In an outpatient lab, a fasting adult needs a morning metabolic panel and a coagulation tube drawn, and the tray holds mixed tubes with varied dates and one cracked tube. The requisition notes fasting status and test priorities for collection. Which equipment, tube, expiration, and testing-requirement verification should the PCT/A complete before venipuncture?

The correct response is right because fasting status directly affects metabolic panel accuracy so the PCT must confirm compliance, must inspect the tray and discard any expired or cracked tubes to preserve vacuum, sterility, volume and additive integrity, and must select tube types matched to the ordered metabolic and coagulation tests while honoring requisition-noted priorities and collection sequence. The distractor describing drawing the metabolic tube before the coagulation tube fails by order-of-draw concept because citrate coagulation tubes must precede serum chemistry tubes to prevent additive carryover and tissue thromboplastin effects that alter clotting results. The distractor describing using correct-appearing tubes without confirming test priorities fails by requisition-verification concept because the requisition controls identity, test order and special handling and skipping recheck risks wrong sequence or missed requirements. The distractor describing collecting both tests in chemistry tubes fails by additive-specificity concept because coagulation testing requires sodium citrate at a precise blood ratio while metabolic testing requires different tubes, so substitution invalidates results. Exam caveat is that efficient routine shortcuts often look correct under time pressure but any omitted verification violates standards and creates recollection. Practical check is to ask about last intake, inspect dates and integrity, and match tube types and planned draw order to the requisition before venipuncture.