Patients receiving mechanical ventilation should have a formal assessment of readiness for weaning. Which of the following are essential assessments before extubation? Select all that apply.

Choice C rationale

Asystole, or ventricular standstill, must be confirmed in at least two different leads to rule out fine ventricular fibrillation or technical errors like a loose lead. Treating "false" asystole can delay life-saving defibrillation if the patient is actually in a shockable rhythm. Assessment is the first step in the nursing process. Verifying the rhythm and checking the patient's pulse ensures that the clinical intervention matches the true physiological state of the patient.

Choice A rationale

Epinephrine is the primary medication used during the resuscitation of a patient in asystole according to ACLS guidelines. It works by causing peripheral vasoconstriction and increasing coronary perfusion pressure. However, the nurse should never administer medication based on a monitor rhythm alone without first assessing the patient and confirming the rhythm in multiple leads. Once confirmed and CPR is initiated, epinephrine 1 mg is given every 3 to 5 minutes during the arrest.

Choice B rationale

Intubation is an important part of advanced airway management during cardiac arrest to ensure adequate oxygenation and protection against aspiration. While it is a component of the ACLS algorithm, it is not the initial action. The nurse must first verify the rhythm and begin high-quality chest compressions. Airway management often occurs simultaneously with or after the initiation of CPR and the confirmation of the cardiac arrest rhythm to maximize perfusion.

Choice D rationale

Atropine was previously included in the asystole algorithm to treat potential vagal discharge, but it is no longer recommended by the American Heart Association for asystole or pulseless electrical activity. Current protocols focus on high-quality CPR and early epinephrine administration. Administering atropine would be an outdated practice and does not address the primary need for assessment and perfusion in a patient who has no detectable electrical activity or mechanical pulse.

Choice A rationale

Shortness of breath in a patient scheduled for furosemide suggests acute fluid overload or pulmonary edema, which is a life-threatening condition requiring immediate intervention. Furosemide is a potent loop diuretic that reduces preload by increasing renal excretion of water and sodium. Rapid administration helps alleviate respiratory distress by decreasing pulmonary vascular congestion. In the triage hierarchy, respiratory stability always takes precedence over pain management or non-emergent cardiac rate control.

Choice B rationale

Diphenhydramine is an antihistamine used to treat allergic reactions or pruritus. While itching is uncomfortable, it is not a physiological priority compared to a patient experiencing respiratory compromise. Unless the itching is accompanied by signs of anaphylaxis, such as airway swelling or hypotension, this medication can be safely delayed until more urgent patient needs are met. This choice represents a comfort measure rather than a life-saving respiratory intervention for the nurse.

Choice C rationale

Morphine is an opioid analgesic indicated for pain management. While managing pain is a core nursing responsibility, it falls below the airway, breathing, and circulation (ABC) priority framework. Pain is subjective and, although distressing, does not pose the same immediate risk of mortality as acute shortness of breath. The nurse must first ensure the patient in choice A can breathe adequately before addressing the moderate pain levels of this patient.

Choice D rationale

Digoxin is an inotropic agent used to control the ventricular rate in atrial fibrillation and improve cardiac contractility. While important for long-term hemodynamic stability, it does not typically require the same immediate "stat" administration as a diuretic for a patient currently struggling to breathe. If the patient is hemodynamically stable, the scheduled dose can follow the administration of the furosemide. Priority is given to the most unstable patient based on current symptoms.