WO2012177087A2

WO2012177087A2 - Minimally invasive surgical instrument for spinal fixation

Info

Publication number: WO2012177087A2
Application number: PCT/KR2012/004965
Authority: WO
Inventors: 권현화
Original assignee: 메디소스플러스(주)
Priority date: 2011-06-22
Filing date: 2012-06-22
Publication date: 2012-12-27
Also published as: KR101067664B1; WO2012177087A3

Abstract

According to the present invention, a minimally invasive surgical instrument for spinal fixation comprises: a spinal fixing screw with a head having a rod-accommodation groove formed therein; two or more screw insertion tubes for guiding the spinal fixing screw to a spinal bone of a patient; and a sleeve tube which is accommodated in at least one of the two or more screw insertion tubes, and which has a sleeve for covering at least a portion of an open upper side of the rod-accommodation groove so as to prevent the rod placed in the rod-accommodation groove from escaping the rod-accommodation groove.

Description

Spinal Fixation Minimally Invasive Procedure

The present invention relates to a spinal stabilization apparatus, and more particularly to a spinal stabilization apparatus used for minimally invasive surgery (Minimally Invasive Surgery).

In general, a human spine is composed of a plurality of vertebral bones and a disk that cushions between each vertebral bone. These vertebrae not only help a person maintain his posture, but also form the basis of his movements and play an important role in protecting internal organs.

However, if an abnormal posture is maintained for a long time, or a degenerative disease caused by aging or an external shock, the disk of the spinal bone node may be damaged and the spinal disc disease may be caused. The connecting nerves are compressed, causing pain.

Therefore, the patient with the spinal disc removes the disc from the damaged part so that the damaged part of the vertebral bone is not pressed or pressed, and fills the disc with the bone fragment filled with an artificial support (cage) made of metal or plastic material. After inserting and fixing the vertebral fixation screw 1 into the vertebral bones of the damaged disc upper and lower portions as shown in FIG. 1, the rod 2 is connected to the vertebral fixation screw 1 to secure the distance between the vertebral bones. A method of fusion is normally performed. At this time, the rod 2 may be fixed by a fastening stopper 3 which is screwed with the head portion 1a in a state of passing through the head portion 1a of the spinal fixation screw 1 as shown in FIG. 1. have.

However, in such spinal surgery, it is essential to cut the skin of the damaged vertebral portion more than a certain size in order to fasten the spinal fixation screw (1) to the vertebral bone and then fasten the rod (2) to the spinal fixation screw (1). As it is required, there is a problem in that the invasive area is large, delaying the recovery of the patient and low surgical satisfaction due to the wound.

Therefore, recently, minimally invasive surgery (Minimally Invasive Surgery) techniques that can minimize the invasive area during spinal surgery has been developed and applied.

2 and 3 are perspective views showing an example of a conventional spinal fixation minimally invasive surgical device.

2 and 3, a conventional minimally invasive surgical device for spinal fixation is a support frame 11, two screw insertion tube 12 and one end portion 13a into which the spinal fixation screw 1 is inserted. (2) may include a rod inserter 13 to which it is coupled.

The screw insertion tube 12 is supported by the support frame 11. Specifically, the screw insertion tube 12 is coupled to the support frame 11 through the coupling block 14, the first adjustment screw 14a and the second adjustment screw 14b as shown in Figs. do. At this time, the screw insertion tube 12 is fixed by the first adjusting screw 14a in a state in which the coupling rod 12a formed at the upper end thereof is inserted and coupled, and the coupling block 14 passes through the support frame 11. Is fixed with respect to the support frame 11 by a second adjusting screw 14a. Due to this coupling structure, the screw insertion tube 12 can be adjusted in an angle within a predetermined range by loosening and retightening the first adjusting screw 14a, and unwinding and retightening the second adjusting screw 14b. The position can be adjusted along the longitudinal direction of the support frame 11 through this. On the other hand, at the rear end of the screw insertion tube 12, as shown in Figure 3, the head portion (1a) of the spinal fixation screw (1) inserted is formed, the rod through groove 12b through which the rod 2 is formed is formed. do. Instead of dissecting the patient's skin, the operator inserts the screw insertion tube 12 and inserts the screw insertion tube 12 into the screw insertion tube 12 through the screw insertion tube 12. ) Can be fastened to the vertebral bone by using a tool such as an electric screwdriver. In addition, the fastening stopper 3 to the head portion 1a of the spinal fixation screw 1 to fix the rod 2 to the spinal fixation screw 110 is also made through the screw insertion tube 12. Can be.

