- During a workplace drug screening collection, the donor provides a urine specimen that measures 32°C (89.6°F) within 4 minutes of collection. The specific gravity is 1.002 and the creatinine level is 18 mg/dL. What is the appropriate next step?
Answer: Reject the specimen as dilute and require immediate recollection under direct observation protocols
This specimen shows multiple indicators of dilution: low specific gravity (normal 1.003-1.030), low creatinine (<20 mg/dL is considered dilute), and borderline low temperature. DOT regulations require rejection of dilute specimens and immediate recollection under direct observation. Option A is incorrect because multiple parameters indicate dilution despite initial temperature compliance. Option C is wrong as dilute specimens must be rejected, not just documented. Option D is incorrect as drug screening protocols specify recollection procedures, not alternative specimen types.
- A blood alcohol specimen collected for legal purposes shows signs of hemolysis after transport to the laboratory. The collection was performed 3 hours ago using proper technique with sodium fluoride tubes, and chain of custody was maintained. The laboratory requests recollection. What factor most likely contributed to this specimen quality issue?
Answer: Transport temperature fluctuations caused thermal shock to red blood cells despite proper anticoagulant preservation
Hemolysis in properly collected specimens is most commonly caused by temperature extremes during transport. Blood cells are sensitive to thermal shock from freezing or excessive heat. Sodium fluoride preserves specimens for alcohol testing but doesn't prevent temperature-related cell damage. Option A is incorrect as 3 hours is well within preservation limits. Option B is wrong as inadequate mixing causes clotting, not hemolysis. Option D is unlikely with standard evacuated tube systems when proper technique is used.
- Considering the behavioral indicators and timing, what collection modifications should be implemented?
Answer: Deny restroom access, proceed immediately with direct observation collection, and document behavioral observations in chain of custody
The combination of late arrival, nervous behavior, and restroom request suggests potential tampering intent. Direct observation collection is warranted, and restroom access should be denied to prevent specimen manipulation or elimination of substances. Behavioral indicators should be documented. Option A allows potential tampering opportunity. Option C provides supervised rather than direct observation. Option D delays collection unnecessarily when behavioral indicators suggest tampering risk.
- During blood alcohol specimen collection, the gray-top tube fills only halfway despite good blood flow and proper needle placement. The patient reports taking aspirin daily and had dental work performed yesterday. What is the most likely cause and appropriate response?
Answer: The tube vacuum has been compromised; replace with a new gray-top tube and continue collection from the same needle placement
Gray-top tubes contain sodium fluoride and potassium oxalate as anticoagulant/preservative. Partial filling despite good flow typically indicates vacuum loss. A new tube should be used while maintaining the same venipuncture site. Option B is incorrect as aspirin doesn't interact with sodium fluoride to cause clotting. Option C is inappropriate as massage can cause hemolysis, and dental anesthesia doesn't affect systemic blood pressure significantly. Option D compromises the anticoagulant-to-blood ratio needed for accurate testing.
- What is the correct protocol for this insufficient volume situation?
Answer: Retain the specimen, provide fluids to the donor, and combine it with a second specimen collected within 3 hours
DOT regulations require a minimum of 45 mL for drug testing. When insufficient volume is provided but the specimen meets other validity criteria, the collector must retain the specimen, offer reasonable amounts of fluid to the donor (up to 40 oz over 3 hours), and attempt to collect additional specimen to combine with the first. Option A is wrong due to insufficient volume. Option B wastes a valid partial specimen. Option D is incorrect as insufficient volume due to medical reasons is not considered a refusal.
- Which sequence of actions best ensures specimen integrity and chain of custody compliance for this high-risk collection?
Answer: Collect urine with direct observation, verify temperature and volume immediately, then collect blood while maintaining chain of custody documentation
For high-risk collections with tampering history, direct observation of urine collection is required, followed by immediate temperature and volume verification (temperature must be 90-100°F within 4 minutes). Blood collection follows while maintaining proper chain of custody. Option A is incorrect as continuous visual contact during blood collection is not standard. Option B is wrong because supervision without direct observation is insufficient for high-risk cases. Option C is impractical and not part of standard protocols.
- What is the most critical consideration when preparing the venipuncture site for the blood alcohol specimen in this scenario?
Answer: Use betadine instead of alcohol-based antiseptic and allow complete air drying before venipuncture to prevent test interference
For blood alcohol testing, alcohol-based antiseptics must be avoided as they can contaminate the specimen and falsely elevate BAC results. Betadine (povidone-iodine) or other non-alcohol antiseptics should be used instead, with complete air drying before venipuncture. Option B is incorrect as excessive tourniquet pressure could worsen bruising and is not appropriate. Option C is wrong because alcohol-based prep cannot be used regardless of drying time. Option D addresses documentation but not the critical site preparation requirement.
- How should the dual testing requirements be managed to ensure regulatory compliance for both test types?
Answer: Perform DOT collection first using separate chain of custody, then employer testing with different paperwork and split specimen protocols
DOT and non-DOT testing have different regulatory requirements, chain of custody procedures, and specimen handling protocols. Each must be performed as separate collections with their own documentation. DOT testing takes priority for safety-sensitive positions. Option B is incorrect as combining violates specific regulatory requirements for each test type. Option C inappropriately delays DOT testing. Option D violates chain of custody requirements as each test type needs independent specimen collection.
- A patient scheduled for blood alcohol testing arrives with hand sanitizer residue visible on their hands and forearms. They report using alcohol-based sanitizer "several times" in the waiting room. How should the phlebotomist proceed?
Answer: Delay collection for 15-30 minutes, have patient wash thoroughly, then proceed with non-alcohol antiseptic preparation
Alcohol-based sanitizer on skin can potentially contaminate blood alcohol specimens through absorption or residue at the puncture site. Best practice requires waiting 15-30 minutes after thorough washing to allow any absorbed alcohol to dissipate, then using non-alcohol antiseptic for site preparation. Option A doesn't address potential absorption timing. Option B doesn't eliminate contamination risk. Option D ignores the need for alcohol clearance time.
- A forensic blood alcohol specimen requires collection 6 hours post-incident. The patient has an IV line in the right antecubital fossa infusing normal saline. The left arm shows signs of recent venipuncture from earlier blood draws. What is the most appropriate collection approach?
Answer: Use the left antecubital area distal to previous puncture sites after confirming adequate time has passed since last draw
For forensic specimens, collection from IV lines is contraindicated due to dilution risk. The left arm can be used if adequate time has passed since previous draws and hemostasis is complete. Collection should be from undisturbed areas. Option A is incorrect as IV line collection compromises specimen integrity. Option C may be unnecessarily difficult when better sites are available. Option D risks IV fluid contamination even below the infusion site.
