NHA Certified Phlebotomy Technician (CPT)Safety and ComplianceHard
A phlebotomy technician is tasked with performing a blood draw on a patient who states, 'I'm allergic to iodine.' The requisition specifies povidone-iodine for skin antisepsis. Which of the following is the most appropriate alternative antiseptic to use?
- AHydrogen peroxide
- B70% Isopropyl alcohol
- CChlorhexidine gluconate
- DBenzalkonium chloride
Show answer & explanationAnswer & explanation
Correct answer: C. Chlorhexidine gluconate
Chlorhexidine gluconate is a widely accepted and effective alternative antiseptic for venipuncture when a patient has an iodine allergy. Isopropyl alcohol is a primary disinfectant but may not be sufficient for all situations where iodine is specified, and hydrogen peroxide and benzalkonium chloride are less common primary choices for venipuncture antisepsis.
Why the other options are wrong
- A. Hydrogen peroxide is generally used for wound cleaning, not as a primary venipuncture antiseptic.
- B. While commonly used, isopropyl alcohol may not always be an adequate substitute when a stronger antiseptic like iodine is specifically requested, especially for blood cultures.
- D. Benzalkonium chloride is an antiseptic but less commonly used as a primary alternative to iodine for venipuncture than chlorhexidine.
Alternative Antiseptics for Venipuncture
Different antiseptic solutions used for skin preparation prior to venipuncture when the primary choice (e.g., povidone-iodine) is contraindicated due to allergy or other patient factors.
- Common alternatives include chlorhexidine gluconate and benzalkonium chloride.
- 70% Isopropyl alcohol is standard but may not be sufficient for all tests (e.g., blood cultures).
- Always verify patient allergies before skin preparation.
Memory trick: Chlorhexidine is the CLEAR choice for allergy!