The rod inserter 13 is connected to the support frame 11 via the rotating arm 15 as shown in FIGS. 2 and 3. That is, the rod inserter 13 is provided to be rotatable with respect to the support frame 11 along a predetermined trajectory. The rod inserter 13 allows the operator to apply the force directly by hand to move the rod inserter 13 along a predetermined trajectory (moving from the position of FIG. 2 to the position of FIG. 3), thereby loading the rod inserter 13. The rod 2 coupled to one end of the c) may be positioned in the rod through groove 12b of the screw insertion tube 12 to be fastened to the head portion 1a of the spinal fixation screw 1.

4 and 5 are views for explaining the problem of the minimally invasive surgical apparatus of FIG.

As described above, since the rod 2 is moved along the trajectory having a constant curvature by the rod inserter 13, the rod 2 is attached to the head portion 1a of the spinal fixation screw 1 in the actual procedure. When initially positioned, the shape may be as shown in FIG. 4, that is, the right end of the rod 2 may be lifted above the head portion 1a.

Therefore, in order to fasten the fastening stopper 3 to the head portion 1a of the spinal fixation screw 1 disposed on the right side in FIG. 4, the right end of the rod 2 lifted using a separate tool or tool is used. In this case, the left end of the rod 2 may be lifted above the head portion 1a as shown in FIG. 5, which ultimately impairs the convenience and safety of the procedure. .

An object of the present invention is to provide a minimally invasive surgical device for spinal fixation that can prevent the rod located in the rod seating groove of the spinal fixation screw to be separated from the rod seating groove during the procedure to improve the convenience and safety of the procedure. .

The object is, according to the present invention, the spinal fixing screw having a head portion formed with a rod seating groove; Two or more screw insertion tubes for guiding the spinal fixation screw to the spinal bone of the patient; And a sleeve accommodated in at least one of the at least one screw insertion tube and covering at least a portion of an open upper side of the rod seating groove so that the rod positioned in the rod seating groove does not leave the rod seating groove. It is achieved by a minimally invasive surgical device for spinal fixation comprising a sleeve tube having a.

Preferably, the sleeve extends inward from the lower end of the side wall of the sleeve tube to cover the edge region of the rod seating groove.

The sleeve is formed of an annular step bent extending from the lower end of the side wall of the sleeve tube, the head portion may be coupled to the screw body portion to enable position adjustment with respect to the screw body portion of the spinal fixation screw.

The sleeve tube may be accommodated in a screw insertion tube to which the rod first approaches one of the two or more screw insertion tubes.

The minimally invasive surgical device for spinal fixation may further include a position fixing means for positioning the sleeve tube with respect to the screw insertion tube while the sleeve tube is accommodated inside the screw insertion tube.

The position fixing means may include a fixing protrusion protruding outward from the side wall of the sleeve tube; And a fixing groove formed in a side wall of the screw insertion tube to engage with the fixing protrusion to fix the sleeve tube.

The object is, according to the present invention, the spinal fixing screw having a head portion formed with a rod seating groove; And two or more screw insertion pipes for guiding the spinal fixation screw to the vertebral bone of the patient, wherein the head portion includes an opening of the rod seating groove so that the rod located in the rod seating groove is not separated from the rod seating groove. It is also achieved by a minimally invasive surgical device for spinal fixation, characterized in that a sleeve is provided covering at least a portion of the upper side.

Preferably, the sleeve extends inward from an upper end of the side wall of the head to cover an edge region of the rod seating groove.

