00580
Effective date last observation normal values
1995-11-25
Definition: changes in the observation methods that would make values obtained from the old method not comparable with those obtained from the new method.
Null if there are no normals or units. If present, a change in this date compared to date-time recorded, the receiving system's test dictionary should trigger a manual review of the results to determine whether the new observation ID should be assigned a new ID in the local system to distinguish the new results from the old.
Length≤26
2 components
| 1 | O | - | time of an event | |
| 2 | O | - | degree of precision |