Femoral greater trochanter fixator

Abstract

The utility model relates to the technical field of medical instruments, in particular to a thighbone greater trochanter fixator which comprises an embracing device and a fixing plate detachably arranged on one side of the embracing device. Wherein the fixing plate comprises a claw hook part, an upper fixing plate and a lower fixing plate; the claw hook part comprises two claw hooks fixedly arranged on the two sides of one end of the upper fixing plate respectively and a screw gasket fixedly arranged between the two claw hooks, and a through hole allowing a screw to pass through is formed in the screw gasket in the thickness direction. The claw hook part, the upper fixing plate and the lower fixing plate are matched with the longitudinal radian of the outer side wall of the thighbone greater trochanter; wherein the front and rear arm plates on the fixing plate are customized according to the radian of the outer side wall of the greater trochanter in the front-back direction, the arm plates can be tightly attached to the front and rear bone surfaces, particularly wrap and cover the coronal plane fracture of the rear wall of the greater trochanter, and screws are implanted into screw holes for fixing; and the embracing apparatus and the fixing plate cooperate, so that the reliability of overall fixation is further enhanced, the convenience of the operation is improved, and the operation risk of the patient is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to a femoral greater trochanter fixator. BACKGROUND

[0002] With the advent of an aging society, femoral intertrochanteric fracture is one of the most common hip fractures, accounting for about 35.7% of hip fractures in China. The prognosis of conservative treatment of this type of fracture is poor, often referred to as "the last fracture of human beings", with a mortality rate of up to 20% one year after injury. This type of fracture has a high failure rate, many complications, low patient satisfaction, and heavy medical burden. Choosing the right internal fixation surgery greatly improves the prognosis of femoral intertrochanteric fracture and speeds up the recovery of patients. Unstable intertrochanteric fracture of the femur is one of the most serious challenges faced by orthopedic surgeons. With in-depth research on this type of fracture, the importance of the lateral wall of the proximal femur is increasingly recognized. Its integrity and effective fixation are closely related to the clinical treatment effect. The complete lateral wall of the proximal femur has the following important effects on the stability of the internal fixation of the femoral intertrochanteric fracture: 1. The complete lateral wall supports the proximal head-neck bone block, allowing the head-neck bone block to slide outward along the sliding axis of the lag screw or head screw, and the head-neck bone block is in close contact with the femoral shaft, which promotes fracture healing; 2. When the bone blocks are tightly embedded and seated, the lateral wall can help resist the rotation and varus tendency of the head-neck bone block; 3. For the proximal femoral head medullary nail, the lateral wall can provide an external point of action for the head screw in the femoral head, reducing the lever stress at the interface between the head screw and the main nail of the intramedullary nail, preventing the screw from moving out and the intramedullary nail from bending and breaking. Therefore, it is necessary to fix and reconstruct the integrity of the lateral wall of the proximal femur to increase the stability of the proximal femoral internal fixation system.

[0003] The cortical entry of the lateral wall of the proximal femur affects the stability of the proximal femoral head medullary nail, although there is no clinical and basic research to confirm this. It is important to note that the coronal plane of the lateral wall entry is still an A2 type fracture as long as it does not involve the anterior wall cortex; if it involves the anterior wall cortex, it becomes an A3 type, with both coronal and sagittal plane swings, which reduces the overall stability and increases the risk of postoperative complications. In closed reduction and head medullary nail internal fixation, the unreduced posterior wall coronal bone block will inevitably affect the overall stability of the nail structure. Currently, some research in clinical practice believes that it needs to be reduced and fixed, such as using minimally invasive ligation methods (steel wire, titanium cable), or open additional plate fixation (small plate, large plate) to fix it. Based on the above understanding, there is an urgent need for a comprehensive implant to provide comprehensive fixation options for femoral proximal lateral wall fractures, whether they involve coronal, sagittal, or horizontal fractures. SUMMARY

[0004] The utility model discloses a femoral greater trochanter fixator which is provided to overcome the defects of the prior art.

[0005] To achieve the above object, the utility model takes the technical scheme that:

[0006] The utility model provides a femoral greater trochanter fixator, include: embrace ware, the fixed plate of detachable type setting in one side of the embrace ware,

[0007] Among them, the fixed plate includes: claw hook part, the upper fixed plate of fixed setting in one end of the claw hook part and the lower fixed plate of fixed setting in the other end of the upper fixed plate,

[0008] The claw hook part includes: two claw hooks fixedly arranged on both sides of one end of the upper fixed plate respectively, and a screw gasket fixedly arranged between the two claw hooks, the screw gasket is provided with a through hole for the screw to pass through along the thickness direction;

[0009] Among them, the two claw hooks are hook claw structures with bending angles, and the tip portions of the two claw hooks are bent downward and towards the middle positions of the claw hooks.

