CN215384522U - Internal fixing device for radius head fracture - Google Patents
Internal fixing device for radius head fracture Download PDFInfo
- Publication number
- CN215384522U CN215384522U CN202121799476.8U CN202121799476U CN215384522U CN 215384522 U CN215384522 U CN 215384522U CN 202121799476 U CN202121799476 U CN 202121799476U CN 215384522 U CN215384522 U CN 215384522U
- Authority
- CN
- China
- Prior art keywords
- intramedullary
- radius
- radius head
- fracture
- nail
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000000034 method Methods 0.000 claims description 10
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 206010037802 Radius fracture Diseases 0.000 abstract description 2
- 208000010392 Bone Fractures Diseases 0.000 description 19
- 206010017076 Fracture Diseases 0.000 description 19
- 210000000988 bone and bone Anatomy 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 230000035876 healing Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 210000003414 extremity Anatomy 0.000 description 3
- 210000000245 forearm Anatomy 0.000 description 3
- 208000024779 Comminuted Fractures Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 206010017088 Fracture nonunion Diseases 0.000 description 1
- 208000002658 Intra-Articular Fractures Diseases 0.000 description 1
- 206010060820 Joint injury Diseases 0.000 description 1
- 208000035965 Postoperative Complications Diseases 0.000 description 1
- 206010061363 Skeletal injury Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000001188 articular cartilage Anatomy 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 210000000845 cartilage Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 210000002758 humerus Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
- 210000000623 ulna Anatomy 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The utility model relates to a radial head fracture internal fixation device, which comprises an intramedullary fixation part, wherein the intramedullary fixation part is uniformly provided with locking nail holes, the bottom of the intramedullary fixation part is provided with a threaded hole, the threaded hole is connected with an elastic intramedullary nail, and the elastic intramedullary nail penetrates through a radial shaft.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to an internal fixing device for radius head fracture.
Background
Fracture of limbs is the most common bone injury in daily life, and particularly, with the development of traffic and construction industries, the fracture tends to increase. Therefore, how to fix the fractured parts of the limbs more simply and more firmly and how to reduce the influence on the blood supply at the fractured parts as much as possible so as to promote the fracture healing is always a key point and a difficult point of attention of orthopedics doctors. When a bone is fractured, the fractured bone needs to be fixed together after being anatomically reset so as to facilitate normal healing, otherwise, poor healing such as dislocation, bone nonunion and the like easily occurs.
The top surface and the side surface of the head of the radius are both covered by articular cartilage for 360 degrees, the upper part and the small head of the humerus form a brachial-radial joint, and the side surface and the upper trace on the ulna form an ulnar-radial joint, which is an important structure for the rotation of the forearm. Fracture of the radius head, which accounts for 0.8% of the total fracture, involves about one third of patients with joint injury. The fracture of the radius head is an intra-articular fracture, if displacement occurs, incision is needed for reduction and internal fixation, the anatomical position is recovered, and early movement is needed to recover the extension and flexion of the elbow joint and the rotation function of the forearm.
At present, the severe comminuted fracture of the radius head is treated by replacing or excising the radius head. If the radius head is required to be reserved, external fixation by an external fixator or internal fixation by a countersunk hollow screw and a radius head steel plate are generally adopted. The external fixator is used for resetting the fracture by performing an operation, the external fixator is arranged outside the limb, and the general external fixator consists of a chuck and a connecting rod, and the fracture is fixed by interlocking the tail part of a percutaneous bone penetrating needle at the upper and lower sections of the fracture with a supporting connecting rod, so that the defect that the needle channel is easy to infect and even cause skin cutting injury is overcome; most of the fixer is arranged outside the body, and the bandage is used for fixing the arm, so that the arm cannot move, and inconvenience is brought to life; meanwhile, the mechanical stability of fixation is poor, and each connecting part is easy to loosen to cause fixation failure; an X-ray positioning lower puncture needle is sometimes needed. The internal fixation of the countersunk hollow screw has limited effect on the fixation of comminuted radius head fracture, has great damage to bone and is easy to cause internal fixation failure; the radius head steel plate is fixed on one side of the radius head, and the steel plate covers the joint surface of part of the radius head, which is easy to cause forearm rotation obstacle.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects, the technical problems to be solved by the utility model are as follows: provides an internal fixing device for radius fracture, which solves the technical problem that the external fixing method in the prior art influences activities and causes inconvenience to life.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the inner fixing device for the fracture of the radius head comprises an intramedullary fixing piece, wherein locking nail holes are uniformly distributed in the intramedullary fixing piece, a threaded hole is formed in the bottom of the intramedullary fixing piece, an elastic intramedullary nail is connected with the threaded hole, and the elastic intramedullary nail penetrates through a radius shaft.
Further, the number of the lock pin holes is 6.
Furthermore, the cross section of the tail end of the elastic intramedullary nail is of a regular hexagon structure.
Furthermore, at least two locking nail holes are connected with locking nails.
Further, the intramedullary fixation member is shaped like a disk and is placed at the metaphysis of the head of the radius, and the diameter of the intramedullary fixation member is one half of the diameter of the head of the radius.
Furthermore, the intramedullary fixing piece is made of a titanium alloy material.
Furthermore, the tail end of the elastic intramedullary nail is exposed out of the position of the radial styloid process.
