A parameter missing from an AI report does not mean a normal finding. This is the practical message of a peer-reviewed study published on 10 October 2026 in Emergency Medicine Australasia.
What the study found
Across four Australian EDs, 195 echocardiograms were retrospectively reviewed by experts and compared with Us2.ai. Agreement was 76% where both provided an interpretation. AI supplied a classification in 46% of parameter evaluations under ASE/EACVI multi-view criteria; yield increased to 70% using author-defined pragmatic criteria. These figures are not diagnostic accuracy or the proportion of entirely normal examinations.
The evaluated algorithm did not report pericardial effusion, aortic regurgitation or mitral stenosis. Unassessed parameters were omitted without explicit notification. This is an agreement study, not a prospective safety trial or evidence of improved clinical outcomes.
Why it matters for ED and EMS practice
In shock, dyspnoea or chest pain, an apparently complete report may provide false reassurance. Clinicians must actively assess relevant findings, review images and integrate POCUS with clinical examination, ECG and haemodynamics. The findings do not validate prehospital use.
Availability and limitations
The manufacturer reports EU MDR Class IIb CE marking for Us2.ai. This is manufacturer documentation, separate from the peer-reviewed evidence. Operational availability in Italian EDs has not been verified. Check the certificate, instructions for use and software version: limitations of the studied algorithm should not automatically be attributed to every subsequent release.
Before adoption
Confirm which parameters are covered and how unassessed findings are flagged. Validate performance on local images, including incomplete or poor-quality studies, and retain human review and an audit trail of corrections. With data protection and IT teams, assess GDPR/DPIA requirements, processing agreements, retention and data transfers. Do not upload identifiable DICOM images to consumer tools.
Sources
Manivel et al., Emergency Medicine Australasia, 10 ottobre / October 2026 · Full text · Us2.ai — Regulatory status (manufacturer)
Prepared with the assistance of artificial intelligence using the cited sources. For information and education; it does not replace clinical judgement, guidelines or local protocols.