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AttatvaSystems
Selected work

A clinical knowledge assistant that never leaves the VPC

Client identity withheld under NDA
Client
Hospital network, 11 sites
Sector
Healthcare · Singapore
Delivered
2025
Stack
Sutra · self-hosted inference · pgvector · on-prem Kubernetes
Clinician research time
-71%
Patient data leaving the network
0 PHI
All work

The problem

Eleven sites, each with its own accumulated clinical guidance, some of it contradicting the others. Clinicians were spending measurable time hunting for the current version of a protocol. Any solution that sent a single patient identifier to a third-party API was categorically out.

What we did

Sutra deployed inside the network's own VPC with self-hosted inference. Hybrid retrieval over the guidance corpus, with every answer citing the source document, the site it applies to and the revision date. Where two sites disagree, the assistant says so and shows both rather than silently picking one. An evaluation set written with the clinical governance team ran in CI from the first week.

What changed

Clinician research time down 71% against a pre-deployment baseline the governance team defined themselves. No patient data left the network at any point — there was no egress path to leave by. The contradiction-surfacing behaviour turned out to be the feature clinical governance valued most, which nobody predicted during scoping.

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Selected work

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attatvasystems@gmail.com · Replies within 1 business day, Kathmandu time (UTC+05:45)