Red non-additive is an appropriate discard tube to collect prior to filling tubes for coagulation testing.
Blood thickens into a gel-like consistency during coagulation, which is the process by which it goes from being a liquid to become solid. Hemostasis is a bigger process that includes coagulation and is how the body controls when and how much bleeding occurs. The gel plugs seal blood artery leaks and stop blood loss. Coagulation factors, calcium, and phospholipids are necessary for the process. The liver produces coagulation factors (proteins).
The 3 stages of coagulation:
Samples of coagulation must be fully filled, but not overfilled. The minimum fill line is frosted and used to identify tubes. For accurate test results, the blood to anticoagulant ratio must be kept at 9 to 1.
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