Fundamentals of Critical Care Support (FCCS) — Questions and Answers

Question 1: Which parameter in a spontaneous breathing trial indicates failure and need to resume full ventilatory support?

Tidal volume of 400 mL
Rapid shallow breathing index (RSBI) > 105 (Correct answer)
Respiratory rate 18 breaths/min
SpO2 99%

Correct answer: Rapid shallow breathing index (RSBI) > 105

RSBI (respiratory rate ÷ tidal volume in liters) > 105 predicts SBT failure with high sensitivity, indicating the patient is not ready for extubation.

Question 2: The Surviving Sepsis Campaign recommends completing a 30 mL/kg IV crystalloid bolus within how many hours of septic shock?

1 hour
3 hours (Correct answer)
12 hours
6 hours

Correct answer: 3 hours

The Surviving Sepsis Campaign Hour-1 Bundle recommends administering at least 30 mL/kg IV crystalloid within 3 hours of septic shock identification.

Question 3: Source control in sepsis refers to:

Prescribing broad-spectrum antibiotics
Physically removing or draining the infectious focus (e.g., abscess drainage) (Correct answer)
Reducing fever with antipyretics
Isolating the patient in negative pressure room

Correct answer: Physically removing or draining the infectious focus (e.g., abscess drainage)

Source control involves definitive measures to eliminate the infection source — debridement, drainage, or removal of infected devices — and is a critical Surviving Sepsis recommendation.

Question 4: In sepsis with suspected meningitis, the correct order of interventions is:

CT head → LP → blood cultures → antibiotics
Antibiotics → wait 4 hours → LP → blood cultures
LP first → blood cultures → CT → antibiotics
Blood cultures → antibiotics + dexamethasone → CT → LP if safe (Correct answer)

Correct answer: Blood cultures → antibiotics + dexamethasone → CT → LP if safe

Blood cultures are drawn first, then antibiotics and corticosteroids are given immediately without delaying for LP; imaging is obtained to assess LP safety if needed.

Question 5: Inadvertent hypothermia in critically ill patients is associated with which complication?

Coagulopathy, cardiac arrhythmias, and increased infection risk (Correct answer)
Improved antibiotic efficacy
Reduced oxygen consumption only
Improved neurological recovery in all patients

Correct answer: Coagulopathy, cardiac arrhythmias, and increased infection risk

Hypothermia impairs platelet function and coagulation factors, increases arrhythmia risk, and suppresses immune function, worsening outcomes in most critically ill patients.

Question 6: Decorticate posturing indicates injury at which level of the nervous system?

Above the midbrain (hemispheric/internal capsule) (Correct answer)
Brainstem below the pons
Peripheral nerve level
Spinal cord at C4

Correct answer: Above the midbrain (hemispheric/internal capsule)

Decorticate posturing (arm flexion, leg extension) reflects disruption of corticospinal tracts above the midbrain, releasing primitive brainstem reflexes.

Question 7: Which urine output threshold is commonly used to indicate adequate fluid resuscitation in critically ill adults?

0.3 mL/kg/hr
0.5 mL/kg/hr (Correct answer)
0.1 mL/kg/hr
1.5 mL/kg/hr

Correct answer: 0.5 mL/kg/hr

A urine output of at least 0.5 mL/kg/hr reflects adequate renal perfusion and is a standard resuscitation endpoint.

Question 8: When is hypertonic saline (3% NaCl) indicated for hyponatremia?

All cases of chronic mild hyponatremia
Symptomatic acute hyponatremia with seizures or severe altered consciousness (Correct answer)
Asymptomatic hyponatremia with sodium 128–134 mEq/L
Any patient with sodium < 135 mEq/L

Correct answer: Symptomatic acute hyponatremia with seizures or severe altered consciousness

Hypertonic saline is reserved for severe symptomatic acute hyponatremia (seizures, coma) where rapid partial correction is necessary to prevent herniation.

Question 9: Empiric antifungal therapy with an echinocandin is most appropriate in which ICU patient?

