CN209734214U - Spinal fixation system for animals - Google Patents

Abstract

The utility model aims at providing a have elastic spinal column fixing system for animal, including being used for connecting cracked backbone dead lever as an organic whole and being used for the fixed bone nail of treating fixed backbone, the system still includes the connecting seat, and the near-end of bone nail constitutes normal running fit with the connecting seat, and fastening unit fixes the dead lever on the connecting seat, still is provided with the spacing seat of restriction bone nail removal on connecting seat axial direction in the connecting seat inner chamber between the near-end tip of bone nail and the dead lever. In the above scheme, the near-end of bone nail constitutes normal running fit with the connecting seat, under the prerequisite of guaranteeing with cracked backbone fixed connection, can guarantee again to make the rotation of certain angle between the backbone, is favorable to the activity and the recovery of postoperative backbone.

Description

Spinal fixation system for animals

Technical Field

The utility model relates to an animal orthopedics apparatus technical field, concretely relates to backbone fixing system for animal.

Background

The fracture and the correction of the spine are the most common cases of the spine of the small animals, when a vertebral body in the spine is broken, the longitudinal distance of the spine is reduced, so that the intervertebral disc and the adjacent nervous tissues are pressed, and the normal activity of the small animals is seriously influenced. In the spine fixation, a fixing rod is commonly used as an auxiliary fixing device, but because the spine is not in a straight line, all spinal bone segments are usually not parallel, so if the fixing rod in the straight line is directly combined and fixed with a plurality of bone screws implanted into the spinal bone segments to be fixed into a whole, the spinal bone segments to be fixed which are not in a straight line are forced to be in a straight line, all the spinal bone segments to be fixed which are not in the parallel line are enabled to be parallel, and after an operation, the affected part does not have the twisting/stretching function.

Disclosure of Invention

the utility model aims at providing an animal is with spinal fixation system with elasticity.

In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides a backbone fixing system for animal, is including being used for connecting cracked backbone dead lever as an organic whole and being used for fixed bone nail of treating fixed backbone, and the system still includes the connecting seat, and the near-end of bone nail constitutes normal running fit with the connecting seat, and the fastening unit is fixed the dead lever on the connecting seat, still is provided with the spacing seat of restriction bone nail removal on the connecting seat axial direction in the connecting seat inner chamber between the near-end tip of bone nail and the dead lever.

In the above scheme, the near-end of bone nail constitutes normal running fit with the connecting seat, under the prerequisite of guaranteeing with cracked backbone fixed connection, can guarantee again to make the rotation of certain angle between the backbone, is favorable to the activity and the recovery of postoperative backbone.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2 assembled;

FIG. 4 is a cross-sectional view of the spacing block.

Detailed Description

For convenience of description, the definition proximal refers to the end proximal to the operator and distal refers to the end distal to the operator. The present invention is discussed in further detail below in conjunction with fig. 1-4.

Since the fractured spines are slowly produced and reconnected together with the lapse of time after the fractured spines are fixed, the position angle between the fractured spines is changed in the process of slow healing, and the spines are inevitably twisted and stretched during the normal activity of the small animals during the recovery period, so that the fixing member for fixing the spines has certain elasticity to meet the requirement. The utility model relates to a backbone fixing system for animal, including being used for connecting cracked backbone dead lever 10 as an organic whole and being used for the fixed bone nail 20 of treating fixed backbone, the system still includes connecting seat 30, and the near-end of bone nail 20 constitutes normal running fit with connecting seat 30, and fastening unit 40 fixes dead lever 10 on connecting seat 30, still is provided with the spacing seat 50 of restriction bone nail 20 removal on connecting seat 30 axial direction in the connecting seat 30 inner chamber between the near-end tip of bone nail 20 and the dead lever 10. The proximal end of the bone nail 20 and the connecting seat 30 form a running fit, so that the spine can be ensured to rotate at a certain angle on the premise of ensuring the fixed connection of the fractured spine, and the movement and recovery of the spine after the operation are facilitated.

