CN214104577U

CN214104577U - Spinal surgery connecting rod

Info

Publication number: CN214104577U
Application number: CN202022982558.8U
Authority: CN
Inventors: 格日勒
Original assignee: Peking University International Hospital
Current assignee: Peking University International Hospital
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-09-03
Anticipated expiration: 2030-12-11

Abstract

The utility model relates to a spinal column operation connective bar, belong to backbone surgery medical instrument technical field, the length to the connective bar who acquires is not accurate, need relapse multiple measurements, it provides following technical scheme to increase doctor's work load problem, the technical essential of this application comprises a plurality of linkage segments, the direction of arranging of pedicle of vertebral arch nail is followed to a plurality of linkage segments sets up, be provided with the concatenation subassembly between the adjacent linkage segment, adjacent linkage segment passes through concatenation subassembly fixed connection, the concatenation subassembly includes first connective column and second spliced pole and can restrict the dead lever of first connective column and second connective column position, dead lever and linkage segment set up perpendicularly, first connective column and one of them connective segment can be dismantled and connect, the connection can be dismantled to second connective column and another connective segment. This application has the length of disposable definite connective rod and the shape of connective rod, makes the length of connective rod and the advantage of the distance adaptation between the both ends pedicle of vertebral arch nail.

Description

Spinal surgery connecting rod

Technical Field

The application relates to the technical field of medical instruments for spinal surgery, in particular to a spinal surgery connecting rod.

Background

The implant is clinically used for fixing the posterior thoracolumbar spine, and mainly adopts a nail-rod system. The screw rod system comprises a pedicle screw, a screw plug and a connecting rod, the connecting rod is arranged in a U-shaped groove of the pedicle screw, and the screw plug is locked relative to the pedicle screw, so that the screw plug extrudes the connecting rod to the bottom of the U-shaped groove to complete the relative fixation of the pedicle screw and the connecting rod.

The length of the connecting rod needs to be determined when a doctor makes a surgical plan, and the existing method for selecting the length of the connecting rod is as follows: sequentially connecting a section of longer connecting rod with a plurality of pedicle screws, clamping the connecting rod by using clamping pincers respectively at the outer sides of the pedicle screws at two ends, taking the connecting rod down from the pedicle screws, marking two positions where the clamping pincers clamp the connecting rod, obtaining the initial length of the connecting rod, and then cutting the connecting rod to obtain the connecting rod; after connecting the connector rod with the pedicle screws, further processing may be required at both ends of the connector rod to further reduce the length of the connector rod.

The existing method is complex to operate, the obtained length of the connecting rod is not accurate, repeated measurement is needed, and the workload of doctors is increased.

SUMMERY OF THE UTILITY MODEL

For the length of disposable definite connective rod and the shape of connective rod, make the length of connective rod and the distance adaptation between the both ends pedicle of vertebral arch nail, this application provides a spinal surgery connective rod, adopts following technical means:

the utility model provides a spinal column operation connective bar comprises a plurality of linkage segments, and is a plurality of the linkage segment sets up along the orientation of arranging of pedicle of vertebral arch nail, and is adjacent be provided with the concatenation subassembly between the linkage segment, and is adjacent the linkage segment passes through concatenation subassembly fixed connection, the concatenation subassembly includes first spliced pole and second spliced pole and can restrict the dead lever of first spliced pole and second spliced pole position, dead lever and linkage segment set up perpendicularly, first spliced pole and one of them linkage segment can dismantle the connection, the connection can be dismantled to second spliced pole and another linkage segment.

Through adopting above-mentioned technical scheme, during the use, go into patient's centrum with pedicle of vertebral arch nail, the length of the required connective bar of preliminary estimation earlier, then select the linkage segment of certain number, splice a plurality of linkage segments along the direction concatenation of arranging of pedicle of vertebral arch nail and constitute the connective bar main part, then carry out certain degree buckling with the connective bar main part, connective bar main part and pedicle of vertebral arch nail after will splicing are connected, then relieve the connection between the first connective bar of connective bar main part both sides and the linkage segment respectively, connection between second connective bar and the linkage segment, keep the roughness at connective bar main part both ends, realize the length of disposable definite connective bar and the shape of connective bar, make the length of connective bar and the distance adaptation between the pedicle of vertebral arch nail of both ends, need not to connect connective bar and pedicle of vertebral arch nail repeatedly.

