Nerve block needle

Abstract

The utility model discloses a nerve block needle which comprises an outer tube part, an inner tube part, a needle head and a driving mechanism, the inner tube part is located on the inner side of the outer tube part, the needle head is installed at one axial end of the inner tube part, and the driving mechanism is connected with the inner tube part. The driving mechanism is configured to be capable of driving the inner tube part and the needle head to move relative to the outer tube part so as to be switched between a first position and a second position; at the first position, the needle head is contained in the outer tube part, and at least part of the needle head extends out of the outer tube part at the second position. The nerve block needle can reduce injury to a patient and is convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a nerve block needle. Background Art

[0002] Nerve block means injecting anesthetic around a nerve to block its impulse conduction, so that the anesthetic effect is produced in the innervated area to relieve postoperative pain. For example, intercostal and paravertebral nerve block under direct vision of a thoracoscope is one of the common methods for postoperative analgesia after thoracoscopy.

[0003] In the related art, a nerve block needle includes a needle head and an infusion tube. One end of the infusion tube can be connected to the needle head, and the other end of the infusion tube can be connected to an external syringe. When performing nerve block under a thoracoscope, medical staff can operate the needle head entering the patient's chest cavity with an operating tool in the form of an egg-shaped forceps and control the needle head to pierce around the specified nerve, and then inject anesthetic through the syringe to achieve anesthesia of the specified area. However, in the above process, the needle head is always in an exposed state, and it is easy for medical staff to accidentally injure the patient's chest tissues, organs, etc. during the operation of the needle head, and the operation difficulty is relatively high.

[0004] Therefore, how to provide a solution to overcome or alleviate the above defects is still a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a nerve block needle, which can reduce the harm to patients and is convenient to operate.

[0006] To solve the above technical problems, the utility model provides a nerve block needle, which includes an outer tube part, an inner tube part, a needle head and a driving mechanism. The inner tube part is located inside the outer tube part. The needle head is installed at one axial end of the inner tube part. The driving mechanism is connected to the inner tube part and is configured to be able to drive the inner tube part together with the needle head to displace relative to the outer tube part so as to switch between a first position and a second position. In the first position, the needle head is received in the outer tube part, and in the second position, the needle head at least partially extends out of the outer tube part.

[0007] With this solution, when performing a nerve block anesthesia operation, the medical staff can first switch the inner tube and the needle to the first position so that the needle can be hidden in the outer tube. In this way, when the medical staff operates the nerve block needle to move in the patient's body and approach the designated nerve site, the needle is not likely to damage the patient's internal tissues and organs, thereby reducing additional damage to the patient. When the nerve block needle is moved into place, the medical staff can operate the inner tube and the needle through the driving mechanism to switch the two to the second position, so that the needle can at least partially extend out of the outer tube, thereby conveniently operating the needle to pierce the designated nerve site.

[0008] Because the nerve block needle in the embodiment of the utility model can adjust the position of the needle, so that the needle can be switched between a state of being housed in the outer tube portion and a state of being extended from the outer tube portion, this can reduce the possibility of causing harm to the patient during its operation, and can reduce the difficulty of operating the nerve block needle, making the implementation of nerve block anesthesia simple.

[0009] Optionally, a transfer hose is further included, wherein the transfer hose is installed at an end of the inner tube portion away from the needle.

[0010] Optionally, the inner tube portion and the transfer hose are detachably connected, and the driving mechanism is further configured to drive the inner tube portion together with the needle to move to a third position relative to the outer tube portion; in the third position, the connection between the inner tube portion and the transfer hose extends out of the outer tube portion, and in the first position, the connection between the inner tube portion and the transfer hose is housed in the outer tube portion.

[0011] Optionally, the second position includes a plurality of sub-positions, and in each sub-position, the needle extends out of the outer tube by a different length.

[0012] Optionally, the driving mechanism includes a shift block, which is installed on the outer wall surface of the inner tube part. The tube wall of the outer tube part is provided with an operating hole, the shift block is inserted into the operating hole, and the shift block has a portion extending from the operating hole to the outer tube part.

[0013] Optionally, the outer wall surface of the shift block is configured with a protrusion, and the inner wall of the operating hole is configured with a groove portion, the groove portion includes two groove side walls arranged opposite to each other, and a guide wall surface is formed at least partially in the groove side walls, and the protrusion is configured to be able to slide into or out of the groove portion through the guide wall surface.

[0014] Optionally, there are multiple groove portions, and the groove portions are arranged at intervals along the axial direction of the outer tube portion.

[0015] Optionally, a scale mark is provided on the outer wall surface of the outer tube portion, and the scale mark is arranged on one side or both sides in the width direction of the operation hole.

[0016] Optionally, the driving mechanism includes a driving component, and the driving component is in transmission connection with the inner tube portion for driving the inner tube portion to automatically displace along the outer tube portion.

[0017] Optionally, the axial dimension of the outer tube portion is greater than or equal to 30 cm. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of an implementation manner of the nerve block needle provided by the present utility model;

[0019] Figure 2 It is a connection structure diagram of an operation hole and a dial block configured with a plurality of groove portions;

[0020] Figure 3 It is a connection structure diagram of an operation hole and a dial block configured with a scale mark;

[0021] Figure 4 It is a connection structure diagram of the driving component when using a motor and the inner tube portion;

[0022] Figure 5 It is a connection structure diagram of the driving component when using a cylinder, a hydraulic cylinder or an electric cylinder and the inner tube portion.

[0023] Description of the reference numerals is as follows:

[0024] 100 Outer tube portion, 110 Operation hole, 111 Groove portion, 111a Guide wall surface, 120 Scale mark;

[0025] 200 Inner tube portion, 210 Connecting plate;

[0026] 300 Needle head;

[0027] 400 Driving mechanism, 410 Dial block, 411 Protruding portion, 420 Driving component, 421 Motor, 422 Gear portion, 423 Rack portion, 424 Cylinder, 425 Hydraulic cylinder, 426 Electric cylinder, 427 Driving rod;

[0028] 500 Adapter hose. Detailed Embodiments

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0030] In the description of the embodiments of the present utility model, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features.

[0031] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, "connected" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0032] In the embodiments of the present utility model, the orientation terms mentioned, such as "inside", "outside", etc., are only with reference to the direction of the attached drawings. Therefore, the orientation terms used are for better and clearer illustration and understanding of the embodiments of the present utility model, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the embodiments of the present utility model.

[0033] In the description of the embodiments of the present utility model, the term "plurality" means two or more. And when using "plurality" to represent the quantity of different components, it does not represent the mutual relationship in quantity of these components.

[0034] In the description of the embodiments of the present utility model, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device including such element.

[0035] Please refer to Figures 1 - 5 , Figure 1 which is a schematic structural diagram of an implementation manner of the nerve block needle provided by the present utility model, Figure 2 is a connection structure diagram of an operation hole and a dial block configured with a plurality of groove portions, Figure 3 is a connection structure diagram of an operation hole and a dial block configured with scale marks, Figure 4 is a connection structure diagram of the driving member and the inner tube portion when the driving member is a motor, Figure 5 is a connection structure diagram of the driving member and the inner tube portion when the driving member is a cylinder, a hydraulic cylinder or an electric cylinder.

[0036] As Figure 1As shown in the figure, the present utility model provides a nerve block needle, which includes an outer tube portion 100, an inner tube portion 200, a needle tip 300, and a driving mechanism 400.

[0037] The inner tube portion 200 is located inside the outer tube portion 100. The needle tip 300 is installed at one axial end of the inner tube portion 200, and a communication relationship needs to be maintained between the internal channels of the needle tip 300 and the inner tube portion 200 for subsequent delivery of anesthetic. The driving mechanism 400 is connected to the inner tube portion 200 and is configured to be able to drive the inner tube portion 200 together with the needle tip 300 to displace relative to the outer tube portion 100 to switch between a first position and a second position. In the first position, the needle tip 300 is received in the outer tube portion 100, that is, the needle tip 300 can be in a hidden state; in the second position, the needle tip 300 at least partially extends out of the outer tube portion 100, that is, the needle tip 300 can be in an extended state.

