stirring rod 28 to rotate on the outer wall of the groove rod 29. This achieves the technical effect that the stirring rod 28 can rotate while moving, so that the blades 210 on the stirring rod 28 can optimize the stirring and mixing of the labeling liquid through compound motion, thereby maintaining the uniformity of the labeling liquid.

[0026] Based on the above embodiments, another embodiment of the present invention is as follows: Please see Figure 1 , Figure 7 - Figure 10The nerve detection cannula 3 includes a tube body 31, with an electrode sleeve 32 fitted onto the outer wall of the tube body 31. The end of the second lead wire 12 furthest from the nerve detector 1 is connected to the electrode sleeve 32. The tube body 31 has an input end and an output end. The second lead wire 12 passes through and is fixed to the outer wall of the input end of the tube body 31. A ring-shaped airbag 33 is connected to the outer wall of the output end of the tube body 31. A trachea 35 is installed on the inner wall of the tube body 31 and is connected to the ring-shaped airbag 33. The input end of the tube body 31 is used for operator positioning, and the output end is inserted into the patient's airway to fit the vocal cord position. The tube body 31 has a hollow structure to meet airway ventilation requirements. The electrode sleeve 32 is fitted onto the outer wall of the tube body 31, precisely corresponding to the vocal cord periphery area within the airway, forming the nerve detector 1. The first lead wire 11, conductive block 27, conductive flange, ball-tipped needle 22, nerve tissue, electrode sleeve 32, and second lead wire 12 return to the complete detection signal circuit of the nerve detector 1. When the ball-tipped needle 22 contacts the nerve, the electrode sleeve 32 can receive the electrical signal conducted by the nerve and feed it back to the detector, realizing the coordinated monitoring of nerve function. The annular airbag 33 is connected to the trachea 35 installed on the inner wall of the tube 31. During operation, gas is delivered to the annular airbag 33 through the trachea 35, so that the airbag expands and fits tightly against the inner wall of the airway, thereby stabilizing the tube 31 in the airway and preventing the tube 31 from shifting due to traction or swallowing by the patient during the operation, thus ensuring the contact stability between the electrode sleeve 32 and the nerve surrounding tissue.

[0027] It is worth mentioning that the outer wall of the electrode sleeve 32 has four mounting slots, and each of the four mounting slots of the electrode sleeve 32 has a strip-shaped airbag 34 installed in it. All four strip-shaped airbags 34 are connected to the annular airbag 33. When the annular airbag 33 is inhaled, some gas enters the four strip-shaped airbags 34 through the annular airbag 33. After being inhaled, the strip-shaped airbags 34 can protrude slightly from the outer surface of the electrode sleeve 32, so that the four strip-shaped airbags 34 come into contact with the surrounding tissue, thereby generating a certain frictional force. This further improves the stability of the entire nerve detection cannula 3 in the patient's body, reduces the displacement of the tube 31 during the operation, and thus ensures the stability of the operation.

[0028] Using the above structure, the working principle of this case is as follows: the output end of the cannula 31 of the nerve detection cannula 3 is placed into the patient's airway to fit the vocal cords. Inflation is then performed through the trachea 35 on the inner wall of the cannula 31 to the annular balloon 33. The annular balloon 33 expands and adheres to the inner wall of the airway, thus fixing the cannula 31. Simultaneously, gas flows into the four strip-shaped balloons 34 in the mounting groove of the electrode sleeve 32. The protruding strip-shaped balloons 34 further enhance the stability of the fixation. Then, the nerve detector 1 is adjusted. During the surgical detection stage, the nerve detector 1 transmits electrical signals to the conductive block 27 through the first wire 11. The conductive block 27 transmits signals through the ball-tipped needle 22. The electrical flange transmits the signal to the ball-tipped needle 22. Medical personnel hold the handle 21 to control the movement of the ball-tipped needle 22. When the ball-tipped needle 22 contacts suspected nerve tissue, a complete signal circuit is formed, including the nerve detector 1, the first lead 11, the conductive block 27, the conductive flange, the ball-tipped needle 22, the nerve tissue, the electrode sleeve 32, the second lead 12, and the nerve detector 1. After the electrical signal is fed back to the nerve detector 1, signal analysis confirms whether it is a nerve. Once a nerve is confirmed, the medical personnel apply pressure to the area, causing the ball-tipped needle 22 to overcome the spring force between itself and the inner wall of the handle 21 and retract inwards, simultaneously driving the stopcock. 26 pushes the piston 25 in the second liquid cylinder 24 to move. At this time, the one-way valve in the liquid hole of the piston 25 opens, and the one-way valve in the liquid hole of the second liquid cylinder 24 closes. The marking liquid in the second liquid cylinder 24 enters the second flow channel of the plug rod 26 through the liquid hole of the piston 25, and then overflows to the nerve site through the first flow channel of the ball needle 22 to complete the marking. At the same time, the movement of the piston 25 drives the stirring rod 28 to move axially along the groove rod 29 fixed to the inner wall of the first liquid cylinder 23. The sliding tongue on the inner wall of the stirring rod 28 slides along the annular inclined groove of the groove rod 29, causing the stirring rod 28 to rotate synchronously, driving the multiple blades 210 on its outer wall to stir the liquid in the first liquid cylinder 23. The labeling solution is kept uniform. After labeling is completed, the medical staff lifts the handle 21, and the spring drives the ball needle 22 to return to its original position. The ball needle 22 pulls the piston 25 away from the second liquid cylinder 24 through the stop rod 26. At this time, the one-way valve in the liquid hole of the piston 25 is closed, and the one-way valve in the liquid hole of the second liquid cylinder 24 is opened. The labeling solution in the first liquid cylinder 23 is drawn into the second liquid cylinder 24 to replenish it under negative pressure. If the labeling solution is insufficient, it can be replenished into the first liquid cylinder 23 through the one-way valve of the liquid addition tube. At the same time, the liquid addition tube realizes one-way air intake to maintain the normal pressure in the first liquid cylinder 23 and ensure that subsequent labeling operations can be carried out continuously.

