Medical Test Tubes with Color-Coded Samples - Lab Diagnostic Imaging #297208 (License: Personal Use)

This image shows four standard vacutainer-style test tubes with royal blue caps, each filled with a uniquely colored liquid-light purple, beige, pink, and pale yellow-representing common anticoagulant or additive types used in clinical blood collection. The consistent design suggests standardized phlebotomy protocols, where color coding ensures proper specimen handling and prevents cross-contamination. These visual cues align with CLSI guidelines for tube identification in healthcare settings.

Used on medical laboratory websites, educational health resources, or diagnostic service pages to illustrate sample collection procedures; matches user intent for understanding lab workflows, phlebotomy training, or interpreting test requisitions.