2.2
Message Control Segments
The segments used to control
the messages that are sent through the ADT
system are the MSH and the MSA.
The MSH segment defines the intent,
source, destination, and some specifics of
the syntax of a message. If nothing causes
the message to be canceled, the control segment
MSA acknowledges receipt of the incoming
message. When the receipt of the message is
completed, the responding system sends an
acknowledgment to the initiating system. This
acknowledgment means that the message was
placed in some type of secure environment
and the receiving system commits to processing
it in a reasonable amount of time.
3.0
ADT (Admission. Discharge, and Transfer) Transactions
All systems that are attached
to the network require information about patients.
Therefore, the ADT
transaction set is one of the most commonly
used, because it provides for the transmission
of new or updated demographic and visit information.
Most often, the information
is entered into an ADT system, passed
to the nursing, ancillary and financial systems
in the form of an unsolicited update to a
record-oriented query.
The LINKTools® TCP/IP
HL7 Receiver automatically generates an ACK
or NAK for HL7 message validation
