CN102835997A - Static power exchange thighbone intramedullary nail - Google Patents
Static power exchange thighbone intramedullary nail Download PDFInfo
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- CN102835997A CN102835997A CN 201210293345 CN201210293345A CN102835997A CN 102835997 A CN102835997 A CN 102835997A CN 201210293345 CN201210293345 CN 201210293345 CN 201210293345 A CN201210293345 A CN 201210293345A CN 102835997 A CN102835997 A CN 102835997A
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Abstract
The invention discloses a static power exchange thighbone intramedullary nail, which comprises a nail main body, wherein a coronal plane at the far end of the nail main body is provided with a first sliding lock hole and a third sliding lock hole; a vertical plane at the far end of the nail main body is provided with a second sliding lock hole and a fourth sliding lock hole; the first sliding lock hole, the second sliding lock hole, the third sliding lock hole and the fourth sliding lock hole are long holes; the end part of the long holes are circular-arc-shaped; the third sliding lock hole is longer than the first sliding lock hole; the fourth sliding lock hole is longer than the second sliding lock hole; the vertical plane at the far end of the nail main body is provided with a positioning platform; and the center of the positioning platform is provided with a third static lock hole. Due to the adoption of the static power exchange thighbone intramedullary nail disclosed by the invention, early static fixation of bones can be realized, motorization can be performed in case of delayed healing of bone fractures, static fixation is performed after motorization is performed appropriately, motorization can be performed once again, static fixation is performed after motorization is performed appropriately, and controllable adjustment is performed on dynamic and static fixation, so that rapid healing of bone fractures is facilitated.
Description
Technical field
The present invention relates to a kind of intramedullary pin, especially relate to a kind of the realization and can implement motorization the early stage static fixation of skeleton; Static fixation after motorization puts in place; Can implement motorization again, static fixation after motorization puts in place is fixedly carried out controllability to sound power and is regulated; Thereby promote the quiet power crossover femoral interlocking nail of the quickly-healing of fracture, belong to technical field of medical instruments.
Background technology
Intramedullary nail with lock is the main flow internal fixation apparatus of the fracture of present orthopaedics field treatment long bone, and the deficiency that it has overcome common intramedullary pin torsional rotation force difference is the direction of the key fractures development of extremity.It can effectively prevent the fracture site cripetura, has that torsional rotation force is strong, stress force shelter reaction is little, an advantage such as firm fixation, infection rate are low, and it adopts center fixation; The conduction of fracture end mechanics is the stress sharing type, meets body mechanics's conduction pattern, and is few to the biomechanics interference of limbs; The line of force of fracture fixation is on the key axis, and the suffered stress of nail body is little, can effectively control fracture end and reverse; Prevent cripetura; Fixation makes fracture that stable healing environment arranged, and is widely used in the treatment of extremity fracture.Common femoral interlocking nail far-end coronalplane has 2 circular holes at present, uses pinning locking back to be static fixation in the operation, has stress shielding; Fracture end lacks the needed longitudinal stress of union of fracture to stimulate, and is prone to clinically cause fracture delayed union even bone does not connect, causes adverse consequences; Even near-end has a sliding eye; But after power nail of the real reservation of taking-up static(al) pinning was executed motorization, swing can appear in fracture end, influences union of fracture.Sometimes fracture near near end of thighbone, can only take out 2 static(al) nails of far-end and implement motorization, because the DF pulp cavity increases; After taking out 2 static(al) pinnings of far-end; Fracture end does not have the pinning locking and rotation and swing displacement occur, influences union of fracture, forms hypertrophy property bone does not connect easily.The patentee obtained the Chinese invention patent (patent No.: 200920068425.0) disclose a kind of sound power crossover tibial intramedullary nailing in 2009; The intramedullary pin of this structure adopts the power nail vertically to exchange with the static(al) nail and slides; Increase the power contact of fracture end, have advantages such as the bone of preventing shortening and fracture end rotation displacement and promotion union of fracture.The case of bone does not connect does not appear after clinical use, and evident in efficacy.Find in the clinical use that this intramedullary pin is after taking out far-end static(al) pinning; Far-end respectively remains with a slip pinning at sagittal plane and coronalplane; Can eliminate rotation displacement; But because distal lockhole is elongated hole, still have swing to a certain degree at sagittal plane and coronalplane after the motorization, the fracture para-position is before not good enough than motorization to line.Though also do not find therefore to influence the case of union of fracture, but exist not enough.The DF pulp cavity is bigger, if the design of intramedullary pin does not change, above-mentioned swing maybe be bigger, and is unfavorable to union of fracture.
Seeing that the deficiency of general static force type femoral interlocking nail and the clinical use of sound power crossover tibial intramedullary nailing obtain good result; Realize the effective conversion between static fixation and dynamic fixation of interlocking intramedullary nail; Effectively promoting the fracture of shaft of femur healing, is that the intramedullary nail with lock technology is needed a technical problem that will solve at present badly.
Summary of the invention
The present invention seeks to provide a kind of for the deficiency that overcomes prior art realizes the early stage static fixation static fixation of skeleton; Can implement motorization during fracture delayed union; The motorization back static fixation that puts in place can be implemented motorization, static fixation again after motorization puts in place again; Sound power is fixedly carried out controllability regulate, thus the quiet power crossover femoral interlocking nail of the quickly-healing of promotion fracture.
For achieving the above object, the technical scheme that the present invention adopts is: a kind of quiet power crossover femoral interlocking nail comprises the nail main body; The coronalplane of said nail body distal end is provided with the first slip lockhole and the 3rd slip lockhole; The sagittal plane of said nail body distal end is provided with the second slip lockhole and the 4th slip lockhole, and the said first slip lockhole, the second slip lockhole, the 3rd slip lockhole, the 4th slip lockhole are elongated hole; The end of said elongated hole is a circular arc; The length of said the 3rd slip lockhole is longer than the length of the first slip lockhole; The length of said the 4th slip lockhole is longer than the length of the second slip lockhole; The sagittal plane of said nail body distal end is provided with a locating platform; There is one the 3rd static(al) lockhole in the central authorities of said locating platform.
Preferably, the near-end of said nail main body is provided with the first static(al) lockhole and the second static(al) lockhole, and the said first static(al) lockhole and the second static(al) lockhole are arranged on orthogonal; The near-end and the sagittal plane of said nail main body laterally arrange.
Preferably, the length of the said first slip lockhole, the second slip lockhole, the 3rd slip lockhole, the 4th slip lockhole increases gradually.
Preferably, the parallel axes of the major axis of said elongated hole and said nail main body.
Beneficial effect of the present invention is mainly reflected in:
1, the coronalplane of nail body distal end is different with sagittal plane slide lock hole length; Take out the pinning in the far-end coronalplane static(al) hole, through the first and the 3rd slip lockhole and the sagittal plane second and the 4th sliding eye realization motorization of coronalplane, making fracture end receive physiological stress stimulates the promotion union of fracture; After if the pinning in the sagittal second slip lockhole runs out of steam and turns usefulness into; Fracture is not healing fully still, can get the pinning in the first slip lockhole again, realizes motorization through all the other moving lock holes; Promote union of fracture, can realize that static fixation-motorization-static(al)-motorization-controllability of static fixation is regulated again again;
2, two slip lockholes have respectively been established on nail body distal end sagittal plane, the coronalplane; After taking out far-end sagittal plane static(al) pinning motorization, still keep the nail body distal end two power nail associating interlockings respectively to be arranged, prevent rotation displacement at sagittal plane and coronalplane; Anti-non-magnetic shim main body is swung on coronalplane and sagittal plane; The assurance fracture end realizes stablizing motorization under state with lock, increase the effective physiological stimulation of fracture end, promotes union of fracture;
3, relative normal tape lock intramedullary nail; Quiet power crossover femoral interlocking nail, guaranteeing at least that far and near end is two-sided in fracture healing process respectively has one piece of pinning, can resist under the situation of rotating the cripetura that prevents to fracture; The motorization chance is provided 2-3 time, union of fracture is become a reality;
4, five pieces of pinning designs of nail body distal end, fixation, stress disperses, and sequencing takes out the pinning that meets with stresses, and the pinning working time is short, prevents the pinning fracture;
