NL2036745A - Intramedullary nail assembly for fracture - Google Patents
Intramedullary nail assembly for fracture Download PDFInfo
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- NL2036745A NL2036745A NL2036745A NL2036745A NL2036745A NL 2036745 A NL2036745 A NL 2036745A NL 2036745 A NL2036745 A NL 2036745A NL 2036745 A NL2036745 A NL 2036745A NL 2036745 A NL2036745 A NL 2036745A
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- 230000003014 reinforcing effect Effects 0.000 claims description 32
- 238000004891 communication Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims 1
- 210000000689 upper leg Anatomy 0.000 abstract description 7
- 208000010392 Bone Fractures Diseases 0.000 description 32
- 206010017076 Fracture Diseases 0.000 description 32
- 238000005728 strengthening Methods 0.000 description 24
- 239000000243 solution Substances 0.000 description 17
- 210000000988 bone and bone Anatomy 0.000 description 13
- 230000000670 limiting effect Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 210000002436 femur neck Anatomy 0.000 description 7
- 208000020089 femoral neck fracture Diseases 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000035876 healing Effects 0.000 description 5
- 206010020100 Hip fracture Diseases 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000001054 cortical effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 210000000527 greater trochanter Anatomy 0.000 description 3
- 206010017088 Fracture nonunion Diseases 0.000 description 2
- 206010028851 Necrosis Diseases 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000017074 necrotic cell death Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 208000008924 Femoral Fractures Diseases 0.000 description 1
- 206010016454 Femur fracture Diseases 0.000 description 1
- 235000012571 Ficus glomerata Nutrition 0.000 description 1
- 240000000365 Ficus racemosa Species 0.000 description 1
- 235000015125 Sterculia urens Nutrition 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001009 osteoporotic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/74—Devices for the head or neck or trochanter of the femur
- A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
- A61B17/744—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to an intramedullary nail
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
UITTREKSEL The present invention provides an intramedullary nail assembly for fracture. The intramedullary nail assembly includes a main nail, a subsidiary nail, and an auxiliary nail. The main nail is provided with a mounting hole. The subsidiary nail penetrates the main nail 5 through the mounting hole and is fixed, to the main nail. The auxiliary nail penetrates the subsidiary nail and is fixedly mounted on the subsidiary nail at an angle with the subsidiary nail. The auxiliary nail cooperates with the subsidiary nail so as to form an anti—rotation structure. With the technical solution of 10 the present invention, on the basis of an original structure of the main nail and the subsidiary nail, the auxiliary nail is added, and the auxiliary nail penetrates the subsidiary nail, such that a femur does not need to be drilled additionally. 15 (+ Fig. l)
Description
INTRAMEDULLARY NAIL ASSEMBLY FOR FRACTURE
The present invention relates to the technical field of appa- ratuses for proximal femur fracture, and particularly relates to an intramedullary nail assembly for fracture.
At present, it is common to use three diametrical annulated compression screws for internal fixation in most of operations for femoral neck fracture and femoral intertrochanteric fracture in
China. This technology has advantages of thinner nail bodies, less damaged blood supply and smaller occupied growth space. Further, it can press broken ends well, such that healing is facilitated.
However, it has a disadvantage of extramedullary fixation. A nail body is fixed to a femoral neck through a greater trochanter. The greater trochanter is a cancellous bone, and the femoral neck is also mainly a cancellous bone. The cancellous bone has a poor holding force, such that the nail body is likely to move in a vast and soft area of the cancellous bone. This can lead to loss of an- gular stability at a neck-shaft angle. If a broken end grows slow- ly, moves or bears weights relatively early, a fixator is easy to loosen or even lose, resulting in nonunion or femoral head necro- sis. In addition, the three annulated compression screws are scat- tered in fixation, and their strength cannot be concentrated. Af- ter operation, a patient has to lie in bed for a long time, and cannot exercise prematurely. In addition, internal fixator break- ing and shift-out are likely to occur in a recovery process, which will cause complications such as fracture nonunion and femoral head necrosis. This tends to increase a disability rate of the pa- tient, and forces the patient into undergoing a secondary opera- tion. However, a femoral neck system (FNS) conducts fixation for femoral neck fracture through transfemoral extramedullary fixa- tion. This method does not conform to biomechanics and has poor stability. At present, a proximal femoral nail (PFN) is mostly used for femoral trochanteric fracture. It has a disadvantage that only one subsidiary nail is fixed to a trans-femoral neck part, and no auxiliary nail exists, such that stability is poor, and nail breaking, nail retreating or other situations are likely to occur.
