CN2272731Y - Interlocking pressure internal fixation intramedullary nail - Google Patents
Interlocking pressure internal fixation intramedullary nail Download PDFInfo
- Publication number
- CN2272731Y CN2272731Y CN 95225711 CN95225711U CN2272731Y CN 2272731 Y CN2272731 Y CN 2272731Y CN 95225711 CN95225711 CN 95225711 CN 95225711 U CN95225711 U CN 95225711U CN 2272731 Y CN2272731 Y CN 2272731Y
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- nail body
- utility
- pressurization
- model
- intramedullary pin
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Abstract
The utility model provides an interlocking pressure internal fixation intramedullary nail. A nail body is in a solid column shape, and a cross-section is in a square chamfer angle round shape or a prismatic four-wing shape. A head end of the pin body is provided with an elliptic hole for inserting a crosspiece screw, a tail of the nail body is provided with a circular shaft having outer screw threads, and an outer sleeve is provided with a spring and a pressuring internal thread screw nut. The utility model has the functions of strong bending resistant strength, big torsional resistance, wide operation indication and interlocking pressurization. No living thing shielding effect is generated, and no assisting external fixation is needed after the operation. The utility model has the advantages of quick fracture healing, no sequela, simple operation method, etc.
Description
This utility model belongs to medical field, relates to a kind of interlocking pressurization internal fixation intramedullary pin specifically.
In the prior art, the intramedullary pin that partial fracture corrective surgery internal fixation uses has the cloverleaf pattern intramedullary pin, " worker " font intramedullary pin, quincunx and V-arrangement intramedullary pin.What the deficiency that exists was that these intramedullary pins have is hollow-core construction, the bending resistance torsional strength is not enough, no fixture, intramedullary pin activity in marrow is big, easily cause constantly downright bad absorption of osseous tissue to bend, cause malunion and bone does not connect, therefore need assist external fixation, then should cause syndromes such as patient's osteoporosis and ankylosis in the long period.
The external band pin Gyosse Kenmpf that uses recently; Kemnschellmna; The Brroker-Wills intramedullary pin, its construction features is for having enlarged intramedullary pin diameter and horizontal slotting many pinnings, though anti-turning effort is arranged, and can increase constant intensity, but because the expansion of intramedullary pin diameter needs to enlarge pulp cavity, destroyed blood confession in the marrow, horizontally insert many pinnings and still have certain stress shielding, and operation needs advanced equipment and apparatus, be difficult to application popularization at China's basic hospital.
Therefore, the deficiency that prior art exists is: soundness insufficient strength in the steel plate, stress distribution is eccentric to be concentrated, operation need extensively be peeled off periosteum and be had a strong impact on the confession of fracture site blood, prolong bone healing time, the back of bearing a heavy burden produces serious biological occlusion effect, needs long-time external fixation in addition, cause limbs give up usefulness, ankylosis, steel plate bending, malunion of fracture, delayed union, nonunion, even steel plate is got and is removed the back refracture takes place.
The purpose of this utility model be to overcome the deficiencies in the prior art and provide a kind of meet key pulp cavity anatomical features, have that bending resistance strength is strong, twisting resistance is big, the simple indication of operation is wide, have interlocking pressurization function, postoperative does not need external fixation, union of fracture soon, not to stay the back to lose sick interlocking pressurization internal fixation intramedullary pin.
The technical solution of the utility model is: intramedullary pin nail body is the entity column, to increase the intensity of intramedullary pin, the cuboid place time spent cross section of nail body is cubic chamfering circle, its four planes to planar transverse diameter less than the angle of chamfering circle to angular diameter, therefore it is with a contact at the key narrow section of fixing fracture, can not influence the interior blood of pulp cavity and supply and stop up pulp cavity.Another kind is the intramedullary pin that is used in tibia, and its cross section is prismatic four wings, and anteroposterior diameter also is with a contact greater than transverse diameter at fixing key narrow section of fracturing.The said structure design makes the existing better intensity of nail body, has anti-spinfunction again.
Another feature of the present utility model is: the afterbody of intramedullary pin has the external screw thread circular shaft, can with pressurization function is arranged, tapped nut connects, and the mounting and dismounting tool of convenient and intramedullary pin is used.Be enclosed within the outer spring of nut, an end is fixed in the pressurization nut, pushes up mutually with osseous part when the other end uses.After nut screws, fracture site is produced the interlocking pressurization, reach, help growth of spur the strong internal fixation of fracture site.
