Final answer:
The order of draw for a brown tube varies based on the specific tests and additives, and while it's not commonly first or second, its exact position depends on institutional protocols. Brown tubes are used for trace element, lead testing, or toxicology and can be drawn before or after serum tubes or near the end of the draw.
Step-by-step explanation:
The question pertains to the order of draw in phlebotomy, specifically when to collect the brown tube. The order of draw is a guideline for collecting blood samples in a specific sequence to avoid cross-contamination and preserve test integrity. Brown tubes, which are typically used for trace element testing, lead testing, or toxicology, have a specific place in this order. However, without specifying the tests being performed, it's not always clear where the brown tube belongs since it can vary based on the additives or tests required.
Without additional context, we can't provide the exact position of a brown tube in the order of draw. Still, it's not commonly the first or second tube drawn. Depending on the guidelines followed and the additives in the tubes, the brown tube could be drawn after the coagulation tube (light blue) and before or after the serum tubes (red, gold, or tiger top), or it may be drawn closer to the end if it is used for tests that require minimal contamination by other additives. It's essential for healthcare workers to follow their institution's specific protocol for the order of draw.