Guide pin device

Abstract

The invention discloses a guide needle device which comprises a base, a first guide needle cylinder and two sub guide needle cylinders, the two sub guide needle cylinders are connected with the first guide needle cylinder, the positions of the two sub guide needle cylinders can be adjusted relative to the first guide needle cylinder, and the two sub guide needle cylinders are parallel to the first guide needle cylinder; the base is fixed with a target tissue through a fixing nail; the first needle guide cylinder is connected with the base through a rotating joint, and the rotating joint allows the angle of the first needle guide cylinder to be adjusted in a conical area relative to the base; the first needle guide cylinder and the two sub needle guide cylinders are provided with telescopic movable guide parts, the movable guide parts are used for adjusting the guide length of the needle guide cylinder, and the two sub needle guide cylinders can rotate relative to the axis where the first needle guide cylinder is located and / or change the distance relative to the axis. Wherein the guide needle device is used for guiding the three kirschner wires respectively; the first needle guide cylinder can be flexibly adjusted in a conical area; the sub-needle guide cylinders can be adjusted in direction along with the first needle guide cylinder, and the distance between the first needle guide cylinder and the two sub-needle guide cylinders can be adjusted, so that the device can conveniently adapt to femoral necks of different sizes.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a needle guide device. Background Art

[0002] Femoral neck fracture surgery can be treated through open reduction and internal fixation of femoral neck fracture, which can promote the healing of bone parts as soon as possible. In the femoral neck fracture reduction and internal fixation surgery, in order to reduce the femoral head and femoral neck, three Kirschner wires are usually inserted first. The three Kirschner wires are used to guide the installation of subsequent bone fixation screws.

[0003] The implantation of Kirschner wires requires a certain guide device or guiding device to ensure the correctness of the implantation direction. The implantation of Kirschner wires with incorrect directions or angles may affect the smooth reduction of the femoral neck. In severe cases, it may delay the best treatment opportunity and even cause iatrogenic damage to the patient. Therefore, the accuracy of Kirschner wire implantation is crucial in femoral neck fracture surgery. Since three Kirschner wires are generally required to be implanted, the usual Kirschner wire guidance and guiding device usually has a fixed guide hole, and the distance between the three Kirschner wires cannot be adjusted or is inconvenient to adjust, and cannot be flexibly adapted to patients with different femoral head sizes. Therefore, it is urgent to propose a guide needle device that can adjust the distance between the three Kirschner wires. Summary of the invention

[0004] The present invention provides a needle guide device, which solves the problem of inflexible direction adjustment of Kirschner wires for femoral neck fractures in the prior art.

[0005] The present disclosure provides a needle guide device, comprising a base, a first needle guide cylinder, two sub-needle guide cylinders connected to the first needle guide cylinder and adjustable in position relative to the first needle guide cylinder, the two sub-needle guide cylinders being parallel to the first needle guide cylinder; the base being fixed to a target tissue via a fixing pin; the first needle guide cylinder being connected to the base via a rotating joint, the rotating joint allowing the first needle guide cylinder to adjust an angle relative to the base within a conical region; the first needle guide cylinder and the two sub-needle guide cylinders having a retractable movable guiding portion, the movable guiding portion being used to adjust the guiding length of the needle guide cylinder, the two sub-needle guide cylinders being rotatable relative to an axis where the first needle guide cylinder is located and / or changing a distance relative to the axis.

[0006] According to the aforementioned embodiment, in a first optional implementation manner, the rotation joint is a ball joint, the rotation joint includes a spherical rotor and a spherical rotation space, the first needle guide tube passes through the rotor, and the rotation space is arranged on the base.

[0007] According to the aforementioned embodiment, in a second optional implementation, the base includes two buckling parts that are separately arranged in an upper and lower body, the two buckling parts are buckled together to form a rotation space, and the two buckling parts are provided with locking bolts. When the locking bolts are tightened, the two buckling parts are pressed together to fix the rotor.

[0008] According to the aforementioned embodiment, in a third optional implementation, the two sub-needle guide cylinders are connected to the first needle guide cylinder via a connecting piece, one end of the connecting piece is rotatably connected to the first needle guide cylinder, and the connecting piece is provided with a travel groove, and the sub-needle guide cylinder can approach or move away from the first needle guide cylinder in the travel groove.

[0009] According to the aforementioned embodiment, in a fourth optional implementation, the stroke groove is a through groove that penetrates the thickness of the connecting piece, and the sub-needle guide tube is inserted into the stroke groove; a limiting portion and a nut are provided on the sub-needle guide tube, and the limiting portion and the nut are used to fix the sub-needle guide tube relative to the stroke groove.

