OML^O21
OML - Laboratory order
Order
The following message structure may be used for the communication of laboratory and other order messages and must be used for lab automation messages. While the ORM message with the OBR segment can be used for backwards compatibility for general lab messages, only the OML message should be used to take advantage of the specimen and container extensions required in laboratory automation.
Note: The additional patient information (the segments PID, PD1, PV1, PV2, etc, which are sent after the OBR with the current order - indicated below with words "previous result"), could have been transferred with the previous result, because the patient demographics related to the previous result can differ from the demographics related to the current order. The current intent is to only allow references to the same patient as in the header PID.
Message Types
Message Type
Trigger Structure
Event Flow
TriggerO21
SendOML_O21
ReceiveNUL