2-digit where did it happen?The "where" portion of an event is described using a process code. The process codes are generally listed in the order the process occurs in transfusion, for example:
Process Process Code Order Entry OE Sample Testing ST Unit Transfusion UT
3-digit description of what happenedThe numeric "what" portion of an event code describes what happened within the process.
For example if the event location was Unit Transfusion (process code - UT), then a possible "what" would be 001, which means "correct product administered to wrong patient."
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