Femoral greater trochanter locking steel plate and binding method

Abstract

A thighbone greater trochanter locking steel plate comprises a plate body, a trochanter plate and a thighbone plate connected with the trochanter plate, the trochanter plate is matched with the anatomical appearance face of the rear portion of a human thighbone trochanter, the thighbone plate is matched with the anatomical appearance face of the rear portion of a femoral shaft, and a fixing part is arranged on the outer side surface of the trochanter plate. Threading holes are communicated with the two ends of the fixing part in the axial direction of the thighbone, and at least one row of longitudinally-arranged fixing holes are formed in the thighbone plate; the two ends of the fixing line penetrate through the threading holes respectively and are wound on the outer side of the femur; the two ends of the fixing line surround the outer side of the femur by a circle and then are locked on the line tightener. In the application process, when the pressure is applied to reduction of a femoral greater trochanter fracture block, cutting and inward sinking of the fracture block can be reduced, the fracture block can be well reset and stably fixed, and the function of the gluteus medius muscle after the operation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a femoral greater trochanter locking plate and a ligation method. Background Art

[0002] Intertrochanteric fractures of the femur often occur in the elderly population (66 - 76 years old). The elderly have osteoporosis and inflexible limbs. When the lower limb suddenly twists, falls, or the greater trochanter directly touches the ground, it is very easy to cause fractures. Due to the combined stress of varus and anterior angulation on the trochanteric part, it causes coxa vara deformity and the formation of a greater trochanter butterfly fracture with the greater trochanter as the fulcrum. It can also be caused by the sudden contraction of the iliopsoas muscle resulting in an avulsion fracture of the greater trochanter. The bone quality of the trochanteric part is brittle, so the fracture is often comminuted.

[0003] For the reduction and fixation of femoral fracture patients, the conventional treatment method generally adopts internal fixation (internal locking) treatment, using multiple locking screws and a locking plate to form compression locking. However, in the face of this comminuted intertrochanteric fracture of the femur, the internal fixation method requires more screws, which means greater surgical pressure for the operator. Moreover, considering the bone quality of the patients (especially the elderly population), too many screw holes may affect the bone strength of the patients. At the same time, screw fixation is extremely prone to loosening and torsion, and the fixation effect is limited. In addition, there may be a situation where the bone fragments of the femoral trochanter are too small or too thin to facilitate the opening of screw holes. Therefore, the general internal fixation treatment method will cause certain damage to the bone quality, and in severe cases, it will cause secondary damage to the bone. Summary of the Invention

[0004] Aiming at the deficiencies in the background art, the purpose of the present invention is to provide a femoral greater trochanter locking plate and a ligation method.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A femoral greater trochanter locking plate, comprising

[0007] a plate body, including a trochanter plate and a femoral plate connected to the trochanter plate. The trochanter plate is adapted to the anatomical outer surface of the posterior part of the femoral trochanter of the human body, the femoral plate is adapted to the anatomical outer surface of the posterior part of the femoral shaft, a fixing part is provided on the outer surface of the trochanter plate, through holes for threading are communicated at both ends of the fixing part around the axial direction of the femur, and at least one row of longitudinally arranged fixing holes is provided on the femoral plate;

[0008] a fixing wire, the two ends of which are respectively threaded through the through holes for threading and wound around the outside of the femur; and

[0009] a wire tightener, the two ends of the fixing wire are locked to the wire tightener after surrounding the outside of the femur for one week.

[0010] Further, a bone nail for fixing the femur is inserted into the fixing hole, and a fixing coating with an uneven structure is distributed on the side wall of the bone nail.

[0011] Further, the number of the wire threading holes is at least one, and the wire threading holes are arc-shaped holes around the axial direction of the femur.

[0012] Further, a limiting groove for fitting the fixing wire is provided on the outer side surface of the rotor plate on one side of the wire threading hole.

[0013] Further, the wire tightener includes a columnar wire tightening shell, and at least two locking holes are axially penetrated through the wire tightening shell along the vertical direction, and the two locking holes are communicated with each other.

[0014] Further, a wire tightening hole communicating with the two locking holes is provided on the outer peripheral vertical surface of the wire tightening shell, and the wire tightening hole is threadedly connected with a fastener, and the fastener penetrates through the wire tightening hole and is connected to the fixing wire.

[0015] Further, the plate body is made of a metal material; a transition gradient layer is provided between the two regions of the rotor plate and the femur plate.

