Two dimensional PDF-417 and linear Code39 barcodes appearing on wristband labels detailing up to 2,000 characters of information on the patients wrist, helping protecting the patient from serious hazards of blood transfusion and incorrect drug doses.

The NHS has invested heavily in systems to minimise the problems associated with Serious Hazard of Transfusion (SHOT) and administering incorrect doses or drugs to patients through the use of barcodes.