Any patient on broad-spectrum antibiotics for > 24 hours
Any febrile neutropenic patient regardless of risk
Critically ill patient with multiple risk factors and positive beta-D-glucan or clinical candidiasis (Correct answer)
All ICU patients prophylactically

Correct answer: Critically ill patient with multiple risk factors and positive beta-D-glucan or clinical candidiasis

Echinocandin empiric therapy is indicated in critically ill patients with multiple candidiasis risk factors (prolonged antibiotics, TPN, renal replacement, colonization) plus suggestive biomarkers or clinical signs.

Question 10: Which of the following is an example of invasive hemodynamic monitoring?

Non-invasive blood pressure (NIBP) monitoring
Pulse oximetry
Central venous pressure (CVP) monitoring (Correct answer)
Electrocardiogram (ECG)

Correct answer: Central venous pressure (CVP) monitoring

Invasive hemodynamic monitoring involves placing catheters directly into blood vessels or the heart to obtain precise and continuous measurements of cardiovascular function. Central venous pressure (CVP) monitoring is a classic example, where a catheter is inserted into a large vein to measure pressure in the right atrium. This provides real-time data on fluid status and right heart function, which is crucial for guiding treatment decisions in critically ill patients.

Question 11: A patient is placed on mechanical ventilation. Which of the following settings is typically adjusted to control the patient's carbon dioxide (CO2) levels?

Tidal volume
Fraction of inspired oxygen (FiO2)
Respiratory rate (Correct answer)
Positive end-expiratory pressure (PEEP)

Correct answer: Respiratory rate

On mechanical ventilation, the respiratory rate is the primary setting adjusted to control the patient's carbon dioxide (CO2) levels. Increasing the respiratory rate increases the minute ventilation, which helps to 'blow off' more CO2 from the lungs, thereby lowering blood CO2 levels. Conversely, decreasing the respiratory rate allows CO2 to accumulate.

Question 12: Neurogenic pulmonary edema following severe TBI or subarachnoid hemorrhage is caused by:

Direct viral lung injury
Fluid overload from resuscitation
Massive sympathetic discharge increasing pulmonary capillary pressure (Correct answer)
Aspiration of gastric contents

Correct answer: Massive sympathetic discharge increasing pulmonary capillary pressure

Severe brain injury triggers massive catecholamine release, raising pulmonary vascular pressures and causing fluid transudation into the alveoli.

Question 13: Point-of-care ultrasound (POCUS) in the ICU can rapidly assess which clinical question?

Microorganism identification
Exact serum electrolyte values
Coagulation cascade function
Presence of pericardial effusion, pneumothorax, or volume status (Correct answer)

Correct answer: Presence of pericardial effusion, pneumothorax, or volume status

POCUS enables bedside evaluation of pericardial effusion, pleural effusion, pneumothorax, IVC collapsibility (volume status), and cardiac function.

Question 14: A patient with hyperkalemia (K+ = 6.8 mEq/L) shows peaked T-waves and widened QRS on ECG. What is the FIRST intervention?

Furosemide IV
Calcium gluconate IV (Correct answer)
Insulin and dextrose
Sodium polystyrene sulfonate (Kayexalate)

Correct answer: Calcium gluconate IV

Calcium gluconate stabilizes the cardiac membrane and counteracts the cardiotoxic effects of hyperkalemia; it should be given first when ECG changes are present.

Question 15: In a patient with pulseless electrical activity (PEA), which of the following is a reversible cause?

Tension pneumothorax (Correct answer)
Hypernatremia
Hypomagnesemia
Hyperthyroidism

Correct answer: Tension pneumothorax

Tension pneumothorax is one of the 5 H's and 5 T's reversible causes of PEA arrest and requires immediate needle decompression.

Question 16: Cerebral perfusion pressure (CPP) is calculated as:

Systolic BP − ICP
MAP − ICP (Correct answer)
MAP + ICP
Diastolic BP + ICP

Correct answer: MAP − ICP

CPP = MAP − ICP; maintaining CPP above 60–70 mmHg ensures adequate cerebral blood flow despite elevated intracranial pressure.

