MRO Review & Interpretation 3

Question 1

A donor tests positive for PCP. The donor claims they were exposed to PCP through passive inhalation at a party. How should the MRO respond?

Accepted Answer

Report positive because passive inhalation is not a scientifically accepted explanation for a PCP positive

Answer

Passive inhalation is not a recognized scientific explanation for PCP positives at federally mandated cutoff levels.

Question 2

An employer receives a negative result for a pre-employment test. Three days later, the lab calls to report a clerical error and the result is actually positive. What should the MRO do?

Accepted Answer

Issue a corrected verified positive report to the DER

Answer

MROs must issue corrected reports when errors are discovered, and the corrected verified positive must be reported to the DER.

Question 3

Which laboratory result would cause an MRO to report a specimen as 'invalid' rather than 'adulterated'?

Accepted Answer

Presence of surfactant that interferes with testing

Answer

An invalid result is reported when the lab cannot obtain a valid test result due to an interfering substance or an unexplained inconsistency.

Question 4

When reviewing a positive cocaine metabolite result, the donor states they had dental anesthesia with cocaine. What is the MRO's correct response?

Accepted Answer

Verify the dental procedure documentation and report negative if confirmed

Answer

Cocaine is a Schedule II drug legitimately used as a topical anesthetic in some ENT procedures, and documented medical use is an acceptable explanation.

Question 5

Under DOT 49 CFR Part 40, how long does a donor have to request a split specimen retest after being notified of a positive, adulterated, or substituted result?

Accepted Answer

72 hours

Answer

Under 49 CFR Part 40, the donor has 72 hours from being notified to request that the split specimen be sent to a second HHS-certified laboratory.

(MRO) Medical Review Officer Certification Practice Test

(MRO) Medical Review Officer Certification Practice Test

MRO Review & Interpretation 3