[0038] Adopting this solution, during the operation of nerve block anesthesia, medical staff can first switch the inner tube portion 200 and the needle tip 300 to the first position, so that the needle tip 300 can be hidden in the outer tube portion 100. In this way, during the process of the medical staff operating the nerve block needle to move in the patient's body and approach the designated nerve site, the needle tip 300 is not likely to damage the patient's internal tissues and organs, and can reduce the additional harm caused to the patient. And when the nerve block needle moves into place, the medical staff can then operate the inner tube portion 200 and the needle tip 300 through the driving mechanism 400 to switch the two to the second position, so that the needle tip 300 can at least partially extend out of the outer tube portion 100, thereby facilitating the operation of the needle tip 300 to pierce into the designated nerve site. It should be understood that the operation of the needle tip 300 piercing into the designated nerve site can be achieved during the process of the needle tip 300 moving from the first position to the second position, or, alternatively, it can also be achieved by operating the nerve block needle after the needle tip 300 moves to the second position, which is not limited herein.

[0039] As can be seen from the above, because the nerve block needle in the embodiment of the present utility model can adjust the position of the needle tip 300, so that the needle tip 300 can be switched between a hidden state and an extended state, this can reduce the possibility of causing harm to the patient during its operation process, and can reduce the operation difficulty of the nerve block needle, making the implementation of nerve block anesthesia simple.

[0040] In practical applications, the above-mentioned second position can include multiple sub-positions, and, in different sub-positions, the size of the needle tip 300 extending out of the outer tube portion 100 is different, so as to adjust the size of the part of the needle tip 300 extending out of the outer tube portion 100 as needed, thereby better meeting different operation requirements.

[0041] Here, the embodiments of the present utility model do not limit the specific number of the above-mentioned sub-positions. In practical applications, those skilled in the art can determine according to specific needs as long as the requirements of use can be met. For example, the number of the sub-positions can be two. Under one of the sub-positions, the dimension of the part of the needle 300 extending out of the outer tube part 100 can be 3 mm, and under the other sub-position, the dimension of the part of the needle 300 extending out of the outer tube part 100 can be 5 mm.

[0042] In some optional implementation manners, the inner tube part 200 of the nerve block needle provided by the embodiments of the present utility model can be directly connected to an external syringe or injection hose, etc. In this way, the number of components of the nerve block needle provided by the embodiments of the present utility model can be relatively small, and the overall structural form can be relatively simple.

[0043] Specifically, after the needle 300 penetrates into the specified nerve part, an external syringe can directly inject anesthetic into the inner tube part 200 or inject the anesthetic into the inner tube part 200 through an injection hose. The anesthetic can sequentially pass through the inner tube part 200 and the needle 300 and be injected into the specified nerve part, thereby achieving anesthesia around the specified nerve part.

[0044] In some optional implementation manners, the nerve block needle provided by the embodiments of the present utility model may further include a transfer hose 500, and the transfer hose 500 can be installed at one end of the inner tube part 200 facing away from the needle 300.

[0045] In specific applications, an external syringe or injection hose, etc. can be connected to the transfer hose 500 so as to indirectly inject anesthetic into the inner tube part 200 through the transfer hose 500. In this implementation manner, due to the setting of the transfer hose 500, the distance between the external syringe, injection hose, etc. and the patient can be effectively controlled, and the influence of "contaminants" that the syringe, injection hose, etc. may carry on the patient can be better avoided, thereby reducing the risk of infection of the patient during the nerve block anesthesia.

[0046] The transfer hose 500 and the inner tube part 200 can be connected before the product of the nerve block needle provided by the embodiments of the present utility model leaves the factory. In this way, when the nerve block needle is used subsequently, no secondary assembly is required, and the use can become simple. Here, the embodiments of the present utility model do not limit the specific connection manner between the transfer hose 500 and the inner tube part 200. In practical applications, those skilled in the art can determine according to specific needs as long as the reliability requirements of the connection can be ensured.

[0047] The connection part of the adapter hose 500 and the inner tube part 200 can be hidden in the outer tube part 100, so that the possibility of damage to this connection part can be effectively reduced. Of course, the connection part of the adapter hose 500 and the inner tube part 200 can also be located outside the outer tube part 100, and this is also feasible.

