Femoral neck positioning guider

Abstract

The utility model relates to a femoral neck positioning guider which comprises a center shaft screw rod, a first connecting sleeve, two second connecting sleeves, a three-hole hollow screw positioning sleeve, a first hollow screw, two second hollow screws and three third hollow screws, the first connecting sleeve is arranged at one end of the center shaft screw rod in a sleeved mode, and the first connecting sleeve is provided with a first inner threaded hole perpendicular to the center shaft screw rod; the first hollow screw penetrates through the first inner threaded hole, the second connecting sleeve is arranged at the other end of the middle shaft screw rod, the second connecting sleeve is provided with a second inner threaded hole perpendicular to the middle shaft screw rod, the second hollow screw penetrates through the second inner threaded hole, the three-hole hollow screw positioning sleeve is detachably arranged on the middle shaft screw rod, and the three-hole hollow screw positioning sleeve is provided with a third inner threaded hole. The third hollow screw penetrates through the third inner threaded hole, and the first hollow screw, the second hollow screw and the third hollow screw penetrate through kirschner wires respectively. The three-hole hollow screw positioning sleeve has the advantages that the three-hole hollow screw positioning sleeve is convenient to dismantle, and a kirschner wire driven by the third hollow screw can be nailed between an affected femoral head and a femoral neck.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a femoral neck positioning guide. Background Art

[0002] Femoral neck hollow screw fixation is the main internal fixation method for femoral neck fractures. One of the key operations of hollow screw internal fixation surgery is the insertion of positioning Kirschner wires, which determines the position and direction of the screws in the femoral neck and plays an important role in the success or failure of the operation. Due to the special anatomical structure of the femoral neck, the deep and hidden position, and the differences in neck-shaft angles and anteversion angles of different individuals, it is difficult to correctly insert the positioning Kirschner wires. If hollow screw Kirschner wires are repeatedly inserted during surgery, it may damage the blood supply of the femoral head and cause complications of femoral head necrosis; it may also cause dynamic stress at the needle-bone interface due to multiple needle insertions, which is easy to cause bone absorption, thereby causing the fixation nail to loosen. In addition, some scholars have reported that the quality of femoral neck fracture reduction also affects fracture healing. The reduction quality is an independent predictor of secondary femoral head necrosis after femoral neck fracture internal fixation. Good anatomical reduction can reduce the possibility of femoral head necrosis after surgery. Therefore, how to correctly insert the positioning Kirschner wire is particularly important. The use of hollow nail guides can not only simplify the insertion of hollow nails, reduce the blindness of surgical operations, and reduce the risks to patients caused by long-term surgery and repeated operations, but also protect the blood supply to the femoral head to the greatest extent and reduce the risk of femoral head necrosis.

[0003] At present, a patent with the announcement number "CN213098259U" discloses a novel femoral neck hollow screw fixation guide, but the guide has the following defects: the three-hole hollow screw positioning sleeve is connected to the central axis screw through the first adjustment knob and cannot be removed relative to the central axis screw. During the operation, when the hollow bone screw is inserted through the guide sleeve on the three-hole hollow screw positioning sleeve, the three-hole hollow screw positioning sleeve has a problem of occupying space, resulting in the doctor having insufficient operating space to implant the bone screw. The operation process is relatively long, which is somewhat disadvantageous to the patient.

[0004] There are also a few femoral neck hollow screw fixation guides whose three-hole hollow screw positioning sleeves and central axis screws are detachable and can be quickly disassembled when operating the bone screws. However, in this type of structural design, the three-hole hollow screw positioning sleeves are generally designed on one side of the central axis screw, resulting in the bone screws not being nailed into the middle area of ​​the femoral head when the bone screws are driven in, and may be nailed close to the edge. For patients with osteoporosis, this may damage the bone and affect the smooth progress of the operation or affect postoperative recovery.

[0005] Based on this, it is necessary to develop a new femoral neck positioning guide. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a femoral neck positioning guide, which effectively overcomes the defects of the prior art.

