CN218943486U - Reduction instrument for spinal surgery - Google Patents

Abstract

The utility model relates to the field of medical equipment, and discloses a resetting device for spinal surgery, which comprises a first telescopic adjusting piece and a second telescopic adjusting piece, wherein a first adjusting rod is movably arranged on the second telescopic assembly, and the first adjusting rod is axially fixed on the second telescopic assembly; the outer wall of the first fixing component is provided with a positioning rod, the outer wall of the positioning rod is movably sleeved with a second adjusting rod, and the first adjusting rod and the second adjusting rod are arranged in parallel and are positioned on the same side of the first fixing component; the ends of the first adjusting rod and the second adjusting rod on the same side are respectively provided with external threads matched with the internal threads of the nuts of the pedicle screws. According to the utility model, after the first adjusting rod, the second adjusting rod and pedicle screws on two vertebrae are fixed, the distance between the first adjusting rod and the second adjusting rod is controlled by controlling the telescopic length of the first adjusting rod, so that the distance between the dislocated vertebrae and the normal vertebrae can be adjusted, the front and back position adjustment of the dislocated vertebrae can be realized, and the dislocated vertebrae can be ensured to be reset to physiological positions.

Description

A kind of reduction instrument for spinal surgery

technical field

The utility model relates to the field of medical equipment, in particular to a reset instrument for spinal surgery.

Background technique

During spinal surgery, deformities are corrected by implanting pedicle screws or pedicle hooks to support bone or other tissue and hold the tissue in place. Pedicle screws are fixed to the vertebrae during surgery and connected with connecting members (bone plate/rod) to support or maintain the joints in the correct position.

Usually, before bone fixation and pedicle screw fixation, it is necessary to use reduction instruments to reset the dislocated or abnormally curved spinal segments in advance; Between two abnormal adjacent spines, the dislocated or abnormally curved spine is pulled by hand to reset. The reset device of this structure requires manual pulling by medical staff, which is not only inconvenient to apply force, but also difficult to judge the amount of pulling; and The existing stretching apparatus can only realize one-way adjustment between the vertebrae, such as the distance between the vertebrae; it cannot realize front-back adjustment and distance adjustment at the same time.

Utility model content

Based on the above problems, the utility model provides a reset instrument for spinal surgery, which can not only realize the adjustment of the distance between the dislocated spine and the normal spine, but also realize the adjustment of the front and rear positions of the dislocated spine.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A reset instrument for spinal surgery, comprising a telescopic adjustment part 1, the telescopic adjustment part 1 includes a fixed assembly 1 and a telescopic assembly 1 arranged in cooperation; the telescopic assembly 1 is equipped with a telescopic adjustment part 2, and the telescopic adjustment part 2 includes The fixed component 2 and the telescopic component 2, the telescopic component 2 is movably installed with the adjusting rod 1, the adjusting rod 1 is axially fixed on the telescopic component 2, the adjusting rod 1 is provided with a rotating handle, which is used to rotate the adjusting rod 1 along the circumferential direction The outer wall of the fixed component 1 is provided with a positioning rod, and the outer wall movable sleeve of the positioning rod is provided with an adjusting rod 2, and the adjusting rod 2 is perpendicular to the telescopic direction of the telescopic component 1; , the adjustment rod 2 is provided with a groove that cooperates with the limit block; the adjustment rod 1 and the adjustment rod 2 are arranged in parallel and are located on the same side of the fixed component 1; the ends of the adjustment rod 1 and the same side of the adjustment rod 2 are provided with The internal thread of the nut of the pedicle screw mates with the external thread.

Further, the fixed assembly of the telescopic adjusting member 1 includes a telescopic tube and an adjusting bolt, and the telescopic component 1 includes a telescopic rod. There is a guide groove on the axis, and the outer wall of the telescopic rod is provided with a guide block that matches the guide groove; the end of the telescopic rod inserted into the telescopic tube is provided with a threaded hole along the axial direction, and one end of the adjusting bolt extends into the telescopic tube and fits into the threaded hole The other end of the adjusting bolt is located outside the telescopic cylinder; the inner wall of the telescopic cylinder is provided with an inwardly protruding necking section 1 at the position corresponding to the adjusting screw, and the outer wall of the adjusting screw is provided with a limiter that matches the necking section 1 along the circumference. slot one.

