Transpedicular device for fixing the vertebral column

FIELD: medical engineering.

SUBSTANCE: device has ball and socket joint casings having cylindrical and supporting parts, transpedicular screws having spherical heads, axial rods and transverse tie rods. Lower unseparable lips are available on external surfaces of supporting parts of ball-and-socket joints. The upper lips are separable and they are mounted on cylindrical parts of the casings. Cylindrical grooves which radii are equal to the axial rod radii are available on opposite surfaces of the upper separable and lower unseparable lips of the ball-and-socket joints. External thread is available in cylindrical parts of the casings with fastening nuts mounted thereon for fixing the separable lips. Locking members controlling angular displacements of spherical heads along transpedicular screw axes are manufactured as fixing screws having ring-shaped cutting edge on contact side to enable one to introduce them into internal threaded openings of the cylindrical parts. The axial rods are manufactured as pivot levers having rod part on one end and bushings on the other end arranged in perpendicular to each other. Locking member for controlling bushings rotation of pivot levers relative to each other is manufactured as radial teeth on plug plane and locking screws for positioning in bushing holes.

EFFECT: rigid fixation of injured vertebral column segment; small-sized fixing members; reduced risk of traumatic complications.

6 dwg

 

The invention relates to medicine, namely to traumatology, orthopedics and neurosurgery, and is intended for the surgical treatment of injuries and diseases of the spine.

A device osteosynthesis of the spine, containing transpedicular screws, clamps axial rods and transpedicular screws, axial rods and crossties (RF patent No. 2176907, 2001, And 61 In 17/56).

The disadvantage of this device is the fact that the angular adaptation of the bone screw in the retainer has a step-by-step character, equal to the step size of the teeth of the spline that does not always provide the desired position of the screw relative to the retainer, making them difficult to fit, requires additional fold axial rods to align the splines. In addition, the use of this design does not allow dosage to carry out the reduction of the vertebrae in the axial plane of the mounting device, the locking rods and bone screws are large, which complicates its installation in patients with reduced body weight.

Known latch of the spine, consisting of transpedicular screws, clamps rod and screw nuts with break-away head, cross ties (transpedicular lock “TENOR” of the firm Medtronic Sofamor Danek)[1].

The disadvantage of this device are low console system properties when EfE is the first load, especially pronounced with simultaneous rotation of the component.

Closest to the claimed is transpedicular the latch of the spine, consisting of the corps ball joints with cylindrical and the bearing parts, transpedicular screws with ball heads, axial rods, transverse screeds [application U.S. No. 2003/0004512].

The disadvantage of this device is the lack of rigidity of the fixing ball heads transpedicular screws in place of the axial rods and screws at maximum tightening the fixing screws, which reduces console device properties in General axial loads, especially in patients with high body weight. In addition, when two or more level installation structure places the physiological curvature of the spine or when saving deformation operated spine requires bending, axial rods during their asymmetry with seats in place of the axial rods and transpedicular screws, the hosts themselves screws and axial rods have a fairly large size in the axial plane of the mounting structure, which complicates its installation in patients with reduced body weight.

The aim of the present invention is to provide a device that would provide a rigid, stable fixation of damages is the main segment of the spine with minimal use of fold axial rods when installing them in place of transpedicular screws and axial rods, having small dimensions fixing nodes in the axial plane of the mounting structure.

This objective is achieved in that in transpedicular retainer spine consisting of corps ball joints with cylindrical and the bearing parts, transpedicular screws with ball heads, axial rods, cross ties, according to the invention in reference parts of the buildings of the ball joints on the outer surface of the lower one-piece sponge, the upper jaws are made detachable and mounted on the cylindrical part of the hull, and turned to each other surfaces of the lower one-piece upper and a split sponges corps ball joints is cylindrical grooves with radii equal to the radii of the axial rod, the cylindrical parts of the outer housing is made of thread mounted on them fixing nuts for fixing the detachable jaws, the stoppers angular displacement of ball heads along the axis of transpedicular screws made in the form of locking screws with an annular cutting edge on the side of contact for installation into the inner threaded hole of the cylindrical parts and the axial rods made in the form of swivel levers located perpendicular to each other rod part at one end and a nut at the other, and the rotation stopper is of took swivel levers relative to each other is made in the form of radial teeth in the plane of the connector and locking screws for placement in the holes of the sleeves.