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] A femoral neck positioning guide, comprising a central axis screw, a first connecting sleeve, two second connecting sleeves, a three-hole hollow nail positioning sleeve, a first hollow screw, two second hollow screws and three third hollow screws, wherein the first connecting sleeve is mounted on one end of the central axis screw, the first connecting sleeve has a first internal threaded hole arranged vertically relative to the central axis screw, the first hollow screw passes through the first internal threaded hole and is screwed together, the two second connecting sleeves are mounted on the other end of the central axis screw, the second connecting sleeve has a second internal threaded hole vertically arranged relative to the central axis screw, the two second The hollow screws respectively pass through the two second internal threaded holes and are screwed together. The three-hole hollow nail positioning sleeve is detachably mounted on the central axis screw. The three-hole hollow nail positioning sleeve has three parallel third internal threaded holes. The third internal threaded holes are inclined relative to the central axis screw. The three third hollow screws respectively pass through the three third internal threaded holes and are screwed together. Kirschner wires are respectively inserted into the first hollow screw, the two second hollow screws and the three third hollow screws. The Kirschner wires in the three third hollow screws are distributed around the central axis screw.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the lengths of the Kirschner wires in the three third hollow screws mentioned above are increased or decreased.

[0011] Furthermore, the above-mentioned Kirschner wires are all provided with scale lines along their length direction.

[0012] Furthermore, the tail ends of the above-mentioned first hollow screw, the second hollow screw and the third hollow screw are all provided with joints with polygonal grooves therein, and the nail head ends are all provided with self-tapping threads, and the cavities of the above-mentioned first hollow screw, the second hollow screw and the third hollow screw pass through the bottom of the corresponding groove of the above-mentioned joints.

[0013] Furthermore, the first hollow screw, the two second hollow screws and the three third hollow screws all point to one side of the central axis screw.

[0014] Furthermore, the end portion of the three-hole hollow nail positioning sleeve corresponding to one side of the above-mentioned central axis screw is provided with an interlocking groove extending toward the other end thereof, and the above-mentioned interlocking groove vertically penetrates the upper and lower ends of the above-mentioned three-hole hollow nail positioning sleeve, and the above-mentioned three-hole hollow nail positioning sleeve is provided with a first locking piece, and the above-mentioned first locking piece is used to be locked and fixed with the above-mentioned central axis screw or released, and the three above-mentioned third internal threaded holes are distributed in a herringbone shape.

[0015] Furthermore, the first locking member is a bolt, and one side of the three-hole hollow nail positioning sleeve is provided with a bolt hole penetrating into the engaging groove, the bolt hole is vertically arranged with the central axis screw, and the bolt is screwed into the bolt hole.

[0016] Furthermore, the axes of the third internal threaded holes respectively form an angle α with the central axis screw, and 130°<α<140°.

[0017] Furthermore, an adjuster is installed at the other end of the above-mentioned central axis screw rod, and the two above-mentioned second connecting sleeves are respectively connected to the above-mentioned adjuster, and the above-mentioned adjuster is used to adjust the angular orientation of the two above-mentioned second connecting sleeves.

[0018] Furthermore, the above-mentioned adjuster includes an adjusting rod, a through hole vertically passing through the middle of the above-mentioned adjusting rod is provided, the other end of the above-mentioned central axis screw passes through the through hole and is locked or separated by a second locking piece, the above-mentioned second connecting sleeves are all T-shaped sleeves, and the two vertical sleeves of the above-mentioned second connecting sleeves are provided with through holes vertically passing through both sides thereof, the two ends of the above-mentioned adjusting rod respectively pass through the through holes of the two vertical sleeves, and are respectively locked or separated from the above-mentioned vertical sleeves by a third locking piece, and the above-mentioned second internal threaded holes are respectively provided in the horizontal sleeves of the two above-mentioned second connecting sleeves.

[0019] The beneficial effects of the utility model are: reasonable structural design, easy removal of the three-hole hollow nail positioning sleeve, and ensuring that the Kirschner wire driven through the third hollow screw during the operation can be nailed into the middle position of the patient's femoral head and femoral neck, improving the problem that the edges of the conventional guide are easily nailed into the Kirschner wire and the hollow nail to damage the bone, which is not conducive to the smooth progress of the operation and postoperative recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the femoral neck positioning guide of the utility model when in use;

[0021] Figure 2 It is a structural elevation view of the femoral neck positioning guide of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the femoral neck positioning guide of the utility model from another perspective;

[0023] Figure 4 The utility model is a schematic structural diagram of the assembly of a three-hole hollow nail positioning sleeve and a central axis screw in a femoral neck positioning guide.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. Central axis screw; 2. First connecting sleeve; 3. Second connecting sleeve; 4. Three-hole hollow nail positioning sleeve; 5. First hollow screw; 6. Second hollow screw; 7. Third hollow screw; 8. Kirschner wire; 10. Regulator; 41. First locking piece; 101. Adjusting rod. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] Example: Figure 1 and 2 As shown, a femoral neck positioning guide of the present embodiment includes a central axis screw 1, a first connecting sleeve 2, two second connecting sleeves 3, a three-hole hollow nail positioning sleeve 4, a first hollow screw 5, two second hollow screws 6 and three third hollow screws 7. The above-mentioned first connecting sleeve 2 is installed at one end of the above-mentioned central axis screw 1, and the above-mentioned first connecting sleeve 2 has a first internal threaded hole arranged relatively vertically with the above-mentioned central axis screw 1. The above-mentioned first hollow screw 5 passes through the above-mentioned first internal threaded hole and is screwed together. The two above-mentioned second connecting sleeves 3 are installed at the other end of the above-mentioned central axis screw 1, and the above-mentioned second connecting sleeve 3 has a second internal threaded hole perpendicular to the above-mentioned central axis screw 1. The above-mentioned second hollow screws 6 respectively pass through the two above-mentioned second internal threaded holes and are screwed together. The above-mentioned three-hole hollow nail positioning sleeve 4 is detachably mounted on the above-mentioned central axis screw 1. The above-mentioned three-hole hollow nail positioning sleeve 4 has three parallel third internal threaded holes. The above-mentioned third internal threaded holes are relatively inclined to the above-mentioned central axis screw 1. The three above-mentioned third hollow screws 7 respectively pass through the three above-mentioned third internal threaded holes and are screwed together. Kirschner wires 8 are respectively inserted into the above-mentioned first hollow screw 5, the two second hollow screws 6 and the three third hollow screws 7. The Kirschner wires 8 in the three above-mentioned third hollow screws 7 are distributed around the above-mentioned central axis screw 1.

[0028] During the operation, the same end of the first hollow screw 5, the two second hollow screws 6 and the three third hollow screws 7 are all pointed to the patient's bone, and the Kirschner wires 8 are inserted into the above hollow screws and driven into the patient's bone through the Kirschner wires 8. The details are as follows:

