CN207970103U - Vertebra vertebra section dilator - Google Patents
Vertebra vertebra section dilator Download PDFInfo
- Publication number
- CN207970103U CN207970103U CN201720465847.6U CN201720465847U CN207970103U CN 207970103 U CN207970103 U CN 207970103U CN 201720465847 U CN201720465847 U CN 201720465847U CN 207970103 U CN207970103 U CN 207970103U
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- Prior art keywords
- nail
- rod
- supporting rod
- vertebra
- distance
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Abstract
The utility model provides a kind of vertebra vertebra section dilator, including strutting nail and positioning device；The positioning device includes multiple supporting rods；The distance between described supporting rod can be adjusted；Multiple nails that strut are corresponded with multiple supporting rods；The nail that struts can be with the supporting rod nested encryptions.Vertebra vertebra section dilator provided by the utility model use the trepanning of screw tail portion, the structure that matched supporting rod is inserted, avoid in the course of surgery screw in place after, the larger supporting rod in cross section damages peripheral nerve tissue again insertable into human body.
Description
Technical field
The utility model is related to a kind of surgical operation medical equipments, and in particular, to vertebra vertebra section dilator.
Background technology
People needs to constantly change position to alleviate waist stress, but as social work is lived when completing various work
The variation of custom, race of office are chronically at that a certain position is constant, and local accumulation can be caused to damage, be especially chronically at
Faulty posture is easier to cause the diseases such as disc herniation.Non-damaging expectant treatment is selected when the state of an illness is lighter or has damage
Minimally Interventional Therapy etc. when such treatment is invalid, then must carry out operative treatment.Lumbar spinal fusion and artificial disc replacement
As relatively common two methods, require the dilator of high intensity that support is fixed in the course of surgery.
In the prior art, it is separately fixed on two pieces of vertebras by two screws, then adjust dilator two strut
The position of bar makes two equipped with trepanning strut rod set on screw, then adjusts and fix two and strut the distance between bar, reaches
To the effect of fixed support.But what the technology provided struts bar section more than screw section, and during being inserted in, strutting bar may
The nerve fiber for peripheral part of performing the operation is damaged, and can be free to slide along screw axial direction, influences fixed effect
Fruit.It needs to back-out screw again after taking out dilator after operation, perienchyma may be damaged again.
Utility model content
For the defects in the prior art, the purpose of this utility model is to provide a kind of vertebra vertebra section dilator.
According to vertebra vertebra section dilator provided by the utility model, including strutting nail and positioning device；
The positioning device includes multiple supporting rods；
The distance between described supporting rod can be adjusted；
Multiple nails that strut are corresponded with multiple supporting rods；
The nail that struts can be with the supporting rod nested encryptions.
Preferably, the positioning device also includes distance rod and distance adjustor；
The supporting rod includes fixed supporting rod and movable support rod；
The fixed supporting rod is fixed on one end of the distance rod；
The movable support rod is connect with the distance adjustor；
Distance adjustor can adjust position of the movable support rod in distance rod axial direction.
Preferably, the nail that struts includes nail head, nail rod portion and nail tail portion；
The nail head, nail rod portion and nail tail portion are sequentially connected；
Tail portion is axially disposed trepanning for nail；
The distal end of the supporting rod can be nested in the trepanning.
Preferably, the bar that struts in axial direction is provided with through-hole；
It includes elastic component and clamping block to strut bar；
The elastic component is located in the through-hole；
Elastic component is fixedly connected with hole wall；
Clamping block is fixedly connected with elastic component；
Clamping block can switch between harvesting state and thorn do well both states；
Under the harvesting state, clamping block is located in through-hole, and elastic component is in reducing condition；
The thorn does well down, and clamping block extends across along through-hole radial direction and struts bar outer wall.
Preferably, multiple annular grooves are in axial direction uniformly arranged in the nail tail portion trepanning；
The clamping block is extend into the case where the thorn does well in the annular groove.
Preferably, the elastic component is elastic piece；
There are multiple elastic pieces；Multiple elastic pieces, which can be formed, holds bar space；
The geometric center for holding bar space is located on the central axes of through-hole.
Preferably, also include to twist bar；
The stubborn bar includes club head, bar transition part, rod body, bar tail portion；
The club head, bar transition part, rod body, bar tail portion are sequentially connected；
The stubborn bar is inserted into the through-hole for strutting bar；
Stubborn bar can pass through the appearance bar space and cause the change for holding bar spatial geometric shape, twist bar by squeezing elasticity
Part driving clamping block is moved to thorn by harvesting state and does well.
Preferably, which is characterized in that the bottom surface for strutting nail trepanning is provided with and club head shape matching groove；
The club head is inserted into groove, and is limited stubborn bar and strutted the circumferentially opposed movement between nail；
The bar tail portion is equipped with and screws structure.
