Surgery – Instruments – Orthopedic instrumentation
Reexamination Certificate
2002-09-12
2004-06-29
O'Connor, Cary E. (Department: 3732)
Surgery
Instruments
Orthopedic instrumentation
C606S064000, C606S057000, C606S059000
Reexamination Certificate
active
06755828
ABSTRACT:
FIELD OF THE INVENTION
The invention refers to the field of medicine, specifically to that of orthopaedics and, and exactly to spinal surgery, and is used for treatment of diseases and injuries of the spine in specialized departments of vertebrology and neurosurgery.
DESCRIPTION OF THE PRIOR ART
An implanted device for spinal fixation is known, comprising a screw for spongy bone bearing an improved saddle-shaped configuration fixed in a place with a nut and comprising a simple and effective locking mechanism having some pins, each of them contacts with an upper half-saddle and a nut to prevent rotation of the latter with respect to the rest of the configuration. The implanted system also comprises rods, rigidly caught by the saddle-shaped configuration and a sublaminar wire, where the rod/wire interface is protected with a wire tread (U.S. Pat. No. 5,030,220. IPC
5
A 61 F 5/04, A 61 F 5/00).
A rod screw is known as well as a device for correction and fixation with that kind of a screw, in which the rod screw has a threaded part and a spherical segment or a head, on the latter a packing is set with a connecting element to set a rod, and the connecting element and the packing are connected with each other in such a way, that the distance between its end and the connecting element can be changed (International Application N WO 91/06254. IPC
5
A 61 B 17/60).
A device for spinal treatment is known, comprising junctions of vertebral fixation with curved needles, connected by straight screws with each other, and two units, which are connected with central plates, on which straight needles are fastened with the help of plates held down and screws (Author Certificate/A.c./1537237, A 2, USSR. IPC
5
A 61 B 17/60). In the known device the central plates are made as a semicircle, supplied with holes and cut-outs. Moreover, vertebral fixation is performed using curved needles inserted into the spinous process and straight needles inserted into vertebral body.
A technique of modeling closed insertion of fixators into the vertebral body is known, comprising its stabilization by insertion of wire-markers in the spinous process in the middle sagittal plane, after that, displacing from it at first in the cranial and then in the lateral direction the fixators are inserted into safe zones from backward forward at an angle to the sagittal plane, and their direction is marked on a template, which is then used during insertion of the fixators (U.S. Pat. No. 2,093,901, C1, RF).
A technique for insertion of a threaded rod in vertebral body is known as well as a device for this implementation (U.S. Pat. No. 2,051,633, C1, RF). The essence of the invention is in pre-insertion of a guiding axial wire, a guide with a central longitudinal hole, a protective tube, with the help of which protection of soft tissues is made, direction and depth of the threaded rod implantation are controlled, for this a device for osteosynthesis is used provided with a rotation mechanism as a case, including a ratchet with a lock, a quadrangular jack with a ball fixator on one end and a handle with circular recesses, set on the opposite end perpendicular to the case.
A compression-distraction device is known, including rings and arches, wire fixators, tie screws, spherical hinges, fixing elements, in which each pair of the tie screws is connected by the spherical hinge, and the rings and arches are set at a regulated distance from the plane of the hinge arrangement (A.c.374076, USSR).
A device for fixation and correction of the spine is known, comprising threaded rods and a base, provided with lever ties (U.S. Pat. No. 2,019,148, C1, RF). There are longitudinal threaded bars in the known device, each of them is made being consisted of three parts, connected with each other by hinges and provided with rod holders as a cylinder with a fixing element and a slot, thereby the parts provide multi-planar transport of the threaded rods.
A device for treatment of spinal curvatures is known, in which two support junctions are connected with each other by a reposition junction, using threaded rods of distractors (A. c. 1781872, A 1, USSR). The reposition junction has two cross-pieces, connected with each other by hinges and with the help of rods respectively with plates. A shackle with a stud is set on one of the threaded rods; a flexible traction, fixed to the spine in the apex of the curvature, is attached in the transverse hole.
A device for treatment of scoliosis is known, comprising staples with holes and a slot, attached to them support elements and fixation elements, in which one of the staple ends is deviated along the plane to its convex side, a fixing plate with L-reversed section is arranged on the staple with the possibility of its transport along the slot and fixation; a slider is on one of its wall, it is sunk into the staple slot and becomes an axle, in the top of which, in its turn, a threaded pole is made, and a slot, parallel with the staple plane, is made in the other wall of the fixing plate, a tractor is set by hinges on the axle of the fixing plate, its threaded end is attached to the deviated end of the staple through a face support, bone rods and clips are in the slots of the fixing plates with the possibility of transport and fixation, the latter consist of two arched plates with tenons, connected by a tie bolt at their base, and the staples are connected with each other with the possibility of their interlocation change and fixation by use of hinge bars (U.S. Pat. No. 2,086,202, C 1, RF).
A device and a technique for spinal extrafocal osteosynthesis are known, the device comprises threaded rods, support elements, screw tractions and fixing elements, the support elements in the device are made as arched plates with curvature radius 140±10 mm and longitudinal slots, in which the threaded rods are fastened perpendicular to the plane of the support plate, the threaded rods are to be inserted in vertebral bodies, free movements are made within 30°-range with respect to the support plate at the expense of compensatory washers, the support elements have free movements within 60°-range and are connected with each other by posts with the compensatory washers and the longitudinal screw tractions in two parallel planes. In the technique of spine extrafocal osteosynthesis by transpedicular insertion of the threaded rods in bodies of some adjacent intact vertebrae with attachment to the external support transpedicular fixation is supplemented by fixation of spinous process, in an involved vertebra the rods are inserted directly in the body, omitting the arch, and two adjacent vertebrae are fixed by a single support plate, for example, the involved vertebra and the one below, thereby creating repositional moment of forces at the level of the most involved spinal motor segment (Application N 96113284/14, A, RF, Publ. 10.27.1998.).
ESSF device is known, which has transverse beams, made integral and provided with apertures to set ball hinges with lock screws (Weber B. G., Magenl F. The external fixator. AO/ASIF—Thread Rod System Spine—Fixator. Berlin: Springer-Verlag, 1985.—P. 298-300). The transverse beams are connected with each other by threaded rods and the ball hinges. All the threaded rods have antirotational thread. In the device Schanz screws are used, which are connected by the transverse beams, using screw clamps. Slots, made in the transverse beams, give the possibility to change transverse distance of the Schanz screws.
However, the design of the device mentioned above doesn't allow to correct spinal deformities and exactly scoliosis of Grade III-IV, because setting the ball hinges in the transverse beam apertures limits its use versatility due to absence of the possibility of setting ball hinges, oriented to the deformity apex.
A device is known for infusion of medication solutions into bone and soft tissues, comprising a case with a tubular needle, a union for solution feeding in and a mandrin with a cone plug and a handle, set with the possibility of rotation around the axis, a longitudinal groove a
Khoudiaev Alexander Timofeevich
Kovalenko Pavel Ivanovich
Shevtsov Vladimir Ivanovich
Melson Candice C.
O'Connor Cary E.
Rothwell, Figg Ernst & Manbeck, PC
Russian Ilizarov Scientific Center
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