An RN is observing a nursing student who is open suctioning a hospitalized patient with a tracheostomy in place. Which action by the student requires the RN to intervene?

Rationale:

A. Beans are a safe source of protein, fiber, and other nutrients and do not interfere with the absorption, metabolism, or excretion of theophylline. Including beans in the diet will not affect the drug’s therapeutic levels or increase the risk of toxicity. Therefore, there is no need to omit beans from the client’s meal tray.

B. Milk and other dairy products are also safe for clients taking theophylline. Calcium in milk does not impact the pharmacokinetics of theophylline or reduce its effectiveness. The client can safely consume milk as part of their regular diet without concern for interactions with the medication.

C. Peas are another safe and nutritious food that has no known interaction with theophylline. They provide vitamins, minerals, and fiber but do not affect drug levels or the risk of side effects. Including peas on the meal tray is appropriate and does not pose a safety concern.

D. Coffee contains caffeine, which belongs to the same pharmacologic class as theophylline, called methylxanthines. Consuming caffeine while taking theophylline can lead to additive stimulant effects, increasing central nervous system stimulation and causing restlessness, insomnia, or anxiety. It can also increase cardiac stimulation, leading to tachycardia, palpitations, and potentially dangerous arrhythmias. Additionally, caffeine may exacerbate gastrointestinal side effects such as nausea, vomiting, or abdominal discomfort. Because caffeine can potentiate theophylline toxicity even when the medication is at therapeutic levels, it is essential to avoid coffee and other caffeinated products, including tea, chocolate, energy drinks, and some sodas. The nurse should educate the client about reading labels and monitoring their total caffeine intake to ensure safe theophylline therapy.

Rationale:

A. An HCO3 of 28 mEq/L is slightly elevated and may indicate metabolic compensation for a chronic respiratory acidosis, but it is not an acute complication of PEEP therapy and does not require immediate intervention.

B. A PaO2 of 79 mmHg is slightly below normal but may be acceptable depending on the patient’s baseline and underlying condition. Mild hypoxemia alone is not an emergency in a ventilated patient.

C. Hypotension is a serious complication of high levels of positive end-expiratory pressure (PEEP). PEEP increases intrathoracic pressure, which can reduce venous return to the heart, decrease cardiac output, and lead to hypotension. A blood pressure of 70/45 mmHg indicates shock or severe hemodynamic compromise and requires immediate intervention, such as fluid resuscitation, vasopressors, or adjustment of PEEP settings.

D. A PaCO2 of 32 mmHg indicates mild respiratory alkalosis due to hyperventilation, which is not uncommon in mechanically ventilated patients. It does not represent an acute complication requiring immediate treatment.