[0048] In fact, the above-mentioned adapter hose 500 and inner tube part 200 can also be of a split structure after the product leaves the factory. In this way, the nerve block needle provided by the embodiment of the present invention can be more easily packaged and transported. Then, when the nerve block needle is about to be used, the adapter hose 500 and the inner tube part 200 can be connected again. For this implementation method, in the embodiment of the present invention, the driving mechanism 400 can also be configured to be able to drive the inner tube part 200 together with the needle 300 to displace relative to the outer tube part 100 to a third position. In this third position, the connection part of the inner tube part 200 and the adapter hose 500 can extend out of the outer tube part 100 to conveniently realize the connection of the adapter hose 500 and the inner tube part 200; after the connection is completed, the inner tube part 200 and the needle 300 can be moved relative to the outer tube part 100 to the aforementioned first position through the driving mechanism 400 again. At this time, the connection part of the inner tube part 200 and the adapter hose 500 can be hidden in the outer tube part 100 to reduce the possibility of damage to this connection part. In this implementation method, the inner tube part 200 and the adapter hose 500 can be connected by a detachable connection method, such as snap connection, interference insertion to a certain extent, etc. In this way, in the aforementioned third position, the separation between the inner tube part 200 and the adapter hose 500 can also be conveniently realized. The separation can specifically occur after the implementation of the nerve block anesthesia operation, so as to separately process the adapter hose 500 and other parts in the nerve block needle.

[0049] In some alternative implementation methods, as Figures 1 - 3 shown, the driving mechanism 400 in the embodiment of the present invention can be a manual operation mechanism, including a dial block 410, and the dial block 410 can be installed on the outer wall surface of the inner tube part 200. An operation hole 110 can be provided on the tube wall of the outer tube part 100, and this operation hole 110 can specifically be a strip-shaped hole extending along the axial direction of the outer tube part 100. In the assembled state, the dial block 410 can be inserted into the operation hole 110, and the dial block 410 can have a part extending out of the outer tube part 100 from the operation hole 110. Medical staff can directly operate the part of the dial block 410 extending out of the operation hole 110, thereby realizing the position adjustment of the inner tube part 200 and the needle 300.

[0050] In this implementation method, the nerve block needle provided by the embodiment of the present invention is manually operated. Therefore, its overall structure will be relatively simple and the cost can be relatively low.

[0051] Combined withFigure 2 On the outer wall surface of the shifting block 410, a convex portion 411 may be arranged. Correspondingly, on the inner hole wall of the operation hole 110, a groove portion 111 may be arranged. The convex portion 411 may be inserted into the groove portion 111, so as to realize the positioning of the shifting block 410 in the operation hole 110. Correspondingly, the positioning of the inner tube portion 200 and the needle 300 can also be realized, such that the inner tube portion 200 and the needle 300 can be relatively stably placed in the outer tube portion 100.

[0052] The groove portion 111 may include two relatively arranged groove side walls. For each groove side wall, it may at least partially form an angle greater than 90 degrees with the extending direction of the operation hole 110, so as to form a guiding wall surface 111a. The convex portion 411 may be configured to be able to slide into or out of the groove portion 111 through the guiding wall surface 111a. In this way, the sliding operation of the shifting block 410 and the matching positioning of the shifting block 410 and the groove portion 111 can be conveniently carried out.

[0053] The number of the above-mentioned groove portions 111 may be multiple, and the groove portions 111 may be arranged at intervals along the axial direction of the outer tube portion 100. The number of the groove portions 111 may be consistent with the number of the foregoing first position, second position, and third position, and the arrangement positions of the groove portions 111 may correspond to the foregoing first position, second position, and third position. In this way, when the convex portion 411 of the shifting block 410 slides into the corresponding groove portion 111, it means that the inner tube portion 200 and the needle 300 can be in the corresponding positions. That is to say, medical staff do not need to deliberately observe whether the needle 300 extends out of the outer tube portion 100 and the specific extension dimension when the needle 300 extends out of the outer tube portion 100. Only by controlling the shifting block 410 to enable the convex portion 411 of the shifting block 410 to switch between different groove portions 111, the operation of the nerve block needle provided by the embodiment of the present utility model can be completed, making the use of the nerve block needle simple.

[0054] In practical applications, gear position marks may be arranged on the outer wall surface of the outer tube portion 100 corresponding to each groove portion 111 to mark the corresponding relationship between each groove portion 111 and the foregoing first position, second position, and third position.

