C70495Level 5
Anti-Thrombin Unit
**Semantic type:** Quantitative Concept
**Definition:** A unit of anti-coagulation potency of antithrombin determined as the amount of antithrombin that neutralizes one unit of World Health Organization preparation 89/588 of thrombin.
**Synonyms:** - ATU - ATU - Anti-thrombin Unit(s) - Antithrombin III Unit
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