Question 10

An EDTA tube should be inverted 8 to 10 times after blood collection.

Inverting an EDTA tube 8 to 10 times ensures proper mixing of the anticoagulant with the blood, preventing clot formation.

A) 5 to 7

This option is incorrect because while inverting a tube 5 to 7 times may seem sufficient, it does not meet the recommended guideline of 8 to 10 inversions necessary to fully mix the blood with the EDTA.

B) 2 to 4

This option is also incorrect as inverting the tube only 2 to 4 times is far below the required amount. Insufficient mixing can lead to inaccurate laboratory results due to potential clotting.

C) 1 to 3

Inverting a tube just 1 to 3 times is inadequate for proper anticoagulation. This minimal number of inversions would likely result in poor mixing and an increased risk of clot formation in the sample.

D) 8 to 10

This is the correct option, as it aligns with standard laboratory protocols for handling EDTA tubes. Proper inversions of 8 to 10 times ensure that the anticoagulant is thoroughly mixed with the blood, which is crucial for accurate test results.

Conclusion

The requirement to invert an EDTA tube 8 to 10 times is essential for preventing clotting and ensuring accurate lab results. All other options fall short of this standard, leading to potential errors in sample processing and analysis.