CN215584339U - Pressurized hollow nail - Google Patents
Pressurized hollow nail Download PDFInfo
- Publication number
- CN215584339U CN215584339U CN202120504624.2U CN202120504624U CN215584339U CN 215584339 U CN215584339 U CN 215584339U CN 202120504624 U CN202120504624 U CN 202120504624U CN 215584339 U CN215584339 U CN 215584339U
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- CN
- China
- Prior art keywords
- nail
- head
- main nail
- rod
- locking plate
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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
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 210000002436 femur neck Anatomy 0.000 claims description 18
- 210000000689 upper leg Anatomy 0.000 claims description 17
- 230000007704 transition Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 2
- 210000001694 thigh bone Anatomy 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract 1
- 208000020089 femoral neck fracture Diseases 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 3
- 230000017074 necrotic cell death Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 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
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
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Abstract
The utility model belongs to the technical field of the medical instrument technique and specifically relates to a pressurization hollow nail is related to, its technical scheme main points are including the main nail that is used for connecting thighbone and thighbone neck, with the lockplate that the thighbone was laminated mutually and can control the core bar of displacement between main nail and the lockplate, the one end of core bar is connected with the lockplate, the other end of core bar enters into the main nail inside and is connected with the main nail, has reached the purpose that increases the fixed effect of hollow nail between thighbone neck and the thighbone.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to a pressurizing hollow nail.
Background
At present, femoral neck fracture is a common clinical injury. For young and middle-aged patients and elderly patients with poor physiological state, due to poor body recovery ability, closed reduction can be adopted, and hollow bone screw or traditional hollow locking screw is matched with the locking plate for internal fixation to treat femoral neck fracture.
In the related technology, the hollow bone screw is internally fixed to treat the femoral neck fracture, and the hollow locking screw can be matched with the locking plate to internally fix to treat the femoral neck fracture.
In view of the above-mentioned related art solutions, the inventors found that: because the traditional hollow locking screw is connected with the femoral neck by the self-tapping screw, when the hollow locking screw is pre-tightened, the bone can be damaged, and the symptoms of fracture, femoral head necrosis and the like can also be increased.
SUMMERY OF THE UTILITY MODEL
In order to increase the fixation effect of the cannulated nail between the neck of the femur and the femur, the present application provides a pressurised cannulated nail.
The application provides a pressurization hollow nail adopts following technical scheme:
a pressurized hollow nail comprises a main nail for connecting a femur and a femur neck, a locking plate attached to the femur, and a core bar capable of controlling the displacement between the main nail and the locking plate, wherein one end of the core bar is connected with the locking plate, and the other end of the core bar enters the main nail and is connected with the main nail.
Through adopting above-mentioned technical scheme, the hollow nail includes main nail and lockplate, the main nail can enter into the thighbone neck inside and fix the thighbone neck, the lockplate can be to thighbone looks butt and reciprocal anchorage, the core bar runs through the lockplate and enters into the main nail inside and with main nail fixed connection, core bar and lockplate fixed connection, be connected lockplate and main nail through the core bar, and remove the core bar and can control the distance between main nail and the lockplate, and then can control thighbone neck and lockplate distance between the thighbone promptly, increase the fixed effect of hollow nail between thighbone neck and the thighbone.
Preferably, the mandrel comprises a shank which enters the interior of the main nail and is screwed thereto.
Through adopting above-mentioned technical scheme, the one end that the lockplate was kept away from to the core bar is for entering into the inside pole portion of main nail, pole portion and main nail threaded connection, can control the position between core bar and the main nail when rotatory core bar, and then can realize the control effect of core bar to the main nail.
Preferably, the core rod further comprises a head part, the head part is arranged at one end of the rod part far away from the locking plate, the outer diameter of the head part is larger than that of the rod part, and the head part is connected with the locking plate.
By adopting the technical scheme, the head of the core rod is connected with the locking plate, and the size of the head of the core rod is larger than that of the rod part, so that the possibility that the whole core rod enters the interior of the main nail is reduced.
Preferably, the head is in threaded connection with the locking plate, and the threads of the head of the core rod are in the same direction as the threads of the rod.
By adopting the technical scheme, the head of the core rod is in threaded connection with the locking plate, when the core rod is rotated to connect the rod part of the core rod with the main nail, the head of the core rod and the locking plate can be connected at the same time, and the installation is convenient.
Preferably, the pitch of the stem thread is greater than the pitch of the head of the stem.
