Responsibilities of a U.S. agent The U.S. agent must either reside in the U.S. or maintain a place of business in the U.S. The U.S. agent cannot use a post office box as an address. The U.S. agent cannot use an answering service. They must be available to answer the phone or have an employee available to answer the phone during normal business hours. The responsibilities of the U.S. agent are limited and include: assisting FDA in communications with the foreign establishment, responding to concerning the foreign establishment's devices that are imported or offered for import into the United States, assisting FDA in scheduling inspections of the foreign establishment and if FDA is unable to contact the foreign establishment directly or expeditiously, FDA may provide information or documents to the U.S. agent, and such an action shall be considered to be e to providing the same information or documents to the foreign establishment. Please note that the U.S. agent has no responsibility related to reporting of adverse events under the Medical Device Reporting regulation (21 CFR Part 803), or submitting 510(k) Premarket Notifications (21 CFR Part 807, Subpart E).
审厂的触发原因包括： 一，例行检查； 二、FDA需要调查行业数据； 三，发生顾客抱怨，特别是多次的抱怨 四、发生较多的不良事件； 五，产品多次出现质量问题； 六、FDA接受其他管理局的委托进行审厂。比如，接受退伍军人管理局的委托。也可以主动申请审厂。有时候，你的美国客户，也可以申请FDA来审厂。审查不通过，只要后续措施得力，通常导致罚款之类的处罚。对审查的结果，应严格按照审核官的要求，提供详细的整改资料，立即停止销售。当然，有的整改措施是需要效果验证的。你就需要同时提交效果验证的证据。审厂不通过，直接导致罚款。
美国市场要求：FDA注册认证 器械法规—FDA注册 • I类(CLASS I)产品，绝大部分只需进行登记(LISTING)和实施GMP规范，产品即可进入美国市场。其中不少产品连GMP也豁免， 个别产品则需向FDA递交“上市前通知” ，即510（K）。 • II 类(CLASS II)产品，在进行设施登记和器械注册后，还需实施GMP和递交“上市前通知” 即510(K) 申请。个别产品510（K）豁免。
提供FDA注册，食品FDA注册、化妆品FDA注册，美国代理人服务、FDA验厂、FDA警告性移除