CN203598035U - Dynamic hip screw with movable sleeve - Google Patents
Dynamic hip screw with movable sleeve Download PDFInfo
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- CN203598035U CN203598035U CN201320818127.5U CN201320818127U CN203598035U CN 203598035 U CN203598035 U CN 203598035U CN 201320818127 U CN201320818127 U CN 201320818127U CN 203598035 U CN203598035 U CN 203598035U
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- screw
- sleeve
- main
- hole
- nail
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Abstract
A dynamic hip screw with a movable sleeve is composed of a main screw body, the sleeve, locking parts and a plurality of bone fracture plates of different included angles, wherein the main screw body is composed of a hollow head portion and a rod portion; the head portion is in a spiral cutter shape; the section of the rod portion is a distorted oval; an inner thread is arranged at the end of a through hole of the tail portion of the rod portion; the inner wall of the sleeve is a distorted oval; knurls or grooves are formed in the outer wall of the sleeve; the locking parts comprise a locking bolt of the sleeve and a pressurized tail nail for fixing the main screw body; one end of each bone fracture plate is a streamline acute edge; a main screw hole, an auxiliary screw hole, a locking hole, a temporary fixing hole and a temporary fixing groove are formed in the broadside; the shoulder portion is provided with a sleeve locking through hole; the included angle between each bone fracture plate and the outer wall of the sleeve is less than or equal to 90 degrees. A main nail, the sleeve and the bone fracture plates can be connected together in the minimally invasive operation through the movable sleeve; as the streamline acute edge at the far end of each bone fracture plate and the temporary fixation of the far end and the near end are adopted, the minimally invasive operation can be finished outside the skin, and operation wounds are reduced; through the technical scheme of dual fixation of the main nail and an auxiliary nail on screw blades, the rotation resistance function is more stable.
Description
Technical field
This utility model relates to a kind of Orthopeadic Surgery medical device, especially a kind of for active sleeve power coxa screw nail fixing in fractured near end of thighbone.
Background technology
In prior art, the goldstandard of internationally recognized operative treatment stable type intertrochanteric fracture of the femur is still dynamic hip screw (Dynamic Hip Screw is called for short DHS).But because its sleeve is fixed structure, in use causing can not Micro-operation; And only have one piece of main pulling force screw, single nail is fixing, the not anti-rotational function of tool, cannot treat greater trochanter coronalplane has the case of fracture; Especially in osteoporotic gerontal patient, mortality is higher.Its sleeve enters sclerotin place, and it is also one of reason of interior solid failure that lateral side of femur bone amount is destroyed greatly.
Applicant formerly patent (ZL200620009443.8) has solved above shortcoming well: change fixed muffle into quill, reduced lateral side of femur cortex osteoclasia, make Micro-operation become possibility; Add again with one piece of auxiliary nail, effectively increased rotational stabilization.
In clinical medicine practice subsequently, we have found that again it also has some shortcomings: main oncomelania stricture of vagina head end is not suitable for osteoporotic old man patient; Main nail bar portion circular design is unfavorable for increasing rotational stabilization; The external screw thread of quill is difficult for tightening in the time that blade plate is combined; Blade plate is combined with femoral shaft and is fixedly unfavorable for the protection of periosteum blood fortune with plain screw.
So we have carried out larger continuation improvement to it, to overcome above-mentioned deficiency.
Utility model content
Goal of the invention of the present utility model is a kind of modified model active sleeve power coxa screw nail that is enough to overcome above-mentioned defect of development.
It is mainly made up of main screw assembly and bone plate group, it is characterized in that:
Described main screw assembly comprises, the main body of screw, main screw sleeve and main screw sleeve locking part;
The described main body of screw, is made up of head and bar portion two parts of integral hollow, and main screw head profile is circular knife shape, main shank of screw portion abnormal shape, and its cross section is the ellipse of distortion, and upper and lower two ends are corresponding circular arcs, and another both sides are set to straight line;
Described main screw sleeve, the shape of its inwall is set to the indicatrix ellipse with main shank of screw portion outer wall form fit, and its outer wall surface is set to annular knurl or groove;
Described main screw sleeve locking part is the locking stove bolt through the fixing main screw sleeve of blade plate shoulder through hole;
Described blade plate one end is streamlined sharp-edged, and its wide face is provided with main screw hole, auxiliary screw hole, multiple lock holes, temporary fixed hole and temporary fixed groove; Lock hole is inclined hole, tilts 10～30 ° to blade plate bottom side; Be provided with two sleeve locking through holes at blade plate shoulder, the angle of this through hole and main screw sleeve outer wall is≤90 °, through locking stove bolt, sleeve and blade plate is fixed.
