CN207356110U - T-shaped positioning rule outside a kind of knee prosthesis marrow - Google Patents
T-shaped positioning rule outside a kind of knee prosthesis marrow Download PDFInfo
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- CN207356110U CN207356110U CN201720314346.8U CN201720314346U CN207356110U CN 207356110 U CN207356110 U CN 207356110U CN 201720314346 U CN201720314346 U CN 201720314346U CN 207356110 U CN207356110 U CN 207356110U
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- positioning rule
- femur
- knee prosthesis
- mechanical axis
- marrow
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Abstract
The utility model is T-shaped positioning rule outside a kind of knee prosthesis marrow, the positioning rule being connected including femur mechanical axis locating rod and with the femur mechanical axis locating rod square crossing, the positioning rule are included using femur mechanical axis the locating rod first positioning rule section and second positioning rule section at least partly symmetrical as symmetry axis.The utility model positioning rule structure energy fast positioning simultaneously finds the mechanical axis of femur, and its positioning is quick, precision is high, easy to operate, safe, simple in structure, reliability is high, cost is low.
Description
Technical field
It the utility model is related to the field of medical instrument technology, and in particular to T-shaped positioning rule outside a kind of knee prosthesis marrow.
Background technology.
With modern prosthetic design and manufacturing technology rapid development, knee replacements are opened extensively in worldwide
Exhibition.Accurate lower limb and the prosthese line of force are recovered to be considered as one of successful key of total knee arthroplasty, at present distal femur
Osteotomy mainly has positioning in marrow, is positioned outside marrow, area of computer aided positioning.Positioning is relatively accurate in marrow, but increases bleeding, fat embolism
The complication such as plug, it is impossible to be used in deformity, the femur of pulp cavity locking.Positioned outside marrow with mostly fixed with distal femur bone mark
Position, error is larger, the gradually application such as computer navigation auxiliary total knee replacement positioning in recent years, individuation customization osteotomy module
In clinic, the accuracy of operation can be improved to a certain extent.But there are expensive, operating time length, increase for these methods
Patients'perioperative infection rate；Meanwhile the utilization of computer assisted navigation easily increases risk of bone fracture in surgical procedure,
Especially for sufferers of osteoporosis face.It must be one-time fixed in place in surgical procedure, avoid patient from repeating fixed, learning curve
The shortcomings of long, also fail in wide clinical application at present.
Utility model content
The purpose of the utility model is to overcome problem existing in the prior art, there is provided T-shaped outside a kind of knee prosthesis marrow
Positioning rule.
To realize above-mentioned technical purpose and the technique effect, the utility model is achieved through the following technical solutions：
T-shaped positioning rule outside a kind of knee prosthesis marrow, including femur mechanical axis locating rod and with the femur mechanical axis
The positioning rule of locating rod square crossing connection, the positioning rule are included using femur mechanical axis locating rod as symmetry axis at least part phase
Mutual symmetrical first positioning rule section and the second positioning rule section.
Further, the first positioning rule section and the second positioning rule section are equipped with fixed structure.
Further, the fixed structure includes being distributed in some concentric in the first positioning rule section and the second positioning rule section
Location hole, the concentric locating hole are used to follow one bone label hole, overlap both centers of circle.
Further, the femur index aperture for one in fossa intercondylaris femoris fornix portion's central point along femur longitudinal axis near-end
The hole of the 2mm-4mm bored at 10mm-40mm.
Further, further include includes one with the matched auxiliary fixing structure of fixed structure, the auxiliary fixing structure
Hollow circular cylinder, the hollow circular cylinder stretch into concentric locating hole and mutually form homocentric secure fit, the hollow circuit cylinder
It is equipped with a circular protrusion external week, forms a mounting hole groove between the body of rod around the circular protrusion and concentric locating hole, just
Clamped with one heart in corresponding clamping device, prevent from slipping so that have what is relatively rotated between hollow circular cylinder and clamping device
The free degree, does not make horizontal, vertical displacement.
Further, some concentric locating holes are equidistantly set in the first positioning rule section and the second positioning rule section
Put.
