Benefits
- Benefit
-
Fell by 11.2 minutes (95% CI 4.2 to 18.2) after activation
Awaiting review
- Outcome identifiers
-
Unresolved
Not reviewedUnresolved
- Category
-
Reduced Task Time
Awaiting review
- Status
-
Reported benefit
Awaiting review
- Beneficiary groups
-
People. Organizations.
Awaiting review
- Beneficiaries
-
Unresolved
Not reviewedUnresolved
- Reach
-
Unresolved
Not reviewedUnresolved
- Distribution and access
-
Unresolved
Not reviewedUnresolved
- Duration
-
Unresolved
Not reviewedUnresolved
- Expected?
-
Yes
Awaiting review
- Costs and harms
-
Unresolved
Not reviewedUnresolved
AI system
- System
-
Viz.ai automated large vessel occlusion detection with secure group messaging
Awaiting review
- Model
-
This is an explicit unresolved assignment: the sources on record do not settle this question.
Not reviewedUnresolved
- Release
-
Unresolved
Not reviewedUnresolved
- Provider
-
Unresolved
Not reviewedUnresolved
- Role
-
Unresolved
Not reviewedUnresolved
- Configuration
-
Unresolved
Not reviewedUnresolved
- Inputs and outputs
-
Unresolved
Not reviewedUnresolved
- Autonomy
-
Unresolved
Not reviewedUnresolved
- Workflow
-
Every CT angiogram for suspected stroke went to the cloud algorithm automatically. Alerts reached clinicians and radiologists by phone with secure group messaging.
Awaiting review
- Human oversight
-
Unresolved
Not reviewedUnresolved
- Relation to AI
-
Centers switched the software on in random order, so the trial compares treatment times with and without the AI alerts; the alerts came bundled with secure group messaging, which the trial does not separate from the detection.
Awaiting review
- AI contribution
-
Centers switched the software on in random order, so the trial compares treatment times with and without the AI alerts; the alerts came bundled with secure group messaging, which the trial does not separate from the detection.
Awaiting review
Measurement
- Studies
- Study design
- Measurement
-
Study 1: Door-to-groin time from stroke registry data; mixed-effects linear regression with center as random effect. Study 2: Systematic review and meta-analysis of before/after cohorts and one randomized trial. [1] [2]
- Setting and sample
-
Study 1: 243 emergency department patients with large vessel occlusion stroke treated with thrombectomy at four centers, January 2021 to February 2022. Study 2: 12 studies, 15,595 patients, stroke centers in several countries. [1] [2]
- Measures
-
Study 1: Door-to-groin time. Study 2: Door-to-groin time and other workflow times (standardized mean difference). [1] [2]
- Comparison
-
Study 1: Unexposed periods at the same centers. Study 2: Periods before Viz.ai implementation. [1] [2]
- Results
-
Study 1: 11.2 minutes shorter (95% CI 4.2 to 18.2). Study 2: Door-to-groin SMD -0.50 (95% CI -0.66 to -0.35). [1] [2]
- Additional value from AI
-
Study 1: 11.2 minutes. Study 2: Shorter workflow times; no significant change in clinical outcomes. [1] [2]
- Limitations
-
Study 1: Small number of clusters; transfers excluded; senior author received grants from the developer. Study 2: Mostly observational source studies, several by developer-linked authors. [1] [2]
Money
- Kind of value
-
The kind of monetary value is unclear.
Not reviewedUnresolved
- Amount
-
The monetary value is not established.
Not reviewedUnresolved
- Currency and prices
-
The currency and price basis are unclear.
Not reviewedUnresolved
- Period and unit
-
The period and unit of the monetary estimate are unclear.
Not reviewedUnresolved
- Realization
-
Whether the monetary value was realized is unclear.
Not reviewedUnresolved
- Recipients and payers
-
The recipients and payers are unclear.
Not reviewedUnresolved
- Gross or net
-
Whether the monetary figure includes costs is unclear.
Not reviewedUnresolved
- Included costs
-
The costs included in the estimate are unclear.
Not reviewedUnresolved
- Comparison
-
The financial comparison is not established.
Not reviewedUnresolved
- Method
-
The method used to calculate monetary value is unclear.
Not reviewedUnresolved
- Return and payback
-
The return on investment or payback period is not established.
Not reviewedUnresolved
People and places
- Participants
-
Developer:
Viz.ai. Operator: Four comprehensive stroke centers in the greater Houston area (UTHealth Houston trial).Awaiting review
- Jurisdictions
-
Benefit: Four comprehensive stroke centers, greater Houston, Texas,
United States. Developer: United States. Operator: United States.Awaiting review
- Ownership and control
-
Unresolved
Not reviewedUnresolved
- Dependencies
-
Unresolved
Not reviewedUnresolved
- Cross-border connections
-
Unresolved
Not reviewedUnresolved
- Geopolitical implications
-
The geopolitical implications are unclear.
