AMCA PTC common mistakes
AMCA PTC · Understand the traps and how to avoid them.
Answering scope-of-practice items based on what a phlebotomist does in their own facility rather than on the standard legal scope, e.g., choosing 'start an IV line' or 'interpret the test result' as an acceptable task.
Candidates generalise from on-the-job habits and conflate tasks delegated informally with tasks legally permitted for the phlebotomy role.
What to do instead
For each scope item, ask whether the task is a specimen-collection/patient-care task within the phlebotomy standard or a diagnosis, interpretation, or invasive procedure reserved for nurses, physicians, or lab technologists; eliminate answers that involve interpreting results or performing non-phlebotomy procedures.
Selecting 'tell the patient it will be fine' or promising a diagnosis when asked how to respond to an anxious patient or a question about results.
Candidates confuse reassurance with scope; they want to pick the kindest-sounding answer rather than the professionally appropriate one.
What to do instead
Choose answers that acknowledge the patient's concern, explain the procedure, and refer result questions to the provider; never promise outcomes or interpret results.
Choosing to recap a needle or to remove a needle from a syringe by hand when a question describes a sharps exposure scenario or asks for safe disposal steps.
Candidates focus on the 'correct final destination' (sharps container) and overlook the intermediate behaviour that causes the injury.
What to do instead
Apply the rule that needles are never recapped, bent, or manipulated by hand; activate the safety device and drop the entire unit directly into the sharps container.
Answering a 'what do you do first' exposure question with 'report to supervisor' or 'get tested' instead of immediate washing of the site with soap and water.
Candidates remember the reporting and follow-up steps and forget the immediate first-aid step that the question is actually testing.
What to do instead
Memorise the exposure sequence: wash the site immediately with soap and water (flush mucous membranes), then report, then seek evaluation; the first action is always decontamination.
Accepting a patient's statement of name and date of birth without comparing it to the requisition and armband, or identifying the patient by room number or bed.
Candidates treat verbal confirmation as sufficient and skip the two-identifier cross-check, especially under time pressure.
What to do instead
Require two independent identifiers actively compared against the requisition and the ID band; reject room, bed, diagnosis, or physical appearance as identifiers.
Choosing a site distal to or below an IV line, or selecting an arm on the side of a mastectomy, fistula, or lymphedema when a question asks for the best venipuncture site.
Candidates pick the most visible vein rather than applying the site-selection contraindications.
What to do instead
Screen sites against contraindications first (IV, fistula, mastectomy/lymphedema side, infection, scarring, hematoma), then choose the most distal suitable vein on the acceptable arm.
Selecting a butterfly needle with a large-volume tube set for a routine adult draw, or choosing a needle gauge/order-of-draw that mismatches the additive or test.
Candidates memorise equipment in isolation and do not link needle gauge, tube additive, and test requirement together.
What to do instead
Match equipment to the patient and test: standard adult draw uses a 21-23 gauge straight needle; small/fragile veins use a 23-gauge butterfly; verify tube additive order (blood cultures, coagulation, serum, heparin, EDTA, glycolytic) before answering.
Leaving the tourniquet on longer than a minute or allowing the patient to pump the fist during a draw, and then answering that this does not affect results.
Candidates underestimate how hemoconcentration and hemolysis change analyte values.
What to do instead
Apply the one-minute tourniquet limit and no-fist-pumping rule; if exceeded, release and rest before redrawing, and recognise that prolonged tourniquet time falsely elevates potassium, protein, and cell counts.
Filling an EDTA tube before a serum tube, or filling a coagulation tube only partially, when asked to sequence a multi-tube draw.
Candidates forget the order-of-draw mnemonic and the fill-volume requirement for citrate tubes.
What to do instead
Use the standard order (blood cultures, light-blue citrate, serum/SST, heparin, EDTA, glycolytic) and remember citrate tubes must be filled to the marked volume to preserve the correct blood-to-additive ratio.
Handling a specimen incorrectly after collection: exposing light-sensitive analytes to light, freezing a whole-blood EDTA sample, or delaying centrifugation/transport without regard to stability.
Candidates treat transport as an afterthought and do not connect analyte stability to handling conditions.
What to do instead
Match handling to the analyte: protect bilirubin and other light-sensitive tests from light, keep whole blood at room temperature unless specified, centrifuge and separate serum/plasma within the required window, and follow transport temperature and time limits.