A patient admitted with an extensive anterior myocardial infarction has a blood pressure of 78/50 mm Hg, heart rate of 118, cool mottled extremities, and a cardiac index of 1.6 L/min/m2 with a pulmonary artery occlusion pressure of 24 mm Hg. Which finding best supports a diagnosis of cardiogenic shock rather than another shock state?

A patient with chest pain has ST segment elevation in leads II, III, and aVF. The nurse notes new hypotension and clear lung fields. Before giving the ordered nitrate, which action is most important?

A monitored patient suddenly shows a regular wide complex tachycardia at a rate of 180 with no palpable pulse. What is the priority intervention?

A patient is placed on volume control ventilation. Which variable is held constant by the ventilator with each breath in this mode?

A patient on pressure control ventilation develops worsening pulmonary edema and decreasing lung compliance. With no change to the ventilator settings, what change in delivered tidal volume should the nurse anticipate?

An adult is intubated for acute respiratory distress syndrome and has an ideal body weight of 70 kg. Using a lung protective strategy, which initial tidal volume setting is most appropriate?

A nurse assesses a sacral area with intact skin that is nonblanchable and dark red over a bony prominence in a patient who has been on prolonged vasopressors. Which action best reflects appropriate management of an early pressure injury?

A patient admitted with diabetic ketoacidosis has been on an insulin infusion for 4 hours. Current labs show a blood glucose of 248 mg/dL, an anion gap that remains elevated, and a serum bicarbonate of 14 mEq/L. What is the most appropriate next step?

An older adult presents with a glucose of 920 mg/dL, serum osmolality of 365 mOsm/kg, minimal ketones, and a normal anion gap. The patient is lethargic with dry mucous membranes and a heart rate of 122. What is the priority intervention?

A patient with severe traumatic brain injury has an intracranial pressure of 22 mmHg and a mean arterial pressure of 82 mmHg. What is the calculated cerebral perfusion pressure?

A patient with a traumatic brain injury suddenly develops a unilateral fixed and dilated pupil, contralateral motor weakness, and a declining level of consciousness. Which finding best explains this clinical picture?

A mechanically ventilated patient with severe traumatic brain injury has a sustained intracranial pressure of 26 mmHg despite head of bed elevation, adequate sedation and analgesia, and a midline neutral head position. Which intervention is the most appropriate next step?

A patient with suspected sepsis has lactate drawn as part of the hour-1 bundle. The initial result is 4.2 mmol/L. According to current sepsis bundle guidance, what is the appropriate follow-up action regarding lactate?

A patient in septic shock has received 30 mL/kg of balanced crystalloid and remains hypotensive with a mean arterial pressure of 58 mmHg. Norepinephrine has been started and titrated up, but the MAP target is still not met. Which agent is recommended to add next to reduce the norepinephrine dose?

A patient with septic shock remains on high-dose norepinephrine plus vasopressin and continues to require ongoing vasopressor escalation to maintain perfusion. Which adjunctive therapy is recommended for this patient?

A critical care nurse is appraising studies to update the unit protocol for preventing catheter-associated bloodstream infections. The nurse must select the source that provides the strongest basis for a practice change. Which source represents the highest level of evidence?

A trial of an early mobility protocol in mechanically ventilated patients reports a reduction in ICU length of stay with a relative risk of 0.70 and a 95 percent confidence interval of 0.52 to 0.94. How should the critical care nurse interpret these results when deciding whether to adopt the protocol?

After completing a literature review supporting subglottic secretion drainage to reduce ventilator-associated events, a unit council wants to translate the evidence into sustained bedside practice. Which strategy is most likely to produce durable adoption across all shifts?