CN208892747U - A kind of lumbar vertebral posterior intervertenral space dilator - Google Patents
A kind of lumbar vertebral posterior intervertenral space dilator Download PDFInfo
- Publication number
- CN208892747U CN208892747U CN201820417620.9U CN201820417620U CN208892747U CN 208892747 U CN208892747 U CN 208892747U CN 201820417620 U CN201820417620 U CN 201820417620U CN 208892747 U CN208892747 U CN 208892747U
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- CN
- China
- Prior art keywords
- lumbar vertebral
- pedicle
- dilator
- pitman
- lumbar
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- Expired - Fee Related
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- 230000002457 bidirectional effect Effects 0.000 claims description 17
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 210000000988 bone and bone Anatomy 0.000 claims description 3
- 238000001356 surgical procedure Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 210000005036 nerve Anatomy 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 208000015122 neurodegenerative disease Diseases 0.000 description 2
- 210000000278 spinal cord Anatomy 0.000 description 2
- 206010061246 Intervertebral disc degeneration Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 208000007103 Spondylolisthesis Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000018180 degenerative disc disease Diseases 0.000 description 1
- 230000003412 degenerative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000021600 intervertebral disc degenerative disease Diseases 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 206010039722 scoliosis Diseases 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
Abstract
The utility model relates to a kind of lumbar vertebral posterior intervertenral space dilators, including dilator and pedicle of lumbar vertebral arch screw, dilator includes being symmetrical arranged and be mutually rotatably connected two strut arm, each strutting arm includes the interconnecting piece, middle part and handle portion being sequentially connected, interconnecting piece is hollow sleeve structure, and interconnecting piece is equipped with the through hole being connected with hollow sleeve；It further include the pitman that can connect dilator and pedicle of lumbar vertebral arch screw, the nut of pedicle of lumbar vertebral arch screw is equipped with tapped groove, pitman is the column structure that one end has outer-hexagonal flange with external screw thread, the other end, pitman can be extend into hollow sleeve from through hole, and pitman is engaged with pedicle of lumbar vertebral arch screw energy mutually screw thread.The utility model can pressurize struts pitman drive pedicle screw to two sides movement step by step, to strut intervertenral space, provides effective and safety and stability space for lumbar vertebral posterior intervertenral space surgical procedure, improves the efficiency and quality of lumbar surgery.
Description
Technical field:
The utility model relates to medical auxiliary equipment field, more particularly to a kind of lumbar vertebral posterior intervertenral space is strutted
Device.
Background technique:
Lumbar degenerative disease refer to because Lumbar Intervertebral Disc Degeneration and its it is secondary sexually revise, stimulate or oppress adjacent spinal cord, nerve
The tissue such as blood vessel, and cause corresponding sings and symptoms person.As people's lifestyle changes, the morbidity of lumbar degenerative disease
Rate obviously increases, and the diseases such as Severe herniated lumbar discs, spinal canal stenosis, lumber spondylolisthesis, Surgical treatment of degenerative lumbar scoliosis are often accompanied by one
Side or bilateral intervertenral space are extremely narrow, over the course for the treatment of, need to expand narrow canalis spinalis, the excision of pathological interspinal disk, intervertenral space
Intervertebral foramen support is big, to release the card pressure of dural sac and nerve root, cures disease.Currently, lacking intervertebral pulling in medical industry
Device, thus cause narrow intervertenral space strut operation it is extremely difficult.Thus, it is necessary to one kind, which is provided, for people is convenient to reality
The existing narrow distracted intervertebral opening device external member of intervertenral space.
Traditional intervertebral opening device generally comprises the arm that struts for strutting intervertenral space, and dilator front end is inserted into adjacent by when operation
In pedicle screw tail cap, dilator top of then firmly holding with a firm grip struts adjacent vertebral, but one side vertebra in a certain range
Pedicle screw tail cap be it is universal, dilator be easy slips away, another aspect dilator arm is straight, occupies lumbar vertebrae
Surgical procedure space above the way of escape, stops and affects surgical procedure.