[0029] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A nerve protection device for thyroid surgery, comprising a nerve detector (1), a probe (2), and a nerve detection cannula (3), characterized in that: The probe (2) includes a handle (21) and a ball-head needle (22), the ball-head needle (22) being slidably inserted into the handle (21); The probe (2) also includes a labeling component. The ball-tipped needle (22) has a first flow channel inside. The labeling component can squeeze the labeling liquid through the first flow channel of the ball-tipped needle (22) to label the nerve site when the ball-tipped needle (22) applies pressure to the nerve site. The labeling assembly also includes a homogenizing mechanism for maintaining the uniformity of the labeling solution.

2. The neuroprotective device for thyroid surgery according to claim 1, characterized in that: The nerve detector (1) is equipped with a first wire (11) and a second wire (12). A conductive block (27) is installed inside the handle (21). The end of the first wire (11) away from the nerve detector (1) is connected to the conductive block (27). The ball-head needle (22) is provided with a conductive flange. The conductive block (27) is slidably connected to the conductive flange of the ball-head needle (22).

3. A neuroprotective device for thyroid surgery according to claim 2, characterized in that: The marking assembly includes a first liquid cylinder (23), a second liquid cylinder (24), a piston (25), and a stopper rod (26). The first liquid cylinder (23) is installed inside the handle (21), and the second liquid cylinder (24) is installed inside the first liquid cylinder (23). The piston (25) is slidably connected inside the second liquid cylinder (24). The stopper rod (26) is slidably connected to one end of the first liquid cylinder (23) and the second liquid cylinder (24) near the ball-head needle (22). One end of the stopper rod (26) is connected to the piston (25), and the other end of the stopper rod (26) is connected to the ball-head needle (22). A spring is provided between the ball-head needle (22) and the inner wall of the handle (21).

4. A neuroprotective device for thyroid surgery according to claim 3, characterized in that: The piston (25) and the second liquid cylinder (24) are respectively provided with liquid holes. One-way valves are installed in the liquid holes of the piston (25) and the second liquid cylinder (24). The piston rod (26) is provided with a second flow channel. The second flow channel is connected to the first flow channel. The liquid hole of the piston (25) is connected to the second flow channel. When the piston (25) moves towards the second liquid cylinder (24), it can squeeze the marking liquid in the second liquid cylinder (24) into the second flow channel. When the piston (25) moves away from the second liquid cylinder (24), it can draw the marking liquid in the first liquid cylinder (23) into the second liquid cylinder (24).

5. A neuroprotective device for thyroid surgery according to claim 4, characterized in that: The homogenization mechanism includes a stirring rod (28), a groove rod (29), and multiple blades (210). The groove rod (29) is fixedly installed on the inner wall of the first liquid cylinder (23). One end of the stirring rod (28) is slidably connected to the groove rod (29), and the other end of the stirring rod (28) is connected to the piston (25). The stirring rod (28) is slidably connected to the second liquid cylinder (24). The multiple blades (210) are all connected to the outer wall of the stirring rod (28).

6. A neuroprotective device for thyroid surgery according to claim 5, characterized in that: The groove rod (29) has an annular inclined groove, and the inner wall of the stirring rod (28) is equipped with a sliding tongue. The sliding tongue is slidably connected to the annular inclined groove. When the stirring rod (28) moves along the axial direction of the groove rod (29), it rotates by the sliding cooperation between the sliding tongue and the annular inclined groove.

7. A neuroprotective device for thyroid surgery according to claim 2, characterized in that: The nerve detection cannula (3) includes a tube body (31), an electrode sleeve (32) is fitted on the outer wall of the tube body (31), and the end of the second lead wire (12) away from the nerve detector (1) is connected to the electrode sleeve (32).

8. A neuroprotective device for thyroid surgery according to claim 7, characterized in that: The tube (31) is provided with an input end and an output end. The second wire (12) passes through and is fixed on the outer wall of the input end of the tube (31). The outer wall of the output end of the tube (31) is connected to an annular airbag (33). An air tube (35) is installed on the inner wall of the tube (31). The air tube (35) is connected to the annular airbag (33).

9. A neuroprotective device for thyroid surgery according to claim 8, characterized in that: The outer wall of the electrode sleeve (32) is provided with four mounting slots, and strip-shaped airbags (34) are respectively installed in the four mounting slots of the electrode sleeve (32). All four strip-shaped airbags (34) are connected to the annular airbag (33).

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