Above-mentioned active sleeve power coxa screw nail, is characterized in that described bone plate group, includes the sleeve locking through hole of blade plate shoulder and is the blade plate of the different angles of polylith of 120～150 ° from the angle of main screw sleeve outer wall.
The utlity model has following beneficial effect:
The one, owing to having adopted the technical scheme of quill, thereby realize in Micro-operation process and can complete easily linking together between main nail, sleeve, blade plate of task, because fixedly changing screw thread into locking stove bolt fixes sleeve and blade plate, make operation more smooth, and eliminated the misgivings of drill bit destruction screw thread;
The 2nd, owing to having adopted the streamlined sharp-edged of far-end and the temporary fixed technical scheme of far and near end, all operations can Wicresoft be completed outside skin, so there is the feature of further minimizing operation wound;
The 3rd, owing to having taked the fixing technical scheme of the two nails of main nail and auxiliary nail, and main nail changes screw blade design into by screw thread design, so have more stable anti-spinfunction.
Accompanying drawing explanation
Fig. 1 is this utility model overall structure schematic diagram;
Fig. 2 is the structural representation of main nail and main nail sleeve assembled state;
Fig. 3 is that the A of Fig. 2 is to structural representation;
Fig. 4 is main pin structure form schematic diagram;
Fig. 5 is that the A of Fig. 4 is to structural representation;
Fig. 6 is main nail tube-in-tube structure form schematic diagram;
Fig. 7 is that the A of Fig. 6 is to structural representation;
Fig. 8 is the side view of blade plate;
Fig. 9 is the front view of blade plate.
The specific embodiment
Further elaboration in conjunction with the accompanying drawings and embodiments:
In Fig. 1, the main head of screw of 1-1; The main shank of screw of 1-2; 2 main screw sleeves; 3 blade plates; 13 pressurization tail nails;
In Fig. 2, the main head of screw of 1-1 (circular knife shape); The main shank of screw of 1-2, bar portion cross section is the ellipse of distortion, and upper and lower two ends are corresponding circular arcs, and another both sides were improved to as straight line along the camber line of transverse both sides originally;
In Fig. 3, the main shank of screw of 1-2; The main screw through hole of 1-3; 2 main screw sleeves;
In Fig. 4, the main head of screw of 1-1 (circular knife shape); The main shank of screw of 1-2;
In Fig. 5, the main shank of screw of 1-2; The main screw through hole of 1-3;
In Fig. 6,2 main screw sleeves;
In Fig. 7,2 main screw sleeves; The main screw sleeve of 2-3 through hole;
In Fig. 8,4 auxiliary screw holes; 6 main screw sleeve lock holes; 7 main screw sleeve holes; 8 diopter connecting holes; 9 stream money type sharp-edgeds;
In Fig. 9,4 auxiliary screw holes; 5 blade plate shoulders; 6 main screw sleeve lock holes; 7 main screw sleeve holes; 10 lock holes; The temporary fixed groove of 11 far-end; 12 temporary fixed holes.
Applicating example:
On the blade plate that is streamlined sharp-edged at its far-end, have successively the temporary fixed hole of near-end, auxiliary nail hole, be main nail hole, screw hole, the temporary fixed groove of far-end of angle with blade plate from near-end to far-end.On blade plate, female thread is cancelled in main nail hole, and sleeve outer surface changes groove or annular knurl design into, by locking stove bolt, sleeve and blade plate is fixed.Blade plate screwing hole changes lock hole into, and tilts 10 degree to 30 degree to offside, fixes so that screw interval intersects, and increases constant intensity, plays the operation of not disturbing main nail, auxiliary nail on external diopter simultaneously.Sleeve lining and main nail bar portion all adopt indicatrix ellipse design (similar two figures that short ∩ shape peristomes docking forms), to increase rotational stabilization.Main nail head adopts circular knife chip, to adapt to old people with osteoporosis, has not only protected sclerotin but also increased rotational stabilization.Described bone plate group, refers to the multiple bone plate group in angle between blade plate and main nail hole is between 120 °～150 °.Owing to having taked technique scheme, while using this utility model, choose according to actual needs the blade plate of proper angle, cut the skin incision of 2～4 ㎝ near end of thighbone, after separating muscle, blade plate being pasted to bone along streamlined sharp-edged slides, by the temporary fixed hole of near-end and the temporary fixed groove of far-end, blade plate is temporary fixed, in main nail hole on blade plate, squeeze into main nail guide pin, after drilling and tapping, knock in main screw and main screw sleeve, by the locking stove bolt on blade plate, sleeve and blade plate are fixed, through screw hole fixation bone fracture plate, be screwed into pressurization tail nail and make fracture with compressive, it is complete operation process that auxiliary nail is parallel to after main nail is squeezed into.
