JP2001346803A - Locating device for vertebra fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety in operations by inserting a vertebra fixture reliably so as to keep away from a vertebral canal when the vertebra fixture serving as a material buried in organism is inserted into a vertebral body in a surgical vertebral operation. SOLUTION: In a locating device for a vertebra fixture 1, when a vertebral screw 9 is inserted into the vertebral body 7, a hole is made on the vertebral body 7 with a drill for drilling vertebral body (not shown) through an opening 3 of the locating device 1 in a state that an arm 2 of the locating device is pressed on an end of a head of rib. Subsequently, the location device 1 is detached from the vertebral body 7, and then, the vertebral screw 9 is inserted along the hole made with the drill.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertebral body fixing device for safely inserting a vertebral body fixing device into a vertebral body when the vertebral body fixing device is implanted into the vertebral body for spine surgery. Positioner

[0002]

2. Description of the Related Art Conventionally, when performing spine surgery, for example, for correcting spinal deformity of a patient with scoliosis, or treating spinal injuries or tumors,
2. Description of the Related Art A treatment method for fixing vertebral bodies using a metal implantable material such as a vertebral body screw and a rod connecting the vertebral body screw has been adopted. Therefore, conventionally, when a vertebral body screw is inserted into a vertebral body, if a spinal canal is located behind the spinal column and the spinal cord in the spinal canal is damaged by a vertebral body fixture, complications such as lower body paralysis are caused. Conventionally, surgery has been performed by inserting a vertebral body fixture into a vertebral body without damaging the spinal cord in the spinal canal, based on the experience and feeling of a skilled doctor.

Conventionally, there is no device that determines the position and orientation so as not to injure the spinal cord in the spinal canal. Since the biological criteria for guiding the insertion position and direction of the vertebral body screw could not be confirmed until now, there is no surgical instrument that can be mechanically guided, and surgery is performed based on the experience and feeling of the doctor. Have been.

Conventionally, when a vertebral body fixture is inserted into a vertebral body, there is no surgical instrument for determining a position and a direction in which the vertebral body fixture is safely inserted.

When performing the above-mentioned operation of the spine, it is usual to insert a vertebral body fixture into the vertebral body and to perform a corrective treatment for scoliosis, a spinal injury or a tumor treatment. When the vertebral body fixture is inserted into the vertebral body, the spinal cord in the spinal canal may be damaged by the vertebral body fixture, resulting in complications such as paralysis.

However, as a technique for inserting the vertebral body fixture into the vertebral body, the position and direction of the insertion are left to the experience and feeling of the surgeon performing the operation.

Accordingly, it is an object of the present invention to provide a vertebral body fixing tool positioner having a guide function capable of safely inserting a vertebral body fixing tool into a vertebral body without relying on the experience and feeling of a skilled doctor. And

[0007]

SUMMARY OF THE INVENTION A vertebral body fixation device positioner according to the present invention has, for example, an opening capable of guiding an insertion position and a direction of a vertebral body screw as an implant, and an arm capable of guiding a rib head. This device allows the vertebral body screw to avoid the spinal canal and to be safely inserted by the mutual positional relationship.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a state in which a vertebral body fixture, for example, a vertebral body screw 9 and a rod 10 for connecting each vertebral body screw 9 are inserted into the spinal column from the side of the spinal column. FIG. 1 shows a case in which a vertebral body fixture such as a vertebral body screw 9 is inserted into each vertebral body 7 for a patient with scoliosis and a rod 10 is attached to the vertebral body screw 9 to correct the scoliotic spine. FIG. Here, FIG.
2 shows a cross-sectional view of the screwed vertebral body 7 of FIG. Where the spinal canal 1
Vertebral body screw 9 must be screwed into vertebral body 7 without damaging 1

FIG. 3 shows a vertebral body fixation device 1 having an opening 3 for determining the position and direction of insertion of the vertebral body screw 9 and an arm 2 for guiding the rib head 6. When inserting the vertebral body screw 9 into the vertebral body 7, the vertebral body fixture positioning device 1 pushes the arm 2 of the vertebral body fixing device 1 against the tip of the rib head 6 as shown in FIG. A hole is made in the vertebral body 7 from the opening 3 of the vertebral body fixture positioning device 1 with a vertebral body perforation drill (not shown). The vertebral body screw 9 is inserted along. As shown in FIG. 5, since the rib head 6 is biologically positioned so as to cover the spinal canal 11, the vertebral body fixture positioning device 1 of the present invention is used with the tip of the rib head 6 as a reference. If you insert screw 9,
The spinal cord in the spinal canal 11 is not damaged by the vertebral body screw 9. In addition, the opening 3 of the vertebral body fixing tool positioner 1 is angled in the forward direction of the vertebral body 7, and is shaped so that it can be inserted in a safer direction.

FIG. 6 is a sectional view of the vertebral body 7 and the vertebral body fixation device locator 1 when the vertebral body fixation device locator 1 is used. In this state, the opening 3 of the vertebral body fixing tool positioner 1 is opened.
A hole is made in the vertebral body 7 with a vertebral body drill (not shown). Thereafter, the vertebral body fixing tool positioner 1 is removed from the vertebral body 7, and the vertebral body screw 9 is moved along the hole formed by the vertebral body drill.
Insert Thus, a vertebral body fixture such as a vertebral body screw 9
Can be inserted around the spinal canal 11.

According to the present invention, when a vertebral body fixture is inserted into a vertebral body in a spine operation, the vertebral body fixture can be accurately and safely inserted into the vertebral body without relying on the experience and feeling of a doctor. can do. ADVANTAGE OF THE INVENTION According to this invention, the operation | movement which inserts a vertebral body fixture is performed mechanically, operation | movement time is shortened, and operation | movement is performed reliably.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which a vertebral body screw and a rod are inserted into the spine (view from the side of the spine)

FIG. 2 is a cross-sectional view of a vertebral body having a vertebral body screw inserted therein.

FIG. 3 is a vertebral body fixing tool positioner of the present invention.

FIG. 4 shows an embodiment of the vertebral body fixing tool positioner of the present invention (a view from the side of the spine).

FIG. 5 is a sectional view of a vertebral body.

FIG. 6 is an embodiment (cross-sectional view) of the vertebral body fixing tool positioner of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertebral fixture positioning device 2 Arm 3 Opening 4 Positioner gripper 5 Rib 6 Rib head 7 Vertebral body 8 Bone fragment 9 Vertebral body screw 10 Rod 11 Spinal canal

Claims (3)

[Claims] 1. A vertebral body fixing device having a function of fixing a vertebral body, for example, a vertebral body screw has an opening which can be inserted in a certain direction of the vertebral body for accurate and safe fixation to the vertebral body. Vertebral body fixation device 2. The positional relationship between the spinal canal of a living body and the rib head,
2. The vertebral body fixation device according to claim 1, further comprising an opening for inserting a vertebral body screw and an arm for guiding a tip of a rib head. 3. The vertebral body fixation device according to claim 2, wherein the opening is angled forward of the spinal column so as to avoid inside the spinal canal where the spinal cord is located.