The sleeve may be formed as a step extending from the upper end of the side wall of the head portion, the head portion may be coupled to the screw body portion to enable position adjustment with respect to the screw body portion of the spinal screw.

The minimally invasive surgical device for spinal fixation includes a fastening stopper for fastening the rod located in the rod seating groove in combination with the spinal fixation screw, wherein the fastening stopper includes a fastening part for screwing the sleeve; And a protrusion extending downward from the fastening part to contact and pressurize the rod. In this case, the protrusion may have a smaller diameter than the fastening portion.

The present invention, by having a configuration to prevent the rod located in the rod seating groove of the spinal fixing screw is separated from the rod seating groove during the procedure, the rod located in the rod seating groove of the spinal screw fixing over the rod seating groove during the procedure The inconvenience of having to lift and move it back to the position of the rod seating groove, thereby solving the problem of damage to the soft tissue of the patient, can ultimately improve the convenience and safety of the procedure.

1 is a perspective view for explaining the coupling relationship of the spinal fixing screw, rod and fastening stopper.

Figure 2 is a perspective view showing an example of a conventional spinal fixation minimally invasive surgical device.

Figure 3 is a perspective view for explaining the movement of the rod inserter in the minimally invasive surgical apparatus of FIG.

Figure 6 is a perspective view for explaining the minimally invasive surgical device for spinal fixation according to an embodiment of the present invention.

FIG. 7 is a view illustrating a state in which a sleeve tube is coupled to a screw insertion tube in the minimally invasive surgical device for spinal fixation of FIG. 6.

FIG. 8 is a schematic partial cross-sectional view for explaining the sleeve tube shown in FIG. 7.

Figure 9 is a perspective view for explaining a spinal fixation minimally invasive surgical apparatus according to another embodiment of the present invention.

10 is a schematic partial cross-sectional view for explaining a sleeve provided in the spinal column fixing screw of FIG.

FIG. 11 is a schematic partial cross-sectional view illustrating a state in which a fastening stopper is fastened to the spinal fixation screw in FIG. 10.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of functions or configurations already known will be omitted to clarify the gist of the present invention.

Figure 6 is a perspective view for explaining a minimally invasive surgical device for spinal fixation according to an embodiment of the present invention, Figure 7 is a state in which the sleeve tube is coupled to the screw insertion tube in the minimally invasive surgical device for spinal fixation of FIG. FIG. 8 is a schematic partial cross-sectional view for explaining the sleeve tube shown in FIG. 7.

6 to 8, the minimally invasive surgical device 100 for spinal fixation according to the present embodiment includes a spinal fixation screw 110, a screw insertion tube 120, a sleeve tube 130, and a fastening stopper 140. ) May be included.

In addition, although not shown in the accompanying drawings, the minimally invasive surgical device 100 for spinal fixation may further include a rod inserter (not shown). The rod inserter (not shown) is a means for moving the rod R to the position of the spinal fixation screw 110 by inserting the rod R through the soft tissue of the patient. Any one of a variety of known configurations can be selected, including the configuration of the rod inserter 13 disclosed in the invasive surgical device 10 (see FIGS. 2 and 3).

Spinal fixing screw 110 is fixed to the vertebral bones of the upper and lower parts of the damaged disk, as shown in Figure 6 and 8, the outer peripheral surface to be fastened to the head portion 111 and the spinal bone formed with the rod seating groove 113 It may include a screw body portion 112 is formed in the thread. At this time, the rod seating groove 113 has a structure in which the upper side is open. Accordingly, the rod R inserted through the soft tissue of the patient by a rod inserter (not shown) is screwed with the head 111 in a state seated on the head 111 of the spinal screw 110. The fastening stopper 140 may be fixed to the spinal fixation screw 110 by. At this time, the fastening stopper 140 is to be screwed with the head 111 of the spinal fixing screw 110, the inner peripheral surface of the head 111 and the outer peripheral surface of the fastening stopper 140 may be formed with a corresponding thread Can be.

