CPT (Certified Phlebotomy Technician) Practice Exam

A red tube is used for STAT electrolytes. True or False?

1. True

2. False

3. Not enough information

4. Depends on the laboratory policy

The correct answer is: False

In the context of phlebotomy and laboratory testing, the red tube is primarily used for serum collection, and it does not contain any additives. While it can be used for various types of tests, STAT electrolytes are typically collected using a green or lavender tube, which contain specific anticoagulants or additives suitable for electrolyte testing. The use of a red tube for STAT electrolytes is not standard practice, as the collected serum may not yield accurate results for electrolytes without the proper anticoagulant. In laboratories, there are established protocols about which collection tubes to use for specific tests, and using a tube containing an appropriate additive is crucial for obtaining valid test results. Therefore, stating that a red tube is used for STAT electrolytes is false.