Preferably, the club head cross sectional shape is rectangular, and the rod body cross sectional shape is circle；
It in axial direction projects, rod body section is more than and includes club head section.
Preferably, the nail head is provided with screw thread.
Preferably, the nail tail portion trepanning inner wall and the distal outer surface of the supporting rod seamlessly transit；
It includes fin in one or more to follow closely tail portion trepanning inner wall outer end；
The interior fin extends along trepanning inner wall circumferential direction；Extension angle is less than 360 degree；
Supporting rod proximal end includes outer fin；
The outer fin is corresponded with the interior fin.
Compared with prior art, the utility model has following advantageous effect：
1, the structure being inserted using the trepanning of screw tail portion, matched supporting rod avoids spiral shell in the course of surgery
After being pinned to position, the larger supporting rod in cross section damages peripheral nerve tissue again insertable into human body；
2, adjusting screw and the relative position between bar can be strutted, and can be limited between the two by snap fastener
Axial displacement, enhance surgical procedure in fixed intensity；
3, can not take out strut bar in the case of, directly screw is taken out from operative site, reduce operation Chinese medicine
Treat the probability that equipment is used or taken out and damaged to perienchyma.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign, objects and advantages will become more apparent upon：
Fig. 1 is positioning device front view；
Fig. 2 is positioning device left view；
Fig. 3 is utility model works schematic diagram；
Fig. 4 is the fragmentary detail view A of Fig. 3；
Fig. 5 is the section B-B figure of Fig. 3 when twisting bar to be inserted into inside supporting rod；
Fig. 6 is the section B-B figure of Fig. 3 when twisting bar to be not inserted into inside supporting rod；
Fig. 7 is to strut pin structure figure；
Fig. 8 is to twist pin structure figure；
Fig. 9 is the fundamental diagram of the utility model in change case；
Figure 10 is the fundamental diagram that change case is further change in rear the utility model.
It is shown in figure：
1 nail head 21 of positioning device
101 nail rod portion 22 of clamping block
Elastic piece 102 follows closely tail portion 23
Supporting rod 11 twists bar 3
111 club head 31 of fixed supporting rod
112 bar transition part 32 of movable support rod
12 rod body 33 of distance rod
13 bar tail portion 34 of distance adjustor
Strut fin 50 in nail 2
201 outer fin 60 of annular groove
Bottom groove 202
Specific implementation mode
The utility model is described in detail with reference to specific embodiment.Following embodiment will be helpful to this field
Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, various modifications and improvements can be made.
These belong to the scope of protection of the utility model.
In embodiment, according to vertebra vertebra section dilator provided by the utility model, including positioning device 1, strutting nail 2, twisting
Bar 3, as shown in Figure 1.Positioning device 1 includes supporting rod 11, distance rod 12 and distance adjustor 13, and supporting rod 11 is again comprising fixation
Supporting rod 111 and movable support rod 112.Fixed supporting rod 111 is arranged in one end of distance rod 12, and movable support rod 112 is sleeved on
On distance rod 12, movable support rod 112, distance rod 12 can generate axially opposing sliding between the two.Movable support rod 112 is also
It is fixedly connected, and can be slided on distance rod 12 simultaneously with distance adjustor 13.12 upper surface of distance rod has been evenly arranged in an axial direction
Tooth form striped, distance adjustor 13 make its banking stop one end be inserted into tooth form striped groove, limit under the state of not stressing, by elastic component
Displacement between system and distance rod 12.Distance adjustor 12 further includes the idler wheel being meshed with tooth form striped, by the drive of idler wheel,
Spacing mechanism 12 is moved with movable support rod 112 towards the direction far from fixed supporting rod 11；Compression elastic piece makes banking stop lift
And tooth form striped groove is left, it just can freely adjust the position of movable support rod 112.
The tendency of supporting rod 11 along its length is consistent, and centre exist bending by supporting rod 11 be divided into epimere with
Hypomere：Epimere connects distance rod 12；Hypomere is cylinder, and there is through-hole in the axial direction.As described in Figure 6, setting in through-hole
Flexible 102,4 pieces of elastic pieces 102 surround a closed polygon radially, and closed polygonal internal is hollow
It constitutes and holds bar space, under reducing condition, 102 shape of elastic piece is arcuation, can hold bar similar to the parabola backwards to through-hole central axes
The geometric center in space is located on through-hole central axes.The both ends of elastic piece 102 be fixed on the inner wall of 11 through-hole of supporting rod or with
Other elastic pieces are fixedly connected.It is fixed with clamping block 101 on symmetrical two pieces of elastic pieces 102, elastic piece 102 is in reducing condition
When, clamping block 101 is in harvesting state, that is, is integrally located inside supporting rod 11.As shown in figure 5, being inserted into supporting rod 11 when twisting bar 3
Through-hole in, and behind the appearances bar space, hold bar spatial area and become larger, the generation crimp of elastic piece 102, elastic piece
The vertex of 102 parabolic shape is moved towards far from through-hole central axes direction, the clamping block 101 being attached on elastic piece 102
It moves radially outwards, trepanning is arranged in corresponding position on supporting rod 11, and clamping block 101 can be extruded supporting rod along trepanning
11, i.e. thorn does well.
