BCPPS common mistakes
BCPPS · Understand the traps and how to avoid them.
Calculates a weight-based dose (e.g., amoxicillin 90 mg/kg/day, ibuprofen 10 mg/kg, cetirizine) for a 45-kg school-age child and orders the resulting milligram amount without comparing it against the labeled adult maximum dose.
The mg/kg reflex is drilled so heavily in pediatric training that the adult ceiling is treated as an afterthought, and many order-entry screens do not auto-cap at the adult max, so nothing flags the overage.
What to do instead
Before verifying any weight-based order, compute the dose twice - once as mg/kg and once as the adult maximum - and order the lower number; state the cap explicitly in the note (e.g., 'amoxicillin 500 mg PO TID, adult max applied').
Writes 'caffeine 20 mg/kg load, then 5 mg/kg/day' for a 28-week preterm infant without specifying caffeine citrate versus caffeine base, and carries that same number through the maintenance phase without adjusting for postmenstrual age.
Caffeine is ordered in the citrate salt in most US NICUs but in base units elsewhere in the literature, and the two differ by a factor of two, so a plausible-looking number can represent a double or half dose.
What to do instead
Always write the salt form and the base equivalent (citrate load 20-40 mg/kg = base 10-20 mg/kg; citrate maintenance 5-10 mg/kg/day = base 2.5-5 mg/kg/day), and re-check the maintenance dose against current postmenstrual and postnatal age at every handoff.
Schedules MMR and varicella at two separate visits 2 weeks apart for a 15-month-old who is behind on immunizations.
Two live vaccines are often split because of visit logistics or parent preference, and the 28-day rule for live vaccines is overshadowed by the more familiar 4-day grace period for inactivated vaccine intervals.
What to do instead
Either give both live vaccines on the same day or separate them by at least 28 days; if a dose is given too soon, document that it is invalid and revaccinate after the 28-day interval.
Discharges a 7-year-old from the emergency department after an acute asthma exacerbation with a prescription for albuterol alone - no systemic corticosteroid course, no inhaled corticosteroid started or stepped up, and no written asthma action plan.
The visit is framed as an acute bronchodilator problem, the child 'looks better' after nebulizers, and discharge orders default to the rescue inhaler that was already in use.
What to do instead
Bundle every asthma discharge: complete a short systemic corticosteroid course, start or step up controller therapy (ICS or ICS-formoterol), confirm inhaler and spacer technique, and issue a written action plan with follow-up within 3-5 days.
Orders 0.45% sodium chloride with 20 mEq/L KCl at full maintenance rate for a hospitalized toddler with pneumonia or bacterial meningitis.
Older algorithms taught hypotonic maintenance fluid as the default, and the risk of hospital-acquired hyponatremia in children with elevated ADH is easily missed because the child looks hemodynamically stable.
What to do instead
Default to isotonic maintenance fluid (0.9% NaCl with 5% dextrose and 20 mEq/L KCl); if ADH excess is likely (meningitis, pneumonia, postoperative, pain, nausea), use the isotonic fluid at a restricted rate and recheck the sodium within 24 hours.
Gives a 10 mL/kg normal saline bolus followed immediately by an insulin bolus of 0.1 units/kg, then starts a continuous infusion, in a 6-year-old presenting in DKA.
Adult DKA protocols include an insulin bolus and aggressive fluid resuscitation, and those habits transfer unless the learner recalls that pediatric DKA management deliberately omits the bolus.
What to do instead
Resuscitate with 10 mL/kg isotonic fluid, start insulin at 0.05-0.1 units/kg/hr without a bolus after fluids are running, use a two-bag system, add dextrose when glucose falls below ~250-300 mg/dL, and monitor for headache/bradycardia as signs of cerebral edema.
Estimates creatinine clearance with the Cockcroft-Gault equation or unadjusted adult eGFR, or skips renal dose adjustment entirely, before ordering vancomycin, gentamicin, or enoxaparin in a child with a rising serum creatinine.
Adult pharmacokinetic equations are the ones learners use daily, and a single 'normal-looking' creatinine in a small child conceals a markedly reduced GFR.
What to do instead
Use the bedside Schwartz formula (0.413 x height in cm / serum creatinine), compare the result to the age-appropriate normal range, and adjust or extend the interval accordingly; in neonates, use gestational/postmenstrual age-based dosing and monitoring rather than an eGFR equation.
Discharges a 6-month-old newly diagnosed with hemoglobin SS without starting penicillin V prophylaxis, daily folic acid, an aggressive hydration/fever plan, and a documented pneumococcal and meningococcal vaccination catch-up schedule.
The encounter is dominated by the acute pain or anemia that brought the child in, and the preventive bundle is invisible on the discharge problem list.
What to do instead
Use a sickle cell discharge checklist: penicillin V prophylaxis, folic acid, hydroxyurea discussion and referral, functional asplenia counseling with fever instructions, and review of the full pneumococcal series plus meningococcal ACWY/ MenB and annual influenza.
Administers activated charcoal to a drowsy child, or to a child who ingested a caustic or a hydrocarbon, and does so before contacting the poison center.
Charcoal is treated as the universal antidote, and the aspiration risk and contraindications receive less attention than the dose of 1 g/kg.
What to do instead
Confirm airway protection and the absence of caustic/hydrocarbon/alcohol ingestion before giving charcoal, and call the poison center for every pediatric ingestion to make the charcoal, antidote, and observation decisions with a toxicologist.
Dilutes phenytoin in 5% dextrose in water or infuses a 20 mg/kg load faster than 1 mg/kg/min (max 50 mg/min) in a child with status epilepticus.
The urgency of stopping the seizure pushes the infusion rate, and D5W is the fluid already hanging on the pump.
What to do instead
Use fosphenytoin (dosed in phenytoin equivalents, faster and safer) or dilute phenytoin in 0.9% sodium chloride only, filter it, and cap the rate at 1 mg/kg/min (50 mg/min max) with continuous cardiac and blood pressure monitoring.