CN104367353A - Dilator in total knee arthroplasty - Google Patents
Dilator in total knee arthroplasty Download PDFInfo
- Publication number
- CN104367353A CN104367353A CN201410642013.9A CN201410642013A CN104367353A CN 104367353 A CN104367353 A CN 104367353A CN 201410642013 A CN201410642013 A CN 201410642013A CN 104367353 A CN104367353 A CN 104367353A
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- Prior art keywords
- dilator
- tka
- handle
- fagging
- shaped
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0206—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors with antagonistic arms as supports for retractor elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0268—Joint distractors for the knee
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a dilator in the total knee arthroplasty, and belongs to the field of medical instruments. By means of the dilator, balance between soft tissues on the inner side and the outer side of the knee joint can be measured. The dilator comprises a pincer-shaped body and a dilating end. The dilating end is arranged at the far end of the pincer-shaped body and comprises a thigh-bone-side part and a tibia-side part. The thigh-bone-side part comprises a U-shaped dilating plate and a bearing-type device. The U-shaped dilating plate is divided into the inner side and the outer side which correspond to the medial malleolus and the lateral malleolus at the far end of the thigh bone after bone cutting in the TKA. The bearing-type device is arranged at the root of the U-shaped dilating plate and provided with scale marks which correspond to the thigh-bone outward-rotation angle of a trapezoid gap during prosthesis buckling. The inner side and the outer side of the U-shaped dilating plate can rotate around the bearing-type device. The tibia-side part is a rectangular dilating plate similar to the cross section of the tibial plateau in shape. The dilator is simple in structure and low in cost, the two-side intervals on the thigh-bone side and the tibia side can be compared at the same time, balance between the inner side and the outer side of the knee joint in the TKA is guaranteed, and convenience is brought to clinic popularization.
Description
Technical field
The invention belongs to medical instruments field, be specifically related to dilator in a kind of TKA.
Background technology
TKA (Total Knee Arthroplasty, TKA) has become one of surgical intervention mode of the diseases such as degenerative osteoarthritis in late period, rheumatoid arthritis, ankylosing spondylitis.Because postoperative prolongation braking time and muscular training can not correct the unbalance of soft tissue, the balance of soft tissue depends on operation itself completely.Therefore, in TKA, soft tissue balance is and a step of key.In TKA, inside and outside knee joint, the experience of the main dependence operating doctor of lateral balance is with the hands assessed, and suitable effective aid is the important guarantee of operation.
Common dilator is one-sided work, and Main Function exposes operative region, is convenient to patient and operates, but cannot compare both sides spacing simultaneously.And senior instrument is such as with the spacing tester of pressure test component, cost is high, is not easy to clinical expansion.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, provide dilator in a kind of TKA, this dilator can survey outside soft tissue balance in knee joint.
Object of the present invention is achieved through the following technical solutions:
Dilator in a kind of TKA, comprises tong-like main body and struts end.The described end that struts is arranged on tong-like body distal end, comprises femur side component and tibial side parts; Femur side component comprises U-shaped fagging and bearing sampling device, and U-shaped fagging is divided into the interior ectocondyle of distal femur after osteotomy in inside and outside both sides (inside and outside lateral symmetry) corresponding TKA art; U-shaped fagging root has a bearing sampling device, and the inside and outside both sides of U-shaped fagging can rotate along bearing sampling device; Tibial side parts are the rectangle fagging close with tibial plateau osteotomy surface shape.
Described femur side component and the U-shaped fagging of tibial side parts and rectangle fagging are metallic plate, and fagging corner is round and smooth, can avoid damaging osteotomy surface.
Described bearing sampling device has scale, and the femur outward turning angle of trapezoidal gaps during corresponding Prosthesis flexion, in order to show the outward turning angle needed for femur osteotomy.Prosthese outward turning angle generally divides two kinds, and a kind of osteotomy post-buckling gap is parallel, and another kind of flexing gap is trapezoidal, so the scale on bearing sampling device divides two kinds, one is zero degree, and one is outward turning three degree.
Described tong-like main body comprises first handle, second handle, the bearing pin of hinged two handles, two stage clips, two screws and regulating positioning devices, and two stage clips mutually compression screw are separately fixed on first handle and second handle; Regulating positioning device can determine that dilator struts height, to determine joint space in TKA art.
Described regulating positioning device comprises hinged that arranges groove, the tooth shape locating bar connect by hinge and hinged table-hinges, and tooth shape locating bar is provided with tooth bar, and second handle end is fixed by tooth bar.
Described hinged is integral structure with first handle.
There is scale at the described tooth shape locating bar back side, can show dilator and strut end distance, and namely osteotomy patella stretches or flexing gap numerical value.
