NHA Phlebotomy Certification Practice Exam

The primary antiseptic for venipuncture is:

1. 70% isopropyl alcohol

2. 80% isopropyl alcohol

3. 90% isopropyl alcohol

4. Hydrogen peroxide

The correct answer is: 70% isopropyl alcohol

The primary antiseptic for venipuncture is 70% isopropyl alcohol. This concentration is effective because it maintains a balance between antimicrobial activity and the evaporation rate. At 70%, the alcohol has sufficient water content that slows down its evaporation, allowing for longer contact time with the skin. This contact time is critical in ensuring that the antiseptic can effectively kill bacteria and reduce the risk of infection at the site of the puncture. Higher concentrations of isopropyl alcohol, such as 80% or 90%, can evaporate too quickly, which may not allow for adequate disinfection of the skin before the procedure. Hydrogen peroxide, while a common antiseptic, is not usually recommended for skin preparation for venipuncture due to its potential to cause irritation and tissue damage, and it does not provide the same level of effectiveness as alcohol in this context. Using 70% isopropyl alcohol is a well-established standard in phlebotomy practices, ensuring the safety and hygiene of procedures.