Critical Care MCQs Posted by Pujari Vinod Date August 26, 2025 Comments 0 comment Welcome to your Critical Care MCQs Name Email 1. Lactic acidosis most commonly results from ? Liver failure Tissue hypoxia from sepsis Hyperventilation Hypokalemia None 2. First-line management of status epilepticus is ? Phenobarbital IV lorazepam/midazolam Phenytoin loading General anesthesia None 3. Hallmark of tension pneumothorax is ? Bilateral wheeze Tracheal deviation + hypotension Crepitations Tachycardia only None 4. Early goal-directed therapy is aimed at optimizing ? Liver perfusion Tissue oxygen delivery Fluid overload Cardiac arrhythmias None 5. Severe Tricyclic Antidepressant (TCA) overdose (wide QRS) is treated with ? Calcium gluconate Insulin Sodium bicarbonate Heparin None 6. Mannitol works in raised ICP by ? Reducing CSF production Osmotic diuresis reducing brain volume Vasodilation of cerebral vessels Increasing CPP None 7. Carbon monoxide poisoning is treated with ? 100% O₂ or hyperbaric O₂ NAC Sodium thiosulfate IV antibiotics None 8. Antidote for paracetamol poisoning is ? Atropine N-acetylcysteine Vitamin K Sodium bicarbonate None 9. The most sensitive marker of tissue hypoperfusion is ? CVP Serum lactate Mixed venous O₂ saturation Arterial pH None 10. Dobutamine is used in cardiogenic shock because ? Increases SVR Improves CO with slight vasodilation Decreases HR Reduces renal flow None 11. The Swan-Ganz catheter is most useful for ? Measuring systemic vascular resistance Directly measuring LV end-diastolic pressure Identifying brain perfusion Monitoring lactate None 12. The target CPP in TBI is ? 30–40 mmHg 50–70 mmHg >100 mmHg <40 mmHg None 13. The most common cause of AKI in critically ill patients is ? Post-renal obstruction Pre-renal azotemia/ischemia Glomerulonephritis Nephrolithiasis None 14. A patient is hypovolemic. Which hemodynamic finding suggests this ? High CVP Variation of systolic BP with ventilation High PCWP Low SVR None 15. Caloric need of critically ill patient ? 10 kcal/kg/da 15 kcal/kg/da 25 kcal/kg/da 40 kcal/kg/da None 16. Hyperkalemia with ECG changes is best treated initially with ? Insulin + glucose Kayexalate Calcium gluconate Hemodialysis None 17. The first step in managing an unconscious patient with absent gag reflex is ? Insert nasogastric tube Insert oral airway and assess for need of intubation Start chest compressions Give IV sedatives immediately None 18. In severe pancreatitis, nutrition should be given via ? NPO + TPN Early enteral feeding (nasojejunal) Parenteral lipids only Clear fluids None 19. Antidote for benzodiazepine overdose is ? Atropine Naloxone Flumazenil Physostigmine None 20. After cardiac arrest, neurologic outcome improves with ? Hyperventilation Targeted temperature management Steroids Phenytoin None 21. Refeeding syndrome commonly causes ? Hypokalemia Hypophosphatemia Hypercalcemia Hyperuricemia None 22. Prone positioning in ARDS primarily improves oxygenation by ? Reducing FiO₂ Increasing CO₂ clearance Improving V/Q matching Reducing cardiac output None 23. A 60-year-old on mechanical ventilation has auto-PEEP. The best ventilator adjustment is ? Increase tidal volume Decrease respiratory rate Increase inspiratory time Add dead space None 24. The most common cause of distributive shock in the ICU is ? Sepsis Anaphylaxis Neurogenic shock Addisonian crisis None 25. The most common ICU electrolyte abnormality is ? Hypocalcemia Hyponatremia Hypokalemia Hypermagnesemia None 26. The order not to perform CPR is ? Living will Advance directive DNR order Withdrawal of support None 27. Rescue therapy for severe ARDS with refractory hypoxemia is ? Steroids ECMO Tracheostomy Bronchodilators None 28. CRRT is preferred over intermittent dialysis for Stable patients Hemodynamically unstable patients Outpatient dialysis Rapid correction of hyperkalemia None 29. Pulseless VT/VF should be treated first with ? Atropine Defibrillation Lidocaine Epinephrine None 30. The earliest finding in sepsis is ? Hypotension Tachycardia Oliguria Elevated bilirubin None Share: Pujari Vinod Next post Internal Medicine MCQs September 1, 2025 You may also like Fellowships without NEET PG: A credible career path for MBBS doctors January 22, 2026 Fellowship Courses After MBBS in India: A Practical Career Guide December 26, 2025 Top International Certification Programs for Indian Doctors June 5, 2025