Dentoid process of axis's sighting device with twin nuclei
Technical field
The present invention relates to the technical fields of medical instrument, are particularly used for the skill of fracture of odontoid process of vertebra dentata therapeutic device
Art field.
Background technology
Fracture of odontoid process of vertebra dentata is the common fracture of cervical vertebra, accounts for the 10%~14% of fracture of cervical spine.Untreated or treatment are not
The odontoid fracture disunion rate caused by is 42-72%, and it is fixed to exist simultaneously potential atlanto-axial instability, may cause brain stem,
The acute or chronic damage of spinal cord or nerve root causes serious quadriplegia, respiratory dysfunction, or even dead.Therefore to pivot
The patient of vertebra odontoid fracture answers active treatment.From 1981, report used the direct treatment of internal fixation of odontoid fracture of screw for the first time
Since, it has proven convenient that compared with traditional therapy, this technology can not only rebuild the stability of articulatio atlantoepistrophica for clinical practice,
The activity of articulatio atlantoepistrophica can also be retained to the maximum extent, operation wound is small, and union rate is high, and is obviously improved minimal invasive treatment
Quality, it is believed that the technology is the first choice of odontoid fracture operative treatment.Although anterior screw treatment of internal fixation of odontoid fracture
Curative effect is clinically affirmed, but is oriented to Kirschner wire due to mainly operating by rule of thumb in the past and is needed to adjust repeatedly, and performed the operation
Randomness is big, in some instances it may even be possible to generate serious complication, including screw extraction, displacement fracture, nonunion or screw tapping
Cdontoid process and injure spinal cord etc..Chinese patent 2012102768399 discloses one kind《Dentoid process of axis's screw sighting device》, adopt
Two shrinking connecting-rods on hollow guiding pipe are mounted on to change the direction of hollow guiding pipe, two shrinking connecting-rods with nut adjustment
It is connected on vernier control plate, vernier control plate is connect by ball-joint with supporting rod.This dentoid process of axis's screw sighting device
It can be used for guiding Kirschner wire in fracture of odontoid process of vertebra dentata treatment to be accurately positioned, to improve surgical quality, reduce surgical error,
Reduce the pain of patient.But it in the course of surgery, since the position for needing to adjust is numerous, and adjusts each point of adjustment and mutually closes
Connection, generally requires to adjust repeatedly and can be only achieved requirement, influences operation progress.In addition, the length of the shrinking connecting-rod of nut adjustment is difficult
Precisely to measure, the position that shrinking connecting-rod is connected on vernier control plate is not known yet, this dentoid process of axis's screw sighting device
Coordinate data record position cannot be used, the positioning in can not performing the operation before repetition.
Invention content
The object of the present invention is to provide a kind of simple in structure, easy to use, governing speeds soon, can use coordinate representation position
Dentoid process of axis's sighting device with twin nuclei, guiding Kirschner wire is accurately positioned in being treated for fracture of odontoid process of vertebra dentata, from
And surgical quality is improved, surgical error is reduced, the pain of patient is reduced.
The present invention is for technical scheme applied to solve the technical problem:
Dentoid process of axis's sighting device of the present invention with twin nuclei includes hollow guiding pipe and is connected to sky
Sighting device on heart guide pipe, the sighting device include the inner sleeve and outer sleeve being arranged concentrically, the inner sleeve it is outer
Diameter is less than the internal diameter of outer sleeve, and the outer diameter of the hollow guiding pipe is less than the internal diameter of inner sleeve, the outer wall of hollow guiding pipe with it is interior
It is symmetrically arranged with left half axle and right axle shaft between the inner ring surface of lantern ring, the left half axle and right axle shaft coaxial arrangement and left half axle
The center of circle for passing through inner sleeve with the axis of right axle shaft;It is provided between the outer ring surface of the inner sleeve and the inner ring surface of outer sleeve
The circle that semiaxis and lower semiaxis, the upper semiaxis and the coaxial arrangement of lower semiaxis and the axis of upper semiaxis and lower semiaxis pass through inner sleeve
The heart;The axis of upper semiaxis and lower semiaxis is vertical with the axis of left half axle and right axle shaft;The upper semiaxis, lower semiaxis, left half axle and
Right axle shaft by can the inner sleeve and outer tube of relative rotation and coaxial arrangement be set with;One end of the outer tube is by can
The snap ring connection inner sleeve rotated freely, the other end of outer tube are fixedly connected on hollow guiding pipe or outer sleeve, housing
The inner cavity of pipe is the small taper blind hole of outer imperial palace, and the upper end of the blind hole is with the inside and outside stomata of connection;The inner sleeve is logical
Cross high-pressure air pipe connection air pump annular hollow pipe, one end of the inner sleeve be fixedly connected on inner sleeve and with inner sleeve
Tube chamber is connected to, and piston is equipped in the inner cavity of inner sleeve, and the inner end of the piston is axially displaceably mounted on the interior of inner sleeve
In chamber, the outer end of piston is in the inner cavity of outer tube and matching cone;On outer sleeve be arranged connecting plate and
Connecting seat.
The scale for indicating relative position is provided on the outer tube wall of the inner sleeve and outer tube joining place;The inner sleeve
Inner cavity in carry two boss disposed in parallel, the inner end of the piston is the cylinder between two boss.
After adopting the above technical scheme, the sighting device adjusts the direction of guide pipe, structure letter by dicyclic sighting device
Single, easy to use, governing speed is fast and available coordinate representation position, the convenient details for quantitatively recording surgical procedure utilize coordinate
The repeatable positioning reproduced in operation;Positioning Kirschner wire is set to be predominantly located in guider using hollow guide device, convenient for control
Direction avoids it from being bent and cause the suitable illusion of inserting needle;Use pressure control piston fixation hollow guider, location action
Soon, fixed reliable, position is fixed after being accurately positioned and positioning, and reduces inserting needle repeatedly, improves the accuracy of screw entrance;No
It needs to be implanted into fixing glue on Cervical vertebra and fixed connecting rod is firmly secured to operating bed, it is fixed reliable.
