American Medical Certification Association (AMCA) Phlebotomy Practice Exam

What type of needle is recommended for patients with small, thin, or fragile veins?

1. Standard needle

2. Butterfly needle with syringe

3. Lancet

4. Vacutainer

The correct answer is: Butterfly needle with syringe

The recommended choice for patients with small, thin, or fragile veins is a butterfly needle with a syringe. Butterfly needles, also known as winged infusion sets, have two "wings" that provide better stability and control during venipuncture. Their design allows for a more precise angle of insertion, which is crucial for accessing delicate veins without causing trauma. Using a syringe in conjunction with a butterfly needle provides greater flexibility; it allows for gentle suction while drawing blood, minimizing the risk of collapsing fragile veins. This combination is particularly beneficial in patients with conditions such as those undergoing chemotherapy or in pediatric populations, where smaller veins are often the norm. Other needle types, like standard needles, vacutainers, or lancets, may not provide the same level of control or gentleness required for patients with these vein characteristics, leading to difficulties in successfully obtaining a sample without causing discomfort or complications.