NHA Pretest 2025 Complete Practice Exam

When dealing with patients who have small veins, the butterfly method, also known as the winged infusion set, is particularly advantageous. This technique employs a small, flexible needle that is attached to plastic "wings," allowing for a more precise and controlled approach when accessing the vein. The design enables better maneuverability and is less likely to cause discomfort or damage to delicate veins compared to larger needles.

The butterfly method is especially useful for drawing blood from infants, children, or individuals with difficult venous access, as it can ensure that blood is drawn efficiently while minimizing trauma to the vein. This method gives the phlebotomist the ability to apply stabilization to the vein more easily, which can be crucial in preventing complications during the blood draw.

While the other methods listed each have their specific uses, they may not be as effective or comfortable for patients with small veins. The vacutainer method and vacuum draw method can sometimes be more challenging to use on small veins due to the size of the needle and the potential for collapsing the vein. The capillary method is generally reserved for situations where venous access is not possible, such as finger sticks for glucose monitoring, rather than for a standard venipuncture to collect larger volumes of blood.