Inclusion Criteria:  Patients aged at least 6 to 17 years old Patients requiring venous cannulation for blood transfusion  Exclusion Criteria:  Patients with a previous history of sensitization or allergy to EMLA cream Patients with a previous history of allergy to materials used in the study (e.g. Polyvinyl Alcohol (PVA), Polyethylene Terephthalate (PET), Maltose, Electrodes and Plaster constituents) Patients receiving other forms of analgesic agents within 24 hours prior to the cannulation procedures Patients with generalized skin disorders / rash Patients who are agitated or aggressive