A prying and reduction device for intertrochanteric / subtrochanteric fractures

Abstract

The present invention provides a prying and resetting device for intertrochanteric / subtrochanteric fractures of the femur, comprising a first fixed arm, a second fixed arm, a movable seat, an adjusting member, a connecting central axis, an adjusting locking structure and a prying and resetting structure. When in use, the first fixing member and the second fixing member are respectively fixed to the distal femur and the anterior superior iliac spine of the patient; after the fixation is completed, the movable seat is adjusted to move the prying hook to the fractured part, and the prying hook is further fine-tuned until the prying hook holds the fractured part; the prying and resetting structure is operated so that the prying hook lifts the fractured part upward until the fracture end is satisfactorily relocated; when the prying and resetting is satisfactory, the connecting central axis and the prying and resetting structure are locked by adjusting the locking structure. In the process of resetting the fractured part, the lifting operation can be flexibly adjusted according to the specific position and angle of the fracture, and when the fractured part reaches an ideal resetting state under the action of the prying and resetting hook, the state can be maintained for subsequent radiographic examination or fixation.

Description

Technical Field

[0001] The invention relates to the technical field of orthopedic medical instruments, and in particular to a prying and resetting device for intertrochanteric / subtrochanteric fractures of the femur. Background Art

[0002] Intertrochanteric / subtrochanteric fractures, also known as intertrochanteric / subtrochanteric fractures, refer to fractures that occur from the base of the femoral neck to the level above the lesser trochanter. As the aging of the population in my country continues to deepen, the incidence of hip fractures has increased year by year.

[0003] Intertrochanteric / subtrochanteric fractures of the femur are common hip fractures in the clinic. When an intertrochanteric / subtrochanteric fracture occurs, the fracture ends are significantly displaced due to the traction of the surrounding muscles. The displaced fracture parts need to be reduced before internal fixation. However, closed reduction of irreducible intertrochanteric / subtrochanteric fractures is difficult. It is a type of fracture with a special injury type. It is usually necessary to temporarily fix the fracture ends with the help of reduction forceps or periosteal strippers to facilitate further internal fixation. When using reduction forceps or periosteal strippers, an assistant must hold them during the operation and apply a prying force to the bone blocks for reduction. This consumes a lot of physical energy, and the applied force is unstable, which affects the reduction of the fracture ends during the operation. The assistant also needs to wear a heavy lead suit and is forced to be exposed to X-ray radiation.

[0004] Therefore, how to design a prying and reduction device for intertrochanteric / subtrochanteric fractures, which can pry and reduce the fracture ends while stably and effectively maintaining the displaced fracture ends, and does not require an assistant to wear a lead suit and hold the fracture ends with hands during X-ray examination during surgery, is a technical problem that has not been solved in the prior art. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects in the prior art that when performing the reduction operation of intertrochanteric / subtrochanteric fractures of the femur, an assistant is required to use reduction forceps or periosteal strippers to continuously apply prying and reduction force to the fracture ends, and this force also needs to be maintained during X-ray examination, which not only consumes a lot of physical energy but also endangers the health of the doctor. The present invention thus provides a prying and reduction device for intertrochanteric / subtrochanteric fractures of the femur that can stably and effectively hold and fix the displaced fracture part without the need for an assistant to wear a lead suit and hold it with his hands.

[0006] To this end, the present invention provides a prying and resetting device for intertrochanteric / subtrochanteric fractures of the femur, comprising:

[0007] A first fixing arm has a mounting cavity, the mounting cavity is opened from one end of the first fixing arm, and a first fixing piece is arranged at the other end of the first fixing arm, the first fixing piece is suitable for being fixed to the distal end of the femur of the affected limb;

[0008] A second fixing arm, one end of which is telescopically fixedly installed in the installation cavity, and the other end of which is fixedly connected to a second fixing member, wherein the second fixing member is suitable for being fixedly connected to the anterior superior iliac spine of the patient;

[0009] A movable seat, movably mounted on the first fixed arm or the second fixed arm, with at least four mounting posts fixedly arranged on one outer wall;

[0010] There are two adjusting members, which are movably sleeved on a pair of the mounting posts arranged up and down;

[0011] A connecting middle shaft is rotatably mounted between the two adjusting members;

[0012] An adjustment locking structure, used to lock the two adjustment members on the mounting column and lock the connecting center axis to prevent rotation;

[0013] The prying structure is installed on the connecting center axis, can rotate with the connecting center axis, and can move up and down relative to the connecting center axis, and a prying hook is installed at the bottom.