Through adopting above-mentioned technical scheme, the screw thread pitch of pole portion is greater than the screw thread pitch of core pole head, consequently when rotatory core pole is installed the core pole, the displacement is greater than the distance between core pole and the lockplate between core pole and the main nail between core pole and the consequently, the distance between core pole and the lockplate will reduce, simultaneously, reduces the clearance between thighbone neck and the thighbone for recovery between thighbone and the thighbone neck reduces the possibility of thighbone necrosis.
Preferably, the head portion is tapered with the tip end facing the stem portion.
By adopting the technical scheme, the head of the core rod is conical, so that when the head of the core rod enters the locking plate, the distance between the locking plate and the core rod is gradually reduced, and the head of the core rod and the locking plate are mutually fixed.
Preferably, the main nail is of a hollow structure, and the head part and the rod part are in conical transition and are matched with the hollow part of the main nail.
By adopting the technical scheme, the rod part and the head part of the core rod are in tapered transition, and a certain gap exists between the threaded connection, so that the matching precision between the core rod and the main nail is low, and after the rod part of the core rod completely enters the interior of the main nail, the connection part is in interference fit with the main nail, so that the core rod and the main nail are mutually fixed, and the positioning precision between the core rod and the main nail is improved.
Preferably, the end surface of the head part of the core rod, which is far away from the rod part of the core rod, is provided with a mounting groove matched with an instrument.
By adopting the technical scheme, the mounting groove is formed in the end face, far away from the rod part of the core rod, of the head part of the core rod, and the appliance is matched with the mounting groove to mount the core rod and the main nail.
In summary, the present application has the following technical effects:
1. by arranging the core bar, the locking plate is connected with the main nail through the core bar, and the distance between the main nail and the locking plate can be controlled by moving the core bar, so that the distance between the femoral neck and the locking plate, namely the femur can be controlled, and the fixation of the hollow nail between the femoral neck and the femur is increased;
2. by arranging the mounting groove, the core bar and the main nail are mounted by matching the tool with the mounting groove.
Drawings
FIG. 1 is an overall configuration view of a hollow nail in the embodiment of the present application;
FIG. 2 is a cross-sectional view of a cannulated nail according to an embodiment of the present application;
figure 3 is an exploded view of a hollow spike in an embodiment of the present application.
In the figure, 1, main nail; 11. a straight slot; 2. a core bar; 21. a head portion; 22. a rod portion; 23. mounting grooves; 3. a locking plate; 4. the femur; 41. the neck of the femur.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Referring to fig. 1 and 2, the application provides a pressurization hollow nail for fixing a femur 4 and a femur neck 41, which comprises a main nail 1, a locking plate 3 attached to the femur 4 and a core bar 2 used for connecting the main nail 1 and the locking plate 3, wherein the locking plate 3 is in a shape matched with the position of the femur 4 close to the femur neck 41, the main nail 1 is installed inside the femur 4 and the femur neck 41, the main nail 1 and the locking plate 3 are connected through the core bar 2, after the main nail 1 is fixed with the femur neck 41, the core bar 2 can pressurize the position between the main nail 1 and the locking plate 3, further the distance between the femur neck 41 and the femur 4 is smaller, and the effect of the hollow nail on the position between the femur neck 41 and the femur 4 is enhanced.
Referring to fig. 2 and 3, the head of the main nail 1 is a thread structure and has a self-tapping function, so that the main nail 1 can be rotated to fix the main nail 1 inside the femoral neck 41, the top of the main nail 1 is provided with a straight groove 11, and the main nail 1 can be driven to rotate by matching an instrument with the straight groove 11, so that the main nail 1 can be installed on the femoral neck 41.
Referring to fig. 2 and 3, the main nail 1 is of a hollow structure, an internal thread is formed on the hollow inner wall of the main nail 1, the mandrel 2 comprises a rod part 22 and a head part 21 which are coaxially arranged, the rod part 22 is arranged on one side of the head part 21, which is far away from the locking plate 3, and is fixedly connected with the head part 21, an external thread is formed on the circumferential surface of the rod part 22, the rod part 22 is arranged inside the main nail 1 and is in threaded connection with the main nail 1, the outer diameter of the head part 21 is larger than that of the rod part 22, and the possibility that the mandrel 2 completely enters the inside of the main nail 1 is reduced. When the head part 21 is rotated, the position between the core rod 2 and the main nail 1 will generate relative movement, so that the main nail 1 can drive the femoral neck 41 to move towards the locking plate 3, and further the distance between the femoral neck 41 and the femur 4 is reduced.
