Final answer:
The blue tube, containing sodium citrate as an anticoagulant, is the one that goes to the Coagulation Department for tests. This is because it is specifically designed to prevent clotting prior to testing, allowing for accurate coagulation testing.
Step-by-step explanation:
The correct answer to the question 'Which color tube goes to the Coagulation Department to be tested?' is b. Blue.
When it comes to blood sample collection and testing, different color-coded tubes are used, each designed for different types of tests. The blue tube generally contains sodium citrate, an anticoagulant, which is crucial for coagulation tests. The presence of anticoagulant in these tubes helps to prevent the blood from clotting before the test is performed, which is essential for accurate measurement of clotting times and other coagulation factors.
Other tubes, such as those with red, green, or purple caps, contain different additives and are used for different types of tests. For example, red capped tubes are typically used for serum tests, green tubes contain heparin and are used for plasma determination, and purple tubes contain EDTA and are used for whole blood tests.