Final answer:
The nursing diagnosis is a step in the nursing process where nurses identify health problems after analyzing patient data, such as symptoms of a pulmonary embolism.
Step-by-step explanation:
The step of the nursing process called nursing diagnosis occurs after data collection and before the planning step. During the nursing diagnosis, nurses analyze the data gathered about the patient's condition and identify the patient's health problems, which could include a pulmonary embolism or related issues like hypoxemia. The nursing diagnosis for a patient with a pulmonary embolism would be focused on the respiratory implications and the potential for decreased gas exchange due to blocking of pulmonary blood flow.