CN111643195A - Knee joint tissue balancer - Google Patents
Knee joint tissue balancer Download PDFInfo
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- CN111643195A CN111643195A CN202010427006.2A CN202010427006A CN111643195A CN 111643195 A CN111643195 A CN 111643195A CN 202010427006 A CN202010427006 A CN 202010427006A CN 111643195 A CN111643195 A CN 111643195A
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- 210000000629 knee joint Anatomy 0.000 title claims abstract description 24
- 210000001519 tissue Anatomy 0.000 claims abstract description 4
- 210000002303 tibia Anatomy 0.000 claims description 32
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 210000000689 upper leg Anatomy 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 11
- 210000003127 knee Anatomy 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 241000446313 Lamella Species 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 210000001694 thigh bone Anatomy 0.000 description 29
- 238000005452 bending Methods 0.000 description 8
- 210000000988 bone and bone Anatomy 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 208000008558 Osteophyte Diseases 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 208000003947 Knee Osteoarthritis Diseases 0.000 description 1
- 206010048873 Traumatic arthritis Diseases 0.000 description 1
- 241001227561 Valgus Species 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 201000010934 exostosis Diseases 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 201000008482 osteoarthritis Diseases 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1732—Guides or aligning means for drills, mills, pins or wires for bone breaking devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
- A61B17/1764—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the knee
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/061—Measuring instruments not otherwise provided for for measuring dimensions, e.g. length
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dentistry (AREA)
- Pathology (AREA)
- Prostheses (AREA)
Abstract
The invention relates to a knee joint tissue balancer, which relates to the field of medical instruments and has the technical scheme that: the femoral condyle size measuring device comprises a central shaft, wherein scales are arranged on the central shaft, the central shaft is connected with a driving block in a sliding manner, a tibial plate is arranged on one side of the driving block, a femoral plate matched with the tibial plate is arranged above the central shaft, and a measuring mechanism for measuring the size of a femoral condyle is arranged on the femoral plate; the measuring mechanism comprises a measuring main body connected above the femoral plate, a sliding rod is connected to the measuring main body in a sliding mode along the axial direction of a central shaft, a measuring rod is vertically arranged on the sliding rod, and the measuring rod is connected with the sliding rod in a sliding mode. The invention has the advantages that: the tissue balancer has multiple functions, thereby reducing multiple tool transmission in the operation process and improving the operation efficiency.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a knee joint tissue balancer.
Background
Knee joint replacement is one of the commonly used operation modes for clinically treating diseases such as knee osteoarthritis, traumatic arthritis, rheumatoid disease and the like at present, and has good postoperative effect. The ultimate goal of osteotomy is to achieve a rectangular flexion and extension gap. In order to obtain a rectangular knee bending gap, currently, the commonly used osteotomy methods in clinical practice are a measurement osteotomy (equivalent osteotomy) and a gap balance method. The equivalent osteotomy technology is relatively popular in China, and mainly carries out positioning through bony anatomical landmarks, and guides the rotation positioning of the femur and the osteotomy of the anterior condyle and the posterior condyle on the principle of how much osteotomy is supplemented. Posterior condylar osteophytes, posterior condylar wear, and intra-articular deformities, which sometimes make it difficult to accurately locate anatomical landmarks of the femur.
The gap balancing method is to first straighten the bone of the gap to obtain a balanced straightened gap, then to use the balanced straightened gap as a reference, and to prop open the knee-bending gap by the strutting instrument with the same inner and outer side strutting tension, to carry out the bone-cutting positioning of the front and rear condyles of the femur, so as to achieve the balance of the inner and outer side gaps and the balance of the flexion and extension gaps under the flexion state. Compared with the measurement osteotomy technology, the gap balancing technology can improve the flexion stability of the knee joint and prolong the service life of the prosthesis.