In order to solve the above problems, a technical solution having the patent publication number CN115530954A is provided in the market. In this technical solution, a proximal end of a main nail is provided with a proximal keyhole inclined upwards and an anti-retreat keyhole inclined downwards, and a distal end of the main nail is provided with a distal keyhole. A subsidiary nail en- ters a femoral head neck in an obliquely upward manner by pene- trating the proximal keyhole, and a circular clamping handle is clamped at one side of the proximal keyhole. An anti-retreat nail penetrates the anti-retreat keyhole, and its front end penetrates a cortical layer. The anti-retreat nail is configured to abut against a tail end of the subsidiary nail, so as to directly stop an unstable trend of the subsidiary nail in the proximal keyhole.
Meanwhile, two proximal cortical locking nails are configured to enhance stability between the subsidiary nail and a femoral head neck bone block. In this way, stability of internal fixation and a bone complex is improved, bearing capacity of limb activities af- ter operation is enhanced, strain at a fracture end is weakened, a healing rate and a healing speed are improved, and complications can be prevented advantageously.
However, the above technology is still likely to have the problem that fracture healing is influenced by rotational dis- placement of a fracture site.
A main objective of the present invention is to provide an intramedullary nail assembly for fracture, so as to solve the problem that fracture healing is likely to be influenced by dis- placement of a fracture site with the intramedullary nail assembly in the prior art.
In order to achieve the above objective, the present inven- tion provides an intramedullary nail assembly for fracture. The intramedullary nail assembly includes: a main nail, where the main nail is provided with a mounting hole; and a subsidiary nail, where the subsidiary nail penetrates the main nail through the mounting hole and is fixed to the main nail. The intramedullary nail assembly further includes: an auxiliary nail. The auxiliary nail penetrates the subsidiary nail and is fixedly mounted on the subsidiary nail at an angle with the subsidiary nail. The auxilia- ry nail cooperates with the subsidiary nail so as to form an anti- rotation structure.
In an embodiment, a tail end of the subsidiary nail is pro- vided with an auxiliary nail guide groove that is inclined rela- tive to the subsidiary nail. The auxiliary nail penetrates the subsidiary nail through the auxiliary nail guide groove.
In an embodiment, a head end of the auxiliary nail is provid- ed with an auxiliary nail connector. The auxiliary nail connector is configured to be connected to inside of a femoral head. A tail end of the auxiliary nail is provided with a threaded fixing part.
The threaded fixing part is connected to the auxiliary nail guide groove.
In an embodiment, a tail end of the main nail is further pro- vided with a reinforcing groove in communication with the mounting hole. The intramedullary nail assembly further includes a rein- forcing nail. The reinforcing nail is inserted into the main nail from the reinforcing groove and extends into a part of the mount- ing hole corresponding to the auxiliary nail so as to be fixed.
In an embodiment, the tail end of the auxiliary nail is fur- ther provided with a cooperation part. The cooperation part is configured to cooperate with the reinforcing nail.
In an embodiment, the intramedullary nail assembly further includes a strengthening nail. A head end of the strengthening nail is provided with a piercing part. A tail end of the strength- ening nail is provided with an operation part. The strengthening nail is provided with an attaching surface attached to the subsid- iary nail. The strengthening nail is attached to the subsidiary nail through the attaching surface and is mounted in the mounting hole.
In an embodiment, the subsidiary nail is provided with a lim-
iting groove. The strengthening nail is provided with a limiting protrusion cooperating with the limiting groove.
In an embodiment, a head end of the subsidiary nail is pro- vided with a subsidiary nail connector. The subsidiary nail con- nector is configured to be connected to the inside of the femoral head.
In an embodiment, the subsidiary nail connector and/or the auxiliary nail connector are/is of a threaded structure or a spi- ral structure.