Figure 1 - shows a General view of the device; figure 2 is a view of the device side; figure 3 - view of the device rear; 4 - cross section a-a transpedicular latch figure 2; figure 5 is a locking screw, side view; figure 6 - axial rods with swivel levers, side view.

Transpedicular the latch of the spine consists of buildings of spherical hinges 1 cylinder 2 and the support 3 parts, transpedicular screws 4 with ball heads 5, the axial rods 6, the transverse tie-rods 7. In the bearing parts 3 corps ball joints 1 in the lower one-piece sponge 8, the upper split of the jaws 9 are mounted on the external thread 10 of the cylindrical parts 2 buildings 1 and fixed mounting nuts 11. On the bottom one-piece 8 and the upper split 9 sponges corps ball joints 1 is cylindrical groove 12 with radii equal to the radii of the axial rods 6. The stoppers angular displacement of the ball head 5-axis transpedicular screws 4 made in the form of clamping screws 13 with a circular cutting edge 14 on the side of contact for installation in the internal threaded holes 15 of the cylindrical parts 2. Axial rods 6 made in the form of swivel levers located perpendicular to each other rod part 16 on one end and a nut 17 on the other. The stopper of the rotation bushing swivel levers relative to each the Ruga made in the form of radial teeth 18 in the plane of the connector and locking screws 19 for placement in the holes 20 of the sleeves 17.

The proposed device is used as follows. An open procedure under General anesthesia skeletonwitch arch and the articular process from above and below the affected vertebra. If there is a need is laminectomy with revision dural SAC, spinal cord and roots at the level of the affected vertebra. Depending on the clinical situation is fixed between a one, two or more vertebrae above and below from being damaged. The introduction of transpedicular screws 4 through the roots of the arcs in the body of the vertebrae is carried out using the Tube (electron-optical converters in standard points using a pre-calculated trajectory of the introduction screws on MRI or x-ray computed tomography with the formation of channels through the guide device, drill, tap. Before screwing formed in the screw channels transpedicular screws 4 with ball heads 5 are inserted in a cylindrical 2 and the support part 3 corps ball joints 1 and in this position transpedicular screws 4 pairs are screwed into the vertebral body through the roots of the arcs above and below the damaged vertebra to the ball head 5 located in the bearing parts 3 corps ball joints 1. In cylindrical grooves 12 of the lower one-piece jaws 8 in the bearing parts 3 buildings of spherical ball is irov 1 stacked axial rods 6. In the case of single-level fixation used cylindrical axial rod without turning levers. In the case of two and more level of fixation of the axial rods 6 with the swing arm, and the sleeve 17 of the swivel levers have on the level of the affected vertebra. Adapt core part 16 of the swivel levers to cylindrical grooves 12 of the lower one-piece jaws 8, while the radii of the cylindrical grooves and core parts 16 of the swivel levers are the same. Set on tsilindricheskie part 2 corps ball joints 1 with an external thread 10 of the upper detachable sponge 9. Adapt coaxial cylindrical grooves 12 and the rod part 16 of the axial rods 6 and in position nonrigid fixation press them to each other fastening nuts 11. Fixing screws 13 are inserted into the inner threaded hole 15 in the cylindrical parts 2 blocks ball joints 1 to contact the annular cutting edges 14 with ball head 5 without a final twist. The holes 20 of the sleeves 17 of the swivel levers combine axis and fixed in position by temporary fixation with locking screws 19. Upon completion of the temporary fixing all transpedicular screws 4 and bushings 17 of the swivel levers axial rods 6 conduct the final tightening of the fixing screws 13 with a circular cutting edge 14 at GNC is Rennie threaded holes 15 of the cylindrical parts 2 blocks ball joints 1 with final rigid fixing of ball heads 5 in the bearing parts 3 corps ball joints 1 at a given angle. Next is compression, distraction, reduction or angular correction of the different segments of the vertebral structures relative to each other using repairaudio device. Holding repairwoman device selected correction degree is operated spine, tighten the set screws 19 in the holes 20 of the sleeves 17 of the swivel levers, with radial teeth 18 of the bushing 17 of the swivel levers on the plane of the connector rigidly attach to each other at a given angle determined by the surgeon. For additional rigidity of the installed structures impose two crossties 7. Convinced of the strength and stability of the fixation device opererating spine, surgical wound is sutured.