[0016] A bundling method is applicable to a femoral greater trochanter locking steel plate, and the femoral trochanter fracture is bundled and fixed according to the following steps:

[0017] Step S1, reduction of the femoral greater trochanter fracture: surgically reduce the greater trochanter of the human femur;

[0018] Step S2, preliminary fixation: select a plate body adapted to the size of the patient's femur according to the size of the patient's femur. Taking the plate body as a fixed basis, attach the plate body of the plate body to the femoral shaft and fix it through the fastener. The rotor plate buckles the outside of the femoral greater trochanter to form a preliminary fixation for the reduction of the intertrochanteric fracture of the femur;

[0019] Step S3, bundling of the femoral greater trochanter: both ends of the fixing wire respectively pass through the wire threading holes from bottom to top, cross in an "8" shape and then penetrate through the wire threading holes in opposite directions to realize the "8" shape fixation of the greater trochanter. The fixing wire passing through the wire threading holes is wound around the greater trochanter for at least one week and then locked to the wire tightener to realize the fixation of the greater trochanter;

[0020] Step S4, adjusting and checking the fracture surface: adjust the tightness of the fixing wire to ensure that the fracture surfaces of the femoral greater trochanter are aligned and closely attached.

[0021] Further, in the step S3, the application direction of the fixing wire to the femoral greater trochanter and the axis direction of the femoral neck form an angle of 0-90°.

[0022] Further, the ligation method is adopted to ligate other bone blocks that need to be fixed or repair bone blocks required for an anatomical greater trochanter fracture of the femur.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. A greater trochanter locking plate for the femur proposed by the present invention, through the setting of the plate body, when pressing on the reduced greater trochanter fracture block of the femur, can reduce fracture block cutting and sinking, enable good reduction and stable fixation of the fracture block, and improve the function of the gluteus medius muscle after surgery.

[0025] 2. A greater trochanter locking plate for the femur proposed by the present invention, through the setting of the fixing wire and the wire tightener, can simply and accurately fix the fracture block, reduce soft tissue damage, and shorten the operation time.

[0026] 3. A ligation method proposed by the present invention, the fixing wire relies on the plate body and surrounds the greater trochanter of the femur according to the structure of the femur, and uses the fixing wire and the plate body to squeeze and gather the femoral trochanter, effectively promoting the recovery of the femur, and the femoral reduction and fixation are stable. At the same time, the damage to the patient and the pressure on the operator are greatly reduced during or after the operation. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is one of the scene usage diagrams of a greater trochanter locking plate for the femur of the present invention;

[0029] Figure 2 It is another scene usage diagram of a greater trochanter locking plate for the femur of the present invention;

[0030] Figure 3 It is one of the schematic diagrams of a greater trochanter locking plate for the femur of the present invention;

[0031] Figure 4 It is another schematic diagram of a greater trochanter locking plate for the femur of the present invention.

[0032] In the figure, 10. Plate body; 101. Femoral plate; 1011. Fixing hole; 102. Trochanter plate; 1021. Limiting groove; 103. Fixing part; 1031. Thread-passing hole; 20. Fixing wire; 30. Wire tightener; 40. Bone nail. Detailed Embodiments

[0033] The following is combined with Figures 1-4A detailed description of the present invention is provided.

[0034] A femoral greater trochanter locking plate, characterized by comprising

[0035] a plate body 10, including a rotor plate 102 and a femoral plate 101 connected to the rotor plate 102. The rotor plate 102 is adapted to the anatomical contour surface behind the femoral rotor of the human body, and the femoral plate 101 is adapted to the anatomical contour surface behind the femoral shaft. A fixing portion 103 is provided on the outer surface of the rotor plate 102, and threading holes 1031 communicating around the axial direction of the femur are provided at both ends of the fixing portion 103. At least one row of longitudinally arranged fixing holes 1011 is formed in the femoral plate 101;

[0036] a fixing wire 20, the two ends of which are respectively threaded through the two threading holes 1031 and wound around the outside of the femur; and

[0037] a wire tightener 30, and the two ends of the fixing wire 20 are locked to the wire tightener 30 after surrounding the outside of the femur for one week.

[0038] In this embodiment, the number of the threading holes 1031 is at least one, and the threading holes 1031 are arc-shaped holes around the axial direction of the femur. The fixing portion 103 is a steel plate lug, and the threading holes 1031 are arc-shaped around the femur axis at 30°, and the hole diameter is adapted to the fixing wire 20 for the fixing wire 20 to pass through bidirectionally.