This active sleeve power coxa screw nail, not only there is static(al) and dynamic pressurized function, have main nail, sleeve, blade plate in Micro-operation simultaneously and be easy to combination, low, the anti-rotational stabilization of operation wound is strong, be specially adapted to the advantage that osteoporotic fracture, fixing reliable, all operation techniques all can Wicresoft's skin complete outward.
Through practice, satisfactorily reach goal of the invention of the present utility model.
Claims (2)
1. an active sleeve power coxa screw nail, is mainly made up of main screw assembly and bone plate group, it is characterized in that:
Described main screw assembly comprises, the main body of screw, main screw sleeve and locking part;
The described main body of screw, is made up of head and bar portion two parts of integral hollow, and main screw head profile is circular knife shape, main shank of screw portion abnormal shape, and its cross section is the ellipse of distortion, and upper and lower two ends are corresponding circular arcs, and another both sides are set to straight line; Main shank of screw afterbody through hole end arranges the female thread mating with pressurization tail nail external screw thread;
Described main screw sleeve, the shape of its inwall is set to the indicatrix ellipse with main shank of screw portion outer wall form fit, and its outer wall surface is set to annular knurl or groove;
Described locking part comprises:
1. fix the locking stove bolt of main screw sleeve through blade plate shoulder through hole;
2. follow closely through the pressurization tail of the fixing main screw of main shank of screw afterbody through hole end;
Described blade plate one end is streamlined sharp-edged, and its wide face is provided with main screw hole, auxiliary screw hole, multiple lock holes, temporary fixed hole and temporary fixed groove; Lock hole is inclined hole, tilts 10～30 ° to blade plate bottom side; Be provided with two sleeve locking through holes at blade plate shoulder, the angle of this through hole and main screw sleeve outer wall is≤90 °, through locking stove bolt, sleeve and blade plate is fixed.
2. according to active sleeve power coxa screw nail claimed in claim 1, it is characterized in that described bone plate group, include the sleeve locking through hole of blade plate shoulder and be the blade plate of the different angles of polylith of 120～150 ° from the angle of main screw sleeve outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320818127.5U CN203598035U (en) | 2013-12-12 | 2013-12-12 | Dynamic hip screw with movable sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320818127.5U CN203598035U (en) | 2013-12-12 | 2013-12-12 | Dynamic hip screw with movable sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203598035U true CN203598035U (en) | 2014-05-21 |
Family
ID=50710745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320818127.5U Expired - Fee Related CN203598035U (en) | 2013-12-12 | 2013-12-12 | Dynamic hip screw with movable sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203598035U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105640629A (en) * | 2016-03-17 | 2016-06-08 | 欧阳晓 | Perfusion biological intramedullary fixation device for osteoporotic proximal femoral fracture |
| CN107223040A (en) * | 2014-05-09 | 2017-09-29 | 萨维奇医疗设计有限责任公司 | Medullary fixation device and system in hipbone and femoral fracture operation |
-
2013
- 2013-12-12 CN CN201320818127.5U patent/CN203598035U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107223040A (en) * | 2014-05-09 | 2017-09-29 | 萨维奇医疗设计有限责任公司 | Medullary fixation device and system in hipbone and femoral fracture operation |
| CN107223040B (en) * | 2014-05-09 | 2020-11-24 | 萨维奇医疗设计有限责任公司 | Intramedullary fixation device and system for use in hip and femur fracture surgery |
| CN105640629A (en) * | 2016-03-17 | 2016-06-08 | 欧阳晓 | Perfusion biological intramedullary fixation device for osteoporotic proximal femoral fracture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20181212 |