The application of the proposed device will allow you to:

to provide a rigid, stable fixation of the damaged segment of the spine with the use of fixing nodes is small, the use of which prevents excessive trauma of the paravertebral muscles, facilitates the installation of the clamp in patients with reduced body weight,

- minimal use of fold axial rods when they are set in place transpedicular screws and axial rods.

Transpedicular the latch of the spine, consisting of the corps ball joints with cylindricus the mi and the supporting parts, transpedicular screws with ball heads, axial rods, cross ties, characterized in that the supporting parts of the buildings of the ball joints on the outer surface of the lower one-piece sponge, the upper jaws are made detachable and mounted on the cylindrical part of the hull, and turned to each other surfaces of the lower one-piece upper and a split sponges corps ball joints is cylindrical groove radii equal to the radii of the axial rod, the cylindrical parts of the outer housing is made of thread mounted on them fixing nuts for fixing the detachable jaws, the stoppers angular displacement of ball heads along the axis of transpedicular screws made in the form of locking screws the annular cutting edge on the side of contact for installation into the inner threaded hole of the cylindrical parts and the axial rods made in the form of swivel levers located perpendicular to each other rod part at one end and a nut at the other, and the stopper of the rotation bushing swivel levers relative to each other is made in the form of radial teeth in the plane of the connector and locking screws for placement in the holes of the sleeves.



 

Same patents:

FIELD: medicine; medical engineering.

SUBSTANCE: device has at least one connection member shaped as rod, at least two fixing means each fixable on vertebra body. The means have fork-shaped head parts which two branches determine U-shaped receiving space for the connection member to fit into it. Head is, as a rule, saddle-shaped, has locking screw for screwing-in into receiving space for fixing the connection member between two fork-shaped head branches. The head is guiding member for independent locking piece usable for carrying out fixation on the head after having set connection member into head fork. The locking piece is usually U-shaped, its branches being engageable with fork-shaped head part branches and its bottom part having opening with internal thread engageable with the locking screw. The guiding member available on the head part is formed with arc-shaped flanges available on lateral external surfaces of fork-shaped area. Fixing member has fork head, two branches of which determine receiving space of strictly U-shaped form for receiving connection member. Head is, as a rule, saddle-shaped. It serves as guiding member for independent locking piece usable for carrying out fixation on the head after having set connection member into head fork. The locking piece is usually U-shaped, its branches being engageable with fork-shaped head part branches and its bottom part having opening with internal thread engageable with the blocking screw. The guiding means available on the head part is formed with arc-shaped flanges available on lateral external surfaces of fork-shaped area. Auxiliary member has two end pieces positionable in slots available on implant head part and a means for applying force to the rod for causing lateral or vertical displacement to allow rod to be positionable in the slot.

EFFECT: retained correction degree and final fixation and tightening of screws selected by surgeon during operation.

12 cl, 4 dwg

FIELD: medical engineering.

SUBSTANCE: device has supporting frame and threaded rods mounted thereon to enable their transpedicular introduction into displaced vertebra body to take place with triangular structure being formed which apex is directed towards vertebral body. The supporting frame has screws introduced in transpedicular way into vertebral bodies adjacent to the displaced one, and connective bars building rigid structure by means of crossbars. The device has additional removable reposition frame resting upon the connective bars and joined to the threaded rods by means of transverse beam serving as triangular rigid structure base movable relative to the supporting frame. The screws and threaded rods have two threaded parts separated with spherical head, one of which is used for being introduced into bone tissue, and the other one is used for making connection to the connective bars. The connection is made as detachable floating fixing members having concave spherical surface for receiving rod and screw heads with variable connection angle. The detachable floating fixing members of the threaded rods have slots for receiving fingers connecting the threaded rods to the supporting frame allowing variable connection distances from the connective bars.

EFFECT: enhanced effectiveness of treatment.

2 dwg

FIELD: medical engineering.

SUBSTANCE: device has plates having longitudinal segmentally counterbored slots and fastening members manufactured as bone screws with clamps. The clamps are manufactured as cramps having threaded openings in lower shelf. Locking members are mounted in threaded openings of the clamps. The locking members have threaded heads, hexagonal slot and smooth conic part set in hexagonal bone screw head slots. The bone screws are set in longitudinal segmentally counterbored slots of the plates. Their narrow parts under the heads pass through slits in the lower shelves of the clamps. The plates are connected to each other with cross-bar manufactured as rod ending with hook on one end which upper shelf has threaded hole for receiving locking member having threaded head, hexagonal slot and smooth thrusting part for fixing the cross-bar to a plate, the other free cross-bar end having corrugated part, has cross-bar clamp manufactured as cramps having threaded opening in upper shelf for receiving locking member having threaded head, hexagonal slot and smooth thrusting part supported by corrugated surface of the cross-bar to fix the cross-bar to the second plate. A hole is available in the upright connecting crossbar clamp shelves. The corrugated free crossbar end is movable and fixable in the hole.

EFFECT: enhanced effectiveness of treatment; reduced risk of traumatic complications; avoided blood deposit under plates.

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FIELD: medicine; medical engineering.

SUBSTANCE: device is rectangular and has four or more slits for fixing means to pass through each of them. Two slits have exit to lateral side of plate to enable one to set the plate at required position and fix it without preliminarily removing the instrument for correcting orientation relative to vertebral column. Lateral plate surface runs from edge pointing the same direction with longitudinal plate direction. The latter exactly coincides with the vertebral column direction. The system comprises several vertebral column osteosynthesis plates to keep orientation correction relative to the vertebral column unchanged. Correction is carried out by means of the instrument for correcting orientation.

EFFECT: less number of holes to be drilled for mounting the device.

11 cl, 10 dwg

FIELD: medical engineering.

SUBSTANCE: device has two elastic plates and unit for fastening the plates to vertebral arches by means of two hooks placed under the arches on both sides of spinous process, two pins attached to corresponding hook with threaded connection and thrown over the hook with support given by its thrust journal for fastening arches in corresponding hook. The pins have restricting rest means. Connection strap is manufactured as a whole with elastic plate holders building U-shaped clamp having locking protrusions at pedicle ends turned inward. Plate holders are formed by clamp pedicles and locking protrusions. Elongated slot is available in clamp crossbar. The clamp is put over the pins via the elongated slot of the crossbar thrusting against restricting rest means of pins and connected to the pins by means of two nuts screwed over the corresponding pin from the external clamp side. Catching cells are produced in thrust journal of each hook for making additional fixation of the pins.

EFFECT: increased rigidity; fixation stability; accelerated operation process; reduced risk of traumatic complications.

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The invention relates to medicine, namely to traumatology

FIELD: medical engineering.

SUBSTANCE: device has two elastic plates and unit for fastening the plates to vertebral arches by means of two hooks placed under the arches on both sides of spinous process, two pins attached to corresponding hook with threaded connection and thrown over the hook with support given by its thrust journal for fastening arches in corresponding hook. The pins have restricting rest means. Connection strap is manufactured as a whole with elastic plate holders building U-shaped clamp having locking protrusions at pedicle ends turned inward. Plate holders are formed by clamp pedicles and locking protrusions. Elongated slot is available in clamp crossbar. The clamp is put over the pins via the elongated slot of the crossbar thrusting against restricting rest means of pins and connected to the pins by means of two nuts screwed over the corresponding pin from the external clamp side. Catching cells are produced in thrust journal of each hook for making additional fixation of the pins.

EFFECT: increased rigidity; fixation stability; accelerated operation process; reduced risk of traumatic complications.

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FIELD: medicine; medical engineering.

SUBSTANCE: device is rectangular and has four or more slits for fixing means to pass through each of them. Two slits have exit to lateral side of plate to enable one to set the plate at required position and fix it without preliminarily removing the instrument for correcting orientation relative to vertebral column. Lateral plate surface runs from edge pointing the same direction with longitudinal plate direction. The latter exactly coincides with the vertebral column direction. The system comprises several vertebral column osteosynthesis plates to keep orientation correction relative to the vertebral column unchanged. Correction is carried out by means of the instrument for correcting orientation.

EFFECT: less number of holes to be drilled for mounting the device.

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FIELD: medical engineering.

