CICM First Part common mistakes
CICM First Part · Understand the traps and how to avoid them.
When asked to interpret a blood gas or acid-base problem, the candidate calculates the anion gap and delta ratio but never states the primary disorder, the expected compensatory response, or whether compensation is appropriate, so the answer stops at numbers without a diagnosis.
Candidates rehearse formulas (Henderson-Hasselbalch, Winter's formula, anion gap, delta-delta) as isolated calculations and are never drilled to close the loop from arithmetic to a synthesised acid-base diagnosis, so under time pressure the memorable step (the sum) crowds out the interpretive step.
What to do instead
Practise a fixed written template for every acid-base question: state pH and primary disorder, calculate the expected compensation and compare, then state the anion gap and delta ratio if metabolic acidosis is present, then give the final combined diagnosis in one sentence. Answer past questions using only this template until the closing synthesis becomes automatic.
On a ventilation or respiratory physiology question, the candidate recites definitions (compliance, resistance, dead space, shunt fraction) but cannot apply them to the specific scenario, for example failing to explain why raising PEEP improves or worsens oxygenation in the patient described.
Physiology is learned as separate lecture facts rather than as a causal model, and candidates rarely practise linking a named equation to a bedside change, so they recognise the term but cannot reason with it.
What to do instead
For each core equation (compliance = volume/pressure, shunt equation, alveolar gas equation, oxygen delivery = cardiac output x content), write one worked example applying it to a ventilated patient and one sentence on what changing a variable does clinically. Rehearse these worked links rather than the bare definitions.
When presented with a shocked or deteriorating patient scenario, the candidate lists every possible cause and every investigation without committing to a most likely diagnosis, initial resuscitation priorities, and a time-critical action.
Fear of being wrong encourages exhaustive hedging, and candidates have not practised prioritisation under exam conditions, so they produce a comprehensive but unstructured list that earns few marks for clinical reasoning.
What to do instead
Answer in an explicit order: immediate life threats and resuscitation first, then a ranked differential with the single most likely diagnosis stated, then confirmatory tests, then definitive management. Practise saying 'the most likely diagnosis is X because of A and B' out loud in timed conditions.
On paediatric scenarios the candidate applies adult thresholds and doses directly, for example using adult normal ranges for heart rate, respiratory rate, and blood pressure, or quoting adult drug doses without weight-based recalculation.
Most study material and clinical exposure is adult-focused, and adult numbers are more firmly memorised, so they are retrieved by default even when the question clearly concerns a child.
What to do instead
Build and repeatedly test an age-banded reference table of normal vital signs and weight-based doses for neonates, infants, and older children, and make it a habit to state the child's weight and the calculated dose explicitly in every paediatric answer before writing it.
In paediatric resuscitation questions the candidate describes adult-sized equipment and sequences, omitting the weight-based sizing of airway devices, defibrillation energy, and fluid boluses appropriate to the child described.
Adult advanced life support algorithms are overlearned and are retrieved automatically, while paediatric-specific modifications are less frequently rehearsed and are easily dropped under time pressure.
What to do instead
Rehearse the paediatric resuscitation sequence as a checklist that always includes estimated weight, weight-based energy and drug doses, and equipment sizing. Practise stating these numbers for three or four representative weights until the calculation is routine.
When a neonate or infant presents with respiratory distress or apnoea, the candidate anchors on a single diagnosis such as bronchiolitis and omits the wider neonatal differential including sepsis, congenital heart disease, metabolic disease, and surgical causes.
Pattern recognition from common presentations is efficient but premature closure occurs because candidates have not been trained to deliberately broaden the differential in the youngest age group, where signs are non-specific.
What to do instead
Use a structured 'must-not-miss' list for any young infant with respiratory signs: infection, cardiac, metabolic, surgical, and airway causes. Write the list from memory before reading answer options, and explicitly exclude or include each category in the final answer.
On anaesthesia pharmacology questions the candidate quotes an induction dose or a MAC value without adjusting for the patient's age, comorbidity, hypovolaemia, or co-administered drugs, giving a single textbook number as if it applied universally.
Drug facts are memorised as fixed values for a standard adult, and the modifying factors (pharmacokinetic and pharmacodynamic variability) are learned separately and not integrated with the numbers.
What to do instead
For each core anaesthetic drug, learn the standard dose plus the two or three factors that most change it, and practise answering with the phrase 'in this patient I would reduce or increase X because of Y'. Test yourself by varying the patient rather than reciting the dose.
When asked to assess or manage acute pain, the candidate describes a single analgesic and dose but omits a multimodal plan, contraindications, monitoring for toxicity, and the reassessment step.
Pain is often studied as a list of drugs and receptor targets, and candidates are not used to presenting analgesia as a structured plan with safety checks, so the answer is a drug name rather than a management strategy.
What to do instead
Answer pain questions with a fixed structure: assess severity and type, choose multimodal agents with doses and routes, state contraindications and monitoring (for example sedation and respiratory monitoring with opioids, or maximum local anaesthetic dose), then state when and how you will reassess.
On internal medicine questions the candidate lists investigations before completing a focused history and examination, and does not prioritise the single test most likely to confirm or refute the leading diagnosis.
Investigation-heavy learning and the reassurance of 'ordering everything' substitute for clinical reasoning, and candidates have not practised committing to a discriminating test under time constraints.
What to do instead
For each system, learn the two or three findings on history and examination that most change the differential, and practise answering with a leading diagnosis, the one discriminating test, and the reason it is discriminating before listing secondary tests.
When managing a critically ill patient over time, the candidate focuses only on the acute resuscitation and omits complications of the ICU stay such as ventilator-associated pneumonia, delirium, thromboembolism, glycaemic control, nutrition, and sedation strategy.
Resuscitation is dramatic and well rehearsed, whereas ongoing critical care is a set of less memorable preventive measures, so candidates default to the acute phase and stop there.
What to do instead
Keep a written daily ICU checklist (sedation and delirium, ventilator care, thromboembolism prophylaxis, glycaemic control, nutrition, lines and devices, pressure areas) and practise answering longitudinal scenarios by walking through the checklist explicitly to demonstrate comprehensive ongoing management.