Further, the fixed assembly 2 of the telescopic adjustment member 2 includes a sleeve installed on the telescopic assembly 1, and the telescopic assembly 2 includes an inner cylinder, which is movably installed in the sleeve through threads, and both ends of the inner cylinder are located outside the sleeve .

Further, the adjustment rod one is inserted in the inner cylinder, and both ends of the adjustment rod one are located outside the inner cylinder; the inner wall of the inner cylinder is provided with an inwardly protruding neck section two at the position corresponding to the adjustment rod one, and the adjustment rod one The outer wall is provided with a limiting groove 2 which cooperates with the necking section along the circumference.

Further, the adjusting lever 2 is provided with an adjusting handle which can rotate the adjusting lever 2 along the circumferential direction.

Compared with the prior art, the beneficial effect of the utility model is: after the utility model fixes the adjusting rod one, the adjusting rod two and the pedicle screws on the two vertebrae, by controlling the telescopic length of the adjusting rod one, and controlling The distance between the adjusting rod 1 and the adjusting rod 2 can not only realize the adjustment of the distance between the misaligned spine and the normal spine, but also realize the adjustment of the front and rear positions of the misaligned spine, which can ensure the reset of the misaligned spine to its physiological position.

Description of drawings

Fig. 1 is a structural schematic diagram of a spinal surgery reset instrument in an embodiment;

Fig. 2 is a perspective view of the reduction instrument for spinal surgery without the inner cylinder and the second adjustment rod in the embodiment;

Among them: 1. Adjusting rod one; 2. Rotating handle; 3. Positioning rod; 4. Limit block; 5. Groove; 6. Telescopic tube; 7. Adjusting bolt; 8. Guide slot; 9. Guide block; 10 1, threaded hole; 11, adjusting rod two; 12, necking section one; 13, limiting groove one; 14, necking section two; 15, limiting groove two; 16, adjusting handle; 17, pedicle screw; 18, sleeve; 19, inner tube.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the examples and accompanying drawings. The schematic implementation of the utility model and its description are only used to explain the utility model Novelty, not as a limitation to the utility model.

Example:

Referring to Fig. 1 and Fig. 2, a kind of reset device for spinal surgery includes a telescopic adjustment part 1, and the telescopic adjustment part 1 includes a fixed assembly 1 and a telescopic assembly 1 arranged in cooperation; The adjusting part 2 includes a fixed component 2 and a telescopic component 2 which are arranged in cooperation. An adjusting rod 1 is movably installed on the telescopic component 2. The adjusting rod 1 is axially fixed on the telescopic component 2. A rotating handle is arranged on the adjusting rod 1. 2. It is used to rotate the adjusting rod one 1 in the circumferential direction; the outer wall of the fixed component one is provided with a positioning rod 3, and the outer wall of the positioning rod 3 is movable with an adjusting rod two 11, and the telescopic adjustment rod two 11 is connected with the telescopic component one. The direction is vertical; the end of positioning rod 3 is provided with a limit block 4 whose diameter is greater than that of the positioning rod 3, and the adjustment rod two 11 is provided with a groove 5 cooperating with the limit block 4; adjustment rod one 1 and adjustment rod two 11 are parallel It is set and located on the same side of the fixing component one; the ends of the adjustment rod one 1 and the adjustment rod two 11 on the same side are both provided with external threads that cooperate with the internal threads of the nuts of the pedicle screws 17 .

