CN203634270U - Lateral bending rotation-preventing intramedullary nail used at near end of thigh bone - Google Patents
Lateral bending rotation-preventing intramedullary nail used at near end of thigh bone Download PDFInfo
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- CN203634270U CN203634270U CN201320821623.6U CN201320821623U CN203634270U CN 203634270 U CN203634270 U CN 203634270U CN 201320821623 U CN201320821623 U CN 201320821623U CN 203634270 U CN203634270 U CN 203634270U
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- main nail
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- lateral bending
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Abstract
The utility model discloses a lateral bending rotation-preventing intramedullary nail used at the near end of a thigh bone. The lateral bending rotation-preventing intramedullary nail comprises a main nail. The main nail comprises a first main nail section and a second main nail section. One end of the first main nail section is provided with a main nail tail cap. The other end of the first main nail section is connected with the second main nail section. The first main nail section is provided with a first lock nail hole. The second main nail section is provided with a second lock nail hole. A first lock nail is inserted into the first lock nail hole. A second lock nail is inserted into the second lock nail hole. The first lock nail and the second lock nail are located on the same common plane. The included angle of the projection of the first main nail section on the common plane and the projection of the second main nail section on the common plane ranges from 173 degrees to 175 degrees. The lateral bending rotation-preventing intramedullary nail is perpendicular to the common plane, and the plane where the first main nail section is located is a perpendicular plane. The projection of the main nail on the perpendicular plane is in an arc shape, the length of the arc ranges from 170 millimeters to 420 millimeters, and the angle of the arc ranges from 6.5 degrees to 11.5 degrees. The portion, implanted to a thigh bone marrow cavity, of the lateral bending rotation-preventing intramedullary nail can adapt to the anatomic shape of the thigh bone better.
Description
Technical field
This utility model relates to medical instruments field, more specifically relates to a kind of lateral bending type near end of thighbone and prevents revolving intramedullary pin, is applicable near end of thighbone, fracture of shaft of femur operation.
Background technology
At present, there is fracture in the situation that near end of thighbone, generally can use that near end of thighbone is anti-revolves fixing that intramedullary pin fractures.The two ends implantable bioartificial compatibility by fracture line near end of thighbone spongy bone and pulp cavity is good, inner matter-intramedullary pin that intensity is high, not only can reach the connection of fracture and fixing, to build union of fracture basis, the object that promotes union of fracture, and can treat the effect that carry out in early days functional exercise, accelerate animal economy recovery, near end of thighbone prevents that revolving intramedullary pin (PFNA) has been widely used in clinical practice at present.
But the anti-intramedullary pin that revolves of near end of thighbone at present, in technical standard, its shape is only the form adaptation at a plane and near end of thighbone and pulp cavity, not adaptive with the form of actual near end of thighbone pulp cavity in another one plane, make it in application process, easily cause the postoperative complication that some are unnecessary, and limited the extension of its range of application.
Utility model content
The purpose of this utility model is the problems referred to above that are for prior art existence, provides a kind of lateral bending type near end of thighbone to prevent revolving intramedullary pin, and the part in implanted femur pulp cavity is better adapted to femur anatomic form.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
The anti-intramedullary pin that revolves of a kind of lateral bending type near end of thighbone, comprise main nail, described main nail comprises one section of main nail and main nail two-stage nitration, one end that main nail is one section is provided with main nail tail cap, the other end that main nail is one section is connected with main nail two-stage nitration, on one section of main nail, offer the first locking nail hole, on main nail two-stage nitration, offer the second locking nail hole, in the first locking nail hole, be inserted with the first pinning, in the second locking nail hole, be inserted with the second pinning, the first pinning and the second pinning are positioned at same common plane, and the angle of one section of main nail and the projection of main nail two-stage nitration on common plane is 173-175 degree.
Plane perpendicular to common plane and one section of place of main nail is vertical plane, described main nail on a vertical plane be projected as arc, arc length is 170-420mm, the angle of arc is 6.5-11.5 degree.
One section of main nail as above and main nail two-stage nitration are hollow.
The external diameter that main nail as above is one section is greater than the external diameter of main nail two-stage nitration, and one end of the first described pinning is provided with screw blade.
