Device for longitudinal connecting rods
The invention relates to medical equipment, namely to devices used for segmental extension rods andcorrective used instrumental correction of deformity and stabilization of the spine. The invention improves the efficiency of surgical treatment, reduction of length of stay in hospital and the risk of complications due to ease of installation, increased rigidity and reliability of fixation. The device has an eccentric connected with the locking bolt in its thick wall, the locking rods end to end. On the edge of the thin side of the eccentric couplings includes a reinforcing collar. The locking bolts protrude into the lumen of the clutch cones and placed in the wells of conical shape, made in the rods. 1 Il.
The invention relates to medical equipment, namely to devices used for segmental extension rods andcorrective used instrumental correction of deformity and stabilize the spine.
A device for segmental increase rod length distractor [USSR Author's certificate No. 1219070 a And 61 In 17/60, 1973], the and abutting the end of one rod and a sleeve with an open groove G - shaped under the above ledge for abutting the other end.
This device is not designed for rigid fixation, therefore, remains a rotational movement between the joined rods within the lower knee of the l-shaped groove, which leads to instability and the emergence of pseudoarthrosis. The castle system is efficient in terms of distraction, but in the course of contractions can occur undocking design in place of fixation, which can lead to pseudoarthrosis and loss of correction. Connection of this device in the wound is complex, requires significant effort and additional manipulation that increases the invasiveness of surgery.
The closest to the essence of the technical solution is a device used in the system Cotrel Dubousset Instrumentation (CDI) “Horizon”, consisting of two rods, the fixed end to the eccentric coupling with four fixing bolts in her colon wall [Dubousset J. C-D Horizon: A New Cotrel - Dubousset Instrumentation. //Spine, 2000, V. 25, No. 6S, P. 86S].
Despite the fact that the device uses four such bolts, under the influence of Omni-directional cyclic loading fatigue failure occurs vertices of the cones fixing bolts while the thin edge of the eccentric coupling resultatives rods. is niania bolts, which leads to instability, pseudoarthrosis and loss of correction.
The present invention is to improve the efficiency of surgical treatment, reduction of length of stay in hospital and the risk of complications due to the ease of installation of the device, increase the toughness and reliability of fixation rods.
When the task has positive therapeutic and socio-economic effect in reducing the length of hospitalization, the rejection of external immobilization, reducing cases of morbidity and duration of stay on disability, which promotes the most rapid and complete social adaptation of patients.
The technical result is achieved due to the fact that you are using the eccentric sleeve, the ends of which at the edge of the semicircle of the thin wall formed by the shoulder, increasing the strength properties of the thinned region and preventing reswallowing rod. Conical holes on the surface of the bars increase rigidity and reliability of fixing bolts due to the fact that the entire cone locking bolt into a hole, therefore, counteracts the destructive forces is not the top of the cone, and the cone from the apex to the by the collar, on rods made holes conical shape corresponding to the location, protruding into the lumen of the clutch cones fixing bolts.
The invention is illustrated graphic material, where the drawing shows a General view of the device in the assembled state. The device consists of an eccentric coupling 2 with a reinforcing collar 7, which is located on the edge of its thin wall 4. In the coupling inserted two rods 1 with two tapered holes 6 in each. Through the screw holes in the thick wall of the clutch 5 four twisted the locking bolt 3, the cone 8 from the apex to the base is immersed in the conical hole of the rods.
The device is used as follows. Known methods provide access to the rear spine. The locking bolts are fully vivencial from the clutch. After installation of the base-locking elements and commit to them the cranial and caudal rods on the free end of one of the rods put on the clutch, so that the end of the rod held out of her holes on 1 see the Free rod capture customerdataset type “crocodile” at 3 cm from its end. A similar tool grab the clutch. By force the ends of the rods compare the end-to-end. When help is O. Movement of the coupling along the axis of the rods terminate when their ends reach the middle of the length of the coupling. By using the electric drill and drill appropriate diameter through the screw holes of the coupling rods form a conical hole. The locking bolt is screwed in the screw holes and tighten with wrench. Installation complete, the wound is sutured in layers, leaving the active drainage.
Device for longitudinal connecting rods andconnector spine, containing an eccentric connected with the locking bolt in its thick wall of the locking rods end-to-end, characterized in that the edge of the thin side of the eccentric couplings includes a reinforcing collar fixing bolts protrude into the lumen of the clutch cones and placed in the wells of conical shape, made in the rods.
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