In an embodiment, an opening of the auxiliary nail guide groove is provided with a first tail cap, and/or the reinforcing groove is provided with a second tail cap.
With the technical solution of the present invention, on the basis of an original structure of the main nail and the subsidiary nail, the auxiliary nail is added, and the auxiliary nail pene- trates the subsidiary nail, such that a femur does not need to be drilled additionally. The mounted auxiliary nail may cooperate with the subsidiary nail so as to form the anti-rotation struc- ture, such that stability of broken ends of a bone may be im- proved, and the broken ends may be effectively fixed. With the in- tramedullary nail assembly of the present invention, a fractured femur may be effectively fixed, and displacement of a broken part may be prevented more effectively. In this way, a patient may re- cover from fracture and conduct rehabilitation activities advanta- geously.
The present invention has other objectives, features and ad- vantages other than the objectives, features and advantages as de- scribed above. The present invention will be further described in detail below with reference to drawings.
The drawings of the description as a constituent part of the present invention are used to provide further understanding of the present invention, and illustrative examples of the present inven- tion and the description thereof are used to explain the present invention, which are not intended to unduly limit the present in- vention. In the accompanying drawings:
FIG. 1 shows a schematic diagram of an overall structure of
Example 1 of an intramedullary nail assembly for fracture accord- ing to the present invention;
FIG. 2 shows a schematic structural diagram of a main nail of 5 the intramedullary nail assembly in FIG. 1;
FIG. 3 shows a second schematic structural diagram of a sub- sidiary nail of the intramedullary nail assembly in FIG. 1;
FIG. 4 shows a third schematic structural diagram of a sub- sidiary nail of the intramedullary nail assembly in FIG. 1;
FIG. 5 shows a schematic structural diagram of an auxiliary nail of the intramedullary nail assembly in FIG. 1;
FIG. 6 shows a schematic diagram of an overall structure of
Example 2 of an intramedullary nail assembly for fracture accord- ing to the present invention;
FIG. 7 shows a schematic structural diagram of a strengthen- ing nail of the intramedullary nail assembly in FIG. 6;
FIG. 8 shows a schematic structural diagram of a specific ap- plication of an intramedullary nail assembly for fracture accord- ing to the present invention; and
FIG. 9 shows a schematic structural diagram of another spe- cific application of an intramedullary nail assembly for fracture according to the present invention.
The above figures include the following reference numerals: 10, main nail; 11, mounting hole; 12, reinforcing groove; 13, distal keyhole; 121, second tail cap; 20, subsidiary nail; 21, auxiliary nail guide groove; 211, first tail cap; 22, limiting groove; 23, subsidiary nail connector; 30, auxiliary nail; 31, auxiliary nail connector; 32, threaded fixing part; 33, coopera- tion part; 40, reinforcing nail; 50, strengthening nail; 51, piercing part; 52, operation part; 53, attaching surface; 54, lim- iting protrusion.
It should be noted that examples in the present invention and features of the examples can be combined with each other without conflict. The present invention will be described in detail below with reference to the drawings and the examples.
In order to enable those skilled in the art to better under- stand the solution of the present invention, the technical solu- tion in the examples of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the examples of the present invention. Obviously, the examples described are merely some examples of the present invention, not all examples. Based on the examples of the present invention, all other examples obtained by those of ordinary skill in the art without making inventive efforts should fall within the scope of protection of the present invention.
It should be noted that “first”, “second”, etc. in the de- scription, claims and above accompanying drawings of the present invention are used for distinguishing similar subjects instead of describing a specific order or precedence order. It should be un- derstood that data used in this way may be interchanged where ap- propriate, so as to facilitate description of the examples of the present invention. Moreover, the terms “include” or “comprise” and “have” as well as any variations thereof are intended to mean cov- ered and non-exclusive inclusion, for instance, a process, a meth- od, a system, a product or a device including a series of steps or units does not need to be limited by those explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or devices.
It should be noted that the terms used herein are merely for describing the detailed description of embodiments and are not in- tended to limit illustrative embodiments according to the present application. As used herein, the singular is also intended to in- clude the plural unless otherwise specified in the context. In ad- dition, it should be understood that the terms “involve” and/or “comprise” or “include” used in the description indicate the pres- ence of features, steps, operations, devices, assemblies, and/or combinations thereof.