Question 17: What is the mechanism of action of adenosine in terminating SVT?

Increases vagal tone chronically
Blocks calcium channels in ventricular muscle
Transiently blocks AV nodal conduction, interrupting reentry circuits (Correct answer)
Prolongs ventricular action potential

Correct answer: Transiently blocks AV nodal conduction, interrupting reentry circuits

Adenosine causes transient AV nodal block by activating A1 receptors, interrupting the reentrant circuit responsible for most SVT.

Question 18: Which of the following is the most appropriate first step in managing a patient with a suspected airway obstruction?

Perform a cricothyrotomy
Use a bag-valve-mask to provide ventilation
Administer supplemental oxygen
Insert an oropharyngeal airway (Correct answer)

Correct answer: Insert an oropharyngeal airway

In a patient with a suspected airway obstruction, especially if unconscious, the initial step is to open the airway using basic maneuvers. If these are insufficient, inserting an oropharyngeal airway (OPA) is the most appropriate first device-based intervention. It helps maintain an open airway by preventing the tongue from obstructing the pharynx, serving as a crucial bridge to more advanced airway management if needed.

Question 19: Which of the following is the best indicator of tissue perfusion in a critically ill patient?

Lactate level (Correct answer)
Central venous pressure (CVP)
Mean arterial pressure (MAP)
Cardiac Output (CO)

Correct answer: Lactate level

Lactate level is the best indicator of tissue perfusion in a critically ill patient because it directly reflects the metabolic state of the tissues. Elevated lactate signifies anaerobic metabolism, which occurs when oxygen delivery is insufficient to meet cellular demands, indicating global tissue hypoperfusion and shock. It provides an early and sensitive measure of inadequate oxygenation at the cellular level.

Question 20: Which medication should be avoided in right ventricular infarction with hypotension?

Nitroglycerin (preload reducers) (Correct answer)
Aspirin
Oxygen
Heparin

Correct answer: Nitroglycerin (preload reducers)

RV infarction depends on adequate preload; nitroglycerin reduces venous return, worsening hypotension in this setting.

Question 21: Which criterion distinguishes septic shock from sepsis in Sepsis-3 definitions?

Vasopressor requirement to maintain MAP ≥ 65 plus lactate > 2 mmol/L despite adequate resuscitation (Correct answer)
White count > 12,000
Temperature > 38.5°C
Positive blood cultures

Correct answer: Vasopressor requirement to maintain MAP ≥ 65 plus lactate > 2 mmol/L despite adequate resuscitation

Septic shock is sepsis with persistent circulatory and cellular/metabolic abnormalities requiring vasopressors to achieve MAP ≥ 65 and serum lactate > 2 mmol/L despite fluids.

Question 22: What is the primary rationale for glucose control targeting 140–180 mg/dL (rather than strict normoglycemia) in ICU patients?

It improves renal function specifically
It reduces antibiotic requirements
Tight glucose control (80–110) increases hypoglycemia risk and mortality, while moderate control balances glycemic harm (Correct answer)
It reduces the need for insulin infusions

Correct answer: Tight glucose control (80–110) increases hypoglycemia risk and mortality, while moderate control balances glycemic harm

The NICE-SUGAR trial showed tight glucose control (80–110 mg/dL) increased mortality and hypoglycemia; moderate control targeting 140–180 mg/dL is now standard.

Question 23: Which interventions are part of the initial management of septic shock?

Administration of corticosteroids
Administration of broad-spectrum antibiotics (Correct answer)
Early vasopressor therapy if hypotension persists after fluid resuscitation (Correct answer)
Rapid infusion of intravenous fluids (Correct answer)

Correct answer: Administration of broad-spectrum antibiotics

Administration of broad-spectrum antibiotics is a cornerstone of initial septic shock management. Rapidly identifying and treating the infection source is critical to reversing the shock state and improving patient survival. This intervention, along with fluid resuscitation and early vasopressors, forms the initial bundle of care for septic shock.

Question 24: What is the recommended frequency of endotracheal tube cuff pressure checks in ventilated patients?

Once after intubation only
Every 2 hours
Every shift (every 8–12 hours) (Correct answer)
Once per week

Correct answer: Every shift (every 8–12 hours)

Cuff pressure should be checked and maintained at 20–30 cmH2O every 8–12 hours to prevent microaspiration above the cuff and tracheal injury below it.

Question 25: Dobutamine is preferred over norepinephrine in which hemodynamic state?

Septic shock with high cardiac output
Cardiogenic shock with low cardiac output and adequate blood pressure (Correct answer)
Hemorrhagic shock
Neurogenic shock

Correct answer: Cardiogenic shock with low cardiac output and adequate blood pressure

Dobutamine's positive inotropic effect makes it the agent of choice when pump failure (low CO) is the primary problem with a relatively preserved MAP.

Question 26: Arterial line placement provides which advantage over non-invasive blood pressure monitoring?

It measures central venous pressure
It reduces medication administration errors
Continuous beat-to-beat blood pressure monitoring and arterial blood gas sampling access (Correct answer)
It prevents vasospasm

Correct answer: Continuous beat-to-beat blood pressure monitoring and arterial blood gas sampling access

Arterial lines enable continuous real-time blood pressure monitoring and provide ready access for frequent arterial blood gas sampling without repeated punctures.

Question 27: The first-line vasopressor for septic shock per Surviving Sepsis Guidelines is:

Dopamine
Vasopressin
Epinephrine
Norepinephrine (Correct answer)

Correct answer: Norepinephrine

Norepinephrine is recommended as the first-choice vasopressor for septic shock due to its superior vasoconstrictive effect and favorable safety profile.

Question 28: What is the maximum recommended rate of sodium correction in chronic hyponatremia to prevent osmotic demyelination syndrome?

25 mEq/L per 24 hours
8–10 mEq/L per 24 hours (Correct answer)
1–2 mEq/L per hour
15–20 mEq/L per 24 hours

Correct answer: 8–10 mEq/L per 24 hours

Correcting chronic hyponatremia faster than 8–10 mEq/L per 24 hours risks osmotic demyelination (central pontine myelinolysis), a devastating neurological complication.

Question 29: A MAP of less than what value generally requires vasopressor initiation in septic shock?

60 mmHg
70 mmHg
65 mmHg (Correct answer)
55 mmHg

Correct answer: 65 mmHg

The Surviving Sepsis Campaign recommends targeting a mean arterial pressure of at least 65 mmHg, initiating vasopressors when MAP falls below this threshold.

Question 30: Which parameters can be directly measured using a central venous catheter?

Pulmonary artery pressure
Mixed venous oxygen saturation (SvO2) (Correct answer)
Cardiac output
Central venous pressure (CVP) (Correct answer)

Correct answer: Mixed venous oxygen saturation (SvO2)

A central venous catheter (CVC) allows for the direct measurement of central venous pressure (CVP). CVP reflects the pressure in the right atrium and provides an estimate of right ventricular preload and overall fluid status. While specialized CVCs can measure other parameters, CVP is a fundamental direct measurement obtained from any standard central line.

Question 31: In obstructive lung disease, which ventilator adjustment reduces auto-PEEP (air trapping)?

Increase respiratory rate
Increase tidal volume
Add more PEEP
Decrease inspiratory time / increase expiratory time (Correct answer)

Correct answer: Decrease inspiratory time / increase expiratory time

Prolonging expiratory time allows trapped air to escape, reducing intrinsic PEEP in patients with obstructive physiology.

Question 32: In diabetic ketoacidosis (DKA), why may serum potassium appear normal or elevated despite total body potassium depletion?

Osmotic diuresis selectively preserves potassium
Insulin resistance causes potassium retention in cells
Hyperglycemia increases gastrointestinal potassium absorption
Acidosis shifts potassium from intracellular to extracellular fluid (Correct answer)

Correct answer: Acidosis shifts potassium from intracellular to extracellular fluid

Metabolic acidosis drives hydrogen ions into cells in exchange for potassium moving out, falsely elevating serum potassium despite total body depletion.