On the other hand, as shown in the accompanying drawings in the present embodiment, the head portion 111 of the spinal fixing screw 110 has a structure that is integrally formed with the screw body portion 112, otherwise the head portion 111 May be coupled to the screw body 112 to enable position adjustment with respect to the screw body 112. Specifically, the head 111 may be separately manufactured and then coupled to the screw body 112 by a hinge method such as to move within a 15 ° range with respect to the screw body 112. Accordingly, the head portion 111 of the spinal fixation screw 110 is positioned substantially perpendicular to the rod R by adjusting the position of the screw body portion 112 according to the insertion direction of the rod R. Since the rod (R) can be fastened to, the rod (R) after fastening is not only firmly fixed but also to receive a large force.

The screw insertion tube 120 provides a conduit for transporting the spinal fixation screw 110 to the position adjacent to the vertebral bone inside the skin from the outside of the patient's skin. Screw insertion tube 120 is a spinal fixing screw 110 is usually inserted through the upper end. At the lower end of the screw insertion tube 120, the head 111 of the inserted spinal fixing screw 110 is located, and a rod through groove 125 through which the rod R penetrates is formed. Through the screw insertion tube 120, instead of dissecting the patient's skin, the operator makes a minimum hole in the patient's skin and inserts the screw insertion tube 120, and then the spinal fixation screw ( By inserting 110, the spinal fixation screw 110 may be fastened to the vertebral bone using a tool such as an electric screwdriver. In addition, in order to fix the rod (R) with respect to the spinal fixing screw 110, the fastening stopper 140 to the head 111 of the spinal fixing screw 110 is also made through the screw insertion pipe (120). Can be. On the other hand, the screw insertion pipe 120 is provided in two in this embodiment, the number of the screw insertion pipe 120 may be appropriately changed to two or more.

Meanwhile, the screw insertion tube 120 may be supported by the support frame 150 as shown in FIGS. 6 and 7. Here, the support frame 150 is long in the horizontal direction intersecting the screw insertion tube 120 in a bar shape in which the groove 151 is formed along the longitudinal direction. Specifically, the screw insertion tube 120 is coupled to the support frame 150 through the coupling block 155, the first adjustment screw 155a and the second adjustment screw 155b as shown in Figs. Can be. In other words, the minimally invasive surgical device 100 for spinal fixation includes a support frame 150 for supporting the screw insertion tube 120 and a coupling block as a means for coupling the screw insertion tube 120 to the support frame 150. 155, the first adjusting screw 155a and the second adjusting screw 155b may be further included. At this time, the screw insertion tube 120 is fixed by the first adjusting screw 155a in a state where the upper end is coupled to the coupling block 155, the coupling block 155 is in a state that the support frame 150 penetrates It is fixed with respect to the support frame 150 by the 2nd adjustment screw 155b. Due to this coupling structure, the screw insertion tube 120 is capable of adjusting the angle within a predetermined range by loosening and retightening the first adjusting screw 155a, and unwinding and retightening the second adjusting screw 155b. Through this, position adjustment is possible along the longitudinal direction of the support frame 150. However, the coupling structure of the screw insertion tube 120 and the support frame 150 is not limited to that disclosed in this embodiment can be variously changed.

6 and 7, the sleeve tube 130 may be inserted through the upper end of the screw insertion tube 120 and accommodated in the screw insertion tube 120. And the sleeve tube 130 is a screw insertion tube 120, as shown in Figure 8 so that the rod (R) located in the rod seating groove 113 is lifted up in the procedure so as not to be separated from the rod seating groove 113 It may include a sleeve 135 to cover at least a portion of the open upper side of the rod seating groove 113 of the spinal fixing screw 110 in the state accommodated therein.

