Orthopedic positioning guider

Abstract

The novel positioning guider for the orthopedics department comprises a center shaft screw rod, a greater trochanter lateral process positioning sleeve, a first connecting sleeve, a thighbone lateral condyle front edge positioning sleeve, a thighbone lateral condyle rear edge positioning sleeve, three guide sleeves, a three-hole hollow nail positioning sleeve and two second connecting sleeves, and the first connecting sleeve is arranged at one end of the center shaft screw rod in a sleeving mode; the first connecting sleeve is provided with a first inner threaded hole, the large rotor outer side protruding positioning sleeve penetrates through the first inner threaded hole, the center shaft screw is provided with a positioning seat, the three-hole hollow screw positioning sleeve is arranged on one side of the positioning seat and provided with three second inner threaded holes, the guide sleeve penetrates through the second inner threaded holes, and the adjuster is arranged at the other end of the center shaft screw. The thighbone outer side condyle front edge positioning sleeve and the thighbone outer side condyle rear edge positioning sleeve are connected with the adjuster and are respectively provided with a third inner threaded hole, and the second connecting sleeve penetrates through the third inner threaded holes. The utility model has the advantage that the three-hole hollow nail positioning sleeve can be detached relative to the positioning seat.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an orthopedic positioning guider. 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 the positioning guide pin, which determines the position and direction of the screw 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 the neck-shaft angle and anteversion angle of different individuals, it is difficult to correctly insert the positioning guide pin. If the hollow screw guide pin is repeatedly inserted during the operation, 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 pin 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 guide pin 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 "CN 213098259U" 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 from 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] Based on this, it is necessary to develop a new orthopedic positioning guide that can be removed and avoided during the implantation of bone screws, so that the fixation has a larger operating space and the operation is easier to proceed smoothly. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an orthopedic positioning guide, which effectively overcomes the defects of the prior art.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] An orthopedic positioning guide comprises a central axis screw, a lateral protrusion positioning sleeve of the greater trochanter, a first connecting sleeve, a front edge positioning sleeve of the lateral condyle of the femur, a rear edge positioning sleeve of the lateral condyle of the femur, three guiding sleeves, a three-hole hollow nail positioning sleeve and two second connecting sleeves, 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 obliquely relative to the central axis screw, the lateral protrusion positioning sleeve of the greater trochanter passes through the first internal threaded hole and is screwed together, a positioning seat is movably mounted on the central axis screw, the three-hole hollow nail positioning sleeve is detachably mounted on one side of the positioning seat, and the three-hole hollow nail positioning sleeve has three parallel second internal threaded holes, The above-mentioned second internal threaded hole is arranged relatively inclined with the above-mentioned central axis screw, the three above-mentioned guide sleeves respectively pass through the three above-mentioned second internal threaded holes and are screwed together, the other end of the above-mentioned central axis screw is equipped with an adjuster, the above-mentioned lateral femoral condyle anterior edge positioning sleeve and the above-mentioned lateral femoral condyle posterior edge positioning sleeve are respectively connected with the above-mentioned adjuster, the above-mentioned adjuster is used to adjust the angle orientation of the above-mentioned lateral femoral condyle anterior edge positioning sleeve and the above-mentioned lateral femoral condyle posterior edge positioning sleeve, the above-mentioned lateral femoral condyle anterior edge positioning sleeve and the lateral femoral condyle posterior edge positioning sleeve respectively have a third internal threaded hole perpendicular to the above-mentioned central axis screw, the two above-mentioned second connecting sleeves respectively pass through the two above-mentioned third internal threaded holes in a one-to-one correspondence and are screwed together.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the first connecting sleeve comprises a vertical sleeve section threadedly connected to the central shaft screw sleeve and an oblique sleeve section inclined to the vertical sleeve section, and the oblique sleeve section is provided with the first internal threaded holes passing through both ends thereof.

[0010] Furthermore, an angle α is formed between the axis of the first internal threaded hole and the central axis screw, and 130°<α<140°.

