Clinical data platform for a hospital network
A unified clinical data platform consolidating EMR, lab and operations data across six sites — with strict role-based access and a clean audit posture.
Tools / product used · Custom platform on Vestval architecture
Challenge
Six sites ran two EMR variants, three lab systems and site-level operations spreadsheets. Network-level reporting was a monthly forensic…
Solution
A network-wide clinical data platform with HL7/FHIR integrations, role-based access with PHI redaction at the query layer, researcher and…
Architecture
We modelled the canonical clinical entities first, integrated read-only from source systems, layered a governed access plane with PHI…
Timeline
4-phase implementation · Custom platform on Vestval architecture
Impact
Network-wide clinical reporting available for the first time
Challenge
Six sites ran two EMR variants, three lab systems and site-level operations spreadsheets. Network-level reporting was a monthly forensic exercise and clinical research requests took weeks to fulfil.
Objectives
- Single, governed clinical data view across six sites
- Cut research data-request turnaround from weeks to days
- Establish a defensible PHI access posture, audit-ready by default
- Hand off a system the network's IT can operate without us
Approach
We modelled the canonical clinical entities first, integrated read-only from source systems, layered a governed access plane with PHI redaction, and embedded analysts for the first quarter of go-live.
Solution
A network-wide clinical data platform with HL7/FHIR integrations, role-based access with PHI redaction at the query layer, researcher and operations workspaces, and an immutable access log.
Implementation approach
- 1
Canonical model before ingestion
Clinical entities (patient, encounter, order, result) modelled and signed off by clinical leads across sites before any integration work began.
- 2
Read-only at source
EMR and lab systems integrated read-only via HL7/FHIR. Source systems were never the integration risk.
- 3
PHI access plane
Access controls and PHI redaction enforced at the query layer with a per-query audit log, not at the BI tool.
- 4
Embedded analyst hand-off
Vestval analysts embedded with the network's analytics team for one quarter post-go-live with an explicit hand-off plan.
Technologies used
- HL7 / FHIR integrations
- Clinical canonical model
- PHI redaction layer
- Researcher workspace
- Immutable access log
Outcomes
- Network-wide clinical reporting available for the first time
- Research data-request turnaround moved from weeks to days (qualitative)
- Audit-ready PHI access posture across six sites
- Internal team owns the platform within one quarter of go-live
Lessons learned
- Model clinical entities canonically before touching any source system.
- Enforce PHI redaction at the query layer, never at the dashboard.
- Embed for hand-off from day one — clinical IT cannot inherit a black box.
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