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Sample Messages: HL7 minimal lower layer protocol
HL7 minimal lower layer protocol
HL7 Outbound messages are framed using the HL7 Minimal Lower Layer 
Protocol. This protocol is documented in the HL7 2.6 specification. All HL7 
messages begin with one start block character. The framing is completed by an 
end character and a carriage return character at the end of the message. The 
general format is as follows:
<SB> <HL7 message> <EB> <CR>
Where:
<SB> = Start Block character (0x0B)
<EB> = End Block character (0x1C)
<CR> = Carriage Return Character (0x0D)
<HL7 messages> use UTF-8 character encoding.
Interface data content
For HL7 Outbound messages, the trended data of monitor is mapped to data 
field positions in the HL7 segment structures to create result messages.
The following pages provide the general format of the various HL7 data 
messages recognized by the monitor for outbound interface. This document 
describes only the data fields and segments that are provided by monitor. Fields 
and segments not listed here are not sent by monitor.
Transactions from the monitor HL7 interface
Result reporting messages (ORU)
Overview
The HL7 results message type supported by the monitor HL7 outbound interface 
for result reporting is described below.
 Result Message (ORU) — This message indicates that data has been 
acquired.
Result Message Composition
All ORU messages have the same basic composition using the following HL7 
segment types:
 MSH — Message header segment
 PID — Patient identification segment
 PV1 — Patient visit segment