SUBSTANCE: device has plates having longitudinal segmentally counterbored slots and fastening members manufactured as bone screws with clamps. The clamps are manufactured as cramps having threaded openings in lower shelf. Locking members are mounted in threaded openings of the clamps. The locking members have threaded heads, hexagonal slot and smooth conic part set in hexagonal bone screw head slots. The bone screws are set in longitudinal segmentally counterbored slots of the plates. Their narrow parts under the heads pass through slits in the lower shelves of the clamps. The plates are connected to each other with cross-bar manufactured as rod ending with hook on one end which upper shelf has threaded hole for receiving locking member having threaded head, hexagonal slot and smooth thrusting part for fixing the cross-bar to a plate, the other free cross-bar end having corrugated part, has cross-bar clamp manufactured as cramps having threaded opening in upper shelf for receiving locking member having threaded head, hexagonal slot and smooth thrusting part supported by corrugated surface of the cross-bar to fix the cross-bar to the second plate. A hole is available in the upright connecting crossbar clamp shelves. The corrugated free crossbar end is movable and fixable in the hole.

EFFECT: enhanced effectiveness of treatment; reduced risk of traumatic complications; avoided blood deposit under plates.

9 dwg

FIELD: medical engineering.

SUBSTANCE: device has supporting frame and threaded rods mounted thereon to enable their transpedicular introduction into displaced vertebra body to take place with triangular structure being formed which apex is directed towards vertebral body. The supporting frame has screws introduced in transpedicular way into vertebral bodies adjacent to the displaced one, and connective bars building rigid structure by means of crossbars. The device has additional removable reposition frame resting upon the connective bars and joined to the threaded rods by means of transverse beam serving as triangular rigid structure base movable relative to the supporting frame. The screws and threaded rods have two threaded parts separated with spherical head, one of which is used for being introduced into bone tissue, and the other one is used for making connection to the connective bars. The connection is made as detachable floating fixing members having concave spherical surface for receiving rod and screw heads with variable connection angle. The detachable floating fixing members of the threaded rods have slots for receiving fingers connecting the threaded rods to the supporting frame allowing variable connection distances from the connective bars.

EFFECT: enhanced effectiveness of treatment.

2 dwg

FIELD: medicine; medical engineering.

SUBSTANCE: device has at least one connection member shaped as rod, at least two fixing means each fixable on vertebra body. The means have fork-shaped head parts which two branches determine U-shaped receiving space for the connection member to fit into it. Head is, as a rule, saddle-shaped, has locking screw for screwing-in into receiving space for fixing the connection member between two fork-shaped head branches. The head is guiding member for independent locking piece usable for carrying out fixation on the head after having set connection member into head fork. The locking piece is usually U-shaped, its branches being engageable with fork-shaped head part branches and its bottom part having opening with internal thread engageable with the locking screw. The guiding member available on the head part is formed with arc-shaped flanges available on lateral external surfaces of fork-shaped area. Fixing member has fork head, two branches of which determine receiving space of strictly U-shaped form for receiving connection member. Head is, as a rule, saddle-shaped. It serves as guiding member for independent locking piece usable for carrying out fixation on the head after having set connection member into head fork. The locking piece is usually U-shaped, its branches being engageable with fork-shaped head part branches and its bottom part having opening with internal thread engageable with the blocking screw. The guiding means available on the head part is formed with arc-shaped flanges available on lateral external surfaces of fork-shaped area. Auxiliary member has two end pieces positionable in slots available on implant head part and a means for applying force to the rod for causing lateral or vertical displacement to allow rod to be positionable in the slot.

EFFECT: retained correction degree and final fixation and tightening of screws selected by surgeon during operation.

12 cl, 4 dwg

FIELD: medical engineering.

SUBSTANCE: device has ball and socket joint casings having cylindrical and supporting parts, transpedicular screws having spherical heads, axial rods and transverse tie rods. Lower unseparable lips are available on external surfaces of supporting parts of ball-and-socket joints. The upper lips are separable and they are mounted on cylindrical parts of the casings. Cylindrical grooves which radii are equal to the axial rod radii are available on opposite surfaces of the upper separable and lower unseparable lips of the ball-and-socket joints. External thread is available in cylindrical parts of the casings with fastening nuts mounted thereon for fixing the separable lips. Locking members controlling angular displacements of spherical heads along transpedicular screw axes are manufactured as fixing screws having ring-shaped cutting edge on contact side to enable one to introduce them into internal threaded openings of the cylindrical parts. The axial rods are manufactured as pivot levers having rod part on one end and bushings on the other end arranged in perpendicular to each other. Locking member for controlling bushings rotation of pivot levers relative to each other is manufactured as radial teeth on plug plane and locking screws for positioning in bushing holes.

