1. Purpose The risk of tourniquet-related injury increases with increasing tourniquet cuff pressure, therefore techniques intended to minimise tourniquet cuff pressures should be compared to current standard methods. A commercially available pneumatic tourniquet capable of measuring the pressure needed to occlude blood flow to a limb, known as limb occlusion pressure, combined with contoured tourniquet cuffs has been shown to significantly decrease necessary cuff pressures in adult patients. The magnitude of reduction in cuff pressure in a paediatric population has not yet been determined. Results of this study may decrease the standard tourniquet pressures used by paediatric orthopaedic surgeons, thereby reducing the risk of tourniquet-related injuries.