CN2253187Y - Automatic locking pressure internal fixation intramedullary nail - Google Patents
Automatic locking pressure internal fixation intramedullary nail Download PDFInfo
- Publication number
- CN2253187Y CN2253187Y CN 95250286 CN95250286U CN2253187Y CN 2253187 Y CN2253187 Y CN 2253187Y CN 95250286 CN95250286 CN 95250286 CN 95250286 U CN95250286 U CN 95250286U CN 2253187 Y CN2253187 Y CN 2253187Y
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- CN
- China
- Prior art keywords
- internal fixation
- nail body
- intramedullary nail
- boss
- utility
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- Expired - Lifetime
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Abstract
The utility model belongs to an internal fixation intramedullary nail which mainly solves the problems that the existing intramedullary nail needs external fixation, and the bending resistance and the torsion strength are not enough. The utility model is characterized in that the internal fixation intramedullary nail comprises a hollow cylindrical nail body. The front end of the hollow cylindrical nail body is provided with a breach, the rear end is provided with a section of screw threads and the end surface is provided with a lug boss. A groove and downward teeth are arranged on a washer with teeth. A hollow screw bolt with a fixed washer and inner and outer screw threads is also arranged in the utility model. The front end of a tie rod is a conical body, the rear end is provided with a section of screw threads and a boss which is conveniently rotated is arranged on the end face of the tie rod. The internal fixation intramedullary nail has the characteristics of automatic interlocking pressure internal fixation, large bending resistance and torsion strength, no need of external fixation, and axenic shielding after operation; in addition, a patient can carry out functional exercise after operation.
Description
This utility model relates to a kind of intramedullary pin for the treatment of Fracture of femur, and particularly a kind of to need not to assist in external fixation be fixable intramedullary pin.
Existing intramedullary nail treatment Fracture of femur is commonly used " V " shape, quincunx, saw shape, " worker " font and grace formula intramedullary pin.Its common weak point that exists is that bending strength and control spinning force are not enough, need assist in external fixation, and easily cause ankylosis, malunion of fracture, complication such as fracture delayed union and nonunion.The external Gyosse Kenmpf with lock that uses recently; Kemnschellmna; The Brroker-wills intramedullary pin, its structure is for enlarging intramedullary pin diameter and horizontal slotting many pinnings.Its weak point is to need to enlarge pulp cavity, destroys blood confession in the marrow, and horizontal slotting many pinnings still have certain stress shielding, and operation needs expensive equipment and apparatus, is difficult to popularization and application at China's basic hospital.
The purpose of this utility model is exactly that a kind of have powerful bending resistance strength and control spinning force, interlocking pressurization and need not to assist in external fixation, postoperative and do not have biology to block, also can ensure the internal fixation intramedullary pin of postoperative functional exercise immediately automatically are provided at above-mentioned weak point.
Technical solution of the present utility model is: a kind of automatic interlocking pressurization internal fixation intramedullary pin, it is characterized in that: comprise the cylindric nail body of a hollow, this nail body front end is provided with three vertical breaches, and the rear end is provided with one section female thread, and end face is provided with boss.Toothed washer with groove corresponding with this boss, this toothed washer is provided with the tooth that stretches out downwards.The screw rod of a band retaining washer, its external screw thread and nail body rear end threaded engagement, this screw rod hollow, and be provided with female thread.One can stretch into the nail body fasten bar, its front end be and follows closely the bullet that body front end breach cooperates, the rear end is provided with one section external screw thread with the screw rod screw-internal thread fit, and end face is provided with the boss of being convenient to rotate.
The middle epimere of the nail body described in this utility model technical solution can have the groove of 7～8cm.
Can be provided with round tube hole on the back segment sidewall of the nail body described in this utility model technical solution.
The bar of fastening of the present utility model is connected by screw rod with the nail body, and toothed washer is on the end face of nail body, and the groove of packing ring is enclosed within on the boss of nail body end face.During use, this utility model intramedullary pin is inserted in the femoral bone cavitas medullaris, make nail body front end reach the fracture far-end, at this moment, make toothed washer block femoral bone tuberosity end cortical bone, with anti-rotation, retreat and fasten bar, the bullet of fastening the bar front end is embedded in the nail body, nail body front end can be opened by automatic umbrella, block the pulp cavity sidewall, finish self-locking.Rotary screw can make intramedullary pin that fracture site is further pressurizeed.Compare with existing intramedullary pin, have need not external fixation can be automatic the characteristics of interlocking pressurization internal fixation, postoperative is provided with biology and blocks, and has very strong bending resistance and anti-twisting property.Adopt this utility model, operation method is simplified greatly.Automatically the interlocking pressurization makes fracture site strong fixing, and can ensure that postoperative carries out functional exercise immediately.
The drawing of accompanying drawing is described as follows:
Fig. 1 is the structural representation of this utility model nail body, and as Figure of abstract;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the structural representation that this utility model is fastened bar;
Fig. 4 is the partial top view of Fig. 3;
Fig. 5 is the structural representation of this utility model screw rod;
Fig. 6 is the right TV structure figure of Fig. 5;
Fig. 7 is the structural representation of this utility model toothed washer;
Fig. 8 is the right TV structure figure of Fig. 7.