[0029] The three-point fixation method is used to determine the lateral axis of the femur, the lateral process of the greater trochanter (point P1 in the figure); the anterior edge of the lateral condyle of the femur (point P2 in the figure); the posterior edge of the lateral condyle of the femur (point P3 in the figure), the midpoint between the anterior edge of the lateral condyle of the femur P2 and the posterior edge of the lateral condyle of the femur P3 is P0, and P0-P1 is the lateral axis of the femur. In the actual operation process, three Kirschner wires are placed at the lateral process of the greater trochanter P1, the anterior edge of the lateral condyle of the femur P2, and the posterior edge of the lateral condyle of the femur P3, respectively, and then the first connecting sleeve 2 and the two second connecting sleeves are adjusted to the position, inserted on the three Kirschner wires and determined, and the central axis screw 1 is the lateral axis of the femur. Then adjust the position of the three-hole hollow nail positioning sleeve 4. Since the neck-shaft angle of the guide is determined, it is only necessary to adjust the position of the anteversion angle. After the position is determined, fix the three-hole hollow nail positioning sleeve 4, the position of the three-hole hollow nail positioning sleeve 4 is determined, and the positions of the three third hollow screws 7 are determined at the same time. Afterwards, a Kirschner wire is driven in along each of the three third hollow screws 7, and a C-arm X-ray machine is used for perspective. After the Kirschner wire is in a good position, the guide can be removed. The purpose of the guide is to guide the Kirschner wire that passes through the hollow screw. Before use, it is necessary to first use a Kirschner needle to locate the three points: the lateral process of the greater trochanter P1; the anterior edge of the lateral condyle of the femur P2; and the posterior edge of the lateral condyle of the femur P3, and then use the positioning guide of this embodiment. When driving the hollow screws at the three third hollow screws 7, since the three-hole hollow nail positioning sleeve 4 is detachably connected to the three third hollow screws 7, after the three Kirschner wires are inserted, the three-hole hollow nail positioning sleeve 4 is separated from the central axis screw 1, and the three third hollow screws 7 are withdrawn to avoid occupying space, leaving a larger operating space for the doctor, which helps to reduce the difficulty of the operation and shorten the operation time. In this embodiment, the three-hole hollow nail positioning sleeve 4 is detachably mounted on the above-mentioned central axis screw 1, and the Kirschner wires 8 in the three third hollow screws 7 are distributed around the above-mentioned central axis screw 1. Therefore, when the Kirschner wires 8 at the three third hollow screws 7 are driven into the femoral head, they are in the middle area of ​​the femoral head and will not be close to the edge. Even for patients with osteoporosis, it will basically not cause the problem of bone damage at the edge and loose driving. On the whole, the structural design is reasonable, the three-hole hollow nail positioning sleeve is easy to remove, and it can ensure that the Kirschner wire driven through the third hollow screw during the operation can be nailed into the middle position of the patient's femoral head and femoral neck, improving the problem that the conventional guide is prone to the edge of the Kirschner wire and hollow nail being driven into the bone, which is not conducive to the smooth progress of the operation and postoperative recovery.

[0030] As a preferred embodiment, the lengths of the Kirschner wires 8 in the three third hollow screws 7 are increased or decreased.

[0031] In the above embodiment, the lengths of the Kirschner wires 8 at the three third hollow screws 7 form an "arithmetic progression". During the insertion process, the exposed lengths of the tail ends are different, which is convenient for the doctor to perform the insertion operation and will not hit other needle bodies during the insertion process. Specifically, during the insertion process, the shortest Kirschner wire 8 is inserted first, and the longest Kirschner wire 8 is inserted last. In this way, the Kirschner wires 8 will not interfere with each other when being inserted.

[0032] In this embodiment, the Kirschner wire 8 is provided with scale lines along its length direction. According to the scale lines, the length of the needle entering the femoral head can be clearly judged.

[0033] As a preferred embodiment, the tail ends of the first hollow screw 5, the second hollow screw 6 and the third hollow screw 7 are all provided with joints with polygonal grooves therein, the nail head ends are all provided with self-tapping threads, and the cavities of the first hollow screw 5, the second hollow screw 6 and the third hollow screw 7 pass through the bottom of the corresponding grooves of the above-mentioned joints.

[0034] In the above embodiment, the self-tapping threads at the nail heads of the first hollow screw 5, the second hollow screw 6 and the third hollow screw 7 help to be closely combined with the bone after being nailed into the bone, and the nailing is relatively firm. When treating patients with osteoporosis, the Kirschner wire 8 is more firmly combined with the bone and is not easy to be separated. In addition, the groove-shaped connector design at the tail end can match the drilling tool, such as a drill bit embedded in the groove of the connector, driving the hollow screw to rotate, and the operation is more convenient.

[0035] In this embodiment, the first hollow screw 5, the two second hollow screws 6 and the three third hollow screws 7 all point to one side of the central axis screw 1. This design matches the orientation of the guide during the surgical procedure.