Another feature of the present utility model is that the head end of intramedullary pin has a vertical slotted eye, for inserting the strut rail screw, has antitorque and the assistance pressurization, and limbs do not produce biological occlusion effect after bearing a heavy burden, and belong to the power type internal fixation.
Afterbody at intramedullary pin also can have a vertical slotted eye, can select for use according to fracture situation is different.
Fig. 1 is the structural representation of this utility model embodiment 1;
Fig. 2 is the profile of Fig. 1;
Fig. 3 is the structural representation of pressurization nut;
Fig. 4 is the structural representation of embodiment 2;
Fig. 5 is the profile of Fig. 4.
Below in conjunction with accompanying drawing this utility model is described in further detail:
Among Fig. 1,1 is intramedullary pin nail body, and its cross section is cubic chamfering circle, and nail body afterbody has the long external screw thread circular shaft 2 of 5cm, can overlap pressurization female thread nut outside circular shaft, and an end of spring fixes with pressurization female thread nut.There is slotted eye 5 at nail body 1 head end 1cm place, and slotted eye 6 is arranged at top, for the usefulness of inserting the strut rail nail.
Fig. 2 for the nail body section, its four planes to planar less than the chamfering round angle to the angular distance diameter.
Fig. 3 is pressurization female thread nut 3, and its female thread matches with nail body cylinder external screw thread, and 4 is spring.
Among Fig. 4,7 are intramedullary pin nail body, and its cross section is prismatic four wings, and afterbody has external screw thread circular shaft 8, can overlap pressurization female thread nut on the external screw thread circular shaft 8, and spring is fixed in nut one end, and the upper and lower part of nail body has elliptical aperture 9,10 respectively, for the usefulness of inserting the strut rail screw.
Fig. 5 is prismatic four wings for the nail body section, and is horizontal narrow vertical wide.
During use, the doctor is the intramedullary pin in zone of preference one hole according to circumstances, or with the intramedullary pin in two holes.
The utility model is applicable to fracture patient operation internal fixation, bone can not occur and postpone more Close, nonunion, malunion, anchylosis, the disadvantages such as osteoporosis have anti-Curved strength is strong, and twisting resistance is big, and the operation wide adaptability has the interlocking pressurization function, does not produce life Thing occlusion effect, postoperative do not need auxiliary in outer fixing, and union is fast, does not stay sequelae, hand The characteristics such as the art method is simple.
Claims (4)
1, a kind of interlocking pressurization internal fixation intramedullary pin, it is characterized in that following closely body (1,7) is the entity cylinder; The head end of nail body (1,7) has for the slotted eye (5,9) of inserting the strut rail screw; Nail body afterbody is external screw thread circular shaft (2,8), and external screw thread circular shaft (2,8) is threaded with pressurization nut (3), and spring (4) one ends that are enclosed within addition are fixing with pressurization nut (3).
2,, it is characterized in that its cross section of said entity column nail body is cubic chamfering circle as the said intramedullary pin of claim 1; Its four planes to planar transverse diameter less than the angle of chamfering circle to angular diameter.
3, as the said intramedullary pin of claim 1, it is characterized in that its cross section of said entity column nail body is prismatic four wings, the anteroposterior diameter of its prismatic is greater than transverse diameter.
4,, it is characterized in that the afterbody of following closely body 1 can have one for the slotted eye (6,10) of inserting the strut rail screw as claim 1 or 2,3 said intramedullary pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95225711 CN2272731Y (en) | 1995-10-31 | 1995-10-31 | Interlocking pressure internal fixation intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95225711 CN2272731Y (en) | 1995-10-31 | 1995-10-31 | Interlocking pressure internal fixation intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2272731Y true CN2272731Y (en) | 1998-01-21 |
Family
ID=33872100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95225711 Expired - Fee Related CN2272731Y (en) | 1995-10-31 | 1995-10-31 | Interlocking pressure internal fixation intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2272731Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101803943A (en) * | 2010-04-23 | 2010-08-18 | 刘志春 | Combined type clavicular intramedullary pin |
| CN101874750B (en) * | 2009-04-30 | 2012-02-01 | 兰州西脉记忆合金股份有限公司 | Automatic pressing dynamic hip riveting device |
-
1995
- 1995-10-31 CN CN 95225711 patent/CN2272731Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101874750B (en) * | 2009-04-30 | 2012-02-01 | 兰州西脉记忆合金股份有限公司 | Automatic pressing dynamic hip riveting device |
| CN101803943A (en) * | 2010-04-23 | 2010-08-18 | 刘志春 | Combined type clavicular intramedullary pin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |