ABA Neurocritical Care common mistakes
ABA Neurocritical Care · Understand the traps and how to avoid them.
Applying a single fixed mean arterial pressure target to every brain-injured patient instead of individualising the CPP goal to the patient's autoregulatory status and injury type.
Candidates memorise one 'magic number' MAP from a guideline and apply it to TBI, SAH, and ischaemic stroke alike, missing that the same CPP may be adequate in one patient and cause hypoperfusion or hyperaemia in another.
What to do instead
For every haemodynamic question, first state the injury type and the assumed autoregulatory state, then justify the CPP/MAP target and name the monitoring (ICP, PbtO2, neurological exam) that would prompt you to adjust it.
Treating a rising ICP as a reflex indication for hyperventilation or high-dose osmotherapy without first checking whether the elevation is real and whether a reversible cause (positioning, tube obstruction, seizure, fever, agitation) is driving it.
Under time pressure, candidates reach for the most dramatic intervention and skip the systematic 'is this artefact, is this a secondary insult' check that precedes tiered ICP management.
What to do instead
Use a fixed sequence for any ICP question: confirm the reading and transducer, correct position/airway/ventilation/temperature/seizure, then escalate therapy in the guideline tier order with the duration and endpoint of each intervention stated.
Misclassifying the cause of a low GCS or new focal deficit as a primary neurological event when the actual driver is a systemic problem such as hypoglycaemia, hyponatraemia, hypercapnia, sepsis, or a drug effect.
Anchoring on the admitting neurological diagnosis makes candidates treat the brain and ignore the systemic physiology that is generating the exam finding.
What to do instead
Before committing to a neurological answer, run a mandatory systemic screen (glucose, sodium, osmolality, CO2, oxygenation, temperature, medication list, haemodynamics) and explicitly state which systemic causes you have excluded and how.
Choosing a fluid or vasopressor strategy by habit (for example, defaulting to hypotonic crystalloid or to a fluid bolus) without checking tonicity, osmolality, and the effect on cerebral oedema and sodium goals.
General critical care habits are strong, and candidates forget that fluid choice in neurocritical care is constrained by osmolality and sodium targets that do not apply to other ICU patients.
What to do instead
For every fluid or resuscitation question, state the solution's tonicity, its effect on serum sodium and osmolality, and the patient's prescribed sodium target before selecting it.
Managing status epilepticus or non-convulsive seizures with a single agent and no defined escalation timeline, or failing to consider EEG in a persistently unresponsive patient.
Candidates know first-line benzodiazepines but cannot produce a time-stamped escalation plan, and they under-use continuous EEG because it is not a bedside reflex.
What to do instead
Rehearse a timed algorithm (benzodiazepine dose, second-line load, then anaesthetic infusion with EEG endpoint) and always ask whether unexplained persistent coma warrants continuous EEG.
Ignoring the interaction between ventilation strategy and cerebral physiology: accepting hypercapnia or hypoxaemia, or hyperventilating prophylactically rather than as a time-limited rescue.
Lung-protective ventilation targets and cerebral blood flow targets can conflict, and candidates default to one without reconciling the other.
What to do instead
For any ventilation question, state PaCO2 and PaO2 targets for that specific injury, the mechanism (CBF and cerebral blood volume effects), and the maximum duration of any deliberate hyperventilation.
Failing to apply reversal and anticoagulation logic to a patient with intracranial haemorrhage: not naming the specific reversal agent, dose, and target, and not stating when anticoagulation may be restarted.
Candidates know that anticoagulation should be reversed but cannot produce agent-specific reversal with dosing and monitoring, and they do not think about the competing thrombotic risk.
What to do instead
For every haemorrhage question, name the offending drug, the specific reversal product and dose, the laboratory or clinical endpoint, and the reasoning for the timing of anticoagulation resumption.
Reading a single sodium or osmolality value in isolation rather than interpreting the trend, the rate of change, and the associated volume status.
Candidates focus on whether the number is inside the reference range and miss that the danger in dysnatraemia lies in the rate of correction and the direction of the change.
What to do instead
Always quote the previous value and the time interval, calculate the rate of change, state the safe correction limit, and link the interpretation to volume status and the underlying neuroendocrine cause.
Prognosticating and recommending limitations of treatment early after severe brain injury without accounting for confounders such as sedation, hypothermia, hypotension, and the mandated observation window.
Candidates want to give a definitive answer and forget that early prognostication is systematically biased by modifiable confounders.
What to do instead
Before any prognostic statement, list the confounders that must be excluded, state the minimum observation period, and describe the multimodal data (exam, imaging, electrophysiology, biomarkers) required.
Answering a management question without naming the monitoring modality, the threshold that would trigger a change, and the endpoint of therapy.
Candidates describe an intervention but not how it will be monitored or when it should be stopped, which is the part that distinguishes a safe plan from a dangerous one.
What to do instead
Use a three-part answer template for every management question: intervention, monitoring parameter with a numeric trigger, and the stopping rule or endpoint.