On admission to the emergency department, the patient is unconscious after suspected overdose of sleeping pills. The patient's temperature is 98, pulse is 60, respirations are 10, and blood pressure is 90/50. Pupillary reflexes are sluggish. What is the initial action of the ED nurse?

A. Sitting in the tripod position: Tripod positioning is a common compensatory mechanism in patients with COPD to maximize diaphragmatic expansion and ease breathing. While it indicates respiratory distress, it is an expected adaptive behavior and not immediately life-threatening.

B. O₂ saturation of 91%: An oxygen saturation of 91% is slightly below normal and should be monitored. In COPD patients, target saturations are often 88–92%, so this finding alone may not require urgent intervention if the patient is otherwise stable.

C. Respiratory rate has decreased from 30 to 10 breaths/min: A sudden drop in respiratory rate in a patient previously tachypneic is highly concerning, as it suggests impending respiratory failure or fatigue of the respiratory muscles. This change indicates inadequate ventilation and CO₂ retention, requiring immediate notification to the healthcare provider for urgent intervention.

D. Bilateral lung crackles: Crackles may indicate fluid overload, infection, or pulmonary edema, which are important to monitor and treat. However, in acute respiratory distress, a decreasing respiratory rate represents a more immediate threat to oxygenation and ventilation, making it the highest priority to report.

A. Sodium nitroprusside: Sodium nitroprusside is a potent arterial and venous vasodilator used primarily in hypertensive emergencies and acute heart failure. In septic shock, systemic vascular resistance is already profoundly decreased due to inflammatory-mediated vasodilation. Administering a vasodilator would further lower blood pressure and worsen hypoperfusion.

B. Norepinephrine: Norepinephrine is the first-line vasopressor for septic shock when hypotension persists after adequate fluid resuscitation. It stimulates alpha-1 adrenergic receptors to increase systemic vascular resistance and beta-1 receptors to enhance myocardial contractility. This improves mean arterial pressure and supports organ perfusion in distributive shock states.

C. Regular insulin: Regular insulin is used to manage hyperglycemia, which is common in critically ill patients due to stress-induced insulin resistance. While glucose control is important, insulin does not address the primary hemodynamic instability of septic shock. It has no direct effect on vascular tone or cardiac output in this context.

D. Nitroglycerin: Nitroglycerin is a venous vasodilator that reduces preload and myocardial oxygen demand, typically used in acute coronary syndromes or heart failure. In septic shock with declining blood pressure and cardiac output, reducing preload would further compromise perfusion. Vasopressor support, not vasodilation, is indicated.