Definition: ASTM in today’s laboratories
ASTM integration usually describes serial or TCP-based communication where the analyzer and LIS exchange structured records for orders, results, QC, and sometimes query/ack sequences. Unlike enterprise HL7 routes, ASTM conversations are often tightly coupled to a single device channel.
Workflow: bidirectional testing
In bidirectional mode, the LIS pushes worklists to the analyzer and receives completed runs with flags, dilutions, and repeat patterns. Pre-analytical rules in the LIS decide what is eligible to download, while post-analytical rules determine whether results auto-verify or require technologist review.
Implementation: mapping and clocks
Mapping covers not only test codes but units, reference ranges, abnormal flags, and reflex logic. Clock synchronization matters: mismatched timestamps complicate QC review and correlate with message rejection. Channel logs should correlate LIS events with raw frames for troubleshooting.
Interoperability alongside HL7
Hospital-facing HL7 feeds rarely replace ASTM for every instrument. A mature architecture uses HL7 for ADT/order/result enterprise hops and ASTM (or vendor SDKs) where the device requires it. Medrara treats both as first-class integration surfaces when enabled for your deployment.
Operational governance
Laboratory operations should own periodic re-validation after firmware upgrades, reagent lot changes that affect ranges, and instrument service events. IT owns network segmentation, certificate rotation where applicable, and firewall policy.
Comparison table
ASTM vs HL7 at a glance
| Aspect | ASTM device channel | HL7 hospital feed |
|---|---|---|
| Scope | Single analyzer conversation | Enterprise patient/order/result |
| Typical transport | Serial/TCP point-to-point | MLLP/VPN to engine or HIS |
Frequently asked questions
Is ASTM obsolete?
No. While many vendors offer TCP/IP alternatives, ASTM-style framing persists in installed devices. Your integration strategy should reflect the instruments you own, not generic market claims.
Can ASTM and HL7 run on the same LIS tenant?
Yes. They address different endpoints; the LIS should unify results into a single validation pathway regardless of transport.