CN213465290U

CN213465290U - Vertical plane positioner for vertebral arch pedicle

Info

Publication number: CN213465290U
Application number: CN202021674149.5U
Authority: CN
Inventors: 邓迎生
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-06-18
Anticipated expiration: 2030-08-12

Abstract

The utility model discloses a pedicle of vertebral arch plumbing locator, including slider, horizontal slide bar and two vertical posts of setting above slider and horizontal slide bar, horizontal spout has been seted up to the slider, and the activity of horizontal slide bar sets up in horizontal spout, is provided with locking member on the slider, and two vertical posts are all vertical to have seted up the groove of ruling. The utility model discloses simple structure, high durability and convenient use, slider through on the removal horizontal slide bar makes two longitudinal column clamp spinous process both sides, pass the groove of ruling again and observe and adjust the left side and draw the wire casing and aim at left side pedicle of vertebral arch axis plumb line, and draw out pedicle of vertebral arch axis plumb line at the spinous process offside corresponding position with the groove of ruling on electric knife along the right side, and then confirm the pedicle of vertebral arch plumb line, finally obtain the pedicle of vertebral arch cross section, in order to eliminate the every single move inclination to the influence of advancing the nail direction, avoid pedicle of vertebral arch screw from the upper wall of pedicle of vertebral arch, the lower wall, in.

Description

Vertical plane positioner for vertebral arch pedicle

Technical Field

The utility model belongs to the field of orthopedic surgery instruments, a auxiliary device for internal fixation operation of vertebral pedicle screws is related to, concretely relates to vertebral pedicle vertical plane locator.

Background

The spine pedicle of vertebral arch channel screw internal fixation operation is the basic technology of modern spine surgery, and the vertebral arch channel screw passes through the narrow pedicle of vertebral arch channel of the vertebral arch to fix the spine based on the anatomical characteristics of the vertebral arch. The vertebral body belongs to an irregular bone, the anatomy and the complexity are realized, the pedicle of vertebral arch channel not only has an external inclination angle relative to the sagittal plane of a human body, but also has a pitching inclination angle relative to the cross section of the vertebral body, the internal and external diameters and the upper and lower diameters of the pedicle of vertebral arch are both very narrow, particularly, the narrowest part of the pedicle of vertebral arch channel is less than 5mm in the cervical vertebra and the upper thoracic vertebra, the external inclination angle and the pitching inclination angle have slight deviation, the bone cortex of the pedicle of vertebral arch can be broken through by the circuit breaker, the scientific research requirements can not be met (the screw is accurately positioned and can be successfully placed once), the difficulty in adjustment in the operation is very high. Therefore, the requirement of the internal fixation operation of the vertebral pedicle channel screw on the screw feeding direction of the spinal vertebral pedicle channel screw is extremely high, whether the screw feeding direction of the vertebral pedicle channel screw can be accurately determined becomes one of key factors for determining the success or failure of the operation on the premise of accurately positioning the screw feeding point in the operation process, the determination of the screw feeding direction needs to determine the central axis of the vertebral pedicle channel on the vertebra through a pitching inclination angle (an included angle between a central axis vertical line of the vertebral pedicle channel and a central cross section of the vertebral body on a CT sagittal plane or a lateral X-ray plate) and an internal inclination angle (an included angle between the central axis of the vertebral pedicle channel and the central axis of the vertebral body on a CT transverse plane, which cannot be. Currently, there is no standardized measurement method for pitch tilt measurement during surgery.

In order to eliminate the influence of the pitching inclination angle on the nail feeding direction, the pitching inclination angle is measured and evaluated by adopting the included angle between the perpendicular line of the central axis of the pedicle channel and the lower edge of the spinous process, so that the pitching inclination angle is more in line with the actual situation, and the success rate of the operation is favorably improved.

In order to eliminate the influence of the pitching inclination angle on the nail feeding direction, the perpendicular line of the central axis of the pedicle channel is drawn on the left side of the spinous process by using the protractor for the included angle between the perpendicular line of the central axis of the pedicle channel and the lower edge of the spinous process, but the positioning of the spinous process on one side easily causes the rotation of the positioner to influence the accuracy of the camber angle and the pitching inclination angle, and a line segment in the same direction must be drawn at the same position of the spinous process on the right side. Generally, a ruler, a protractor and other measuring tools are used to draw a perpendicular line of the central axis of the pedicle on one side of the spinous process, so as to determine the transverse section of the pedicle on the vertebra. However, because the outer surface of the spinous process is uneven, it is difficult to accurately determine the perpendicular line of the central axis of the pedicle of vertebral arch on the other side by observing the perpendicular line of the central axis of vertebral arch on one side of the spinous process, and when the perpendicular line of the central axis of vertebral arch is inaccurate, the pedicle screw penetrates out of cortical bone from the upper wall, the lower wall, the inner side wall and the outer side wall of the pedicle of vertebral arch, thereby. Therefore, a device capable of marking out the central axis perpendicular lines of the vertebral pedicle at two sides of the spinous process of the vertebra so as to determine the vertical plane of the vertebral pedicle is absent at present, and the transverse plane of the vertebral pedicle can be accurately determined by utilizing the vertical plane of the vertebral pedicle so as to eliminate the influence of the pitching inclination angle on the nail feeding direction.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pedicle of vertebral arch plumbing face locator uses pedicle of vertebral arch passageway axis plumb line-spinous process lower edge contained angle protractor to draw out the plumb line of pedicle of vertebral arch passageway axis in the left side of this spinous process after, draws out pedicle of vertebral arch axis plumb line in the same direction of the offside same position of spinous process through vertical column, and then confirms the pedicle of vertebral arch plumbing face, finally obtains the pedicle of vertebral arch cross section to eliminate the every single move inclination to the influence of advancing the nail direction.