Optionally, the first connection column is arranged along the axis direction of the connection section, the first connection column is fixedly provided with a first insertion block, the second connection column is correspondingly provided with an insertion groove for the first insertion block to insert, the first insertion block is provided with a fixing hole along the radial direction of the first insertion block, the second connection column is provided with a positioning hole, the end of the fixing rod penetrates through the positioning hole and then is inserted into the fixing hole, and the outer diameter of the fixing rod is larger than the outer diameter of the positioning hole.

Through adopting above-mentioned technical scheme, peg graft in the inside of inserting groove with first grafting piece, then insert the inside of fixed orifices with the dead lever, because dead lever and linkage segment are perpendicular, realize the position restriction to first grafting piece, because the external diameter of dead lever is greater than the external diameter of locating hole for can interference fit between dead lever and the linkage segment, realize fixed connection between the adjacent linkage segment.

Optionally, the second connecting column is fixedly provided with a second inserting block, and the first connecting column is correspondingly provided with a limiting groove for inserting the second inserting block.

Through adopting above-mentioned technical scheme, when first grafting piece is pegged graft in the inside of inserting groove, the second grafting piece can be pegged graft in the inside of spacing groove, further improves the joint strength between the adjacent linkage segment.

Optionally, the first connecting column has been seted up first groove of stepping down along its axis direction, the second connecting column has been seted up the second groove of stepping down along its axis direction, first groove of stepping down and second groove of stepping down set up relatively, the dead lever sets up between first groove of stepping down and the second groove of stepping down.

Through adopting above-mentioned technical scheme, be convenient for realize the overlap joint between first spliced pole and the second spliced pole, convenient operation.

Optionally, first spliced pole and second spliced pole all set firmly the installation piece, the linkage segment is seted up and is supplied installation piece male mounting groove, the linkage segment is provided with the setting element that can prevent the installation piece from deviating from.

Through adopting above-mentioned technical scheme, be convenient for realize installing the dismantlement connection between piece and the linkage segment, be convenient for realize the first spliced pole or the removal of second spliced pole near both ends pedicle of vertebral arch nail linkage segment, be convenient for keep the roughness at connective bar both ends.

Optionally, the positioning piece is a positioning screw, the connecting section is provided with a threaded hole, the threaded hole is communicated with the mounting groove, and the positioning screw penetrates through the threaded hole and is in threaded connection with the mounting block.

Through adopting above-mentioned technical scheme, be convenient for realize installing the dismantlement between piece and the linkage segment and be connected convenient operation. Meanwhile, the mounting block is fixed in position through the positioning screws, and the limiting strength of the mounting block is improved.

Optionally, the connecting section has seted up in the edge of screw hole and has stepped down the annular, set screw's head is spacing in the inside of the annular of stepping down.

Through adopting above-mentioned technical scheme, be convenient for keep the roughness on connecting section surface.

Optionally, the connecting section includes two rigid sections and a flexible section, the flexible section is disposed between the two rigid sections, and the flexible section and the rigid section are fixedly connected.

Through adopting above-mentioned technical scheme, through setting up flexible section, be convenient for realize buckling to the linkage segment.

Optionally, the flexible section is a cylindrical spring, and an outer diameter of the cylindrical spring is smaller than or equal to an outer diameter of the rigid section.

By adopting the technical scheme, the moving range of the rigid section can be enlarged, so that the connecting section can be adapted to the clinical requirement.

Optionally, the cylindrical spring is formed by winding a metal wire with high elasticity.

By adopting the technical scheme, the axial flexibility of the flexible section can be enhanced by adjusting the wire diameter of the metal wire for winding the cylindrical spring and the height and the number of turns of the cylindrical spring.

In summary, the present application has the following beneficial effects:

firstly, splicing a plurality of connecting sections along the arrangement direction of pedicle screws through a splicing assembly to form a connecting rod main body, and then bending the connecting rod main body to a certain degree to enable the length of the connecting rod to be matched with the distance between the pedicle screws at two ends and the shape of the connecting rod to be matched with the shape of a vertebra, so that the length of the connecting rod and the shape of the connecting rod can be determined at one time, and the length of the connecting rod is matched with the distance between the pedicle screws at two ends;

secondly, the first inserting block is inserted into the inserting groove, meanwhile, the second inserting block can be inserted into the limiting groove, the position of the first inserting block and the position of the second inserting block are limited through interference fit between the fixing rod and the connecting sections, fixed connection between adjacent connecting sections is further achieved, and operation is convenient;

thirdly, through all setting up flexible section on every linkage segment, be convenient for realize the bending of linkage segment, be convenient for buckle the connective bar to with the shape of vertebra looks adaptation, realize the definite to the connective bar shape.

Drawings

FIG. 1 is a schematic view of the overall construction of a spinal surgical connector rod according to an embodiment of the present application;

FIG. 2 is a partial exploded view of a spinal surgical connector rod according to an embodiment of the present application;

FIG. 3 is a top view of FIG. 1;

fig. 4 is a sectional view taken along line a-a in fig. 3.

In the figure, 1, pedicle screws; 2. a connecting section; 21. a rigid section; 211. mounting grooves; 212. a threaded hole; 213. a abdicating ring groove; 214. inserting grooves; 215. a limiting groove; 22. a cylindrical spring; 3. splicing the components; 31. a first connecting column; 311. a first abdicating groove; 312. a fixing hole; 32. a second connecting column; 321. a second abdicating groove; 322. positioning holes; 33. fixing the rod; 41. a first plug-in block; 42. a second insertion block; 51. mounting blocks; 52. and (5) positioning the screw.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Referring to fig. 1, for this application discloses a spinal surgery connective bar, constitute by the concatenation of a plurality of linkage segments 2, a plurality of linkage segments 2 are arranged along the direction of arranging of many pedicle screws 1. The connecting sections 2 are arranged in a cylindrical shape, and the axes of the connecting sections 2 are positioned on the same straight line which is the axis of the connecting rod.

Combine fig. 1 and fig. 2, be provided with concatenation subassembly 3 between the adjacent linkage segment 2, adjacent linkage segment 2 passes through concatenation subassembly 3 fixed connection, through adjusting 2 numbers of linkage segment that constitute the connective bar, can realize the length adjustment to the connective bar. The splicing assembly 3 includes first and second coupling posts 31 and 32 and a fixing bar 33 capable of restricting the positions of the first and second coupling posts 31 and 32.

With reference to fig. 1 and 2, the first connection column 31 is disposed in a cylindrical shape, the axis of the first connection column 31 coincides with the axis of the connection section 2, the outer diameter of the first connection column 31 is equal to the outer diameter of the connection section 2, and the first connection column 31 is disposed along the axis of the connection section 2. The first connecting post 31 has a first receding groove 311 formed in the middle thereof, and the first receding groove 311 is disposed along the axis direction of the first connecting post 31, so that the first connecting post 31 is disposed in a semi-cylindrical shape, and the bottom wall of the first receding groove 311 is a straight surface.

With reference to fig. 1 and 2, one end of the first connecting column 31 is detachably connected to the connecting section 2, and the other end is attached to the end face of the second connecting column 32. A first insertion block 41 is fixedly arranged at the end part of the first connecting column 31, the first insertion block 41 is arranged along the axial direction of the first connecting column 31, and the first insertion block 41 is arranged in a quadrangular shape; the connecting section 2 is correspondingly provided with an inserting groove 214 for inserting the first inserting block 41, the inserting groove 214 is arranged along the axial direction of the connecting section 2, the inserting groove 214 is a rectangular cavity with an opening at one side, and when the straight surface of the first abdicating groove 311 is attached to the straight surface of the second abdicating groove 321, the first inserting block 41 can be embedded in the inserting groove 214.

With reference to fig. 2 and 3, the second connecting column 32 is in a cylindrical shape, the axis of the second connecting column 32 coincides with the axis of the connecting section 2, the second connecting column 32 is arranged along the axis of the connecting section 2, the second connecting column 32 is provided with a second abdicating groove 321 in the middle thereof, and the second abdicating groove 321 is arranged along the axis of the second connecting column 32, so that the second connecting column 32 is in a semi-cylindrical shape, the bottom wall of the second abdicating groove 321 is a straight surface, and the straight surface of the first abdicating groove 311 and the straight surface of the second abdicating groove 321 are parallel and opposite to each other. When the adjacent connecting sections 2 are connected, the straight surface of the first abdicating groove 311 is attached to the straight surface of the second abdicating groove 321, and at the moment, the first connecting column 31 and the second connecting column 32 are mutually overlapped to form a cylinder shape with the same specification as the connecting sections 2.

With reference to fig. 2 and 4, one end of the second connecting column 32 is detachably connected to the connecting section 2, and the other end is attached to the end face of the first connecting column 31. A second insertion block 42 is fixedly arranged at the end part of the second connecting column 32, the second insertion block 42 is arranged along the axial direction of the second connecting column 32, and the second insertion block 42 is arranged in a quadrangular shape; the connecting section 2 is correspondingly provided with a limiting groove 215 for inserting the second insertion block 42, the limiting groove 215 is arranged along the axial direction of the connecting section 2, and the limiting groove 215 and the insertion groove 214 are arranged in a staggered manner up and down along the radial direction of the connecting section 2. The limit groove 215 is a rectangular cavity having one side opened, and when the first insertion block 41 is fitted in the insertion groove 214, the second insertion block 42 is fitted in the limit groove 215.