[0014] As a preferred embodiment, the adjusting member includes a first adjusting member and a second adjusting member; a first bearing mounting cavity is opened on the inner wall of the first adjusting member; a second bearing mounting cavity is opened on the inner wall of the second adjusting member; the connecting central axis is rotatably installed between the two adjusting members through rotating bearings respectively installed in the first bearing mounting cavity and the second bearing mounting cavity.

[0015] As a preferred solution, the adjustment locking structure includes:

[0016] A first adjustment hole is provided on the first adjustment member, communicated with the first bearing installation cavity, and opposite to one end of the connecting central shaft;

[0017] An adjusting bolt, passing through the first adjusting hole and fixedly connected to one end of the connecting center shaft;

[0018] A second adjustment hole is provided on the second adjustment member coaxially and opposite to the first adjustment hole, communicated with the second bearing installation cavity, and used for the other end of the connecting center shaft with an external thread to pass outward;

[0019] A ratchet ring is formed on the inner wall of the second adjusting hole facing outward, with the ratchet teeth facing outward;

[0020] A ratchet gear, which is threadedly sleeved on the other end of the connecting middle shaft and can be mated with the ratchet ring;

[0021] A long limiting through hole is provided on the other end of the connecting central axis;

[0022] A limiting shaft is passed through the elongated limiting through hole and is fixedly installed inside the ratchet gear;

[0023] A return spring, sleeved on the connecting middle shaft and located between the rotating bearing and the limiting shaft;

[0024] A driving nut is threadably sleeved on the connecting central shaft and is located outside the ratchet gear.

[0025] As a preferred solution, a receiving groove is provided on the inner side surface of the ratchet gear, and the limiting shaft is fixedly installed in the receiving groove.

[0026] As a preferred solution, the prying structure includes a prying rod and a prying hook arranged at the bottom end of the prying rod, the outer wall of the prying rod is provided with an external thread, and is installed on the connecting central axis through a prying installation structure.

[0027] As a preferred solution, the prying installation structure includes:

[0028] A pry rod installation through hole is provided on the connecting center axis;

[0029] A mounting plane is arranged on the connecting center axis, and the mounting through hole of the pry rod is located in the middle of the mounting plane;

[0030] An internal threaded sleeve, which is threadedly sleeved on the prying rod, and a ring-shaped rotating disk is fixedly arranged at the bottom through a connecting tube;

[0031] A pry mounting plate is fixedly mounted on the mounting plane and has a mounting plate through hole opposite to the pry rod mounting through hole; a section of the mounting plate through hole is expanded outward toward the mounting plane, and together with the mounting plane forms a turntable mounting space; the connecting tube is rotatably penetrated at the position of the mounting plate through hole, and the outer diameter of the annular turntable is larger than the inner diameter of the mounting plate through hole.

[0032] As a preferred solution, the prying mounting plate is formed by two pieces butted together;

[0033] And / or, the pry mounting plate is fixedly mounted on the mounting plane by bolts.

[0034] As a preferred solution, the pry hook is installed at the bottom of the pry rod through a movable connection structure; the movable connection structure includes:

[0035] A prying connector, one end of which is formed with a hemispherical mounting cavity, and the other end of which is provided with a connecting hole communicating with the hemispherical mounting cavity;

[0036] A connecting ball, integrally formed at one end of the pry hook, capable of being installed into the hemispherical installation cavity;

[0037] A pry connection cap, one end of which is fixedly sleeved on one end of the pry connection piece provided with the hemispherical mounting cavity, and the other end of which is provided with a cap hole for the pry hook to extend out;

[0038] A locking bolt is installed at the connection hole and is used to press the connection ball to limit and lock the connection ball;

[0039] The locking rotating rod is arranged at the operating end of the locking bolt.

[0040] As a preferred solution, the first fixing arm includes a first horizontal arm and a first vertical arm fixedly arranged at the other end of the first horizontal arm; the first fixing member is fixedly connected to the free end of the first vertical arm, and includes two arc-shaped clamping plates arranged opposite to each other, and first fixing through holes are relatively opened at the bottom connecting positions of the two arc-shaped clamping plates, and first bolt assemblies are detachably installed on the two first fixing through holes; two Kirschner wire passing holes are relatively opened at the middle parts of the two arc-shaped clamping plates;

[0041] And / or, the second fixed arm includes a second horizontal arm, and a second vertical arm fixedly arranged at the other end of the second horizontal arm; the second fixing member is fixedly connected to the free end of the second vertical arm, and includes two oppositely arranged fixing clamps, and second fixing through holes are oppositely opened on the two fixing clamps, and second bolt assemblies are detachably installed on the two second fixing through holes.

