A device for correction of spinal deformities
(57) Abstract:The invention relates to medicine, namely to traumatology and orthopedics, and can be used in surgical treatment of spinal deformities. The grips of the device are rigidly fixed to each other with screws and notches. The main capture contains a ball bearing connected with andcollection. The technical result consists in the elimination of spinal deformity in patients with incomplete growth and systemic disease of the skeleton characterized by delayed maturation of bone tissue. 1 Il. The invention relates to medicine, namely to traumatology and orthopedics, and can be used in surgical treatment of spinal deformities.The known device for the treatment of spinal deformities /auth.St. N 1650120, And 61 In 17/60, Gorbunov T. C. et al; ed.St. N 1690732, And 61 In 17/60, Pavlenko N. N. et al./, based on the principle of distraction using andconnector with two points of support, permanently installed on the spine. Their design does not allow their use in the treatment of patients with incomplete growth, as well as patients with systemic pathology of the skeleton.Swuh distraction rods, coupled with a hinge. The hinge consists of two lugs connected to a single axis, and the ends of the eyelets made reference sites, one of which is perpendicular to the axis of the housing, and the second at an angle open towards the kyphosis.The device facilitates uniform distribution of load on the spine in the treatment of kyphoscoliosis and allows you to make corrections in different planes. However, the device has two points of support, which distributed the load correction that does not allow its use in patients with incomplete growth due to insufficient strength of the supporting bone structures.Closest to the claimed is a device for correction of spinal /auth. St. N 1627157, And 61 In 17/60, fishchenko P. J. et al./ The device has more than two points of support on the spine, has mobility on the level of the main hook in the same plane through the keyholes for flexible connection with the bracket. The design features allow dynamic correction with the growth of the patient.General characteristics of the prototype with the claimed invention:
1). polysegmental installation of the support structure elements /mnozhestvenoe design.The disadvantages of this design include:
1) lack of rigidity of the support structure elements among themselves, that may be the cause of unstable fixation device;
2) direct shear type of mobility supporting elements of the structure, limiting its installation and adaptation of andconnector to change the spatial position of the spine.The objective of the invention is the elimination of spinal deformity in patients with incomplete growth and systemic disease of the skeleton characterized by delayed maturation of bone tissue.The problem is solved due to the fact that the body is resilient flat spring rigidly gripping the rail between the cranial end of the rail is made of a ball support mounted in the Central cranial capture, on the plane of the Central cranial capture are auxiliary cranial clamps, the articulated surface made in the form of notches, they are rigidly fixed to each other by screws, on a rack housing is located caudal capture, fixed to the rail nut.The technical result is achieved by the fact that cranial notches. The Central grip contains a ball bearing connected with andcollection. Thus, the axial loads resulting from andconnector, distributed on 3 points of support, which greatly reduces the chance of fracture of the supporting bone structures. A connection cranial mount unit with andcollection through a ball bearing allows you to set the device on the spine for almost any strain.The drawing shows a diagram of the proposed device, which consists of the response of the toothed profile of the rack 5 and the rack 6 housing 7. In the housing 7 is resilient flat spring 8, tightly gripping the rails 5 and 6 to each other. The cranial end of the slats 5 are made ball support 4 mounted in the Central cranial grip 3. On the plane of the Central cranial capture 3 are auxiliary cranial clamps 1, the articulated surface made in the form of notches, and rigidly fixed thereto by the screws 2. On a rack housing 6 is located caudal capture 9, fixed to the rail 6 by a nut 10.The device operates as follows: the patient is placed on an orthopedic table in position on the abdomen. the deposits. The lower limb is fixed to a special consoles orthopedic table for traction. After processing the back with iodine and alcohol perform incision of the skin over the spinous processes throughout the deformation. Skeletonize the posterior elements of the vertebrae on the concave side. Auxiliary cranial grips 1 set under the lower articular process neutral and 1 segment of the lower vertebrae. Central cranial grip with ball joint and andcollection Assembly installed under the articular process of the vertebra between the auxiliary grips with this Central 3 and 1 auxiliary grippers, the articulated surface made in the form of notches, is rigidly connected by screws 2. By squeezing the resilient flat spring 8 slats 5 and 6 move relative to each other until the total length of the device becomes minimum. On a neutral lumbar vertebra establish caudal capture 9, is inserted into the aperture of the caudal end of the rail 6 and fix their nut 10. Special tool make moving gear racks 5 and 6 relative to each other to increase the overall length of the structure. Then the employee who is not participating operator special tool produces additional moving gear racks 6 and 5 relative to each other to tension elastic tissue, if this gets an additional correction of spinal deformity. Perform a careful hemostasis, the wound was sutured in layers to drainage, skin impose cosmetic seam.Clinical example: patient R. L., 10 years, hospitalized in the Department of pediatric orthopedics city hospital # 7, Komsomolsk-on-Amur 8.09.95, surgical treatment regarding progressive scoliotic deformation of 3 degrees. Diagnosis at admission: progressive dysplastic compensated right thoracic scoliosis of 3 degrees. The Central angle of the main arc was 41oaccording to Cobb.After a preliminary examination and postoperative preparation 29.09.95, performed surgery: correction of spinal deformity of the proposed device. The patient laid on orthopedic surgical table in position on the abdomen. In the armpit installed special stops. The lower extremity is fixed to the traction devices operating table. After treatment the skin back a solution of iodine and alcohol made the incision of the skin over the spinous processes from the level of T2to the level of L5. Skeletonema the posterior elements of the vertebrae on the concave side. Installed cranial somaly cranial grip with ball joint and andcollection Assembly installed under the articular process of the vertebra between the auxiliary grippers, Central 3 and 1 auxiliary grippers, the articulated surface made in the form of notches, is rigidly connected by screws 2. By squeezing the resilient flat spring 8 slats 5 and 6 are displaced relative to each other as long as the total length of the device was not minimal. On a neutral lumbar vertebra installed caudal grip 9 in his hole inserted caudal end of the rail 6, the latter is fixed by a nut 10. Special tool rack 5 and 6 are displaced relative to each other with increasing length of the structure. Then the employee who is not directly involved in the operation of the traction devices operating table made traction patient's lower limbs, at this time, we were moving gear racks 5 and 6 relative to each other by a special tool to elastic tension of the tissues, with the resulting additional correction of spinal deformity. Made a careful hemostasis, the wound was sutured in layers to drainage, skin cosmetic suture.On the control radiographs in the postoperative period, the Central angle of the main arc was 20oaccording to Cobb (correction of more than 50%).
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