On the side position of standard anatomical structure, stretching in side femur epimere cortical bone medial border tangent line and middle hypomere cortical bone medial border tangent line not on same straight line, and intersect with angle (172.2 ± 2.2) degree.Although femur most proximal end does not have pulp cavity, the extended line of femoral bone cavitas medullaris axis almost overlaps with greater trochanter of femur summit.Take above-mentioned femur anatomical structure as foundation, revolve intramedullary pin (PFNA) by anti-existing near end of thighbone, on side view, main nail Integral bending, main nail arc length is 170-420mm, the angle of the arc of the main nail of arc is (9 ± 2.5) degree.
This utility model compared with prior art, has the following advantages:
1, due to consistent with femoral bone cavitas medullaris anatomic form on side position, will be very smooth in the anti-process of revolving the main nail of intramedullary pin of Operation lateral bending type near end of thighbone, can avoid occurring violence implantation.
2,, due to consistent with femoral bone cavitas medullaris anatomic form on side position, can avoid the anti-distal tip top that may occur in the main nail implantation process of intramedullary pin of revolving of original near end of thighbone to be pressed in and on femoral shaft antetheca, to add that violence implants fracture of shaft of femur or the postoperative thigh pain causing.
3,, due to consistent with femoral bone cavitas medullaris anatomic form on side position, can avoid the anti-main nail distortion of revolving in the main nail violence of intramedullary pin implantation process of former near end of thighbone, and then cause the distortion of distal locking nail hole or displacement and affect inserting of distal locking nail.
4,, due to consistent with femoral bone cavitas medullaris anatomic form on side position, the anti-length of revolving the main nail of intramedullary pin of lateral bending type near end of thighbone can lengthen, and even to femoral bone cavitas medullaris total length, will can be applicable to fracture of shaft of femur and femur multiple fracture, has increased its range of application.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present utility model;
Fig. 2 is the position view of main apparent direction of the present utility model in femur;
Fig. 3 is side-looking structural representation of the present utility model;
Fig. 4 is the position view of side-looking direction of the present utility model in femur.
In figure: the main nail of 1-; One section of the main nail of 101-; The main nail two-stage nitration of 102-; The main nail tail of 103-cap; 2-the first pinning; 201-screw blade; 3-the second pinning; 4-the first locking nail hole; 5-the second locking nail hole; 6-centrage; 7-femur.
The specific embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail.
As shown in Fig. 1 ~ 4, the anti-intramedullary pin that revolves of a kind of lateral bending type near end of thighbone, comprise main nail 1, described main nail 1 comprises a section 101 of main nail and main nail two-stage nitration 102, one end that main nail is one section 101 is provided with main nail tail cap 103, the other end that main nail is one section 101 is connected with main nail two-stage nitration 102, on one section 101 of main nail, offer the first locking nail hole 4, on main nail two-stage nitration 102, offer the second locking nail hole 5, in the first locking nail hole 4, be inserted with the first pinning 2, in the second locking nail hole 5, be inserted with the second pinning 3, the first pinning 2 and the second pinning 3 are positioned at same common plane, the angle of one section 101 of main nail and the projection of main nail two-stage nitration 102 on common plane is 173-175 degree.
Plane perpendicular to common plane and one section of 101 place of main nail is vertical plane, described main nail 1 on a vertical plane be projected as arc, arc length is 170-420mm, the angle of arc is 6.5-11.5 degree.
One section 101 of main nail and main nail two-stage nitration 102 are hollow.
The external diameter that main nail is one section 101 is greater than the external diameter of main nail two-stage nitration 102, and one end of the first described pinning 2 is provided with screw blade 201.