[0042] As a preferred solution, a first threaded through hole is formed on the movable seat, and a first locking bolt passes through the first threaded through hole to fix the movable seat on the first fixed arm or the second fixed arm;

[0043] And / or, a second threaded through hole is formed on the first fixing arm, and a second locking bolt passes through the second threaded through hole to fix the second fixing arm to the first fixing arm.

[0044] The technical solution provided by the present invention has the following advantages:

[0045] The present invention discloses a poking reduction device for intertrochanteric / subtrochanteric fractures, comprising a first fixed arm, a second fixed arm, a movable seat, an adjusting member, a connecting middle shaft, an adjusting locking structure and a poking structure; wherein the first fixed arm has a mounting cavity, the mounting cavity is opened from one end of the first fixed arm, and the other end of the first fixed arm is provided with a first fixing member, the first fixing member is suitable for being fixed to the distal end of the femur of the affected limb; one end of the second fixed arm is telescopically fixedly mounted in the mounting cavity, and the other end is fixedly connected with a second fixing member, the second fixing member is suitable for being fixedly connected to the anterior superior iliac spine of the patient; the movable seat is movably sleeved on the first fixed arm or the second fixed arm, and at least four mounting posts are fixedly arranged on one side outer wall; there are two adjusting members, which are movably sleeved on a pair of mounting posts arranged up and down respectively; the connecting middle shaft is movably mounted between the two adjusting members; the adjusting locking structure is used for locking the two adjusting members on the mounting posts, and locking the connecting middle shaft to be unable to rotate; the poking structure is installed on the connecting middle shaft, can rotate with the connecting middle shaft, and can move up and down relative to the connecting middle shaft, and a poking hook is installed at the bottom.

[0046] When performing fracture reduction on patients with intertrochanteric / subtrochanteric fractures, first adjust the distance between the first fixing arm and the second fixing arm according to the specific situation of the patient, so that the first fixing member and the second fixing member can be fixed to the distal end of the femur and the anterior superior iliac spine of the patient respectively; after fixation, adjust the movable seat to move the prying hook to the fractured part, and move the adjusting member and rotate the connecting middle axis to further fine-tune the position of the prying hook until the prying hook supports the fractured part; operate the prying structure so that the prying hook can reduce the fracture end, and when the fractured part reaches the ideal reduction state under the action of the prying hook, adjust the locking structure to lock the connecting middle axis and the prying structure to keep them in the above state for subsequent radiographic examination or surgical fixation.

[0047] The prying and resetting device for intertrochanteric / subtrochanteric fractures of the present invention can flexibly adjust the prying operation according to the specific position and angle of the fracture during the resetting of the fracture part. When the fracture part reaches an ideal resetting state under the action of the prying hook, the state can be maintained for subsequent radiographic examination or fixation. After using the prying and resetting device of the present invention, it is no longer necessary for an assistant to use a resetting forceps or a periosteal stripper to continuously apply a prying and resetting force to the fracture end, thereby saving more labor, and no doctor is required to be present during the radiographic examination, thereby avoiding the adverse effects of radiation on the doctor's health. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the prior art or the specific implementation manner of the present invention, the drawings used in the description of the prior art or the specific implementation manner are briefly introduced below.

[0049] Figure 1It is a schematic diagram of the overall structure of the prying and resetting device for intertrochanteric / subtrochanteric fractures of the present invention.

[0050] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0051] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure of part B.

[0052] Figure 4 Yes Figure 1 Schematic diagram of the structure after the explosion of the adjusting locking structure and the prying structure.

[0053] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of part C.

[0054] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of part D.

[0055] Figure 7 yes Figure 4 Schematic diagram of the enlarged structure of part E.

[0056] Figure 8 yes Figure 4 Another stereoscopic view of .

[0057] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure of part F.

[0058] Fig.10 yes Figure 8 Schematic diagram of the structure after the explosion of the middle prying structure.

[0059] Fig.11 yes Figure 1 Schematic diagram of the structure after the middle pry lever and the internal threaded sleeve are assembled.

[0060] Fig.12 yes Figure 1 Schematic diagram of the structure of the middle ratchet gear.