Further, the femur mechanical axis locating rod is equipped with the locating slot along its bar length direction.
The beneficial effects of the utility model are:
The utility model structure only need to arbitrarily take patient's lower limb abduction or two location points in interior time receiving, complete one with stock
Line is the natural isosceles triangle on base when bone center is vertex, femoral intercondylar index aperture abduction, interior receipts position, this practicality is new
Type positioning rule can form the isosceles triangle that a base can change, and the base of the isosceles triangle that can change can be with
The base of natural isosceles triangle overlaps, during coincidence, femur mechanical axis locating rod among positioning rule necessarily with by femoral head
Heart point coincides for the bisector of the isosceles triangle on vertex, and the femur mechanical axis locating rod extended line among positioning rule necessarily leads to
Late-segmental collapse point is crossed, the position of femur mechanical axis locating rod is the mechanical axis of femur at this time, it is positioned, and quick, precision is high,
It is easy to operate, safe, simple in structure, reliability is high, cost is low.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model positioning rule；
Fig. 2 is the auxiliary fixing structure stereogram of the utility model.
Fig. 3 is the auxiliary fixing structure front view of the utility model.
Fig. 4 is the auxiliary fixing structure of the utility model and the matching chart of clamping device.
Fig. 5 is at first concentric locating hole calibration of the utility model positioning rule.
Fig. 6 is at second concentric locating hole calibration of the utility model positioning rule.
Fig. 7 is at the positioning of the femur mechanical axis locating rod of the utility model positioning rule.
Fig. 8 is the positioning schematic of the utility model positioning rule.
Figure label explanation：1st, femur mechanical axis locating rod, 11, locating slot, 2, positioning rule, the 21, first positioning rule section,
22nd, the second positioning rule section, 3, concentric locating hole, 4, nest fornix portion central point, 5, femur, 6, hollow circular cylinder, 61, ring-type dashes forward
Rise, 62, mounting hole groove, 7, universal connection rod, 8, folder with one heart.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in detail.
With reference to shown in Fig. 1, including femur mechanical axis locating rod 1 and with 1 square crossing of femur mechanical axis locating rod
The positioning rule 2 of connection, the positioning rule 2 are included with femur mechanical axis locating rod 1 for symmetry axis at least partly symmetrical the
One positioning rule section 21 and the second positioning rule section 22.
The first positioning rule section 21 and the second positioning rule section 22 are equipped with fixed structure, for fixing the first positioning rule section
21 or the second positioning rule section 22, it there was only the free degree in ruler Plane Rotation direction.
The fixed structure includes some concentric locatings being distributed in the first positioning rule section 21 and the second positioning rule section 22
Hole 3, the concentric locating hole 3 are used to follow one bone label hole, overlap both centers of circle
The femur index aperture for one in fossa intercondylaris femoris fornix portion central point 4 along at 5 longitudinal axis near-end 10mm-40mm of femur
The hole of the 2mm-4mm bored, in specific operation, can finely tune femur according to the specification of used positioning rule size
The position of index aperture.
With reference to shown in Fig. 2 and Fig. 4, further include and the matched auxiliary fixing structure of fixed structure, the auxiliary fixed knot
Structure includes a hollow circular cylinder 6, and the hollow circular cylinder 6 stretches into concentric locating hole 3 and mutually forms homocentric secure fit, institute
State 6 periphery of hollow circular cylinder and be equipped with a circular protrusion 61, formed between the body of rod around the circular protrusion 61 and concentric locating hole 3
One mounting hole groove 62, clamps with one heart easy to corresponding clamping device, prevents from slipping so that hollow circular cylinder 6 and clamping device
Between there is the free degree relatively rotated, do not make horizontal, vertical displacement, in the present embodiment, with continued reference to described in Fig. 4, clamping
The concentric folder 8 that instrument is equipped with using universal connection rod 7 and its head, presss from both sides 8 and is clamped at mounting hole groove 62, with one heart with one heart
Folder 8 keeps relatively rotating with hollow circular cylinder 6 in clamping, so as to keep 6 axle center of hollow circular cylinder in the circle of femur index aperture
The heart rotates.