As shown in fig. 1 and 2, the gap balancer mainly includes a gear rod 81, a lower plate 82 fixed to an end of the gear rod 81, and an upper plate 83 connected to the gear rod 81 in a sliding manner, wherein the upper plate 83 is parallel to the lower plate 82, and a position-locking assembly 84 for locking a sliding position of the upper plate is further disposed on a side of the lower plate 82 away from the upper plate 83.
When the present art person carries out the operation, at first cut the bone to shin bone and thighbone distal end, on the basis of getting rid of osteophyte, straighten the clearance balance again, insert into the junction of shin bone and thighbone with lower plate and upper plate, slide each other through upper plate and gear pole, adjust the interval between upper plate and the lower plate to will straighten the clearance and strut, thereby to the osteotomy location of thighbone front and back condyle, cut the bone to thighbone back condyle again at last. In the process, the gap balancer used by the surgeon can only measure the gap between the femur and the tibia, the functionality is single, and in the operation process, the surgeon also needs to know the size of the femoral condyle so as to determine the size of the prosthesis, so that multiple times of transmission of tools are needed, and the operation efficiency is reduced.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a knee tissue balancer having multiple functions, thereby reducing the number of tool transfers during surgery and improving the efficiency of the operation.
The technical purpose of the invention is realized by the following technical scheme:
a knee joint tissue balancer comprises a central shaft, wherein the central shaft is provided with scales, the central shaft is connected with a driving block in a sliding manner, one side of the driving block is provided with a tibial plate, a femoral plate matched with the tibial plate is arranged above the central shaft, and the femoral plate is provided with a measuring mechanism for measuring the size of a femoral condyle;
the measuring mechanism comprises a measuring main body connected above the femoral plate, a sliding rod is connected to the measuring main body in a sliding mode along the axial direction of a central shaft, a measuring rod is vertically arranged on the sliding rod, and the measuring rod is connected with the sliding rod in a sliding mode.
Through adopting above-mentioned technical scheme, when measuring the knee clearance of bending, the staff at first laminates femoral plate and shin bone plate each other to insert into between shin bone and the thighbone from the knee joint department, then through the slip of drive block and center pin, adjusts the clearance between femoral plate and the shin bone plate, makes the knee clearance of bending strut, reaches the tensile purpose of adjustment medial and lateral muscle, and the person of satisfying the back carries out thighbone distal end again and cuts the bone, reaches the balanced purpose in the outer outside of knee joint. After the gap balance is completed by a worker, the worker needs to determine the size of the prosthesis according to the condition of the femoral condyle, the measurement position of the measurement rod needs to be adjusted through the sliding of the sliding rod, then the measurement rod is enabled to lean against the outer surface of the femoral condyle through the mutual sliding of the measurement rod and the sliding rod, the relative sliding position of the measurement rod and the sliding rod is recorded, and the size determination of the prosthesis is realized. The working personnel can complete the measurement of the knee bending gap and the measurement of the size of the femoral condyle only through the knee joint organizer, thereby reducing the tool transmission times and improving the operation efficiency.
The present invention in a preferred example may be further configured to: the measuring stick is including being used for with the arc cooperation portion of thighbone condyle laminating screens and setting the portion of sliding in arc cooperation portion one end, the portion of sliding slides with the slide bar and is connected.
Through adopting above-mentioned technical scheme, because the tip size of thighbone is greater than the size at thighbone middle part to size class is like globular, sets up the tip of measuring stick into the arc, makes the tip of measuring stick can laminate the outline of thighbone condyle more, so that improve measuring position's precision, then confirms the specific size of thighbone condyle through the sliding position of sliding part and slide bar.
The present invention in a preferred example may be further configured to: the measuring device is characterized in that a fixed seat is fixedly connected to the femoral plate, a sliding block is fixedly connected to the fixed seat, a sliding way matched with the sliding block is formed in the measuring main body, and the axial direction of the sliding way is the same as the extending direction of the femoral plate.
Through adopting above-mentioned technical scheme, mutually supporting of slider and slide has realized measuring main part and the mutual slip of fixing base, and when the staff measured the thighbone condyle size, the staff can make measuring main part lean on the tip at the thighbone through the slip between measuring main part and the base earlier to the slip of readjustment measuring stick, and then improved and reduced measuring error.
The present invention in a preferred example may be further configured to: the femoral plate and the tibial plate are integrally U-shaped, and in an initial state, the femoral plate and the tibial plate are attached to each other.
Through adopting above-mentioned technical scheme, the effect of dodging has been played to the ligament that shin bone and thighbone are connected to the thighbone board and the shin bone board of U type to make thighbone board and shin bone board insert more degree of depth, it is bigger with the area of contact of thighbone and shin bone, thereby it is more stable to the clearance adjustment of thighbone and shin bone.
The present invention in a preferred example may be further configured to: the measuring main body is provided with a sliding hole, the axial direction of the sliding hole is parallel to the axial direction of the central shaft, and a driving assembly for driving the sliding rod to slide along the axial direction of the sliding hole is arranged in the measuring main body;
the drive assembly is including setting up the axis of rotation in measuring the main part, and the axis of rotation is connected with measuring the main part inner wall rotation, and the one end rigid coupling of axis of rotation has a first knob, the global coaxial rigid coupling of axis of rotation has a first driving gear, it is connected with a driven gear to measure the main part internal rotation, first driving gear and driven gear intermeshing, be provided with a bar rack along the axial of slide bar on the slide bar, driven gear and bar rack intermeshing.
Through adopting above-mentioned technical scheme, the first driving gear of staff's accessible drives and rotates to drive driven gear in proper order and rotate, through the intermeshing of driven gear and bar rack, and make the slide bar along the axial slip of slide opening under the spacing of slide opening, thereby realized the fine setting to slide bar sliding position, improved the regulation precision.
The present invention in a preferred example may be further configured to: the driving block is provided with a fine adjustment component for fine adjustment of the tibial plate,
the fine adjustment assembly comprises an adjusting plate which is arranged above the driving block and is connected with the central shaft in a sliding manner, and the tibial plate is fixedly connected to one side of the adjusting plate; the adjusting plate lower surface has a rack along the axis rigid coupling of center pin, driving block one side is rotated and is connected with a second knob, and the coaxial rigid coupling of second knob has a second driving gear, second driving gear and rack intermeshing.
Through adopting above-mentioned technical scheme, when the drive block slided with the center pin each other, receive the influence of drive block and center pin frictional resistance, make the drive block not slide the assigned position of center pin when exerting oneself less, when exerting oneself great, cause the damage to the knee joint organism easily, so when removing to the miniaturation, the rotation of staff's accessible second knob, it rotates to drive the second driving gear, through the intermeshing of second driving gear with the rack, drive the microspur regulation of regulating plate and center pin, not only can realize the accurate regulation of distance adjustment, and the damage to the organism has still been reduced.
The present invention in a preferred example may be further configured to: the femoral plate is detachably connected with the central shaft, a containing hole is formed in the central shaft, and an angle measuring assembly is detachably connected to the central shaft;
the angulometry subassembly includes that the second inserts the post, and the rigid coupling has a sighting rod on the post is inserted to the second, the second is inserted and is rotated on the post and be connected with a swivel ring, and the rigid coupling has a scale on the swivel ring, and the middle part of scale is zero scale to increase in proper order to both sides, the homonymy rigid coupling that the swivel ring is located shin bone plate has a stock bone limiting plate, when thighbone limiting plate and shin bone plate are parallel to each other, the zero scale of the directional scale of sighting rod.
