CN208910334U - Knee space retractor - Google Patents
Knee space retractor Download PDFInfo
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- CN208910334U CN208910334U CN201721469104.2U CN201721469104U CN208910334U CN 208910334 U CN208910334 U CN 208910334U CN 201721469104 U CN201721469104 U CN 201721469104U CN 208910334 U CN208910334 U CN 208910334U
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- handle
- component
- connecting rod
- knee space
- transmission member
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- 210000003127 knee Anatomy 0.000 title claims abstract description 82
- 230000005540 biological transmission Effects 0.000 claims abstract description 66
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 28
- 210000002303 tibia Anatomy 0.000 claims abstract description 9
- 210000000689 upper leg Anatomy 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims description 17
- 241001227561 Valgus Species 0.000 claims description 7
- 210000000629 knee joint Anatomy 0.000 abstract description 24
- 238000005259 measurement Methods 0.000 abstract description 6
- 210000004872 soft tissue Anatomy 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000013150 knee replacement Methods 0.000 description 4
- 210000003041 ligament Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001356 surgical procedure Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002316 cosmetic surgery Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- Orthopedics, Nursing, And Contraception (AREA)
Abstract
This application provides a kind of knee space retractors, comprising: pedestal；Column vertically extends from pedestal and firmly fixes with pedestal；The first in command fixedly couples or is formed as one with pedestal；Second handle is in the top of the first in command and can slide along column；First struts component, is used to contact the osteotomy surface of the distal femur of patient；And second strut component, is used to contact the osteotomy surface of the proximal tibia of patient, and removably couple with second handle；Wherein, further includes: force transmission member and can slide the top in second handle along column, and first struts component and removably couple with force transmission member；And spring, extend between pedestal and force transmission member along column.The tough tensile force of belt of real-time measurement may be implemented using spring by the application and knee joint struts gap, and accurate force value is shown, and doctor has direct hand to feel tough tensile force of belt size, and operation is convenient, it is simple to strut mode, efficiently.
Description
Technical field
This application involves for bone surgery medical instrument more particularly to a kind of knee pass in knee replacements
Internode gap retractor.
Background technique
Total knee replacement is a kind of kneed using bioartificial materials' displacement human lesion knee joint, recovery
The plastic surgery operations of normal physiological function.During surgery, doctor needs to carry out the knee joint of patient to characterize osteotomy and goes forward side by side
Row soft tissue balance art restores optimal knee joint stable form to match artificial knee joint prosthesis.
After to proximal tibia, distal femur osteotomy, usually existed with the die trial of gap cushion block or Template measurement knee joint
Stretch position and buckling position gap and tough tensile force of belt.Doctor is according to the kneed illness of sufferer to knee space and tough tensile force of belt
It is adjusted, helping to rebuild natural joint face and obtain the correct lower limb line of force, restoring knee ligament balance and ensureing people
The stability in work joint.In general, doctor, which directly determines knee joint with knee space retractor, struts gap and tough
Tensile force of belt with aided assessment knee osteotomy amount and carries out soft tissue balance art.
Used in current knee replacements, the retractor that can complete similar functions be broadly divided into two types: it is active
Type and passive.Active type retractor detects tough tensile force of belt by electric signal or measurement knee joint struts gap.Due to introducing
Power supply, active type retractor belongs to the II class instrument in medical instrument, there are moderate risk, need strict control to guarantee it
Safety, validity, so the production cost of such product is usually higher.Passive retractor is strutted by the way of mechanical energy
Knee space belongs to I class instrument, needs Routine Management control to can guarantee its safety, validity, and its production cost is opposite
Want low, high stability.
However, current passive retractor generally only struts between knee joint comprising need in knee replacements to realize
Gap obtains tough tensile force of belt and judges the partial function in knee joint in the functions such as valgus angle, and there are complicated for operation, instruments to set
Meter does not consider kneed physiological structure, appliance function only for unilateral knee joint or obtains the defects of data are not direct, Yi Zao
At delay operating time, influence the risks such as doctor's judgement.In addition, being designed a variety of due to the demand for needing to match left and right knee
Weapon's standard also will increase processing cost, transportation cost and management cost.