[0036] As a preferred embodiment, Figure 2 and 3 As shown, the end portion of one side of the three-hole hollow nail positioning sleeve 4 corresponding to the above-mentioned central axis screw 1 is provided with an engaging groove (indicated by b in the figure) extending toward the other end thereof, and the three-hole hollow nail positioning sleeve 4 is shaped like a saddle, and the above-mentioned engaging groove vertically penetrates the upper and lower ends of the above-mentioned three-hole hollow nail positioning sleeve 4, and the above-mentioned three-hole hollow nail positioning sleeve 4 is provided with a first locking piece 41, and the above-mentioned first locking piece 41 is used for locking and fixing or releasing with the above-mentioned central axis screw 1, and the three above-mentioned third internal threaded holes are distributed in a herringbone shape.

[0037] In the above embodiment, during installation, first unlock the first locking member 41, and clamp one end of the three-hole hollow nail positioning sleeve 4 on the central axis screw 1 through the interlocking groove in a direction perpendicular to the central axis screw 1 (the three-hole hollow nail positioning sleeve 4 is "straddling" and clamped on the central axis screw 1 through the interlocking groove), and then, after adjusting the angle and orientation, lock it through the first locking member 41. When the three-hole hollow nail positioning sleeve 4 needs to be removed during surgery, unlock the first locking member 41, and move the three-hole hollow nail positioning sleeve 4 out of the extension direction of the third internal threaded hole, which is very convenient.

[0038] In this embodiment, the first locking member 41 is a bolt, and one side of the three-hole hollow nail positioning sleeve 4 is provided with a bolt hole penetrating into the above-mentioned fitting groove, and the above-mentioned bolt hole is vertically arranged with the above-mentioned central axis screw rod 1, and the above-mentioned bolt is screwed into the above-mentioned bolt hole. The nut portion of the first locking member 41 is provided with a butterfly knob, which is easy to operate and rotate.

[0039] The axes of the third internal threaded holes respectively form an angle α with the central axis screw rod 1 (i.e. the angle between the third hollow screw 7 and the central axis screw rod 1 at that location), and 130°<α<140°, preferably 135°.

[0040] As a preferred embodiment, an adjuster 10 is installed at the other end of the above-mentioned central axis screw 1, and the two above-mentioned second connecting sleeves 3 are respectively connected to the above-mentioned adjuster 10, and the above-mentioned adjuster 10 is used to adjust the angular orientation of the two above-mentioned second connecting sleeves 3.

[0041] In the above embodiment, the adjuster 10 is used to adjust the angles and positions of the two second hollow screws 6. Specifically, the angles and positions can be adjusted by rotating around the central axis screw 1.

[0042] In this embodiment, the regulator 10 includes an adjusting rod 101, a through hole vertically passing through the middle of the adjusting rod 101, the other end of the central axis screw rod 1 passes through the through hole and is locked or separated by a second locking member (indicated by c in the figure), the second connecting sleeves 3 are all T-shaped sleeves, the vertical sleeves of the two second connecting sleeves 3 are provided with through holes vertically passing through both sides thereof, the two ends of the adjusting rod 101 respectively pass through the through holes of the two vertical sleeves and are respectively locked or separated from the vertical sleeves by a third locking member, and the second internal threaded holes are respectively provided in the horizontal sleeves of the two second connecting sleeves 3. The adjusting rod 101 can be rotated relative to the central axis screw rod 1, thereby adjusting the angular orientation of the two second connecting sleeves 3, so as to adjust the position of the second hollow screws 6 driven from the two second connecting sleeves 3.

[0043] In this embodiment, the second locking member is a bolt that crosses the adjustment rod 101 and is screwed together (a butterfly knob is set at the tail end of the bolt), and the third locking member is a bolt that passes through the vertical sleeve and is screwed together (a butterfly knob is set at the tail end of the bolt).