In this embodiment, the adjusting rod 1 and the adjusting rod 11 are arranged in parallel on the same side of the fixed assembly 1, the adjusting rod 11 is perpendicular to the stretching direction of the telescopic assembly 1, and the telescopic adjusting assembly 1 is used to adjust the adjusting rod 1 And the spacing between the adjustment rod two 11. When it is necessary to reset the misaligned spine (here, for the situation where the misalignment is serious and needs surgical intervention to reset), two pedicle screws 17 are installed on the misaligned vertebra and another non-displaced vertebra in advance, and the non-displaced vertebra is used To play the role of limit bearing force; then screw the external thread of the adjustment rod two 11 ends into the nail head thread of the pedicle screw 17; then by controlling the telescopic adjustment part one, the adjustment rod one 1 and the misplaced The pedicle screws 17 on the spine are at the same height, and then the telescopic adjustment part 2 is controlled so that the front end of the adjustment rod 1 is close to the nail head of the pedicle screw 17 on the misaligned spine, and finally the rotation of the adjustment rod 1 is passed. With the handle 2, the front end of the adjusting rod-1 is screwed into the screw head thread of the pedicle screw 17 of the misaligned vertebra through the external thread. At this time, the distance between the two vertebrae can be adjusted by adjusting the telescopic adjustment part 1 again. By adjusting the telescopic adjustment part 2 again, the back-and-forth adjustment of the dislocated spine can be realized. Finally, after the dislocated vertebra reaches the physiological position, the two pedicle screws Fixing rods are applied between 17 to realize the reset of the dislocated spine, and the pulling amount can be determined by the number of rotations of the rotating handle 2, which is easy to precisely control the reset. Afterwards, respectively reversely rotate the adjusting rod one 1 and the adjusting rod two 11 to separate the adjusting rod one 1 and the second 11 from the corresponding pedicle screw 17, and finally apply The limit bolt can fix the fixing rod and the two pedicle screws 17 into an integral structure.

In this embodiment, the fixed assembly of the telescopic adjusting member 1 includes a telescopic cylinder 6 and an adjusting bolt 7. The telescopic assembly 1 includes a telescopic rod, and the two ends of the telescopic cylinder 6 are open. 6 outside; the inner wall of the telescopic cylinder 6 is provided with a guide groove 8 along the axis, and the outer wall of the telescopic rod is provided with a guide block 9 cooperating with the guide groove 8; the end of the telescopic rod inserted into the telescopic cylinder 6 is provided with a threaded hole 10 along the axial direction, One end of the adjustment bolt 7 extends into the telescopic cylinder 6 and is connected with the threaded hole 10, and the other end of the adjustment bolt 7 extends out of the telescopic cylinder 6; the inner wall of the telescopic cylinder 6 is provided with an inwardly protruding The necking section one 12, the outer wall of the adjusting bolt 7 is provided with a limiting groove one 13 matched with the necking section one 12 along the circumferential direction. The necking section-12 cooperates with the limit groove-13, which can ensure that the adjustment bolt 7 and the telescopic cylinder 6 can be relatively fixed, and under the interaction of the guide groove 8 and the guide block 9, the rotation of the adjustment bolt 7 can drive The telescopic rod one is telescopic, thereby realizing the adjustment of the distance between the adjusting rod one 1 and the adjusting rod two 11 .

In this embodiment, the fixed assembly 2 of the telescopic adjustment member 2 includes a sleeve 18 installed on the telescopic assembly 1, and the telescopic assembly 2 includes an inner cylinder 19, which is installed in the sleeve 18 through thread movement, and the two inner cylinders 19 Both ends are located on the outside of the sleeve 18. By rotating the inner cylinder 19, the adjustment of the distance between the adjusting rod-1 and the vertebra (or the pedicle screw 17 applied in the misaligned vertebra) can be realized.

In this embodiment, the adjustment rod-1 is inserted in the inner cylinder 19, and both ends of the adjustment rod-1 are located outside the inner cylinder 19; Neck section 2 14 and the outer wall of adjustment rod 1 are provided with limiting groove 2 15 matched with the necking section along the circumference. Through the cooperation of the necking section 2 14 and the limiting groove 15, it can be ensured that when the adjusting rod 1 is rotated, there will be no relative displacement between the adjusting rod 1 and the inner cylinder 19, which can ensure the reset of the dislocated spine.

It should be noted that the telescopic adjustment part 1 is a mechanism that can realize the distance adjustment between the adjustment rod 1 and the adjustment rod 2 11, such as a telescopic rod, etc.; the telescopic adjustment part 2 can adjust the distance between the adjustment rod 1 and the spine mechanism. Any telescopic adjustment mechanism that can realize the above functions is also applicable to the present invention.

The adjusting lever 11 in this embodiment is provided with an adjusting handle 16 that can rotate the adjusting lever 11 along the circumferential direction, which is convenient for medical personnel to rotate the adjusting lever 11, saving time and effort.

