The latch of the spine
(57) Abstract:The invention relates to medicine, is used in traumatology and neurosurgery. The latch includes two plates with through holes, into which enter the bone screws with spherical heads. Last through the threads are connected to the pins, providing the ability to perform reclinate and fixation, including through the use of devices of external transosseous fixation. The technical result - the reduction of trauma intervention and improved treatment outcomes. 2 Il. The device is used in medicine, specifically in traumatology and neurosurgery, and is intended to reclinate and fixation of vertebral fractures their phoneThere are known various devices for transpedicular fixation of the vertebral bodies as, for example, paticularly lock company Stryker (1), which is a set of bone screws with split heads, connected smooth longitudinal rods. Another similar can serve as an internal transpedicular the latch of the spine (2), containing bone screws, connected through a system of clips longitudinal threaded rods.Both have similar weeks the and spine. Another disadvantage is that the convergence or remove from each other heads of bone screws along the curved longitudinal threaded rods is almost impossible. The angular deviation of the bone screws permitted devices, insignificant, which may be insufficient for carrying out reclinate. In addition to these, a significant drawback of both analogues should be considered that the longitudinal rods, due to the massiveness of the hoops and heads of the bone screws are placed at a distance from the temples. Thus between the longitudinal rods and arms are formed "dead space" that could serve as a depot for streamed blood, and the heads of the bone screws thus are not deep enough under the skin. Both of these devices do not provide opportunities dosed reclinate using the device for external transosseous fixation (UNCF).The closest in terms of its technical solution to offer is a latch spine Steffee (3), considered as the prototype. The device comprises a plate with longitudinal grooves having segmental countersunk on the outer surface, through which the outer surface of the plate held a threaded stauts on the inner surface of the plate. The bone screws have the opportunity to move along the grooves and to deviate from the axis and for fixing the angle of use washers with beveled surfaces.The disadvantage of the device, it should be noted that before the operation plate it might be necessary to bend in accordance with the curvature of the spine with the help of a special device. Great inconvenience is a setting beveled washers. The device does not provide the opportunity to provide a smooth dosed reclinate using ANCP. In addition, massive head screws prevent the laying plate directly to the bow (the"dead space"), and the ends of the threaded rods with conical washers and nuts are also not deep enough under the skin.The invention consists in the combination of essential features, sufficient to achieve the desired technical result - the reduction of trauma intervention and improved outcomes.The essence is that the plate consists of three departments, located at obtuse angles relative to the adjacent, while each Department has a through opening in its cylindrical part n is poverhnosti plate hole acquires a spherical shape, and opens on the surface of the conically advanced, the bone screws have a spherical head, which along the axis of the screw and diametrically its threaded part, made a hole with a thread corresponding to the threaded end of the rod, bearing on himself cylindrical nut with a lobed Corolla, the peripheral end of the rod has the flats, and the screw collar set collar nut with a cylindrical protrusion corresponding to the diameter of the cylindrical portion of the orifice plate, which, in turn, made axial tapered channel that acquires a spherical shape, return the head of the bone screw.The execution of the heads of the screws spherical shape gives you the opportunity to reject the threaded part (the axis of the screw) in any direction within the spherical angle, the center of which is the center of the head.Spherical head allows you to reject the propeller axis at a greater angle than other forms of heads.Dive head into the thickness of the plate helps to lay it directly on the bow, which eliminates the "dead space".Rigid threaded connection of the rod with the cylinder and with the use of locknuts provides the possibility dosed reclinate body handicapped the most of the illustrations where in Fig. 1 shows a General view of the device from the side, Fig. 2 is a cross section through the elements of movement and fixation screws.Plate 1 consisting of three divisions located in relation to each other at an obtuse angle has a through hole 2, starting on the outer surface and an opening on the inside. At the outer surface of the hole 2 is framed by a collar 3, bearing a carving on the surface. Toward the inner surface of the plate 1 hole 2 having a cylindrical shape becomes spherical and opens on the inner surface of the conical extension 4. On the collar 3 posted by cap nut 5 with a cylindrical protrusion 6, placed in the cylindrical part of the hole 2. In a cylindrical flange 6 are axial tapered channel 7, acquires a spherical shape 8. The screw 9 is equipped with a spherical head 10, the diameter of the spherical part of the channel 8, and on top of the head 10 threaded hole 11. In this hole planted threaded end 12 of the rod 13 with the peripheral end of the flats 14. On the threaded end 12 of the rod 13 is placed a cylindrical lock nut 15 with faceted rim 16. In Fig. 1, the dashed line shows the amplitude of the deflection axis of the screw 9 in the cone). The device is manufactured in three sizes.The device is used as follows.Naked spinous processes of damaged and at least two up - and underlying vertebrae. Sceletium soft tissue from the spinous processes and adjacent to dujkovic departments. In the through hole 2 of the plate 1 from the outside enter the screws 9 are rigidly connected to the rod 13 by means of nuts 15, transpedicular screwed them into the body of the vertebrae to dive the spherical head 10 in the spherical portion of the hole 2. Plate 1 is installed on both sides of the spinous processes so that the through holes 2 is situated above the arches of the vertebrae. On the collar 3 nazhivljajut the cap nut 5, are reclinate, upon completion of which a coupling nut 5 is fixed with the achieved position. Loosening the lock nut 15, the latter together with the rod 13 is removed.In the case of the implementation dosed reclinate using ANCP cap nut, leave loose. Epithelial tissue is sutured, leaving the outside ends of the rods 13, which are fixed on ANF. At the end of reclinate through microincision reach the cap nut 5, loosen the lock nut 15 and with it izvlechutsya implants. - France.2. Internal transpedicular the latch of the spine. The prospectus of the company "Mediatech". - Belarus, Minsk.3. Steffee, A. et al. Clin. Ortop. in 1986, vol. 203, p. 45-54.0 The latch of the spine that contains a plate with holes, the bone screws with elements of their movement and fixation, characterized in that the plate comprises three departments located at obtuse angles to the adjacent, while each Department has a through hole opening of the cylindrical part of the outer surface plate and framed by a collar threaded on its periphery and toward the inner surface of the plate hole acquires a spherical shape, and opens on the surface of the conically expanded, bone screws have a spherical head, which along the axis of the screw and diametrically its threaded part made the hole with thread, the corresponding threaded end of the rod bearing on the cylindrical nut with a lobed Corolla, the peripheral end of the rod has the flats, and the screw collar set collar nut with a cylindrical protrusion corresponding to the diameter of the cylindrical portion of the orifice plate, which is made of an axial conical channel, purchase
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.
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.
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.
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