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Anatomic basis for implantation of the Ilizarov system in the leg

Bases anatomiques pour l'implantation de l'appareil d'Ilizarov à la jambe

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Summary

Ilizarov's method of implanting an external circular fixator requires the placement of at least 8 transfixion pins. The neurovascular hazards and the need to leave the posterior and lateral compartments free motivated this study, based on serial radiographic actions after injection of the entire arterial system. Two reference pin-planes were determined, 1 posterolateral and 1 lateromedial. The sites of insertion of the pins rely on classical radiographs of the bones of the leg. The addition of beaded pins must be made on a realigned and stabilized limb. The imprecision of aim due to the bone structure and the shape of the pin leads to the definition of forbidden zones where any transfixion is dangerous. The concept of a neurovascular pyramid with its base at the distal metaphysis and of a periosseous tendinous circlet at that level implies a search for a compromise between the stability of the assembly and the dangers of the method.

Résumé

L'implantation d'un fixateur externe circulaire selon la méthode d'Ilizarov nécessite la mise en place d'au moins 8 broches transfixiantes. Les dangers vasculo-nerveux et la nécessité de laisser libres les loges musculaires postérieure et latérale sont la raison de cette étude. Le travail s'appuie sur des coupes sériées radiographiques après injection de la totalité du système artériel. Il a ainsi été déterminé 2 plans de broches de référence: 1 plan postéro-latéral et 1 plan latéro-médial. Les points d'implantation des broches utilisent les rayons osseux classiques du squelette jambier. L'adjonction de broches à olive doit se faire sur un membre ré-axé et stabilisé. L'imprécision de visée induite par la structure osseuse et la forme de la broche ont conduit à déterminer des zones interdites où toute transfixion est dangereuse. Le concept de pyramide vasculo-nerveuse à base métaphysaire distale et de couronne tendineuse péri-osseuse, doivent faire rechercher un compromis entre la stabilité du montage et les dangers de la méthode.

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Borrione, F., Jouve, J.L. & Louis, R. Anatomic basis for implantation of the Ilizarov system in the leg. Surg Radiol Anat 10, 283–289 (1988). https://doi.org/10.1007/BF02107899

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  • DOI: https://doi.org/10.1007/BF02107899

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