Utility model content:
The purpose of this utility model is in view of the deficiencies of the prior art, to provide a kind of lumbar vertebral posterior intervertenral space and strut
Device is placed in pitman in the interspace of lumbar vertebrae adjacent vertebrae that need to be handled in advance and is connected on the nut of pedicle of lumbar vertebral arch screw, can be with
Intervertenral space is strutted by dilator as fulcrum, the efficiency and quality of lumbar surgery can be improved；It is convenient to realize narrow
Intervertenral space struts.
The technology solution of the utility model is as follows:
A kind of lumbar vertebral posterior intervertenral space dilator, including dilator and two lumbar vertebrae vertebral arch being fixed on adjacent lumbar vertebrae bone
Root screw, the dilator include being symmetrical arranged and be mutually rotatably connected two strut arm, and each strutting arm includes successively
Connected interconnecting piece, middle part and handle portion, interconnecting piece is hollow sleeve structure, and interconnecting piece is equipped with and is connected with hollow sleeve
Logical through hole；It further include the pitman that can connect dilator and pedicle of lumbar vertebral arch screw, the pedicle of lumbar vertebral arch screw
Nut is equipped with tapped groove, and the pitman is the column that one end has outer-hexagonal flange with external screw thread, the other end
Body structure, pitman can be extend into hollow sleeve from through hole, and the front end external screw thread of pitman can be worn from interconnecting piece
It engages out and with the mutual screw thread of tapped groove on the nut of pedicle of lumbar vertebral arch screw.
Preferably, the middle part for each strutting arm is hingedly connected to one another.
Preferably, the handle portion is equipped with anti-skid bulge.
Preferably, described strut between the interconnecting piece of arm and handle portion in 95 °.
Preferably, handle portion described in two is respectively first-hand shank and second handle portion, the first-hand shank
Bidirectional helical bar is connected with by sleeve connection block respectively between second handle portion, and the end of bidirectional helical bar passes through ratchet
It is installed with adjusting knob, rotation of adjustment knob can make two sleeve connection blocks along bidirectional helical bar synchronous relative motion.
Preferably, the top of the pitman is completely disposed in hollow sleeve.
The utility model has the beneficial effects that:
The utility model solves the problems, such as to strut intervertenral space in lumbar surgery, and different widths are not inside and outside distracted gap
Greatly, be not in the beloid situation of intervertenral space, and further increase the efficiency and quality of lumbar surgery, when shortening operation
Between, operation safety and success rate are improved, patient's pain is mitigated.
Handle portion described in the utility model two is respectively first-hand shank and second handle portion, the first-hand shank
Bidirectional helical bar is connected with by sleeve connection block respectively between second handle portion, and the end of bidirectional helical bar passes through ratchet
It is installed with adjusting knob, rotation of adjustment knob can make two sleeve connection blocks along bidirectional helical bar synchronous relative motion.This
After sample intervertenral space struts, artificial applied force always is not needed, it is constant also to achieve the effect that intervertenral space is stablized.
The utility model lumbar vertebral posterior intervertenral space dilator is connected in pedicle of lumbar vertebral arch by the external screw thread of connection nose
Internal screw thread on the nut of screw, screw-type connection good stability avoid connecing for conventional dilator and pedicle screw tail cap
The easy slipping property of touch connection.Intervertenral space effectively is strutted, provides good broad operating space for intervertenral space surgical procedure；Together
When, it is good strut stability and avoid conventional dilator often slip bring to the interference damage of spinal cord, nerve root, improve
The safety of operation.
The utility model rotation of adjustment knob can make two sleeve connection blocks along bidirectional helical bar synchronous relative motion.
To making first-hand shank and second handle portion synchronous relative motion, can gradually strut intervertenral space, relaxation freely, for vertebra of performing the operation
Height required for gap provides, while intervertenral space can effectively be maintained to strut height, avoid the frequent slip band of conventional dilator
The disc height variation come.It is in 95 ° of angles between the interconnecting piece and handle portion of lumbar vertebral posterior intervertenral space dilator, avoids
The blocking of conventional straight dilator operating space above lumbar vertebral posterior influences.