Therefore, it is necessary to a kind of accurate knee space retractors of multi-functional, easy to use and indicating value.
Utility model content
The purpose of the application be in order to overcome the problems, such as at least one or more present in existing knee space retractor,
It proposes a kind of improved knee space retractor, is capable of providing more functions, and easy to use.
For this purpose, providing a kind of knee space retractor according to the one side of the application, comprising:
Pedestal；
Column, the column vertically extend from the pedestal and firmly fix with the pedestal；
The first in command, the first in command fixedly couple or are formed as one with the pedestal；
Second handle, the second handle are in the top of the first in command and can slide along the column；
First struts component, and described first struts the osteotomy surface of distal femur of the component for contacting patient；And
Second struts component, and described second struts the osteotomy surface of proximal tibia of the component for contacting the patient, and with
The second handle removably couples；
Wherein, the knee space retractor further include:
Force transmission member, the force transmission member are in the top of the second handle and can slide along the column,
And described first struts component and removably couples with the force transmission member；With
Spring, the spring extend between the pedestal and the force transmission member along the column.
Preferably, the knee space retractor further includes the first parallel transmission mechanism, the described first parallel transmitting machine
Structure includes at least a pair of links, and described at least a pair of links includes the first connecting rod and second connecting rod of equal length, and described first
Connecting rod and the second connecting rod are hinged in the first midpoint, and connect in one end of the first connecting rod of the same side and described second
One end of bar is respectively hinged on the first in command and the second handle, in the other end of the first connecting rod of the other side
The sliding slot of the second handle and the cunning of the first in command are respectively slidably hinged on the other end of the second connecting rod
In slot, and the torsional spring tend to separate out out the first in command and the second handle is equipped in first midpoint
Or spring leaf.
Preferably, the knee space retractor further includes the second parallel transmission mechanism, the described second parallel transmitting machine
Structure includes that at least a pair of links, described at least a pair of links includes the third connecting rod and fourth link of equal length, the third
Connecting rod and the fourth link are hinged in the second midpoint, and connect in one end of the third connecting rod of the same side and the described 4th
One end of bar is respectively hinged on the second handle and the force transmission member, the other side the third connecting rod it is another
The other end of end and the fourth link is respectively slidably hinged on the sliding slot and the second handle of the force transmission member
Sliding slot in, and second midpoint be equipped with tend to separate out out the second handle and the force transmission member
Torsional spring or spring leaf.
Preferably, the knee space retractor further includes strutting gap registration scale, described to strut gap registration mark
Ruler is arranged on the force transmission member or the second handle.
Preferably, the knee space retractor further includes gap locking member, and the gap locking member is set
At to lock the gap between the second handle and the force transmission member.
Preferably, the knee space retractor further includes distracting force registration scale, and the distracting force registration scale is set
It sets on the column.
Preferably, it described first struts component and can rotate or lock relative to the force transmission member and/or described the
Two, which strut component, to rotate or lock relative to the second handle.
Preferably, it described first struts component and is removably coupled with the force transmission member by first connecting rod, institute
It states second and struts component and removably coupled with the second handle by the second connecting rod, the first connecting rod and described the
Two connecting rods are configured to respectively be inverted after dismantling from the force transmission member and the second handle, so
It is turned back to respectively afterwards to the force transmission member and the second handle.
Preferably, the knee space retractor further includes the interior angle display that turns up, the interior valgus angle instruction
Device fixedly couples with the force transmission member, to indicate that described first struts component or described second strut in component and turn up
Angle, the interior angle display that turns up are arranged on the first connecting rod or second connecting rod, and correspondingly described
First struts component or described second struts component equipped with indicating section.
Preferably, the spring bears precompression, and the precompression between the force transmission member and the pedestal
Greater than when the knee space retractor is in original state by the total weight of the spring-supported component.
Preferably, the knee space retractor includes handle locking component, and the handle locking component is configured to
It is separate relative to the first in command to limit the second handle.
Preferably, the handle locking component includes the ratchet bar hinged with the first in command and is arranged described second
Pawl on handle, and the ratchet bar is kept by the deflecting force that torsional spring or spring leaf apply with the pawl in hinged place
Engagement.
