What is the main use of a royal blue top tube with a light blue stripe?

The royal blue top tube with a light blue stripe is specifically designed for the collection of blood samples that are intended for lead poisoning analysis. This tube is used because it is manufactured to be free from any contaminants that might interfere with the testing of lead levels in the blood. The absence of trace elements ensures higher accuracy for analytical testing.

In the context of lead testing, it is critical to avoid any contamination from elements found in other types of tubes. Other colors of tubes may contain additives or coatings that could introduce lead or other substances into the sample, potentially skewing the results. Therefore, using a royal blue top tube with a light blue stripe provides a reliable option for obtaining accurate lead levels in patients, especially children, who are at higher risk for lead exposure.

The other options, while relevant to tests performed in phlebotomy, do not specifically correspond to the use of this particular tube. Alcohol testing requires different types of tubes to avoid contamination, hematology tests typically utilize lavender or pink top tubes, and urinalysis is conducted on urine samples rather than blood samples.