RU2319467C2 - Rod apparatus for intraosseous ostheosynthesis - Google Patents

Abstract

FIELD: medicine; traumatology; orthopedics.

SUBSTANCE: rod apparatus for intraosseous ostheosynthesis has arcs with openings, threaded beams to connect arcs together, repositioning members made in form of armpieces equipped with intraosseous rods; armpieces are fixed at arcs. Apparatus is provided with repositioning units made in form of threaded rod with universal hinge, which form fixing unit and unit for fixing intraosseous rod; rest bolt is used for stabilization of mentioned units. Intraosseous rods are capable of rotational and axial shifts; they can be fixed by nuts. Fixing unit is placed for shifts; it can be fixed by nuts. Threaded ends of repositioning members are mounted in openings of armpieces disposed onto internal surfaces of apparatus' arcs.

EFFECT: reduced traumatism; improved repositioning qualities of apparatus; higher efficiency of operation.

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Description

The invention relates to medicine, is used in traumatology orthopedics for transosseous osteosynthesis of long tubular bones.

There are various devices used for this purpose, in particular the device most widely used abroad [1] for transosseous osteosynthesis. However, it has the following disadvantages: when the support pins are inserted into the bone fragments, the pins must be installed strictly parallel to each other with certain distances in terms of clamp size. In this case, technical difficulties arise associated with the installation of the apparatus, and the duration of the operation is extended.

The rod analogue of transosseous osteosynthesis of VVFurdyuk can serve as another analogue [2]. The disadvantages of this apparatus is the design complexity, as a result of which there are difficulties in combining the threaded bushings of the fixation and reposition units located on the same axis on opposite sides of the apparatus. The famous apparatus of V. Furdyuk [3] for transosseous osteosynthesis of long tubular bones, which includes an elongated frame with slots, on the parallel walls of which there are reposition and fixation nodes. In this case, the reposition units are made in the form of sliders with spacer threaded bushings and displacement nuts on the bodies of the sliders. Also, the disadvantage of this device is the technical complexity of the design that occurs when installing the device.

Known apparatus Kupkenova D.E. [4], which is equipped with reponentive nodes, each of which is made in the form of a threaded rod with a cylindrical middle part of a large diameter, on the surface of which there are parallel flats connected by a through hole extending perpendicular to their axis. The disadvantage of this apparatus is the holding of transosseous rods strictly perpendicular to the axis of the bone. Closest in technical solution to the claimed one is the Volkov-Hovhannisyan compression-distraction apparatus [5] adopted by us for the prototype for the reduction and osteosynthesis of long tubular bones. The apparatus includes brackets mounted on supporting bolts and connected by two side distractors and with special fixators. However, despite the advantage of this device compared to the above counterparts, it, in turn, also has a number of disadvantages. The device is bulky, which causes significant inconvenience to the patient. In addition, the operation is quite laborious, since the side distractors of the prototype apparatus are used during the operation only as reponators. The final fixation is carried out by connecting the brackets with threaded bolts, after which the side distractors are removed.

The essence of the invention lies in the combination of essential features sufficient to achieve the desired technical result, namely, to reduce the invasiveness of the operation, its simplification, improve the repositional qualities of the apparatus, which increase the efficiency of surgical treatment.

This essence lies in the fact that the rod apparatus for transosseous osteosynthesis, containing arcs with holes, threaded rods connecting arcs, reponing elements made in the form of brackets equipped with transosseous rods and fixed on arcs, characterized in that it is equipped with reponent nodes each made in the form of a threaded rod with a universal hinge that forms a fastening block and a block for fixing the transosseous rod, and a locking bolt for stabilizing the said blocks, nye rods have the possibility of rotational and axial displacement and locking nuts, fastening unit is arranged movably and fixing nuts and threaded ends repositioned in units installed in the bracket holes, placed on the inner surfaces of the apparatus arcs.

The adjustable arrangement of the threaded rods with the attachment unit and the fixation unit in the form of a universal joint passing through their holes of the transosseous rods provide, after preliminary elimination of rotational displacements, an absolutely accurate closed reposition of bone fragments in these planes. The attached drawing shows a core apparatus for transosseous osteosynthesis.

Rod apparatus for transosseous osteosynthesis, containing arcs 1 with holes, interconnected by threaded rods 2. On brackets 3 mounted on the outer surfaces of the arcs 1, transosseous rods are placed 4. On the inner surfaces of the arcs 1 on the brackets 5 are installed reponentive nodes 6. Reponent elements made in the form of brackets fixed on arcs and equipped with transosseous rods, are installed with the possibility of movement and fixing with nuts. The threaded ends of the reponentation nodes 6 are placed with the possibility of movement and fixing by nuts 7 in the holes of the brackets 5. On the threaded rods 12 are mounted blocks of fastening 8 and fixing 9 transosseous rod 10 in the form of a universal joint. The mounting unit and the fixing unit is stabilized by a locking bolt 11. The working parts of the transosseous rods in the drawing are immersed in bone models.

The apparatus is used as follows: after eliminating the rotational displacement of the fragments, the trocar is inserted to the bone through micro-incision, the stylet is removed, a channel is drilled through the tube to insert the transosseous rod 4 through both cortical layers. The transosseous rod 4 is fixed to the arch 1 using the bracket 3. Similarly, the transosseous rod 4 is mounted on another bone fragment. A second pair of transosseous rods 10 are inserted closer to the fracture line. They are mounted reponentia nodes 6, putting them on the holes located in the fixing blocks 9, and fixed with nuts 7. The reponent nodes 6 by means of brackets 5 are fixed to the inner surface of the arcs 1. Arcs 1 are connected to each other by means of threaded rods 2. Under X-ray control, reposition by moving the elements of the repair nodes 6 with nuts in perpendicular directions, i.e. directly manipulating their threaded rods and transosseous rods 10. If the bone fragments are correctly positioned, they are brought closer to the compression by means of threaded rods 2 connecting the arcs 1. To stabilize the achieved reposition, an additional transosseous rod is introduced into each fragment at an angle of 60 degrees to its axis and transosseous rods 4 are fixed to the arcs using the brackets 3 on the outer surface of the arcs 1.

Information sources

1. Swiss patent No. 0684928, cl. A61B 17/60, 1995.

2. Furdyuk V.V. A.S. No. 1766390, A61B 17/60, 1993.

3. Furdyuk VV RU 2152190 C1, A61B 17/66, 09/23/1998.

4. Kupkenov D.E. RU 2272593 C2, A61B 17/66, 2006.

5. Tkachenko S.S. "Osteosynthesis". L., Medicine, 1987.- p. 122-123.

Claims (1)

The rod apparatus for transosseous osteosynthesis, containing arcs with holes, threaded rods connecting arcs, reponent elements made in the form of brackets equipped with transosseous rods and fixed on arcs, characterized in that it is equipped with reponent nodes made in the form of a threaded rod with a universal hinge, which is formed by the fastening block and the block of fixation of the transosseous rod, and a locking bolt to stabilize the said blocks, transosseous rods have the ability to rotate of axial and axial movements and fixing with nuts, the block and fasteners are placed with the possibility of movement and fixing with nuts, and the threaded ends of the reparation units are installed in the holes of the brackets located on the inner surfaces of the arcs of the apparatus.