With reference to fig. 2 and 4, the fixing rod 33 is perpendicular to the connecting section 2, the fixing rod 33 is disposed at the overlapping position of the first connecting column 31 and the second connecting column 32, the fixing rod 33 is disposed in a quadrangular shape, the first connecting column 31 is provided with a fixing hole 312 for the fixing rod 33 to pass through, and the section of the fixing hole 312 is disposed in a rectangular shape; the second connecting column 32 is provided with a positioning hole 322 for the fixing rod 33 to pass through, the aperture of the fixing hole 312 is equal to that of the positioning hole 322, when the straight surface of the first abdicating groove 311 is fitted with the straight surface of the second abdicating groove 321, the center of the fixing hole 312 is coincident with that of the positioning hole 322, and at this time, the end of the fixing rod 33 can be inserted into the fixing hole 312 after passing through the positioning hole 322. The outer diameter of the fixing rod 33 is larger than the outer diameter of the positioning hole 322, so that the fixing rod 33 is joggled with the first connecting column 31 when the fixing rod 33 is inserted into the positioning hole 322 and the fixing hole 312.

With reference to fig. 2 and 4, both ends of the connecting section 2 are detachably connected to the first connecting column 31 and the second connecting column 32 through the mounting blocks 51. Installation piece 51 is the rectangle setting, and installation piece 51 sets up along linkage segment 2's axis direction, and linkage segment 2 has been offered and has been supplied installation piece 51 male mounting groove 211, and mounting groove 211 is for having one side open-ended rectangle die cavity, and installation piece 51 is pegged graft in the inside of mounting groove 211, and linkage segment 2 is provided with the setting element that can prevent installation piece 51 and deviate from mounting groove 211.

With reference to fig. 2 and 4, the positioning element is a positioning screw 52, the connecting section 2 is provided with a threaded hole 212, the threaded hole 212 is communicated with the mounting groove 211, the positioning screw 52 penetrates through the rear of the threaded hole 212 and extends into the mounting groove 211, the positioning screw 52 located in the mounting groove 211 is in threaded connection with the mounting block 51, and the position of the mounting block 51 is limited.

With reference to fig. 2 and 4, the outer wall of the connection section 2 is correspondingly provided with a yielding ring groove 213 for inserting the head of the positioning screw 52, and the yielding ring groove 213 is disposed along the radial direction of the threaded hole 212, so as to maintain the flatness of the outer peripheral surface of the connection section 2.

With reference to fig. 2 and 4, the connection section 2 includes two rigid sections 21 and a flexible section, the flexible section is disposed between the two rigid sections 21, the flexible section is fixedly connected to the rigid sections 21, the flexible section is a cylindrical spring 22, an axis of the cylindrical spring 22 coincides with an axis of the rigid section 21, two ends of the cylindrical spring 22 are respectively fixedly connected to the rigid sections 21, and an outer diameter of the cylindrical spring 22 is smaller than an outer diameter of the rigid section 21. Through adjusting the wire diameter of the metal wire of coiling cylinder type spring 22 and the circle height and the number of turns of cylinder type spring 22, when the circle height of cylinder type spring 22 was greater than the wire diameter, become "dredge the spring" form promptly, under this state, the axial flexibility of flexible section will be strengthened, can be in the time of the linkage segment 2 of being convenient for buckle, guarantee the intensity of linkage segment 2.