Referring to fig. 2 and 3, a plurality of tapered threaded holes are uniformly formed in the locking plate 3, the tips of the tapered threaded holes face the femur 4, and the head 21 is tapered to match the threaded holes of the locking plate 3; the periphery of the head part 21 is provided with an external thread with the same thread turning direction as the rod part 22, and the thread pitch of the thread between the external thread of the head part 21 and the thread hole matched with the external thread is half of that of the external thread of the rod part 22. When the rod part 22 is screwed into the main nail 1, the head part 21 of the core rod 2 is driven to gradually enter the locking plate 3, and the head part 21 is connected with the locking plate 3; therefore, when the core rod 2 is screwed in between the main nail 1 and the locking plate 3, due to the pitch difference between the rod part 22 and the head part 21 of the core rod 2, the displacement between the main nail 1 and the core rod 2 will be larger than the displacement between the core rod 2 and the locking plate 3, and then the core rod 2 will drive the main nail 1 and the locking plate 3 to move towards the direction of approaching each other, thereby realizing the function of reducing the distance between the femur neck 41 and the femur 4.
Referring to fig. 2 and 3, the head 21 and the rod 22 of the core rod 2 are in tapered transition, and the rod 22 of the core rod 2 is in threaded connection with the main nail 1, so that certain errors can exist during processing of threads, and the positioning accuracy between the rod 22 of the core rod 2 and the main nail 1 is low, so that after the core rod 2 is installed inside the main nail 1, the tapered transition can be in interference fit with the main nail 1, and further the core rod 2 and the main nail 1 are fixed, and the positioning accuracy is improved.
Referring to fig. 2 and 3, a linear mounting groove 23 is formed in an end surface of the head 21 away from the rod 22, and the core rod 2 can be driven to rotate by using the cooperation between an instrument and the mounting groove 23, so that the core rod 2 can connect the main nail 1 and the locking plate 3.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A pressurized hollow nail is characterized in that: the nail fixing device comprises a main nail (1) used for connecting a femur (4) and a femur neck (41), a locking plate (3) attached to the femur (4), and a core rod (2) capable of controlling displacement between the main nail (1) and the locking plate (3), wherein one end of the core rod (2) is connected with the locking plate (3), and the other end of the core rod (2) enters the main nail (1) and is connected with the main nail (1).
2. A pressurized hollow nail according to claim 1, characterized in that: the core rod (2) comprises a rod part (22), and the rod part (22) enters the interior of the main nail (1) and is in threaded connection with the main nail (1).
3. A pressurized hollow nail according to claim 2, characterized in that: the core rod (2) further comprises a head (21), the head (21) is arranged at one end, far away from the locking plate (3), of the rod part (22), the outer diameter of the head (21) is larger than that of the rod part (22), and the head (21) is connected with the locking plate (3).
4. A pressurized hollow nail according to claim 1, characterized in that: the head (21) is in threaded connection with the locking plate (3), and the thread of the head (21) and the thread of the rod (22) are in the same rotating direction.
5. A pressurised hollow nail according to claim 4, wherein: the thread pitch of the rod part (22) is larger than that of the head part (21) of the core rod (2).
6. A pressurised hollow nail according to claim 5, characterised in that: the head (21) is tapered with its tip facing the stem (22).
7. A pressurised hollow nail according to claim 6, characterised in that: the main nail (1) is of a hollow structure, and the head part (21) and the rod part (22) are in conical transition and are matched with the hollow part of the main nail (1).
8. A pressurised hollow nail according to claim 7, characterised in that: an installation groove (23) matched with an instrument is arranged on the end surface of the rod part (22) of the head part (21) far away from the core rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120504624.2U CN215584339U (en) | 2021-03-09 | 2021-03-09 | Pressurized hollow nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120504624.2U CN215584339U (en) | 2021-03-09 | 2021-03-09 | Pressurized hollow nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215584339U true CN215584339U (en) | 2022-01-21 |
Family
ID=79869504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120504624.2U Expired - Fee Related CN215584339U (en) | 2021-03-09 | 2021-03-09 | Pressurized hollow nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215584339U (en) |
-
2021
- 2021-03-09 CN CN202120504624.2U patent/CN215584339U/en not_active Expired - Fee Related
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Legal Events
| 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: 20220121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |