CN101416902A - Elastic intramedullary nail - Google Patents
Elastic intramedullary nail Download PDFInfo
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- CN101416902A CN101416902A CNA2008100799837A CN200810079983A CN101416902A CN 101416902 A CN101416902 A CN 101416902A CN A2008100799837 A CNA2008100799837 A CN A2008100799837A CN 200810079983 A CN200810079983 A CN 200810079983A CN 101416902 A CN101416902 A CN 101416902A
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- nail
- spring body
- intramedullary nail
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Abstract
The invention discloses a flexible intramedullary nail, which pertains to the technical field of orthopedic medical devices and aims at providing a flexible intramedullary nail which can spare secondary operation, eliminate stress shielding, promote fracture healing and has the advantages of simple structure, practicality and low cost. The technical proposal of the invention is that a nail pole of the intramedullary nail consists of a proximal-end nail body, a distal-end nail body and a spring body, wherein, the proximal-end nail body and the distal-end nail body are positioned at both ends of the nail pole respectively and a proximal-end fixed screw hole and a distal-end fixed screw hole are arranged on the two ends; the spring body is arranged in the middle of the nail pole and both ends of the spring body are tightly connected with the proximal-end nail body and the distal-end nail body respectively; the length and quantity of the spring body can be adjusted according to the characteristics of a long bone and the diameter of the spring body can be 2mm to 6mm and can be adjusted according to the requirements of fracture fixing. The flexible intramedullary nail has simple structure and innovative design, resolves the problems of eliminating stress shielding, promoting fracture healing, avoiding secondary operation, and the like after the intrameduallary nail is put in the body, and also has the advantages of simple structure, practicality and low cost.
Description
Technical field
The present invention relates to the intramedullary pin that the shaft fracture internal fixation uses in a kind of orthopaedics clinical treatment, belong to the orthopedic medical device technical field.
Background technology
The human body long bone fracture is the common disease in the orthopaedic medical treatment, adopts usually in clinical treatment and inserts intramedullary pin with fracture end connection and fixing in key pulp cavity.Intramedullary pin is a kind of medical apparatus and instruments of treatment long bone of limbs fracture, but because the rigid structure of himself, insert in the process at intramedullary pin, there is extruding near the soft tissue otch and osseous tissue, cause loss to a certain extent, the more important thing is that intramedullary pin is an axial restraint, the bending of main nail, fracture may take place, situations such as locking fracture.Along with the progress and the development of treatment technology, the technical staff has designed multiple improved intramedullary pin, and as interlocking intramedullary nail etc., what fracture end had been controlled in these uses that improve intramedullary pins effectively bends, turns round, cuts iso-stress, has improved the healing rate of fracture.But in clinical, find, these intramedullary pins are the firm static device, in the process of fractures, there is stress shielding, be unfavorable for union of fracture, the part needs of patients is fixedly carrying out the operation of secondary motorization after a period of time, the screw of a fixed end is unclamped, make intramedullary pin produce fine motion, to promote union of fracture.This method has increased operation number of times and infection chance, has also increased patient's misery and financial burden.The technical staff has designed multiple intramedullary pin and attempts to address this problem for this reason, but structure is all comparatively complicated, that processing technology requires is high, it is comparatively complicated to cost an arm and a leg, perform the operation, promotion effect is affected, and therefore how to design more simple and practical, respond well, low-cost intramedullary pin is a difficult problem that is perplexing shaft fracture technique for fixing development in the orthopaedics clinical treatment always.
Summary of the invention
Technical problem to be solved by this invention provides a kind ofly can avoid second operation, eliminate stress and block, promote union of fracture, and has flexible intramedullary nail simple and practical, the low price advantage.
The technical scheme that solves the problems of the technologies described above is:
A kind of flexible intramedullary nail, its nail bar comprises near-end nail body, far-end nail body, near-end fixing screw hole, far-end fixing screw hole, its improvements are, between near-end nail body and far-end nail body spring body are arranged, and the two ends of spring body firmly are connected with far-end nail body with near-end nail body respectively.
Above-mentioned flexible intramedullary nail, described spring body can be distributed in any position of nail body, are preferably placed at near-end 1/5-1/3 place.
Above-mentioned flexible intramedullary nail as required, also can be provided with along the nail axon a plurality of spring bodies to the interval.
Above-mentioned flexible intramedullary nail can change the number (being the length of spring body) of diameter and spiral according to the different long bones of treatment, and preferably the diameter of spring body is 2-6mm, and each spring body is established 1-5 spiral.
Adopt the flexible intramedullary nail of this structure, the middle part is connected with spring body, and this spring body has high resistance to compression (drawing) intensity, and its length can not shorten or elongate, can only therefore make that the nail bar of flexible intramedullary nail also can be in the different directions fine motion around longitudinal axis fine motion on all directions.During clinical practice, in key pulp cavity, insert flexible intramedullary nail according to the operating routine of intramedullary pin after, along with muscular movement, the human body action of gravity of human body, and under the external force effect, far-end nail body and near-end nail body can produce fine motion.Intramedullary pin can hettocyrtosis in inserting process, minimizing is to the crush injury of surrounding soft tissue, simultaneously itself solid by elasticity and fine motion make and in fracture fixation, at utmost reduce stress shielding that the fine motion of fracture end stimulates the quickly-healing of fracture, avoids the operation of secondary motorization.
The present invention is simple in structure, be skillfully constructed, adopt the simplest design to solve the problem how intramedullary pin eliminates stress and block, promote union of fracture, avoid the long-term puzzlement clinical treatment of second operation etc. after inserting, and the present invention simultaneously also has simple and practical, advantages of cheap price.
Description of drawings
Fig. 1 is the structural representation that is used for the femur internal fixation of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the structural representation that is used for tibia, humerus internal fixation of the present invention;
Fig. 4 is the side view of Fig. 3.
Labelling is as follows among the figure: near-end nail body 1, far-end nail body 2, spring body 3, near-end fixing screw hole 4, far-end fixing screw hole 5
The specific embodiment
Show among the figure that the present invention is a kind of flexible intramedullary nail, it is made up of near-end nail body 1, far-end nail body 2, spring body 3.Near-end nail body 1 and far-end nail body 2 lay respectively at the two ends of nail bar, the middle part of nail bar is a spring body 3, the two ends of spring body 3 firmly are connected with far-end nail body 2 with near-end nail body 1 respectively, on near-end nail body 1 and far-end nail body 2 near-end fixing screw hole 4, far-end fixing screw hole 5 are arranged.
The length and the number of the spring body 3 of nail bar mid portion can be according to long bone characteristics and fracture situation adjustment; Embodiment shows among the figure, and 1-5 spiral arranged on the spring body 3, according to circumstances can increase; The diameter of spring body 3 can be 2-6mm, and can be according to the fixedly requirement adjustment of long bone and fracture.
In design of the present invention, spring body 3 requires to adopt the spring steel of high resistance to compression (drawing) intensity to make, make the nail bar after inserting key pulp cavity, the length of spring body 3 can not shorten or elongate, can only be around longitudinal axis fine motion on all directions, allow the nail bar at flexible intramedullary nail spring body 3 two ends also can be in the different directions fine motion, reaching eliminates stress blocks, promotes the purpose of union of fracture.
How the present invention simple in structure, be skillfully constructed, adopt the simplest design to solve intramedullary nail eliminates after inserting if being Stress shielding, promote union, avoid the clinical problem of long-term puzzlement of second operation etc. that simultaneously the present invention is tool also Simple and practical, low-cost advantage is arranged.
Claims (4)
1. flexible intramedullary nail, its nail bar comprises near-end nail body [1], far-end nail body [2], near-end fixing screw hole [4], far-end fixing screw hole [5], it is characterized in that: between near-end nail body [1] and far-end nail body [2] spring body [3] is arranged, the two ends of spring body [3] firmly are connected with far-end nail body [2] with near-end nail body [1] respectively.
2. flexible intramedullary nail according to claim 1 is characterized in that: described spring body [3] is located at near-end 1/5-1/3 place.
3. flexible intramedullary nail according to claim 1 is characterized in that: described spring body is 1, or a plurality of along following closely axon to being provided with at interval.
4. flexible intramedullary nail according to claim 3 is characterized in that: the diameter of described spring body [3] is 2-6mm, and each spring body is established 1-5 spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100799837A CN101416902A (en) | 2008-12-09 | 2008-12-09 | Elastic intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100799837A CN101416902A (en) | 2008-12-09 | 2008-12-09 | Elastic intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101416902A true CN101416902A (en) | 2009-04-29 |
Family
ID=40628028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100799837A Pending CN101416902A (en) | 2008-12-09 | 2008-12-09 | Elastic intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101416902A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104958103A (en) * | 2015-07-23 | 2015-10-07 | 熊静 | Nail for fixing fracture |
| CN105125266A (en) * | 2015-10-10 | 2015-12-09 | 陈伟 | Self-tapping intramedullary fixation device suitable for long bone fractures |
| CN108553155A (en) * | 2018-05-15 | 2018-09-21 | 河北医科大学第三医院 | A kind of flexible intramedullary nail |
| CN109874311A (en) * | 2018-03-20 | 2019-06-11 | 姜国 | A kind of skull reduction connector |
-
2008
- 2008-12-09 CN CNA2008100799837A patent/CN101416902A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104958103A (en) * | 2015-07-23 | 2015-10-07 | 熊静 | Nail for fixing fracture |
| CN105125266A (en) * | 2015-10-10 | 2015-12-09 | 陈伟 | Self-tapping intramedullary fixation device suitable for long bone fractures |
| CN109874311A (en) * | 2018-03-20 | 2019-06-11 | 姜国 | A kind of skull reduction connector |
| WO2019179091A1 (en) * | 2018-03-20 | 2019-09-26 | 姜国 | Cranial decompression connector |
| CN108553155A (en) * | 2018-05-15 | 2018-09-21 | 河北医科大学第三医院 | A kind of flexible intramedullary nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090429 |