Through adopting above-mentioned technical scheme, when the staff is carrying out the extension clearance and is measuring, pull apart femoral plate and center pin each other earlier, then insert the upper end of establishing the center pin with the angulation subassembly, the staff can insert femoral limiting plate and shin plate simultaneously and establish the junction of shin bone and thighbone, through the slip of driving block and center pin, adjusts the interval between femoral limiting plate and the shin plate, reaches the purpose in straightening clearance. And the contact of thighbone limiting plate is at the tip of thighbone to can drive the rotation between swivel becket and the second inserted column, also make the scale appear floating, thereby audio-visual observation axis of turning up. Moreover, the components at the end part of the central shaft can be replaced according to different requirements by workers, so that the multifunctional central shaft is powerful and convenient to replace.
The present invention in a preferred example may be further configured to: the lower surface of the tibia plate is provided with a groove at the joint with the tibia bone surface.
By adopting the technical scheme, the contact area between the tibial plate and the end face of the tibia is increased by arranging the groove, so that the stress on the surface of the tibia is more stable, and the situation of bone surface deformation caused by overlarge distraction force is reduced.
In conclusion, the invention has the following beneficial effects:
firstly, the operation time is shortened, and an operator can directly use the measuring rod to measure the size of the femoral condyle after gap balance is finished without using a back instrument to measure, so that the operation time is shortened;
the knee joint tissue balancer can measure not only the knee bending gap and the straightening gap, but also the size of the femoral condyle, and can visually determine the eversion axis.
Drawings
FIG. 1 is a front view of a gap balancer in the related art;
FIG. 2 is a side view of a prior art gap balancer;
FIG. 3 is a schematic structural diagram of a knee joint tissue balancer embodying the present embodiment;
fig. 4 is a schematic structural view of a tibial adjustment mechanism embodying the present embodiment;
FIG. 5 is a schematic diagram of a structure embodying a trim component;
FIG. 6 is a schematic structural view of a femoral adjustment mechanism;
FIG. 7 is a schematic structural diagram embodying a drive assembly;
fig. 8 is a schematic structural view showing a protractor assembly.
In the figure, 1, central axis; 11. a handle; 12. an accommodation hole; 2. a tibial adjustment mechanism; 21. a drive block; 211. a chute; 212. a chamber; 22. a handle; 23. a tibial plate; 231. a groove; 3. a femoral adjustment mechanism; 31. a first insert post; 32. a femoral plate; 321. an extension portion; 322. a clamping part; 4. a fine tuning component; 41. an adjusting plate; 411. a limiting hole; 42. a limiting rod; 43. a gear rack; 44. a second driving gear; 45. a second knob; 5. a measuring mechanism; 51. a fixed seat; 511. a slider; 52. a measurement subject; 521. a slideway; 522. a slide hole; 523. a cavity; 53. a slide bar; 54. a measuring rod; 541. a sliding part; 542. an arc-shaped mating portion; 6. a drive assembly; 61. a rotating shaft; 62. a first drive gear; 63. a driven gear; 64. a strip rack; 65. a first knob; 7. an angle measuring component; 71. a second insert post; 72. a rotating ring; 73. a femoral bone locating plate; 74. a marker post; 75. a scale; 81. a gear lever; 82. a lower base plate; 83. an upper base plate; 84. screens subassembly.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A knee joint tissue balancer, as shown in figure 3, comprises a central shaft 1, a tibia adjusting mechanism 2 arranged on the central shaft 1, and a femoral adjusting mechanism 3 arranged at the upper end of the central shaft 1. The lower end of the central shaft 1 is also fixedly connected with a handle 11, and the handle 11 is perpendicular to the central shaft 1.