Preferably, the connecting base 30 is integrally barrel-shaped, a through hole 31 for the bone nail 20 to pass through is formed in the center of the barrel bottom, two opposite sides of the barrel wall are cut from the barrel edge to the barrel bottom and the barrel bottom is reserved to form a through clamping groove 32, the length direction of the clamping groove 32 is perpendicular to the shaft core of the connecting base 30, the width of the clamping groove 32 is matched with the diameter of the fixing rod 10, the fixing rod 10 is arranged in the clamping groove 32, and thus the shaft core of the fixing rod 10 is perpendicular to the shaft core of the connecting base 30; the bottom of the slot 32 is an arc shape matched with the outer wall of the fixed rod 10, the inner wall of the barrel wall beside the slot 32 is provided with a limit groove 33, and the limit groove 33 and a limit bulge 51 arranged on the limit seat 50 form a clamping and embedding fit. The stop groove 33 is embedded with the stop protrusion 51 to limit the displacement of the bone screw 20 in the axial direction of the connecting seat 30.

In order to facilitate the assembly, spacing seat 50 wholly is the lantern ring form, spacing arch 51 sets up the tip of keeping away from bone nail 20 one end at the lantern ring, the inner wall that the lantern ring is close to bone nail 20 one side is for the form that coincide with bone nail 20 near-end tip, and the minimum diameter of inner wall is less than the diameter of bone nail 20 near-end tip, just so can carry on spacingly to bone nail 20, spacing seat 50 is provided with the recess 52 that is used for holding dead lever 10 on being close to the outer wall on dead lever 10 one side, the tank bottom of recess 52 is the arc anastomotic with dead lever 10 outer wall.

Further, the distance between the limiting groove 33 and the barrel bottom is larger than the distance between the groove bottom of the clamping groove 32 and the barrel bottom. This arrangement ensures that the groove bottom of the groove 52 is flush with the groove bottom of the slot 32 when the retainer 50 is assembled, so as to facilitate the insertion of the fixing rod 10.

The fastening unit 40 is a hollow stud, the external thread of the stud is in threaded fit with the internal thread arranged on the inner wall of the connecting seat 30, and the inner cavity of the proximal end of the stud is in a hexagon socket structure. The hexagonal socket structure provided in the inner cavity of the stud allows the fastening unit 40 to be easily screwed in using the most simple and common tools.

In order to ensure the functions of torsion and extension, the proximal end part of the bone nail 20 is provided with a rotating head 21, the external outline of the rotating head 21 is integrally in a closing-up shape and is in a bowl shape, the bottom of the bowl is connected with the nail body, an inner hexagonal structure is arranged in an inner cavity of the bowl opening, and the outer wall of the rotating head 21 is further provided with an anti-skidding rough surface. The rotary head 21 can rotate within the through hole 31 at a small angle, and a certain clearance is left between the rotary head 21 and the minimum position of the inner diameter of the limit seat 50, so as to ensure that the rotary head 21 can rotate.

In order to enhance the stability of the fixation to the spine, the radian of the inner wall of the through hole 31 is matched with the outer wall of the rotating head 21, and the inner wall is also provided with an anti-skid rough surface.

The connection holders 30 are provided at least two at intervals in the length direction of the fixing lever 10. Due to the principle of two points and one line, at least two connecting seats 30 are provided, and a plurality of groups of bone nails 20, limiting seats 50 and fastening units 40 are also provided in a matching manner, and the specific arrangement of the groups of bone nails should be determined according to the specific position and severity of the spine fracture.

In order to facilitate the reliable gripping of the connecting socket 30 by a tool, a recessed ring 34 is provided on the outer wall of the connecting socket 30 adjacent the bung. Thus, when the respective components are assembled, the connecting holder 30 is held by a special tool, and the connecting holder 30 is used as a base to be fitted to other components one by one.