[0055] In a specific example, such as Figure 2As shown, along the extension direction of the operation hole 110, the number of the groove parts 111 can be four. From left to right, each of the groove parts 111 can be respectively marked as the R gear, the N gear, the D1 gear and the D2 gear. When the convex part 411 of the shift block 410 slides into the groove part 111 corresponding to the N gear, the inner tube part 200 and the needle 300 can be in the first position, and the needle 300 can be in the hidden state. When the convex part 411 of the shift block 410 slides into the groove part 111 corresponding to the D1 gear, the inner tube part 200 and the needle 300 can be in a sub-position of the second position, and the needle 300 can be in the extended state, but the overall extended dimension is relatively short. When the convex part 411 of the shift block 410 slides into the groove part 111 corresponding to the D2 gear, the inner tube part 200 and the needle 300 can be in another sub-position of the second position, and the needle 300 can be in the extended state, and the overall extended dimension is relatively long. When the convex part 411 of the shift block 410 slides into the groove part 111 corresponding to the R gear, the inner tube part 200 and the needle 300 can be in the third position, and the connection part between the inner tube part 200 and the adapter hose 500 can be exposed outside the outer tube part 100, so that the connection or separation between the inner tube part 200 and the adapter hose 500 can be conveniently carried out.

[0056] It should be understood that when the convex part 411 of the shift block 410 does not slide into the corresponding groove part 111, there will be a certain degree of interference fit between the shift block 410 provided with the convex part 411 and the inner hole wall of the operation hole 110. This interference fit enables the shift block 410 to generate a certain damping when sliding along the operation hole 110, which can improve the operation feel. And because of the existence of this damping, even if the medical staff does not operate the shift block 410 and the convex part 411 does not slide into the groove part 111, the position of the shift block 410 is not easy to change, which can better avoid the free shaking of the inner tube part 200 and the needle 300 in the outer tube part 100, and is more conducive to relatively accurate control of the displacement amount of the shift block 410.

[0057] In practical applications, such as Figure 3As shown, the number of the above-mentioned grooves 111 can also be only one, and this groove 111 can correspond to the inner tube 200 and the needle 300 in the first position, which is also the reference position. In this implementation, a scale mark 120 can also be set on the outer wall of the outer tube 100, and the scale mark 120 can be arranged on one side or both sides of the width direction of the operation hole 110. The zero position of the scale mark 120 can correspond to the groove 111. During the specific operation, the medical staff can drive the shift block 410 to move according to the scale mark 120, thereby realizing the position adjustment of the inner tube 200 and the needle 300. It should be understood that in this implementation, the groove portion 111 may not exist at all, and accordingly, the protrusion 111 may not be provided; in addition, the numerical values on the above-mentioned scale mark 120 are only used to characterize the displacement of the shift block 410 relative to the zero position, and do not indicate the extension amount of the needle 300 out of the outer tube portion 100. The specific correspondence between the displacement amount and the extension amount is required.

[0058] In some optional implementations, such as Figure 4 and Figure 5 As shown, in the embodiment of the utility model, the driving mechanism 400 may further include a driving component 420, which may be in driving connection with the inner tube 200, and is used to drive the inner tube 200 to automatically move along the outer tube 100. In this way, the position adjustment of the inner tube 200 and the needle 300 may be automatically driven by the driving mechanism 400, the operation is simpler, and the degree of automation can be higher.

[0059] In a specific example, Figure 4 As shown, the driving component 420 may include a motor 421, a gear part 422 and a rack part 423. The motor 421 may have a rotating shaft, which may be connected to the gear part 422 to drive the gear part 422 to rotate, and the rack part 423 may be installed on the outer wall surface of the inner tube part 200, and the gear part 422 may mesh with the rack part 423. In this way, after the motor 421 is started, the inner tube part 200 and the needle 300 may be driven by the rack part 423 to adjust the position relative to the outer tube part 100.

[0060] The motor 421 may be located between the inner tube 200 and the outer tube 100. Alternatively, if the space between the inner tube 200 and the outer tube 100 is relatively limited, the motor 421 may be disposed outside the outer tube 100. In this case, a corresponding pore structure may be disposed on the tube wall of the outer tube 100 so that the gear portion 422 can mesh with the rack portion 423.

[0061] In another specific example, Figure 5As shown, the driving component 420 can also be a cylinder 424, a hydraulic cylinder 425, an electric cylinder 426, etc., which can include a driving rod 427 capable of linear displacement. At this time, a connecting plate 210 can be installed on the outer wall surface of the inner tube portion 200, and the driving rod 427 can be connected to the connecting portion 210. The driving rod 427 can drive the inner tube portion 200 and the needle 300 to adjust their positions through the connecting plate 210.