FIG. 1 shows Example 1 of an intramedullary nail assembly for fracture according to the present invention. In the Example 1, the intramedullary nail assembly includes a main nail 10, a subsidiary nail 20, and an auxiliary nail 30. The main nail 10 is provided with a mounting hole 11. The subsidiary nail 20 penetrates the main nail 10 through the mounting hole 11 and is fixed to the main nail 10. The auxiliary nail 30 penetrates the subsidiary nail 20 and is fixedly mounted on the subsidiary nail 20 at an angle with the subsidiary nail 20. The auxiliary nail 30 cooperates with the subsidiary nail 20 so as to form an anti-rotation structure.
With the technical solution of the present invention, on the basis of an original structure of the main nail 10 and the subsid- iary nail 20, the auxiliary nail 30 is added, and the auxiliary nail 30 penetrates the subsidiary nail 20, such that a femur does not need to be drilled additionally. The mounted auxiliary nail 30 may cooperate with the subsidiary nail 20 so as to form the anti- rotation structure, such that broken ends of a fracture may effec- tively fixed, and mutual rotation between a distal end and a prox- imal end of the fracture is prevented. With the intramedullary nail assembly of the present invention, a fractured femur may be effectively fixed, and displacement of a broken part may be pre- vented more effectively. In this way, a patient may recover from fracture and conduct rehabilitation activities advantageously.
As shown in FIG. 1, as a preferred embodiment, in a technical solution of Example 1, a tail end of the subsidiary nail 20 is provided with an auxiliary nail guide groove 21 that is inclined relative to the subsidiary nail 20, and the auxiliary nail 30 pen- etrates the subsidiary nail 20 through the auxiliary nail guide groove 21. The auxiliary nail guide groove 21 has two main func- tions that first, the auxiliary nail 30 is mounted, and second, the auxiliary nail 30 is arranged at an angle relative to the sub- sidiary nail 20. The embodiment has an advantage that the auxilia- ry nail 30 does not need to be drilled, and the auxiliary nail guide groove 21 on the subsidiary nail 20 may be directly used.
Alternatively, the auxiliary nail guide groove 21 is provided from the tail end of the subsidiary nail 20 to a position close to a middle section of the subsidiary nail 20.
As shown in FIGs. 1 and 4, in the technical solution of the embodiment, a head end of the auxiliary nail 30 is provided with an auxiliary nail connector 31. The auxiliary nail connector 31 is configured to be connected to inside of a femoral head. A tail end of the auxiliary nail 30 is provided with a threaded fixing part
32. The threaded fixing part 32 is connected to the auxiliary nail guide groove 21. In the embodiment, the auxiliary nail 30 is fixed by connecting its threaded fixing part 32 to the auxiliary nail guide groove 21. The auxiliary nail connector 31 may be screwed into the femoral head and connected to the inside of the femoral head while the auxiliary nail 30 is fixed through threaded connec- tien.
More preferably, in the technical solution of Example 1, as shown in FIG. 5, the threaded fixing part 32 is provided with a screw head structure. The screw head structure has two functions of facilitating screwing of the auxiliary nail 30, and enabling the threaded fixing part 32 to abut against the tail end of the auxiliary nail 30.
Preferably, a head end of the subsidiary nail 20 is provided with a subsidiary nail connector 23. The subsidiary nail connector 23 is configured to be connected to the inside of the femoral head. In the technical solution of Example 1, the subsidiary nail connector 23 is of a straight rod structure. As another alterna- tive embodiment, as shown in FIG. 3, the subsidiary nail connector 23 is of a spiral structure. As another alternative embodiment, the subsidiary nail connector 23 is of a threaded structure. The two structures of the subsidiary nail connector 23 facilitate ef- fective connection of the subsidiary nail connector 23 in the fem- oral head, and improve grasping force and stability. More prefera- bly, the auxiliary nail connector 31 may also be of a threaded structure or a spiral structure.
Alternatively, the tail end of the subsidiary nail 20 may be set to be of a threaded structure, so as to facilitate connection and fixation to a cortical bone outside a greater trochanter.