EFFECT: rigid fixation of injured vertebral column segment; small-sized fixing members; reduced risk of traumatic complications.

6 dwg

FIELD: medicine; neurosurgery; traumatic surgery.

SUBSTANCE: holder can be used for stabilization of damaged sectors of spinal column. Holder has transpedicular screws, longitudinal and lateral beams, fixing unit with two mutually perpendicular holes for screws and longitudinal beam. Longitudinal beams are made of shape-memory-effect material, which provides flexural rigidity of holder within 10 to 80 H/mm.

EFFECT: reduced risk of post-operational complications; stabilized traumatized segment of spinal column.

5 cl, 1 dwg

FIELD: medicine, in particular, equipment used in traumatology and orthopedics.

SUBSTANCE: apparatus has connection member 5, sealing cap 12, tightening means 13, locking means 21 for fixation, fixation means 35 used for securing of screw head 30 of bone fixation means in cavity 8 of connection member 5. Connection member 5 is positioned coaxially relative to central axis 2 and has upper end 6, lower end 7, cavity 8 arranged coaxially relative to central axis 2 extending through connection member 5 from its upper end 6 to its lower end 7, said cavity converging to its lower end 7 formed as at least one flange 9, and channel 10 extending through connection member 5 transverse to longitudinal axis 2 for receiving of longitudinal holder 11. Sealing cap 12 has front end 20, rear end 19, second cavity 18 open at its front end 20 for locating therein of connection member 5, and second channel 17 extending transverse to central axis 2 and opening toward front end 20 of sealing cap 12. Tightening means 13 may be fixed at rear end 19 of sealing cap 12 for retaining of longitudinal holder 11 located in channel 10 in connection member 5. Locking means 21 are positioned outside connection member 5 and in second cavity 18 of sealing cap 12 so as to mate each other and serve for fixation of sealing cap 12 on connection member 5.

EFFECT: increased efficiency owing to reduced space for implantation which is due to the possibility of introducing surgical instrument having diameter smaller than that of implant for preventing surrounding tissues from injury.

7 cl, 6 dwg

FIELD: medicine, traumatology, orthopedics.

SUBSTANCE: the present innovation deals with fixing affected segment in thoracic, lumbar and sacral vertebral departments. One should apply supporting elements of transpedicular system of bars which should be crossed in frontal plane and connected together with a fixing knot to regulate the angle of bars' crossing depending upon the requirements appeared, moreover, supporting elements should be applied through pedicles of vertebral arches that increases reliability of fixation at achieving osseous ankylosis.

EFFECT: higher efficiency.

2 dwg, 1 ex

FIELD: medicine; traumatic surgery; orthopedic devices.

SUBSTANCE: device for applying lengthening or stretching force to patient's body has aid for fastening first and second components to bones or to adjacent bones. Mentioned components are connected by increasing-length connecting aid. Device also has magnet connected with connecting aid and drive unit disposed outside patient's body for generating moving or changing electromagnetic field which results in rotation of magnet and elongation of connecting aid. Connecting aid has screw and nut. Magnet is connected with screw and nut by means of transmission box to generate relative rotation for elongating the device. Endoprosthesis replacement device to be elongated has first and second components that are connected by increasing-length unit. The first component has fraction of extremity joint. The second component has aid for fastening to resected long bone, magnet connected with connecting unit, and aid adjusted for disposition outside patient's body for generation of moving electromagnetic field which results in rotation of magnet and elongation of connecting unit. Magnet is connected with connecting unit by means of reduction gear. Device for correcting curvature of the spine has first and second shafts for elongation. Any shaft has its end to be connected with aid for fastening to corresponding vertebra. Connecting unit is adjusted in such a way that ends provided with fastening means were relatively movable. Mentioned connecting unit is connected with drive mechanism, which has rotated magnet, reduction gear, and drive aid for disposition outside patient's body. Generated moving or changing electric/magnetic field induces rotation of magnet and motion of fastening aid, disposed onto one shaft, relatively fastening aid, disposed at the other shaft.

EFFECT: elongation of bones or implants without surgical operation.

15 cl, 5 dwg

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