Detailed description of the invention:
The utility model is described further with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the dilator of the utility model；
Fig. 3 is the structural schematic diagram of the pedicle of lumbar vertebral arch screw of the utility model；
Fig. 4 is the structural schematic diagram of the pitman of the utility model；
In Fig. 1~4: 1-dilator；2-pedicle of lumbar vertebral arch screws；The ailhead of 201-pedicle of lumbar vertebral arch screws；202—
The nut of pedicle of lumbar vertebral arch screw；3-strut arm；301-interconnecting pieces；302-middle parts；303-handle portions；304-run through
Hole；4-pitmans；401-external screw threads；402-outer-hexagonal flanges；5-anti-skid bulges；6-sleeve connection blocks；7-two-way spiral shells
Rasp bar；8-adjusting knobs；9-lumbar vertebras.
Specific embodiment:
Embodiment is shown in attached drawing 1~4, including dilator 1 and two pedicle of lumbar vertebral arch screws being fixed on adjacent lumbar vertebrae bone
2, the dilator includes being symmetrical arranged and be mutually rotatably connected two strut arm 3, and each strutting arm includes being sequentially connected
Interconnecting piece 301, middle part 302 and handle portion 303, interconnecting piece is hollow sleeve structure, and interconnecting piece is equipped with and hollow sleeve
The through hole 304 that cylinder is connected；It further include the pitman 4 that can connect dilator and pedicle of lumbar vertebral arch screw, the lumbar vertebrae vertebra
The nut of pedicle screw is equipped with tapped groove, and the ailhead 201 of pedicle of lumbar vertebral arch screw is fixed on lumbar vertebra, lumbar vertebrae
The nut of pedicle screw is located at the rear outside of lumbar vertebra, and nut supports on lumbar vertebra.
The pitman is the column structure that one end has outer-hexagonal flange 402 with external screw thread 401, the other end, connection
The centre of stick is smooth cylindrical structure, and pitman can be extend into hollow sleeve from through hole, and outside the front end of pitman
Screw thread can be pierced by from interconnecting piece and engage with the mutual screw thread of tapped groove on the nut of pedicle of lumbar vertebral arch screw.
Mating allen driver is in contact with outer-hexagonal flange, the front end male thread portion of pitman can be screwed in pedicle of lumbar vertebral arch
To make pitman be fixed together with pedicle of lumbar vertebral arch screw in the nut of screw.
The middle part for each strutting arm is hingedly connected to one another by hinged shaft, and each strutting arm can revolve around hinged shaft
Turn.
The handle portion is equipped with anti-skid bulge 5, holds convenient for medical staff, prevents from slipping.
It is described to strut between the interconnecting piece of arm and handle portion in 95 °.Conventional straight dilator is avoided on lumbar vertebral posterior
The blocking of square operating space influences, and gap distracted in this way is blocked without instrument, convenient for the subsequent progress of operation.
Handle portion described in two is respectively first-hand shank and second handle portion, the first-hand shank and second handle
Bidirectional helical bar 7 is connected with by sleeve connection block 6 respectively between portion, one end of bidirectional helical bar is equipped with forward screw thread, two-way
The other end of threaded rod is equipped with reverse thread, and two sleeve connection blocks are respectively cooperating in forward screw thread and reverse thread, and
Two sleeve connection blocks are connected in first-hand shank and second handle portion, i.e., divide in first-hand shank and second handle portion
Not She You accommodating hole, sleeve connection block is located in accommodating hole；The end of the bidirectional helical bar is installed with adjusting rotation by ratchet
Button 8, rotation of adjustment knob can make two sleeve connection blocks along bidirectional helical bar synchronous relative motion.The sleeve connection block
It is processed by stainless steel, sleeve connection block is connected through a screw thread with bidirectional helical bar, and sleeve connection block is with bidirectional helical bar
The screw thread of precision-fit, accuracy of thread is identical, and screw pitch is all 0.5mm, and requirement on machining accuracy is identical as micrometer screw rod precision, protects
Card sleeve connection block is synchronous when threadingly bar moves toward one another.
The top of the pitman is completely disposed in hollow sleeve.
