Egyptian Board Critical Care common mistakes
Egyptian Board Critical Care · Understand the traps and how to avoid them.
In volume-control ventilation, adjusting tidal volume by predicted body weight calculated from the patient's actual weight (or simply accepting the ventilator's default 500 mL), so a 160 cm woman with ARDS receives 9–10 mL/kg PBW instead of the lung-protective 6 mL/kg.
Candidates memorize '6 mL/kg' but not the PBW formulas (male: 50 + 0.91 × [height in cm − 152.4]; female: 45.5 + 0.91 × [height in cm − 152.4]), and ICU charts display actual weight prominently. The error is invisible unless plateau pressure is checked, so it goes uncorrected.
What to do instead
Before touching the ventilator, calculate and write PBW on the bedside card. Set VT = 6 mL/kg PBW, then titrate down to 4 mL/kg if plateau pressure exceeds 30 cmH2O. Recheck PBW-derived VT at every handover and document both actual and predicted weight in the notes.
On a patient with undifferentiated shock, ordering a fluid bolus and starting norepinephrine before recording a structured hemodynamic picture (MAP, CVP trend, capillary refill, lactate, ScvO2 or POCUS cardiac assessment), then declaring 'fluid-refractory septic shock' when pressure does not respond.
Exam vignettes and real resuscitations reward immediate action, so candidates anchor on sepsis and skip the four-type discrimination (hypovolemic, cardiogenic, distributive, obstructive). Without pre-load responsiveness or an ejection-fraction estimate, the label 'septic' is an assumption, and the real diagnosis (tamponade, RV failure, massive PE) is missed.
What to do instead
Use a mandatory sequence: confirm shock (MAP <65 or lactate >2 with hypoperfusion signs) → classify with focused echo or passive leg raise/PLR plus a fluid challenge of 250–500 mL → reassess after each bolus. State the shock type explicitly in your answer or note before committing to vasopressors or fluids.
Treating a single lactate of 3–4 mmol/L as proof of sepsis and giving repeated boluses to 'clear lactate', without checking for other causes (seizure, metformin, liver failure, epinephrine infusion, tourniquet artifact) and without measuring lactate clearance over time.
Surviving Sepsis bundles have made 'lactate = sepsis' a reflex, and candidates confuse a marker of hypoperfusion with a resuscitation target. They also forget that a single value says nothing about trajectory, and that epinephrine itself raises lactate by β2 stimulation.
What to do instead
Interpret lactate as a perfusion marker, not a diagnosis. Repeat in 2–4 hours and judge clearance (≥10–20% fall). If lactate is high with normal perfusion and no shock, actively list alternative causes before escalating fluids; stop boluses once dynamic measures show no fluid responsiveness.
Continuing empirical broad-spectrum antibiotics beyond 48–72 hours without de-escalation, and never obtaining cultures before the first dose; then, when cultures return, ignoring them because 'the patient is improving'.
Candidates fear under-treating sepsis more than over-treating, and stewardship is perceived as a 'later' topic. Blood cultures are often drawn after antibiotics in the rush, destroying yield, and no one is assigned to review results at 48–72 hours.
What to do instead
Adopt a fixed loop: cultures and procalcitonin (where used) before the first dose → reassess at 48–72 h with clinical response, culture results, and biomarkers → narrow, stop, or switch to oral. Document the de-escalation decision explicitly, including when you choose to continue and why.
Managing new atrial fibrillation in a critically ill patient by reflexively giving a large IV bolus of a rate-control agent (e.g., 20 mg diltiazem, 10 mg metoprolol) without assessing LV function, volume status, or whether the arrhythmia is driving the hypotension.
Candidates treat AF as an outpatient rate-control problem and forget that critical illness AF is often catecholamine- or sepsis-driven and that negative inotropes can precipitate cardiogenic shock in a failing ventricle. They also forget that unstable AF with hypotension requires synchronized cardioversion, not drugs.
What to do instead
First decide stability: hypotension, ischemia, or pulmonary edema → synchronized cardioversion. If stable, assess EF and volume status (POCUS), correct triggers (electrolytes, sepsis, hypoxia, pain), then use small titrated doses of a rate-control agent matched to ventricular function, or amiodarone when EF is reduced.
In a patient with acute brain injury, correcting only PaO2 and ignoring PaCO2 and mean arterial pressure: allowing hyperventilation to a PaCO2 of 25–28 mmHg 'because the saturation is fine', or accepting MAP of 60 in a traumatic brain injury patient.
Ventilator settings are titrated to oxygenation, and CO2 is treated as an incidental number. Candidates forget that hypocapnia causes cerebral vasoconstriction and ischemia, and that cerebral perfusion pressure depends on MAP, so permissive hypotension protocols from trauma are misapplied to head injury.
What to do instead
Target normocapnia (PaCO2 35–38 mmHg) in brain injury; reserve short-term hyperventilation to 30–35 mmHg only for impending herniation as a bridge. Maintain CPP 60–70 mmHg with fluids and vasopressors, and document the explicit PaCO2 and MAP targets at handover.
Correcting sodium by formula alone (e.g., hypertonic saline for hyponatremia, free water for hypernatremia) without first classifying volume status and urine osmolality, and without a rate cap; or correcting chronic hyponatremia faster than 8–10 mmol/L in 24 hours.
Candidates memorize correction formulas but skip the diagnostic step (hypovolemic vs euvolemic/SIADH vs hypervolemic), so they give the wrong fluid. They also underestimate osmotic demyelination risk and do not plan serial sodium checks.
What to do instead
Classify first: clinical volume status, urine Na and osmolality, serum osmolality, glucose, and medications. Then set an explicit target (e.g., ≤8 mmol/L rise in 24 h in chronic hyponatremia), check sodium every 4–6 h during active correction, and write the plan for overcorrection (D5W plus desmopressin) before starting.
In diabetic ketoacidosis, stopping the insulin infusion when glucose reaches 200–250 mg/dL, or starting bicarbonate because pH is 7.10, or omitting potassium replacement when K is 5.2 mmol/L but total-body potassium is depleted.
Glucose normalization is treated as the endpoint, and pH is treated as the treatment target. Candidates forget that ketoacidosis resolution requires closure of the anion gap, that insulin drives potassium intracellularly, and that bicarbonate can worsen intracellular acidosis and hypokalemia.
What to do instead
Treat to anion-gap closure, not glucose: add dextrose when glucose <200–250 mg/dL and continue insulin until gap ≤12 and ketones clear. Replace potassium when K <5.2–5.5 with adequate urine output, and reserve bicarbonate for pH <6.9 or life-threatening hyperkalemia.
In trauma and burns, calculating resuscitation from formulas alone (e.g., 4 mL/kg/%TBSA or 2 mL/kg/%TBSA) and chasing the number, while neglecting urine output trends, burn depth/compartment pressure, and the lethal triad (hypothermia, acidosis, coagulopathy); or missing that a burn patient with hoarseness or stridor needs early intubation.
Candidates want a single correct number, and formulas feel examinable. They under-weight bedside endpoints (urine output 0.5–1 mL/kg/h, mentation, lactate) and airway red flags, and they forget that over-resuscitation causes edema, abdominal and extremity compartment syndromes.
What to do instead
Use formulas only as a starting rate, then titrate to urine output and perfusion, reassessing hourly. Examine for circumferential burns and compartment syndrome, actively rewarm and correct coagulopathy, and intubate early for facial burns, soot, hoarseness, or stridor before edema closes the airway.
In poisoned or overdosed patients, giving a fixed antidote or decontamination step without confirming the toxidrome and time course (e.g., naloxone for a mixed overdose with normal pupils, flumazenil in a benzodiazepine-plus-tricyclic overdose, or gastric lavage hours after ingestion), and forgetting the ECG and repeated co-oximetry.
Candidates learn antidotes as paired associations and apply them to any 'overdose' vignette. They skip toxidrome-based reasoning, ignore contraindications, and forget that flumazenil can precipitate seizures and that salicylate or CO poisoning can present with normal or misleading pulse oximetry.
What to do instead
Work through a fixed toxidrome grid (vitals, pupils, skin, bowel sounds, secretions), get an ECG (QRS, QTc), co-oximetry, and repeated levels with timing. Justify each antidote by toxidrome and contraindication, and state the endpoint for repeating doses (e.g., naloxone titrated to respiratory rate, not full wakefulness).
In a rapid sequence intubation, choosing a paralytic and induction dose without assessing hemodynamic reserve and airway difficulty, giving the standard dose to a shocked patient, and failing to plan for post-intubation hypotension and a failed airway.
Candidates rehearse the sequence as a checklist (preoxygenate, induce, paralyze, tube) but not the patient-specific physiology. They forget that propofol and high-dose induction agents drop MAP in shock, that ketamine is preferred in hemodynamic instability, and that a failed airway plan must be verbalized before paralysis.
What to do instead
Before induction, state the plan aloud: hemodynamic target, agent and dose adjusted to shock, anticipated difficult airway and backup (video laryngoscopy, supraglottic device, surgical airway), and post-intubation sedation and vasopressor readiness. Reassess pressure immediately after intubation and treat hypotension proactively.
In end-of-life and ICU administration scenarios, writing 'full code' or 'DNR' without a documented goals-of-care conversation, or making a unilateral decision to withdraw life support without involving the family and documenting capacity, surrogate, and cultural/religious considerations.
Candidates treat code status as a checkbox and avoid difficult conversations, or over-correct by deciding for the family. They forget that Egyptian practice and law require documented consent processes, that capacity assessment must precede surrogate decision-making, and that withdrawal of support is a process, not a single order.
What to do instead
Document a structured conversation: patient capacity, surrogate identity, values and goals, prognosis, and the agreed plan including code status, ventilation, dialysis, and nutrition. Revisit at each family meeting, record who said what, and involve palliative care and ethics committees early when conflict exists.
Managing sedation with a fixed continuous infusion (e.g., midazolam plus fentanyl at unchanging rates) and never performing a daily sedation interruption or delirium screen, while under-feeding or over-feeding the patient and ignoring the risk of ICU-acquired weakness, VAP, and pressure injuries.
Candidates focus on the acute resuscitation and treat sedation, nutrition, and complications as background. They do not link deep sedation to longer ventilation and delirium, and they forget that caloric targets and protein needs must be recalculated and that daily awakening is contraindicated only in specific situations.
What to do instead
Write a daily bundle: sedation target (RASS) with daily interruption when safe, CAM-ICU delirium screen, spontaneous breathing trial readiness, nutrition calculated by ideal body weight with protein 1.2–2 g/kg, and skin, mouth, and VTE prophylaxis checks. Document the bundle elements and the reason for any deviation.