A device for correction of spinal deformities

 

The invention relates to medical equipment, namely to devices used for surgical correction of spinal deformities. The invention improves the efficiency of surgical treatment, reduction of terms of hospital stay, decreased morbidity and the risk of complications. The device comprises a reference-fixing elements of the bony structures of the spine, coupled telescopically screw and tube, locking nut, located on the screw, and the distraction nut is placed along the axis of the screw. The tube is made without internal thread and with a through screw holes for the retaining screws, penetrating into the lumen of the tube. On spare tube and the screw area reticulated knurling for mounting the supporting-fixing elements of the bony structures of the spine. Distraction nut and telescopic tube have on the mating end surfaces of the teeth in the shape of a rectangular triangle with the long leg at the base. 1 Il.

The invention relates to medical equipment, namely to devices used for surgical correction of spinal deformities.

Known telescopic device to correct and fix Utri thread, up to half of the length of the hull right at the other half left. In case telescopically mounted two (right and left threads) screw fixation to the spine and the iliac crest at the ends, and two locknuts [USSR Author's certificate No. 145483, And 61 F 5/37, 1961].

This device is used for the correction of scoliotic deformities of the lumbar spine and is not intended for correction of lateral curvatures of different localization. Using the device it is possible to adjust only scoliotic component of deformation due to distraction with no denotate, correction of the kyphotic component and decompensated curvatures due to the broadcast. The use of the device leads to straighten or kittisaro in the lumbar lordosis with the emergence in subsequent complications in the form of a symptom of a “flat back”. In the postoperative period, possible loss achieved correction due to self-unfastening screws distractor.

The closest to the essence of the technical solution of the present device is distractor, consisting of a hollow cylinder with internal thread and paw at the blind end mounted telescopically in the hollow cylinder is idealisti of the USSR №634740, AND 61 IN 17/18, 1977].

This device is used for the correction of scoliotic deformities of the lumbar spine and is not intended for correction of lateral curvatures of different localization. The fixation structure to the bone structures of the same type (Y-shaped legs), rigidly fixed to the screw and hollow cylinder. The fixation structure to the spine at the expense of creating emphasis feet in bone structure, so it is possible to adjust only scoliotic component due to the distraction and correction impossible decompensated curvatures due to broadcast and kyphotic component of deformation due to the extension.

For actuation and removal of the device you want to use additional tools (two special key), which increases material costs, complicates manipulation and makes the operation more traumatic.

System, excluding self-unfastening of the screw, does not preclude the rotation of the screw within 180°. In this regard, for fixation of the spine design is stored rotational mobility, which often leads to the emergence of pseudoarthrosis in the zone of fusion.

Correction of this distractor scoliotic beniam in subsequent complications in the form of a symptom of a “flat back”, requiring in some cases additional surgery.

The present invention is to improve the efficiency of surgical treatment, reduction of terms of hospital stay, decreased morbidity and the risk of complications, rejection of external immobilization in the postoperative period, the decrease in the number of cases of morbidity and duration of stay on disability.

The technical result is achieved due to the fact that the mounting area of the support elements and fixation screw and a telescopic tube universal. It allows you to record different sizes of open and closed hooks, transpedicular screws, in various combinations, sequences and in different quantity.

The possibility of individual design is implemented due to the fact that spur of the telescopic tube, a core part of the nozzle and the screw can be bent by means of levers in different planes. This allows Omni-directional, phase correction of gross deformities of the spine (at impossibility of simultaneous correction of deformities of the spine), and also gives the ability to save and simulate natural fisiologica of the fixation screw to avoid self-unfastening is achieved through the use of splines in the shape of a rectangular triangle with the long leg at the base, forming retaining a pair of ratcheting mechanism on the mating surfaces of the nut and the telescopic tube locking nut and two additional clamping bolts.

Simplification of the mounting structure is due to the fact that when the distraction does not require additional keys, because the nut is conveniently rotated by means sequestrating forceps. In addition, the fixing elements are attached to the distractor after they will be fixed at the supporting bone structure as rigidly fixed to the screw and the telescopic tube distractor supporting elements to record for the bone structure can be difficult, and when rough and decompensated curvatures impossible. The presence of mating components, screws and extension of the tip, as well as fixing only one end of the distractor can be used as levers of the first kind, which facilitates the correction of kyphosis due to extension and elimination of decompensation due to broadcast.

The problem is solved due to the fact that the device for correction of spinal deformities anchor-fixing elements of the bony structures of the spine, coupled telescopically screw and tube, kopirovaniyu nut, RA performed without internal thread and with a through screw holes for the retaining screws, penetrating into the lumen of the tube, spare tube and the screw area reticulated knurling for mounting the supporting-fixing elements of the bony structures of the spine, distraction nut and telescopic tube have on the mating end surfaces of the teeth in the shape of a rectangular triangle with the long leg at the base.

The invention is illustrated in the drawing, which presents a General view of the device in the assembled state.

The device consists of a tube 1 and the screw 2, the connected telescopically and two placed along the axis of the screw nuts: distraction 3 and 4 safety. Along the circumference of the mating end surfaces of the distraction nuts and telescopic tube has teeth 8 and 9, in the form of a rectangular triangle with the long leg at the base, forming a pair of locking ratchet mechanism. At the blind end of the tube is made spur mesh with knurling for mounting the supporting-fixing elements 5. On the wall of the telescopic tube is made of rectangular protrusions with a through threaded holes in the center 7, in which twisted the locking bolts 6. The screw is divided into two unequal parts, the larger is the screw 10 and smaller - mesh with knurling for mounting the supporting-fixing dstone at the time of correction of the deformity or for a longer period.

The device is used as follows. Known methods is access to the rear spine. After placing over the bony structures of the spine, upper and lower bearing-locking elements (hooks, screws, tape, inserts, studs) on both sides of the deformation of the screw turn in on the value of the physiological kyphosis in the area of the reticulated knurling, and the device in the assembled state is rigidly fixed to the upper supporting-fixing elements 3 knurling screws on either side of the deformation. Spur of the telescopic tube bends on the value of the physiological lordosis and using customerarea, by force led to the support elements and fixing. In the area of the reticulated knurling device sequentially rigidly fixed to the support-fixing elements located Caudalie on the corresponding side. Due to the rotation of the distraction nut with ratchet answer provide distraction to get the maximum correction along the axis of the spine. To eliminate rotational movement of the nut sbencivu until it stops in the distraction nut, retainer bolts twist to lock in the screw. After running back spinal fusion at once, or in stages corrective ustroystva.esli.

Claims

A device for correction of spinal deformities, containing reference-fixing elements of the bony structures of the spine, coupled telescopically screw and tube, locking nut, located on the screw, characterized in that it is provided with a distraction nut is placed along the axis of the screw, the tube is made without internal thread and with a through screw holes for the retaining screws, penetrating into the lumen of the tube, spare tube and the screw area reticulated knurling for mounting the supporting-fixing elements of the bony structures of the spine, distraction nut and telescopic tube have on the mating end surfaces of the teeth in the shape of a rectangular triangle with the long leg at the base.

 

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Distractor // 2212205
The invention relates to medicine, namely to devices for the surgical correction of spinal curvature

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.

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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