The utility model application method:
1. the flighting front end of the pitman of lumbar vertebral posterior intervertenral space dilator is fixed in the nut of pedicle of lumbar vertebral arch screw.
2. the hollow sleeve of the interconnecting piece for strutting arm of lumbar vertebral posterior intervertenral space dilator is placed on pitman.
3. rotation of adjustment knob can make two sleeve connection blocks along bidirectional helical bar synchronous relative motion, to pressurize
The handle portion of lumbar vertebral posterior intervertenral space dilator, struts intervertenral space step by step.
4. strutting distance according to what screw pitch determined intervertenral space, stop rotating adjusting knob after distance required for reaching, into
Row operation.
5. extracting dilator after operation is completed in intervertenral space operation, it is detached from dilator and pitman.
6. mating allen driver rotates removal pitman counterclockwise, the nut of pedicle of lumbar vertebral arch screw is vacated, and is completed
Subsequent procedures.
Above-described embodiment is the specific descriptions carried out to the utility model, is only carried out furtherly to the utility model
It is bright, it should not be understood as the restriction to scope of protection of the utility model, those skilled in the art is according in above-mentioned utility model
Appearance is made some nonessential modifications and adaptations and is each fallen within the protection scope of the utility model.
Claims (6)
1. a kind of lumbar vertebral posterior intervertenral space dilator, including dilator and two pedicle of lumbar vertebral arch being fixed on adjacent lumbar vertebrae bone
Screw, it is characterised in that: the dilator includes being symmetrical arranged and be mutually rotatably connected two strut arm, each struts arm
Including the interconnecting piece, middle part and handle portion being sequentially connected, interconnecting piece is hollow sleeve structure, and interconnecting piece be equipped with it is hollow
The through hole that sleeve is connected；
Further include the pitman that can connect dilator and pedicle of lumbar vertebral arch screw, is set on the nut of the pedicle of lumbar vertebral arch screw
There is tapped groove, the pitman is the column structure that one end has outer-hexagonal flange with external screw thread, the other end, even
Taking over the baton can extend into hollow sleeve from through hole, and the front end external screw thread of pitman can be pierced by from interconnecting piece and and waist
The mutual screw thread engagement of tapped groove on the nut of vertebra pedicle screw.
2. a kind of lumbar vertebral posterior intervertenral space dilator according to claim 1, it is characterised in that: described each to strut arm
Middle part is hingedly connected to one another.
3. a kind of lumbar vertebral posterior intervertenral space dilator according to claim 1, it is characterised in that: the handle portion is equipped with
Anti-skid bulge.
4. a kind of lumbar vertebral posterior intervertenral space dilator according to claim 1, it is characterised in that: the connection for strutting arm
It is in 95 ° between portion and handle portion.
5. a kind of lumbar vertebral posterior intervertenral space dilator according to claim 1, it is characterised in that: handle portion described in two
Respectively first-hand shank and second handle portion pass through sleeve connection block respectively between the first-hand shank and second handle portion
It is connected with bidirectional helical bar, and the end of bidirectional helical bar is installed with adjusting knob by ratchet, rotation of adjustment knob can make
Two sleeve connection blocks are along bidirectional helical bar synchronous relative motion.
6. a kind of lumbar vertebral posterior intervertenral space dilator according to claim 1, it is characterised in that: the top of the pitman
It is completely disposed in hollow sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820417620.9U CN208892747U (en) | 2018-03-27 | 2018-03-27 | A kind of lumbar vertebral posterior intervertenral space dilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820417620.9U CN208892747U (en) | 2018-03-27 | 2018-03-27 | A kind of lumbar vertebral posterior intervertenral space dilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208892747U true CN208892747U (en) | 2019-05-24 |
Family
ID=66565311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820417620.9U Expired - Fee Related CN208892747U (en) | 2018-03-27 | 2018-03-27 | A kind of lumbar vertebral posterior intervertenral space dilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208892747U (en) |
-
2018
- 2018-03-27 CN CN201820417620.9U patent/CN208892747U/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 |
Granted publication date: 20190524 |