As shown in fig. 4, the tibia adjusting mechanism 2 includes a driving block 21 penetrating through the central shaft 1, the driving block 21 is connected to the central shaft 1 in a sliding manner along the axis of the central shaft 1, a tibia plate 23 is disposed on one side of the central shaft 1, the tibia plate 23 is disposed perpendicular to the central shaft 1, the driving block 21 can drive the tibia plate 23 to slide along the axial direction of the central shaft 1, and a fine adjustment assembly 4 for driving the femoral plate 32 to adjust a fine distance is further disposed on the driving block 21. And a handle 22 is fixedly connected to the side of the driving block 21 away from the tibial plate 23, so that a worker can hold the handle 11 with one hand and hold the handle 22 with the other hand to drive the driving block 21 and the central shaft 1 to slide relative to each other.
As shown in fig. 3 and 4, the fine adjustment assembly 4 includes an adjustment plate 41 inserted through the central shaft 1, the adjustment plate 41 is slidably connected to the central shaft 1 along the axis of the central shaft 1, the adjustment plate 41 abuts against the upper surface of the driving block 21 in an initial state, and the tibial plate 23 is fixed to one side of the adjustment plate 41; two limiting rods 42 are fixedly connected to the upper surface of the driving block 21, the limiting rods 42 are parallel to the central shaft 1, and a limiting hole 411 for accommodating the limiting rods 42 is formed in the position, corresponding to the limiting rods 42, of the adjusting plate 41, so that the relative rotation of the adjusting plate 41 and the central shaft 1 is limited in the process of mutual sliding of the adjusting plate and the central shaft 1, and the tibial plate 23 cannot rotate in the process of sliding of the adjusting plate 41; a gear rack 43 is fixedly connected to the lower surface of the adjusting plate 41, the gear rack 43 is parallel to the axis of the central shaft 1, a sliding groove 211 for accommodating the gear rack 43 is formed in the upper surface of the driving block 21, a chamber 212 communicated with the sliding groove 211 is formed in the driving block 21, a second driving gear 44 is arranged in the chamber 212, the second driving gear 44 is rotatably connected with the inside of the driving block 21, the second driving gear 44 is meshed with the gear rack 43, a second knob 45 is arranged on one side of the driving block 21 away from the tibial plate 23, and the second knob 45 is coaxially and fixedly connected with the second driving gear 44. Through the rotation of the second knob 45, the second driving gear 44 is meshed with the gear rack 43, so as to drive the adjusting plate 41 to slide along the axial direction of the central shaft 1, thereby realizing the fine adjustment effect on the tibial plate 23.
As shown in fig. 6, the upper end surface of the central shaft 1 is opened with a circular receiving hole 12 (here shown in fig. 4), the femur adjusting mechanism 3 includes a first inserting column 31 inserted into the receiving hole 12, the first inserting column 31 is fixed with a femoral plate 32 on the same side of the tibial plate 23, and a measuring mechanism 5 is arranged above the femoral plate 32.
As shown in fig. 6, tibial plate 23 is U-shaped, so that when tibial plate 23 is inserted between the tibia and the femur of the knee joint, the middle region of tibial plate 23 can avoid the tissue connecting the tibia and the femur, so that tibial plate 23 is inserted more deeply, and the stability of tibial plate 23 is improved. And two recesses 231 have been seted up to tibial plate 23's lower surface, and recess 231 is located the shin bone terminal surface and corresponds the department to increased tibial plate 23 and the area of contact of shin bone terminal surface, made the shin bone terminal surface atress more stable, difficult cause because of the too big bone face deformation condition emergence that leads to of distraction force.
