HL7 V2 | TRIGGER EVENT U04
SSR^U04: specimen status request
specimen status request. It's sent as a SSR message (Specimen status request message) with the SSR_U04 message structure.
- Message type
SSR· Specimen status request message- Trigger event
U04- Message structure
SSR_U04· per HL7's current table 0354; older versions sometimes paired events differently- In MSH-9
SSR^U04^SSR_U04- Response
ACK· General acknowledgment message
Source: HL7 Terminology (THO) 7.4.0, published by HL7 International under CC0. Check your trading partner's specification for the values they actually send.