CN204181747U - A kind of knee prosthesis femur marrow external position device - Google Patents
A kind of knee prosthesis femur marrow external position device Download PDFInfo
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- CN204181747U CN204181747U CN201420295979.5U CN201420295979U CN204181747U CN 204181747 U CN204181747 U CN 204181747U CN 201420295979 U CN201420295979 U CN 201420295979U CN 204181747 U CN204181747 U CN 204181747U
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- positioner
- bone cutting
- head rod
- knee prosthesis
- position device
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- 210000000689 upper leg Anatomy 0.000 title claims abstract description 26
- 210000003127 knee Anatomy 0.000 title claims abstract description 19
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 39
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 abstract description 22
- 230000008901 benefit Effects 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 230000004048 modification Effects 0.000 description 16
- 238000012986 modification Methods 0.000 description 16
- 210000000629 knee joint Anatomy 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 208000032843 Hemorrhage Diseases 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 206010067268 Post procedural infection Diseases 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000006820 Arthralgia Diseases 0.000 description 1
- 208000006193 Pulmonary infarction Diseases 0.000 description 1
- 241001227561 Valgus Species 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 210000002683 foot Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007575 pulmonary infarction Effects 0.000 description 1
- 210000002303 tibia Anatomy 0.000 description 1
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Abstract
This utility model relates to a kind of knee prosthesis femur marrow external position device, it is characterized in that, described positioner comprises the fixing bow of anterior superior iliac spine (1), head rod (2), described head rod (1) is vertically connected on the fixing bow (1) of anterior superior iliac spine, the other end of described head rod connects bone cutting positioner (3), described positioner also comprises measuring stick (4), and described measuring stick (4) is connected with bone cutting positioner (3).Advantage of the present utility model is as follows, 1) overall construction design is ingenious, easy for installation; 2) have employed accurate right angle in this technical scheme and connect design and can the bone cutting positioner tool of multiple measurement, guarantee its degree of accuracy further; 3) handle of the bone cutting positioner in this technical scheme has complicated and meticulous two fork-shapeds, grooved, scale and aperture design.Connecting rod can be limited in localizer by two fork-shaped design, and size matches, and can ensure to parallel with connecting rod at Coronal.
Description
Technical field
The present invention relates to a kind of positioner, particularly a kind of knee prosthesis femur marrow external position device, belongs to medical instruments field.
Background technology
Knee prosthesis is widely used in clinical at present, is the ripe surgical technic of joint surgery, has absolute operative effect for alleviation gerontal patient gonalgia deformity.But operation simultaneously also brings all multi-risk Systems, because operation wound is relatively large, postoperative infection, hemorrhage, pulmonary infarction etc. also bring a lot of problem.In today of knee-joint prosthesis develop rapidly, the curative effect most critical of knee surgery be still surgical technic, the line of force accuracy of knee prosthesis and the life-span at a specified future date of prosthese closely bound up.What tibia navigation system was generally acknowledged at present is still marrow outside fix, because tibial shaft is relatively shown shallow, para-position for the line of force is relatively accurate, and the osteotomy of femoral prosthesis then exists certain dispute, is mainly the computer navigation location outside marrow and traditional femur marrow inner position.
Conventional femoral marrow inner position adds intramedullary hemorrhage, and with enter pin mark, bar insertion depth in marrow, the thickness of femoral bone cavitas medullaris own, anterior arch or the outer bow degree of femoral shaft are in close relations, most domestic doctor selects 5 °, 6 ° or 7 ° of valgus angle position, majority is selected according to preoperative taking measurement of an angle, but the great case that takes measurement of an angle is encountered in clinical meeting, as femur malunion case, be subject to the localizer restriction of each prosthese company, assurance for osteotomy angle is often not accurate enough even cannot be operated, and be subject to the impact of preoperative x-ray, often there is comparatively big error in measurement as preoperative in non-standard location x-ray, and this kind of measuring method has only paid close attention to the location of Coronal, have ignored the Position location accuracy of sagittal plain.
The advantage of navigator fix does not need to carry out expansion marrow, decrease the hemorrhage of pulp cavity, although navigator fix decreases error, but operating time extends greatly, although Clinical controlled trial finds that it has obvious improvement for the line of force, too increase the risk of postoperative infection, and due to operation learning curve longer, the expensive expense of navigator, is developed so far and does not extensively promote the use of yet.
The company of knee-joint prosthesis is all equipped with the measuring apparatus of some marrow outside fixs, but because it is subject to the design constraints of different company, its locating rod all just points to femoral head by positioning needle and carries out osteotomy surface judgement, whether coarsely locate, be subject to the impact of external rotation in knee joint, and osteotomy surface adjustment cannot be carried out fast.Basic unmanned use.Therefore, a kind of new scheme of exigence solves the problems of the technologies described above.
