The invention relates to medicine, in particular of traumatology and orthopedics. The invention provides increase the stability of the structure as a whole and the strength of “weak” areas and reduce the likelihood of deformation or destruction of the structure elements ahead of time necessary for complete rehabilitation of the patient. Transpedicular latch contains screws, longitudinal rods and two transverse rods that are interconnected. In the screw head made a hole under the longitudinal rod. The hole in the screw has a slotted cuts. The longitudinal rod is made along the edges of the slotted cutting. Both of the transverse rod are threaded and connected to the longitudinal rods with clamps with nut elements. The clamps made two holes, one of which is threaded. The screws are fixed with longitudinal rods through a prolonged screws. 2 C.p. f-crystals, 1 Il.
The invention relates to medicine, in particular of traumatology and orthopedics. The latch is designed for fixation of adjacent vertebrae is damaged, which is necessary for the formation of a solid block locked vertebrae, in case the of cracks.
Known transpedicular tabs firm Medtronic Sofamor Danec containing screws, longitudinal steering, transverse rod, the locking screws. Design retainer firm Medtronic does not fully meet the requirements of the pins and implants. So the possibility of rotation of the screw in the hub connection with a longitudinal rod, illustrated prospectus radius of rotation, may adversely impact the rehabilitation process. Also not exclude the possibility of rotating the screw about the axis of the longitudinal rod. With regard to the transverse rod, he made a very massive that jeopardizes one of the first rules of trauma - "minimum intervention in the human body". The threads on the screws are made throughout the screw, until the sections close to the nodal connection with a longitudinal rod, and it is this section of the screw is the most loaded.
Known transpedicular tabs Usikov C. D. containing screws, longitudinal bars, transverse plate. Longitudinal rods copyright clamps Usikov Century. Etc. are weakened from the point of view of mechanics, because they have cuts around the circumference, which may lead to microcracks and reduces the stability of the structure, and having a single transverse plate does not lead to a high increase in the rigidity of the whole construction.
Known latch containing the screws, the longitudinal rods and two transverse rods that are interconnected in the screw head made a hole under the longitudinal rod (U.S. Pat. 5702392 USA, IPC7And 61 In 17/70, publ. 1997).
The lack of threads in the transverse rods rigid fastening of the longitudinal and transverse rods increases the probability of failure of structural elements.
The task, which is aimed by the invention, is the creation of the clamp, ensuring stabilization of the damaged area of the spine to the time required for complete rehabilitation of the patient and does not require additional external immobilization.
When carrying out the invention the problem is solved at the expense of achieving a technical result, which is to increase the rigidity on the "weak" areas and to eliminate the stress, thus decreasing the probability of failure of structural elements. This is achieved by changing the geometric characteristics of transpedicular latch and the location of the individual elementclassname the latch, containing screws, longitudinal rods and two transverse rods that are interconnected, and the screw head made a hole under the longitudinal rod, the feature is that the hole in the screw has a slotted cuts, and the longitudinal rod is made along the edges of the slotted cuts, both of the transverse rod are threaded and connected to the longitudinal rods with clamps with nut elements, clamps made two holes, one of which is threaded, the screws are fixed with longitudinal rods through a prolonged screws. Moreover, the profile of the spline has a triangular shape, and the latch has four valve element.
Between the claimed technical result and essential features of the invention have the following cause-and-effect relationship. Both of the transverse rod are threaded throughout and are connected by longitudinal rods with clamps, which has two holes. In one of the holes of the clip threaded, which reduces the required number of valve elements twice, from 8 to 4 pieces In these openings are transverse rods. The clamp is clamped with the aid of wrench elements.
As a result, when received the data of the structural elements relative to each other, achieved a high increase in the rigidity of the design on the "weak" areas. Eliminated the stress concentrators described above, resulting in a reduced probability of failure of structural elements.
Slotted screw connection with a longitudinal rod completely eliminates the possibility of rotating the screw 1 around the longitudinal axis of the rod. Profile spline has a triangular shape, resulting in a dense planting details.
The execution of the screws in the sections close to the nodal connection with the rod, in the form of a bucket with a smooth release of the full thread can significantly reduce the stress concentration in the most loaded sections of the screws. The radius of the bucket 20 mm, which increases the strength of the screw.
All components are made from titanium alloy.
The presence of two transverse rods allows you to form a closed loop, which significantly increases the rigidity of the structure as a whole and reduces the load on the longitudinal rods. At the same time on both the transverse rods thread made throughout their length.
The location of the transverse rods as close to the top and bottom screws, respectively, reduces the strain on the longitudinal sternradio, allows rigid fixation of the longitudinal and transverse rods relative to each other.
The invention is illustrated in the drawing, which shows the latch Assembly.
In the clip containing the screws 1, the longitudinal rods 2, the transverse rods 3, the clamps 4, locking screw 5 and nut elements 6 in the screw head 1 has a hole having a slotted cuts, while the screw 1 in the sections close to the nodal connection with longitudinal rod 2 made in the form of fillets, having a radius of curvature of 20 mm, in addition, the screw 1 has a smooth release of the full thread. The longitudinal rods 2 are also slotted cutting edges. The transverse rods 3 are threaded the entire length. The clamp includes a clamp 4, each of which has a series of holes, and in one of them threaded, locking screw 5 and nut elements 6. All components are made from titanium alloy.
The latch set as follows. In the vertebrae adjacent to the damaged, enter the two screws 1. On the longitudinal rods 2 install two clamp 4. After that, the longitudinal rods 2 are installed in the screw holes 1. Due to the protracted screws 5 is achieved by rigid fastening of the screw 1 with a longitudinal rod 2, and in this moment of achievement is around the longitudinal axis of the rod 2. The transverse rod 3 is screwed into the clamp 4 and fix the longitudinal rod 2 with the cross rod 3 is as close as possible to the top and bottom screws 1, respectively, to the extent which allows the human anatomy, with the help of wrench elements 6. Thus formed 2 longitudinal and transverse 3 terminals, closed loop significantly increases the strength of the structure as a whole and reduces the load on the longitudinal rods 2.
As a result, a metal structure is able to fix the damaged area of the spine for the entire period of rehabilitation including mutual arrangement of the vertebrae relative to each other, which it deems necessary traumatologist.
Sources of information
1. Mikhailovsky, M. C., N. Fomichev.G. Surgery of spinal deformity. - Novosibirsk: Sib. Univ. in, 2002. S. 322.
2. Antennae C. D. Device for peliculasporno reposition and fixation Grodno-lumbar-sacral spine: leaflet // Medical technologies in Russia. 4C.
3. Pat. 5702392 USA, IPC7And 61 In 17/70, publ. 1997 (prototype).
1. Transpedicular the latch containing the screws, the longitudinal rods and two transverse ster fact, the hole in the screw has a slotted cuts, and the longitudinal rod is made along the edges of the slotted cuts, both of the transverse rod are threaded and connected to the longitudinal rods with clamps with nut elements, clamps made two holes, one of which is threaded, the screws are fixed with longitudinal rods through a prolonged screws.
2. The latch on p. 1, characterized in that the profile of the spline has a triangular shape.
3. The latch on p. 1, characterized in that it has four valve element.
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