A nurse is assisting in the care of a client in the intensive care unit (ICU) Exhibits The nurse should identify which of the following client's conditions can indicate the development of delirium.

Rationale: • Past medical history like Parkinson’s disease increases the risk of delirium but is not a direct symptom. It may contribute but does not confirm the presence of delirium alone. Current behavior and cognition changes are more reliable indicators. • Illusions involve misinterpreting real stimuli, unlike this client’s perception of spiders that aren’t there. Hallucinations are a more accurate description of this experience. Therefore, illusions are less consistent with the actual findings. • Change in orientation is a hallmark of delirium and is shown by the client’s confusion about the date and location. The sudden onset and fluctuation in awareness suggest an acute cognitive disturbance. This finding supports the development of delirium in the ICU setting. • Hallucinations, such as seeing spiders that are not present, reflect sensory misperceptions. These are typical in hyperactive delirium and often cause agitation or fear. They indicate an altered mental state requiring urgent assessment.