A lot of the documents are not in the device master record, but are referenced in the dmr as to where the document is located (document control office, engineering library,. The model of the dmr table should have a formal index form as. It is a repository of all essential information about your company’s medical devices. In reading 820.181 and the fda guidance for device master record i cannot find any actual requirement for a controlled document called a dmr index. | medical device validation, regulation,.