Question 57

Hold the needle by the wings of the butterfly.

When using a butterfly needle for venipuncture on dorsal hand veins, the phlebotomist should hold the needle by the wings of the butterfly to ensure better control and stability during the procedure.

A) Position the needle at a 45° angle to the skin.

Positioning the needle at a 45° angle is not appropriate for dorsal hand veins. Typically, a lower angle, around 10 to 15 degrees, is recommended to prevent penetrating through the vein and to enhance the chances of successful venipuncture.

B) Hold the needle by the wings of the butterfly.

Holding the needle by the wings is the correct technique as it provides better grip and control, allowing the phlebotomist to stabilize the needle and minimize movement, which is crucial for successful collection from smaller veins in the dorsal hand.

C) Instruct the patient to hold the collection tubes.

Instructing the patient to hold the collection tubes can be risky, as it may lead to movement during the procedure. It is preferable for the phlebotomist to handle the tubes to maintain control and ensure a sterile environment.

D) Apply the tourniquet at the antecubital area.

Applying the tourniquet at the antecubital area is not suitable for venipuncture on the dorsal hand veins. This action can restrict blood flow in the incorrect area and may decrease the visibility of the veins in the hand, complicating the procedure.

Conclusion

Option B is definitively correct as it emphasizes the importance of proper technique when using a butterfly needle, ensuring stability and control during venipuncture. The other options either suggest incorrect techniques or actions that could compromise the safety and effectiveness of the blood collection process.