Compared with current knee space retractor, the application at least has in following one or more aspects apparent
Benefit.For example, the tough tensile force of belt of real-time measurement may be implemented using spring and knee joint struts gap, and there is biggish spring travel
It is shown with accurate force value；Doctor has direct hand to feel the size of tough tensile force of belt；Operate it is convenient, strut mode letter
It is single, efficient；Left and right knee joint can complete operation etc. with a set of machinery.
Detailed description of the invention
The exemplary embodiment of the application is described in detail below with reference to accompanying drawings, it should be appreciated that retouch below
The embodiment stated is only used for explaining the application, rather than limits scope of the present application, in which:
Fig. 1 is the perspective view for showing knee space retractor according to an embodiment of the present application；
Fig. 2 is the front view of knee space retractor shown in FIG. 1；
Fig. 3 is the cross-sectional view of knee space retractor shown in FIG. 1；
Fig. 4 is another perspective view for showing knee space retractor shown in FIG. 1, wherein eliminating first struts component
Component is strutted with second；
Fig. 5 is cross-sectional view made by line A-A in Fig. 3, is shown first and struts component and second and struts component
Internal structure.
Specific embodiment
Preferred embodiment of the present application is described in detail below with reference to example.But it will be understood by those skilled in the art that
These exemplary embodiments are not meant to form any restrictions to the application.In addition, in the absence of conflict, the application's
Feature in embodiment and embodiment can be combined with each other.In the accompanying drawings, for simplicity, other components, but this is omitted
The knee space retractor for not indicating the application not may include other components.
Referring to FIG. 1, FIG. 2 and FIG. 3, wherein figure 1 illustrate knee space retractors according to an embodiment of the present application
Perspective view, Fig. 2 and Fig. 3 are the front view and cross-sectional view of knee space retractor shown in FIG. 1 respectively.Such as Fig. 1 and Fig. 2 institute
Show, knee space retractor mainly includes pedestal 10, column 11, the first in command 12, second handle 13, force transmission member 20,
One, which struts component 41 and second, struts component 42.Column 11 can vertically upwardly extend from pedestal 10 and consolidate securely with pedestal 10
It is fixed.The first in command 12 can fixedly couple with pedestal 10 or be formed as one and (be formed as piece component).Second handle 13
It top in the first in command 12 and can be slided along column 11.First struts distal femur of the component 41 for contacting patient
Osteotomy surface, and second struts the osteotomy surface that component 42 is used to contact the proximal tibia of patient.In addition, the knee space of the application
Retractor may also include force transmission member 20 and spring 30.Force transmission member 20 is in the top of second handle 12 and can be along
Column 11 slides.Spring 30 can extend between pedestal 10 and force transmission member 20 along column 11.First, which struts component 41, to pass through
First connecting rod 47 removably couples with force transmission member 20, and second strut component 42 can be by the second connecting rod 48 and
Second chief 13 removably couples.The knee of component 42 is strutted as shown in figure 4, showing removal first and strutting component 41 and second
Joint space retractor 1.
According to an embodiment, spring 30 is preferably the simple cylindrical helical compression spring of structure, this is because its load
With deformation relationship curve close to straight line and its rigidity it is more stable.Spring 30 shown in fig. 1-3 can surround column 11 from pedestal 10
It upwardly extends, but can also extend in the inside of column 11 or side.Alternatively, it is also possible to use other types of spring, such as spiral shell
Revolve extension spring, disc spring etc..Certainly, using other types of spring, mechanism associated with spring may be needed
Correspondingly to adjust, it is this adjustment be it is well known, be not described in detail herein.
The knee space retractor of the application further includes separate relative to the first in command 12 to limit second handle 13
Handle locking component 50.According to an embodiment, handle locking component 50 may include the ratchet bar being arranged on the first in command 12
51 and the pawl 52 that is arranged on second handle 13.As shown in Fig. 2 and 3, the handle locking part for being not in mode of operation is shown
Part 50, wherein ratchet bar 51 is not engaged with pawl 52 by biasing.In operational state, the spine on 52 engaging ratchet teeth item 51 of pawl
Tooth to only pawl 52 be allowed to move down, but prevents pawl 52 from moving up.In handle locking component 50 and the first in command
Torsional spring or spring leaf can be set in 12 hinged place, to force ratchet bar 51 and pawl 52 to keep engagement.
In addition, in order to guarantee the first in command 12 and second when the first in command 12 and second handle 13 are grasped by doctor
13 keeping parallelism of handle in order to the parallel transmitting of power, and is transmitted to hand grip equivalently on spring 30, the knee of the application
Joint space retractor 1 may also include the first parallel transmission mechanism, which includes at least a pair of links, should
At least a pair of links includes first connecting rod 14 and second connecting rod 15.As illustrated in fig. 1 and 2, first connecting rod 14 and second connecting rod 15 exist
It is hinged at first midpoint 18 (visible in Fig. 3), and the equal length of first connecting rod 14 and second connecting rod 15.First connecting rod 14
Right side one end and right side one end of second connecting rod 15 are respectively hinged on the first in command 12 and second handle 13, first connecting rod 14
The left side other end of the left side other end and second connecting rod 15 is respectively slidably hinged on the sliding slot 17 and first of second handle 13
In the sliding slot 16 of handle 12.Connect in fig. 1 it is shown that a pair of of the intermediate position of the first in command 12 and second handle 13 is arranged in
Bar, however, it is also possible to which a pair of links is arranged in the either side in the first in command 12 and second handle 13.In addition, 14 He of first connecting rod
The connecting mode of the left and right ends of second connecting rod 15 can be exchanged mutually.
Similarly, in order to be convenient for the parallel transmitting of power during compressed spring 30, and keep the pressure of spring 30 equivalent
Ground, which is transmitted to first and struts component 41 and second, to be strutted on component 42, and the knee space retractor 1 of the application may also include
Two parallel transmission mechanisms, the second parallel transmission mechanism include at least a pair of links, and at least a pair of links includes third connecting rod for this
24 and fourth link 25.As shown in Fig. 1 and 2, third connecting rod 24 and fourth link 25 are hinged at the second midpoint 28, and third
The equal length of connecting rod 24 and fourth link 25.Left side one end of third connecting rod 24 and left side one end difference of fourth link 25
It is hinged on second handle 13 and force transmission member 20, the right side other end of third connecting rod 24 and the right side of fourth link 25 are another
End is respectively slidably hinged in the sliding slot 27 of force transmission member 20 and the sliding slot 26 of second handle 13.In fig. 1 and 2,
Two pairs of connecting rods of the two sides that second handle 13 and power transfer part 20 are set are shown, however, it is also possible in 13 He of second handle
A pair of links is arranged in the intermediate position of force transmission member 20.In addition, the connection of the left and right ends of third connecting rod 24 and fourth link 15
The mode of connecing can exchange mutually.
According to an embodiment, one in first connecting rod 14, second connecting rod 15, third connecting rod 24 and fourth link 25 or
At multiple either ends, limited block can be set, to limit the first parallel transmission mechanism and/or the second parallel transmission mechanism
By compression degree and/or it is extended degree.For example, the limited block 21 being arranged on first connecting rod 14 and setting are in fourth link 25
On limited block 22.
According to an embodiment, to make knee space retractor first strut component 41 and the second support in the initial state
It opens component 42 to be kept in contact, it is expected that second handle 13 and force transmission member 20 are drawn close as much as possible.For this purpose, in the first parallel transmitting
It can be set at the first connecting rod 14 of mechanism and the first midpoint 18 of second connecting rod 15 to make the first in command 12 and second handle
13 torsional springs tended to separate out out or spring leaf 19.As shown in figure 3, torsional spring or spring leaf 19 are to first connecting rod 14 and second connecting rod 15
Apply twisting resistance, so that first connecting rod 14 and second connecting rod 15 are hinged on the end on the first in command 12 or on second handle 13
Tend to draw close, so that second handle 13 be made to tend to move up.Alternatively, can also be in the third connecting rod of the second parallel transmission mechanism
24 and fourth link 25 the second midpoint 28 at torsional spring or spring leaf (not shown) are set so that second handle 13 and power pass
Component 20 is passed to tend to draw close.In the knee space retractor of the application, one or multiple torsional springs or bullet are either set
Reed, but the elastic force of torsional spring or spring leaf has no influence to the registration of distracting force under softened state.
