Most intertrochanteric fractures never threaten the femoral shaft — the battle is fought and won in the trochanteric region. For that caseload the short nail is enough implant: it fixes the proximal fragment through the head element, controls rotation with a single distal lock, and shortens operative time in a patient group where minutes under anaesthesia matter.
The compact length also sidesteps a real geometry problem. Elderly femora are bowed, and a long rigid nail can drive its tip into the anterior cortex distally; the short nail ends well proximal to that conflict. The sliding head element then lets the fracture compress along the neck axis as the patient loads the leg. Fracture stability assessment and the choice between short and long remain with the operating surgeon.