[0061] Figure numerals: 1, first fixed arm; 12, first fixing member; 13, first horizontal arm; 14, first vertical arm; 15, arc-shaped clamp; 16, first fixed through hole; 17, first bolt assembly; 18, Kirschner wire through hole; 2, second fixed arm; 21, second fixing member; 22, second horizontal arm; 23, second vertical arm; 24, fixed clamp; 25, second fixed through hole; 26, second bolt assembly; 3, moving seat; 31, mounting column; 32, prying hook; 33, prying rod mounting through hole; 34, mounting plane; 35, internal threaded sleeve; 36, connecting cylinder; 37, annular turntable; 38, prying mounting plate; 39, mounting plate through hole; 40, turntable mounting space; 4, connecting central axis; 41, Adjusting member; 411, first adjusting member; 412, second adjusting member; 413, first bearing mounting cavity; 414, second bearing mounting cavity; 42, first adjusting hole; 43, rotating bearing; 44, second adjusting hole; 45, adjusting bolt; 46, ratchet ring; 47, ratchet gear; 48, long limit through hole; 49, limit shaft; 5, reset spring; 51, drive nut; 52, accommodating groove; 6, pry connecting member; 61, hemispherical mounting cavity; 62, connecting hole; 63, connecting ball; 64, pry connecting cap; 65, cap hole; 66, locking bolt; 67, locking rotating rod; 7, first threaded through hole; 71, first locking bolt; 72, second threaded through hole; 73, second locking bolt; 8, pry rod. DETAILED DESCRIPTION

[0062] In order to make those skilled in the art better understand the present solution, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0063] It should be noted that the terms "first", "second", etc. in the claims and description of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not limited to those steps or units clearly listed, but may also include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0064] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

[0065] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. Example

[0066] This embodiment provides a prying and reduction device for intertrochanteric / subtrochanteric fractures of the femur, such as Figure 1-7 As shown, it includes: a first fixed arm 1, a second fixed arm 2, a movable seat 3, an adjusting member 41, a connecting central axis 4, an adjusting locking structure and a prying structure;

[0067] Among them, the first fixed arm 1 has an installation cavity, which is opened from one end of the first fixed arm 1, and the other end of the first fixed arm 1 is provided with a first fixing member 12, and the first fixing member 12 is suitable for being fixed to the distal end of the femur of the affected limb; one end of the second fixed arm 2 is telescopically fixedly installed in the installation cavity, and the other end is fixedly connected to the second fixing member 21, and the second fixing member 21 is suitable for being fixedly connected to the patient's anterior superior iliac spine; the movable seat 3 is movably mounted on the first fixed arm 1 or the second fixed arm 2, and at least four mounting columns 31 are fixedly arranged on one side of the outer wall; there are two adjusting members 41, which are movably mounted on a pair of the mounting columns 31 arranged up and down respectively; the connecting central axis 4 is rotatably installed between the two adjusting members 41; the adjusting locking structure is used to lock the two adjusting members 41 on the mounting columns 31, and lock the connecting central axis 4 to be unable to rotate; the prying structure is installed on the connecting central axis 4, can rotate with the connecting central axis 4, and can move up and down relative to the connecting central axis 4, and a prying hook 32 is installed at the bottom.

[0068] When performing fracture reduction on patients with intertrochanteric / subtrochanteric fractures, first adjust the distance between the first fixing arm 1 and the second fixing arm 2 according to the specific situation of the patient, so that the first fixing member 12 and the second fixing member 21 can be fixed to the distal end of the femur and the anterior superior iliac spine of the patient respectively; after fixation, adjust the movable seat 3 to move the prying hook 32 to the fractured part, and move the adjusting member 41 and the rotating connecting central axis 4 to further fine-tune the position of the prying hook 32 until the prying hook 32 hooks and supports the displaced part of the fracture; operate the prying structure so that the prying hook 32 lifts the displaced part of the fracture end upwards until the fracture end is satisfactorily reduced; when the fractured part reaches the ideal reduction state under the prying action of the prying hook 32, the connecting central axis 4 and the prying structure are locked by adjusting the locking structure to keep them in the above state for subsequent radiographic examination or surgical fixation.

[0069] The prying and reduction device for intertrochanteric / subtrochanteric fractures of the present embodiment can flexibly adjust the prying operation according to the specific position and angle of the fracture during the reduction of the fractured part. When the fracture ends reach an ideal reduction state under the action of the prying hook, they can be kept in the above state for subsequent radiographic examination or fixation. After using the prying and reduction device of the present embodiment, there is no need for an assistant to use reduction forceps or periosteal strippers to continuously apply prying and reduction force to the fracture ends, thus saving more effort. A doctor does not need to be present during the radiographic examination, thus avoiding the adverse effects of radiation on the doctor's health.

[0070] The adjusting member 41 includes a first adjusting member 411 and a second adjusting member 412; a first bearing installation cavity 413 is formed on the inner wall of the first adjusting member 411; a second bearing installation cavity 414 is formed on the inner wall of the second adjusting member 412; the connecting central axis 4 is rotatably installed between the two adjusting members 41 through rotating bearings 43 respectively installed in the first bearing installation cavity 413 and the second bearing installation cavity 414. The connecting central axis 4 is rotatably installed on the adjusting member 41 through the rotating bearings 43, and the prying structure is installed on the connecting central axis 4, so that the prying hook 32 can be flexibly adjusted in position and angle.

