Medical errors can be defined in a number of ways. The AHRQ definition:

Mistakes made in the process of care that result in or have the potential to do harm to patients.(Agency for Healthcare Research and Quality, 2004, p. 57).

The Institute of Medicine definition:

The failure of a planned action to be completed as intended (i.e. error in execution) or the use of a wrong plan to achieve an aim (i.e., error in planning) (Kohn, 2000, p. 28).

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