The utility model is described in further detail below in conjunction with accompanying drawing: to shown in Figure 8, nail body 1 is cylindric as Fig. 1, whole hollow, and front end is three vertical shape breaches 2, and middle epimere has the groove of 7～8cm, and the rear end is provided with one section female thread, and end face is provided with boss.The effect of round tube hole 10 is, when nail body 1 blocks in pulp cavity, can the injection-drawing out device head be fixed on it by this round tube hole 10, is convenient to extract.Fastening bar 3 front ends is bullet 4, and the rear end is the rectangle boss, and one section screw thread is arranged.Retaining washer 9 is arranged on the screw rod 8, and whole hollow has internal and external screw thread, and the rear end is square, also can be hexagon etc.Toothed washer 5 is provided with two grooves 7 and two teeth 6.During operation, need to use following instrument: be driven into device, guid needle, self-locking wrench, fixed wrench, pressurization wrench and injection-drawing out device head.
Guid needle is inserted intramedullary pin nail body 1 hollow, get nail body 1 from the retrograde operation method of fracture site.Withdraw from guid needle, insert again and fasten bar 3, put toothed washer 5 and screw rod 8, be linked to be fasten bar 3 and nail body 1 as a wholely, cover pressurization wrench and rotation are driven into device again, intramedullary pin can be driven into the fracture far-end, when toothed washer 5 blocks sclerotin, intramedullary pin can not move on again, proves that intramedullary pin puts in place fully, withdraws from being driven into device, import the self-locking wrench along pressurization wrench hollow, block and fasten bar 3 rear ends, the rotary self-locking wrench is when the self-locking wrench backs away when resistance is arranged or withdraws from about 2cm, it is fastened in bullet 4 oneself the embedding nail bodies 1 of bar 3 front ends, nail body 1 front end umbrella is automatically opened, and blocks the pulp cavity sidewall, finishes self-locking.Withdraw from the self-locking wrench, rotation pressurization wrench makes intramedullary pin further pressurize to fracture site, so far finishes automatic interlocking compress intramedullary nail internal fixation overall process.
When intramedullary pin has been pulled out in bony union when fracturing, elder generation on screw rod 8, imports the self-locking wrench to the increased pressure board glove then, rotates about 2cm and can remove interlocking, withdraw from the self-locking wrench, import fixed wrench again, it is fixing to fasten bar 3, at this moment, the about 1cm of rotation pressurization wrench, withdraw from fixed wrench, importing injection-drawing out device head also screws, and can extract intramedullary pin.
Claims (3)
1, a kind of automatic interlocking pressurization internal fixation intramedullary pin, it is characterized in that: comprise the cylindric nail body (1) of a hollow, this nail body (1) front end is provided with three vertical breaches (2), and the rear end is provided with one section female thread, and end face is provided with boss; Toothed washer (5) with the groove corresponding (7) with this boss, this toothed washer (5) is provided with the tooth (6) that stretches out downwards; The screw rod (8) of a band retaining washer (9), its external screw thread and nail body (1) rear end threaded engagement, this screw rod (8) hollow, and be provided with female thread; One can stretch into nail body (1) fasten bar (3), its front end be and follows closely the bullet (4) that body (1) front end breach (2) cooperates, the rear end is provided with one section external screw thread with screw rod (8) screw-internal thread fit, and end face is provided with the boss of being convenient to rotate.
2, automatic interlocking pressurization internal fixation intramedullary pin according to claim 1, it is characterized in that: the middle epimere of described nail body (1) has the groove of 7～8cm.
3, automatic interlocking pressurization internal fixation intramedullary pin according to claim 1 and 2, it is characterized in that: the back segment sidewall of described nail body (1) is provided with round tube hole (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95250286 CN2253187Y (en) | 1995-12-30 | 1995-12-30 | Automatic locking pressure internal fixation intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95250286 CN2253187Y (en) | 1995-12-30 | 1995-12-30 | Automatic locking pressure internal fixation intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2253187Y true CN2253187Y (en) | 1997-04-30 |
Family
ID=33886530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95250286 Expired - Lifetime CN2253187Y (en) | 1995-12-30 | 1995-12-30 | Automatic locking pressure internal fixation intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2253187Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004080319A1 (en) * | 2003-03-13 | 2004-09-23 | Poonung Chieng | An intramedullary nail |
| CN100479775C (en) * | 2003-08-29 | 2009-04-22 | 斯恩蒂斯有限公司 | Intramedullary nail |
| CN112716585A (en) * | 2020-12-30 | 2021-04-30 | 北京中安泰华科技有限公司 | Anti-rotation anti-retreat double-thread hollow nail |
-
1995
- 1995-12-30 CN CN 95250286 patent/CN2253187Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004080319A1 (en) * | 2003-03-13 | 2004-09-23 | Poonung Chieng | An intramedullary nail |
| CN100479775C (en) * | 2003-08-29 | 2009-04-22 | 斯恩蒂斯有限公司 | Intramedullary nail |
| CN112716585A (en) * | 2020-12-30 | 2021-04-30 | 北京中安泰华科技有限公司 | Anti-rotation anti-retreat double-thread hollow nail |
| CN112716585B (en) * | 2020-12-30 | 2022-02-18 | 北京中安泰华科技有限公司 | Anti-rotation anti-retreat double-thread hollow nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |