A nurse is documenting client care in the nurses' notes and notices that a space was left blank. Which of the following actions should the nurse take?

A. Amyloid plaque: Amyloid plaque buildup is characteristic of Alzheimer’s disease, a chronic, progressive form of dementia. While dementia can increase the overall risk for delirium, amyloid plaques themselves are not an immediate trigger for acute confusion like delirium.

B. Urinary tract infection: Urinary tract infections are a common reversible cause of delirium, especially in older adults. Infections can trigger a systemic inflammatory response and disrupt normal brain function, leading to sudden-onset confusion, disorientation, and restlessness due to systemic inflammation and changes in metabolic balance.

C. High cholesterol: High cholesterol contributes to long-term cardiovascular risks, such as atherosclerosis and stroke, but it is not directly linked to the sudden cognitive changes seen in delirium. It does not cause the acute neurological dysfunction characteristic of delirium.

D. Hypersomnia: Hypersomnia, or excessive daytime sleepiness, may reflect underlying sleep disorders or other chronic conditions, but it is not recognized as a common direct cause of delirium. Acute changes in mental status are more often tied to factors like infection, medications, or metabolic disturbances.

• Frequent headaches: Phenelzine, an MAOI, can cause hypertensive crisis, with one of the earliest signs being persistent or worsening headaches. Frequent headaches must be treated as a possible warning of dangerously elevated blood pressure and require immediate provider notification.
• Elevated blood pressure (169/91 mm Hg): The significant rise in the client's blood pressure compared to baseline indicates new-onset hypertension. This is a serious adverse effect associated with MAOIs and signals the potential development of a hypertensive crisis, which must be urgently addressed.
• Difficulty sleeping: Difficulty sleeping or insomnia is a common side effect of phenelzine and other antidepressants. Although not life-threatening, insomnia can impair recovery if untreated and should be documented and discussed with the provider to adjust management if needed.
• Feeling much better: Improvement in mood and reduced fatigue are intended therapeutic outcomes of phenelzine treatment. These findings are positive signs and do not indicate an adverse reaction that needs intervention.
• Heart rate 78/min and respiratory rate 18/min: Both values are within normal ranges and do not suggest immediate concerns related to cardiovascular or respiratory function. They should continue to be monitored but do not require urgent action.