Question 33: A GCS score of 8 or less indicates what clinical concern?

Moderate concussion
Inability to protect the airway — consider intubation (Correct answer)
Mild cognitive impairment
Psychiatric disorder

Correct answer: Inability to protect the airway — consider intubation

GCS ≤ 8 is associated with inability to maintain airway patency and loss of protective reflexes, typically necessitating intubation.

Question 34: Which sedation scale is most commonly used to assess depth of sedation in ICU patients?

Richmond Agitation-Sedation Scale (RASS) (Correct answer)
Ramsay Scale (original version)
Wong-Baker FACES Scale
Numeric Rating Scale (NRS)

Correct answer: Richmond Agitation-Sedation Scale (RASS)

The RASS is the most validated and widely used tool for assessing sedation depth in mechanically ventilated ICU patients, ranging from -5 (unarousable) to +4 (combative).

Question 35: What is the normal serum sodium concentration range?

125–135 mEq/L
120–130 mEq/L
135–145 mEq/L (Correct answer)
145–155 mEq/L

Correct answer: 135–145 mEq/L

Normal serum sodium ranges from 135 to 145 mEq/L; values outside this range indicate hypo- or hypernatremia.

Question 36: Which antibiotic combination provides both gram-negative and MRSA coverage for empiric septic shock therapy?

Ciprofloxacin + clindamycin
Vancomycin + piperacillin-tazobactam or meropenem (Correct answer)
Amoxicillin + metronidazole
Azithromycin + ceftriaxone

Correct answer: Vancomycin + piperacillin-tazobactam or meropenem

Vancomycin covers MRSA and gram-positive organisms, while piperacillin-tazobactam or meropenem covers broad gram-negative pathogens including Pseudomonas.

Question 37: Sepsis-3 defines sepsis as life-threatening organ dysfunction caused by a dysregulated host response to infection, identified clinically by a SOFA score change of how many points?

≥ 1 point
≥ 2 points (Correct answer)
≥ 3 points
≥ 4 points

Correct answer: ≥ 2 points

Sepsis-3 criteria use an acute SOFA score increase of ≥ 2 points to identify organ dysfunction associated with infection.

Question 38: Pulsus paradoxus greater than 10 mmHg is associated with which condition?

Mitral regurgitation
Left ventricular failure
Cardiac tamponade (Correct answer)
Aortic stenosis

Correct answer: Cardiac tamponade

Cardiac tamponade compresses the heart, causing exaggerated inspiratory drops in systolic BP exceeding 10 mmHg (pulsus paradoxus).

Question 39: A patient with polyuria (>300 mL/hr), hypernatremia, and very dilute urine (specific gravity 1.001) in the ICU most likely has which condition?

Primary polydipsia
Diabetes insipidus (Correct answer)
SIADH
Hyperglycemic hyperosmolar state

Correct answer: Diabetes insipidus

Diabetes insipidus causes massive free water loss due to absent or ineffective ADH, resulting in dilute urine, hypernatremia, and polyuria.

Question 40: Electrical alternans on ECG is most associated with which diagnosis?

Cardiac tamponade (Correct answer)
Hypokalemia
Brugada syndrome
Hypertrophic cardiomyopathy

Correct answer: Cardiac tamponade

Electrical alternans (beat-to-beat alternation of QRS axis/amplitude) results from the heart swinging within a large pericardial effusion, indicating tamponade.

Question 41: Which hemodynamic pattern is classic for cardiogenic shock?

High CO, low SVR, low PCWP
Low CO, low SVR, low PCWP
Low CO, high SVR, high PCWP (Correct answer)
High CO, high SVR, low PCWP

Correct answer: Low CO, high SVR, high PCWP

Cardiogenic shock is characterized by low cardiac output, compensatory high systemic vascular resistance, and elevated pulmonary capillary wedge pressure reflecting fluid backup.

Question 42: What does a PaO2/FiO2 ratio less than 200 indicate?

Moderate ARDS
Severe ARDS (Correct answer)
Respiratory alkalosis
Mild hypoxemia

Correct answer: Severe ARDS

A P/F ratio less than 200 mmHg with bilateral infiltrates and appropriate clinical context defines severe ARDS per the Berlin definition.