[0011] Furthermore, the above-mentioned adjuster includes an adjusting rod and two second connecting sleeves, 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 the first locking piece, the vertical sleeves of the two 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 above-mentioned second connecting sleeves, and are respectively locked or separated from the above-mentioned second connecting sleeves by the second locking piece, and the above-mentioned third internal threaded hole is provided in the horizontal sleeves of the two above-mentioned second connecting sleeves.

[0012] Furthermore, an internal thread is provided on the inner wall of the vertical sleeve of the second connecting sleeve, and a first butterfly knob for abutting or separating from the end of the adjusting rod is threadedly installed on the lower end of the vertical sleeve of the second connecting sleeve. The first butterfly knob constitutes the second locking member, and one end of the through hole of the adjusting rod is provided with a sleeve portion which is sleeved outside the central axis screw, and a third butterfly knob is threadedly connected to the side wall of the sleeve portion, and the third butterfly knob is used to be screwed until it abuts or separates from the central axis screw.

[0013] Furthermore, the adjusting rod is provided with scales along its length direction.

[0014] Furthermore, the above-mentioned positioning seat includes a seat body and a connecting head, the above-mentioned connecting head is arranged on one side of the above-mentioned seat body, the above-mentioned connecting head is provided with a channel for the above-mentioned central axis screw to pass through, the side end of the above-mentioned connecting head is provided with a fourth threaded hole perpendicular to the above-mentioned channel, a second butterfly knob is screwed into the above-mentioned fourth threaded hole, and the above-mentioned second butterfly knob is used to be screwed to abut or separate from the above-mentioned central axis screw, a slideway parallel to the above-mentioned second internal threaded hole is provided on the other side of the above-mentioned seat body, and a slide groove is provided on one side of the above-mentioned three-hole hollow nail positioning sleeve, and is slidably connected to the above-mentioned slideway through the slide groove.

[0015] Furthermore, a limit block is provided at the position on the other side of the seat body corresponding to one end of the slideway, and the three-hole hollow nail positioning sleeve can slide along the slideway from one end of the slideway to the other end and abut against the limit block, or slide out from one end of the slideway.

[0016] Furthermore, the three second internal threaded holes are distributed in a finished shape.

[0017] Furthermore, the two third internal threaded holes are distributed at an angle.

[0018] The beneficial effects of the utility model are: reasonable structural design, during the operation, the three-hole hollow nail positioning sleeve together with the three guide sleeves can be removed and withdrawn relative to the positioning seat, giving the hollow bone screw a larger operating space, helping to reduce the difficulty of the operation and shorten the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the orthopedic positioning guide of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the orthopedic positioning guide of the utility model after removing the lateral process positioning sleeve of the greater trochanter, the anterior edge positioning sleeve of the lateral femoral condyle and the posterior edge positioning sleeve of the lateral femoral condyle;

[0021] Figure 3 It is an assembly diagram of the positioning seat and the three-hole hollow nail positioning sleeve in the orthopedic positioning guide of the utility model;

[0022] Figure 4The utility model is an exploded view of the positioning seat and the three-hole hollow nail positioning sleeve in the orthopedic positioning guide.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Central axis screw; 2. Greater trochanter lateral protrusion positioning sleeve; 3. First connecting sleeve; 4. Lateral femoral condyle anterior edge positioning sleeve; 5. Lateral femoral condyle posterior edge positioning sleeve; 6. Guide sleeve; 7. Three-hole hollow nail positioning sleeve; 8. Second connecting sleeve; 9. Positioning seat; 10. Regulator; 91. Seat body; 92. Connector; 101. Adjusting rod; 103. First butterfly knob; 921. Second butterfly knob; 922. Limit block. DETAILED DESCRIPTION

[0025] 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.