[0039] In this embodiment, a limiting groove 1021 adapted to the fixing wire 20 is provided on the outer surface of the rotor plate 102 on one side of the threading holes 1031.

[0040] The limiting groove 1021 is located on the outer surface of the rotor plate 102, adjacent to the outlet side of the threading holes 1031, that is, the starting point of the path of the fixing wire 20 after passing through and winding around the femur. It extends along the long axis direction of the femur and forms a continuous guiding channel with the arc-shaped path of the threading holes 1031 to guide the fixing wire 20 to smoothly transition to the winding path. The two side edges of the groove opening are designed as rounded corners to avoid sharp edges cutting the wire or damaging the surrounding soft tissues.

[0041] In this embodiment, a bone nail 40 for fixing the femur is inserted into the fixing holes 1011, and a fixing coating with an uneven structure is distributed on the side wall of the bone nail 40. The bone nail 40 is a locking screw with biological activity, made of TC4 titanium alloy, and a nano-hydroxyapatite - collagen composite coating is formed on the thread surface by plasma spraying process, suitable for internal fixation of intertrochanteric fractures of the femur in elderly patients with osteoporosis.

[0042] In this embodiment, the wire tightener 30 includes a columnar wire tightening shell. At least two locking holes are axially penetrated through the wire tightening shell in the vertical axial direction of the device, and the two locking holes are communicated with each other. Further, a wire tightening hole communicating the two locking holes is provided on the outer peripheral vertical surface of the wire tightening shell. The wire tightening hole is threadedly connected with a fastener, and the fastener penetrates through the wire tightening hole and is connected to the fixing wire 20.

[0043] In this embodiment, the plate body 10 is made of a metal material; a transition gradient layer is provided between the two regions of the rotor plate 102 and the femoral plate 101. Specifically, the above-mentioned plate body 10 is made of a stainless steel or titanium implant, and its shape is consistent with the anatomical outer surface at the rear of the femur. Conventional surgical instruments equipped with the fixing wire 20 include, but are not limited to: a fixing wire 20 guide, a tightening forceps, a cutting forceps, etc. The length of the fixing wire 20 is 40 cm, and its diameter is 1.5 mm or 1.7 mm.

[0044] A bundling method is applicable to a femoral greater trochanter locking plate. The femoral trochanter fracture is bundled and fixed according to the following steps:

[0045] Step S1, reduction of femoral trochanter fracture: surgically reduce the trochanter of the human femur;

[0046] Step S2, preliminary fixation: Select a plate body 10 adapted to the size of the patient's femur. Based on the plate body 10 as a fixation basis, the plate body of the plate body 10 is attached to the femoral shaft and fixed by bone nails 40 to form a preliminary fixation for the reduction of the intertrochanteric fracture of the femur;

[0047] Step S3, bundling of the femoral greater trochanter: The fixing wire 20 passes through the wire threading hole 1031, and its two ends cross in an "8" shape and then are inserted through the limiting groove 1021 in the opposite direction to achieve an "8" shape fixation of the greater trochanter. The fixing wire 20 is locked to the wire tightener 30 to achieve the fixation of the greater trochanter; the wire threading holes 1031 on the plate body 10 are arranged staggeredly before and after, which greatly facilitates the operator to insert the fixing wire 20, reduces the operation time, improves the efficiency, and the inner and outer layers coordinate with each other to improve the binding effect.

[0048] Step S4, adjusting and checking the fracture surface: Adjust the tightness of the fixing wire 20 to ensure that the fracture surfaces of the femoral greater trochanter are aligned and closely attached.

[0049] The preparations before the operation are the same as those for the general intertrochanteric femoral fracture surgery. First, select an appropriate surgical approach according to the patient's diagnosis and the guiding principles of the AO classification of intertrochanteric femoral fractures, and perform the reduction of the intertrochanteric femoral fracture. Select a plate body 10 that fits the size of the patient's femur. First, attach the plate body 10 to the femoral shaft, and then, with the plate body 10 as the fixation basis, use a hammer or other pressing method to press the inner side of the plate body 10 against the greater trochanter to press the greater trochanter and form a preliminary fixation for the reduction of the femoral fracture. Ligature of the femoral greater trochanter: At least one fixing wire 20 passes through the wire hole, and the fixing wire 20 is looped around the femoral neck of the femoral greater trochanter. Adjust the tightness of the fixing wire 20 to ensure that the fracture surfaces of the femoral trochanter are aligned and closely adhered. With this ligature method, the fixing wire 20 relies on the plate body 10 and surrounds the femoral neck near the greater trochanter according to the structure of the femur, and uses the squeezing and gathering effect of the fixing wire 20 and the plate body 10 on the femur to effectively promote the recovery of the femur, and the femoral reduction and fixation are stable. At the same time, the damage to the patient and the pressure on the operator are greatly reduced during or after the operation.