As shown in fig. 6, the femoral plate 32 is U-shaped as a whole, and the femoral plate 32 includes an extension portion 321 that is close to the tibial plate 23, and a locking portion 322 that is parallel to the tibial plate 23. The upper surface of the femoral plate 32 retaining portion 322 is flush with the upper end surface of the central shaft 1, and the circumference of the central shaft 1 is provided with scale marks along the length direction of the central shaft 1, and the position of the central shaft 1 on the upper surface of the femoral plate 32 retaining portion 322 is set as zero scale. When the worker measures the knee bending gap, the sliding positions of the driving block 21 and the central shaft 1 are adjusted, so that the tibial plate 23 and the femoral plate 32 are abutted, then the femoral plate 32 and the tibial plate 23 are inserted into a gap between the femur and the tibia, and then the tibial plate 23 is driven to slide in a direction away from the femoral plate 32 by the mutual sliding between the driving block 21 and the central shaft 1, the sliding position of the driving block 21 cannot be accurately controlled under the influence of the friction force between the central shaft 1 and the driving block 21, sometimes the sliding speed of the driving block 21 is too high, so that the sliding position of the driving block 21 is too far, because of the limited clearance space, adjustment plate 41 will stop moving to reduce the damage to the body caused by drive block 21, and the operator can finely adjust the position of tibial plate 23 by second knob 45, thereby adjusting the tension of the medial and lateral muscles and at the same time, the gap distance can be visually known through the scale marks of the central shaft 1.
As shown in fig. 6, the measuring mechanism 5 includes a fixing base 51 fixedly connected to the upper end of the first insertion column 31, the fixing base 51 is perpendicular to the first insertion column 31 in the axial direction, a measuring main body 52 is disposed on the fixing base 51, a sliding hole 522 is disposed on the upper surface of the measuring main body 52, the axis of the sliding hole 522 is parallel to the central shaft 1, a sliding rod 53 is inserted into the sliding hole 522, a measuring rod 54 is slidably connected to the upper end of the sliding rod 53, and a driving assembly 6 for driving the sliding rod 53 to slide back and forth along the length direction of the sliding hole 522 is further disposed on the measuring main body 52.
As shown in fig. 7, two cross sliders 511 are fixedly connected to the upper surface of the fixing base 51, the length direction of the slider 511 is arranged in the same direction as the opening direction of the tibial plate 23, and two slide ways 521 matched with the slider 511 are formed on the upper surface of the measuring main body 52, so that the measuring main body 52 and the fixing base 51 are connected with each other, and the measuring main body 52 and the fixing base 51 are slid with each other.
As shown in fig. 7, a cavity 523 is provided in the measuring body 52, the driving assembly 6 includes a rotating shaft 61 provided in the measuring body 52, the rotating shaft 61 is rotatably connected to the inner wall of the measuring body 52, and the length directions of the rotating shaft 61 and the sliding block 511 are parallel to each other; a first driving gear 62 is fixedly connected to the peripheral surface of the rotating shaft 61, a driven gear 63 is rotatably connected to the inside of the measuring body 52, and the first driving gear 62 and the driven gear 63 are meshed with each other; a strip-shaped rack 64 is fixedly connected to the outer peripheral surface of the sliding rod 53 along the length direction of the sliding rod 53, and the driven gear 63 is meshed with the strip-shaped rack 64; the outer wall of the measuring body 52 is further provided with a first knob 65, and the first knob 65 is coaxially and fixedly connected with the rotating shaft 61. By rotating the first knob 65 and then by the mutual engagement of the first driving gear 62, the driven gear 63 and the strip rack 64, the sliding rod 53 is driven to slide along the length direction of the sliding hole 522, so as to adjust the measuring position of the measuring rod 54.
As shown in fig. 7, the measuring rod 54 includes a sliding portion 541 slidably connected to the sliding rod 53 and an arc-shaped engaging portion 542 fixed to an end of the sliding portion 541. When a worker measures the knee bending gap, the femoral plate 32 and the tibial plate 23 are inserted in the knee joint, then the sliding position of the measuring main body 52 and the fixed seat 51 is adjusted, the measuring main body 52 is attached to the end of the femur, then the second knob 45 is rotated, the lifting position of the sliding rod 53 is adjusted, the measuring rod 54 corresponds to the position of the femoral condyle, finally, the arc-shaped matching part 542 of the measuring rod 54 is attached to the spherical contour of the femoral condyle through the mutual sliding of the measuring rod 54 and the sliding rod 53, so that the measuring accuracy is improved, scale marks are arranged on the sliding part 541 of the measuring rod 54, so that the worker can clearly know the sliding relative position of the measuring rod 54 and the sliding rod 53 through the scale marks, the size of the femoral condyle can be determined, the size of the femoral condyle can be measured without using other instruments in the operation, and the operation time is reduced, the operating efficiency is improved.
