CN200987699Y

CN200987699Y - Pediculus arcus vertebrae pin implanting guiding device

Info

Publication number: CN200987699Y
Application number: CN 200620077345
Authority: CN
Inventors: 李超
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-16
Filing date: 2006-09-16
Publication date: 2007-12-12
Anticipated expiration: 2016-09-16

Abstract

A pedicle screw implantation guide apparatus is a fan protractor (2) with one end of a vertical column (1) fixed with a central angle with an angle from 10 to 15DEG; The vertical column (1) is provided with a sliding sleeve (3), and the sliding sleeve (3) is provide with a nut (4), at the same time, is fixed with a scale (5) and (6). The scale (5) and (6) is vertical mutually with the vertical column (1). The guide apparatus is used for the pedicle screw fixation operation, and can make the operation quickly and accurately fix the nail inlet angle, which ensures the success of the operation though the doctor has less clinical experiences.

Description

Guiding means for putting vertebral arch pedicle nail

One, technical field

This utility model relates to a kind of medical apparatus and instruments, and particularly a kind of medical apparatus and instruments of using of bone internal fixation exactly is a kind of guiding means for putting vertebral arch pedicle nail.

Two, background technology

Usually need operation to correct during the protruding or swing offset of human spine's side to reset.First-selected pedicle nail internal fixation system three-dimensional correction, the system of putting forth effort that Here it is forms by the pedicle nail of inserting to the vertebral plate direction from pedicle of vertebral arch realizes or support or press or draw or commentaries on classics etc. is corrected.Therefore, putting the nail technology accurately is the operation key of success.

Vertebral body has coronalplane, sagittal plane and horizontal plane (cross section) three dimensional structure in anatomy, and coronalplane, sagittal plane, horizontal plane are vertical mutually.Putting the nail technology mainly comprises definite entry point and advances to follow closely angle (promptly with sagittal angle).Being generally acknowledged in view of the T1-12 entry point, therefore hold and advance to follow closely the real key that belongs in the key of angle, also is the difficulty in the operation most important thing, the technology difficulty.Because this sagittal plane and coronalplane of advancing to follow closely angle and place vertebral body are closely related, concerning a vertebral body that has been out of shape particularly swing offset, tiny spinous process, transverse process many along with the tractive of muscle torsional deformation, normal anatomical parameters can not be suitable for, can only determine into nail angle in conjunction with clinical experience according to CT examination result before the art.Pedicle nail diameter 3mm, the wide lumbar vertebra 6～8mm of pedicle of vertebral arch, thoracic vertebra 5～6mm, cervical vertebra be 4mm only, careless slightlyly will cause operative failure.

Three, summary of the invention

Guiding means for putting vertebral arch pedicle nail provided by the utility model (calling guider in the following text) is intended to determine quickly and accurately when inserting pedicle nail in the posterior approach into nail angle.Technical problem to be solved is promptly to find the vertebral body coronalplane accurately.

This guider as shown in Figure 1.One end of one root post 1 is fixed with the fan-shaped protractor 2 that central angle is 10～50 degree, and the angle index line is arranged on the protractor 2; Sliding sleeve 3 is arranged on the column 1, and sliding sleeve 3 can be fixed on the column 1 by screw 4; Also be fixed with two

scales

5 and 6 on the sliding sleeve 3; Scale 5 with 6 all perpendicular to column 1 and mutually vertical, when

scale

5 and 6 is "+" font at grade the time, when not at grade the time formation antarafacial vertical.

Column 1 plays the sagittal effect of sign vertebral body, also claims the sagittal plane scale, shown in A-A ' among Fig. 2; The plane at

scale

5 and 6 places plays a part to indicate the vertebral body coronalplane, also claims the coronalplane scale, shown in B-B ' among Fig. 2 and C-C '; Protractor 2 works to indicate the vertebral body horizontal plane.

Described column 1 works the sagittal effect that indicates, and its meaning is meant that column 1 is parallel to the sagittal plane of vertebral body,

scale

5 and 6 and the marked effect of protractor 2 as the same.

In vertebral body, coronalplane can be represented in the vertebral plate plane, and sagittal plane can be represented in the spinous process side.In posterior approach, can manifest vertebral plate, spinous process and the transverse process of vertebral body.Because vertebral body deformation displacement, particularly spinous process, transverse process is all twisted, so only there is the coronalplane can be as reliable reference plane of when operation.In a single day coronalplane is determined, uses sagittal plane scale in this guider (being column 1) and coronalplane scale (being scale 5 and 6) and protractor 2, can determine into nail angle exactly, thus the success even the few doctor of assurance clinical experience also can perform the operation.

Four, description of drawings

Fig. 1, Fig. 2, Figure 3 shows that the structural representation of this guider.Wherein Fig. 1 is a front view, surplus left view and the vertical view of being followed successively by.

Figure 4 shows that this guider instructs the into use sketch map of nail angle, dotted line A-D is depicted as the axis of the pedicle nail of inserting among the figure.

Five, the specific embodiment

This guider non-limiting examples is described below:

1, as Figure 1-3.With the rustless steel is material, processing column 1, long 250mm, Φ 3.5mm; One end rivet clasp has fan-shaped protractor 2, central angle 50 degree, and be carved with 5～10 scales of spending.

The sliding sleeve 3 that interference fit is arranged on the column 1, long 25mm, external diameter 8mm; The screw 4 of fixation has been arranged on the sliding sleeve 3, also has been fixed with

scale

5 and 6, long 35mm, φ 2mm scale 5 with 6 all perpendicular to column 1 and vertical mutually at grade "+" font that is.

2, as shown in Figure 4.

The applicant carried out deep anatomical research and measurement to vertebral body, the plane at vertebral body both sides superior articular process's trailing edge and inferior articular process lower edge place, both sides promptly is the coronalplane of vertebral body, rotate sliding sleeve 3, it is fixing with sliding sleeve 3 that coronalplane scale B-B`, C-C` are indicated behind the coronalplane of vertebral body, and firm guider, with reference to CT examination result before the art, advance to follow closely angle according to different vertebral body individuations, such as thoracic vertebra is 10～15 degree, and pedicle nail is inserted in the vertebral body along corresponding graduation mark on the protractor 2.

Claims

1, a kind of guiding means for putting vertebral arch pedicle nail is characterized in that: working column (1) one end that indicates the sagittal plane effect, to be fixed with central angle be 10～50 degree and the fan-shaped protractor (2) that the angle index line is arranged; Sliding sleeve (3) is arranged on the column (1), the screw (4) of fixation has been arranged on the sliding sleeve (3), also be fixed with the scale (5) and (6) that indicate the coronalplane effect, scale (5) and (6) are all perpendicular to column (1) and mutual vertical.

2, guider according to claim 1 is characterized in that: scale (5) and (6) are all perpendicular to column (1) and vertical mutually at grade " ten " font that is.

3, guider according to claim 1 is characterized in that: scale (5) is all vertical perpendicular to column (1) and mutual antarafacial with (6).