Some concentric locating holes 3 spaced set in the first positioning rule section 21 and the second positioning rule section 22, from
And make it that scale is played the role of in several concentric locating holes 3 at the same time, easy to observe position of the suffering limb in positioning rule 2.
The femur mechanical axis locating rod 1 is equipped with the locating slot 11 along its bar length direction.
The utility model action process and principle
When being positioned in the utility model：
1. with reference to 21 side of the first positioning rule section that suffering limb shown in Fig. 5, is first moved to positioning rule 2, i.e. the right in Fig. 5,
Tiptoe is facing forward, and in fossa intercondylaris femoris fornix portion, 4 near-end of central point bores the femur mark of an about 3mm along 5 longitudinal axis of femur about at 15mm
Hole, and a concentric locating hole 3 in the first positioning rule section 21 is overlapped with the center of circle of femur index aperture, and performed the operation with being fixed on
The concentric folder 8 of the common universal connection rod 7 of bed clamps the concentric mounting hole 3, fixes universal connection rod 7；
2. with reference to shown in Fig. 6, suffering limb is moved again, at the same it is concentric to be clamped in the first positioning rule section 21 by folder 8 with one heart
Mounting hole 3 is center of circle rotational positioning ruler 2, makes a concentric locating hole 3 in the second positioning rule section 22 of positioning rule 2 and femur mark
Remember that the center of circle in hole overlaps, while the concentric locating hole 3 for ensuring to overlap with the center of circle of femur index aperture in the second positioning rule section 22 is arrived
The vertical range of femur mechanical axis locating rod 1 is concentric fixed equal to what is overlapped in the first positioning rule section 21 with the center of circle of femur index aperture
The vertical range of position hole 3 to femur mechanical axis locating rod 1 is equal, and same with the common universal connection rod 7 for being fixed on operating bed
The heart presss from both sides the concentric mounting hole 3 in the second positioning rule section 22 of 8 clamping position rulers 2, fixes universal connection rod 7；
4. with reference to shown in Fig. 7, finally suffering limb is moved at the femur mechanical axis locating rod 1 of centre so that femur index aperture
The center of circle and the bisector of locating slot 11 coincide, and locating slot 11 is to be positioned as mechanical axis, and two pieces are pierced in locating slot 11 and is determined
Position pin, installation form osteotomy.
5. when being located at sagittal plane with method suffering limb and making horizontal position and raise, the sagittal plane line of force can be positioned.
The utility model principle：
With reference to shown in Fig. 8, isosceles triangle property is utilized：The apex angle bisector of isosceles triangle, the center line on base, bottom
Height on side overlaps（Write a Chinese character in simplified form into " unification of three line of isosceles triangle "）, it is possible thereby to release：If two isosceles triangles
Same base is shared, its apex angle bisector necessarily overlaps.When lower limb abduction, interior time receiving, that is, complete one using late-segmental collapse as
Line is the natural isosceles triangle on base when vertex, femoral intercondylar index aperture abduction, interior receipts position；In Fig. 8 of the present embodiment,
A points are the concentric locating hole overlapped in the first positioning rule section 21 with the center of circle of femur index aperture, and B points is in the second positioning rule sections 22
The concentric locating hole overlapped with the center of circle of femur index aperture, D points are the upper end of femur mechanical axis locating rod 1, in addition femur machine
The square crossing tie point of tool axis locating rod 1 and positioning rule 2 is C, and the AC sections of the utility model positioning rule 2 are closed with BC sections for mirror image
System, and AC sections are variable with BC sections of length, so that the isosceles triangle ADB that a base can change is formed, when outside lower limb
Exhibition, interior time receiving, by base and the utility model positioning rule shape that late-segmental collapse point O is the natural isosceles triangle that vertex is formed
Into the base of isosceles triangle ADB share and overlap, form the isosceles triangle ADB and AOB on two common bases.Then positioning rule
Femur mechanical axis locating rod 1 among 2 necessarily with the base vertical by isosceles triangle AOB that late-segmental collapse point O is vertex
Bisector CO coincides, and 1 extended line of femur mechanical axis locating rod among positioning rule 2 is necessarily by femoral head, femur machine at this time
The position of tool axis locating rod 1 is the mechanical axis of the femur to be found.