As shown in fig. 8, the upper end of the central shaft 1 is also detachably connected with an angle measuring assembly 7 for measuring the valgus angle of the femur. The angle measuring component 7 comprises a second inserting column 71 inserted at the upper end of the central shaft 1, a rotating ring 72 is sleeved at the upper end of the second inserting column 71, the rotating ring 72 is rotatably connected with the second inserting column 71, the rotating shaft 61 of the rotating ring 72 and the second inserting column 71 is parallel to the arrangement direction of the tibial plate 23, a femoral limiting plate 73 is fixedly connected to one side of the rotating ring 72 facing the tibial plate 23, and the femoral limiting plate 73 is the same as the tibial plate 23 in size; a mark rod 74 is fixedly connected to the upper end of the second inserting column 71 along the axial direction of the central shaft 1, a scale 75 is fixedly connected to the upper surface of the rotating ring 72, the middle of the scale 75 is zero-scaled, and the numerical values of the middle of the scale 75 are sequentially increased towards two sides. When femoral limit plate 73 is in the initial state, femoral limit plate 73 and tibial plate 23 are parallel to each other, and marker post 74 points to zero scale of scale 75. When the staff measures and straightens the clearance, insert simultaneously shin plate 23 and thighbone limiting plate 73 and establish in the gap of the thighbone of knee joint and shin bone, then the slip regulation shin plate 23 displacement of accessible drive block 21, thereby measure and straighten the gap, the thighbone terminal department that thighbone limiting plate 73 supported in addition, because the difference of the terminal inside and outside of thighbone, can drive thighbone limiting plate 73 and take place the angle deflection, thereby be convenient for the art person through the audio-visual angle of turning up of seeing out the thighbone of numerical value on scale 75, so that make reasonable osteotomy scheme.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The utility model provides a knee joint tissue balancer, includes center pin (1), and center pin (1) is provided with the scale, and center pin (1) slides and is connected with a driving block (21), and one side of driving block (21) is provided with a shin lamella (23), and center pin (1) top is provided with one and shin lamella (23) cooperation femoral lamella (32) of using, its characterized in that: the femoral plate (32) is provided with a measuring mechanism (5) for measuring the size of a condyle of the femur;
the measuring mechanism (5) comprises a measuring main body (52) connected above the femoral plate (32), a sliding rod (53) is connected to the measuring main body (52) in a sliding mode along the axial direction of the central shaft (1), a measuring rod (54) is vertically arranged on the sliding rod (53), and the measuring rod (54) is connected with the sliding rod (53) in a sliding mode.
2. The knee joint tissue balancer of claim 1, wherein: the measuring rod (54) comprises an arc-shaped matching part (542) used for being attached to and clamped with the femoral condyle and a sliding part (541) arranged at one end of the arc-shaped matching part (542), and the sliding part (541) is connected with the sliding rod (53) in a sliding mode.
3. The knee joint tissue balancer of claim 1, wherein: the femur plate (32) is fixedly connected with a fixed seat (51), the fixed seat (51) is fixedly connected with a sliding block (511), the measuring main body (52) is provided with a sliding way (521) matched with the sliding block (511), and the axial direction of the sliding way (521) is the same as the extending direction of the femur plate (32).
4. The knee joint tissue balancer of claim 1, wherein: the femoral plate (32) and the tibial plate (23) are integrally U-shaped, and in an initial state, the femoral plate (32) and the tibial plate (23) are attached to each other.