According to an embodiment, to make knee space retractor directly display gap registration, in force transmission member 20 or the
It is settable on second chief 13 to strut gap registration scale 23, component 41 and second is strutted with instruction first and struts component 42 and is strutted
Knee joint between gap.It should be noted that the registration for strutting gap registration scale 23, which considers first, struts 41 He of component
Second struts the thickness of component 42.Therefore, doctor can be by strutting whether gap registration directly judges knee space
Have reached expected size.
According to an embodiment, gap locking member 29 is additionally provided on force transmission member 20 or second handle 13.Such as Fig. 1 institute
Show, be arranged when on second handle 13 strutting gap registration scale 23, gap locking member 29 can be setting and transmit in power
Clamping screw on component 20.When needed, clamping screw can be rotated, is fixed so that gap registration scale 23 will be strutted.
Certainly, strutting gap registration scale 23 also can be set on force transmission member 20, and gap locking member 29 then can be set
On second handle 13.
When knee space retractor struts the osteotomy surface of kneed distal femur and proximal tibia, doctor holds the
The power that leader 12 and second handle 13 are applied, which through spring 30 is transmitted to first and struts component 41 and second, struts component 42.When
When reaching equilibrium state, grip, spring force and tough tensile force of belt it is equal in magnitude.According to an embodiment, for the numerical value for showing the power,
Distracting force registration scale 32 is equipped on column 11.As shown in Figure 1, the upper end of column 11 is arranged in distracting force registration scale 32.First
When beginning state, it is contemplated that the stability of knee space retractor makes spring 30 by certain precompression in assembling.This is pre-
The numerical value of pressure is embodied on distracting force registration scale 32.Preferably, which is greater than in the initial state by 30 institute of spring
The total weight of the component of support.
As previously mentioned, first struts component 41 and second and struts component 42 and be detachably coupled to force transmission member 20 respectively
With second handle 13.According to an embodiment, first, which struts component 41, passes through axis 48 hingedly with first connecting rod 47.Such as Fig. 4 and Fig. 5
Shown, the first axis 45 for strutting component 41 is contained in the hole of first connecting rod 47, and can be fixed by locking bolt 44.When
When locking bolt 44 unscrews, first struts component 41 can be relative to first connecting rod 47 (that is, relative to force transmission member 20)
Rotation, so as to indicate situation of turning up in kneed.For this purpose, the knee space of the application retracts according to an embodiment
Device further includes the interior angle display 43 that turns up.The angle display 43 that inside turns up may be provided on first connecting rod 47, such as Fig. 5 institute
Show, such as is mounted on the side of first connecting rod 47 by way of inserting.Correspondingly, the side edge for strutting component 41 first
Equipped with indicating section 49,46, the indicating section 49,46 is close to the interior angle display 43 that turns up, so that strutting component 41 first
When strutting 42 keeping parallelism of component with second, the zero graduation for the angle display 39 that inside turns up is aligned with indicating section 49,46 (is scheming
It is only shown as being aligned with indicating section 49 in 5).The rotation for strutting component 41 with first, indicating section 49,46 is in interior valgus angle
Valgus angle registration in corresponding is indicated on indicator 43.Certainly, strutting component 42 with the second connecting rod 48 second is to pass through
In the case that axis is hinged, the angle display 43 that inside turns up be may also be arranged in the second connecting rod 48.In this case, correspondingly
Setting indicating section (not shown) on component 42 can be strutted second.