Summary of the invention
The present invention is just for the technical problem existed in prior art, a kind of knee prosthesis femur marrow external position device is provided, this device global design is ingenious, the operating process of operation can be made to become more simple, convenient, accurately and reliably, effective minimizing operating time and blood loss volume during the operation, greatly alleviate patient suffering, reduce operation risk, and make surgical effect more reliable.
To achieve these goals, the technical solution used in the present invention is as follows, a kind of knee prosthesis femur marrow external position device, it is characterized in that, described positioner comprises the fixing bow of anterior superior iliac spine, head rod, and described head rod is vertically connected on the fixing bow of anterior superior iliac spine, and the other end of described head rod connects bone cutting positioner, described positioner also comprises measuring stick, and described measuring stick is connected with bone cutting positioner.This positioner global design is ingenious, and carry out femoral head location by preoperative common AP roentgenograms with reference to anterior superior iliac spine, marrow outside fix apparatus is made up of rigid structure, and instrument can carry out multiple assay, further increases Position location accuracy.
As a modification of the present invention, described positioner also comprises fixed part, and head rod is fixedly connected with bone cutting positioner by described fixed part.And guarantee that head rod and bone cutting positioner are mutually vertical.
As a modification of the present invention, the fixing bow of described anterior superior iliac spine is made up of L shape column and T-shaped column, described T-shaped upright post sleeve is connected on the cross bar of L shape column, both sides anterior superior iliac spine length can be adjusted to, the anterior superior iliac spine line distance measured according to preoperative AP roentgenograms extrapolates the position of late-segmental collapse and L shape cross bar intersection point, also can have an X-rayed the accuracy guaranteeing the line of force in art, cross bar mark has scale to prevent the displacement of connecting rod in art.
As a modification of the present invention, described head rod is set to T-shaped connecting rod, on the cross bar of described T-shaped connecting rod perpendicular to L shape column.
As a modification of the present invention, described bone cutting positioner whole installation is T-shaped, and described head rod is fixed on the top of bone cutting positioner.After condyle face contacts with condyle of femur, semifixed in knee joint femoral condyle center by little rivet.
As a modification of the present invention, bone cutting positioner is provided with two fork-shaped, grooved, scale and aperture.Fluting design size matches with bolt and plays position-limiting action, nail consistent size conventional in orifice size design and operation, can play double limitation effect and as fluting design supplementary; Connecting rod can be limited in localizer by two fork-shaped design, and size matches, can ensure to parallel with connecting rod at Coronal, and late-segmental collapse and the condyle of femur line of centres and head rod are parallel to each other, thus make osteotomy surface perpendicular to femur mechanical axis.
As a modification of the present invention, described measuring stick is made up of the second connecting rod and guide pin, and described second connecting rod is connected in slotted eye corresponding on bone cutting positioner.The late-segmental collapse position correctness pointed to by guide pin judges the Position location accuracy of sagittal plain.
As a modification of the present invention, described fixed part is set to the one in latch, anchor chain, locating rod.For being fixedly connected with bone cutting positioner by head rod, and guarantee that head rod is vertically connected with bone cutting positioner.
As a modification of the present invention, described positioner also comprises bolt and nut, and described bolt and nut and fixed part fix the height of head rod jointly.
Relative to prior art, advantage of the present invention is as follows, 1) overall construction design is ingenious, easy for installation; 2) have employed accurate right angle in this technical scheme and connect design and can the bone cutting positioner tool of multiple measurement, guarantee its degree of accuracy further; 3) handle of the bone cutting positioner in this technical scheme has complicated and meticulous two fork-shapeds, grooved, scale and aperture design, and connecting rod can be limited in localizer by two fork-shaped design, and size matches, and can ensure to parallel with connecting rod at Coronal; Grooved, scale fitted bolt are fixing can multiple form fixed handle and make osteotomy surface perpendicular to the femoral head knee joint line of centres, aperture design can play position-limiting action equally and make up once supplementing time groove design lost efficacy, thus can realize multiple judgement thus obtain carrying out marrow outside fix accurately; 4) this equipment safety is good, reduces patient suffering, shortens operating time, is convenient to large-scale promotion and uses.
Accompanying drawing explanation
Fig. 1 is anterior superior iliac spine fixing bow L shape pillar construction schematic diagram;
Fig. 2 is anterior superior iliac spine fixing bow T-shaped pillar construction schematic diagram;
Fig. 3 is head rod structural representation;
Fig. 4 is bone cutting positioner structural representation;
Fig. 5 is the second connecting rod structural representation of measuring stick;
Fig. 6 is measuring stick guide pin structural representation;
Fig. 7 is fixed part structural representation;
Fig. 8 is screw bolt and nut structural representation
Fig. 9 is this positioner overall structure schematic diagram;
In figure: 1 is the fixing bow of anterior superior iliac spine; 11 is L shape column, and 12 is T-shaped column, and 2 is head rod; 3 is bone cutting positioner; 4 is measuring stick; 41 is the second connecting rod; 42 is guide pin; 5 is fixed part; 6 is bolt and nut.
