Device for correcting and fixing the vertebral column

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

 

The invention relates to medicine, namely to traumatology and can be used to reposition the displaced vertebrae, the axis correction and fixation of the spine.

A device for stabilization and correction of spinal deformity, containing the base and installed threaded rods, and the base is made in the form of a Central transverse rods of two parts, connected with the possibility of multi-directional translational motion components, each of which is articulated and can move installed two pairs of longitudinal threaded rods, fixed ends with the possibility ploskoparallyel move in the brackets (patent RF №2065732, MCI And 61 In 17/66, publ. BI No. 24, 27.08.96 year).

The disadvantage of this device is ineffective correction of the spine in spondylolisthesis due to the impossibility reposition the displaced vertebra.

A device for adjustment of the axis and posterior fixation of the spine, containing situated along the axis of the spine supporting cylindrical rods and rigidly United with them threaded screws made with the possibility of transpedicular introduction into the body of the vertebrae, pedicularia and laminar hooks (Y.Cotrel. New Instrumentation for Surgery of The Spine. - London WIR 5FA. England, 1986. - 129 p.; Cotrel y, Dubousset J. Nouvelle technique rachidienne segmentfire par vote posterieure // ev. Chir. Orthop. - V.70. - P.489-495).

The disadvantage of this device is that to ensure the rigidity of the assembled device to be perpendicular to each other, the connection held transpedicular bolts and anchor rods. When polysegmental lesions requiring multi-level layout of the device, the location of transpedicular screws, pedicularia, laminarnyi hooks should be at the same distance and on the same axis along the support bar, which is impossible when the displacements of the adjacent vertebrae across the width or angle. In addition, this device is not effective for the correction of the spine in spondylolisthesis due to the inability reposition the displaced vertebra.

The closest to the invention is a device for correction of the spine containing the base and installed threaded rods made with transpedicular introduction into the body of a displaced vertebra, and the base is made in the form of a support frame consisting of screws, put transpedicular in the body of the vertebrae adjacent to the displaced, and the connecting rods, forming a rigid structure by means of uprights, and a threaded rod rigidly connected by a transverse beam, forming a triangular structure with the apex directed towards the offset of the spine. This triangular con who traccia movably connected through the rod and base plate with a support frame to lock the latter (mon. Of the Russian Federation No. 14009, IPC And 61 F 5/00, publ. 27.06.2000,).

A disadvantage of this device is the need for perpendicular connection transpedicular screws and bearing of the connecting rod, as well as in the multi-level layout of the device need the location of transpedicular screws at the same level and on the same axis as the connecting rods. In addition, the transverse beam rigidly connecting threaded rods, input in is shifted in spondylolisthesis vertebra and connected to it a support plate mounted on the base frame, limit the range of reduction of a displaced vertebra, and completely cover the rear sections of the operated vertebra and restrict him operational access. With the development of cicatricial process at this level, the removal of this design much more difficult and dangerous elements damage the spinal cord.

The proposed device is aimed at improving the efficiency of correction of the spine by providing rigidity commit any displacement of the vertebrae, as well as achieving a reduction of a displaced vertebra in the sagittal plane without limitation of operational access at this level.

This object is achieved by a device for the correction and fixation of the spine containing the support frame and set it as threaded rods, done is installed with transpedicular introduction into the body of a displaced vertebra with the formation of triangular design, the vertex of which is directed toward the vertebra, and the supporting frame consists of screws, put transpedicular in the body of the vertebrae adjacent to the displaced, and the connecting rods, forming a rigid structure by means of crossbeams, which is in contrast to the prototype further comprises based on the connecting rod removable repairbuy frame connected with threaded rods through the transverse beams, which are the basis of a rigid triangular structure having the ability to move relative to the support frame, and the screws and threaded rods consist of two threaded parts, separated by a spherical head, one of which is intended for insertion into the bone tissue of the vertebrae, and the other is for fastening to the connecting rod, and fastening made in the form of a collapsible floating clamps with a concave spherical surface at the head of rods and screws with the ability to change the angle of the mounting and collapsible floating clamps threaded rods have grooves under the “fingers”connecting threaded rods with a supporting frame with the possibility of changing the distance of the attachment from the connecting rods.

Unlike the prototype reposition displaced in the sagittal plane of the vertebrae in spondylolisthesis is made with threaded rods, put the transponder is tolarno in the body repairwear vertebra and the United temporary repairwoman frame, based on the connecting rod with the formation of a rigid triangular structure in the form of “ticks” with the apex directed towards the body of a displaced vertebra.