[0050] In this embodiment, in step S3, the application directions of the fixing wire 20 to the femoral greater trochanter and the femoral lesser trochanter form an angle of 0-90° with the axis direction of the femoral neck.

[0051] In this embodiment, a ligature method is used to ligate other bone blocks that need to be fixed or the repair bone blocks required for the anatomical femoral greater trochanter fracture.

[0052] The above embodiments are only used to illustrate the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A greater trochanter locking plate, characterized in that: include The plate body comprises a trochanter plate and a femoral plate connected to the trochanter plate, wherein the trochanter plate is adapted to the anatomical outer surface of the rear of the femoral trochanter of a human body, and the femoral plate is adapted to the anatomical outer surface of the rear of the femoral shaft, and a fixing portion is provided on the outer surface of the trochanter plate, and threading holes are connected at both ends of the fixing portion around the axial direction of the femur, and the femoral plate is provided with at least one row of fixing holes arranged longitudinally; A fixing wire, both ends of which are respectively passed through the threading holes and wrapped around the outer side of the femur; and A wire tensioner, wherein the two ends of the fixing wire are locked in the wire tensioner after being wrapped around the outer side of the femur for one circle.

2. The greater trochanter locking plate according to claim 1, characterized in that: A bone screw for fixing the femur is inserted into the fixing hole, and a fixing coating with an uneven structure is distributed on the side wall of the bone screw.

3. The greater trochanter locking plate according to claim 1, characterized in that: The number of the threading hole is at least one, and the threading hole is an arc-shaped hole surrounding the axial direction of the femur.

4. A greater trochanter locking plate as claimed in claim 3, characterized in that: The outer surface of the rotor plate is provided with a limiting groove adapted to the fixing wire on one side of the threading hole.

5. The greater trochanter locking plate according to claim 1, characterized in that: The tensioner comprises a columnar tension shell, in which at least two locking holes are formed along the axial direction, and the two locking holes are connected.

6. The greater trochanter locking plate according to claim 5, characterized in that: The outer peripheral vertical surface of the tightening wire shell is provided with a tightening wire hole which is connected to the two locking holes. The tightening wire hole is threadedly connected with a fastener, and the fastener passes through the tightening wire hole and is connected to the fixing wire.

7. The greater trochanter locking plate according to claim 1, characterized in that: The plate body is made of metal material; a transition gradient layer is provided between the trochanter plate and the femoral plate.

8. A bundling method, applicable to a greater trochanter locking plate as claimed in claims 1 to 7, characterized in that: Follow the steps below to tie and fix the femoral trochanteric fracture: Step S1, reduction of greater trochanteric fracture of femur: performing surgery to reduce the greater trochanter of human femur; Step S2, preliminary fixation: selecting a suitable plate according to the size of the patient's femur, taking the plate as a fixing basis, fitting the plate body on the femoral shaft and fixing it with the bone screws, and the trochanteric plate buckles the outer side of the greater trochanter of the femur to form a preliminary fixation for reduction of the intertrochanteric fracture of the femur; Step S3, tying the greater trochanter of the femur: the fixing wire passes through the threading hole, and the two ends thereof cross each other in an "8" shape and then pass through the limiting groove in opposite directions to achieve the "8" shape fixation of the greater trochanter, and the fixing wire passing through the threading hole is wrapped around the greater trochanter for at least one week and then locked on the wire tightener to achieve the fixation of the greater trochanter; Step S4, adjusting and checking the fracture surface: adjusting the tightness of the fixation line to ensure that the fracture surface of the greater trochanter of the femur is aligned and fits tightly.

9. A bundling method according to claim 8, characterized in that: In step S3, the angle between the force direction of the fixing line on the greater trochanter of the femur and the axis direction of the femoral neck is 0-90°.

10. A bundling method according to claim 9, characterized in that: The bundling method is used to bundle other bone blocks that need to be fixed or repaired for anatomical greater trochanteric fractures of the femur.

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