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Step 5 - Table Groups and Repetition

The Chameleon VMD file you set up in Step 1 - Setting Up the VMD generated a relatively simple HL7 message. In this example, let's suppose you also want your system to generate a more complicated Lab Result message of HL7 type ORU^R01. Specifically, you will want your generated messages to have the following segment grammar:

MSH PID {OBR {OBX}}

This HL7 grammar means that you want every ORU^R01 message to start with an MSH segment, be followed by a single PID segment and then have a repeating result group. The result group must occur at least once and start with a single OBR (order information) segment and be followed by 1-to-many OBX (result information) segments.

The following illustrates what this message might look like:

MSH|^~\&|MESA_RPT_MGR|EAST_RADIOLOGY|REPOSITORY|XYZ|||ORU^R01|MESA3b781ae8|P|2.3.1||||||||
PID|||CR3^^^ADT1||CRTHREE^PAUL|||||||||||||PatientAcct||||||||||||
OBR||||4550|||20010501141500.0000||||||||||||||||||F||||||||||||||||||
OBX|1|HD|SR Instance UID||1.113654.1.2001.30.2.1||||||F||||||
OBX|2|TX|SR Text||Radiology Report History Cough Findings PA evaluation of the chest demonstrates the lungs to be expanded and clear.  Conclusions Normal PA chest x-ray.||||||F||||||
OBR||||4551|||20010501141500||||||||||||||||||F||||||||||||||||||
OBX|1|HD|SR Instance UID||1.113654.1.2001.10.2.1.603||||||F||||||
OBX|2|HD|Study Instance UID|1|1.113654.1.2001.10||||||F||||||
OBX|3|HD|Series Instance UID|1|1.113654.1.2001.10.1||||||F||||||

This section of this tutorial will show you how to generate this type of message.