The utility model discloses the technical scheme who adopts:

a pedicle of vertebral arch vertical plane locator, including the slide block, horizontal slide bar and two sets of longitudinal columns above slide block and horizontal slide bar, form the structure of "door" font, the said slide block has horizontal concrete chute, the horizontal slide bar activity sets up in the horizontal concrete chute, there are locking members on the slide block, used for locking the horizontal slide bar in the horizontal concrete chute, two longitudinal columns have marking groove vertically, use pedicle of vertebral arch channel central axis vertical line-spinous process lower edge angle protractor to draw the vertical line of central axis of the channel on the left side of the spinous process in the marking groove on the left side, and use the locating plate to block the spinous process, promote the slide block to make the two sides of the spinous process close to the column and vertically block the left and right sides of the spinous process, and draw the central axis vertical line of vertebral arch at the right side of the spinous process along the marking groove on the right side with the, then the transverse section of the vertebral pedicle is determined by the vertical plane of the vertebral pedicle.

Furthermore, the locking component comprises a threaded hole formed in the sliding block and a locking handle in threaded connection with the threaded hole, the locking handle can be screwed into the threaded hole to fix the sliding rod in the transverse sliding groove, and meanwhile, a doctor can conveniently hold the sliding rod.

Furthermore, the connecting part of the transverse sliding rod and the longitudinal column is detachably provided with a handheld handle, so that the distance between the two longitudinal columns can be conveniently adjusted.

Furthermore, the vertical arrangement of vertical post has seted up the fixed orifices, sets up fixed needle in the fixed orifices, and fixed needle passes the fixed orifices, fixes vertical post on the spinous process, appears shifting when avoiding the setting-out.

Furthermore, a positioning groove is vertically formed in the longitudinal column, a positioning plate is arranged in the positioning groove, and the positioning plate penetrates through the positioning groove and abuts against the perpendicular line of the central axis of the vertebral pedicle on the spinous process, so that the longitudinal column is parallel to the perpendicular line of the central axis of the vertebral pedicle.

Furthermore, the positioning plate is designed to be of a plate-shaped structure with an L-shaped notch, and can be clamped above the spinous process when in use to play a role in supporting the longitudinal column and fit the outer surface of the spinous process better.

The utility model has the advantages that:

1. the utility model has simple structure and convenient use;

2. the utility model discloses a slider on the horizontal slide bar of removal makes two longitudinal column clamp spinous processes both sides, pass the groove of ruling again and observe and adjust the left side and draw the wire casing and aim at left side pedicle of vertebral arch axis plumb line, and draw out pedicle of vertebral arch axis plumb line at the spinous process offside corresponding position with the groove of ruling along the right side, and then confirm the pedicle of vertebral arch vertical plane, finally obtain the pedicle of vertebral arch cross section, in order to eliminate the every single move inclination to the influence of advancing the nail direction, avoid the pedicle of vertebral arch screw to follow the upper wall of pedicle of vertebral arch, the lower wall, in, the cortical bone is.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the usage state of the present invention.

In the figure: 1. a transverse sliding bar; 2. a slider; 3. a locking handle; 4. a handle; 5. a longitudinal column; 6. marking a groove; 7. a fixing hole; 8. a fixing pin; 9. positioning a groove; 10. positioning a plate; 11. a spinous process; 12. transverse process; 13. the superior articular process; 14. a pedicle of a vertebral arch; 15. a vertebral foramen; 16. a vertebral body.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present invention will be described in detail with reference to the accompanying drawings and embodiments.