[0062] In practical applications, control buttons can be provided on the outer tube portion 100 and the like. By pressing these control buttons, the start and stop control of the above-mentioned driving component 420 can be achieved. Alternatively, a voice recognition module can also be configured. Medical staff can directly issue control instructions in the form of voice. After the voice recognition module recognizes the corresponding voice control instructions, it can also achieve the start and stop control of the driving component 420. The specific structural form of the voice recognition module and the signal transmission relationship between the voice recognition module and the driving component 420 are not the key points of improvement in the embodiments of the present invention. For details, reference can be made to the existing related technologies, which are not limited herein.

[0063] In some alternative implementation manners, the axial dimension of the outer tube portion 100 can be greater than or equal to 30 cm, for example, it can be 35 cm. During specific operation, a part of the outer tube portion 100 can be located outside the patient's chest cavity. For example, the driving mechanism 400 in the form of the aforementioned dial 410 can be located outside the patient's chest cavity. In this way, it can be conveniently operated, which is a major breakthrough compared with the related art solution that requires operating tools such as an oval forceps to operate inside the patient's chest cavity, and can greatly reduce the operation difficulty of the nerve block needle provided in the embodiments of the present invention.

[0064] Here, the embodiments of the present invention do not limit the specific dimensions of each component in the nerve block needle. In practical applications, those skilled in the art can select according to specific needs as long as the usage requirements can be met. For example, when the axial dimension of the outer tube portion 100 is 35 cm, the outer diameter of the outer tube portion 100 can be 1 cm, the axial dimension of the inner tube portion 200 can be 30 cm, the length of the needle 100 can be 1 cm, and the length of the connecting hose 500 can be 15 cm.

[0065] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A nerve block needle, characterized in that, The device comprises an outer tube portion, an inner tube portion, a needle and a driving mechanism, wherein the inner tube portion is located inside the outer tube portion, the needle is installed at one axial end of the inner tube portion, the driving mechanism is connected to the inner tube portion, and the driving mechanism is configured to drive the inner tube portion together with the needle to move relative to the outer tube portion to switch between a first position and a second position; In the first position, the needle is housed in the outer tube, and in the second position, the needle at least partially protrudes from the outer tube.

2. The nerve block needle according to claim 1, wherein It also includes a transfer hose, which is installed at one end of the inner tube part away from the needle.

3. The nerve block needle according to claim 2, wherein The inner tube part and the transfer hose are detachably connected, and the driving mechanism is further configured to drive the inner tube part together with the needle to move to a third position relative to the outer tube part; In the third position, the connection between the inner tube and the adapter hose extends out of the outer tube, and in the first position, the connection between the inner tube and the adapter hose is accommodated in the outer tube.

4. The nerve block needle according to claim 1, wherein, The second position includes a plurality of sub-positions, and in each of the sub-positions, the length of the needle extending out of the outer tube portion is different.

5. The nerve block needle according to any one of claims 1-4, characterized in that, The driving mechanism includes a shift block, which is installed on the outer wall surface of the inner tube. The tube wall of the outer tube is provided with an operation hole, the shift block is inserted into the operation hole, and the shift block has a portion extending from the operation hole to the outer tube.

6. The nerve block needle according to claim 5, wherein, The outer wall surface of the shift block is provided with a protrusion, the inner wall of the operating hole is provided with a groove, the groove portion includes two groove side walls arranged opposite to each other, a guide wall surface is formed at least partially in the groove side walls, and the protrusion is configured to be able to slide into or out of the groove portion through the guide wall surface.

7. The nerve block needle according to claim 6, wherein There are a plurality of grooves, and the grooves are arranged at intervals along the axial direction of the outer tube.

8. The nerve block needle according to claim 5, wherein The outer wall surface of the outer tube portion is provided with scale marks, and the scale marks are arranged on one side or both sides in the width direction of the operation hole.

9. The nerve block needle according to any one of claims 1-4, characterized in that, The driving mechanism comprises a driving component, which is in driving connection with the inner tube portion and is used to drive the inner tube portion to automatically move along the outer tube portion.

10. The nerve block needle according to any one of claims 1-4, characterized in that, The axial dimension of the outer tube portion is greater than or equal to 30 cm.

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