Bastion Classification — Blast Injury to Lower Extremity

The Bastion Classification system characterizes the severity of blast injuries to the lower extremity, developed from military trauma experience at Camp Bastion (UK military hospital, Helmand Province, Afghanistan). It classifies the anatomical zone of injury (I–IV, with higher zones indicating more proximal injury) and provides guidance on amputation planning and prosthetic potential. Zone I = foot/ankle, Zone II = tibial shaft, Zone III = knee/distal femur, Zone IV = femoral/above knee. May be combined with vascular injury assessment for limb salvage vs. amputation decision-making.