To use evidence-based practice, you need a clear idea of the question you would like to answer. The PICO criteria can help you formulate a clinical question and guide your search for Evidence, helping you find the best evidence in a quicker, more efficient manner.
P
Patient or Problem
How would you describe the patient? What issue are they experiencing?
I
Intervention
What would you like to do to help the patient?
C
Comparison
What would be the alternative to the intervention you selected?
O
Outcome
By doing the intervention, what do you hope to accomplish?
PICO can also help you to identify keywords to use in CINAHL and PubMed. You don't want to use the entire clinical question as your search terms. Pull out the most important words to optimize your search results.