Hemodynamics, fluids & transfusion
Agreement between manual and automatic ultrasound measurement of the velocity–time integral in the left ventricular outflow tract in intensive care patients: evaluation of the AUTO-VTI® tool
Authors' conclusion
The new auto-VTI® tool, despite interesting feasibility, demonstrated an insufficient agreement with a systematic bias and an insufficient precision limiting its implementation in critically ill patients.
Study context
- Population
- Intensive care unit (ICU) patients with acute circulatory failure, Nîmes University Hospital
- Participants
- 70 patients
- Exposure
- Automated vs manual measurement of velocity-time integral in the left ventricular outflow tract (VTI-LVOT)
- Outcome
- Agreement between automated and manual measurements of VTI-LVOT
Methodological detailsprospective, single-centre, interventional
- Prospective
- Single-centre
- Interventional
Main finding
As reported in the abstract
Agreement between automated (auto-VTI®) and manual VTI-LVOT measurement
- Proportion of agreement at 15% difference threshold
- 68% [58%; 80%]
- Feasibility of auto-VTI®
- 94%
- Precision, manual VTI measurement
- 7.4
- Least significant change, manual VTI measurement
- 10.5%
- Precision, automated method (by inference)
- 28%
- Least significant change, automated method (by inference)
- 40%
Observational data: associations, not effects.
Further findings
| Outcome | auto-VTI® | Manual |
|---|---|---|
| Precision and least significant changeAutomated values by inference | ||
| Precision | 28% | 7.4 |
| Least significant change | 40% | 10.5% |
- Feasibility of auto-VTI®
- 94%
Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.
Original publication
Agreement between manual and automatic ultrasound measurement of the velocity–time integral in the left ventricular outflow tract in intensive care patients: evaluation of the AUTO-VTI® tool. J Clin Monit Comput. Published 17 September 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →