From Limb Salvage to Function: A Paradigm Shift in Functional Reconstruction of Mangled Extremities

Mangled extremities resulting from high-energy trauma have long been one of the most formidable challenges in orthopedic trauma and microsurgery. Historically, treatment success was measured by anatomic limb survival. However, clinical practice has demonstrated that a nonfunctional limb remains a heavy burden for patients, whose quality of life may even be inferior to that of amputees fitted with high-quality prostheses. This article systematically articulates a profound paradigm shift from "limb salvage" to "function." We propose the core concept of "functional reconstruction," which does not negate the fundamental principle of "damage control and life preservation," but rather elevates the restoration of useful limb function as the ultimate goal throughout the entire diagnostic and therapeutic continuum. The article dissects the rich connotations of this paradigm and constructs a complete, continuous technical system-from emergent 1-stage precise reconstruction (emphasizing rigid skeletal fixation primarily with internal fixation supplemented by external fixation on the basis of thorough debridement; integrating pedicled and free flaps, particularly neuroskin flaps, for early functional coverage of wounds) to staged sequential reconstruction (incorporating vascularized bone grafts, the Masquelet induced membrane technique, Ilizarov bone transport, and cutting-edge 3D printing technology). Concurrently, this paper underscores the indispensability of a multidisciplinary collaborative model and advocates for the establishment of a novel efficacy evaluation standard centered on patient-reported outcomes. This article aims to provide a novel, function-oriented theoretical framework and practical guidelines for the management of mangled extremities, ushering the discipline into the "functional era."