The implementation principle of the embodiment is as follows: when in use, the pedicle screw 1 is driven into a vertebral body of a patient, the length of the required connecting rod is preliminarily estimated, a proper number of connecting sections 2 are selected, the connecting sections 2 are spliced along the arrangement direction of the pedicle screw 1, the first connecting column 31 and the second connecting column 32 are fixedly installed on two sides of the rigid section 21 of the connecting section 2 respectively, then the first inserting block 41 is inserted into the inserting groove 214, the second inserting block 42 can be inserted into the limiting groove 215, at the moment, the straight surface of the first abdicating groove 311 is attached to the straight surface of the second abdicating groove 321, the first connecting column 31 and the second connecting column 32 are mutually overlapped to form a cylinder with the same specification as the connecting section 2, then the end part of the fixing rod 33 is inserted into the fixing hole 312 after penetrating through the positioning hole 322, and the fixing rod 33 is tenon-jointed with the first connecting column 31 because the outer diameter of the fixing rod 33 is larger than the outer diameter of the positioning hole 322, and realizing the fixed connection between the adjacent connecting sections 2. Placing the spliced connecting rod into the body of a patient, repeating the steps to add the connecting section 2 if the length of the spliced connecting rod is smaller than the distance between the pedicle screws 1 at two ends, and splicing the connecting section 2 and the connecting rod main body to form the connecting rod, so that the length of the connecting rod is matched with the distance between the pedicle screws 1 at two ends; because all be provided with cylinder type spring 22 on every linkage segment 2, through the line footpath of the wire of regulation coiling cylinder type spring 22 and the circle height and the number of turns of cylinder type spring 22 for every linkage segment 2 all can buckle, realizes the affirmation to the connective bar shape, need not to connect connective bar and pedicle of vertebral arch nail 1 repeatedly, realizes the length of disposable definite connective bar and the shape of connective bar, makes the length of connective bar and the distance adaptation between the pedicle of vertebral arch nail 1 of both ends.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a spinal column operation connective bar, its characterized in that comprises a plurality of linkage segment (2), and is a plurality of linkage segment (2) are along the orientation setting of arranging of pedicle of vertebral arch nail (1), and are adjacent be provided with concatenation subassembly (3) between linkage segment (2), and are adjacent linkage segment (2) are through concatenation subassembly (3) fixed connection, concatenation subassembly (3) include first spliced pole (31) and second spliced pole (32) and can restrict dead lever (33) of first spliced pole (31) and second spliced pole (32) position, dead lever (33) and linkage segment (2) set up perpendicularly, first spliced pole (31) and one of them linkage segment (2) can be dismantled and connect, second spliced pole (32) and another linkage segment (2) can dismantle and connect.

2. The spinal surgery connecting rod as recited in claim 1, wherein the first connecting column (31) is arranged along an axial direction of the connecting section (2), the first connecting column (31) is fixedly provided with a first insertion block (41), the second connecting column (32) is correspondingly provided with an insertion groove (214) for the first insertion block (41) to be inserted into, the first insertion block (41) is provided with a fixing hole (312) along a radial direction thereof, the second connecting column (32) is provided with a positioning hole (322), an end of the fixing rod (33) penetrates through the positioning hole (322) and then is inserted into the fixing hole (312), and an outer diameter of the fixing rod (33) is larger than an outer diameter of the positioning hole (322).

3. The spinal surgery connector rod as recited in claim 2, characterized in that the second connecting column (32) is fixedly provided with a second insertion block (42), and the first connecting column (31) is correspondingly provided with a limiting groove (215) for the second insertion block (42) to be inserted into.

4. The spinal surgery connection rod as claimed in claim 3, wherein the first connection column (31) has a first abdicating groove (311) along the axial direction thereof, the second connection column (32) has a second abdicating groove (321) along the axial direction thereof, the first abdicating groove (311) and the second abdicating groove (321) are oppositely disposed, and the fixing rod (33) is disposed between the first abdicating groove (311) and the second abdicating groove (321).

5. The spinal surgery connecting rod as recited in claim 1, wherein the first connecting column (31) and the second connecting column (32) are both fixedly provided with an installation block (51), the connecting section (2) is provided with an installation groove (211) for the installation block (51) to be inserted into, and the connecting section (2) is provided with a positioning piece capable of preventing the installation block (51) from being separated.

6. The spinal surgery connecting rod as recited in claim 5, characterized in that the positioning element is a positioning screw (52), the connecting section (2) is provided with a threaded hole (212), the threaded hole (212) is communicated with the mounting groove (211), and the positioning screw (52) penetrates through the rear of the threaded hole (212) and is in threaded connection with the mounting block (51).

7. The spinal surgery connecting rod as claimed in claim 6, wherein the connecting section (2) is provided with an abdicating ring groove (213) at the edge of the threaded hole (212), and the head of the positioning screw (52) is limited inside the abdicating ring groove (213).

8. A spinal surgical connector rod according to claim 1, wherein the connecting section (2) comprises two rigid sections (21) and one flexible section, the flexible section being arranged between the two rigid sections (21), the flexible section being fixedly connected to the rigid sections (21).

9. The spinal surgical connector rod according to claim 8, wherein the flexible section is a cylindrical spring (22), and the outer diameter of the cylindrical spring (22) is smaller than or equal to the outer diameter of the rigid section (21).

10. The spinal surgical connecting rod according to claim 9, wherein the cylindrical spring (22) is wound from a wire having high elasticity.