As shown in figure 1, a vertical plane positioner for vertebral pedicle comprises a slide block 2, a transverse slide rod 1 and two longitudinal columns 5 arranged above the slide block 2 and the transverse slide rod 1 to form a structure shaped like a Chinese character 'men', the slide block 2 is provided with a transverse slide groove, the transverse slide rod 1 is movably arranged in the transverse slide groove, a hand-held handle 4 is detachably arranged at the joint of the transverse slide rod 1 and the longitudinal columns 5 to facilitate the adjustment of the distance between the two longitudinal columns 5, a locking member is arranged on the slide block 2 and comprises a threaded hole arranged on the slide block 2 and a locking handle 3 in threaded connection with the threaded hole, the locking handle 3 can be screwed into the threaded hole to fix the transverse slide rod 1 in the transverse slide groove and facilitate the doctor to grasp, scribing grooves 6 are vertically arranged on the two longitudinal columns 5, the longitudinal grooves 6 can observe and adjust the longitudinal columns 5 to be parallel to the central axis perpendicular line of the, vertical arrangement has seted up fixed orifices 7 on vertical post 5, set up fixed needle 8 in the fixed orifices 7, fixed needle 8 passes fixed orifices 7, fix vertical post 5 on the spinous process, the skew appears when avoiding the setting-out, vertical post 5 is last vertically to set up constant head tank 9, be provided with locating plate 10 in the constant head tank 9, locating plate 10 passes constant head tank 9 and supports on the spinous process, and keep being parallel with the plumb line of pedicle of vertebral arch axis, make vertical post 5 be parallel to the plumb line of pedicle of vertebral arch axis, locating plate 10 designs for the platelike structure that has L type breach, can block in the spinous process top during the use, play the effect of supporting vertical post 5, also can laminate the spinous process surface better simultaneously. And drawing a central axis perpendicular line of the vertebral pedicle at the corresponding position of the spinous process on the opposite side by using an electric knife along the drawing line groove on the right side, wherein the left and right drawing lines form a vertical plane of the central axis of the vertebral pedicle channel.

The principle of the utility model is as follows:

as shown in fig. 2, the vertebrae are composed of spinous process 11, transverse process 12, superior articular process 13, pedicle 14, vertebral foramen 15 and vertebral body 16, and when the vertebrae are damaged or have spinal cord disease, pedicle screws are implanted into adjacent vertebrae to fix the upper and lower vertebrae. Before use, the pitching inclination angle gamma of the central axis of the channel between the lower edge of the spinous process 9 and the vertebral pedicle is calculated according to the data of the three-dimensional CT and the like before operation, and then a measuring tool is used for drawing a perpendicular line of the central axis of the vertebral pedicle on one side of the spinous process 11; when in use, the transverse sliding rod 1 penetrates from the left lower part of the spinous process 11 to the interspinous ligament at the right lower part of the spinous process 11 and is inserted into the transverse sliding groove of the sliding block 2, the sliding block 2 is moved to enable the two longitudinal columns to clamp the two sides of the spinous process, and the locking handle 3 is screwed down to lock the transverse sliding rod 1 in the transverse sliding groove of the sliding block 2, the positioning plate 10 passes through the positioning groove of the longitudinal column 5, and adjusting the longitudinal column 5 to make the line drawing groove on the left side align with the line drawing on the left side, at the moment, the sagittal column is parallel to the central axis vertical line of the vertebral pedicle, the fixing needle 8 passes through the fixing hole 7 of the longitudinal column 5 and is screwed into the spinous process 11, the longitudinal column 5 is temporarily fixed on the spinous process 11, the central axis vertical line of the vertebral pedicle is drawn on the right side of the spinous process 11 along the line drawing groove 6 on the right side by using an electric knife, the central axis vertical lines of the vertebral pedicle on the two sides of the spinous process 11 determine the vertical plane of the vertebral pedicle, and the influence of the pitching inclination angle on the. If a kirschner wire is screwed in the vertical plane of the vertebral pedicle at the center of the spinous process 11, the lateral position of the vertebral column can be seen through a C-arm X-ray machine, and the kirschner wire is also proved to be parallel to the transverse plane of the vertebral pedicle, thereby eliminating the influence of the pitching inclination angle on the nail feeding direction.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the present invention is not limited by the appended claims.

Claims

1. A pedicle of vertebral arch vertical plane locator which characterized in that: the novel door-shaped structure comprises a sliding block, a transverse sliding rod and two longitudinal columns arranged above the sliding block and the transverse sliding rod, a door-shaped structure is formed, the sliding block is provided with a transverse sliding groove, the transverse sliding rod is movably arranged in the transverse sliding groove, a locking component is arranged on the sliding block, and two longitudinal columns are vertically provided with marking grooves.

2. The pedicle plumb locator of claim 1, wherein: the locking component comprises a threaded hole arranged on the sliding block and a locking handle in threaded connection with the threaded hole.

3. The pedicle plumb locator of claim 1, wherein: and a handheld handle is detachably arranged at the joint of the transverse sliding rod and the longitudinal column.

4. The pedicle plumb locator of claim 1, wherein: the vertical arrangement has seted up the fixed orifices on the vertical post, sets up fixed needle in the fixed orifices.

5. The pedicle plumb locator of claim 1, wherein: and the longitudinal column is vertically provided with a positioning groove, and a positioning plate is arranged in the positioning groove.

6. The pedicle plumb locator of claim 5, wherein: the positioning plate is designed into a plate-shaped structure with an L-shaped notch.