Which scenario best illustrates an omission error?

• A. Failing to perform a planned intervention
• B. Administering a medication at the correct time
• C. Checking vital signs every hour
• D. Documenting an intervention after it was performed

Answer: (A)

An omission error happens when a planned action or step in patient care is not carried out. Failing to perform a planned intervention fits this definition exactly because the intended care was never done, leaving the patient without the necessary treatment. The other scenarios describe actions that were completed (administering medication on time; checking vital signs regularly) or a lapse in recording after the fact, which is a different type of error—documentation—rather than an omission of care. To prevent omissions, use clear care plans, reminders, and effective handoffs to ensure every planned intervention is carried out.