Described femur side component and tibial side parts are separately positioned on the far-end of second handle and first handle.
Strutting femur side component and tibial side parts both sides fagging plane keeping parallelism in process, because femur side component root has a bearing sampling device, the U-shaped fagging of femur side component can be rotated within the specific limits, if so interior outside is uneven, in the process that dilator struts, femur side there will be rotation, and tight side spacing can be less; When having loosened, after inside and outside lateral balance, interior outside will spacing equal, can allow intuitively like this and carry out assessing (if need flexing gap to be trapezoidal, then determining according to bearing sampling device).
The present invention has the following advantages and effect relative to prior art tool:
Whether femur side component of the present invention is U-shaped fagging, is divided into inside and outside both sides, and femur side component root has a bearing sampling device, be convenient to can assess intuitively in patient's TKA outside in knee joint and balance; Tooth shape locating bar and bearing sampling device with the addition of scale and can allow patient's femur outward turning angle of trapezoidal gaps when joint space and Prosthesis flexion in control TKA art accurately.
Structure of the present invention is simple, and cost is low, can compare femur side and tibial side both sides spacing simultaneously, to ensure that in TKA lateral balance inside and outside knee joint, is convenient to clinical expansion.
Accompanying drawing explanation
Fig. 1 is the structural representation of dilator in TKA;
Fig. 2 is femur side component schematic diagram;
Fig. 3 is tibial side block diagram;
Fig. 4 is regulating positioning device bottom schematic view;
Accompanying drawing acceptance of the bid note is described below: 1, first handle, and 2, second handle, 3, bearing pin, 4, femur side component, (outward) side in 4-1, U-shaped fagging, outer (interior) side of 4-2, U-shaped fagging, 4-3, bearing sampling device, 5, tibial side parts, 6, regulating positioning device, 7, stage clip, 8, screw, 9, hinged, 10, hinge, 11, tooth shape locating bar, 12, tooth bar.
Detailed description of the invention
Below in conjunction with specific embodiment, further detailed description is done to the present invention.Should be understood that the following examples are only not used in for illustration of the present invention to limit the scope of the invention.
Embodiment 1
Dilator in a kind of TKA, comprise tong-like main body and strut end, its structural representation as Figure 1-4.
Tong-like main body comprises first handle 1, second handle 2, the bearing pin 3 of hinged two handles, stage clip 7, screw 8 and regulating positioning device 6.Two mutual compression screws 8 of stage clip 7 are separately fixed on first handle 1 and second handle 2.Described regulating positioning device 6 comprises arrange groove hinged 9, by hinge 10 and hinged 9 hinged tooth shape locating bars 11, tooth shape locating bar 11 is provided with tooth bar 12, second handle 2 end is fixed by tooth bar 12.Wherein, hinged 9 is integral structure with first handle 1; There is scale at tooth shape locating bar 11 back side, can show dilator and strut end distance, and namely osteotomy patella stretches or flexing gap numerical value.
Strut end and be arranged on tong-like body distal end, comprise femur side component 4 and tibial side parts 5; Femur side component 4 and tibial side parts 5 are separately positioned on the far-end of second handle 2 and first handle 1.Femur side component 4 comprises U-shaped fagging and bearing sampling device 4-3, and U-shaped fagging is divided into the interior ectocondyle of distal femur after osteotomy in interior (outward) side 4-1, outer (interior) side 4-2 (inside and outside lateral symmetry) corresponding TKA art; U-shaped fagging root has a bearing sampling device 4-3, and inside and outside both sides 4-1 and 4-2 of U-shaped fagging can rotate along bearing sampling device 4-3; Bearing sampling device 4-3 has scale, the femur outward turning angle of trapezoidal gaps during corresponding Prosthesis flexion, in order to show the outward turning angle needed for femur osteotomy, described scale is zero degree or outward turning three degree.Tibial side parts 5 are the rectangle fagging close with tibial plateau osteotomy surface shape.The U-shaped fagging of femur side component 4 and tibial side parts 5 and rectangle fagging are metallic plate, and fagging corner is round and smooth, can avoid damaging osteotomy surface.
Strutting femur side component 4 and tibial side parts 5 both sides fagging plane keeping parallelism in process, because femur side component 4 root has a bearing sampling device 4-3, the U-shaped fagging of femur side component 4 can be rotated within the specific limits, if interior outside is uneven, in the process that dilator struts, femur side there will be rotation, and tight side spacing can be little; When having loosened, after inside and outside lateral balance, interior outside will spacing equal, can allow intuitively like this and carry out assessing (if need flexing gap to be trapezoidal, then determining according to bearing sampling device).
