CPC CPC Adulteration & Specimen Validity Testing 2

Question 1

What specific gravity range indicates a substituted specimen under federal drug testing guidelines?

Accepted Answer

Less than 1.001 or greater than 1.020

Answer

Specific gravity outside 1.001–1.020, combined with creatinine below 2 mg/dL, meets the federal criteria for a substituted specimen.

Question 2

A donor's specimen is reported as 'dilute.' What does this finding indicate?

Accepted Answer

The specimen has creatinine between 2–20 mg/dL and specific gravity between 1.001–1.003

Answer

A dilute specimen has low but not absent creatinine (2–20 mg/dL) and specific gravity (1.001–1.003), suggesting either natural over-hydration or intentional dilution.

Question 3

Under DOT regulations, what action is typically required when a pre-employment test result is reported as dilute negative?

Accepted Answer

The employer may, but is not required to, conduct a recollection under direct observation

Answer

For a dilute negative pre-employment result, the employer has the discretion to require a recollection under direct observation per their written policy, but it is not mandated.

Question 4

What laboratory finding would classify a specimen as 'invalid' under federal validity criteria?

Accepted Answer

Presence of an unidentified interfering substance or results that are outside expected physiological ranges

Answer

An invalid result occurs when the laboratory cannot complete testing due to an interfering substance or results that are inconsistent with normal human physiology.

Question 5

When a specimen is reported as 'invalid,' what is the MRO's required next step?

Accepted Answer

Contact the donor to determine if there is a legitimate medical explanation, then order a recollection if no explanation is provided

Answer

The MRO must attempt to contact the donor for a medical explanation; if none is found, the MRO orders a recollection under direct observation.

(CPC) Certified Professional Collector Practice Test

(CPC) Certified Professional Collector Practice Test

CPC CPC Adulteration & Specimen Validity Testing 2