5. A knee tissue balancer as claimed in claim 2, wherein: the measuring main body (52) is provided with a sliding hole (522), the axial direction of the sliding hole (522) is parallel to the axial direction of the central shaft (1), and a driving assembly (6) for driving the sliding rod (53) to slide along the axial direction of the sliding hole (522) is arranged in the measuring main body (52);
drive assembly (6) are connected including setting up axis of rotation (61) in measuring main part (52), axis of rotation (61) and measurement main part (52) inner wall rotation, and the one end rigid coupling of axis of rotation (61) has a first knob (65), the coaxial rigid coupling in global of axis of rotation (61) has a first driving gear (62), it has a driven gear (63) to measure main part (52) internal rotation and be connected with, first driving gear (62) and driven gear (63) intermeshing, the axial along slide bar (53) is provided with a bar rack (64) on slide bar (53), driven gear (63) and bar rack (64) intermeshing.
6. The knee joint tissue balancer of claim 1, wherein: a fine adjustment component (4) for fine adjustment of the tibial plate (23) is arranged on the driving block (21),
the fine adjustment assembly (4) comprises an adjusting plate (41) which is arranged above the driving block (21) and connected with the central shaft (1) in a sliding manner, and the tibial plate (23) is fixedly connected to one side of the adjusting plate (41); the axis rigid coupling of center pin (1) is followed to regulating plate (41) lower surface has a rack (43), drive block (21) one side is rotated and is connected with a second knob (45), and the coaxial rigid coupling of second knob (45) has a second driving gear (44), second driving gear (44) and rack (43) intermeshing.
7. The knee joint tissue balancer of claim 1, wherein: the femoral plate (32) is detachably connected with the central shaft (1), a containing hole (12) is formed in the central shaft (1), and an angle measuring assembly (7) is detachably connected to the central shaft (1);
angle measuring subassembly (7) include that the second inserts post (71), and the rigid coupling has a sighting rod (74) on post (71) is inserted to the second, the second is inserted and is rotated on post (71) and be connected with a swivel ring (72), and the rigid coupling has a scale (75) on swivel ring (72), and the middle part of scale (75) is zero scale to increase in proper order to both sides, and the homonymy rigid coupling that swivel ring (72) are located tibial plate (23) has a stock limiting plate (73), and when femoral limiting plate (73) and tibial plate (23) were parallel to each other, the zero scale of the directional scale (75) of sighting rod (74).
8. The knee joint tissue balancer of claim 1, wherein: the lower surface of the tibia plate (23) is provided with a groove (231) at the joint with the tibia bone surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010427006.2A CN111643195A (en) | 2020-05-19 | 2020-05-19 | Knee joint tissue balancer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010427006.2A CN111643195A (en) | 2020-05-19 | 2020-05-19 | Knee joint tissue balancer |
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| CN111643195A true CN111643195A (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010427006.2A Pending CN111643195A (en) | 2020-05-19 | 2020-05-19 | Knee joint tissue balancer |
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| CN112155651A (en) * | 2020-09-25 | 2021-01-01 | 北京市春立正达医疗器械股份有限公司 | Tibia osteotomy measurer |
| CN112754594A (en) * | 2021-01-21 | 2021-05-07 | 北京力达康科技有限公司 | Single-side lead screw adjusting type bone cutting device for femoral condyle |
| CN113855346A (en) * | 2021-10-12 | 2021-12-31 | 复旦大学附属中山医院 | A knee joint bone surface replacement device |
| CN114376662A (en) * | 2020-10-16 | 2022-04-22 | 苏州微创关节医疗科技有限公司 | Positioning means |
| CN115040265A (en) * | 2022-05-31 | 2022-09-13 | 北京市春立正达医疗器械股份有限公司 | A knee joint space balancer |
| CN115040266A (en) * | 2022-05-31 | 2022-09-13 | 北京市春立正达医疗器械股份有限公司 | Knee joint knee bending gap balancer |
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Application publication date: 20200911 |
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