A blood collector who used a light blue stopper tube after its expiration date may have the sample rejected because:

Question

Quizplus · Accepted Answer

The light blue stopper tube contains sodium citrate, which is an anticoagulant used to prevent the blood from clotting. If used after the expiration date, the effectiveness of the anticoagulant may decrease, leading to clotting of the blood sample. This would result in the sample being rejected. Additionally, if the tube is not completely filled, the ratio of anticoagulant to blood may be incorrect, leading to inaccurate test results.

A Blood Collector Who Used a Light Blue Stopper Tube