What does the gray top tube primarily test for?

What does the gray top tube primarily test for?

• A. Lactic acid and cholesterol
• B. Glucose levels and lactic acid
• C. Sodium levels
• D. Electrolyte panels

Answer: (B)

The gray top tube is primarily designed for testing glucose levels and lactic acid. This tube typically contains sodium fluoride as an additive, which acts as a glucose inhibitor to prevent glycolysis after the blood sample is collected. By inhibiting glycolysis, the tube ensures that the glucose level measured accurately reflects the level in the bloodstream at the time the sample was taken. Additionally, the presence of potassium oxalate in some gray top tubes helps in anticoagulation and also aids in testing lactic acid by preventing its breakdown. In summary, the gray top tube is specifically used for specimens where accurate glucose measurements and lactic acid levels are critical, making it the appropriate choice for these tests.

The gray top tube is primarily designed for testing glucose levels and lactic acid. This tube typically contains sodium fluoride as an additive, which acts as a glucose inhibitor to prevent glycolysis after the blood sample is collected. By inhibiting glycolysis, the tube ensures that the glucose level measured accurately reflects the level in the bloodstream at the time the sample was taken. Additionally, the presence of potassium oxalate in some gray top tubes helps in anticoagulation and also aids in testing lactic acid by preventing its breakdown.

In summary, the gray top tube is specifically used for specimens where accurate glucose measurements and lactic acid levels are critical, making it the appropriate choice for these tests.