Fig. 4From: A novel closed reduction technique for treating femoral shaft fractures with intramedullary nails, haemostatic forceps and the lever principleA schematic diagram of reduction with the lever principle. a The lever structure. b Cross-section of the distal fragment before reduction. c Cross-section of the distal fragment after reduction. Fi: in-force, Fo: out-force, Fr: resistance, Li: in-lever arm, Lo: out-lever armBack to article page