Detailed description of the invention
In order to deepen the understanding of the present invention and understanding, below in conjunction with accompanying drawing, the invention will be further described and introduce.
embodiment 1: see Fig. 9, a kind of knee prosthesis femur marrow external position device, described positioner comprises anterior superior iliac spine and fixes bow 1, head rod 2, described head rod 2 is vertically connected at anterior superior iliac spine and fixes on bow 1, the other end of described head rod connects bone cutting positioner 3, described positioner also comprises measuring stick 4, and described measuring stick 4 is connected with bone cutting positioner 3.This positioner global design is ingenious, and carry out femoral head location by preoperative common AP roentgenograms with reference to anterior superior iliac spine, marrow outside fix apparatus is made up of rigid structure, and instrument can carry out multiple assay, further increases Position location accuracy.
embodiment 2: see Fig. 9, as a modification of the present invention, described positioner also comprises fixed part 5, and head rod 2 is fixedly connected with bone cutting positioner 3 by described fixed part.And guarantee that head rod 2 is mutually vertical with bone cutting positioner 3.All the other structures are identical with embodiment 1 with advantage.
embodiment 3: see Fig. 1,2, as a modification of the present invention, described anterior superior iliac spine is fixed bow 1 and is made up of L shape column and T-shaped column, described T-shaped upright post sleeve is connected on the cross bar of L shape column, both sides anterior superior iliac spine length can be adjusted to, the anterior superior iliac spine line distance measured according to preoperative AP roentgenograms extrapolates the position of late-segmental collapse and L shape cross bar intersection point, also can have an X-rayed the accuracy guaranteeing the line of force in art, and cross bar mark has scale to prevent the displacement of connecting rod in art.All the other structures are identical with embodiment 1 with advantage.
embodiment 4: see Fig. 3, as a modification of the present invention, described head rod 2 is set to T-shaped connecting rod, on the cross bar of described T-shaped connecting rod perpendicular to L shape column.All the other structures are identical with embodiment 1 with advantage.
embodiment 5: see Fig. 4, Fig. 9, as a modification of the present invention, described bone cutting positioner 3 whole installation is T-shaped, and described head rod 2 is fixed on the top of bone cutting positioner 3.After condyle face contacts with condyle of femur, semifixed in knee joint femoral condyle center by little rivet.All the other structures are identical with embodiment 1 with advantage.
embodiment 6: see Fig. 4, Fig. 9, as a modification of the present invention, bone cutting positioner 3 is provided with two fork-shaped, grooved, scale and aperture.Connecting rod can be limited in localizer by two fork-shaped design, and size matches, and can ensure to parallel with connecting rod at Coronal; Grooved, scale fitted bolt are fixing can multiple form fixed handle and make osteotomy surface perpendicular to the femoral head knee joint line of centres, and aperture design can play position-limiting action equally and make up once supplementing time groove design lost efficacy.Can ensure to parallel with connecting rod at Coronal, and late-segmental collapse and the condyle of femur line of centres and head rod are parallel to each other, thus make osteotomy surface perpendicular to femur mechanical axis.All the other structures are identical with embodiment 1 with advantage.
embodiment 7: see Fig. 5, Fig. 6, as a modification of the present invention, described measuring stick 4 is made up of the second connecting rod 41 and guide pin 42, and described second connecting rod 41 is connected in slotted eye corresponding on bone cutting positioner 3.The late-segmental collapse position correctness pointed to by guide pin judges the Position location accuracy of sagittal plain.All the other structures are identical with embodiment 1 with advantage.
embodiment 8: see Fig. 7, as a modification of the present invention, described fixed part is set to the one in latch, anchor chain, locating rod.For head rod 2 is fixedly connected with bone cutting positioner 3, and guarantee that head rod 2 is vertically connected with bone cutting positioner 3, its size and fork-shaped and groove design match, and when its T-shaped cross bar is parallel with connecting rod 2 time, bone cutting positioner and connecting rod are parallel to each other.All the other structures are identical with embodiment 1 with advantage.
embodiment 9: see Fig. 9, as a modification of the present invention, described positioner also comprises bolt and nut 6, and described bolt and nut and fixed part fix the height of head rod 2 jointly.All the other structures are identical with embodiment 1 with advantage.