[0071] like Figure 5 , Figure 6 , Figure 8 and Fig. 9As shown, the adjustment locking structure includes: a first adjustment hole 42, an adjustment bolt 45, a second adjustment hole 44, a ratchet ring 46, a ratchet gear 47, a long limit through hole 48, a limit shaft 49, a reset spring 5 and a drive nut 51; wherein the first adjustment hole 42 is provided on the first adjustment member 411, is communicated with the first bearing mounting cavity 413, and is opposite to one end of the connecting central axis 4; the adjustment bolt 45 passes through the first adjustment hole 42 and is fixedly connected to one end of the connecting central axis 4; the second adjustment hole 44 is coaxially opposite to the first adjustment hole 42 and is provided on the second adjustment member 412, is communicated with the second bearing mounting cavity 414, and is used for the connecting The other end of the connecting center axis 4 with an external thread protrudes outward; the ratchet ring 46 is formed on the inner wall of the outward side of the second adjusting hole 44, and the ratchet is arranged outward; the ratchet gear 47 is threadedly sleeved on the other end of the connecting center axis 4, and can cooperate with the ratchet ring 46; the long limiting through hole 48 is opened on the other end of the connecting center axis 4; the limiting shaft 49 is penetrated inside the long limiting through hole 48 and fixedly installed inside the ratchet gear 47; the reset spring 5 is sleeved on the connecting center axis 4, and is located between the rotating bearing 43 and the limiting shaft 49; the drive nut 51 is threadedly sleeved on the connecting center axis 4, and is located on the outside of the ratchet gear 47.

[0072] When it is necessary to lock the connecting central axis 4 and the adjusting member 41, the driving nut 51 is rotated inward, and the driving nut 51 pushes the ratchet gear 47 and the limit shaft 49 to move inward to squeeze the reset spring 5. When the ratchet gear 47 is pushed to dock with the ratchet ring 46, the connecting central axis 4 is locked and cannot rotate; when the driving nut 51 continues to be rotated inward, the driving nut 51 pulls the connecting central axis 4 to move outward and makes the second adjusting member 412 move inward relative to the connecting central axis 4, thereby changing the distance between the first adjusting member 411 and the second adjusting member 412, so that the first adjusting member 411 and the second adjusting member 412 squeeze the mounting column 31, thereby locking the adjusting member 41 on the mounting column 31. When it is necessary to release the lock on the connecting central axis 4 and the adjusting member 41, the driving nut 51 is rotated outward, and the distance between the first adjusting member 411 and the second adjusting member 412 is restored to the initial distance, and the first adjusting member 411 and the second adjusting member 412 no longer squeeze the mounting column 31, and the lock of the adjusting member 41 on the mounting column 31 can be released; the driving nut 51 is continued to be rotated outward, and the reset spring 5 continues to squeeze the limit shaft 49 outward, so that the ratchet gear 47 continues to move with the movement of the driving nut 51, and when the ratchet gear 47 is no longer connected to the ratchet ring 46, the lock of the connecting central axis 4 is released, and the connecting central axis 4 can resume free rotation.

[0073] like Fig.12As shown, a receiving groove 52 is provided on the inner side surface of the ratchet gear 47, and the limiting shaft 49 is fixedly installed in the receiving groove 52. After the limiting shaft 49 is installed in the receiving groove 52, it basically does not protrude from the receiving groove 52, so when the ratchet gear 47 and the ratchet ring 46 are connected, the limiting shaft 49 will not constitute an obstacle.

[0074] like Figure 7 As shown, the prying structure includes a prying rod 8 and a prying hook 32 arranged at the bottom end of the prying rod 8. The outer wall of the prying rod 8 is provided with an external thread and is installed on the connecting central axis 4 through a prying installation structure.

[0075] like Figure 8 , 9 As shown in Figures 1 and 11, the prying mounting structure includes: a prying rod mounting through hole 33, a mounting plane 34, an internally threaded sleeve 35, and a prying mounting plate 38; wherein the prying rod mounting through hole 33 is opened on the connecting central axis 4; the mounting plane 34 is arranged on the connecting central axis 4, and the prying rod mounting through hole 33 is located in the middle position of the mounting plane 34; the internally threaded sleeve 35 is threadedly sleeved on the prying rod 8, and an annular turntable 37 is fixedly provided at the bottom through a connecting tube 36; the prying mounting plate 38 is fixedly installed on the mounting plane 34, and has a mounting plate through hole 39 opposite to the prying rod mounting through hole 33; a section of the mounting plate through hole 39 is expanded outward toward the mounting plane 34, and together with the mounting plane 34 forms a turntable mounting space 40; the connecting tube 36 is rotatably penetrated at the position of the mounting plate through hole 39, and the outer diameter of the annular turntable 37 is larger than the inner diameter of the mounting plate through hole 39. The internal threaded sleeve 35 is relatively fixedly rotatably mounted on the connecting central axis 4 through the prying mounting plate 38, and is threadedly sleeved on the prying rod 8. When it is necessary to adjust the height of the prying hook 32, the prying rod 8 is held by hand and the internal threaded sleeve 35 is rotated to adjust the height of the prying hook 32. After the rotation of the internal threaded sleeve 35 is stopped, under the pulling force of the bone to be repositioned, the internal threaded sleeve 35 is relatively fixed to the connecting central axis 4, thereby being able to automatically maintain the adjusted height of the prying hook 32.

[0076] The pry mounting plate 38 is formed by two butted pieces; the pry mounting plate 38 is fixedly mounted on the mounting plane 34 by means of bolts.

[0077] like Figure 7 and 10As shown, the pry hook 32 is installed at the bottom of the pry rod 8 through a movable connection structure; the movable connection structure includes: a pry connector 6, a connecting ball 63, a pry connector cap 64, a locking bolt 66 and a locking rotating rod 67; wherein, a hemispherical mounting cavity 61 is formed at one end of the pry connector 6, and a connecting hole 62 connected to the hemispherical mounting cavity 61 is opened at the other end; the connecting ball 63 is integrally formed at one end of the pry hook 32 and can be installed into the hemispherical mounting cavity 61; one end of the pry connector cap 64 is fixedly sleeved on one end of the pry connector 6 with the hemispherical mounting cavity 61, and the other end is opened with a cap hole 65 for the pry hook 32 to extend out; the locking bolt 66 is installed at the position of the connecting hole 62, and is used to press the connecting ball 63 to limit and lock the connecting ball 63; the locking rotating rod 67 is arranged at the operating end of the locking bolt 66. When the angle of the prying hook 32 needs to be adjusted, the prying hook 32 is rotated, and the prying hook 32 can rotate in the hemispherical installation cavity 61 through the connecting ball 63 on one end.

[0078] Furthermore, the cap hole 65 has a certain length, so that the prying hook 32 can only rotate within a certain range.

[0079] like Figure 1 As shown, the first fixed arm 1 includes a first horizontal arm 13, and a first vertical arm 14 fixedly arranged at the other end of the first horizontal arm 13; the first fixing member 12 is fixedly connected to the free end of the first vertical arm 14, and includes two oppositely arranged arc-shaped splints 15, and the bottom connecting positions of the two arc-shaped splints 15 are oppositely provided with first fixing through holes 16, and the first bolt assemblies 17 are detachably installed on the two first fixing through holes 16; two Kirschner wire through holes 18 are oppositely opened in the middle parts of the two arc-shaped splints 15; the second fixed arm 2 includes a second horizontal arm 22, and a second vertical arm 23 fixedly arranged at the other end of the second horizontal arm 22; the second fixing member 21 is fixedly connected to the free end of the second vertical arm 23, and includes two oppositely arranged fixing splints 24, and the two fixing splints 24 are oppositely provided with second fixing through holes 25, and the second bolt assemblies 26 are detachably installed on the two second fixing through holes 25. The first fixing member 12 can be fixed to the distal end of the femur of the patient through the first bolt assembly 17 , and the K-wire can be inserted into the patient's bone through the K-wire hole 18 ; the second fixing member 21 can be fixed to the anterior superior iliac spine of the patient through the second bolt assembly 26 .

[0080] The movable seat 3 is provided with a first threaded through hole 7, and the movable seat 3 is fixed to the first fixed arm 1 or the second fixed arm 2 by passing through the first threaded through hole 7 with a first locking bolt 71; the first fixed arm 1 is provided with a second threaded through hole 72, and the second fixed arm 2 is fixedly connected to the first fixed arm 1 by passing through the second threaded through hole 72 with a second locking bolt 73.

