Critical Care and Emergency Nursing
Core concepts
Critical care and emergency nursing tests rapid recognition and intervention in life-threatening conditions. Master the ABCDE approach (airway, breathing, circulation, disability, exposure) and triage principles (mass casualty: prioritize those who can be saved with immediate intervention). Know shock types-hypovolemic, cardiogenic, distributive (septic, anaphylactic, neurogenic), obstructive-and their hemodynamic patterns. Understand sepsis (early recognition, cultures before antibiotics, fluids, vasopressors), anaphylaxis (epinephrine first), and cardiac emergencies (ACS, dysrhythmias, defibrillation for VF/pulseless VT). Familiarize yourself with mechanical ventilation basics, arterial blood gases, and monitoring lines.
Traps in questions
A common trap is choosing a diagnostic step before a life-saving intervention: in anaphylaxis, give epinephrine before antihistamines; in VF, defibrillate immediately. Another trap is misidentifying shock: warm, flushed skin with hypotension suggests distributive (septic) shock, not hypovolemic. Remember that in sepsis, antibiotics should follow cultures but must not be delayed. For ACS, aspirin and reperfusion take priority; for suspected aortic dissection, control heart rate and blood pressure. Also know that pulse oximetry can be unreliable in poor perfusion or carbon monoxide poisoning.
Rule of thumb
Life-saving intervention before diagnostics. If the patient is crashing, act (defibrillate, give epinephrine, start compressions) rather than ordering more tests.
Worked example
A patient develops hives, wheezing, and hypotension minutes after an IV antibiotic. Correct action: stop the infusion, give IM epinephrine immediately, support the airway, and call for help-antihistamines and steroids come after epinephrine.