5, coronalplane and sagittal plane associating interlocking uses the thin intramedullary pin that does not expand marrow, and swing can not appear in the nail main body yet on coronalplane, does not expand marrow and can reduce the artificial destruction that blood in the marrow is supplied, and helps union of fracture;
6, at the physiological healing process of fracture, because the design of power hole, fracture end obtains the necessary mechanical stress of union of fracture all the time under the interlocking state stimulate; Healing time is short; Reduce the generation of bone delay in healing or bone does not connect, avoid repeatedly performing the operation, the patient suffering is little; Economic cost is few, and social benefit is good;
7, far-end slides and follows closely, and that is to say the screw technology that stops of having utilized, and constriction DF pulp cavity reduces intramedullary pin and swings unstable " artificially "; The distal-most end locking nail hole dwindles intramedullary pin distal-most end locking nail hole and leaves with the nail end-to-end distance to the terminal displacement of nail, and the desirable pulp cavity that also just enables to satisfy the intramedullary pin internal fixation has obtained " extensions " to far-end, to enlarge the indication that intramedullary pin resected femur far-end is fractured; Make Methods for Distal Femoral Fractures no longer be to use the contraindication of intramedullary pin, also need not re-use down and beat intramedullary pin, avoid getting into knee joint, avoid the people for causing knee joint injury, even the concurrent infection of joint, handicapped complication;
8, there is pinning that the nail main body is slided in the power pressure process all the time and limits, can effectively avoid intramedullary pin to withdraw from danger such as fracture shift separation or breakthrough DF joint;
9, the utilization of the quiet power crossover of the design femoral interlocking nail; Can treat the ultra section fracture far away of femur well, avoid the use of the otch reset plate and fix, prevent that effectively postoperative skin is downright bad; Exposed bone; The generation of complication such as osteomyelitis can solve can not resected femur ultra this a great problem of section fracture far away of non-open reduction of present puzzlement orthopaedic trauma doctor, can be used for treating the femur bone does not connect after other fixed forms treatments.
Description of drawings
Below in conjunction with accompanying drawing technical scheme of the present invention is described further:
Fig. 1 is the axonometric chart of quiet power crossover femoral interlocking nail of the present invention;
Fig. 2 is the front view of quiet power crossover femoral interlocking nail of the present invention;
Fig. 3 is the vertical view of quiet power crossover femoral interlocking nail of the present invention;
Wherein: 1, nail main body; 2, the first static(al) lockhole; 3, circular static(al) lockhole; 4, the first slip lockhole; 5, the second slip lockhole; 6, the 3rd slip lockhole; 7, the 4th slip lockhole; 8, locating platform; 9, the 3rd static(al) lockhole.
The specific embodiment
Be depicted as a kind of quiet power crossover femoral interlocking nail according to the invention like accompanying drawing 1-3, comprise nail main body 1; The coronalplane of said nail main body 1 far-end is provided with the first slip lockhole 4 and the 3rd slip lockhole 6; The sagittal plane of said nail main body 1 far-end is provided with the second slip lockhole 5 and the 4th slip lockhole 7, and the said first slip lockhole 4, the second slip lockhole 5, the 3rd slip lockhole 6, the 4th slip lockhole 7 are elongated hole; The end of said elongated hole is a circular arc; The parallel axes of the major axis of said elongated hole and said nail main body 1; The wide of the said first slip lockhole 4 is 4mm, and long is 6mm; The wide of the said second slip lockhole 5 is 4mm, and long is 8mm; The wide of said the 3rd slip lockhole 6 is 4mm, and long is 9mm; The sagittal plane of said nail main body 1 far-end is provided with a locating platform 8; There is one the 3rd static(al) lockhole 9 in the central authorities of said locating platform 8, the usefulness of location during with convenient the use; The near-end of said nail main body 1 is provided with the first static(al) lockhole 2 and the second static(al) lockhole 3, and the said first static(al) lockhole 2 and the second static(al) lockhole 3 are arranged on orthogonal; The near-end and the sagittal plane of said nail main body 1 laterally arrange.