[0081] The prying and resetting device for intertrochanteric / subtrochanteric fractures in this embodiment is used as follows: when resetting a patient with intertrochanteric / subtrochanteric fracture, first adjust the distance between the first fixing arm 1 and the second fixing arm 2 according to the patient's specific situation, so that the first fixing member 12 and the second fixing member 21 can be fixed to the patient's distal femur and anterior superior iliac spine, respectively; after fixation, adjust the movable seat 3 to move the prying hook 32 to the fractured part, and move the adjusting member 41 and the rotating connecting middle shaft 4 to further fine-tune the position of the prying hook 32 until the prying hook 32 hooks and supports the displaced part of the fracture; when it is necessary to adjust the height of the prying hook 32, hold the prying rod 8 by hand, rotate the internal threaded sleeve 35 to adjust the height of the prying hook 32, and after stopping rotating the internal threaded sleeve 35, under the pulling force of the bone to be relocated, the internal threaded sleeve 35 is rotated. The threaded sleeve 35 is relatively fixed to the connecting central axis 4, so that it can automatically maintain the height of the prying hook 32 that has been adjusted; when the fractured part reaches the ideal reset state under the upper supporting action of the prying hook 32, the drive nut 51 is rotated inward, and the drive nut 51 pushes the ratchet gear 47 and the limit shaft 49 to move inward to squeeze the reset spring 5. When the ratchet gear 47 is pushed to dock with the ratchet ring 46, the connecting central axis 4 is locked and cannot rotate; when the drive nut 51 continues to be rotated inward, the drive nut 51 pulls the connecting central axis 4 to move outward, and makes the second adjusting member 412 move inward relative to the connecting central axis 4, thereby changing the distance between the first adjusting member 411 and the second adjusting member 412, so that the first adjusting member 411 and the second adjusting member 412 squeeze the mounting column 31, and then locks the adjusting member 41 on the mounting column 31. When the fractured part is fixed and the lock on the connecting central axis 4 and the adjusting member 41 needs to be released, the driving nut 51 is rotated outward, and the distance between the first adjusting member 411 and the second adjusting member 412 is restored to the initial distance, and the first adjusting member 411 and the second adjusting member 412 no longer squeeze the mounting column 31, and the lock on the adjusting member 41 on the mounting column 31 can be released at this time; the driving nut 51 is continued to be rotated outward, and the reset spring 5 continues to squeeze the limiting shaft 49 outward, so that the ratchet gear 47 continues to move with the movement of the driving nut 51, and when the ratchet gear 47 is no longer docked with the ratchet ring 46, the lock on the connecting central axis 4 is released, and the connecting central axis 4 can resume free rotation.

[0082] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of this innovative technical solution.

Claims

1. A prying and resetting device for intertrochanteric / subtrochanteric fractures of the femur, characterized in that: include: A first fixing arm (1) having a mounting cavity, the mounting cavity opening from one end of the first fixing arm (1), the other end of the first fixing arm (1) being provided with a first fixing member (12), the first fixing member (12) being suitable for fixing to the distal end of the femur of the affected limb; A second fixing arm (2), one end of which is telescopically fixedly mounted in the mounting cavity, and the other end of which is fixedly connected to a second fixing member (21), wherein the second fixing member (21) is suitable for being fixedly connected to the anterior superior iliac spine of a patient; A movable seat (3) is movably mounted on the first fixed arm (1) or the second fixed arm (2), and at least four mounting columns (31) are fixedly arranged on one outer wall; There are two adjusting members (41), which are movably sleeved on a pair of mounting columns (31) arranged vertically; A connecting middle shaft (4) rotatably mounted between the two adjusting members (41); An adjustment locking structure, used for locking the two adjustment members (41) on the mounting column (31), and locking the connecting central axis (4) to prevent rotation; The prying structure is mounted on the connecting middle axis (4), can rotate along with the connecting middle axis (4), and can move up and down relative to the connecting middle axis (4), and a prying hook (32) is mounted on the bottom.

2. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 1, characterized in that: The adjusting member (41) comprises a first adjusting member (411) and a second adjusting member (412); a first bearing installation cavity (413) is provided on an inner wall of the first adjusting member (411); a second bearing installation cavity (414) is provided on an inner wall of the second adjusting member (412); and the connecting central shaft (4) is rotatably mounted between the two adjusting members (41) via a rotating bearing (43) respectively mounted in the first bearing installation cavity (413) and the second bearing installation cavity (414).

3. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 2, characterized in that: The adjustment locking structure comprises: A first adjustment hole (42) is formed on the first adjustment member (411), is communicated with the first bearing installation cavity (413), and is opposite to one end of the connecting central shaft (4); An adjusting bolt (45) passes through the first adjusting hole (42) and is fixedly connected to one end of the connecting center shaft (4); A second adjustment hole (44) is provided on the second adjustment member (412) coaxially with the first adjustment hole (42) and communicates with the second bearing mounting cavity (414) for allowing the other end of the connecting center shaft (4) provided with an external thread to pass outwards; A ratchet ring (46) formed on the inner wall of the second adjustment hole (44) facing outward, with the ratchet teeth facing outward; A ratchet gear (47) is threadedly sleeved on the other end of the connecting middle shaft (4) and can be mated with the ratchet ring (46); A long limiting through hole (48) is provided on the other end of the connecting central axis (4); A limiting shaft (49) is passed through the long limiting through hole (48) and is fixedly mounted inside the ratchet gear (47); A return spring (5) is sleeved on the connecting middle shaft (4) and is located between the rotating bearing (43) and the limiting shaft (49); A drive nut (51) is threadably sleeved on the connecting central shaft (4) and is located outside the ratchet gear (47).

4. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 3, characterized in that: An accommodating groove (52) is provided on the inner side surface of the ratchet gear (47), and the limiting shaft (49) is fixedly mounted in the accommodating groove (52).

5. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 1, characterized in that: The prying structure comprises a prying rod (8) and a prying hook (32) arranged at the bottom end of the prying rod (8); an external thread is arranged on the outer wall of the prying rod (8) and is mounted on the connecting central shaft (4) via the prying mounting structure.

6. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 5, characterized in that: The prying installation structure comprises: A pry rod mounting through hole (33) is provided on the connecting center shaft (4); A mounting plane (34) is arranged on the connecting center axis (4), and the pry rod mounting through hole (33) is located in the middle of the mounting plane (34); An internal threaded sleeve (35) is threadedly sleeved on the prying rod (8), and an annular rotating disk (37) is fixedly provided at the bottom via a connecting tube (36); A pry mounting plate (38) is fixedly mounted on the mounting plane (34) and has a mounting plate through hole (39) opposite to the pry rod mounting through hole (33); a section of the mounting plate through hole (39) is expanded outward toward the mounting plane (34) to form a turntable mounting space (40) together with the mounting plane (34); the connecting tube (36) is rotatably inserted into the mounting plate through hole (39); and the outer diameter of the annular turntable (37) is larger than the inner diameter of the mounting plate through hole (39).

7. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 6, characterized in that: The prying mounting plate (38) is formed by two pieces butted together; And / or, the pry mounting plate (38) is fixedly mounted on the mounting plane (34) by means of bolts.

8. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 5, characterized in that: The prying hook (32) is installed at the bottom of the prying rod (8) via a movable connection structure; The active connection structure comprises: A prying connection piece (6), one end of which is formed with a hemispherical mounting cavity (61), and the other end of which is provided with a connecting hole (62) communicating with the hemispherical mounting cavity (61); A connecting ball (63) is integrally formed at one end of the prying hook (32) and can be installed into the hemispherical installation cavity (61); A prying connection cap (64), one end of which is fixedly sleeved on one end of the prying connection piece (6) provided with the hemispherical mounting cavity (61), and the other end of which is provided with a cap hole (65) for the prying hook (32) to extend out; A locking bolt (66) is installed at the connection hole (62) and is used to press against the connection ball (63) to limit and lock the connection ball (63); A locking rotating rod (67) is arranged at the operating end of the locking bolt (66).

9. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 1, characterized in that: The first fixing arm (1) comprises a first horizontal arm (13), and a first vertical arm (14) fixedly arranged at the other end of the first horizontal arm (13); the first fixing member (12) is fixedly connected to the free end of the first vertical arm (14), and comprises two arc-shaped clamping plates (15) arranged opposite to each other, first fixing through holes (16) being oppositely opened at the bottom connecting positions of the two arc-shaped clamping plates (15), and first bolt assemblies (17) being detachably mounted on the two first fixing through holes (16); two Kirschner wire passing holes (18) are oppositely opened at the middle parts of the two arc-shaped clamping plates (15); And / or, the second fixing arm (2) comprises a second horizontal arm (22), and a second vertical arm (23) fixedly arranged at the other end of the second horizontal arm (22); the second fixing member (21) is fixedly connected to the free end of the second vertical arm (23), and comprises two fixing clamps (24) arranged opposite to each other, the two fixing clamps (24) are provided with second fixing through holes (25) opposite to each other, and second bolt assemblies (26) are detachably mounted on the two second fixing through holes (25).

10. The prying and resetting device for intertrochanteric / subtrochanteric fractures according to claim 1, characterized in that: The movable seat (3) is provided with a first threaded through hole (7), and the movable seat (3) is fixed to the first fixed arm (1) or the second fixed arm (2) by passing a first locking bolt (71) through the first threaded through hole (7); And / or, a second threaded through hole (72) is formed on the first fixing arm (1), and a second locking bolt (73) passes through the second threaded through hole (72) to fix the second fixing arm (2) to the first fixing arm (1).

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