Not reviewedUnresolved
Follow-up
- Conditions for replication
-
Stroke teams must act on phone alerts before the formal report. The centers must have thrombectomy capacity on site.
Awaiting review
- Replication attempts
-
2 follow-up entries. Benefit recurred: 2.
Awaiting review
- Later findings
-
Unresolved
Not reviewedUnresolved
- Availability
-
Unresolved
Not reviewedUnresolved
- Institutional decision
-
A relevant institutional decision has not been established.
Not reviewedUnresolved
- Grounds
-
The grounds for an institutional decision are unclear.
Not reviewedUnresolved
- Action and result
-
The result of an institutional decision is not established.
Not reviewedUnresolved
- Success criterion
-
The criterion for a successful institutional decision is unclear.
Not reviewedUnresolved
Evidence
- Source numbers
-
AIBD-0637-source-0001–0002
Awaiting review
- Citations
-
Numbered references below.
Awaiting review
- Language
-
Unresolved
Not reviewedUnresolved
- Source relationships
-
Developer, Independent
Awaiting review
- Original evidence
-
Unresolved
Not reviewedUnresolved
- Access and versions
-
Unresolved
Not reviewedUnresolved
- Supported findings
-
Unresolved
Not reviewedUnresolved
- Evidence links
-
Unresolved
Not reviewedUnresolved
- Evidence strength
-
Independently studied. Sources: one independent peer-reviewed study and the makers' peer-reviewed study. The cited evidence includes no finding by a regulator or court. [1] [2]
- Missing evidence
-
Unresolved
Not reviewedUnresolved
Grades
- Assessed benefits
-
People. Organizations.
Awaiting review
- Depth
-
People: 2. Organizations: 1.
Awaiting review
- Reasons
-
People: Patients reached thrombectomy 11.2 minutes sooner after hospital arrival, in a treatment whose benefit depends on time. Organizations: Time from CT to thrombectomy start fell by 9.8 minutes.
Awaiting review
- Observed or intended
-
Unresolved
Not reviewedUnresolved
- Rubric
-
Unresolved
Not reviewedUnresolved
- Assessor and date
-
Unresolved
Not reviewedUnresolved
- Alternative assessments
-
Unresolved
Not reviewedUnresolved
- Fill
-
Independently studied
Awaiting review
Entry details
- Kind
-
The case describes an evaluation or a study. A cluster-randomized stepped-wedge trial. [1]
Fully reviewed: supporting details for Kind
Review date: 29 October 2026.
Sources: [1]
- Related entries
-
No incident in the AI Incident Database snapshot of 26 October 2026 concerns the same kind of system harming the same kind of stakeholder.
Partly reviewedUnresolved: supporting details for Related entries
Compared with the incidents in the AI Incident Database snapshot of 26 October 2026.
- Field
-
Healthcare.
Awaiting review
- Purpose
-
The software was built to detect large vessel occlusion on CT angiograms and alert stroke teams. Faster thrombectomy was that purpose.
Awaiting review
- Dates
-
Observed: 27 February 2022. Updated: 29 October 2026.
Awaiting review
- Stage
-
The system was in routine use. The software was activated for clinical use at each center during the trial. [1]
Fully reviewed: supporting details for Stage
Review date: 29 October 2026.
Sources: [1]
- Version
-
SHA-256: b0bfdaee5186…
Awaiting review: supporting details for Version
SHA-256 of the public case, its assessments, and its displayed answers and notes, excluding its own identifier and the derived coverage summary.
References
- Other identifiers
-
Unresolved
Not reviewedUnresolved
- Category mappings
-
Unresolved
Not reviewedUnresolved
- Citable summary
-
Unresolved
Not reviewedUnresolved
- Revisions
-
1 revision. Latest: 29 October 2026.
Awaiting review
Sources
-
Peer-reviewed study Developer
Martinez-Gutierrez JC, Kim Y, Salazar-Marioni S, et al. Automated Large Vessel Occlusion Detection Software and Thrombectomy Treatment Times: A Cluster Randomized Clinical Trial. JAMA Neurol. 2023;80(11):1182-1190.
In mixed-effects linear regression, implementation of the AI algorithm was associated with a reduction in DTG time by 11.2 minutes (95% CI, -18.22 to -4.2).
-
Peer-reviewed study Independent author
Sarhan K, Azzam AY, Moawad MHED, et al. Automated Emergent Large Vessel Occlusion Detection Using Viz.ai Software and Its Impact on Stroke Workflow Metrics and Patient Outcomes in Stroke Centers: A Systematic Review and Meta-analysis. Transl Stroke Res. 2025;16(6):2258-2271.
The pooled analysis demonstrated that the implementation of the Viz.ai algorithm was associated with lesser CT scan to EVT time (SMD -0.71, 95% CI [-0.98, -0.44], p < 0.001) and DTG time (SMD -0.50, 95% CI [-0.66, -0.35], p < 0.001)