[0026] Example: Figure 1 and 2 As shown, the orthopedic positioning guide of this embodiment includes a central axis screw 1, a lateral protrusion positioning sleeve 2 of the greater trochanter, a first connecting sleeve 3, a front edge positioning sleeve of the lateral condyle of the femur 4, a rear edge positioning sleeve of the lateral condyle of the femur 5, three guide sleeves 6, a three-hole hollow nail positioning sleeve 7 and two second connecting sleeves 8, the first connecting sleeve 3 is installed at one end of the central axis screw 1, the first connecting sleeve 3 has a first internal threaded hole arranged obliquely relative to the central axis screw 1, the lateral protrusion positioning sleeve 2 of the greater trochanter passes through the first internal threaded hole and is screwed together, the central axis screw 1 is movably provided with a positioning seat 9, the three-hole hollow nail positioning sleeve 7 is detachably installed on one side of the positioning seat 9, and the three-hole hollow nail positioning sleeve 7 has three parallel second internal threaded holes ( In the figure, d is indicated), the above-mentioned second internal threaded hole is arranged relatively tilted with the above-mentioned central axis screw 1, the three above-mentioned guide sleeves 6 respectively pass through the three above-mentioned second internal threaded holes and are screwed together, the other end of the above-mentioned central axis screw 1 is equipped with an adjuster 10, the above-mentioned femoral lateral condyle anterior edge positioning sleeve 4 and the femoral lateral condyle posterior edge positioning sleeve 5 are respectively connected with the above-mentioned adjuster 10, the above-mentioned adjuster 10 is used to adjust the angular orientation of the above-mentioned femoral lateral condyle anterior edge positioning sleeve 4 and the femoral lateral condyle posterior edge positioning sleeve 5, the above-mentioned femoral lateral condyle anterior edge positioning sleeve 4 and the femoral lateral condyle posterior edge positioning sleeve 5 respectively have a third internal threaded hole perpendicular to the above-mentioned central axis screw 1, the two above-mentioned second connecting sleeves 8 respectively pass through the two above-mentioned third internal threaded holes one by one, and are screwed together.

[0027] Among them, the greater trochanter lateral process positioning sleeve 2, three guide sleeves 6, the femoral lateral condyle anterior edge positioning sleeve 4 and the femoral lateral condyle posterior edge positioning sleeve 5 are all hollow sleeves with external threads. During the operation, the greater trochanter lateral process positioning sleeve 2, three guide sleeves 6, the femoral lateral condyle anterior edge positioning sleeve 4 and the femoral lateral condyle posterior edge positioning sleeve 5 all point to the patient's bone, and guide needles are inserted into the above sleeves, and hollow nails are driven into the patient's bone through the guide needles. The details are as follows:

[0028] The three-point fixation method is used to determine the lateral femoral axis, the lateral process of the greater trochanter (point P1 in the figure); the anterior edge of the lateral femoral condyle (point P2 in the figure); the posterior edge of the lateral femoral condyle (point P3 in the figure), the midpoint between the anterior edge of the lateral femoral condyle P2 and the posterior edge of the lateral femoral condyle P3 is P0, and P0-P1 is the lateral femoral axis. In the actual operation, three guide pins are placed at the lateral process of the greater trochanter P1, the anterior edge of the lateral femoral condyle P2, and the posterior edge of the lateral femoral condyle P3, respectively, and then the lateral process of the greater trochanter positioning sleeve 2, the anterior edge of the lateral femoral condyle positioning sleeve 4, and the posterior edge of the lateral femoral condyle positioning sleeve 5 are adjusted to their positions, inserted on the three guide pins and determined, and the central axis screw 1 is the lateral femoral axis. Then adjust the position of the three-hole hollow nail positioning sleeve 7. Since the neck-shaft angle of the guide is determined, it is only necessary to adjust the anteversion angle. After the position is determined, fix the positioning seat 9, and the position of the three-hole hollow nail positioning sleeve 7 is determined. At the same time, the positions of the three guide sleeves 6 are determined. After the position of the guide sleeve 6 is determined, a guide needle is driven along each of the three guide sleeves 6. Use a C-arm X-ray machine for fluoroscopy. After the guide needle is in a good position, the guide can be removed. Then drive the hollow nail along the guide needle, and finally remove the guide needle. The purpose is to guide the guide needle of the hollow nail. Before use, the guide needle must be used to locate the lateral protrusion P1 of the greater trochanter; the anterior edge P2 of the lateral condyle of the femur; and the posterior edge P3 of the lateral condyle of the femur, and then the positioning guide of this embodiment can be used. When the hollow nails are driven into the three guide sleeves 6, since the positioning seat 9 and the three-hole hollow nail positioning sleeve 7 are detachably connected, after the three guide needles are inserted, the positioning seat 9 and the three-hole hollow nail positioning sleeve 7 are disassembled and the three-hole hollow nail positioning sleeve 7 is 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.

[0029] In this embodiment, the first internal threaded hole of the lateral protruding positioning sleeve 2 of the greater trochanter is tilted relative to the central axis screw 1, that is, the implanted hollow nail is tilted relative to the central axis screw 1 to avoid interference with the hollow nails implanted through the three guide sleeves 6.

[0030] In this embodiment, the first connecting sleeve 3 includes a vertical sleeve section that is inserted into and threadedly connected to the central axis screw rod 1 and an oblique sleeve section that is inclined to the vertical sleeve section. The oblique sleeve section is provided with the first internal threaded holes passing through both ends thereof. The first connecting sleeve 3 is threadedly connected to one end of the central axis screw rod 1, and the angle and orientation can be adjusted by rotation. The connection is also relatively stable. The design of the oblique sleeve section is consistent with the direction of the hollow nail, which plays a good guiding role.

[0031] In this embodiment, the axis of the first internal threaded hole forms an angle α with the central axis screw 1 (i.e., the angle between the guide sleeve 6 and the central axis screw 1 at that location), and 130°<α<140°, preferably 135°. The hollow nails at the three guide sleeves 6 have the same inclination angle as the hollow nails at the outer protrusion of the greater trochanter.

[0032] As a preferred embodiment, the above-mentioned adjuster 10 includes an adjusting rod 101, a through hole vertically passing through the middle of the above-mentioned adjusting rod 101 is provided, the other end of the above-mentioned central axis screw 1 passes through the through hole, and is locked or separated by the first locking piece, the above-mentioned second connecting sleeves 8 are all T-shaped sleeves, and the two vertical sleeves of the above-mentioned second connecting sleeves 8 are provided with through holes vertically passing through both sides thereof, the two ends of the above-mentioned adjusting rod 101 respectively pass through the through holes of the two above-mentioned second connecting sleeves 8, and are respectively locked or separated from the vertical sleeves of the above-mentioned second connecting sleeves 8 by the second locking piece, and the above-mentioned third internal threaded hole is provided in the horizontal sleeves of the two above-mentioned second connecting sleeves 8.

[0033] In the above embodiment, the adjusting rod 101 can be rotated relative to the central axis screw rod 1 to adjust the angular orientation of the two second connecting sleeves 8, so as to adjust the position of the hollow nail driven from the two second connecting sleeves 8.

[0034] In this embodiment, the inner wall of the vertical sleeve of the second connecting sleeve 8 is provided with an internal thread, and the lower end of the vertical sleeve of the second connecting sleeve 8 is threadedly installed with a first butterfly knob 103 for contacting or separating with the end of the adjusting rod 101, and the first butterfly knob 103 constitutes the second locking member, and one end of the through hole of the adjusting rod 101 is provided with a sleeve portion (indicated by c in the figure) sleeved outside the central axis screw 1, and the side wall of the sleeve portion is threadedly connected with a third butterfly knob, and the third butterfly knob is used to be screwed to contact or separate with the central axis screw 1. During installation, the position of the second connecting sleeve 8 along the axial direction of the adjusting rod 101 can be adjusted, and after adjustment, the adjusting rod 101 and the vertical sleeve of the second connecting sleeve 8 can be fixed by tightening the first butterfly knob 103, and at the same time, the displacement of the sleeve portion along the axial direction of the central axis screw 1 and the circumferential rotation angle can be adjusted, and after adjustment, it can be tightened by the third butterfly knob (indicated by b in the figure).

[0035] In this embodiment, the adjusting rod 101 is provided with scales along its length direction, and the scales can be used to assist in adjusting the axial position of the second connecting sleeve 8 at the end of the adjusting rod 101 .

[0036] As a preferred embodiment, Figure 3 and 4 As shown, the above-mentioned positioning seat 9 includes a seat body 91 and a connecting head 92, and the above-mentioned connecting head 92 is arranged on one side of the above-mentioned seat body 91. The above-mentioned connecting head 92 is provided with a channel for the above-mentioned central axis screw 1 to pass through, and the side end of the above-mentioned connecting head 92 is provided with a fourth threaded hole (represented by h in the figure) perpendicular to the above-mentioned channel, and a second butterfly knob 921 is screwed into the above-mentioned fourth threaded hole. The above-mentioned second butterfly knob 921 is used to be screwed to abut or separate from the above-mentioned central axis screw 1, and the other side of the above-mentioned seat body 91 is provided with a slideway (represented by e in the figure) parallel to the above-mentioned second internal threaded hole, and the above-mentioned three-hole hollow nail positioning sleeve 7 is provided with a slide groove (represented by f in the figure), and is slidably connected with the above-mentioned slideway through the slide groove.

[0037] In the above-mentioned embodiment, the axial position of the positioning seat 9 and the three-hole hollow nail positioning sleeve 7 on the central axis screw 1 can be adjusted. Specifically, by loosening the second butterfly knob 921, the connecting head 92 and the seat body 91 can move and rotate with the three-hole hollow nail positioning sleeve 7 along the central axis screw 1. After adjusting the position and angle, tighten the second butterfly knob 921 to fix it. The three-hole hollow nail positioning sleeve 7 can slide along the slideway on the other side of the seat body 91 to disengage from the slideway, thereby separating the three-hole hollow nail positioning sleeve 7 from the seat body 91 (during this sliding process, the sliding direction of the three-hole hollow nail positioning sleeve 7 is consistent with the long axis direction of the hollow nails inserted by the three guide sleeves 6). Therefore, during the hollow nail implantation process, the three-hole hollow nail positioning sleeve 7 can be operated to slide along the slideway (that is, the long axis direction of the hollow nail) to disengage from the seat body 91, and withdraw from the end of the hollow nail away from the bone, thereby providing a larger operating space for the hollow nail to be driven in.

[0038] As a preferred embodiment, a limit block 922 is provided at a position on the other side of the seat body 91 corresponding to one end of the slide, and the three-hole hollow nail positioning sleeve 7 can slide along the slide from one end of the slide to the other end and abut against the limit block 922, or slide out from one end of the slide.

[0039] In the above embodiment, a limit block 922 is provided at the other end of the slideway close to the patient's bone on the other side of the seat body 91. During assembly, the three-hole hollow nail positioning sleeve 7 slides from the other end of the slideway until it abuts against the limit block 922. During disassembly, it slides in the opposite direction to exit.

[0040] In this embodiment, the cross-section of the slide is elliptical or T-shaped, and the cross-section of the slide groove on one side of the three-hole hollow nail positioning sleeve 7 is a shape that matches the shape of the slide. The slide groove is nested outside the slide in a wrapped form as a whole, ensuring that the two can only slide along the length direction of the slide and will not be relatively separated in the cross-sectional direction.

[0041] In this embodiment, the three second internal threaded holes are distributed in a finished shape.

[0042] In this embodiment, the two third internal threaded holes are distributed at an angle.

[0043] 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.

[0044] In addition, 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 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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. An orthopedic positioning guide, Features: The invention comprises a central axis screw (1), a lateral protrusion positioning sleeve (2), a first connecting sleeve (3), a front edge positioning sleeve of the lateral condyle of the femur (4), a rear edge positioning sleeve of the lateral condyle of the femur (5), three guide sleeves (6), a three-hole hollow nail positioning sleeve (7) and two second connecting sleeves (8), wherein the first connecting sleeve (3) is mounted on one end of the central axis screw (1), the first connecting sleeve (3) has a first internal threaded hole arranged obliquely relative to the central axis screw (1), the lateral protrusion positioning sleeve (2) of the greater trochanter passes through the first internal threaded hole and is screwed together, a positioning seat (9) is movably mounted on the central axis screw (1), the three-hole hollow nail positioning sleeve (7) is detachably mounted on one side of the positioning seat (9), and the three-hole hollow nail positioning sleeve (7) has three parallel second internal threaded holes, The second internal threaded hole is arranged to be inclined relative to the central axis screw (1), and the three guide sleeves (6) respectively pass through the three second internal threaded holes and are screwed together. The other end of the central axis screw (1) is equipped with an adjuster (10), and the anterior edge positioning sleeve (4) of the lateral femoral condyle and the posterior edge positioning sleeve (5) of the lateral femoral condyle are respectively connected to the adjuster (10), and the adjuster (10) is used to adjust the angular orientation of the anterior edge positioning sleeve (4) of the lateral femoral condyle and the posterior edge positioning sleeve (5). The anterior edge positioning sleeve (4) of the lateral femoral condyle and the posterior edge positioning sleeve (5) of the lateral femoral condyle respectively have a third internal threaded hole perpendicular to the central axis screw (1), and the two second connecting sleeves (8) respectively pass through the two third internal threaded holes in a one-to-one correspondence and are screwed together.

2. An orthopedic positioning guide according to claim 1, Features: The first connecting sleeve (3) comprises a vertical sleeve section inserted into and threadedly connected to the central axis screw rod (1) and an oblique sleeve section arranged obliquely to the vertical sleeve section, wherein the oblique sleeve section is provided with the first internal threaded holes passing through both ends thereof.

3. An orthopedic positioning guide according to claim 2, Features: An included angle α is formed between the axis of the first internal threaded hole and the central axis screw (1), and 130°<α<140°.

4. An orthopedic positioning guide according to claim 1, Features: 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 first locking member, the second connecting sleeves (8) are all T-shaped sleeves, the vertical sleeves of the two second connecting sleeves (8) 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 second connecting sleeves (8), and are respectively locked or separated from the vertical sleeves of the second connecting sleeves (8) by a second locking member, and the third internal threaded hole is provided in the horizontal sleeves of the two second connecting sleeves (8).

5. An orthopedic positioning guide according to claim 4, Features: The inner wall of the vertical sleeve of the second connecting sleeve (8) is provided with an internal thread, and the lower end of the vertical sleeve of the second connecting sleeve (8) is threadedly mounted with a first butterfly knob (103) for contacting or separating with the end of the adjusting rod (101), and the first butterfly knob (103) constitutes the second locking member, and one end of the through hole of the adjusting rod (101) is provided with a sleeve portion sleeved outside the central axis screw (1), and the side wall of the sleeve portion is threadedly connected with a third butterfly knob, and the third butterfly knob is used to be screwed until it contacts or separates with the central axis screw (1).

6. An orthopedic positioning guide according to claim 4, Features: The adjusting rod (101) is provided with scales along its length direction.

7. An orthopedic positioning guide according to claim 1, Features: The positioning seat (9) includes a seat body (91) and a connecting head (92), wherein the connecting head (92) is arranged on one side of the seat body (91), and the connecting head (92) is provided with a channel for the central axis screw (1) to pass through, and the side end of the connecting head (92) is provided with a fourth threaded hole perpendicular to the channel, and a second butterfly knob (921) is screwed into the fourth threaded hole, and the second butterfly knob (921) is used to be screwed to abut against or separate from the central axis screw (1), and the other side of the seat body (91) is provided with a slideway parallel to the second internal threaded hole, and the three-hole hollow nail positioning sleeve (7) is provided with a slide groove on one side, and is slidably connected to the slideway through the slide groove.

8. An orthopedic positioning guide according to claim 7, Features: A position limiting block (922) is provided on the other side of the seat body (91) corresponding to one end of the slideway, and the three-hole hollow nail positioning sleeve (7) can slide along the slideway from one end of the slideway to the other end and abut against the position limiting block (922), or slide out from one end of the slideway.

9. An orthopedic positioning guide according to claim 1, Features: The three second internal threaded holes are arranged in a finished shape of a letter "G".

10. An orthopedic positioning guide according to claim 1, Features: The two third internal threaded holes are distributed at an angle.

Images