The nurse is preparing to perform a sterile dressing change on a client who obtained full-thickness burns on the right leg one week ago. Which intervention would the nurse implement first?

Choice A reason: While an arterial blood gas might provide information regarding the patient's acid-base balance and respiratory status, it is not the most immediate priority. The patient’s respiratory rate of 24 and shallow breathing are concerning, but the biochemical threat from electrolytes is more acutely life threatening.

Choice B reason: A potassium level of 6.6 mEq/L indicates severe hyperkalemia, which is common in rhabdomyolysis due to the release of intracellular contents from damaged muscle cells. Hyperkalemia can cause lethal cardiac dysrhythmias and cardiac arrest, making continuous ECG monitoring the most critical immediate intervention to ensure safety.

Choice C reason: Seizure precautions are generally indicated for severe hyponatremia or neurologic irritability. While the sodium is low at 129 mg/dL, the most immediate physiological threat to the patient's life in this scenario is the cardiotoxic effect of the significantly elevated potassium level.

Choice D reason: Encouraging oral fluids is inappropriate for a patient with a creatinine of 4.2 and GFR of 42 mL/min, indicating acute kidney injury. This patient likely requires precise intravenous fluid resuscitation and potentially renal replacement therapy; oral intake would be insufficient and could lead to fluid overload.

Choice A reason: Anaphylaxis triggers a massive systemic release of histamine and leukotrienes, leading to profound smooth muscle contraction in the bronchioles. This bronchoconstriction, along with mucosal edema, results in narrowed airways. Audible wheezing on inspiration and expiration reflects this high velocity airflow through constricted passages, signaling an imminent respiratory compromise.

Choice B reason: A decreased respiratory rate is not typical in the early stages of anaphylactic shock. Instead, the patient usually presents with tachypnea as a compensatory mechanism for hypoxia and respiratory distress. A decreasing respiratory rate in this context would be a late, ominous sign of impending respiratory failure and exhaustion.

Choice C reason: Anaphylactic shock is characterized by profound vasodilation and increased capillary permeability, which leads to a significant drop in systemic vascular resistance. Therefore, the nurse would expect to find hypotension rather than increased blood pressure. Hypertension is inconsistent with the pathophysiology of distributive shock associated with anaphylactic reactions.

Choice D reason: Rhonchi are coarse sounds typically caused by secretions in the larger airways. While some mucus production occurs, the primary respiratory hallmark of anaphylaxis is the constriction of the lower airways (wheezing) and upper airway edema (stridor). Rhonchi are more characteristic of conditions like chronic bronchitis or pneumonia.