The latch of the spine

 

(57) Abstract:

The inventive retainer spine for the treatment of fractures with concomitant damage to the intervertebral discs, as well as fractures of the arms with offset and can be used for fractures of the bodies nijaguna and lumbar vertebrae with large wedge-shaped compression fragmented fractures of the vertebral body. On the inner surface of the plates made spikes. Plate bolts are fixed along the spinous processes of the vertebral bodies. The technical result consists in increasing the rigidity of fixation. 2 Il.

The invention relates to medicine, namely to traumatology and orthopedics and can be used for fractures of the bodies nijaguna and lumbar vertebrae with large wedge-shaped compression fragmented fractures of the vertebral body, with anterolateral compressors, fractures with concomitant damage to the intervertebral discs, as well as fractures of the arms with offset.

Known latch spine system Range, developed by doctors F. Lapel, and Missenard in 1987 in the clinic ARGO, Paris (C.'ARGENSON, P. M. SUBMITTER, J. LOSET, Z. G. NASR, F. de PERETTI, J. M. PUCH. The use of The C. D. modular construct -/2HS - l HS/ for fixation of comminuted fractures of the output terminals and couplers, to combine the screw screws into a single rigid structure. Do surgery under General anesthesia. Naked spinous processes and bow three vertebrae, damaged, and also upstream and downstream. The screws inserted into the vertebral body at the level of the roots of the bows on both sides under the control of the electro-optical Converter (EOC) in above - and underlying vertebrae. Then, using rods screws tightly connect with each other, thereby blocking the damaged vertebra. Sew up the wound. 3-4 weeks and allowed to walk without additional funds are committed.

The disadvantages of the known latch system DIAPASON are:

1. The risk of damage to the spinal cord and nerves, and also development is usually hard place osteomyelitis of the vertebral bodies.

2. The need to purchase expensive equipment (RSE), the difficulty of fixing and mounting clip.

3. The possibility of fracture of the screws loosening and razbaltyvaniya release.

The closest in technical essence and achieved a positive result is the release of the spine, namely plates Kaplan-Antonova, made of steel grade 1Chr 18Ni 10T [Kaplan A. C. Damage to bones and sustavov shoots. In the middle part of the plate is cut with a jumper in the center to increase rigidity. The slot required for the passage and movement of the clamping bolts that connect the plate using corrugated on one side of the rectangular washers and nuts.

Fixation of the spine is performed under General anesthesia. Spinous processes and the arms of the respective three vertebrae naked on the middle line and separate the periosteum. Special awl or drill bore through spinous processes of the vertebrae that are to be committed. On both sides of the spinous processes of the stack of metal plates. Through the lamina and spinous processes of missing bolts that screw up nuts. The wound is sewn together in layers. Patients begin to walk in 3 weeks, get therapy.

The disadvantages of the design are:

1. Not enough high rigidity of fixation associated with blocking only one of the above - and downstream relative to the damaged vertebrae, and also because of drilling with drilling holes in the spinous processes when the adjustment plates.

2. The inability fracture osteosynthesis above or downstream of the spinous process toward the broken posway resection of the pedicles of the vertebra at the clinic compression of the spinal cord especially against the backdrop of perelomova spine.

3. The backlash of the vertebral body at fracture of the spinous process, shackle or damaged articular processes of the vertebra.

4. Cutting bolts from the spinous processes or their razbaltyvaniya due to the perifocal bone resorption or excessive activity of patients, as well as against the background of age-related osteoporosis.

5. The necessity of skeletization processes and handles, as well as the formation of channels in the spinous processes with excessive trauma to tissue and lengthening of the time of the operation.

The positive result of the proposed release is to increase the rigidity of fixation and simplification techniques of osteosynthesis.

This is achieved by the fact that in the inventive design of the latch plate on the inner surface have a pyramidal spikes.

The figure 1 shows the design of the inventive latch, where a is the plate on the inner side, B - plate from the outside, In view of the latch side assembled.

The figure 2 shows the design of the release of the prototype, where a is the plate on the inner side, B - plate from the outside, In view of the latch side assembled.

The inventive retainer spine consists of a plate 1 Et (Fig.1.A) and on the inner side (Fig. 1. B) on its edges 4 groups of spines 2 arranged in two rows. The height of the studs 7 mm corresponds to the minimum thickness of the spinous processes at their base. The distance between the spikes is 10 mm, which is 1.5-2 times less than the minimum width of the spinous processes. The plates are made slot 3 jumper 4 in the Central part for the passage and movement of the bolts 5, which under the head have a corrugated washer 6, and at the end of the bolt wrapped around a grooved nut 7, the size of which is doubled to avoid cutting the thread.

Fixation of the spine using studded plates 1 is as follows. Under General anesthesia spinous processes 5-7 vertebrae reveal the midline separation of the periosteum. On both sides of the spinous processes of the set plate 1 2 spikes at the level of 2-3 above and the underlying spinous processes relative to the bone broken vertebra. Through the plate 1 and Majestie ligaments pass the bolts 5, which are screwing the nuts 7. Most of the thickness of the nut 7 can withstand the voltage without breaking the thread. The shift plates 1 achieve redistribution types 2 so that they match acanthas regardless of razmerchik 7 continue until a stable rigid fixation of the spine. The wound is sewn together in layers. Plaster immobilization is not required. Allow them to go through 2 weeks after the removal of stitches. Patients receive rehabilitation on General principles.

Thus, the advantage of this method is to fix the four contiguous with a broken vertebrae over the spinous processes at their base and at an end part that allows you to achieve greater rigidity of fixation. Fracture of one of the prongs in the middle and the end portion does not exclude its fixation spikes at the base. Two broken spinous processes also do not exclude the possibility of a stable fixing of the rear of the complex. There is no need for excessive skeletron processes and handles, as well as in pre-drilled spinous processes, which significantly reduces the time of surgery. The inventive design of the latch of the spine can increase the amount of fixed vertebrae.

The latch of the spine, consisting of plates that attach bolts along the spinous processes of the vertebral bodies, characterized in that on the inner surface of the plates made spikes.

 

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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.

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