[0010] The two claw hooks, the upper fixed plate and the lower fixed plate are matched with the curvature of the lateral wall of the proximal end of the greater trochanter.

[0011] Further, the embrace ware includes: a first arm plate and a second arm plate.

[0012] Among them, one end of the first arm plate is hingedly connected with one end of the second arm plate, the other end of the first arm plate is fixedly provided with a first bolt fastener, the other end of the second arm plate is fixedly provided with a second bolt fastener, and the first bolt fastener and the second bolt fastener are connected through bolts.

[0013] Among them, a first open slot is formed in the thickness direction of the first arm plate on the side of the first bolt fastener away from the first arm plate, and a second open slot is formed in the thickness direction of the second arm plate on the side of the second bolt fastener away from the second arm plate.

[0014] Among them, the first open slot and the second open slot form a limiting slot after merging, and one end of the lower fixed plate is detachably arranged in the limiting slot.

[0015] Further, the cross sections of the first arm plate and the second arm plate are both arc-shaped plate structures, and the first arm plate, the second arm plate, the first bolt fastener and the second bolt fastener form a surrounding arc structure.

[0016] Further, the upper fixed plate is uniformly provided with 1-6 first threaded holes along the thickness direction of the upper fixed plate, and the lower fixed plate is uniformly provided with 1-6 second threaded holes along the thickness direction of the lower fixed plate.

[0017] Further, the first arm plate is uniformly provided with 2-6 third threaded holes along the thickness direction of the first arm plate, and the second arm plate is uniformly provided with 2-6 third threaded holes along the thickness direction of the second arm plate.

[0018] Further, the upper fixed plate is an arc-shaped plate structure with a bending angle.

[0019] Further, the bending angle of the upper fixed plate is 1° to 45°.

[0020] Further, the thickness of the first arm plate is 1mm-2.5mm, and the thickness of the second arm plate is 1mm-2.5mm.

[0021] The width of the lower fixed plate is 3mm-4mm, the width of the upper fixed plate is greater than the width of the lower fixed plate 13, and the thickness of the upper fixed plate and the lower fixed plate is 1mm-3mm.

[0022] The above technical scheme is adopted, compared with the prior art, and the following technical effects are achieved.

[0023] The upper fixed plate, the lower fixed plate and the claw hook part in the fixed plate are customized according to the arc of the proximal lateral wall of the greater trochanter of the femur, and the fixed plate can be closely attached to the bone surface, so that stable support is provided for the fracture site, and the fracture healing is effectively promoted.

[0024] The arm plate in the steel plate is customized according to the front and rear direction arc of the proximal lateral wall of the greater trochanter of the femur, and the fixed plate can be closely attached to the bone surface, especially for wrapping the greater trochanter posterior wall coronal plane fracture, and fixed by screw hole implantation screw, effectively increasing the stability of the lateral wall to the fracture fixation.

[0025] The utility model still combines the embracing device to give the fracture area more stable embracing force, and the fixed plate cooperates to further enhance the reliability of the overall fixation, greatly reduce the possibility of fracture end displacement, thereby increasing the convenience of operation, reducing the operation risk of patients. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the axial side structure schematic view of the fixed plate in the utility model;

[0027] Figure 2 It is the axial side structure schematic view of the embracing device in the utility model;

[0028] Figure 3 Figure 3 is a structure schematic diagram of the use state of the present utility model;

[0029] Figure 4 Figure 4 is a structure schematic diagram of the shaft side of the present utility model;

[0030] Figure 5 Figure 5 is a structure schematic diagram of the side view of the fixed plate in the present utility model;

[0031] The reference signs of the present utility model are as follows:

[0032] The ring holder 2, the fixed plate 1, the upper fixed plate 12, the lower fixed plate 13, the claw hook 11, the screw gasket 14, the first arm plate 21, the second arm plate 22, the first bolt fastener 23, the second bolt fastener 24, and the limiting groove 25. DETAILED DESCRIPTION

[0033] The specific embodiments of the present utility model will be described in detail below.

[0034] Unless otherwise defined, technical or scientific terms used in the claims and the specification should have their ordinary meaning as understood by one of ordinary skill in the art to which the present utility model pertains.

[0035] The "comprising" or similar words used in the patent utility model application specification and claims mean that the objects appearing before "comprising" cover the objects listed after "comprising" or its equivalent objects, and do not exclude other objects.

[0036] The numerical values mentioned in the present utility model include all the values increasing one unit from low to high, and it is assumed that there are at least two units between any lower value and higher value. For example, if it is said that a component quantity or a physical quantity is from 1 to 100, 10 to 90 is more optimal, and 20 to 80 is optimal, it is intended to express that the values such as 5 to 95, 14 to 76, 23 to 67, 32 to 58, 41 to 49, etc. are clearly listed in the specification; for the values less than 1, 0.0001, 0.001, 0.01 or 0.1 are considered to be a suitable unit. The foregoing examples are only for illustration, and in fact, all the numerical value combinations between the lowest value and the highest value listed are considered to be clearly listed in the specification in a similar manner.

