Rubber stopper for Blood Collection Tube are designed to fit tightly in the neck of blood collection tubes, creating an airtight seal. This is essential for preserving the sample, preventing contamination, and maintaining the stability of the blood until it can be analyzed. Stoppers are usually made from natural rubber or synthetic materials, which offer flexibility and durability.

Color Coding and Its Significance

One of the most distinctive features of rubber stoppers for blood collection tubes is their color coding. Each color corresponds to different additives or treatments within the tube, which can influence how the blood sample is processed. Understanding these color codes is vital for healthcare professionals and laboratory technicians. Here are some common colors and their meanings:

Red Stoppers: Typically indicate that the tube is a plain, non-additive container. This is often used for serum tests, allowing the blood to clot before centrifugation.

Lavender/Purple Stoppers: These stoppers usually denote EDTA (ethylene diamine tetraacetic acid) tubes, which are anticoagulants used for complete blood counts and blood smears. EDTA helps prevent clotting, making it ideal for hematological tests.

Green Stoppers: Indicate the presence of heparin, another type of anticoagulant. Heparin tubes are used for various tests, including chemistry panels, because they allow for plasma separation.

Blue Stoppers: Often signify that the tube contains sodium citrate, which is used primarily for coagulation tests. These tubes require specific blood-to-additive ratios for accurate results.

Yellow Stoppers: Generally indicate a tube with a separator gel and an additive, often used for blood culture or serum collection.