In this case, the sleeve 135 is preferably configured to extend inward from the lower end 131a of the side wall 131 of the sleeve tube 130 to cover the edge region of the rod seating groove 113 of the spinal fixation screw 110. Do. For example, the sleeve 135 may be formed as an annular step bent extending from the lower end portion 131a of the side wall of the sleeve tube 130. This configuration of the sleeve 135 disclosed in this embodiment is fixed to the spine to fix the rod (R) with respect to the spinal fixing screw 110 even when the sleeve tube 130 is accommodated inside the screw insertion tube (120). This is to enable the operation of fastening the fastening stopper 140 to the head 111 of the screw 110. In other words, as described above, the screw insertion pipe 120 provides a conduit for transporting the fastening stopper 140 as well as the spinal fixing screw 110. In this embodiment, only the edge region of the rod seating groove 113 is provided. By forming the sleeve 135 on the side wall lower end portion 131a of the sleeve tube 130 to cover, the sleeve 135 of the sleeve tube 130 does not interfere with the transfer path of the fastening stopper 140.

However, the sleeve 135 formed in the sleeve tube 130 is not limited to the structure and shape disclosed in this embodiment may be appropriately changed. Furthermore, unlike the present embodiment in which the sleeve 135 is integrally formed with the side wall 131 of the sleeve tube 130, the sleeve 135 may be separately manufactured and then assembled with the side wall 131 of the sleeve tube 130. It may be.

On the other hand, the sleeve tube 130 is two screw insertion tube 120 to stably hold the position of the rod (R) without disturbing the transfer path of the rod (R) by a rod inserter (not shown) ), The rod R is preferably accommodated in the screw insertion tube 120 which is approached first, ie, the screw insertion tube 120 disposed on the left side in FIGS. 6 and 7. Alternatively, the sleeve tube 130 may be accommodated in the screw insertion tube 120 disposed on the right side in FIGS. 6 and 7, or may be further provided in both screw insertion tubes 120.

Sleeve tube 130 having such a configuration can prevent the rod (R) located in the rod seating groove 113 of the spinal fixing screw 110 is separated from the rod seating groove 113 during the procedure. At this time, the 'procedure process' is specifically inserted into the head (111) of the spinal fixing screw 110 by inserting the rod (R) fastening stopper 140 to the head 111 of the spinal fixing screw 110 By fastening) may mean a work up to fix the rod (R) for the spinal fixing screw (110).

Accordingly, the minimally invasive surgical device 100 for spinal fixation according to the present embodiment has a rod R positioned in the rod seating groove 113 of the spinal screw 110 lifted over the rod seating groove 113 during the procedure. It is possible to improve the convenience and safety of the procedure by ultimately solving the inconvenience of having to move it back to the position of the rod seating groove 113 and thereby causing damage to the soft tissue of the patient.

6 and 7, the minimally invasive surgical device 100 for spinal fixation according to the present embodiment may further include a position fixing means 160. The position fixing means 160 is a means for positioning the sleeve tube 130 with respect to the screw insertion tube 120 while the sleeve tube 130 is accommodated in the screw insertion tube 120. The upper and lower positions of the sleeve tube 130 may be fixed to the inside of the screw insertion tube 120 by). As such, the upper and lower positions of the sleeve tube 130 are fixed, so that the rod R lifting up the rod seating groove 113 can be stably prevented by the sleeve 135 of the sleeve tube 130.

Specifically, the position fixing means 160 has a fixing protrusion 161 and protruding outwardly formed from the side wall 131 of the sleeve tube 130, as shown in Figure 6 and 7, the fixing protrusion 161 and It may be provided to the fixing groove 163 is formed in the side wall 121 of the screw insertion tube 120 to engage and position the sleeve tube 130. At this time, the fixing protrusion 161 is formed in a pair of right and left on the side wall upper end portion 131b of the sleeve tube 130, the fixing groove 163 is a 'b' shape of the side wall 121 of the screw insertion tube 120. It can be formed in a pair on the left and right. With this configuration, the operator inserts the sleeve tube 130 into the screw insertion tube 120 at the position where the fixing protrusion 161 corresponds to the fixing groove 163 without using a separate tool or tool. As shown in FIG. 7, the simple operation of rotating the sleeve tube 130 at a predetermined angle may fix the position of the sleeve tube 130 with respect to the screw insertion tube 120. However, in the present invention, the means for fixing the position of the sleeve tube 130 is not limited to the position fixing means 160 disclosed in this embodiment can be changed to other various structures, of course.

