ABIM Neurocritical common mistakes
ABIM Neurocritical · Understand the traps and how to avoid them.
Reverses warfarin-related intracerebral hemorrhage with vitamin K alone, or with fresh frozen plasma as the primary agent, and does not confirm the INR has corrected before moving on.
Habit carried over from non-emergent anticoagulation reversal, discomfort with weight-based 4-factor prothrombin complex concentrate dosing, and a belief that 'vitamin K plus FFP is the standard' from older teaching.
What to do instead
Give 4F-PCC weight/INR-adjusted (roughly 25-50 units/kg) plus IV vitamin K 10 mg for warfarin-associated ICH, recheck INR at 15-30 minutes, and have a drug-specific plan for DOACs (idarucizumab for dabigatran; andexanet alfa or 4F-PCC for factor Xa inhibitors) with the last dose and renal function documented.
Keeps a severe TBI patient hyperventilated to a PaCO2 of 25-30 mm Hg for hours or days as maintenance ICP therapy rather than as a brief bridge.
Hyperventilation produces an immediate, visible drop in ICP, which reinforces the behavior; candidates conflate a rescue maneuver with sustained therapy and underuse sedation, osmotherapy, CSF drainage, and temperature control.
What to do instead
Target PaCO2 35-38 mm Hg routinely; reserve hyperventilation to 30-35 mm Hg (avoid <25) for acute herniation or abrupt deterioration as a bridge to definitive treatment, and confirm with arterial gases or end-tidal CO2 rather than eyeballing the ventilator.
Orders a single 20-30 minute routine EEG to 'rule out' nonconvulsive seizures in a patient who remains comatose after a witnessed convulsion or has unexplained fluctuating encephalopathy, and stops after one unrevealing study.
Routine EEG is easier to order and quicker to get than continuous monitoring, and a normal short tracing feels reassuring; continuous EEG access is treated as a resource constraint rather than a clinical indication.
What to do instead
Order continuous EEG for at least 24 hours (48 if high risk: after generalized convulsive status, persistent unexplained coma, or while on sedation/neuromuscular blockade) and interpret and treat rhythmic or periodic patterns with the clinical context; if continuous EEG is unavailable, repeat short studies rather than accepting one negative.
Monitors ventilation in Guillain-Barre syndrome with a single vital capacity measurement or waits for a fixed threshold such as VC <1 L before calling for intubation.
Thresholds are memorized as absolutes while trends are ignored; a single reassuring number in a patient who is still talking masks rapid decline, and bulbar and autonomic features are not factored in.
What to do instead
Measure vital capacity, negative inspiratory force, and maximum expiratory pressure every 4-6 hours and act on trajectory: intubate for VC <20 mL/kg, inspiratory force weaker than -30 cmH2O, a >30% fall from baseline, or bulbar dysfunction with aspiration; simultaneously monitor for dysautonomia and start IVIG or plasma exchange.
Delays empiric antibiotics in suspected bacterial meningitis until after head imaging and lumbar puncture are completed, and gives dexamethasone only after the antibiotic course has started.
The taught sequence (image, then tap, then treat) is recalled in the wrong order, and there is a misplaced worry that antibiotics will sterilize the CSF and destroy diagnostic yield.
What to do instead
Draw blood cultures, then give empiric antibiotics plus dexamethasone 0.15 mg/kg every 6 hours before or with the first antibiotic dose; obtain the lumbar puncture as soon as it is safe, and reserve CT for focal deficits, new seizures, papilledema, or immunocompromise.
Proceeds to apnea testing in a potential brain-death determination without first excluding confounders such as residual sedation or neuromuscular blockade, hypothermia, hypotension, or severe electrolyte and acid-base derangement.
The apnea test is treated as the definitive step and the most memorable part of the protocol, so it is reached first; time pressure and prior sedative infusions are underestimated, and prerequisite checklists are not used.
What to do instead
Work through an explicit checklist before any reflex testing or apnea testing: core temperature >36 C, SBP >=100 mm Hg or MAP >=75, no sedating or paralyzing agents (allow ~5 half-lives), normal sodium and glucose, no severe acidosis; then perform a protocolized apnea test to a PaCO2 >=60 mm Hg (or a >=20 mm Hg rise) and use an ancillary study if the test is inconclusive or aborted for instability.
Labels hyponatremia in a patient with subarachnoid hemorrhage as SIADH and fluid-restricts, or corrects sodium faster than 8-10 mmol/L per day.
The SIADH pattern is over-recognized because urine sodium and urine osmolality overlap in cerebral salt wasting; volume status is not systematically assessed, and rapid correction is driven by the desire to see the sodium normalize.
What to do instead
Assess volume status with intake/output, weight, and ultrasound or CVP; treat cerebral salt wasting with isotonic or hypertonic saline replacement rather than restriction; limit correction to <=8-10 mmol/L in 24 hours (lower in high-risk patients), and use boluses of 3% saline only for seizures or coma.
Manages ICP in isolation, using the single ICP number to drive therapy, and does not verify transducer leveling at the tragus or foramen of Monro.
The ICP value is displayed prominently and feels like the objective measure, while the transducer was leveled at insertion or at the bed rail and is never rechecked; cerebral perfusion pressure is not calculated.
What to do instead
Level and zero the transducer at the tragus or foramen of Monro each shift and after any patient movement, confirm a plausible waveform, and interpret ICP together with calculated CPP (MAP minus ICP, target roughly 60-70 mm Hg), the examination, brain tissue oxygen, transcranial Doppler, and imaging.
Continues a high-dose propofol infusion without tracking dose, triglycerides, creatine kinase, lactate, or acid-base status, and never performs a sedation interruption or daily lightening trial in a patient who could tolerate it.
Deep sedation is comfortable for the team and suppresses agitation, early markers of propofol infusion syndrome are unfamiliar, and sedation interruption is avoided for fear of destabilizing ICP or the airway.
What to do instead
Keep propofol at or below 4 mg/kg/h, trend triglycerides, CK, lactate, anion gap, and ECG, and stop the infusion at the first unexplained metabolic acidosis, rhabdomyolysis, bradycardia, or lipemia; build a daily sedation-target review into rounds, and adjust renally cleared drugs such as levetiracetam and morphine metabolites.
Conducts the prognosis and goals-of-care discussion with whichever family member is at the bedside, without identifying the legal surrogate, without an interpreter, and without documenting the decision-maker, the values elicited, or the agreed goals.
Discomfort with these conversations and time pressure push them to the end of the day; multiple consultants deliver fragmented messages, and the surrogate's authority and the patient's own expressed wishes are never established.
What to do instead
Schedule a structured meeting within 72 hours with the documented surrogate and a professional interpreter, confirm decision-making authority, review what is known and what is expected in plain language, elicit the patient's values, agree on explicit goals, document all of it, and involve palliative care early for symptom management and for a protocolized withdrawal plan.