It should be noted that the above threaded structure is more suitable for fracture of a femoral neck and a subtrochanteric part of a femur, because the threaded structure is capable of grasping the femoral neck. The spiral structure is more suitable for frac- ture of an osteoporotic femoral trochanter, because the spiral structure is capable of better grasping a cancellous bone.
As a more preferable embodiment, as shown in FIGs. 1 and 2, a tail end of the main nail 10 is further provided with a reinforc-
ing groove 12 in communication with the mounting hole 11. The in- tramedullary nail assembly further includes a reinforcing nail 40.
The reinforcing nail 40 is inserted into the main nail 10 from the reinforcing groove 12 and extends into a part of the mounting hole 11 corresponding to the auxiliary nail 30 so as to be fixed. In order to tightly fix the auxiliary nail 30 and the subsidiary nail 20, the reinforcing nail 40 is inserted into the main nail 10 from the reinforcing groove 12, so as to abut against and fix the aux- iliary nail 30 and the subsidiary nail 20 at the mounting hole 11.
Alternatively, an opening of the reinforcing groove 12 is provided with an internal thread, and a tail of the reinforcing nail 40 is provided with an external thread adapted to the internal thread.
The assembly may be used by screwing the reinforcing nail 40 in the reinforcing groove 12.
Alternatively, as shown in FIG. 2, the main nail 10 is fur- ther provided with a distal keyhole 13. The distal keyhole 13 may cooperate with a distal locking nail.
As shown in FIG. 5, in the technical sclution of Example 1, the tail end of the auxiliary nail 30 is further provided with a cooperation part 33. The cooperation part 33 is configured to co- operate with the reinforcing nail 40. In the technical sclution of the example, the cooperation part 33 is of a necking structure having a certain slope, such that the auxiliary nail 30 may main- tain a certain levelness after being obliquely mounted, so as to facilitate cooperation with the reinforcing nail 40.
As shown in FIG. 1, more preferably, in the technical solu- tion of Example 1, an opening of the auxiliary nail guide groove 21 is provided with a first tail cap 211, and the reinforcing groove 12 is provided with a second tail cap 121. After a fracture operation is completed, a bone still needs to grow in tissue. The first tail cap 211 and the second tail cap 121 have a function of blocking a corresponding groove structure and preventing human tissue from growing in the groove structure.
FIG. 6 and FIG. 7 show the technical solution of Example 2 of the present invention. The technical solution of Example 2 is dif- ferent from the technical solution of Example 1 in that the in- tramedullary nail assembly further includes a strengthening nail
50. A head end of the strengthening nail 50 is provided with a piercing part 51. A tail end of the strengthening nail 50 is pro- vided with an operation part 52. The strengthening nail 50 is pro- vided with an attaching surface 53 attached to the subsidiary nail 20. The strengthening nail 50 is attached to the subsidiary nail 20 through the attaching surface 53 and is mounted in the mounting hole 11. During use, the piercing part 51 of the strengthening nail 50 is conveniently driven into the femur, and the subsidiary nail 20 is more firmly mounted in the mounting hole 11 through the cooperation of the strengthening nail 50 with the mounting hole 11 and the subsidiary nail 20.
Alternatively, in the technical solution of Example 2, the piercing part 51 is pitched-cone-shaped, and the operation part 52 is provided with skidproof stripes, such that disassembly of the strengthening nail 50 is facilitated.
As a more preferable embodiment, in the technical solution of
Example 2, the subsidiary nail 20 is provided with a limiting groove 22, and the strengthening nail 50 is provided with a limit- ing protrusion 54 cooperating with the limiting groove 22. When the strengthening nail 50 is mounted in place, the strengthening nail may be clamped into the limiting groove 22, so as to achieve close cooperation with the subsidiary nail 20.
It should be noted that compared with other embodiments de- scribed above, the embodiment having the strengthening nail 50 is more suitable for the case where the subsidiary nail connector 23 is of a spiral structure or a threaded structure, because the sub- sidiary nail 20 needs to rotate relative to the mounting hole 11 in the two cases. In this way, the subsidiary nail 20 may be bet- ter fixed by the strengthening nail 50. As an embodiment having the subsidiary nail connector 23 of a straight rod structure, the strengthening nail 50 may also be omitted, and an overall shape of the mounting hole 11 and the subsidiary nail 20 may be set to be an anti-rotation fitting mechanism, which may be a diamond-shaped or other non-cylindrical structure.
