From the Guidelines
An observed urine drug screen is required in cases of suspected adulteration to ensure the integrity of the testing process. This is based on the recommendation that direct observation is the most reliable method for specimen collection, as stated in the study published in Pediatrics in 2014 1. The study emphasizes the importance of obtaining a proper specimen to guarantee an accurate test result.
When suspected adulteration occurs, it is crucial to conduct a directly observed collection to prevent any further tampering attempts. This involves having the collector or an observer of the same gender watch the urine leave the donor's body and enter the collection container. The original unobserved specimen should be discarded, and the donor must remain at the collection site until the observed collection is completed.
Some key points to consider when collecting urine specimens include:
- Using a specially prepared restroom without running water, soap, or other chemicals
- Tinting the toilet water
- Documenting the specimen's appearance and color
- Taking the temperature of the specimen within 4 minutes of collection, which should range from 90°F to 100°F (32°–38°C)
- Explaining the procedure to the patient before collection, as stated in the study 1
It is essential to note that if unsupervised collection is used, results should be interpreted with caution, as emphasized in the study 1. By following these guidelines and conducting observed urine drug screens in cases of suspected adulteration, the validity and reliability of drug testing results can be maintained.
From the Research
Urine Drug Screen Requirements
- In cases of suspected adulteration, an observed urine drug screen is recommended to prevent tampering with the specimen 2, 3.
- Adulteration can be achieved through various means, including dilution, contamination with chemicals, and substitution of the urine specimen 3.
- To identify adulterated urines, laboratories monitor parameters such as pH, relative density, and urine color and turbidity 2.
- Some adulterants, like Visine, may not be detectable through these methods, emphasizing the importance of observed collection 2.
Adulteration Detection Methods
- The Adultacheck test strip can be used to detect dilute urine specimens and potential adulteration 4.
- However, the effectiveness of such methods may vary, and some adulterants, like Stealth, can evade detection 5.
- Laboratories employ various countermeasures to combat urine adulteration, including robust testing methods and protocols for handling suspicious specimens 6.
Collection and Testing Protocols
- Observed urine collection is a common and recommended practice to prevent sample tampering 3.
- Urine specimens should be assessed for pH, relative density, and appearance, and suspect specimens should be rejected 2.
- Alternative testing methods, such as oral fluid testing, may be considered in situations where observed urine collection is difficult or unreliable 3.