CN202568260U - Femur posterior condylar angle measuring device - Google Patents
Femur posterior condylar angle measuring device Download PDFInfo
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- CN202568260U CN202568260U CN 201120457444 CN201120457444U CN202568260U CN 202568260 U CN202568260 U CN 202568260U CN 201120457444 CN201120457444 CN 201120457444 CN 201120457444 U CN201120457444 U CN 201120457444U CN 202568260 U CN202568260 U CN 202568260U
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- China
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- pedestal
- femur
- posterior condylar
- strip
- scales
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Abstract
The utility model relates to a femur posterior condylar angle measuring device comprising a pedestal provided with scales. The pedestal is provided with a strip-shaped through hole in an axial direction, and two L-shaped scales, which can move along the strip-shaped through hole, are disposed in the strip-shaped through hole. The most protruding point on an inner side trench fundus of a femur far-end inner upper condyle and the most protruding point on an outer upper condyle can be found during the measurement, two feet of a vernier caliper are respectively used to clamp the two bony marks, and then a line parallel to a surgical epicondylar axis can be drawn towards the far-end surface of the femur along the femur mechanical axis direction. The pedestal of the measuring device can be disposed on the line parallel to the surgical epicondylar axis, then the scales disposed on two sides can be moved, and the two L-shaped scales can be respectively pulled to the farthest points of the inner and outer posterior condylar surfaces, then the distance 1 between the two scales, the distance h2 between the pedestal and the farthest point of the inner posterior condylar surface, and the distance h1 between the pedestal and the farthest point of the outer posterior condylar surface can be read. According to the trigonometric function, the posterior condylar angle can be obtained. The femur posterior condylar angle measuring device is especially suitable for the measurement of the femur posterior condylar angle during the operation, and can be used to solve the problem that the femur posterior condylar angle can not be directly measured during the operation.
Description
Technical field
This utility model relates to medical instruments field, relates in particular to a kind of femoral-posterior condyles angle measuring instrument.
Background technology
To cut bone rotation be a very important technology to line to femoral-posterior condyles in the TKA.The rotation malalignment can cause a series of complication, and wherein kneecap thigh complication is particularly outstanding.
Classical when using to line, when bone is cut in the gap, must the outward turning femoral prosthesis for obtaining harmonious flexing gap.Axle is one of main center of rotation of motion of knee joint on the surgery condyle, is kneed function axle, bends and stretches in the process in knee joint, and axle keeps vertical relation with tibia mechanics axle all the time on the surgery condyle.Axle provides a reliable method that is rotated line also can carry out the accurate location and the installation of femoral prosthesis on the surgery condyle.Axle is the line of external epicondyle of femur most salient point and the substrate of medial epicondyle medial sulcus on the surgery condyle, and axle is the line of the inside and outside epicondyle projecting point of femur on the clinical condyle, and the femoral-posterior condyles angle forms by axle on the surgery condyle and femoral-posterior condyles line are crossing.
At present; Main MRI and the CT of adopting measures the femoral-posterior condyles angle; During pathologic changes of knee joint such as femoral-posterior condyles is damaged when running into, condylus lateralis femoris dysplasia, condylus medialis femoris hypertrophy; Need to measure the femoral-posterior condyles angle once more in the art, and measure the femoral-posterior condyles angle in all inapplicable art of measuring method of employing MRI and CT.
The utility model content
This utility model is to provide a kind of measuring instrument that can in art, measure the femoral-posterior condyles angle.
The technical scheme of this utility model is following:
A kind of femoral-posterior condyles angle measuring instrument comprises and is with graduated pedestal that the axial location of said pedestal is provided with strip through-hole, is provided with two " L " shape scales that can move along strip through-hole in the strip through-hole.
As improvement, the scale on the said pedestal be located at strip through-hole above or below and parallel with strip through-hole.
As improvement, the strip through-hole on the said pedestal comprises two, and the centrage of two strip through-holes is on same straight line, and two scales lay respectively in two strip through-holes.
During measurement, find out DF medial epicondyle medial sulcus substrate B and lateral epicondyle most salient point A earlier, clamp this two bone property labellings respectively with the bipod of a slide gauge, draw the surgery condyle along femur mechanical axis direction in the DF surface on the axle parallel lines a.The measuring instrument pedestal is positioned on the surgery condyle on the axle a parallel lines, moves the both sides scale, respectively two " L " shape scales are pulled down to place, solstics, inside and outside postartis surface, then can read between two scales apart from l, pedestal and solstics, interior postartis surface are apart from being h
2, pedestal is h with solstics, outer postartis surface distance
1, tangent value tg α=(h of postartis angle α then
2-h
1)/l, the utilization trigonometric function calculates postartis angle α=arctan (h
2-h
1)/l.
The measuring instrument at this femoral-posterior condyles angle is simple in structure, and it is very convenient to operate, and measures accurately, is particularly suited for measuring the femoral-posterior condyles angle in the art, has solved the difficult problem that can't directly measure the femoral-posterior condyles angle in the art.
Description of drawings
Fig. 1 is this utility model front view;
Fig. 2 is the upward view of Fig. 1;
Fig. 3 is the right view of Fig. 1;
Fig. 4 is the measuring principle figure of this utility model;
Wherein: 1 is pedestal, and 2 is scale, and 3 is strip through-hole, and A is the lateral epicondyle most salient point; B is the substrate of medial epicondyle medial sulcus, and C is solstics, outer postartis surface, solstics, postartis surface distance in the D; The a line is the parallel lines of axle on the surgery condyle, and b is the postartis line, and α is the postartis angle.
The specific embodiment
Further specify this utility model below in conjunction with accompanying drawing.
Referring to Fig. 1, Fig. 2 and Fig. 3, this utility model comprises is with graduated pedestal 1, the axial location of pedestal 1 to be provided with two strip through-holes 3 of centrage on same straight line, the scale on the pedestal be located at strip through-hole 3 above or below and parallel with strip through-hole., all contain the scale of " L " shape that can move along strip through-hole 3 in each strip through-hole.
Referring to Fig. 4; During measurement; Find out DF medial epicondyle medial sulcus substrate B and lateral epicondyle most salient point A earlier, clamp this two bone property labellings respectively with the bipod of a slide gauge, draw the surgery condyle along femur mechanical axis direction in the DF surface on the axle parallel lines a.The measuring instrument pedestal is positioned on the surgery condyle on the axle a parallel lines, moves the both sides scale, respectively two " L " shape scales are pulled down to place, solstics, inside and outside postartis surface, then can read between two scales apart from l, pedestal and solstics, interior postartis surface are apart from being h
2, pedestal is h with solstics, outer postartis surface distance
1, tangent value tg α=(h of postartis angle α then
2-h
1)/l, the utilization trigonometric function calculates postartis angle α=arctan (h
2-h
1)/l.
The measuring instrument at this femoral-posterior condyles angle is simple in structure, and it is very convenient to operate, and measures accurately, is particularly suited for measuring in the art femoral-posterior condyles angle.
Claims (3)
1. femoral-posterior condyles angle measuring instrument; It is characterized in that comprising and be with graduated pedestal (1); The axial location of said pedestal (1) is provided with strip through-hole (3), and being provided with in the strip through-hole (3) can be along mobile two " L " shape scale (2) of strip through-hole (3).
2. femoral-posterior condyles angle measuring instrument according to claim 1, it is characterized in that scale on the said pedestal (1) be located at strip through-hole (3) above or below and parallel with strip through-hole (3).
3. femoral-posterior condyles angle measuring instrument according to claim 1 and 2; It is characterized in that the strip through-hole (3) on the said pedestal (1) comprises two; The centrage of two strip through-holes is on same straight line, and two scales (2) lay respectively in two strip through-holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457444 CN202568260U (en) | 2011-11-18 | 2011-11-18 | Femur posterior condylar angle measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457444 CN202568260U (en) | 2011-11-18 | 2011-11-18 | Femur posterior condylar angle measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202568260U true CN202568260U (en) | 2012-12-05 |
Family
ID=47237723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120457444 Expired - Fee Related CN202568260U (en) | 2011-11-18 | 2011-11-18 | Femur posterior condylar angle measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202568260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104398321A (en) * | 2014-10-27 | 2015-03-11 | 中国人民解放军第二军医大学 | Two-dimensional survey meter for condyles on inner and outer sides of thighbone |
-
2011
- 2011-11-18 CN CN 201120457444 patent/CN202568260U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104398321A (en) * | 2014-10-27 | 2015-03-11 | 中国人民解放军第二军医大学 | Two-dimensional survey meter for condyles on inner and outer sides of thighbone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20131118 |