[0010] According to the aforementioned embodiment, in a fifth optional implementation, the connecting pieces corresponding to the two sub-needle guide tubes are rotatably connected to the first needle guide tube through rings respectively, and the two rings are distributed in sequence along the axial direction of the first needle guide tube. The first needle guide tube is provided with a nut for locking the connecting piece, and when the nut is locked, the connecting piece is prevented from rotating relative to the first needle guide tube.

[0011] According to the aforementioned embodiment, in a sixth optional implementation manner, the edge of the travel groove is provided with a distance scale, and the outer periphery of the collar is provided with an angle scale.

[0012] According to the aforementioned embodiment, in a seventh optional implementation, the movable guide portion is an inner sleeve disposed in the first needle guide tube or the two sub-needle guide tubes, a spring is disposed between the inner sleeve and the first needle guide tube or the two sub-needle guide tubes, and the inner sleeve can move axially relative to the first needle guide tube or the two sub-needle guide tubes.

[0013] According to the aforementioned embodiment, in an eighth optional implementation manner, at least one positioning guide sleeve is provided on the base, and the positioning guide sleeve is used to penetrate a fixing pin to fix the base to the target tissue.

[0014] According to the aforementioned embodiment, in a ninth optional implementation, there are two positioning guide sleeves, one of which continues to extend close to one end of the target tissue and has a positioning tooth at the end, which is used to contact the target tissue to prevent the guide needle device from rotating.

[0015] Beneficial Effects

[0016] The needle guide device proposed in the present disclosure forms guides for three Kirschner wires respectively through the arrangement of a first needle guide cylinder and two sub-needle guide cylinders; the first needle guide cylinder can be flexibly adjusted in a conical area through the arrangement of a rotating joint; the two sub-needle guide cylinders are connected to the first needle guide cylinder through a connecting piece, the sub-needle guide cylinder is parallel to the first needle guide cylinder, the sub-needle guide cylinder can follow the first needle guide cylinder for direction adjustment, and the distance between the first needle guide cylinder and the two sub-needle guide cylinders can be adjusted, so as to facilitate adaptation to femoral necks of different sizes; the movable guide part on the needle guide cylinder is arranged to facilitate adjustment of the guide length of the needle guide cylinder, so that the guide length is extended as much as possible, so as to form a better guiding effect on the Kirschner wire with a certain flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure where the guide pin structure of the embodiment of the present disclosure is fixed to the femoral neck;

[0018] Figure 2 It is a schematic diagram of the guide needle structure with a guide needle according to an embodiment of the present disclosure;

[0019] Figure 3 The guide needle structure of the embodiment of the present disclosure is shown in FIG. Figure 1 ;

[0020] Figure 4 The guide needle structure of the embodiment of the present disclosure is shown in FIG. Figure 2 ;

[0021] Figure 5 It is a schematic diagram of the structure of the first needle guide cylinder and the base according to an embodiment of the present disclosure;

[0022] Figure 6 It is a cross-sectional view of the structure of the first needle guide tube according to an embodiment of the present disclosure;

[0023] Figure 7 It is a cross-sectional view of a sub-needle guide tube according to an embodiment of the present disclosure;

[0024] Figure 8 The guide needle structure of the embodiment of the present disclosure is shown in FIG. Figure 3 ;

[0025] Figure markings: 1-base, 101-first fastening piece, 102-second fastening piece, 103-locking bolt, 104-positioning guide sleeve, 105-positioning tooth, 2-first needle guide cylinder, 3-sub-needle guide cylinder, 301-limiting part, 302-nut, 4-target tissue, 5-rotational joint, 501-rotor, 502-rotational space, 6-movable guide part, 601-spring, 7-Kirschner wire, 8-movable end cover, 9-flange, 10-connecting piece, 1001-travel groove, 1002-ring, 1003-distance scale, 1004-angle scale. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the present disclosure will be described in detail below. In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present disclosure, rather than to limit the present disclosure. For those skilled in the art, the present disclosure can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present disclosure by illustrating examples of the present disclosure.

[0027] The applicant has found in clinical practice that the implantation of Kirschner wires requires a certain guide device or guiding device to ensure the correctness of the implantation direction. The implantation of Kirschner wires with incorrect directions or angles may affect the smooth reduction of the femoral neck. In severe cases, it may delay the best treatment opportunity and even cause iatrogenic damage to the patient. Therefore, the accuracy of Kirschner wire implantation is crucial in femoral neck fracture surgery. Since three Kirschner wires are generally required to be implanted, the usual Kirschner wire guidance and guiding device usually has a fixed guide hole, and the distance between the three Kirschner wires cannot be adjusted or is inconvenient to adjust, and cannot be flexibly adapted to patients with different femoral head sizes.