Claims (9)
1. a dilator in TKA, is characterized in that: comprise tong-like main body and strut end; The described end that struts is arranged on tong-like body distal end, comprises femur side component and tibial side parts; Described femur side component comprises U-shaped fagging and bearing sampling device; Described U-shaped fagging is divided into inside and outside both sides, and its root has a bearing sampling device; Described tibial side parts are rectangle fagging.
2. dilator in TKA according to claim 1, is characterized in that: described femur side component and the U-shaped fagging of tibial side parts and rectangle fagging are metallic plate, and fagging corner is round and smooth.
3. dilator in TKA according to claim 1, is characterized in that: described bearing sampling device has scale, in order to show the outward turning angle needed for femur osteotomy.
4. dilator in TKA according to claim 3, is characterized in that: described scale is zero degree or outward turning three degree.
5. dilator in TKA according to claim 1, it is characterized in that: described tong-like main body comprises first handle, second handle, the bearing pin of hinged two handles, two stage clips, two screws and regulating positioning devices, two stage clips mutually compression screw are separately fixed on first handle and second handle.
6. dilator in TKA according to claim 5, is characterized in that: described regulating positioning device comprises hinged that arranges groove, the tooth shape locating bar connect by hinge and hinged table-hinges, and tooth shape locating bar is provided with tooth bar.
7. dilator in TKA according to claim 6, is characterized in that: described hinged is integral structure with first handle.
8. dilator in TKA according to claim 6, is characterized in that: there is scale at the described tooth shape locating bar back side.
9. dilator in TKA according to claim 5, is characterized in that: described femur side component and tibial side parts are separately positioned on the far-end of second handle and first handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642013.9A CN104367353A (en) | 2014-11-14 | 2014-11-14 | Dilator in total knee arthroplasty |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642013.9A CN104367353A (en) | 2014-11-14 | 2014-11-14 | Dilator in total knee arthroplasty |
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| Publication Number | Publication Date |
|---|---|
| CN104367353A true CN104367353A (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410642013.9A Pending CN104367353A (en) | 2014-11-14 | 2014-11-14 | Dilator in total knee arthroplasty |
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| CN (1) | CN104367353A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107693065A (en) * | 2017-11-07 | 2018-02-16 | 北京蒙太因医疗器械有限公司 | Knee space retractor |
| CN108567453A (en) * | 2018-03-15 | 2018-09-25 | 郭子恒 | A kind of new-type multi-purpose gun-shaped surgical dilator |
| CN111643195A (en) * | 2020-05-19 | 2020-09-11 | 北京市春立正达医疗器械股份有限公司 | Knee joint tissue balancer |
| CN111714166A (en) * | 2020-06-02 | 2020-09-29 | 柴瑞宝 | Multi-functional caliber that struts of orthopedics |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5782925A (en) * | 1997-11-06 | 1998-07-21 | Howmedica Inc. | Knee implant rotational alignment apparatus |
| US6361564B1 (en) * | 1999-02-02 | 2002-03-26 | Aesculap | Total knee joint comprising an insert movable relative to a tenon |
| CN204274530U (en) * | 2014-11-14 | 2015-04-22 | 付奇伟 | Dilator in TKA |
| CN105310732A (en) * | 2015-10-30 | 2016-02-10 | 杭州市萧山区第一人民医院 | Internal spreader for knee joints |
-
2014
- 2014-11-14 CN CN201410642013.9A patent/CN104367353A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5782925A (en) * | 1997-11-06 | 1998-07-21 | Howmedica Inc. | Knee implant rotational alignment apparatus |
| US6361564B1 (en) * | 1999-02-02 | 2002-03-26 | Aesculap | Total knee joint comprising an insert movable relative to a tenon |
| CN204274530U (en) * | 2014-11-14 | 2015-04-22 | 付奇伟 | Dilator in TKA |
| CN105310732A (en) * | 2015-10-30 | 2016-02-10 | 杭州市萧山区第一人民医院 | Internal spreader for knee joints |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107693065A (en) * | 2017-11-07 | 2018-02-16 | 北京蒙太因医疗器械有限公司 | Knee space retractor |
| CN107693065B (en) * | 2017-11-07 | 2024-02-09 | 北京蒙太因医疗器械有限公司 | Knee joint gap retractor |
| CN108567453A (en) * | 2018-03-15 | 2018-09-25 | 郭子恒 | A kind of new-type multi-purpose gun-shaped surgical dilator |
| CN111643195A (en) * | 2020-05-19 | 2020-09-11 | 北京市春立正达医疗器械股份有限公司 | Knee joint tissue balancer |
| CN111714166A (en) * | 2020-06-02 | 2020-09-29 | 柴瑞宝 | Multi-functional caliber that struts of orthopedics |
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Application publication date: 20150225 |
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