According to an embodiment, second struts component 42 and the second connecting rod 48 can be two components being linked together,
It can also be formed as one.First connecting rod 47 and the second connecting rod 48 are configured to respectively from 20 He of force transmission member
After dismantling on second handle 12, each self reversal is simultaneously turned back to again to force transmission member 20 and second handle 13 respectively, so that knee
Joint space retractor 1 for example from it is original can measure left knee joint and be converted to present can measure right knee joint.Correspondingly,
One connecting rod 47 and the second connecting rod 48 be constructed such that first strut component 41 and second strut component 42 be biased in by
The side of plane defined by column 11 and force transmission member 20, second handle 13 and/or the first in command 12.For example, such as Fig. 1 institute
Show, when doctor holds with a hand the knee space retractor of the application, first, which struts component 41 and second, struts the finger of component 42
Forwards and it is offset to the right side of the plane as defined by column 11 and force transmission member 20, second handle 13 and/or the first in command 12
Side can measure left knee joint at this time.After it first connecting rod 47 and the disassembly of the second connecting rod 48, will invert and turn back to, when
When doctor holds, first struts component 41 and second struts the left side that component 42 is directing forwardly but is offset to above-mentioned plane, at this time
Right knee joint can be measured.
The specific structure of knee space retractor according to an embodiment of the present application is described above by reference to attached drawing 1-5,
Below referring again to attached drawing 1-5, the operating process of the knee space retractor using the application is illustrated.
In the original state of knee space retractor, compression of the spring 30 by precompression, and second handle 13 is in example
As abutted against force transmission member 20 under the action of torsional spring or spring leaf 19.
Doctor, which can hold the first in command 12 and second handle 13 and strut component 41 and second for first, to be strutted component 42 and inserts
Enter to being completed in the knee joint of first osteotomy, making first, to strut component 41 corresponding with the osteotomy surface of distal femur, and the second support
It is corresponding with the osteotomy surface of proximal tibia to open component 42.
Then, doctor firmly can hold the first in command 12 and second handle 13, be transmitted to the grip of hand on spring 30,
And then drive first to strut component 41 and second and strut the pulling force that component 42 overcomes ligament, to strut kneed gap.At this point,
According to an embodiment, the first in command 12 and second handle 13 can be guaranteed always in parallel towards that by the first parallel transmission mechanism
This close direction is mobile, and can guarantee that first struts component 41 and second and strut component 42 by the second parallel transmission mechanism
Always separate direction is mobile towards each other in parallel.Therefore, the knee space retractor of the application can be passed by double parallel
It passs the mechanism guarantee first in command and second handle is Parallel Constraint always, and be flat always between second handle and force transmission member
Row constraint.Specifically, the grip of doctor is transmitted on spring 30 by handle, then by acting on while column 11 and spring 30,
It transfers force to first to strut on component 41, therefore, the distracting force as caused by spring 30 acts directly on section of femur and shin bone
On bone face, i.e., by holding the force reaction applied on the osteotomy surface of femur and shin bone, to strut knee space.When reaching
When to equilibrium state, grip, spring distracting force and tough tensile force of belt it is equal in magnitude.Refer on gap registration scale 23 at this point, strutting
Kneed gap is shown, and indicates distracting force on distracting force registration scale 32.
It should be noted that handle locking component 50 also exists when doctor firmly holds the first in command 12 and second handle 13
Real-time working makes the first in command 12 and second handle 13 will not be away from each other.Specifically, in the effect of torsional spring or spring leaf
Under, the pawl 52 on second handle 13 keeps engaging during holding handle with the ratchet bar 51 on the first in command 12.
With continuing firmly to hold the first in command 12 and second handle 13, struts gap and distracting force is gradually increased, work as support
When standard width of a room in an old-style house gap reaches expected, gap locking member 29 can be screwed as needed, made first to strut component 41 and second and strutted component
42 position is kept fixed, at this point, can read the pulling force of knee ligament from distracting force registration scale 32.In addition, matching
In the embodiment for having set the interior angle display that turns up, can also be read from the interior angle display 43 that turns up in kneed at this time
It turns up situation.According to interior angular readings of turning up, doctor can carry out soft tissue balance art.It is postoperative that soft tissue balance is completed in doctor
It is fixed by locking bolt 44 component 41 can be strutted by first as needed, make first strut component 41 lose rotary freedom and
42 keeping parallelism relationship of component is strutted with second.It certainly, can be before measurement starts if you do not need to situation of turning up in carrying out judges
Locking bolt 44 is screwed.