In use, electric drill connects guide pin to this utility model, pierces guide pin near end of thighbone and pulp cavity from greater trochanter of femur summit.Hollow opening drill, is inserted in guide pin and expands near end of thighbone and pulp cavity along guide pin direction burr.After expansion marrow, on guide pin, cover is become owner of nail 1 and is comprised a section 101 of main nail and main nail two-stage nitration 102 along the direction expanding after marrow to the main nail 1(of distal femur insertion) near end of thighbone and pulp cavity.X-ray machine perspective, after determining that the position of main nail 1 in femur and the degree of depth meet the requirements, connect the first pinning 2 aiming arms and sleeve to lateral side of femur cortex, lean forward consistent with anteversion of femoral neck, in femoral head neck, pierce guide pin by the first locking nail hole 4 on one section 101 of main nail, after X-ray machine perspective determines that the position of this guide pin in femoral head neck and the degree of depth meet the requirements; On guide pin, be inserted in the first pinning 2, in femoral head neck, enter to squeeze into the first pinning 2 with screw blade 201 by the first locking nail hole 4 on one section 101 of main nail.The second pinning 3 aiming arms and drill holder are installed to cortex outside femoral shaft, drill bit boring is penetrated side seam matter inside and outside femur, is measured after length by the second locking nail hole 5 on main nail two-stage nitration 102, is screwed into the second pinning 3 by the second locking nail hole 5 on main nail two-stage nitration 102.Finally be screwed into main nail tail cap 103 at main nail 1 tail end.
Specific embodiment described herein is only to the explanation for example of this utility model spirit.This utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (4)
1. the anti-intramedullary pin that revolves of lateral bending type near end of thighbone, comprise main nail (1), it is characterized in that, described main nail (1) comprises main nail one section of (101) and main nail two-stage nitration (102), one end of main nail one section (101) is provided with main nail tail cap (103), the other end of main nail one section (101) is connected with main nail two-stage nitration (102), main nail offers the first locking nail hole (4) on one section (101), on main nail two-stage nitration (102), offer the second locking nail hole (5), in the first locking nail hole (4), be inserted with the first pinning (2), in the second locking nail hole (5), be inserted with the second pinning (3), the first pinning (2) and the second pinning (3) are positioned at same common plane, the angle of main nail one section (101) and the projection of main nail two-stage nitration (102) on common plane is 173-175 degree.
2. the anti-intramedullary pin that revolves of a kind of lateral bending type near end of thighbone according to claim 1, it is characterized in that, plane perpendicular to common plane and one section of (101) place of main nail is vertical plane, described main nail (1) on a vertical plane be projected as arc, arc length is 170-420mm, and the angle of arc is 6.5-11.5 degree.
3. a kind of lateral bending type near end of thighbone according to claim 1 is anti-revolves intramedullary pin, it is characterized in that, described main nail one section (101) and main nail two-stage nitration (102) are hollow.
4. the anti-intramedullary pin that revolves of a kind of lateral bending type near end of thighbone according to claim 3, it is characterized in that, the external diameter of described main nail one section (101) is greater than the external diameter of main nail two-stage nitration (102), and one end of described the first pinning (2) is provided with screw blade (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320821623.6U CN203634270U (en) | 2013-12-12 | 2013-12-12 | Lateral bending rotation-preventing intramedullary nail used at near end of thigh bone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320821623.6U CN203634270U (en) | 2013-12-12 | 2013-12-12 | Lateral bending rotation-preventing intramedullary nail used at near end of thigh bone |
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| Publication Number | Publication Date |
|---|---|
| CN203634270U true CN203634270U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320821623.6U Expired - Fee Related CN203634270U (en) | 2013-12-12 | 2013-12-12 | Lateral bending rotation-preventing intramedullary nail used at near end of thigh bone |
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| CN (1) | CN203634270U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887303A (en) * | 2015-06-29 | 2015-09-09 | 北京贝思达生物技术有限公司 | PFNA (proximal femoral nail anti-rotation) intramedullary nail |
| CN108030574A (en) * | 2018-01-11 | 2018-05-15 | 四川大学华西医院 | Proximal femur assembling prosthesis with anti-rotation blade |
-
2013
- 2013-12-12 CN CN201320821623.6U patent/CN203634270U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887303A (en) * | 2015-06-29 | 2015-09-09 | 北京贝思达生物技术有限公司 | PFNA (proximal femoral nail anti-rotation) intramedullary nail |
| CN108030574A (en) * | 2018-01-11 | 2018-05-15 | 四川大学华西医院 | Proximal femur assembling prosthesis with anti-rotation blade |
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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 |
Granted publication date: 20140611 Termination date: 20141212 |
|
| EXPY | Termination of patent right or utility model |