If a CBC was drawn in a blue-topped tube, what should you do next?

For a complete blood count (CBC), a lavender or purple-topped tube is typically used because it contains an anticoagulant that preserves the blood for analysis. A blue-topped tube is generally used for coagulation tests and contains sodium citrate, which can alter the results of a CBC by affecting the blood's clotting mechanism.

In this scenario, if a CBC was mistakenly drawn in a blue-topped tube, the most appropriate action is to redraw the specimen using the correct tube type. This ensures the accuracy and reliability of the test results, as performing a CBC on a sample from a blue-topped tube would not be valid or could lead to misleading conclusions regarding a patient's health.

The other mentioned actions would not address the issue appropriately; sending the incorrect tube to the lab would likely yield unsatisfactory results, while allowing it to sit would not correct the problem either. Using a red top tube is also not appropriate, as it is not designed for CBC purposes and might lead to hemolysis or abnormal values. Thus, obtaining a new specimen in the proper container is crucial for diagnostic accuracy.