FIGs. 8 and 9 show a schematic structural diagram of an ap- plication of an intramedullary nail assembly of the present inven- tion in two fracture cases.
According to the present invention, when the intramedullary nail assembly is used, firstly, a femoral fracture type of a pa- tient is determined through preoperative X-ray and computed tomog- raphy CT examination, and then a fracture treatment solution is further determined according to the fracture type. When the pa- tient has femoral neck fracture or femoral intertrochanteric frac- ture, a fracture line and bone quality are different. Therefore, an implantation mode of the intramedullary nail assembly selected for fracture treatment is different. For instance, the femoral neck fracture may be classified according to Pauwels. As shown in
FIG. 8 or 9, the medical staff selects a fixation method having the subsidiary nail below and the auxiliary nail obliquely above according to an inclination of the fracture line. If the patient has the femoral neck fracture, the subsidiary nail uses the sub- sidiary nail connector of the threaded structure. The subsidiary nail connector of the threaded structure may form a desirable grasping force on a femoral neck and may tighten and close a frac- ture site well. When the patient has the femoral intertrochanteric fracture of the elderly, the subsidiary nail connector of the spi- ral structure needs to be driven into the cancellous bone for a better grasping force because an intertrochanteric part is filled with cancellous bones.
After determining the fracture type and an operation plan of the patient, the medical staff closes and resets the fracture site on a traction bed, makes a limited incision on an outer side of an upper femoral trochanter, drives the main nail into a femoral me- dullary cavity through a femoral trochanter tip under guidance of a guide pin under assistance with a C-arm or navigation system, enables the guide pin to penetrate the mounting hole through an external guidance system of a specific novel internal fixation im- planting apparatus, where a position of the guide pin is at a cen- ter of the femoral neck, then drives the subsidiary nail through the guide pin, and then screws the auxiliary nail through the aux- iliary nail guide groove on the subsidiary nail. In order to fur- ther strengthen stability of the subsidiary nail and the main nail, the strengthening nail is inserted into a lower part of the subsidiary nail, such that the limiting protrusion on the strengthening nail is nested with the limiting groove on the sub- sidiary nail. In order to further reinforce the subsidiary nail, the mounting hole and the subsidiary nail may be set to be in an irregular diamond shape, so as to achieve clamping fit.
From the above description, it may be seen that the intrame- dullary nail assembly of the present invention is novel in struc- ture and convenient to use and operate. On one hand, young pa- tients all use an extramedullary fixation mode for femoral neck fracture, and the present invention changes the fixation mode into intramedullary fixation, such that stability of fracture recovery is greatly increased, and a probability of fracture nonunion is reduced. On the other hand, elderly patients mostly use a proximal femoral nail (PEN) mode for femoral intertrochanteric fracture, which is poor in anti-rotation force, and is likely to cause shifting, displacement, nail retreating, etc. after operation, re- sulting in failure of internal fixation. The present utility model uses an angular stable fixation mode, and may greatly reduce an incidence of the above situation. The present invention relieves pain and psycholegical burden of the patients and is suitable for popularization and use.
It should be noted that the relative arrangement, numerical expressions and numerical values of components and steps described in the examples do not limit the scope of the present invention unless otherwise specified. Moreover, it should be understood that for convenience of description, dimensions of each part shown in the drawings are not drawn according to a real proportional rela- tion. Technologies, methods and devices known to those of ordinary skill in related art may not be discussed in details, but in ap- propriate cases, they should be regarded as part of the descrip- tion. In all instances shown and discussed herein, any specific value should be interpreted as illustrative only, instead of being limitative. Therefore, different values are possible in other in- stances of the illustrative examples. It should be noted that like numerals and letters denote like items in the following accompany- ing drawings, and therefore, once an item is defined in one accom- panying drawing, it does not need to be further discussed in the subsequent accompanying drawings.