[0037] EMBODIMENT

[0038] A femoral greater trochanter fixator, comprising: a ring holder 2, and a fixed plate 1 detachably arranged on one side of the ring holder 2;

[0039] The fixed plate 1 comprises a claw hook part, an upper fixed plate 12 fixedly arranged at one end of the claw hook part, and a lower fixed plate 13 fixedly arranged at the other end of the upper fixed plate 12.

[0040] The bending angle of the upper fixed plate 12 is 1° to 45°, the width of the lower fixed plate 13 is 3mm-4mm, the width of the upper fixed plate 12 is greater than that of the lower fixed plate 13, and the thickness of the upper fixed plate 12 and the lower fixed plate 13 is 1mm-3mm.

[0041] The upper fixed plate 12 is uniformly provided with 1-6 first threaded holes along the thickness direction of the upper fixed plate 12, and the lower fixed plate 13 is provided with 1-6 second threaded holes along the thickness direction of the lower fixed plate 13. The upper fixed plate 12 is an arc-shaped plate structure with a bending angle.

[0042] The claw hook part comprises two claw hooks 11 fixedly arranged at both sides of one end of the upper fixed plate 12 respectively, and a screw gasket 14 fixedly arranged between the two claw hooks 11. The screw gasket 14 is provided with a through hole for a screw along the thickness direction.

[0043] The two claw hooks 11 are hook claw structures with a bending angle, and the tip portions of the two claw hooks 11 are bent downward and toward the middle position of the claw hook 11, so that the preliminary positioning and fixing are realized by the bending structure of the claw hook.

[0044] The two claw hooks 11, the upper fixed plate 12, and the lower fixed plate 13 match the curvature of the lateral wall of the proximal end of the greater trochanter of the femur.

[0045] The embracing device 2 comprises a first arm plate 21 and a second arm plate 22.

[0046] The first arm plate 21 is hingedly connected to one end of the second arm plate 22, the other end of the first arm plate 21 is fixedly provided with a first bolt fastener 23, the other end of the second arm plate 22 is fixedly provided with a second bolt fastener 24, and the first bolt fastener 23 and the second bolt fastener 24 are connected by a bolt.

[0047] The first bolt fastener 23 is provided with a first open slot along the thickness direction of the first arm plate 21 away from one side of the first arm plate 21, and the second bolt fastener 24 is provided with a second open slot along the thickness direction of the second arm plate 22 away from one side of the second arm plate 22.

[0048] The first opening slot and the second opening slot are combined to form a limiting slot 25, and one end of the lower fixed plate 13 is detachably arranged in the limiting slot 25.

[0049] The cross sections of the first arm plate 21 and the second arm plate 22 are arc-shaped plate structures, and the first arm plate 21, the second arm plate 22, the first bolt fastener 23 and the second bolt fastener 24 are arranged to form a surrounding arc-shaped structure.

[0050] As a preferred embodiment, the thickness of the first arm plate 21 is 1mm-2.5mm, and the thickness of the second arm plate 22 is 1mm-2.5mm.

[0051] As a preferred embodiment, 2-6 third threaded holes are uniformly arranged in the thickness direction of the first arm plate 21, and 2-6 third threaded holes are uniformly arranged in the thickness direction of the second arm plate 22.

[0052] In use, the fixed plate 1 is held, the structure is observed, the bending direction of the claw hook 11 and the arc characteristics of the upper fixed plate 12 and the lower fixed plate 13 are paid attention to, the claw hook 11 is aligned with the corresponding position of the proximal lateral wall of the greater trochanter of the femur, the tip portions of the two claw hooks 11 are bent downward and towards the middle position of the claw hook 11, and are attached to the contour of the femoral bone wall, and the bending structure of the claw hook is used for preliminary fixation, at this time, the screw gasket 14 should be in a position convenient for operation, the through hole thereof is aligned with the subsequent screw implantation path, and the screw is used for fixing through the first threaded hole and the second threaded hole.

[0053] The first arm plate 21 and the second arm plate 22 are unfolded through the hinge connection end, the first bolt fastener 23 at one end of the first arm plate 21 and the second bolt fastener 24 at one end of the second arm plate 22 are checked, and it is ensured that the bolt can be smoothly operated; after the first arm plate 21 and the second arm plate 22 are unfolded through the hinge connection end, the outer wall surface of the femoral neck or the femoral body is surrounded, one end of the lower fixed plate 13 of the fixed plate 1 which has been preliminarily fixed is correspondingly placed into the limiting slot 25 formed by the combination of the first opening slot and the second opening slot, the first bolt fastener 23 and the second bolt fastener 24 are connected through the bolt, the lower fixed plate 13 is tightly attached to the limiting slot 25, and the ring holder 2 is stably closed.

