CN208481449U

CN208481449U - Eccentric guide cone with orientation cutter

Info

Publication number: CN208481449U
Application number: CN201721837856.XU
Authority: CN
Inventors: 刘兰泽
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2019-02-12
Anticipated expiration: 2027-12-26

Abstract

A kind of eccentric guide cone of band orientation cutter, including taper shank, cone bar and conehead, conehead action of points point and the cone bar central axis are eccentric structure；Conehead includes the flat cone section and subsequent pyramid section of front；The flat cone section and pyramid section are an integral molding structure；The bottom surface of the flat cone and the bottom surface of the pyramid are same plane；The central location of plane where the vertical rib of the pyramid is placed in the upper surface of described flat cone, the top edge of the vertical rib puts the first edge on a knife or a pair of scissors to form orientation cutter；The tail portion of cone bar is provided with a leading mark, and the vertical rib of the leading mark and the pyramid is in the same face.This guide cone, structure is simple, easy to operate, at low cost, and precision is high, improves operating efficiency, can effectively avoid inner sidewall spalling while accurately cutting pedicle of vertebral arch outer wall.

Description

Eccentric guide cone with orientation cutter

Technical field

The utility model relates to the orientations used when a kind of screw-rod system installs pedicle nail to isolate instrument, especially A kind of eccentric guide cone of band orientation cutter, belongs to the medical instrument that posterior lumbar spinal surgery uses.

Background technique

Currently, some patientss pedicle of vertebral arch is due to thin when carrying out way of escape incision nail-stick system replacement and fixation to fracture of lumbar vertebra Small (diameter is less than pedicle nail diameter), pedicle nail merging is difficult, is screwed into can lead to pedicle of vertebral arch spalling by force, on the inside of pedicle of vertebral arch Wall spalling may cause neurotrosis, cannot play the role of replacement and fixation using the tiny pedicle nail of diameter.

Also there is guide instrument when carrying out way of escape incision for fracture of lumbar vertebra at present, but table structure is more complicated mostly, Be made from multiple components, need to assemble positioning and guiding, not only waste time it is more, but also make and operation when precision is wanted Ask higher, at high cost, time-consuming and laborious, low efficiency when use, precision is low.

Utility model content

The utility model is that for technical defects mentioned in the background art, it is simple to provide a kind of structure, easy to make, behaviour It is convenient to make, the eccentric guide cone with orientation cutter that precision is high, high-efficient.

For achieving the above object, the technical solution adopted in the utility model is: a kind of bias of band orientation cutter is led To cone, including taper shank, cone bar and conehead,

The conehead action of points point and the cone bar central axis are eccentric structure；

The conehead includes the flat cone section and subsequent pyramid section of front；The flat cone section and pyramid section are integrally formed knot Structure；The bottom surface of the flat cone and the bottom surface of the pyramid are same plane；The vertical rib of the pyramid is placed in the upper surface of described flat cone It puts the first edge on a knife or a pair of scissors to form orientation cutter in the top edge of the central location of place plane, the vertical rib；

The tail portion of the cone bar is provided with a leading mark, and the vertical rib of the leading mark and the pyramid is in the same face.

Preferably, cone bar is the conical body of rod that tail end is thick, front end is thin；The leading mark is located at the cone bar and institute Taper shank connecting portion is stated, the leading mark is the oval structure of plane.

Preferably, flat cone section and pyramid section boundary position are bevel structure.

Preferably, the entire outer diameter of pyramid section is less than or equal to the outer diameter of the cone bar front end.

Preferably, the section of pyramid section is trigone wimble structure.

Compared with prior art, this guide cone disclosed in the utility model, structure is simple, easy to operate, at low cost, Precision is high, improves operating efficiency, can effectively avoid inner sidewall spalling while accurately cutting pedicle of vertebral arch outer wall.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model.

Fig. 2 is the partial enlarged view in Fig. 1.

Fig. 3 is the A direction view in Fig. 1.

Fig. 4 is the B-B direction view in Fig. 3.

In figure: taper shank 1, leading mark 2 bore bar 3, conehead 4, pyramid section 5, flat cone section 6, orientation cutter 7.