Question 43: Ventilator-associated pneumonia (VAP) prevention bundles include which intervention?

Prone positioning every 4 hours
Daily sedation vacation and spontaneous breathing trials (Correct answer)
Continuous antibiotic prophylaxis
Routine bronchoscopy every 48 hours

Correct answer: Daily sedation vacation and spontaneous breathing trials

Daily sedation interruption and spontaneous breathing trials reduce ventilator days — the primary risk factor for VAP — and are core VAP bundle elements.

Question 44: A patient's SpO2 drops from 96% to 88% after suctioning. What is the best immediate action?

Increase PEEP by 5 cmH2O
Administer a bronchodilator
Reconnect to ventilator and increase FiO2 temporarily (Correct answer)
Order a chest X-ray

Correct answer: Reconnect to ventilator and increase FiO2 temporarily

After suctioning, reconnecting to supplemental oxygen and temporarily increasing FiO2 rapidly corrects hypoxemia caused by the interruption of ventilation.

Question 45: What is the recommended CPR compression-to-ventilation ratio for adults with an advanced airway in place?

Continuous compressions at 100–120/min with 1 breath every 6 seconds (Correct answer)
15:2
50:1
30:2

Correct answer: Continuous compressions at 100–120/min with 1 breath every 6 seconds

Once an advanced airway is secured, continuous chest compressions at 100–120/min are given while ventilations are delivered asynchronously at 1 breath every 6 seconds.

Question 46: What is the appropriate initial energy for defibrillation of ventricular fibrillation with a biphasic defibrillator?

120–200 J (Correct answer)
100 J
50 J
360 J

Correct answer: 120–200 J

Biphasic defibrillators typically use 120–200 J for the initial shock in ventricular fibrillation, following manufacturer recommendations.

Question 47: In acute decompensated heart failure, what is the primary goal of IV nitroglycerin?

Improve coronary perfusion only
Reduce preload and afterload to decrease pulmonary congestion (Correct answer)
Increase heart rate
Increase cardiac output directly

Correct answer: Reduce preload and afterload to decrease pulmonary congestion

Nitroglycerin dilates venous and arterial beds, reducing both preload and afterload and rapidly relieving pulmonary congestion in acute heart failure.

Question 48: What is the most common cause of hyponatremia in ICU patients?

Diabetes insipidus
Hyperglycemia
Excessive sodium intake
Syndrome of Inappropriate Antidiuretic Hormone (SIADH) (Correct answer)

Correct answer: Syndrome of Inappropriate Antidiuretic Hormone (SIADH)

SIADH causes inappropriate free water retention, diluting serum sodium and is the most frequent cause of hyponatremia in hospitalized ICU patients.

Question 49: Which hand hygiene agent is most effective against Clostridioides difficile spores?

Povidone-iodine solution
Soap and water (mechanical removal) (Correct answer)
Chlorhexidine-based scrub
Alcohol-based hand rub (ABHR)

Correct answer: Soap and water (mechanical removal)

Alcohol-based hand rubs do not kill C. difficile spores; soap and water mechanically remove spores from hands and are required when C. diff is suspected.

Question 50: Which clinical finding indicates adequate fluid resuscitation in septic shock?

Absence of fever
Normal white blood cell count
Heart rate < 100 bpm alone
MAP > 65, improving lactate clearance ≥ 10%, and improving urine output (Correct answer)

Correct answer: MAP > 65, improving lactate clearance ≥ 10%, and improving urine output

Resuscitation endpoints include MAP ≥ 65 mmHg, lactate clearance of ≥ 10% (targeting normalization), and improving urine output as markers of restored perfusion.

Fundamentals of Critical Care Support (FCCS)

The FCCS course from the Society of Critical Care Medicine trains non-intensivists to manage critically ill patients during the first 24 hours until specialist care is available. A posttest with a 70% passing score is required for course completion and certificate issuance.

Questions

60 min

Time Limit

70%

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