[0054] The upper fixed plate, the lower fixed plate and the claw hook part in the fixed plate are customized according to the arc of the proximal lateral wall of the greater trochanter of the femur, and the fixed plate can be tightly attached to the bone surface, so that stable support is provided for the fracture site, and the fracture healing is effectively promoted.

[0055] The arm plate in the steel plate is customized according to the front and rear direction arc of the proximal lateral wall of the greater trochanter of the femur, and the fixed plate can be closely attached to the bone surface, especially for wrapping the greater trochanter posterior wall coronal plane fracture, and fixed by screw hole implantation screw, effectively increasing the stability of the lateral wall to the fracture fixation.

[0056] The utility model still combined with the ring embrace device more range gives the ring embrace force of fracture area stability, and the fixed plate synergies, further strengthened the reliability of the whole fixed, greatly reduced the possibility of fracture end displacement, thereby increased the convenience of operation, reduced the patient operation risk.

[0057] The above only for the preferred embodiment of the utility model, not therefore limit the utility model's implementation and protection scope, for the person skilled in the art, should be able to realize that the equivalent replacement and obvious change of the utility model specification and drawing content, all should be contained in the protection scope of the utility model.

Claims

1. A femoral greater trochanter fixator, characterized in that, include: The circumferential device (2) and the fixing plate (1) detachably installed on one side of the circumferential device (2); The fixing plate (1) includes: a claw hook portion, an upper fixing plate (12) fixedly disposed at one end of the claw hook portion, and a lower fixing plate (13) fixedly disposed at the other end of the upper fixing plate (12). The claw hook portion includes: two claw hooks (11) respectively fixedly disposed on both sides of one end of the upper fixing plate (12), and a screw washer (14) fixedly disposed between the two claw hooks (11), wherein the screw washer (14) has a through hole along the thickness direction for the screw to pass through; Among them, the two claw hooks (11) are hook structures with a bending angle, and the tip of the two claw hooks (11) is downward and bent toward the middle position of the claw hook (11). The two claw hooks (11), the upper fixation plate (12), and the lower fixation plate (13) are matched with the curvature of the proximal lateral wall of the greater trochanter of the femur.

2. The femoral greater trochanter fixator according to claim 1, characterized in that, The circumferential device (2) includes: a first arm plate (21) and a second arm plate (22); Wherein, one end of the first arm plate (21) is hinged to one end of the second arm plate (22), the other end of the first arm plate (21) is fixedly provided with a first bolt fastener (23), the other end of the second arm plate (22) is fixedly provided with a second bolt fastener (24), and the first bolt fastener (23) and the second bolt fastener (24) are connected by bolts; The first bolt fastener (23) has a first opening groove on the side away from the first arm plate (21) along the thickness direction of the first arm plate (21), and the second bolt fastener (24) has a second opening groove on the side away from the second arm plate (22) along the thickness direction of the second arm plate (22). The first opening groove and the second opening groove are combined to form a limiting groove (25), and one end of the lower fixing plate (13) is detachably installed in the limiting groove (25).

3. The femoral greater trochanter fixator according to claim 2, characterized in that, The first arm plate (21) and the second arm plate (22) have arc-shaped plate structures in cross section. The first arm plate (21), the second arm plate (22), the first bolt fastener (23), and the second bolt fastener (24) are arranged to form an enclosed arc structure.

4. The femoral greater trochanter fixator according to claim 2, characterized in that, The upper fixing plate (12) has 1-6 first threaded holes evenly formed along the thickness direction of the upper fixing plate (12), and the lower fixing plate (13) has 1-6 second threaded holes formed along the thickness direction of the lower fixing plate (13).

5. The femoral greater trochanter fixator according to claim 2, characterized in that, The first arm plate (21) has 2-6 third threaded holes evenly formed along the thickness direction of the first arm plate (21), and the second arm plate (22) has 2-6 third threaded holes evenly formed along the thickness direction of the second arm plate (22).

6. The femoral greater trochanter fixator according to claim 1, characterized in that, The upper fixing plate (12) is an arc-shaped plate structure with a bending angle.

7. The femoral greater trochanter fixator according to claim 5, characterized in that, The bending angle of the upper fixing plate (12) is between 1° and 45°.

8. The femoral greater trochanter fixator according to claim 2, characterized in that, The thickness of the first arm plate (21) is 1mm-2.5mm, and the thickness of the second arm plate (22) is 1mm-2.5mm; The width of the lower fixing plate (13) is 3mm-4mm, the width of the upper fixing plate (12) is greater than the width of the lower fixing plate (13), and the thickness of the upper fixing plate (12) and the lower fixing plate (13) is 1mm-3mm.

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