What is the main purpose of using different colored tubes in blood collection?

The primary reason for using different colored tubes in blood collection is to distinguish between test types. Each color signifies the presence of specific additives or the absence of additives that are necessary for different laboratory tests. This system helps ensure that the correct tube is used for the intended test, which is crucial for accurate test results. For instance, a tube with a red cap may contain no additives and is typically used for serum tests, while a lavender tube may contain EDTA, an anticoagulant used for complete blood counts.

Using the appropriate colored tube as per the test requirement also helps laboratory personnel quickly identify and organize samples, further enhancing the efficiency and accuracy of laboratory work.