So far, doctor can be according to gap, distracting force and interior valgus angle be strutted, and auxiliary is completed soft tissue balance art or sentenced
Whether disconnected osteotomy amount meets operation needs.
Then, gap locking member 29 is unscrewed, then release handle locking component 50, knee space retractor can be made
1 returns to original state.
When needing to carry out other side knee surgery, component 41 and second directly can be strutted by first and strut component 42 and divide
It is not extracted from force transmission member 20 and second handle 13, then turns back to, can meet for the other side respectively after each self reversal
The space distraction of knee surgery and the function of soft tissue balance.
In addition, if strutting component 41 for first is replaced with gasket, then the knee space retractor of the application can be auxiliary
Help the thickness of determining gasket.In addition, joining after can carrying out if first struts the collocation osteotomy plate locating guider use of component 41
Examine osteotomy positioning.
The knee space retractor of the application uses the simple cylindrical helical compression spring of structure, realizes between strutting
The process of gap is completed by holding mode, and doctor is made to have direct hand to feel the size of tough tensile force of belt.In addition, being carried using spring
Lotus and its deformation relationship curve make elastic deformation amount and the knee joint of spring close to linear type and the more stable characteristic of its rigidity value
Tough tensile force of belt after strutting gap is equal, and after retractor struts knee space, support caused by the compression deformation of spring
The pulling force of opening force and knee ligament is that equivalence is reversed, struts gap so as to the tough tensile force of belt of real-time measurement and knee joint, and
And the relationship that the stroke of doctor's handgrip part and the stroke of spring are 1:1, there are biggish spring travel and accurate force value aobvious
Show.In the knee space retractor of the application, some being inserted into knee space struts component and retains a rotation
Freedom degree can then show situation of turning up in knee joint, carry out knee joint soft tissue balance art to doctor and provide effective foundation.Separately
Outside, the locking of the knee space retractor of the application/release process is easy to operate, saves the time, the simple and reliable property of structure
It is good.
The application is described in detail in conjunction with specific embodiments above.Obviously, above description and show in the accompanying drawings
Embodiment out should be construed as illustratively, without constituting the limitation to the application.For those skilled in the art
Speech, can carry out various variations or modifications to it in the case where not departing from spirit herein, these variations or modifications are not
It is detached from scope of the present application.
Claims (12)
1. a kind of knee space retractor, comprising:
Pedestal (10)；
Column (11), the column vertically extend from the pedestal (10) and firmly fix with the pedestal (10)；
The first in command (12), the first in command fixedly couple or are formed as one with the pedestal (10)；
Second handle (13), the second handle are in the top of the first in command (12) and can be sliding along the column (11)
It is dynamic；
First struts component (41), and described first struts the osteotomy surface of distal femur of the component for contacting patient；And
Second struts component (42), described second strut component for contact the patient proximal tibia osteotomy surface, and with
The second handle (13) removably couples；
It is characterized in that, the knee space retractor further include:
Force transmission member (20), the force transmission member are in the top of the second handle (13) and can be along the columns
(11) it slides, and described first struts component (41) and removably couple with the force transmission member (20)；With
Spring (30), the spring prolong between the pedestal (10) and the force transmission member (20) along the column (11)
It stretches.
2. knee space retractor according to claim 1, which is characterized in that the knee space retractor also wraps
The first parallel transmission mechanism is included, the first parallel transmission mechanism includes that at least a pair of links, described at least a pair of links includes
The first connecting rod (14) and second connecting rod (15) of equal length, the first connecting rod (14) and the second connecting rod (15) are first
It is hinged at midpoint (18), and distinguish in one end of the first connecting rod (14) of the same side and one end of the second connecting rod (15)
It is hinged on the first in command (12) and the second handle (13), in the other end of the first connecting rod (14) of the other side
The sliding slot and described first of the second handle (13) is respectively slidably hinged on the other end of the second connecting rod (15)
In the sliding slot of handle (12), and it is equipped at first midpoint (18) to make the first in command (12) and described second
The torsional spring or spring leaf (19) that handle (13) tends to separate out out.