In this embodiment, the telescopic cylinder 6, the sleeve 18 and the adjusting rod 11 are assembled into an integral structure with a limit mechanism in the form of a half ring + screw at the installation position of the internal rotating assembly.

The above is the embodiment of the present utility model. The above-mentioned embodiments and the specific parameters in the embodiments are only for clearly expressing the verification process of the utility model, and are not used to limit the scope of protection of the patent of the utility model. The scope of protection of the patent of the utility model is still subject to its claims. The equivalent structural changes made in the specification and accompanying drawings of the utility model should be included in the protection scope of the utility model in the same way.

Claims (5)

1. A reset instrument for spinal surgery, characterized in that: it comprises a telescopic adjustment part 1, and the telescopic adjustment part 1 includes a fixed assembly 1 and a telescopic assembly 1 arranged in cooperation; the telescopic adjustment part 1 is installed on the telescopic assembly 1 2. The telescopic adjustment member 2 includes a fixed assembly 2 and a telescopic assembly 2 arranged in cooperation. An adjustment rod 1 (1) is movably installed on the telescopic assembly 2, and the adjustment rod 1 (1) is axially fixed on the telescopic On the second component, the adjusting rod one (1) is provided with a rotating handle (2) for rotating the adjusting rod one (1) in the circumferential direction; the outer wall of the fixed component one is provided with a positioning rod (3), so The outer wall movable sleeve of the positioning rod (3) is provided with two adjustment rods (11), and the two adjustment rods (11) are perpendicular to the telescopic direction of the telescopic assembly one; the end of the positioning rod (3) is provided with a diameter greater than The stop block (4) of the positioning rod (3), the groove (5) cooperating with the stop block (4) is provided in the said adjustment rod two (11); the said adjustment rod one (1) and the said adjustment rod one (1) Adjusting rod two (11) are arranged in parallel and are positioned at the same side of fixing assembly one; The ends of the same side of the adjusting rod one (1) and the adjusting rod two (11) are all provided with pedicle screws (17) The internal thread of the nut matches the external thread. 2. A spinal surgery reset instrument according to claim 1, characterized in that: the fixed assembly of the first telescopic adjustment member includes a telescopic tube (6) and an adjustment bolt (7), and the first telescopic assembly includes a telescopic Rod, the two ends of the telescopic tube (6) are open, one end of the telescopic rod is inserted into the telescopic tube (6), and the other end is located outside the telescopic tube (6); the inner wall of the telescopic tube (6) is provided with guides along the axis Groove (8), the outer wall of the telescopic rod is provided with a guide block (9) that cooperates with the guide groove (8); the end of the telescopic rod inserted into the telescopic tube (6) is provided with a threaded hole (10) in the axial direction, One end of the adjusting bolt (7) extends into the telescopic tube (6) and is connected with the threaded hole (10), and the other end of the adjusting bolt (7) stretches out of the telescopic tube (6); the telescopic tube ( 6) The inner wall is provided with an inwardly protruding necking section 1 (12) at the position corresponding to the adjusting bolt (7), and the outer wall of the adjusting bolt (7) is provided with a necking section 1 (12) along the circumference. Limiting groove one (13). 3. A spinal surgery reset instrument according to claim 1, characterized in that: the second fixed assembly of the telescopic adjustment member 2 includes a sleeve (18) installed on the telescopic assembly 1, and the telescopic assembly 2 It includes an inner cylinder (19), the inner cylinder (19) is movably installed in the sleeve (18) through threads, and both ends of the inner cylinder (19) are located outside the sleeve (18). 4. A spinal surgery reset instrument according to claim 3, characterized in that: said adjusting rod one (1) is inserted in the inner cylinder (19), and the two ends of said adjusting rod one (1) They are all located on the outside of the inner cylinder (19); the inner wall of the inner cylinder (19) is provided with an inwardly protruding neck section two (14) at the position corresponding to the adjustment rod one (1), and the adjustment rod one (1) The outer wall is provided with a second limiting groove (15) matching with the necking section along the circumference. 5. A kind of spinal surgery resetting instrument according to any one of claims 1-4, characterized in that: said adjusting rod 2 (11) is provided with an adjustment device capable of rotating the adjusting rod 2 (11) in the circumferential direction. handle (16).

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