NHA Certified Phlebotomy Technician (CPT)Collection RoutineMedium
A phlebotomy technician is preparing to draw blood for a blood alcohol content (BAC) test as part of a legal proceeding. Which of the following antiseptics is most appropriate to use?
- APovidone-iodine
- BChlorhexidine gluconate
- CBenzalkonium chloride
- DIsopropyl alcohol
Show answer & explanationAnswer & explanation
Correct answer: A. Povidone-iodine
For blood alcohol content (BAC) tests, antiseptics containing alcohol, such as isopropyl alcohol, should be avoided as they can falsely elevate the patient's BAC. Povidone-iodine is a suitable alternative that does not contain alcohol.
Why the other options are wrong
- B. Chlorhexidine gluconate often contains alcohol, making it unsuitable for BAC tests.
- C. Benzalkonium chloride is an alcohol-free antiseptic, but povidone-iodine is a more commonly cited and widely accepted choice for BAC tests in many protocols.
- D. Isopropyl alcohol contains alcohol and can contaminate the specimen, leading to falsely elevated BAC results.
Antiseptic for BAC Testing
Specific antiseptic selection for blood alcohol content (BAC) tests to prevent contamination and inaccurate results.
- Alcohol-based antiseptics are contraindicated.
- Povidone-iodine is a common alternative.
- Ensures legal integrity of the specimen.
Memory trick: BAC test? No alcohol, only 'dine' for the vein.