[0028] To this end, the present disclosure provides a needle guide device, such as Figure 1-Figure 4 As shown, the needle guide device includes a base 1, a first needle guide cylinder 2, two sub-needle guide cylinders 3 connected to the first needle guide cylinder 2 and adjustable in position relative to the first needle guide cylinder 2, and the two sub-needle guide cylinders 3 are parallel to the first needle guide cylinder 2; the base 1 is fixed to the target tissue 4 by a fixing nail; the first needle guide cylinder 2 is connected to the base 1 by a rotating joint 5, and the rotating joint 5 allows the first needle guide cylinder 2 to adjust the angle within the cone area relative to the base 1; the first needle guide cylinder 2 and the two sub-needle guide cylinders 3 have a retractable movable guide part 6, and the movable guide part 6 is used to adjust the guiding length of the needle guide cylinder, and the two sub-needle guide cylinders 3 can rotate relative to the axis where the first needle guide cylinder 2 is located and / or change the distance relative to the axis.

[0029] It can be understood that by setting up the first guide needle tube and the two sub-guide needle tubes, three Kirschner wires 7 are guided respectively, so that the Kirschner wires 7 can be accurately implanted during femoral neck fracture surgery, thereby ensuring that the medical fixation screws implanted along the Kirschner wires 7 have a good reduction and fixation effect on the femoral neck.

[0030] By setting the rotating joint 5, the first needle guide tube 2 can be flexibly adjusted within the conical area, that is, after the base 1 of the needle guide device is fixed to the bone, the guiding directions of the first needle guide tube 2 and the two sub-needle guide tubes 3 can be adjusted without separating the base 1 from the bone and then adjusting the angle and re-fixing it, thereby reducing the damage to the patient caused by re-fixation.

[0031] Continue to refer Figure 3 and Figure 4 , two sub-needle guide cylinders 3 are connected to the first needle guide cylinder 2, the sub-needle guide cylinder 3 is parallel to the first needle guide cylinder 2, and the sub-needle guide cylinder 3 can follow the first needle guide cylinder 2 to adjust the direction. The two sub-needle guide cylinders 3 can rotate relative to the axis of the first needle guide cylinder 2 and / or change the distance relative to the axis, that is, the distance between the first needle guide cylinder 2 and the two sub-needle guide cylinders 3 can be adjusted, which is convenient for adapting to femoral necks of different sizes. The setting of the movable guide part 6 on the needle guide cylinder facilitates the adjustment of the guide length of the needle guide cylinder, so that the guide length is extended as much as possible, forming a better guiding effect on the Kirschner wire 7 with a certain flexibility, and avoiding the problem of inaccurate guiding direction caused by the bending of the Kirschner wire due to the short guiding degree.

[0032] like Figure 6 and Figure 7 As shown, the movable guide part 6 is an inner sleeve arranged in the first needle guide tube 2 or the two sub-needle guide tubes 3, and a spring 601 is arranged between the inner sleeve and the first needle guide tube 2 or the two sub-needle guide tubes 3, and the inner sleeve can move axially relative to the first needle guide tube 2 or the two sub-needle guide tubes 3. Specifically, the first needle guide tube 2 and the two sub-needle guide tubes 3 are provided with a movable end cover 8 at one end, and a flange 9 or a retaining ring protruding from the inner diameter thereof is provided at the other end. The inner sleeve is sleeved in the first needle guide tube 2 or the sub-needle guide tube 3, and a spring 601 is arranged between the inner sleeve and the movable end cover 8. The end cover is connected to the needle guide tube by a thread or a pin, which is not specifically limited here. In this way, when the needle guide device is actually used, the inner sleeve can be adaptively extended or contracted under the thrust of the spring 601, so as to provide the Kirschner wire 7 with a longer guiding length as much as possible, thereby ensuring the accuracy of the direction of implantation of the Kirschner wire 7.

[0033] like Figure 5 As shown, the rotation joint 5 connecting the first needle guide cylinder 2 and the base 1 is a ball joint. The rotation joint 5 includes a spherical rotor 501 and a spherical rotation space 502. The first needle guide cylinder passes through the rotor, that is, the rotor is arranged outside the first needle guide cylinder 2, and the rotation space 502 is arranged on the base 1. The base 1 includes two buckling parts arranged in upper and lower parts, and the two buckling parts are buckled to form the rotation space 502. The two buckling parts are provided with locking bolts 103. When the locking bolts 103 are locked, the two buckling parts are pressed together to fix the rotor 501.

