At the start of the study, 21 sealed envelopes indicating 'LOP + paediatric cuff' and 21 indicating 'standard pressure + standard cuff' will be prepared. The envelopes will be placed in blocks of 4 and 6 in order to minimise the predictive effect. After the grouping of the patient is determined, the person normally responsible for tourniquet cuff application will select an envelope and apply the indicated cuff at the indicated pressure.