Which Scenario Best Illustrates the Nurse Using Data Validation When

Which scenario best illustrates the nurse using data validation when making a nursing clinical decision for a patient?

A) The nurse determines to remove a wound dressing when the patient reveals the time of the last dressing change and notices old and new drainage.
B) The nurse administers pain medicine due at 1700 at 1600 because the patient reports increased pain and the family wants something done.
C) The nurse immediately asks the health care provider for an order of potassium when a patient reports leg cramps.
D) The nurse elevates a leg cast when the patient reports decreased mobility.