CSMLS Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

Which additive is in a gray stoppered blood tube?

EDTA

SPS

Sodium citrate

Sodium fluoride

The gray stoppered blood tube contains sodium fluoride as its additive. Sodium fluoride is primarily used for glucose preservation, which is critical in preventing glycolysis, the process where cells break down glucose and can lead to falsely low glucose levels in plasma or serum samples. This preservation is significant in laboratory settings, particularly when glucose testing is required after collection.

The presence of sodium fluoride makes this tube optimal for tests that require accurate glucose levels, ensuring that any potential changes in the sample's composition due to cell metabolism are minimized. This specific functionality distinguishes it from other additives found in blood collection tubes.

Get further explanation with Examzify DeepDiveBeta
Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy