METHOD FOR TRANSOSSEOUS OSTEOSYNTHESIS OF SHIN BONES Russian patent published in 2009 - IPC A61B17/58 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to traumatology and orthopaedics. Pins are delivered through metaphyseal parts of shin bone above and below a fracture level with installing a ring apparatus. In applying a transosseous apparatus, a proximal ring is arranged eccentrically to the long axis of shin bone and so that semiring junction is matched with external side of shin bone, while the distance (L₁) from anterior surface of bone to internal part of the ring is 2.5 cm. Pins are delivered to ensure decussation behind shin bones through channels of conductors inserted into apertures of the ring in corridor positions 8' and 10.5'; the pin from a position 8' is delivered through head of fibular bone. Pre-assembled Ilizarov's apparatus is attached to the ring. The distal ring is provided within distal metaphysis of shin bone at a distance L₃=L₁+0.3 cm on anterior surface of shin bone, and on internal surface of shin at a distance L₄=L₂+0.3 cm, where: L₂=4+0.5 cm is a distance from middle surface of shin bone to the ring on internal surface of shin. The pins inserted into apertures of the ring in positions 8' and 10' are delivered through the channels of conductors. The tension pins are fixed in the ring. Pre-reposition of shin bone fragments is performed by distraction of fragments, and final reposition is carried out with a reposition knot provided with rods inserted into fragments in corridor positions of shin 1-2. Parafracture rings are connected with telescopic rods at least for one month in any fracture type. Then conditions are created to ensure free sliding of the telescopic rod in the tube along the long axis of shin in cyclic limb load.

EFFECT: method provides elimination of fragment displacement in front plane during reposition and treatment, reduced intraoperative labour input and time for apparatus application, higher accuracy and safety of pin delivering on the conductor through regions with the least muscular mass, reduced number of recurrences and reduced treatment time.

7 dwg, 1 ex