3. knee space retractor according to claim 1, which is characterized in that the knee space retractor also wraps
The second parallel transmission mechanism is included, the second parallel transmission mechanism includes that at least a pair of links, described at least a pair of links includes
The third connecting rod (24) and fourth link (25) of equal length, the third connecting rod (24) and the fourth link (25) are second
It is hinged at midpoint (28), and distinguish in one end of the third connecting rod (24) of the same side and one end of the fourth link (25)
Be hinged on the second handle (13) and the force transmission member (20), the other side the third connecting rod (24) it is another
The other end of end and the fourth link (25) is respectively slidably hinged on the sliding slot of the force transmission member (20) and described
In the sliding slot of second handle (13), and it is equipped at second midpoint (28) to make the second handle (13) and described
The torsional spring or spring leaf that force transmission member (20) tends to separate out out.
4. knee space retractor according to claim 1, which is characterized in that the knee space retractor also wraps
It includes and struts gap registration scale (23), the gap registration scale that struts is arranged in the force transmission member (20) or described second
On handle (13).
5. knee space retractor according to claim 4, which is characterized in that the knee space retractor also wraps
It includes gap locking member (29), the gap locking member is configured to pass to lock the second handle (13) and the power
Pass the gap between component (20).
6. knee space retractor according to claim 1, which is characterized in that the knee space retractor also wraps
Distracting force registration scale (32) is included, the distracting force registration scale is arranged on the column (11).
7. knee space retractor according to claim 1, which is characterized in that described first struts component can be opposite
Strutting component in the force transmission member (20) rotation or locking and/or described second can be relative to the second handle
(13) it rotates or locks.
8. knee space retractor according to claim 7, which is characterized in that described first, which struts component (41), passes through
First connecting rod (47) removably couples with the force transmission member (20), and described second struts component (42) connects by second
Extension bar (48) removably couples with the second handle (13), the first connecting rod (47) and second connecting rod
(48) it is configured to after the disassembly from the force transmission member (20) and the second handle (13) respectively carry out anti-
Turn, then turns back to respectively to the force transmission member (20) and the second handle (13).
9. knee space retractor according to claim 8, which is characterized in that the knee space retractor also wraps
It turning up angle display (43) in including, the interior angle display that turns up fixedly couples with the force transmission member (20), with
Indicate that described first struts component (41) or described second strut the interior valgus angle of component (42), the interior valgus angle instruction
Device (43) setting described first struts component on the first connecting rod (47) or second connecting rod (48), and correspondingly
(41) or described second struts component (42) equipped with indicating section.
10. knee space retractor according to claim 1, which is characterized in that the spring (30) passes in the power
It passs and bears precompression between component (20) and the pedestal (10), and the precompression is greater than in the knee space retractor
By the total weight of the component of the spring (30) support when in original state.
11. knee space retractor according to claim 1, which is characterized in that the knee space retractor packet
It includes handle locking component (50), the handle locking component is configured to limit the second handle (13) relative to described first
Handle (12) is separate.
12. knee space retractor according to claim 11, which is characterized in that handle locking component (50) packet
The pawl (52) for including the ratchet bar (51) hinged with the first in command (12) and being arranged on the second handle (13), and institute
Ratchet bar (51) is stated to be kept engaging with the pawl (52) by the deflecting force that torsional spring or spring leaf apply in hinged place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721469104.2U CN208910334U (en) | 2017-11-07 | 2017-11-07 | Knee space retractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721469104.2U CN208910334U (en) | 2017-11-07 | 2017-11-07 | Knee space retractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208910334U true CN208910334U (en) | 2019-05-31 |
Family
ID=66691283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721469104.2U Withdrawn - After Issue CN208910334U (en) | 2017-11-07 | 2017-11-07 | Knee space retractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208910334U (en) |
Cited By (1)
| 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 |
-
2017
- 2017-11-07 CN CN201721469104.2U patent/CN208910334U/en not_active Withdrawn - After Issue
Cited By (2)
| 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 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190531 Effective date of abandoning: 20240520 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190531 Effective date of abandoning: 20240520 |