NHA Certified Phlebotomy Technician (CPT)Collection RoutineMedium
A phlebotomy technician is preparing a site for venipuncture. After applying antiseptic, the technician should allow it to air dry completely. What is the primary reason for this step?
- ATo prevent the formation of a hematoma at the site.
- BTo prevent the patient from feeling a stinging sensation.
- CTo allow the antiseptic to fully kill microorganisms.
- DTo avoid diluting the blood specimen with antiseptic.
Show answer & explanationAnswer & explanation
Correct answer: C. To allow the antiseptic to fully kill microorganisms.
Antiseptics, such as alcohol or povidone-iodine, require a specific contact time to effectively destroy or inhibit the growth of microorganisms on the skin. Allowing them to air dry ensures this contact time is met, maximizing their germicidal action and preventing contamination.
Why the other options are wrong
- A. Hematoma formation is related to venipuncture technique, not antiseptic drying time.
- B. While air drying can reduce stinging, the primary reason is microbial action.
- D. Though possible, diluting the specimen is less of a concern than introducing microorganisms.
Antiseptic Drying Time
The required duration for a chemical antiseptic to air dry on the skin surface before venipuncture, allowing it to achieve maximal antimicrobial efficacy.
- Essential for effective microbial killing.
- Prevents contamination of the blood specimen.
- Different antiseptics have varying drying times.
- Waving or blowing on the site is not recommended as it reintroduces contaminants.
Memory trick: CLEAN Site: Cleanse, Let Dry, Eliminate Contaminants, Avoid Re-touch.