ABP Pediatric Critical Care Medicine common mistakes
ABP Pediatric Critical Care Medicine · Understand the traps and how to avoid them.
Selecting a ventilator strategy from the name of the mode (APRV, HFOV, PRVC) before naming the dominant physiologic defect in the stem's blood gas and exam findings.
Mode names carry an aura of sophistication, and candidates who have memorized branded strategies try to match the stem to a label instead of to the physiology the stem actually describes.
What to do instead
Before looking at options, write one line: is the failure oxygenation, ventilation, compliance, or resistance? Then keep only interventions that change that variable and discard options whose primary effect is on a different one.
Giving a fluid bolus to any hypotensive child before classifying the shock state, including children whose stem shows distended neck veins, muffled heart sounds, or a new murmur.
Trauma and sepsis algorithms drill 'hypotension equals hypovolemia', so the reflex fires before the candidate integrates the cardiac exam and the mechanism of shock.
What to do instead
Classify first as distributive, hypovolemic, cardiogenic, or obstructive using the perfusion exam and filling pressures, then choose the intervention that matches; in cardiogenic or obstructive shock, inotropes or drainage precede volume.
Naming empiric antimicrobials from the most likely organism alone and ignoring the single host factor in the stem that changes coverage, such as asplenia, neutropenia, complement deficiency, an indwelling central line, or recent broad-spectrum exposure.
Pattern recognition to common pediatric pathogens is fast and comfortable, and host risk factors are buried mid-stem rather than in the presenting complaint.
What to do instead
Scan the past medical history, device list, and medication list before selecting drugs; add antimethicillin-resistant Staphylococcus aureus, antipseudomonal, or antifungal coverage only when a specific listed risk factor justifies it.
Choosing sustained hyperventilation to a PaCO2 in the mid-20s as routine management of elevated intracranial pressure rather than as a rescue maneuver for active herniation.
The coupling between CO2 and cerebral blood volume is taught early and vividly, so candidates apply the most memorable number rather than the most time-limited indication.
What to do instead
Default to normocapnia with sedation, head elevation, and osmotherapy; reserve brief hyperventilation for signs of herniation and remember that prolonged hypocapnia causes cerebral ischemia and rebound edema.
Selecting computed tomography of the head or abdomen as the next step in a hemodynamically unstable trauma patient, or accepting an injury pattern without asking whether the stated mechanism could produce it.
Diagnostic certainty feels like progress, and the mechanism-to-injury consistency check is the step candidates skip because it is not a test they can order.
What to do instead
Resuscitate and stabilize before imaging, choosing bedside modalities such as ultrasound when a decision is needed immediately, and always test the stated mechanism against the injury pattern and developmental stage of the child.
Answering acid-base and toxicology items by gestalt instead of calculating the anion gap, the corrected sodium for hyperglycemia, or the osmolal gap.
Calculations feel time-consuming under a timed exam, so candidates trust the qualitative impression of 'gap acidosis' and then carry an arithmetic error into the answer choice.
What to do instead
Perform the calculation on scratch paper every time, and compare the result to the reference range the question provides; a mixed disorder is usually the intended answer when the numbers do not close.
Choosing a resuscitation drug dose or route from memory without checking the decimal, most commonly confusing intravenous epinephrine at 0.01 mg/kg with the tenfold intratracheal dose or the 0.1 mg/kg anaphylaxis dose.
Several epinephrine concentrations and doses are correct in different contexts, so a single memorized number gets applied to the wrong scenario.
What to do instead
Reconstruct the dose from the concentration and the intended volume, and name the indication in your head before selecting; if two options differ tenfold, the question is testing exactly that distinction.
Answering ethics items with absolutist rules such as 'parents always decide', 'always do everything', or 'never withdraw support', rather than applying the best-interest standard and the distinction between withholding and withdrawing.
Candidates fear the appearance of ethical relativism and reach for the most conservative-sounding option, which is often the least defensible pediatric standard.
What to do instead
Frame every option in terms of the child's best interest, the standard of care, and the legitimacy of surrogate decisions; remember that withdrawing and withholding are treated as ethically equivalent when the burdens outweigh the benefits.
Continuing noninvasive ventilation or high-flow oxygen in a child whose stem shows rising work of breathing, worsening encephalopathy, or inability to protect the airway, instead of escalating to intubation.
Noninvasive support is framed as a way to avoid intubation, so candidates treat failure of that support as a reason to persist rather than as a trigger to escalate.
What to do instead
Ask whether the patient is improving, plateaued, or deteriorating on the chosen support, and let the trajectory rather than the modality determine the answer; treat encephalopathy and fatigue as escalation signals.
Attributing refractory shock in a septic or postoperative child entirely to volume and vasopressors while leaving unmeasured glucose, calcium, cortisol sufficiency, and thyroid status out of the answer.
The vasopressor titration question dominates attention once the word 'refractory' appears, and the metabolic contributors sit in a lab panel the candidate skims past.
What to do instead
When shock fails to respond, run a fixed checklist of reversible contributors: hypoglycemia, hypocalcemia, adrenal insufficiency, hypothyroidism, tamponade, pneumothorax, and ongoing bleeding; the answer is usually one of these rather than another pressor.