The spinal fixation system is used as follows: at first confirm the nail point of penetrating of every bone nail 20 on the backbone (avoid blood vessel and nervous position department, follow the both sides of backbone respectively and nail into two sets of moreover the utility model discloses, pass the assembly good in the through-hole 31 of connecting seat 30 with bone nail 20, then use specialized tool to follow the nail tail of every bone nail 20 one by one and preset in nail point screw in the backbone, pack into spacing seat 50 and restrict the displacement of bone nail 20 at connecting seat 30 axial direction. The placing position of the fixing rod 10 is set on the vertebral body, the placing position mark of the fixing rod 10 is marked as a reference straight line, the connecting seats 30 are rotated, the axis of each clamping groove 32 is positioned on the same straight line, the fixing rod 10 is placed in the clamping grooves 32 of the connecting seats 30, all the connecting seats 30 are connected into a whole at the moment, the fastening units 40 are installed on each connecting seat 30 one by one, the external threads of the fastening units 40 are matched with the internal threads of the connecting seats 30, and the fixing rod 10 is compressed. The proximal end of the bone nail 20 and the connecting seat 30 form a running fit, so that the spine can be ensured to rotate at a certain angle on the premise of ensuring the fixed connection of the fractured spine, and the movement and recovery of the spine after the operation are facilitated.

Claims (9)

1. A spinal fixation system for animals, comprising a fixation rod (10) for connecting a fractured spine into one body and a bone screw (20) for fixing the spine to be fixed, characterized in that: the system further comprises a connecting seat (30), the proximal end of the bone nail (20) is in running fit with the connecting seat (30), the fixing rod (10) is fixed on the connecting seat (30) through the fastening unit (40), and a limiting seat (50) for limiting the bone nail (20) to move in the axial direction of the connecting seat (30) is further arranged in an inner cavity of the connecting seat (30) between the proximal end of the bone nail (20) and the fixing rod (10).

2. The spinal fixation system for animals according to claim 1, wherein: the connecting seat (30) wholly be the tubbiness, barrel head central point department of putting offers through-hole (31) that supply bone nail (20) to pass, the both sides of bucket wall are along cutting and keeping barrel head constitution card slot (32) that link up to the barrel head from the bucket, the groove length direction of card slot (32) is arranged with the axle core of connecting seat (30) is perpendicular, the width of card slot (32) is coincide with the diameter of dead lever (10), the tank bottom of card slot (32) is the arc that coincide with dead lever (10) outer wall, be provided with spacing recess (33) on the bucket wall inner wall of card slot (32) side, spacing recess (33) constitute the inlay card cooperation with spacing arch (51) that set up on spacing seat (50).

3. The spinal fixation system for animals according to claim 2, wherein: spacing seat (50) are whole to be the cover ring-type, spacing arch (51) constitute for setting up the turn-ups of keeping away from bone nail (20) one end tip at the lantern ring, the lantern ring is close to the inner wall of bone nail (20) one side and is for coinciding with bone nail (20) near-end tip, and the minimum diameter of inner wall is less than the diameter of bone nail (20) near-end tip, be provided with recess (52) that are used for holding dead lever (10) on spacing seat (50) the outer wall that is close to dead lever (10) one side, the tank bottom of recess (52) is for the arc anastomotic with dead lever (10) outer wall.

4. The spinal fixation system for animals according to claim 2, wherein: the distance between the limiting groove (33) and the barrel bottom is larger than the distance between the groove bottom of the clamping groove (32) and the barrel bottom.

5. The spinal fixation system for animals according to claim 1, wherein: the fastening unit (40) is a hollow stud, the external thread of the stud is in threaded fit with the internal thread arranged on the inner wall of the connecting seat (30), and the inner cavity of the near end of the stud is in a hexagon socket structure.

6. The spinal fixation system for animals according to claim 3, wherein: the proximal end tip of bone nail (20) is provided with rotating head (21), and rotating head (21) external profile is the bowl form of binding off form on the whole, links to each other with the nail body at the bottom of the bowl, is provided with the hexagon socket head structure in the inner chamber of bowl mouth, still is provided with the non-slip mat surface on the outer wall of rotating head (21).

7. the spinal fixation system for animals of claim 5, wherein: the radian of the inner wall of the through hole (31) is matched with the outer wall of the rotating head (21), and the inner wall is also provided with an anti-skid rough surface.

8. The spinal fixation system for animals of claim 5, wherein: the outer wall of the connecting seat (30) close to the bung hole is provided with a concave ring (34).

9. The spinal fixation system for animals according to any one of claims 1 to 8, wherein: at least two connecting seats (30) are arranged at intervals in the length direction of the fixing rod (10).