National Center for Competency Testing Flashcards

Which tube is drawn first when only a coagulation test (PT/INR) is ordered via butterfly needle?

Answer: A discard tube followed by the light blue top tube

When using a butterfly needle for coagulation studies, a discard tube is drawn first to eliminate air in the tubing that would underfill the citrate tube.

Which of the following is a primary cause of hemolysis in a blood specimen?

Answer: Collecting the specimen too slowly with a small-bore needle and forceful aspiration

Forceful aspiration through a small needle creates shear stress that ruptures red blood cells, causing hemolysis.

What is the maximum number of venipuncture attempts a phlebotomist should make on a single patient before seeking assistance?

Answer: 2

Standard practice limits phlebotomists to two venipuncture attempts per patient before asking a colleague to attempt the collection.

A specimen label must be applied at which point during the collection process?

Answer: Immediately after collection, at the patient's bedside

Labeling must occur immediately at the bedside after collection to prevent specimen mix-ups and ensure chain of custody.

Which vein is considered the preferred site for venipuncture in adults?

Answer: Median cubital vein

The median cubital vein is the preferred site because it is large, well-anchored, and less likely to roll during venipuncture.

Which of the following patient conditions requires special identification verification procedures per NCCT standards?

Answer: Unconscious or sedated patients

Unconscious or sedated patients cannot verbally confirm their identity, requiring staff or armband verification to ensure correct specimen labeling.

Which personal protective equipment (PPE) is minimally required for every venipuncture procedure?

Answer: Gloves only

Gloves are the minimum required PPE for all venipuncture procedures according to standard precautions.