Specific embodiment

The utility model is described further with reference to the accompanying drawings and examples.

Referring to attached drawing 1-4, this guide cone disclosed in the utility model is a kind of screw-rod system installation pedicle of vertebral arch The orientation used when nail isolates instrument.

The eccentric guide cone of this band orientation cutter, including taper shank 1, leading mark 2, cone bar 3, conehead 4, pyramid section 5 are flat Section 6 is bored, cutter 7 is oriented.

Conehead action of points point, that is, action center and the cone bar central axis are eccentric structure.Conehead includes front half Flat cone section and below the pyramid section of half.Flat cone section and pyramid section are an integral molding structure, and flat cone section, which relatively bores bar side, to be made For guide rod.The section of pyramid section is trigone wimble structure, and as three sides, one side and the bottom surface of flat cone are put down to be same Face, the as continuity of guide rod are connected with cone bar.The junction of another two side is prismatic protrusion, and as vertical rib, pyramid is stood The central location (along axial direction) of plane where rib is placed in the upper surface of flat cone, the top edge of vertical rib put the first edge on a knife or a pair of scissors to form orientation cutter.Flat cone Section is bevel structure with pyramid section boundary position.The entire outer diameter of pyramid section is less than or equal to the outer diameter of the cone bar front end.

The tail portion of cone bar is provided with a leading mark, and the vertical rib of leading mark and the pyramid is in the same face.Cone bar is tail The conical body of rod that end is thick, front end is thin.Leading mark is located at the cone bar and the taper shank connecting portion, leading mark are plane Oval structure.

It is with 2 vertebral fracture patient of waist (1 pedicle of vertebral arch of waist is tiny) row screw-rod system short segment replacement and fixation art below Example, the utility model is described in further detail:

Operating process is summarized as follows:

Patient lies prone position, way of escape median incision successively cut and appear 1,2,3 vertebral plate of waist, spinous process, articular process, transverse process, according to Routine sets nail method choice waist 1,3 pedicle of vertebral arch entry points, and is put into pilot pin and has an X-rayed confirmation accurate positioning through C- arm machine.It is fixed to take out For position needle by guide rod (i.e. the flat cone section of leading portion) the insertion 1 pedicle of vertebral arch proximal bore of waist of guide cone, orientation cutter is located at vertebral arch On the outside of root, direction is grasped, guide cone is pushed into 1 centrum of waist along 1 pedicle of vertebral arch of waist in the same face by telltale mark and orientation cutter, In progradation, orientation cutter contacts with pedicle of vertebral arch outer wall and carries out squeezing swollen and cutting, takes out guide cone, pedicle of vertebral arch probe finds out Pedicle of vertebral arch outer wall has isolated, and is screwed into suitable diameter pedicle nail.It is conventional to be placed in pedicle nail in waist 3, place vertical connecting bar, locking Tail is followed closely, hurts vertebra replacement and fixation and finishes.Layer-by-layer close incisions, art finish.

Claims

1. a kind of eccentric guide cone of band orientation cutter, including taper shank, cone bar and conehead, it is characterised in that:

The conehead includes the flat cone section and subsequent pyramid section of front；The flat cone section and pyramid section are an integral molding structure； The bottom surface of the flat cone and the bottom surface of the pyramid are same plane；The vertical rib of the pyramid is placed in where the upper surface of described flat cone It puts the first edge on a knife or a pair of scissors to form orientation cutter in the top edge of the central location of plane, the vertical rib；

2. the eccentric guide cone of band according to claim 1 orientation cutter, which is characterized in that the cone bar be tail end slightly, The thin conical body of rod in front end；The leading mark is located at the cone bar and the taper shank connecting portion, the leading mark are The oval structure of plane.

3. the eccentric guide cone of band orientation cutter according to claim 1, which is characterized in that the flat cone section and pyramid section Boundary position is bevel structure.

4. the eccentric guide cone of band orientation cutter according to claim 1, which is characterized in that the entirety of the pyramid section is outer Diameter is less than or equal to the outer diameter of the cone bar front end.

5. the eccentric guide cone of band orientation cutter according to claim 1, which is characterized in that the section of the pyramid section is Trigone wimble structure.