What type of vials or tubes should blood samples be placed in for analysis?

Blood samples should be placed in color-coded vials because these vials are specifically designed for different types of analyses and anticoagulants. Each color indicates the presence of different additives that are crucial for specific testing purposes, such as preventing clotting or preserving cellular components. This standardization helps ensure accurate results and facilitates proper handling and processing in the laboratory.

Using the appropriate color-coded vials also reduces the risk of contamination and ensures that the samples are preserved under optimal conditions for the intended tests. Thus, the use of these specialized vials is essential for maintaining the integrity of the blood samples throughout the analysis process.