Hereinafter, the minimally invasive surgical device for fixation of a spine according to another embodiment of the present invention will be described with reference to FIGS. 9 to 11.

FIG. 9 is a perspective view illustrating a minimally invasive surgical device for spinal fixation according to another embodiment of the present invention, FIG. 10 is a schematic partial cross-sectional view for explaining a sleeve provided in the spinal fixation screw of FIG. 9, and FIG. 10 is a schematic partial cross-sectional view showing a state in which the fastening stopper is fastened to the spinal fixation screw.

9 to 11, the minimally invasive surgical device 200 for spinal fixation according to the present embodiment may include a spinal fixation screw 210, a screw insertion tube 120, and a fastening stopper 240. . In addition, the minimally invasive surgical device 200 for spinal fixation may further include a support frame 150, a coupling block 155, a first adjustment screw 155a, and a second adjustment screw 155b.

On the other hand, in the present embodiment, except for the configuration of the spinal fixing screw 210 and the fastening stopper 240 is substantially the same as the configuration described in the above embodiment, the same reference numerals are given to the same configuration, The description thereof will apply mutatis mutandis to the above-described embodiment.

Spinal fixing screw 210, as shown in the above-described embodiment as shown in Figure 9 includes a head portion 211 and a screw body portion 212 is formed on the outer peripheral surface to be fastened to the vertebral bone, head portion 211 ) May have a rod seating groove 213 having an open top structure. On the other hand, as shown in the accompanying drawings in the present embodiment, the head portion 211 of the spinal fixing screw 210 has a structure formed integrally with the screw body portion 212, otherwise the head portion 211 May be coupled to the screw body portion 212 to allow position adjustment with respect to the screw body portion 212.

Here, the head portion 211 is opened in the rod seating groove 213 so that the rod (R) located in the rod seating groove 213 is not separated from the rod seating groove 213 as shown in FIGS. 9 and 10. A sleeve 215 may be provided to cover at least a portion of the upper portion. In other words, the sleeve 215 of the present embodiment may be provided as part of the spinal fixation screw 210, unlike the above-described embodiment provided in the form of a separate sleeve tube.

In this case, the sleeve 215 is preferably configured to extend inward from the upper end of the side wall of the head portion 211 to cover the edge region of the rod seating groove 213. For example, the sleeve 215 may be formed as a step extending from the upper end of the side wall of the head 211. The configuration of the sleeve 215 disclosed in the present embodiment prevents the rod R located in the rod seating groove 213 from being lifted over the rod seating groove 213 during the procedure, while the rod R is lifted. In order to be able to work to fasten the fastening stopper 240 to the spinal fixing screw 210 to fix the spinal fixing screw (210). In other words, if the sleeve 215 is configured to cover or cover the central area of the rod seating groove 213, the rod R located in the rod seating groove 213 is released from the rod seating groove 213. This can be prevented because it is difficult to fasten the fastening stopper 240 to the spinal fixation screw 210.

However, the sleeve 215 is provided on the spinal fixing screw 210 is not limited to the structure and shape disclosed in this embodiment can be changed appropriately. Further, unlike the present embodiment in which the sleeve 215 is integrally formed with the head portion 211, the sleeve 215 may be provided in a structure that is separately manufactured and then assembled with the head portion 211.

Fastening stopper 240 is for fixing the rod (R) located in the rod seating groove 213 in combination with the head portion 211 of the spinal fixing screw 210, as in the above-described embodiment, but in the present embodiment Since the sleeve 215 is provided in the head portion 211 of the fixing screw 210, it is necessary to have a structure and shape different from the fastening stopper 140 of the above-described embodiment.

