HL7 NDS Notification Detail
HL7 field reference NDS fields from HL7 v2.5.1 Show fields
These are the generated fields for the version selected at the top of the page. The document stays the same, but the reference panel follows that version.
Fields
NDS carries notification detail in equipment and application-status workflows.
The standard describes NDS this way: The equipment notification detail segment is the data necessary to maintain an adequate audit trail as well as notifications of events, (e.g., alarms that have occurred on a particular piece of equipment.
Equipment and specimen-control segments are used around instruments, analyzers, containers, device commands, device status, and test configuration. They are practical plumbing for lab and automation workflows.
The main trap is treating an equipment status as if it were a clinical result, or treating a specimen/container identifier as if it were interchangeable with a patient or order identifier. Keep the layers separate.
The v2.5.1 structures show NDS in EAN_U09 - Automated equipment notification. That tells you where it can appear, but the implementation guide still decides which optional fields are meaningful.
For practical interface work, read the generated field panel for datatype, required, repeatable, and table details, then use the notes below to decide what the field should mean in the receiving workflow.
NDS-1 identifies the Notification Reference Number for this equipment or specimen workflow. Send the identifier that the receiving system actually keys on, and keep the assigning authority or coding system visible when the datatype supports it.
NDS-2 is a timing field. Send the real source-system precision, do not pad unknown dates or times, and agree how timezone offsets are handled when time of day matters.
NDS-3 carries Notification Alert Severity for this equipment or specimen workflow. Populate it only when the receiver has a clear use for it, and keep the value in the datatype shape shown in the generated field panel.
The generated panel links this to HL7 table 0367; many real interfaces narrow that list further, so follow the receiver's implementation guide.
NDS-4 identifies the Notification Code for this equipment or specimen workflow. Send the identifier that the receiving system actually keys on, and keep the assigning authority or coding system visible when the datatype supports it.