Blood tests may be conducted in addition to or independently of urine testing. A distinction is made between venous blood collection for laboratory analysis, venous blood collection for the biological passport, and capillary blood collection for the Dried Blood Spot, DBS method.
The procedure for the three types of blood collection is essentially the same, although they differ in three fundamental ways: The body site from which the blood is drawn, the amount of blood required, and the testing kit used. Certain steps of the testing procedures differ slightly as a result. If the sample is intended for use in blood profiles, it may not be collected until two hours at the earliest following physical exertion.