Furthermore, it is necessary to explanation, unless stated otherwise or is pointed out, the otherwise term in specification " first ", " the
The descriptions such as two " are used only for distinguishing various components, element, step etc. in specification, without being intended to indicate that various components, member
Logical relation or ordinal relation between element, step etc..
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.
Claims (7)
1. T-shaped positioning rule outside a kind of knee prosthesis marrow, it is characterised in that including femur mechanical axis locating rod（1）And with institute
State femur mechanical axis locating rod（1）The positioning rule of square crossing connection（2）, the positioning rule（2）Including being determined with femur mechanical axis
Position bar（1）For the first at least partly symmetrical positioning rule section of symmetry axis（21）With the second positioning rule section（22）.
2. T-shaped positioning rule outside knee prosthesis marrow according to claim 1, it is characterised in that the first positioning rule section
（21）With the second positioning rule section（22）It is equipped with fixed structure.
3. T-shaped positioning rule outside knee prosthesis marrow according to claim 2, it is characterised in that the fixed structure includes
It is distributed in the first positioning rule section（21）With the second positioning rule section（22）On some concentric locating holes（3）, the concentric locating hole
（3）For following one bone label hole, overlap both centers of circle.
4. T-shaped positioning rule outside knee prosthesis marrow according to claim 3, it is characterised in that the femur index aperture is
One in fossa intercondylaris femoris fornix portion central point（4）Along femur（5）The hole of the 2mm-4mm bored at longitudinal axis near-end 10mm-40mm.
5. T-shaped positioning rule outside the knee prosthesis marrow according to Claims 2 or 3, it is characterised in that further include and fixed knot
The matched auxiliary fixing structure of structure, the auxiliary fixing structure include a hollow circular cylinder（6）, the hollow circular cylinder（6）
Stretch into concentric locating hole（3）In and mutually form homocentric secure fit, the hollow circular cylinder（6）Periphery is equipped with a circular protrusion
（61）, the circular protrusion（61）With concentric locating hole（3）A mounting hole groove is formed between the body of rod of surrounding（62）, easy to correspondence
Clamping device clamp with one heart, prevent from slipping so that hollow circular cylinder（6）There is the freedom relatively rotated between clamping device
Degree, does not make horizontal, vertical displacement.
6. T-shaped positioning rule outside knee prosthesis marrow according to claim 5, it is characterised in that described is some fixed with one heart
Position hole（3）In the first positioning rule section（21）With the second positioning rule section（22）Upper spaced set.
7. T-shaped positioning rule outside knee prosthesis marrow according to claim 1, it is characterised in that the femur mechanical axis is determined
Position bar（1）It is equipped with the locating slot along its bar length direction（11）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720314346.8U CN207356110U (en) | 2017-03-29 | 2017-03-29 | T-shaped positioning rule outside a kind of knee prosthesis marrow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720314346.8U CN207356110U (en) | 2017-03-29 | 2017-03-29 | T-shaped positioning rule outside a kind of knee prosthesis marrow |
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| Publication Number | Publication Date |
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| CN207356110U true CN207356110U (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720314346.8U Active CN207356110U (en) | 2017-03-29 | 2017-03-29 | T-shaped positioning rule outside a kind of knee prosthesis marrow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107049417A (en) * | 2017-03-29 | 2017-08-18 | 苏州市吴中人民医院 | T-shaped positioning rule outside a kind of knee prosthesis marrow |
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- 2017-03-29 CN CN201720314346.8U patent/CN207356110U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107049417A (en) * | 2017-03-29 | 2017-08-18 | 苏州市吴中人民医院 | T-shaped positioning rule outside a kind of knee prosthesis marrow |
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