After the repositioning of a displaced vertebra fixing screw rod to the connecting rods of the base frame through worn on their fingers with collapsible floating clamps with grooves for fingers and a spherical concave surface under a ball bearing transpedicular rod. After removal of the removable repairwoman frame rigidity of the triangular construction of rods, the locking eponymy vertebra, is preserved remains free access to its back departments. Subsequently, after formation of the bone block destruction of structures made easily without danger of damage to the median structures.

The invention is illustrated by drawings, where figure 1 presents the design of a device for correction of spinal assembled in the process reposition the displaced vertebra, figure 2 shows the device in the incision with fixed threaded rods after removal repairwoman frame.

The device comprises a support frame consisting of screws 1 entered transpedicular in the body of the vertebrae adjacent to the displaced, the connecting rods 2, the uprights 3. The device also contains threaded with erini 4, mounted on the base frame on the connecting rods 2 of the base frame and consisting of two threaded parts separated spherical head 5. The threaded part 6 is inserted into the bone of the vertebra 7 and part 8 is designed for attachment to the connecting rod 2. Similarly performed screws 1 support frame, also mounted on the connecting rod 2. Mounting threaded rods and screws made in the form of a collapsible floating clamps 9 with a concave spherical surface at the head of the threaded rods and screws.

In the slots collapsible floating clamps threaded rods installed “fingers” 10 connecting threaded rods with base. These fasteners allow you to adjust the angle and distance of the mounting depending on the individual characteristics of the vertebra 7.

The device also includes a removable repairbuy frame 11 connected to a supporting frame (bars 2). The threaded rods 4 by means of transverse beams 12 create a rigid triangular structure. On the cross beam 12 has a screw 13 that allows you to move the selected design together with repairwoman vertebra relative to the reference frame using the nuts 14.

The device operates as follows.

The rear longitudinal access layers are exposed arch and the articular process is shifted toward the front of the vertebra the two adjacent vertebrae. The bodies of the adjacent vertebrae through the roots of the bows introduce two screws 1. Through the roots of the bows of a displaced vertebra 7 enter two threaded rod 4. With all the screws and rods in the vertebral bodies form in the sagittal plane angle, facing the top of the front.

Upper and lower pairs of screws 1, introduced into the body adjacent to the displaced vertebrae are connected by two connecting rods 2 with pre-worn on two fingers 10. The fingers remain between the screws on the level of a displaced vertebra. The ends of the connecting rods are fastened to the uprights 3 education support frames.

Is laminectomy is displaced anterior to vertebra and on the testimony of the revision of the spinal canal, roots. At the level of the received access to the vertebral channel on the connecting rod 2 is installed “legs” repairwoman frame 11, and the protruding ends 8 threaded rods rigidly connected cross bar 12 repairwoman frame with the formation of a rigid triangular structure. When this transverse beam repairwoman frame should be close to the reference frame. Using a screw device 13 of the transverse beam 12 repairwoman frame fixed inside threaded rods 4, fastening in the form of “ticks” of the displaced vertebra 7, is extended backwards to achieve the necessary reposition the vertebrae. the ATEM threaded rods with collapsible floating clamps 9 through the fingers 10 are rigidly attached to the connecting rod 2 with preservation of collected triangular design. The transverse beam 12 is detached from the ends 8 of the threaded rods, repairwoman frame 11 is removed. All the speakers over the fasteners threaded ends of the screws and rods skazyvayutsya. Area operational access to the rear sections of vertebrae completely. Is the control and revision of the spinal canal. Set active drainages, and the wound is sutured in layers.

Thus, the proposed solution allows to increase the efficiency of correction of the spine without limitation of operational access.

A device for correction and fixation of the spine containing the support frame and set it as threaded rods, made with transpedicular introduction into the body of a displaced vertebra with the formation of triangular design, the top of which is directed toward the vertebral body, and the supporting frame consists of screws, put transpedicular in the body of the vertebrae adjacent to the displaced, and the connecting rods, forming a rigid structure by means of spars, characterized in that it further comprises based on the connecting rod removable repairbuy frame connected with threaded rods through the transverse beams, which are the basis of a rigid triangular structure having the opportunity to move relative to oporn the th frame, and screws and threaded rods consist of two threaded parts, separated by a spherical head, one of which is intended for insertion into the bone tissue of the vertebrae, and the other designed for attachment to the connecting rod, and fastening made in the form of a collapsible floating clamps with a concave spherical surface at the head of rods and screws with the ability to change the angle of the mounting and collapsible floating clamps threaded rods have grooves under the “fingers”connecting threaded rods with a supporting frame with the possibility of changing the distance of the attachment from the connecting rods.



 

Same patents:

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: 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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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.

2 cl, 3 dwg

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 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.

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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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