When doctors or labs need to test blood, the first step is to collect it in the right kind of tube. You may have noticed that blood collection tubes come in different colors. Each color is not just for looks—it shows the type of chemical inside the tube. These chemicals help protect the blood so that accurate tests can be done. One of the most common and important tubes is the K3 EDTA tube, which usually has a lavender or purple cap.
A Complete Guide to K3 EDTA Tube
When doctors or labs need to test blood, the first step is to collect it in the right kind of tube. You may have noticed that blood collection tubes come in different colors. Each color is not just for looks—it shows the type of chemical inside the tube. These chemicals help protect the blood so that accurate tests can be done. One of the most common and important tubes is the K3 EDTA tube, which usually has a lavender or purple cap.
