A device master record is a collection of every document needed to manufacture, package, and possibly service a medical device. 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,. Device master record index for amylase. | medical device validation, regulation,. The food and drug administration (fda) requires manufacturers of medical devices to create and maintain a device master record (dmr).