NabzGraph · A Roshan AI product
Preprint

Patient graphs that know who acted.

Typed relations keep a drug’s effect apart from the clinician’s decision, and every edge points to its evidence.

0.06
False concept links / graph
vs 12.4 correlational
3,442
Surgical cases
+ 167 ICU records
100%
Edges with evidence
Each tied to its events
Try it

See NabzGraph build a patient graph.

Pick a patient, build the graph, then select a node to see its evidence. Prerendered example.

patientSurgical case · propofol and remifentanil titrated to MAP and HR
illustrative9 nodes · 12 edges
CONCEPTSACTIONSVARIABLES
PersistentEpisodicTransientfilter edges
Typed relations

Every relation knows its type.

ResponsePropofol ↑ → MAP ↓

What a drug or ventilator change does to the patient.

PolicyRising MAP → remifentanil ↑

What the clinician does in response to the patient.

AssociationHypotension ↔ bradycardia

Findings that travel together, with no causal claim.

MechanisticPulse arrival time ↔ systolic pressure

Beat-by-beat couplings, tested per patient.

The dashboard

Three panels, one reasoning chain.

Graph view

Concept, action and beat nodes, joined by typed relations.

Evidence

Open the episodes, actions or beats behind any edge.

Patient timeline

Concept episodes and clinician actions across the case.

Results

Reliability you can measure.

0.06
False concept relations
vs 12.4 for correlational graphs
0.962
Concept AUROC
Held-out ICU patients, vs monitor
94.3%
Pulse timing tracks pressure
Of 2,884 surgical cases
35.7
Relations per graph
Each tied to its events

Research results on retrospective data. Not validated for clinical use.

Breadth

Coverage across data, concepts, and relations.

Data
  • VitalDB surgical casesBuilt
  • MIMIC-IV ICU recordsBuilt
  • Drug & ventilator actionsBuilt
  • Retrospective analysisBuilt
  • Real-time streamingRoadmap
Concepts
  • Tachycardia · bradycardiaBuilt
  • Hypotension · hypertensionBuilt
  • Tachypnea · bradypneaBuilt
  • Hypercapnia · hypocapniaBuilt
  • Beat-level conceptsBuilt
Relations
  • ResponseBuilt
  • PolicyBuilt
  • AssociationBuilt
  • MechanisticBuilt
  • Evidence on every edgeBuilt
FAQ

Questions we get a lot.

NabzGraph · Preprint

Bring your signals. See the graph behind the patient.