[0034] The buckle parts are designed as a large and a small part. The buckle part located at the bottom is called the first buckle part 101, and the buckle part located at the top is called the second buckle part 102. The first buckle part 101 and the second buckle part 102 are both provided with a hemispherical space, and the two are buckled to form a spherical rotation space 502 for accommodating the rotor 501. When the direction of the first needle guide tube 2 needs to be fixed, the two buckle parts are locked by the locking bolt 103, and the locking bolt 103 presses the two buckle parts, and the inner wall of the rotation space 502 contacts the rotor, and the direction of the first needle guide tube 2 is locked by friction.

[0035] At least one positioning guide sleeve 104 is provided on the first fastening member 101, and the positioning guide sleeve 104 is used to pass a fixing nail to fix the base to the target tissue 4. The positioning guide sleeve 104 is a sleeve with a certain length, and a thread is provided in the positioning guide sleeve. The fixing nail passes through the positioning guide sleeve 104 and is threadedly connected with the positioning guide sleeve 104 to fix the base to the patient's bone, that is, near the femoral affected part.

[0036] In an optional embodiment, as shown in the figure, the number of positioning guide sleeves 104 is two, one of which continues to extend near one end of the target tissue 4 and is provided with a positioning tooth 105 at the end, and the positioning tooth 105 is used to contact the target tissue to prevent the needle guide device from rotating. It is easy to understand that the deepening and extension of the positioning guide sleeve 104 can be fixed with only one common fixing nail to stably fix the base on the bone. That is, the fixing nail fixes the base 1 by squeezing the extended positioning guide sleeve 104. Of course, in another optional embodiment, the positioning guide sleeve 104 can be neither extended nor provided with a positioning tooth, and the base 1 can be suspended and fixed to the patient's bone by two specially provided fixing nails. For example, it is fixed by a fixing nail with a tapered thread. On the one hand, the fixing nail is fixed to the positioning guide sleeve 104 by a tapered thread self-locking, and on the other hand, it can be connected to the bone thread through the head, so that the base 1 can be suspended while the base 1 is fixed to the bone.

[0037] like Figure 1-4 As shown, the two sub-needle guide cylinders 3 are connected to the first needle guide cylinder 2 through a connecting member 10, and one end of the connecting member 10 is rotatably connected to the first needle guide cylinder 2. The connecting member 10 is also provided with a travel groove 1001, and the sub-needle guide cylinder 3 can be close to or away from the first needle guide cylinder 2 in the travel groove 1001. That is, the distance between the sub-needle guide cylinder 3 and the first needle guide cylinder 2 can be adjusted by adjusting the position of the sub-needle guide cylinder 3 in the travel groove 1001.

[0038] The travel groove 1001 is a through groove that penetrates the thickness direction of the connecting member 10, and the sub-needle guide cylinder 3 is inserted into the travel groove 1001; the sub-needle guide cylinder 3 is provided with a limiting portion 301 and a nut 302, and the limiting portion 301 and the nut 302 are used to fix the sub-needle guide cylinder 3 relative to the travel groove 1001. In this way, when the position of the sub-needle guide cylinder 3 in the travel groove 1001 is adjusted, the nut 302 is tightened, and the nut 302 and the limiting portion 301 fix the connecting member, and the distance between the sub-needle guide cylinder 3 and the first needle guide cylinder 2 is fixed. In addition, the movable end cover 8 located on the nut 302 can prevent the nut 302 from falling off.

[0039] The connecting pieces 10 corresponding to the two sub-needle guide cylinders 3 are respectively rotatably connected to the first needle guide cylinder 2 through the collars 1002. The two collars 1002 are sequentially distributed along the axial direction of the first needle guide cylinder 2. The first needle guide cylinder 2 is provided with a nut 302 for locking the connecting piece 10. When the nut 302 is locked, the connecting piece 10 is prevented from rotating relative to the first needle guide cylinder 2. It can be understood that the nut 302 is threadedly connected to the first needle guide cylinder 2, and the nut 302 rotates to axially move and squeeze the two collars 1002. The static friction force generated by the compression ensures that the collars 1002 are fixed and do not rotate, thereby realizing the distance adjustment between the two sub-needle guide cylinders 3.