In preference, the elastic piece 102 can also be other kinds of elastic component, such as spring or elastic rod,
And material can also be the nonmetallic materials of such as rubber one kind, but in view of twist bar 3 be inserted into when, need elastic component that can hold
By the moment of flexure of certain axial direction, metallic elastic piece is selected preferably.In addition, the appearance bar space boundary also may be used
To be discontinuous, for example, the both ends of 4 elastic pieces 102 are both connected on the inner wall of 11 through-hole of supporting rod, circumferentially uniformly divide
Cloth, and do not contact each other, clamping block 101 is consistent with the setting form in embodiment, can also complete harvesting state and pierce out shape
Switching between both states of state, the program enable stubborn bar 3 to be more easily inserted and removed from, and disadvantage, which is to process, relatively to be implemented
Example is complicated.For convenience of the installation of clamping block 101 and elastic piece 102, it is preferable that the two can be arranged in the distal end of supporting rod 11
Position, also can by supporting rod 11 is divided near its position be two sections, two sections between connected by modes such as screw threads.It is preferred that
The quantity on ground, elastic piece can be one or more, but quantity crosses multipotency and causes processing difficulties, quantity that can then cause to be oriented to very little
Function is deteriorated.
As shown in figure 8, in embodiment, twist bar 3 mainly by club head 31, bar transition part 32, rod body 33, bar tail portion 34 according to
It is secondary to connect and compose.Bar 3 is twisted to be inserted into the through-hole of supporting rod 11.33 section of rod body is circle, and can be changed by bullet
Property piece 102 formed appearance bar space；The section of club head 31 is rectangular, is free to pass through without causing in calm bar space
Elastic piece 102 deforms；Bar transition part 32 completes the rounding off of two sections shape；34 section of bar tail portion is hexagon, is conveniently made
Stubborn bar 3 is circumferentially turned with tool.Preferably, the section of club head 31 can also be non-circular other shapes, such as triangle,
It is quincunx or oval etc.；Bar tail portion 34 can also be to be provided with a narrow groove or other shapes in proximal end face, only need
Tool easy to use carries out torquing operations to it.
As shown in fig. 7, in embodiment, struts nail 2 and be mainly sequentially connected by nail head 21, nail rod portion 22 and nail tail portion 23
It constitutes.Tail portion 23 is axially disposed has blind hole, supporting rod 11 to be inserted among the blind hole for nail, and blind pore wall upper edge axis is equal
It is even to be provided with annular groove 201, when clamping block 101, which is in thorn, to do well, just it is inserted into the annular groove 201,
It completes to the opposite axial restraint for strutting nail 2 of supporting rod 11.In the bottom of the blind hole, be equipped with bottom groove 202, shape with
The shape for twisting the club head 31 of bar 3 is consistent and cannot generate between the two relative circumferential movement, when ensureing that bar 3 is twisted in rotation,
Strutting nail 2 can also rotate synchronously.Nail head 21 and nail rod portion 22 are provided with screw thread, conveniently strut being screwed into and back-outing for nail 2.
As shown in figure 9, in change case, the distal outer surface of nail the tail portion trepanning inner wall and the supporting rod 11 of nail 2 is strutted
It seamlessly transits, during use, supporting rod 11, which is inserted directly into, to be strutted in 2 tail portion trepannings of nail, and abandons stubborn rod structure.The knot
Structure greatly reduces the difficulty of processing of vertebra cone section dilator provided by the utility model, and can meet the fixed need of operation
It asks, avoids in the process again damaging vertebra perienchyma using supporting rod 11.As shown in Figure 10, further, change
2 nail tail portion trepanning inner wall outer end of nail is strutted in example is additionally provided with three interior fins 50；The interior fin 50 is circumferential along trepanning inner wall
Direction extends, and extension angle is 180 degree；Supporting rod proximal end includes outer fin 60；The outer fin 60 and the interior fin 50 1
One corresponds to.The setting of fin so that supporting rod 11 be adequately inserted strut nail 2 tail portion trepannings after, can be intermeshed between fin,
To play the role of axial restraint.Preferably, the quantity of interior fin 50 can also be one or more of, and extension angle also may be used
To be less than 360 degree of other values, such as 90 degree or 270 degree, in addition, quantity, the extension angle of outer fin 60 and interior fin 50
Page can be inconsistent, need to only ensure that the two can be engaged, achieve the purpose that axial restraint.Especially, outer fin 60 with it is interior
Between fin 50, strut nail 2 it is non-coaxial with supporting rod 11 when or only strut nail 2 it is non-coaxial with supporting rod 11 when can be into
Row engagement, strut nail 2 it is coaxial with supporting rod 11 when can be mutually disengaged.