Quiet power crossover femoral interlocking nail of the present invention in use, to unstable fracture, pinning all pins; Early stage is static fixation; Through pinning static fixation in the 3rd static(al) lockhole 9, treat to obtain in the fracture healing process relatively stable after, remove the pinning of the 3rd static(al) lockhole 9.This moment, fracture was there being two pinnings on far-end sagittal plane and the coronalplane down fixing, through the first slip lockhole, 4 motorizations of far-end coronalplane, to increase the stimulation of fracture end, the promotion union of fracture.Static fixation a period of time after the far-end coronalplane first slip lockhole 4 puts in place; By determining according to the union of fracture situation whether needs take out the slip pinning in the far-end coronalplane first slip lockhole 4; Realize motorization again through the sagittal second slip lockhole 5 of far-end, generally once effective motorization can realize union of fracture.If desired, take out the far-end nearside sagittal plane second slip lockhole 5 and realize motorization, far-end has the pinning locking all the time like this, rotation displacement can not occur swinging, and fracture end existence stimulation under steady statue all the time in fracture healing process is to promote union of fracture.When the far-end sagittal plane second slip lockhole 5 slip pinnings slide into slip lockhole upper end, be static fixation.Intramedullary pin can be realized the motorization of the early stage static fixation～motorization～staticization of fracturing～again～regulate to the controllability of staticization.
The use of quiet power crossover femoral interlocking nail of the present invention makes the conversion of sound power interlocking be achieved, to metastable fracture; Carrying out the power interlocking fixes; Far-end only locks the first slip lockhole 4 of the sagittal second slip lockhole 5, the 4th slip lockhole 7 and coronalplane, the pinning in the 3rd slip lockhole 6, and early stage motorization under anti-rotation status makes fracture end bear axial compressive force equably; Increasing fracture end stimulates, and meets the biomechanical principle of union of fracture.For unstable fracture, hold pinning all to lock distance, can keep limbs length can control rotation again; Stable fracturing end occurs and evaluation union of fracture of successive time of cortical bone situation according to callus, can remove far-end coronalplane static(al) pinning for having when showing existing stability on the delayed union tendency person X sheet or having obtained metastable fracture; Changing static force type is fixed as power type and fixes; Realize motorization through the coronalplane sliding eye, making fracture end receive physiological stress stimulates the promotion union of fracture, following in the anti-cripetura situation that prevents to fracture of rotating; The motorization chance is provided 2 to 3 times, avoids fracture delayed union even bone does not connect.
Quiet power crossover femoral interlocking nail of the present invention provides the static(al) attitude to fix and has combined with power attitude immobile phase, meets the mechanical environment of union of fracture, can stimulate growth of spur, promotes union of fracture.The sliding eye that design length is different, according to fracture cripetura situation, motorization is successively taken out and is born the pinning of torsional load and shearing force at times, effectively avoids the pinning fracture.
Quiet power crossover femoral interlocking nail of the present invention can not produce serious displacement fracture and limb shortening; But can increase the stress conduction that helps union of fracture; Very favourable to union of fracture. the structural many sliding eye designs of quiet power crossover intramedullary pin, do not change the mechanical property of following closely main body and pinning, graded takes out pinning or power nail; Shorten the working time of pinning or power nail; Reduce the generation of broken nail, have pinning that the nail main body is slided in the power pressure process all the time and limit, can effectively avoid intramedullary pin to withdraw from or break through DF getting into danger such as joint.The sagittal plane pinning of quiet power exchange interlocking intramedullary nail design, the nail main body is meticulous in the time of can effectively preventing not expand marrow significantly increases the coronalplane swing of thick existence with the DF pulp cavity.