[0044] In the description of the present invention, it should 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 invention 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 invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, 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 the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. 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 contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A femoral neck positioning guide, characterized in that: The invention comprises a central axis screw rod (1), a first connecting sleeve (2), two second connecting sleeves (3), a three-hole hollow nail positioning sleeve (4), a first hollow screw (5), two second hollow screws (6) and three third hollow screws (7), wherein the first connecting sleeve (2) is mounted on one end of the central axis screw rod (1), the first connecting sleeve (2) has a first internal threaded hole arranged perpendicularly to the central axis screw rod (1), the first hollow screw (5) passes through the first internal threaded hole and is screwed together, and the two second connecting sleeves (3) are mounted on the other end of the central axis screw rod (1), the second connecting sleeve (3) has a second internal threaded hole perpendicular to the central axis screw rod (1), and the two second hollow screws (5) are screwed together. The center screws (6) respectively pass through the two second internal threaded holes and are screwed together. The three-hole hollow nail positioning sleeve (4) is detachably mounted on the central axis screw (1). The three-hole hollow nail positioning sleeve (4) has three parallel third internal threaded holes. The third internal threaded holes are arranged relatively inclined to the central axis screw (1). The three third hollow screws (7) respectively pass through the three third internal threaded holes and are screwed together. Kirschner wires (8) are respectively inserted into the first hollow screw (5), the two second hollow screws (6) and the three third hollow screws (7). The Kirschner wires (8) in the three third hollow screws (7) are distributed around the central axis screw (1).

2. A femoral neck positioning guide according to claim 1, characterized in that: The lengths of the Kirschner wires (8) in the three third hollow screws (7) are increased or decreased.

3. A femoral neck positioning guide according to claim 1, characterized in that: The Kirschner wires (8) are all provided with scale lines along their length direction.

4. A femoral neck positioning guide according to claim 1, characterized in that: The tail ends of the first hollow screw (5), the second hollow screw (6) and the third hollow screw (7) are all provided with joints with polygonal grooves therein, and the cavities of the first hollow screw (5), the second hollow screw (6) and the third hollow screw (7) pass through the bottom of the corresponding groove of the joints.

5. A femoral neck positioning guide according to claim 1, characterized in that: The first hollow screw (5), the two second hollow screws (6) and the three third hollow screws (7) all point to one side of the central axis screw rod (1).

6. A femoral neck positioning guide according to claim 5, characterized in that: The end of the three-hole hollow nail positioning sleeve (4) corresponding to one side of the central axis screw (1) is provided with an engaging groove extending toward the other end thereof, and the engaging groove vertically penetrates the upper and lower ends of the three-hole hollow nail positioning sleeve (4). The three-hole hollow nail positioning sleeve (4) is provided with a first locking piece (41), and the first locking piece (41) is used to be locked and fixed with the central axis screw (1) or released, and the three third internal threaded holes are distributed in a herringbone shape.

7. A femoral neck positioning guide according to claim 6, characterized in that: The first locking member (41) is a bolt, and one side of the three-hole hollow nail positioning sleeve (4) is provided with a bolt hole penetrating into the engaging groove, the bolt hole is vertically arranged with the central axis screw rod (1), and the bolt is screwed into the bolt hole.

8. A femoral neck positioning guide according to claim 1, characterized in that: The axes of the third internal threaded holes respectively form an angle α with the central axis screw (1), and 130°<α<140°.

9. A femoral neck positioning guide according to any one of claims 1 to 8, characterized in that: The other end of the central axis screw rod (1) is provided with an adjuster (10), and the two second connecting sleeves (3) are respectively connected to the adjuster (10), and the adjuster (10) is used to adjust the angular orientation of the two second connecting sleeves (3).

10. A femoral neck positioning guide according to claim 9, characterized in that: The adjuster (10) comprises an adjusting rod (101), a through hole vertically penetrating the adjusting rod (101) is provided in the middle of the adjusting rod (101), the other end of the central axis screw rod (1) passes through the through hole and is locked or separated by a second locking member, the second connecting sleeves (3) are all T-shaped sleeves, the vertical sleeves of the two second connecting sleeves (3) are provided with through holes vertically penetrating the two sides thereof, the two ends of the adjusting rod (101) respectively pass through the through holes of the two vertical sleeves, and are respectively locked or separated from the vertical sleeves by a third locking member, and the second internal threaded holes are respectively provided in the horizontal sleeves of the two second connecting sleeves (3).

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