After the technical scheme is adopted, the utility model has the beneficial effects that:
the method adopts the inner fixing mode of the intramedullary fixing piece to replace the prior outer fixing method, firstly, the method is convenient for the patient to move, cannot influence the life, is firm in fixation and is beneficial to the healing of the fracture; and secondly, the fixing device has unique advantages on comminuted fracture of the radius head, is simpler and more convenient to operate than the fixing of a hollow nail and a steel plate, has better fixing effect and has less postoperative complications. The utility model has simple structure and good use effect, and has no great influence on the daily life of patients.
Drawings
FIG. 1 is a schematic view of an intramedullary fixation member;
FIG. 2 is a structural schematic diagram of the cross-section of FIG. 1;
FIG. 3 is a schematic structural view showing a state in which the internal fixation device for radius head fracture of the present invention is used;
in the figure: 1-intramedullary fixation, 2-locking nail hole, 3-threaded hole, 4-elastic intramedullary nail, 5-radial shaft, 6-radial styloid process and 7-radial head.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1-3, the internal fixing device for radius head fracture comprises an intramedullary fixing member 1, wherein nail locking holes 2 are uniformly distributed on the intramedullary fixing member 1, a threaded hole 3 is arranged at the bottom of the intramedullary fixing member 1, the threaded hole 3 is connected with an elastic intramedullary nail 4, and the elastic intramedullary nail 4 penetrates through a radius shaft 5, so that the fixation of the radius head 7 and the radius shaft 5 is facilitated when the operation is just finished.
The number of the lock nail holes 2 is 6, at least two lock nail holes 2 which are uniformly distributed are connected with locking nails, in the actual operation process, the number of the locking nails is determined according to the fracture degree, when the radius head 7 is broken into three pieces, the three locking nails can be used for fixing the three broken pieces according to the position relation, and the fractured radius head 7 can be restored and fixed.
The cross section of the tail end of the elastic intramedullary nail 4 is of a regular hexagon structure, the regular hexagon structure is designed in such a way that after fracture healing, internal fixation objects in the later period are taken out, and the elastic intramedullary nail 4 can be conveniently screwed out of the intramedullary fixation part 1 by matching with a special internal hexagonal sleeve.
The intramedullary fixing part 1 is in a disc shape, is placed at the metaphysis of the radius head 7, has the diameter of one half of the diameter of the radius head 7, can facilitate the arrangement of six locking nail holes 2, reduces the loss of sclerotin in the radius head 7 to the maximum degree, and is the key for the success or failure of fracture fixation of the radius head 7. The middle of the radius head 7 is a cartilage layer, a proper drill bit is used for drilling a proper space, then the crushed bone blocks are pre-fixed at the positions of the staple holes 2 corresponding to the crushed bone blocks by the aid of Ke's nails or countersunk head nails, the crushed bone blocks are temporarily fixed, the corresponding staple holes 2 are rapidly and accurately inserted by the locking nails to fix the crushed bone blocks, and accordingly the radius head 7 is reset.
The intramedullary fixation piece 1 is made of titanium alloy material, the elastic modulus of the intramedullary fixation piece is close to that of the radius, and complications such as fracture nonunion caused by stress shielding effect are prevented. Secondly, the titanium alloy material is non-magnetic and does not interfere with post-operative magnetic resonance examination.
The tail end of the elastic intramedullary nail 4 is exposed at the position of the radial styloid process 6, the radial styloid process 6 is an important body surface mark of a body, the position surface is shallow, the body surface positioning is convenient, and the elastic intramedullary nail is positioned at the metaphysis end, and can easily reach the medullary cavity of the radius through cancellous bone after being drilled through a percutaneous bone.
The foregoing is illustrative of the best mode of the utility model and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.
Claims (7)
1. The inner fixing device for the radius head fracture is characterized by comprising an intramedullary fixing piece, wherein locking nail holes are uniformly distributed in the intramedullary fixing piece, a threaded hole is formed in the bottom of the intramedullary fixing piece, an elastic intramedullary nail is connected with the threaded hole, and the elastic intramedullary nail penetrates through a radius shaft.
2. The internal fixation device for radius head fracture according to claim 1, wherein the number of the locking nail holes is 6.
3. The internal fixation device for radius head fracture of claim 1, wherein the distal cross-section of said elastic intramedullary nail is a regular hexagon.
4. The internal fixation device for radius head fracture according to claim 2, wherein at least two of said locking pin holes are connected with locking pins.
5. The radius head fracture internal fixation device of claim 1, wherein said intramedullary fixation member is shaped as a disk placed at the metaphysis of the radius head with a diameter of one-half of the diameter of the radius head.
6. The internal fixation device for a radius head fracture of claim 1, wherein the intramedullary fixation member is a titanium alloy material.
7. The internal fixation device for a radius head fracture of claim 1, wherein the distal end of the elastic intramedullary nail is exposed at a location of the radial styloid process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121799476.8U CN215384522U (en) | 2021-08-03 | 2021-08-03 | Internal fixing device for radius head fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121799476.8U CN215384522U (en) | 2021-08-03 | 2021-08-03 | Internal fixing device for radius head fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215384522U true CN215384522U (en) | 2022-01-04 |
Family
ID=79656671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121799476.8U Expired - Fee Related CN215384522U (en) | 2021-08-03 | 2021-08-03 | Internal fixing device for radius head fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215384522U (en) |
-
2021
- 2021-08-03 CN CN202121799476.8U patent/CN215384522U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220104 |