Unit of Use (UOU) Series: The FDA UOU Explained – Part 1 By AHRMM In part one, we explore the reasons why the FDA created the (UOU) Unit of Use. Related Resources Pagination First page « First Previous page ‹ Previous … Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Current page 30 Data Standards Regulations and Regulatory Advocacy Suppliers Unique Device Identifier (UDI) Logistics