Operation principle is as follows, see Fig. 1-Fig. 9, two foots fixing bow 1 for anterior superior iliac spine is stood on anterior superior iliac spine by assistant, and the anterior superior iliac spine line distance measured according to preoperative AP roentgenograms extrapolates the position of late-segmental collapse and L shape cross bar intersection point.Also the accuracy guaranteeing the line of force can be had an X-rayed in art.The L shape cross bar mark that anterior superior iliac spine fixes bow has scale to prevent the displacement of connecting rod in art.Head rod 2 is connected L shape cross bar until above knee joint.After the condyle face of bone cutting positioner 3 is contacted with condyle of femur, semifixed in knee joint femoral condyle center by little rivet, then connecting handle is connected with head rod 2.Now Coronal parallels with connecting rod, preliminary judgement knee joint center is consistent with the Distance geometry late-segmental collapse of head rod 2 and the distance of head rod 2, screw bolt and nut 6 is tightened in the groove of head rod 2, and be connected and fixed parts 5, as latch, thus late-segmental collapse and the condyle of femur line of centres and head rod 2 are parallel to each other.Finally measuring stick 4 can be connected to bone cutting positioner 3, by judging that whether guide pin is parallel to the correctness of the dual judgement sagittal plain of head rod 2 by late-segmental collapse.Thus the good line of force can be obtained in sagittal plain and Coronal simultaneously.
At least one in technical characteristic described in embodiment 2,3,4,5,6,7,8,9 and embodiment 1 can also be combined to form new embodiment by the present invention.
It should be noted that above-described embodiment, be not used for limiting protection scope of the present invention, equivalents done on the basis of technique scheme or the alternative scope all falling into the claims in the present invention and protect.
Claims (9)
1. a knee prosthesis femur marrow external position device, it is characterized in that, described positioner comprises the fixing bow of anterior superior iliac spine (1), head rod (2), described head rod (1) is vertically connected on the fixing bow (1) of anterior superior iliac spine, the other end of described head rod connects bone cutting positioner (3), described positioner also comprises measuring stick (4), and described measuring stick (4) is connected with bone cutting positioner (3).
2. a kind of knee prosthesis femur marrow external position device according to claim 1, it is characterized in that, described positioner also comprises fixed part (5), and head rod (2) is fixedly connected with bone cutting positioner (3) by described fixed part.
3. a kind of knee prosthesis femur marrow external position device according to claim 1, is characterized in that, the fixing bow (1) of described anterior superior iliac spine is made up of L shape column and T-shaped column, and described T-shaped upright post sleeve is connected on the cross bar of L shape column.
4. a kind of knee prosthesis femur marrow external position device according to claim 3, it is characterized in that, described head rod (2) is set to T-shaped connecting rod, on the cross bar of described T-shaped connecting rod perpendicular to L shape column.
5. a kind of knee prosthesis femur marrow external position device according to claim 1, it is characterized in that, described bone cutting positioner (3) whole installation is T-shaped, and described head rod (2) is fixed on the top of bone cutting positioner (3).
6. a kind of knee prosthesis femur marrow external position device according to claim 2, is characterized in that, bone cutting positioner (3)
On be provided with two fork-shaped, grooved, scale and aperture.
7. a kind of knee prosthesis femur marrow external position device according to claim 6, it is characterized in that, described measuring stick (4) is made up of the second connecting rod (41) and guide pin (42), and described second connecting rod (41) is connected in the upper corresponding slotted eye of bone cutting positioner (3).
8. a kind of knee prosthesis femur marrow external position device according to claim 2, it is characterized in that, described fixed part is set to the one in latch, anchor chain, locating rod.
9. a kind of knee prosthesis femur marrow external position device according to claim 2, it is characterized in that, described positioner also comprises bolt and nut (6), and described bolt and nut and fixed part fix the height of head rod (2) jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420295979.5U CN204181747U (en) | 2014-06-05 | 2014-06-05 | A kind of knee prosthesis femur marrow external position device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420295979.5U CN204181747U (en) | 2014-06-05 | 2014-06-05 | A kind of knee prosthesis femur marrow external position device |
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| Publication Number | Publication Date |
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| CN204181747U true CN204181747U (en) | 2015-03-04 |
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| CN201420295979.5U Expired - Lifetime CN204181747U (en) | 2014-06-05 | 2014-06-05 | A kind of knee prosthesis femur marrow external position device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104027190A (en) * | 2014-06-05 | 2014-09-10 | 南京大学医学院附属鼓楼医院 | Femoral extramedullary positioning device for knee joint replacement |
-
2014
- 2014-06-05 CN CN201420295979.5U patent/CN204181747U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104027190A (en) * | 2014-06-05 | 2014-09-10 | 南京大学医学院附属鼓楼医院 | Femoral extramedullary positioning device for knee joint replacement |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160114 Address after: Liuhe District of Nanjing City Branch Road 211500 No. 9 building of Jiangsu province C13 Patentee after: Jiangsu Ke Ke Long Medical Technology Development Co., Ltd. Address before: 210008 Zhongshan Road, Jiangsu, No. 321, Patentee before: Gulou Hospital Attached to Medical College of Nanjing Univ. |