For convenience of description, the spatial relative terms such as “over”, “above”, “on an upper surface” and “on” can be used herein to describe spatial positional relations of one device or feature with other devices or features as shown in the draw- ings. It should be understood that the spatial relative terms are intended to involve different orientations in use or operation in addition to the orientation of the device described in the draw- ings. For instance, if the device in the drawings is inverted, the device described as “above” or “over” other devices or structures would then be positioned “below” or “under” other devices or structures. Therefore, the illustrative term “above” can include two orientations of “above” and “below.” The device can also be positioned in other different ways (rotated by 90 degrees or lo- cated at other orientations), and the spatial relative description used herein is interpreted accordingly.
In the description of the present invention, it should be un- derstood that orientations or positional relations indicated by the orientation terms “front, rear, upper, lower, left and right”, “transverse, vertical, perpendicular, and horizontal”, “top and bottom”, etc. are based on the orientations or positional rela- tions shown in the accompanying drawings and are only for facili- tating the description of the present invention and simplifying the description, and in the absence of a statement to the contra- ry, the orientation terms do not indicate or imply that an appa- ratus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be interpreted as limiting the protection scope of the present invention; and the orientation terms “inside and outside” refer to inside and outside relative to an outline of each component itself.
What are described above are merely preferred examples of the present invention and are not intended to limit the present inven- tion, and those skilled in the art can make various modifications and changes to the present invention. Any modification, equivalent substitution, improvement, etc. within the spirit and principles of the present invention shall fall within the scope of protection of the present invention.
Claims (10)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307583.1A CN116269706A (en) | 2023-03-27 | 2023-03-27 | Intramedullary nail assembly for bone fractures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2036745A true NL2036745A (en) | 2024-02-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2036745A NL2036745A (en) | 2023-03-27 | 2024-01-04 | Intramedullary nail assembly for fracture |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN116269706A (en) |
| DE (1) | DE202023103321U1 (en) |
| NL (1) | NL2036745A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8712991U1 (en) * | 1987-09-26 | 1987-11-05 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Nail for fixation of proximal femoral fractures |
| US20150038967A1 (en) * | 2012-04-04 | 2015-02-05 | Kok Sun Khong | Surgical implant device, method and apparatus for implanting thereof |
| US20210353349A1 (en) * | 2016-09-22 | 2021-11-18 | Globus Medical, Inc. | Systems and methods for intramedullary nail implantation |
| CN113679462A (en) * | 2021-08-30 | 2021-11-23 | 北京市春立正达医疗器械股份有限公司 | Anti-cutting out intramedullary nail |
| CN216962595U (en) * | 2021-06-18 | 2022-07-15 | 包理忠 | Proximal femoral triangular intramedullary nail |
| CN115530954A (en) | 2022-01-26 | 2022-12-30 | 河南省洛阳正骨医院（河南省骨科医院） | Intramedullary nail for enhancing fixation stability of proximal femur fracture and aiming system thereof |
-
2023
- 2023-03-27 CN CN202310307583.1A patent/CN116269706A/en active Pending
- 2023-06-15 DE DE202023103321.0U patent/DE202023103321U1/en active Active
-
2024
- 2024-01-04 NL NL2036745A patent/NL2036745A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8712991U1 (en) * | 1987-09-26 | 1987-11-05 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | Nail for fixation of proximal femoral fractures |
| US20150038967A1 (en) * | 2012-04-04 | 2015-02-05 | Kok Sun Khong | Surgical implant device, method and apparatus for implanting thereof |
| US20210353349A1 (en) * | 2016-09-22 | 2021-11-18 | Globus Medical, Inc. | Systems and methods for intramedullary nail implantation |
| CN216962595U (en) * | 2021-06-18 | 2022-07-15 | 包理忠 | Proximal femoral triangular intramedullary nail |
| CN113679462A (en) * | 2021-08-30 | 2021-11-23 | 北京市春立正达医疗器械股份有限公司 | Anti-cutting out intramedullary nail |
| CN115530954A (en) | 2022-01-26 | 2022-12-30 | 河南省洛阳正骨医院（河南省骨科医院） | Intramedullary nail for enhancing fixation stability of proximal femur fracture and aiming system thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE202023103321U1 (en) | 2023-07-06 |
| CN116269706A (en) | 2023-06-23 |
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