The tube that will best prevent falsely increased potassium test results is:

Question

Quizplus · Accepted Answer

The tube that will best prevent falsely increased potassium test results is the light green tube. This is because it contains lithium heparin as an anticoagulant, which prevents clotting and does not interfere with potassium measurements. The green tube also contains heparin, but its concentration is higher and can cause elevated potassium levels. Red and gold tubes contain clot-activating substances, which can release potassium from red blood cells and lead to falsely elevated results.

The Tube That Will Best Prevent Falsely Increased Potassium Test