Blue-Top Tube - Sodium Citrate (NaCitrate): This tube is primarily used for coagulation studies (PT and PTT). Complete filling of this tube is essential to obtain accurate results.

Lavender-Top Tube - EDTA: EDTA is the anticoagulant used for most hematology procedures. Its primary use is for the CBC and individual components of the CBC. The larger (6ml) tube is used for blood bank procedures.

Red-Top Tube - This tube has no anticoagulant and is used for many chemistry tests, drug levels, and blood bank procedures.

Navy Blue-Top Tube - There are two general types - one with K2 EDTA and one with no anti-coagulant. This tube is used primarily for trace metal analysis.

Serum Separator Tube (SST®) - This tube contains a clot activator and serum gel separator. It has no anticoagulant and is used for many chemistry tests. It cannot be used for certain drug levels or any blood bank procedures.

Green-Top Tube - Sodium Heparin or Lithium Heparin

Grey-Top Tube - Potassium Oxalate. This tube is used primarily for glucose tolerance testing.

Yellow-Top Tube - ACD (Sol. A or Sol. B)

Additional information on specimen collection and transport may be found in the Pathology Laboratories' Test Directory or in our downloadable Specimen Requirements PDF.