Quiet power crossover femoral interlocking nail of the present invention promotes union of fracture, prevents fracture delayed union or bone does not connect, has exempted operative treatment bone does not connect once more, reduces the patient suffering, reduces the financial burden.For comparatively stable distal fracture of femur, also can not lock the sagittal plain screw, just be equivalent to not use stop nail, return common intramedullary pin, realize the many usefulness of a nail.
The utilization of quiet power crossover femoral interlocking nail of the present invention can be treated the ultra section fracture far away of femur well, avoids the use of the open reduction steel plate and fixes; Prevent that effectively postoperative skin is downright bad, exposed bone, the generation of complication such as osteomyelitis; Can solve non-incision this a great problem of section can not resected femur far away of present puzzlement orthopaedic trauma doctor; Can effectively treat fracture of shaft of femur, control fracture delayed union and bone does not connect are a kind of effective ways of treatment fracture of shaft of femur and bone does not connect.
The foregoing description only is explanation technical conceive of the present invention and characteristics; Its purpose is to let the personage that is familiar with this technology can understand content of the present invention and implements; Can not limit protection scope of the present invention with this; All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (4)
1. a quiet power crossover femoral interlocking nail comprises the nail main body; It is characterized in that: the coronalplane of said nail body distal end is provided with the first slip lockhole and the 3rd slip lockhole; The sagittal plane of said nail body distal end is provided with the second slip lockhole and the 4th slip lockhole, and the said first slip lockhole, the second slip lockhole, the 3rd slip lockhole, the 4th slip lockhole are elongated hole; The end of said elongated hole is a circular arc; The length of said the 3rd slip lockhole is longer than the length of the first slip lockhole; The length of said the 4th slip lockhole is longer than the length of the second slip lockhole; The sagittal plane of said nail body distal end is provided with a locating platform; There is one the 3rd static(al) lockhole in the central authorities of said locating platform.
2. quiet power crossover femoral interlocking nail as claimed in claim 1 is characterized in that: the near-end of said nail main body is provided with the first static(al) lockhole and the second static(al) lockhole, and the said first static(al) lockhole and the second static(al) lockhole are arranged on orthogonal; The near-end and the sagittal plane of said nail main body laterally arrange.
3. quiet power crossover femoral interlocking nail as claimed in claim 1 is characterized in that: the length of the said first slip lockhole, the second slip lockhole, the 3rd slip lockhole, the 4th slip lockhole increases gradually.
4. quiet power crossover femoral interlocking nail as claimed in claim 1 is characterized in that: the parallel axes of the major axis of said elongated hole and said nail main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210293345 CN102835997A (en) | 2012-08-17 | 2012-08-17 | Static power exchange thighbone intramedullary nail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210293345 CN102835997A (en) | 2012-08-17 | 2012-08-17 | Static power exchange thighbone intramedullary nail |
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| CN102835997A true CN102835997A (en) | 2012-12-26 |
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| CN 201210293345 Pending CN102835997A (en) | 2012-08-17 | 2012-08-17 | Static power exchange thighbone intramedullary nail |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105997218A (en) * | 2016-06-29 | 2016-10-12 | 江苏艾迪尔医疗科技股份有限公司 | Humeral inverted intramedullary nail |
| CN108125712A (en) * | 2017-11-30 | 2018-06-08 | 中国人民解放军第七五医院 | A kind of novel femoral interlocking nail |
-
2012
- 2012-08-17 CN CN 201210293345 patent/CN102835997A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105997218A (en) * | 2016-06-29 | 2016-10-12 | 江苏艾迪尔医疗科技股份有限公司 | Humeral inverted intramedullary nail |
| CN108125712A (en) * | 2017-11-30 | 2018-06-08 | 中国人民解放军第七五医院 | A kind of novel femoral interlocking nail |
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Application publication date: 20121226 |