Logic for parsing HL7 Message

This guide explains how Rooster reads and interprets HL7 lab messages to determine criticality, route results, and trigger alerts.

Rooster may receive HL7 messages with different segments than those extracted from your interface system. For example, while the ordering doctor may be in PRT 2 in your HL7, our system retrieves it from ORC12.1 instead.

Accession No	LIS & others - OBR 3.1 Beaker - ORC 4.1
orderedByMCR / ordering doctor	LIS & others - OBR 16.1 Beaker & RIS - ORC 12.1
orderedLocation	ORC 13
hospitalService AKA specialtyCode	Everything else: PV1 10 RAD (rispacs): PV1 52
patientUIN	PID 3.1 NOTE: ADT uses PID 2.1 because it’s ngemr, lab is sap
patientBirthdate	PID 7
MSH Timestamp	MSH 7
message control ID	MSH 10
procedureCode	OBR 4.1
specimen source	SPM 8.2 if exists, else OBR 15
specimen type	SPM 4.2
specimen collection time	SPM 17
testResultCode (lab)	OBX 3.1
testResultValue (lab / ecg) will either be string or number depending on filter for testResultCode	OBX 5 NOTE: if OBX 2 is “SN”, it’s a structured number eg. a ratio, safe to remove all the ^ delmiters and read as a string
testResultValue (rad / pathology)	OBX 8
r1Flag (rad)	ZPF 3
admitDatetime	PV1.44