[0040] In some optional embodiments, such as Figure 3 , Figure 4 as well as Figure 8 As shown, the edge of the travel groove 1001 is provided with a distance scale 1003, and the outer periphery of the collar 1002 is provided with an angle scale 1004. It is easy to understand that, through the setting of the distance scale 1003, the user can easily determine the distance adjusted between the two sub-needle guide cylinders in the travel groove 1001 relative to the first needle guide cylinder 2. The outer periphery of the collar 1002 of the connecting member 10 corresponding to the two sub-needle guide cylinders 3 is provided with an angle scale 1004, and the angle scale 1004 can help the user determine the angle between the two sub-needle guide cylinders 3 with the first needle guide cylinder 2 as the origin. In addition, the distance between the two sub-needle guide cylinders 3 relative to the first needle guide cylinder 2 and the angle between the two sub-needle guide cylinders 3 obtained by the distance scale 1003 can accurately know the distance between the three Kirschner wires 7, thereby ensuring the accuracy of the implantation of the Kirschner wire 7 and the surgical effect of the fixation of the femoral neck fracture.

[0041] In the description of the embodiments of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0042] It should be noted that, in the embodiments of the present application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0043] In the description of the embodiments of the present application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0046] It should be understood that the term "and / or" used in the embodiments of the present application is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the embodiments of the present application generally indicates that the associated objects before and after are in an "or" relationship.

[0047] In the description of the embodiments of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the embodiments of the present application, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other.

[0048] Although the present disclosure has been described in detail above with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present application. Therefore, these modifications or improvements made without departing from the spirit of the present disclosure all fall within the scope of protection claimed by the present disclosure.

Claims

1. A needle guide device, characterized in that: The invention comprises a base, a first needle guide cylinder, two sub-needle guide cylinders connected to the first needle guide cylinder and adjustable relative to the first needle guide cylinder, wherein the two sub-needle guide cylinders are parallel to the first needle guide cylinder; the base is fixed to the target tissue by a fixing nail; the first needle guide cylinder is connected to the base by a rotating joint, and the rotating joint allows the first needle guide cylinder to adjust its angle relative to the base in a conical area; The first needle guide cylinder and the two sub-needle guide cylinders have a retractable movable guiding portion, and the movable guiding portion is used to adjust the guiding length of the needle guide cylinder. The two sub-needle guide cylinders can rotate relative to the axis where the first needle guide cylinder is located and / or change the distance relative to the axis.

2. The needle guide device according to claim 1, characterized in that: The rotating joint is a ball joint, and the rotating joint comprises a spherical rotor and a spherical rotating space. The first needle guide tube passes through the rotor, and the rotating space is arranged on the base.

3. The needle guide device according to claim 2, characterized in that: The base includes two buckling parts which are separated into upper and lower parts. The two buckling parts are buckled to form the rotation space. The two buckling parts are provided with locking bolts. When the locking bolts are locked, the two buckling parts are pressed together to fix the rotor.

4. The needle guide device according to claim 1, characterized in that: The two sub-needle guide cylinders are connected to the first needle guide cylinder via a connector, one end of the connector is rotatably connected to the first needle guide cylinder, the connector is provided with a travel groove, and the sub-needle guide cylinder can approach or move away from the first needle guide cylinder in the travel groove.

5. The needle guide device according to claim 4, characterized in that: The travel groove is a through groove that penetrates the thickness of the connecting piece, and the sub-guide needle tube is inserted into the travel groove; The sub-needle guide cylinder is provided with a limiting portion and a nut, and the limiting portion and the nut are used to fix the sub-needle guide cylinder relative to the travel groove.

6. The needle guide device according to claim 4, characterized in that: The connecting pieces corresponding to the two sub-needle guide cylinders are rotatably connected to the first needle guide cylinder through collars, and the two collars are sequentially distributed along the axial direction of the first needle guide cylinder. The first needle guide cylinder is provided with a nut for locking the connecting piece, and when the nut is locked, the connecting piece is prevented from rotating relative to the first needle guide cylinder.

7. The needle guide device according to claim 6, characterized in that: The edge of the travel groove is provided with a distance scale, and the outer periphery of the collar is provided with an angle scale.

8. The needle guide device according to claim 1, characterized in that: The movable guide part is an inner sleeve arranged in the first needle guide cylinder or the two sub-needle guide cylinders, a spring is arranged between the inner sleeve and the first needle guide cylinder or the two sub-needle guide cylinders, and the inner sleeve can move axially relative to the first needle guide cylinder or the two sub-needle guide cylinders.

9. The needle guide device according to claim 1, characterized in that: At least one positioning guide sleeve is arranged on the base, and the positioning guide sleeve is used to penetrate the fixing nail to fix the base to the target tissue.

10. The needle guide device according to claim 9, characterized in that: There are two positioning guide sleeves, one of which continues to extend near one end of the target tissue and is provided with positioning teeth at the end, and the positioning teeth are used to contact the target tissue to prevent the needle guide device from rotating.

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