Operation principle：
In the present embodiment, the vertebra cone section dilator that utility model provides includes positioning device 1, struts nail 2, twists bar 3, fixed
Position device 1 includes supporting rod 11, distance rod 12 and distance adjustor 13, and supporting rod 11 is again comprising fixed supporting rod 111 and activity
Supporting rod 112.Fixed supporting rod 111 is fixed on one end of distance rod 12, and distance adjustor 13 can control 112 edge of movable support rod
Distance rod 12 is axial to be moved, and the distance between two supporting rods 11 are adjusted.
Two strut nail and 2 match with two supporting rods 11, strut and are provided with screw thread on the nail head 21 for follow closely 2, when operation,
Nail will first be strutted 2 to be fixed in the vertebra on pathological interspinal disk both sides, then supporting rod 11 is inserted into to strut nail 2 aft mounted blind
The distance between Kong Zhong, adjust and fix two supporting rods 11.It is uniformly provided with annular groove in an axial direction on the hole wall of the blind hole
201, the hypomere of supporting rod 11 is provided with through-hole in an axial direction, and through-hole is internally provided with clamping block 101 and elastic piece 102, elastic piece 102
Under reducing condition, clamping block 101 is located at the inside of supporting rod 11.When the rod body 33 for twisting bar 3 passes through the appearance that elastic piece 102 is formed
Behind bar space, elastic piece 102 deforms, and will be connected to clamping block 101 on elastic piece 102 and squeeze out supporting rod 11, clamping block
101 match with annular groove 201, complete to the opposite axial restraint for strutting nail 2 of supporting rod 11.And bar 3 is twisted in elastic piece 102
Clamping under, can also keep the axial restraint of opposite supporting rod 11 in the course of surgery.
After operation, stubborn bar 3 can be extend into the bottom for strutting 2 blind holes of nail, the bottom of the blind hole is provided with and bar
The matched bottom groove 202 of 31 shape of head rotates stubborn bar 3 and inserts it into bottom groove 202, no longer generates between the two
Relative circumferential movement.The bar tail portion 34 for twisting bar 3 is provided with the structure conveniently screwed, and the tool of can be used turns it, struts at this time
Nail 2 can also rotate synchronously, and be taken out from vertebra to strut nail 2.
Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims,
This has no effect on the substantive content of the utility model.
Claims (2)
1. a kind of vertebra vertebra section dilator, which is characterized in that comprising strutting nail and positioning device；
The positioning device includes multiple supporting rods；
The distance between described supporting rod can be adjusted；
Multiple nails that strut are corresponded with multiple supporting rods；
The nail that struts can be with the supporting rod nested encryptions；
The nail that struts includes nail head, nail rod portion and nail tail portion；
The nail head, nail rod portion and nail tail portion are sequentially connected；
Tail portion is axially disposed trepanning for nail；
The distal end of the supporting rod can be nested in the trepanning；
The positioning device also includes distance rod and distance adjustor；
The supporting rod includes fixed supporting rod and movable support rod；
The fixed supporting rod is fixed on one end of the distance rod；
The movable support rod is connect with the distance adjustor；
Distance adjustor can adjust position of the movable support rod in distance rod axial direction.
2. vertebra vertebra section dilator according to claim 1, which is characterized in that the nail tail portion trepanning inner wall and the branch
The distal outer surface of strut seamlessly transits；
It includes fin in one or more to follow closely tail portion trepanning inner wall outer end；
The interior fin extends along trepanning inner wall circumferential direction；Extension angle is less than 360 degree；
Supporting rod proximal end includes outer fin；
The outer fin is corresponded with the interior fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720465847.6U CN207970103U (en) | 2017-04-28 | 2017-04-28 | Vertebra vertebra section dilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720465847.6U CN207970103U (en) | 2017-04-28 | 2017-04-28 | Vertebra vertebra section dilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207970103U true CN207970103U (en) | 2018-10-16 |
Family
ID=63770199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720465847.6U Expired - Fee Related CN207970103U (en) | 2017-04-28 | 2017-04-28 | Vertebra vertebra section dilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207970103U (en) |
-
2017
- 2017-04-28 CN CN201720465847.6U patent/CN207970103U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181016 Termination date: 20200428 |