CN208447751U - Vertebral column minimally invasive pitman - Google Patents
Vertebral column minimally invasive pitman Download PDFInfo
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- CN208447751U CN208447751U CN201720992519.1U CN201720992519U CN208447751U CN 208447751 U CN208447751 U CN 208447751U CN 201720992519 U CN201720992519 U CN 201720992519U CN 208447751 U CN208447751 U CN 208447751U
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- taper
- pitman
- cut portion
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- minimally invasive
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Abstract
The utility model provides a kind of vertebral column minimally invasive pitman, including pitman ontology and set on the taper-cut portion of described ontology one end, the taper-cut portion and the ontology are coaxially disposed, taper-cut portion side wall is uniformly provided with multiple blades along axial direction, the blade is arranged to big extreme direction in divergent shape along taper-cut portion small end, taper-cut portion top is smooth arc-shaped surface, the ontology includes at least three sections of barred bodies, flexible connector is equipped between adjacent two barred body, the barred body is the arcuate structure for meeting Human Physiology dissection radian, the connector is U-shaped structure, the connector is opposite with the barred body bending direction.A kind of vertebral column minimally invasive pitman provided by the utility model results only in micro-incisions when wearing stick using connection club head setting taper-cut portion, without cutting the notch of 7CM a to 20CM at vertebra, is conducive to post-operative recovery.
Description
Technical field
The utility model relates to the field of medical instrument technology, more particularly to a kind of vertebral column minimally invasive pitman.
Background technique
In spinal surgery, pedicle screw fixation system is used usually as internal fixation system, and pedicle screw fixation system is main
It is made of bone screws, plug screw, pitman, application method is: first by the designated position of bone screws implantation each segment of backbone, then
Pitman is placed in the groove of each murices nail seat by instrument, and is threadedly engaged using the nail seat of plug screw and bone screws, is led to
The screw-down torque for crossing screw thread is pressed in plug screw securely in the nail seat of bone screws pitman, keeps pitman and each bone screws complete
It connects firmly, so completes the implantation of pedicle screw fixation system.Fixed form in this way can remain opposite steady at spine dislocation
It is qualitative, make patient that there is basic sitting walking function.
In traditional pedicle screw fixation system, since pitman uses rigid material, this system is easy to cause ridge
" stress shielding " that power is transmitted between each segment of column." stress shielding " be when backbone bear along backbone direction unidirectional force or
When the torque that the movements such as person's backbone grantee's trunk bending forwards generate, because the rigidity between bone screws and pitman connects firmly, it is being implanted into
The spinal segments of pedicle screw fixation system, the external force or torque are mostly to be born by pedicle screw fixation system rather than by ridge
Column is born, and this phenomenon is " stress shielding ".
When " stress shielding " situation generates, stress concentrates on pitman and non-spinal, and it is disconnected that this not only adds pitmans
A possibility that stick, also may cause the generation of the human bodies unfavorable condition such as backbone Adjacent segment degeneration.Backbone bone and its attached people
Body tissue, as a kind of biomaterial, the phenomenon that there is " being moved back with into useless ", if certain segment backbone and its attached tissue are long
Phase is not subject to mechanical loading, and the risk for generating tissue degeneration will will increase.
The operation for being implanted into bone screws and pitman in vertebra at present generally uses open surgery, by entire patient fiber crops
It is liquor-saturated, the notch of 7CM a to 20CM is cut at vertebra, and bone screws are implanted into bone intraspinal, then that pitman is connected across to implantation
On screw, the bone screws and pitman of implantation are fixed together by the way that plug screw is fixed, are finally sewed up a wound again.The technology wound
Greatly, bleeding is more, after bone screws are implanted into backbone, it is necessary to which the musculature cut between bone screws carries out open operation, ability
Pitman is smoothly allowed to pass through bone screws, so wound is big during operation, bleeding is more, and operation risk is big, and patient is extensive after surgery
Multiple generally require slowly three months can just leave the bed, and be easy to leave sequelae.
Utility model content
The technical problem to be solved by the utility model is in order to overcome in the prior art pitman be easy to produce " stress
Block " and the big deficiency of surgical wound in pitman implantation, the utility model provides a kind of vertebral column minimally invasive pitman.
The utility model solves its technical problem technical solution to be taken: a kind of vertebral column minimally invasive pitman, including
Pitman ontology and set on the taper-cut portion of described ontology one end, the taper-cut portion and the ontology are coaxially disposed,
Taper-cut portion side wall is uniformly provided with multiple blades along axial direction, and the blade is along taper-cut portion small end to big end side
It is arranged in divergent shape, taper-cut portion top is smooth arc-shaped surface.
Taper-cut portion is to preferably wear stick, and blade structure makes to wear stick and is easier for cutting musculature, taper
Cutting part top hurts artery or nerve fiber when wearing stick in order to prevent using smooth arc-shaped surface, and ontology passes through bone screws and plug screw
Pitman is fixed on backbone by cooperation, is made restoring backbone of dislocating by the supporting role of pitman, is played recovery effects.
Further, the ontology includes at least three sections of barred bodies, is equipped with flexible connection between adjacent two barred body
Part.One section of barred body and a section backbone cooperate, and barred body are fixed on backbone by the cooperation of bone screws and plug screw, the barred body at both ends
It is fixedly connected with natural spine, intermediate barred body is fixedly connected with the backbone of lesion, makes to dislocate by the supporting role of pitman
Restoring backbone, plays recovery effects, and connector reduces stress shielding to generate the effect of the same elastic micro-motion of spring-like
Effect, delay the regression of adjacent phases backbone.
Further, the barred body is arcuate structure, and the connector is U-shaped structure, and the connector and the barred body are curved
It is bent contrary.Barred body connect barred body with backbone and is more agreed with using the arcuate structure for meeting Human Physiology dissection radian, even
The elasticity of connector can be improved using U-shaped for fitting, and U-shaped structure opening direction is opposite with the caudal directions of bone screws.
Further, the ontology is equipped with interconnecting piece far from the one end in the taper-cut portion, and the interconnecting piece is used for and wears
Bar device plug connection.
The beneficial effects of the utility model are: a kind of vertebral column minimally invasive pitman provided by the utility model, using pitman
Head setting taper-cut portion results only in micro-incisions when wearing stick, without cutting the notch of 7CM a to 20CM at vertebra,
Conducive to post-operative recovery, the effect of the same elastic micro-motion of spring-like is generated using connector, reduces the effect of stress shielding
It answers, delays the regression of adjacent phases backbone.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the structural schematic diagram of the best embodiment of the utility model；
Fig. 2 is the enlarged diagram of A in Fig. 1；
Fig. 3 is spine nail stick assembling schematic diagram.
In figure: 1, barred body, 2, connector, 3, taper-cut portion, 3-1, blade, 4, interconnecting piece, 5, bone screws, 6, plug screw.
Specific embodiment
The utility model is described in detail presently in connection with attached drawing.This figure is simplified schematic diagram, only in a schematic way
Illustrate the basic structure of the utility model, therefore it only shows composition related with the utility model.
As shown in Figs. 1-2, a kind of vertebral column minimally invasive pitman of the utility model, including three sections of arc barred bodies 1, adjacent two institute
It states and is equipped with flexible U-shaped connector 2 between barred body 1,1 axis of barred body is set on same circumference, the U-shaped connector
With 1 bending direction of barred body on the contrary, the barred body 1 is made of titanium alloy, the U-shaped connector 2 uses 2 bending directions
Polyurethane material injection molding is made.
The barred body 1 is equipped with taper-cut portion 3,3 side wall of taper-cut portion far from one end of the U-shaped connector 2
Multiple blade 3-1 are uniformly provided with along axial direction, the blade 3-1 is along 3 small end of taper-cut portion to big extreme direction in divergent shape
Setting, 3 top of taper-cut portion are smooth arc-shaped surface, and the taper-cut portion 3 is integrally machined with the barred body 1 and is made, institute
Blade 3-1 is stated to cut using cutter.
The barred body 1 is equipped with interconnecting piece 4 far from the other end of the U-shaped connector 2, and the interconnecting piece 4 is used for and wears stick
Device plug connection, it is the polygonized structures such as triangle, square or regular hexagon that the interconnecting piece 4, which is section,.
Installation process:
As shown in figure 3, first three bone screws 5 are implanted into respectively on dislocation backbone and its adjacent normal backbone of two sections,
Then pitman is placed in the groove of each 5 nail seat of bone screws by wearing bar device, and uses the nail seat of plug screw 6 and bone screws 5
It is threadedly engaged, is pressed in plug screw 6 securely by pitman barred body 1 in the nail seat of bone screws 5 by the screw-down torque of screw thread, until
Dislocation backbone is pulled to normal position.
It is enlightenment, through the above description, relevant work with the above-mentioned desirable embodiment according to the utility model
Personnel can carry out various changes and amendments in without departing from the scope of the utility model completely.This item utility model
Technical scope is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (4)
1. a kind of vertebral column minimally invasive pitman, it is characterised in that: the taper including pitman ontology and set on described ontology one end
Cutting part (3), the taper-cut portion (3) and the ontology are coaxially disposed, and taper-cut portion (3) side wall is along axial uniform
Equipped with multiple blades (3-1), the blade (3-1) is arranged to big extreme direction in divergent shape along taper-cut portion (3) small end,
Taper-cut portion (3) top is smooth arc-shaped surface.
2. vertebral column minimally invasive pitman as described in claim 1, it is characterised in that: the ontology includes at least three sections of barred bodies (1),
Flexible connector (2) are equipped between adjacent two barred body (1).
3. vertebral column minimally invasive pitman as claimed in claim 2, it is characterised in that: the barred body (1) is arcuate structure, the company
Fitting (2) is U-shaped structure, and the connector (2) is opposite with the barred body (1) bending direction.
4. vertebral column minimally invasive pitman as described in claim 1, it is characterised in that: the ontology is far from the taper-cut portion
(3) one end is equipped with interconnecting piece (4), and the interconnecting piece (4) is used for and wears bar device plug connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720992519.1U CN208447751U (en) | 2017-08-09 | 2017-08-09 | Vertebral column minimally invasive pitman |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720992519.1U CN208447751U (en) | 2017-08-09 | 2017-08-09 | Vertebral column minimally invasive pitman |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208447751U true CN208447751U (en) | 2019-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720992519.1U Active CN208447751U (en) | 2017-08-09 | 2017-08-09 | Vertebral column minimally invasive pitman |
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| CN (1) | CN208447751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107320166A (en) * | 2017-08-09 | 2017-11-07 | 常州奥斯迈医疗器械有限公司 | Vertebral column minimally invasive pitman |
-
2017
- 2017-08-09 CN CN201720992519.1U patent/CN208447751U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107320166A (en) * | 2017-08-09 | 2017-11-07 | 常州奥斯迈医疗器械有限公司 | Vertebral column minimally invasive pitman |
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