Description of the drawings
Fig. 1 is the positive structure schematic of one embodiment of the invention.
Fig. 2 is the schematic cross-sectional view of upper semiaxis.
Specific implementation mode
As shown in Figure 1, dentoid process of axis's sighting device of the present invention with twin nuclei include hollow guiding pipe 1 and
The sighting device being connected on hollow guiding pipe 1, the sighting device include the inner sleeve 2 being arranged concentrically and outer sleeve 3, described
The outer diameter of inner sleeve 2 is less than the internal diameter of outer sleeve 3, and the outer diameter of the hollow guiding pipe 1 is less than the internal diameter of inner sleeve 2, hollow to lead
It is symmetrically arranged with left half axle 5 and right axle shaft, the left half axle 5 and right axle shaft between the outer wall and the inner ring surface of inner sleeve 2 of pipe 1
The center of circle that coaxial arrangement and the axis of left half axle 5 and right axle shaft pass through inner sleeve 2;The outer ring surface and housing of the inner sleeve 2
It is provided with semiaxis 6 and lower semiaxis 7 between the inner ring surface of ring 3, the upper semiaxis 6 and the coaxial arrangement of lower semiaxis 7 and upper semiaxis 6
The center of circle for passing through inner sleeve 2 with the axis of lower semiaxis 7;The axis of the axis and left half axle 5 and right axle shaft of upper semiaxis 6 and lower semiaxis 7
Line is vertical;The upper semiaxis 6, lower semiaxis 7, left half axle 5 and right axle shaft by can relative rotation and coaxial arrangement 8 and of inner sleeve
Outer tube 9 is set with.
In use, hollow guiding pipe 1 can be swung up and down centered on left half axle 5 and right axle shaft on inner sleeve 2, inner sleeve
It can swing centered on 2 or more semiaxis 6 of ring and lower semiaxis 7, the comprehensive guiding of hollow guiding pipe 1 thus may be implemented
Setting.
Certainly, it uses for convenience, connecting plate 10 and connecting seat 11 can also be set on outer sleeve 3, connect for fixed
It is connected on various holders.
The inner sleeve 2 is the annular hollow pipe that air pump is connected by high-pressure air pipe, and valve cock is provided on inner sleeve 2
13, and high-pressure air pipe is connected by the valve cock 13.Upper semiaxis 6, lower semiaxis 7, left half axle 5 are identical with the structure of right axle shaft, with
For upper semiaxis 6, as shown in Fig. 2, one end of the outer tube 9 connects inner sleeve 8, outer tube by rotatable snap ring
9 other end is fixedly connected on hollow guiding pipe 1 or outer sleeve 3, and the inner cavity of outer tube 9 is the small taper blind hole of outer imperial palace
91, the upper end of the blind hole 91 is with the inside and outside stomata 92 of connection;The inner sleeve 2 is the ring that air pump is connected by high-pressure air pipe
One end of shape hollow pipe, the inner sleeve 8 is fixedly connected on inner sleeve 2 and is connected to the tube chamber of inner sleeve 2, inner sleeve 8
Piston 81 is installed, the inner end of the piston 81 is axially displaceably mounted in the inner cavity of inner sleeve 8, piston 81 in inner cavity
Outer end is in the inner cavity of outer tube 9 and matching cone.When air pump by high-pressure air pipe and gas nozzle 13 to inner sleeve
When ring 2 is inflated, piston 81 pops up, and the cone of outer end is tightly attached on the inner wall of outer tube 9, by outer tube 9 and inner sleeve 8
Position is fixed;Conversely, when air pump generates negative pressure by high-pressure air pipe and gas nozzle 13 in inner sleeve 2, on outer tube 9
Stomata is in communication with the outside, and the pressure of 91 upper end of blind hole is more than the pressure in inner sleeve 2, and piston 81 is sprung back, outer tube 9 and inner sleeve
2 are freely rotatable.
The scale for indicating relative position is provided on the outer tube wall of 9 joining place of the inner sleeve 8 and outer tube.Hollow guiding
After the direction position of pipe 1 is fixed, the angle for recording 9 relative rotation of inner sleeve 8 and outer tube on each semiaxis can determine sky
The position coordinates of heart guide pipe 1.Two boss 82,83 disposed in parallel is carried in the inner cavity of the inner sleeve 8, the piston 81
Inner end is the cylinder between two boss.In this way, boss 82,83 can limit the motion amplitude of the pop-up of piston 81,
Improve the precision of locating speed and positioning.
In use, making patient lies supine position, position is stretched after keeping neck;Continue skull traction under C-arm X-ray machine just, side position as see
Examine odontoid fracture reset;Using the midpoint of C2 centrum lower edges as entry point, sighting device is installed in place;X-ray normotopia, side position are thoroughly
Depending on, it opens air pump and generates negative pressure, manipulate hollow guiding pipe normotopia and be located at cdontoid process central axes, vertex after the opposite direction cdontoid process of side position,
After location determination, opens air pump and generate high pressure by the locking of hollow guiding pipe position;1.2mm Kirschner wires are drawn in guider with electric drill
It leads down and squeezes into cdontoid process, after positive lateral projection is errorless, with the hollow drill bit of 3.0 mm of outer diameter along Kirschner wire reaming, be screwed into a diameter of
The hollow cancellous bone pressurization titanium screw of the appropriate length of 3.5 mm.