CPAN common mistakes
CPAN · Understand the traps and how to avoid them.
Applying Phase I monitoring and discharge rules (vital signs every 5–15 minutes, Aldrete score ≥8 plus mandatory Phase I stay) to a patient who is actually in Phase II, or assuming time-in-unit alone means the patient is discharge-ready.
Candidates memorize one set of numbers and reuse them for every stem, because the phases blur together when the question does not literally say 'Phase I' or 'Phase II'. Time-based readiness feels intuitive and is reinforced by real-unit routines.
What to do instead
Before answering any monitoring or discharge item, explicitly label the phase from the stem cues (anesthetic burden, airway intervention, level of care). Then apply phase-specific frequency and criteria; state in your rationale that elapsed time is never a discharge criterion by itself.
Collecting preoperative risk data (STOP-BANG score, known difficult airway, baseline cognitive impairment, home benzodiazepine/opioid use) as isolated facts without converting them into a specific postoperative monitoring or positioning plan for the same patient.
Preop and postop content get studied as separate chapters, so the data never get carried forward into the plan-of-care question. Under time pressure, candidates answer from the postop half of the stem only.
What to do instead
Practice linking each preop finding to a named postop action (e.g., OSA screen positive → continuous capnography/pulse oximetry, lateral or ramped positioning, minimized sedatives). When a stem includes a preop detail, ask 'what does this change downstream?' before choosing.
Choosing a standard adult IV opioid dose for an older adult, a patient with OSA, or a patient receiving concurrent sedatives, and failing to titrate small incremental doses to effect.
Memorized milligram doses feel authoritative, and stems rarely state 'reduce the dose.' Age-related changes in clearance, lean body mass, and synergistic sedation are easy to overlook when the question emphasizes pain score.
What to do instead
For any analgesic item, first scan for age >65, OSA, renal/hepatic impairment, and concurrent benzodiazepines or antihistamines. Default to the smallest effective increment with reassessment between doses, and include sedation level and respiratory rate in the evaluation criteria you choose.
Selecting a PONV or analgesic adjunct without checking patient-specific contraindications - repeating ondansetron doses in a patient with QT prolongation, giving ketorolac to a patient with renal impairment or GI bleed risk, or defaulting to meperidine for postanesthesia shivering.
These agents are learned as 'the PONV drug' and 'the shivering drug,' so the drug class is recalled faster than the contraindication list. Stems that bury the lab value or history reward skipping that check.
What to do instead
Answer these items in two steps: name the symptom, then run a rapid contraindication screen (QT, renal function, bleeding risk, age, seizure history) before selecting. Practice matching each drug to a one-line 'do not use when' rule until it is automatic.
Treating a reassuring SpO2 as evidence of adequate ventilation in a patient receiving supplemental oxygen, and therefore not escalating for a rising PaCO2 or decreasing respiratory rate.
Oxygen saturation is the most familiar number on the monitor and is displayed continuously, while ventilation must be inferred. Candidates conflate oxygenation with ventilation because both are 'breathing' problems.
What to do instead
When an item involves sedation, opioids, or OSA, ask separately: is oxygenation adequate AND is ventilation adequate? Choose assessments that measure ventilation directly (respiratory rate, capnography/ETCO2, sedation scale) and treat a normal SpO2 on oxygen as non-reassuring in a hypoventilating patient.
Managing stridor with bronchodilators or managing diffuse wheeze with jaw thrust, suction, and CPAP alone - that is, mixing up laryngospasm and bronchospasm treatment sequences.
Both present as distressed breathing with abnormal sounds, and both are taught in the same airway section, so the labels get swapped under pressure. The trigger context (extubation/suctioning versus asthma/histamine release) is often the only differentiator in the stem.
What to do instead
Anchor each to its mechanism and first move: laryngospasm = vocal cord closure → 100% oxygen, jaw thrust, gentle positive pressure, deepen anesthesia, then small-dose succinylcholine if sustained; bronchospasm = lower airway narrowing → auscultate wheeze, bronchodilator, consider histamine/allergic cause. Pick treatment only after naming the anatomic level.
Attributing early postanesthesia hypotension reflexively to residual anesthetic or 'expected vasodilation' without first excluding hypovolemia, ongoing surgical bleeding, or anaphylaxis, and without trending pulse pressure and heart rate together.
The anesthesia explanation is the most available one in a perianesthesia stem, and a single blood pressure value looks like enough information. Candidates also under-use the pattern (narrow pulse pressure plus tachycardia equals volume loss) because it requires integrating two numbers.
What to do instead
Force a differential every time: volume, pump, tone, obstruction, anaphylaxis. Then look for the confirming pattern in the data given (trend across readings, heart rate response, pulse pressure, urine output, drain output). Choose the intervention that tests or treats the most dangerous cause first.
Missing the earliest signs of malignant hyperthermia - masseter muscle rigidity after succinylcholine, unexplained rising ETCO2 despite adequate minute ventilation, tachycardia with mixed acidosis - and instead treating the case as inadequate anesthesia or pain.
The classic teaching emphasizes hyperthermia, which is a late sign, so candidates wait for a temperature rise that the stem deliberately has not yet provided. Early MH looks like several common postanesthetic problems at once.
What to do instead
Learn the trigger-plus-pattern rule: volatile agent or succinylcholine plus rising ETCO2 unresponsive to increased ventilation, masseter spasm, or unexplained tachycardia/acidosis. When that constellation appears, stop the trigger, call for help, and prepare dantrolene rather than titrating more anesthesia.
Handling a suspected local anesthetic systemic toxicity event by giving epinephrine as the primary treatment or by using the wrong lipid emulsion dosing, instead of following the LAST checklist.
Epinephrine is the reflex answer for cardiovascular collapse, and LAST is studied as a rare pharmacology footnote rather than a step-by-step protocol. The dose details are seldom rehearsed.
What to do instead
Memorize LAST as a sequence: stop injection, airway/100% oxygen, benzodiazepine for seizures, 20% lipid emulsion bolus and infusion, and reduced epinephrine doses (small aliquots) if vasopressor is needed, with prolonged observation. Rehearse the numbers so the protocol, not the reflex, drives the answer.
Providing technically correct discharge instructions that omit the practical advocacy elements - a responsible adult escort, a specified observation window before driving or operating machinery, and explicit return precautions - or answering scope-of-practice/advocacy items from personal habit rather than ASPAN standards and facility policy.
Education and advocacy feel like 'common sense' content, so candidates answer from what their own unit does instead of from standards, and they under-weight the logistics that actually determine safe discharge.
What to do instead
Build a fixed discharge-teaching checklist (escort and transport, no driving/decision-making for 24 hours, no alcohol or sedatives, when to call, who to call, written instructions given and understood). For professional-practice items, answer from the standard or policy named in the stem, and use teach-back as the default verification method.