Specifically, the fastening stopper 240 is fastened to the fastening portion 241 and the fastening portion 241 is screwed with the sleeve 215 provided in the spinal fixing screw 210, as shown in Figure 9 and 11, the downward direction in the fastening portion 241 It may include a protruding portion 243 extending in contact to press the rod (R). To this end, threads are formed on the inner circumferential surface of the sleeve 215 and the outer circumferential surface of the fastening portion 241, and the protrusion 243 has a smaller diameter than the fastening portion 241 so as to pass through the sleeve 215. . By such a configuration, the fastening stopper 240 may stably fix the rod R with respect to the spinal fixation screw 210 provided with the sleeve 215.

As described above, the minimally invasive surgical device 200 for spinal fixation according to the present embodiment has a sleeve 215 covering at least a portion of the open upper side of the rod seating groove 213 at the head portion 211 of the spinal fixation screw 210. ), The rod (R) located in the rod seating groove 213 of the spinal fixation screw 210 is lifted over the rod seating groove 213 during the procedure, and moved to the position of the rod seating groove 213 again. By solving the inconvenience of having to be damaged and the soft tissues of the patient due to this, it can ultimately improve the convenience and safety of the procedure.

It is apparent to those skilled in the art that the present invention is not limited to the above-described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

The present invention can be used in the spinal fixation surgical apparatus used in the minimally invasive surgery (Minimally Invasive Surgery).

Claims

Spinal fixing screw having a head portion formed with a rod seating groove;

Two or more screw insertion tubes for guiding the spinal fixation screw to the spinal bone of the patient; And

A sleeve which is accommodated in at least one of the at least one screw insertion tube and covers at least a portion of an open upper side of the rod seating groove so that the rod positioned in the rod seating groove is not separated from the rod seating groove. Spinal fixation minimally invasive surgical apparatus comprising a sleeve tube having.
The method of claim 1,

The sleeve,

The minimally invasive surgical device for spinal fixation, characterized in that extending in the inward direction from the lower end of the side wall of the sleeve tube to cover the edge area of the rod seating groove.
The method of claim 2,

The sleeve is formed of an annular step bent extending from the lower end of the side wall of the sleeve tube,

The head portion, the minimally invasive surgical device for spinal fixation, characterized in that coupled to the screw body portion to enable position adjustment with respect to the screw body portion of the spinal fixation screw.
The method of claim 1,

The sleeve tube,

The minimally invasive surgical device for spinal fixation, characterized in that the rod of the at least two screw insertion tube is accommodated in the first screw insertion tube.
The method of claim 1,

And a position fixing means for positioning the sleeve tube with respect to the screw insertion tube in a state where the sleeve tube is accommodated inside the screw insertion tube.
The method of claim 5,

The position fixing means,

A fixing protrusion protruding outward from the side wall of the sleeve tube; And

And a fixing groove formed in the side wall of the screw insertion tube to engage the fixing protrusion to fix the sleeve tube.
Spinal fixing screw having a head portion formed with a rod seating groove; And

At least two screw insertion tube for guiding the spinal fixation screw to the spinal bone of the patient,

In the head portion,

The minimally invasive surgical device for spinal fixation, characterized in that the sleeve is provided to cover at least a portion of the open upper side of the rod seating groove so that the rod located in the rod seating groove is not separated from the rod seating groove.
The method of claim 7, wherein

The sleeve,

The minimally invasive surgical device for spinal fixation extending inward from the upper end of the side wall of the head to cover the edge region of the rod seating groove.
The method of claim 8,

The sleeve is formed as a step extending from the upper end of the side wall of the head portion,

The head portion, the minimally invasive surgical device for spinal fixation, characterized in that coupled to the screw body portion to enable position adjustment with respect to the screw body portion of the spinal fixation screw.
The method of claim 8,

Further comprising a fastening stopper for coupling the spinal fixing screw to fix the rod located in the rod seating groove,

The fastening stopper,

A fastening part screwed to the sleeve; And

Minimally invasive surgical device for a spine, characterized in that it comprises a protrusion extending in the downward direction from the fastening portion for contact and pressurizing the rod.