General Flashcards
7 cards from real Certified Phlebotomy Technician Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General flashcards as text
A gray-top tube contains sodium fluoride. Its PRIMARY purpose is to:
Answer: Preserve glucose by inhibiting glycolysis
Sodium fluoride inhibits the enzyme enolase, halting glycolysis and stabilizing glucose levels in the specimen.
Which standard precaution applies to ALL patients regardless of known infection status?
Answer: Treating all blood and body fluids as potentially infectious
Standard precautions require treating every patient's blood and body fluids as infectious to protect both patient and healthcare worker.
A 2:1 blood-to-additive ratio error in a sodium citrate tube most commonly causes:
Answer: Falsely prolonged PT/aPTT results
Underfilling a citrate tube leaves excess anticoagulant, which falsely prolongs clotting times by over-chelating calcium.
The antecubital fossa is located:
Answer: In the inner bend of the elbow
The antecubital fossa is the triangular depression at the front of the elbow, where the major veins used for venipuncture are found.
Which organization publishes the H3 and H4 guidelines used for phlebotomy procedures?
Answer: CLSI
The Clinical and Laboratory Standards Institute (CLSI) publishes procedure standards including H3 for venipuncture and H4 for skin puncture.
When performing a heel stick on a newborn, the puncture should be made on the:
Answer: Medial or lateral plantar surface of the heel
CLSI guidelines specify the medial or lateral plantar surface of the heel to avoid the calcaneus bone and posterior curved area.
A patient has a mastectomy on her left side. Where should the phlebotomist draw blood?
Answer: Right arm or non-affected extremity
Drawing from the same side as a mastectomy risks lymphedema and unreliable results due to compromised lymphatic drainage.