The different color blood tubes are used for different types of blood tests. Here are some common examples:
1. Red: The red blood tubes are used for collecting blood samples for serum tests. These tubes do not contain any anticoagulants, so the blood clots and the serum can be separated from the clot.
2. Lavender: The lavender blood tubes contain the anticoagulant EDTA, which is used to prevent the blood from clotting. These tubes are used for collecting blood samples for hematology tests, such as complete blood count (CBC).
3. Green: The green blood tubes contain the anticoagulant heparin, which is also used to prevent the blood from clotting. These tubes are used for collecting blood samples for plasma tests, such as electrolyte and glucose tests.
4. Gray: The gray blood tubes contain the anticoagulant sodium fluoride, which is used to preserve the glucose levels in the blood. These tubes are used for collecting blood samples for glucose tests, such as fasting blood sugar.
5. Yellow: The yellow blood tubes contain the anticoagulant ACD, which is used to preserve the blood cells for certain tests, such as DNA testing.
It's important to use the correct color tube for each test to ensure accurate results.