Respiratory failure & ventilation
Using automatic speckle tracking imaging to measure diaphragm excursion and predict the outcome of mechanical ventilation weaning
Authors' conclusion
Automatic speckle tracking analysis of the diaphragm showed high consistency with conventional manual ultrasound measures. Diaphragmatic excursion and its excursion velocity helped predict mechanical ventilation weaning failure, prolonged weaning, as well as in-hospital adverse outcomes.
Study context
- Population
- Critically ill mechanically ventilated subjects undergoing speckle-tracking ultrasonography of the right/left hemidiaphragm before the SBT88 completed follow-up
- Participants
- 160 participants
- Comparison
- Mean excursion vs Diaphragmatic velocity
- Outcome
- Predictive value of automatic speckle tracking diaphragm excursion for weaning outcome
Methodological detailsprospective, multicentre, observational, pilot
- Prospective
- Multicentre
- Observational
- Pilot
Performance
As reported in the abstract
Weaning failure
| Test or model | Area under the ROC curve (AUROC) |
|---|---|
| Excursion | 0.659 |
Excursion
Area under the ROC curve (AUROC)0.659
Further findings
| Outcome | Values |
|---|---|
| Correlation of automatic vs manual measurement | Excursion R 0.69 · Velocity R 0.65 |
| Prolonged weaning | Excursion AUROC 0.824 · Velocity AUROC 0.786 |
| In-hospital death/withdrawal of treatment | Excursion AUROC 0.653 |
Incidence of weaning failure
- Overall incidence of weaning failure
- 43.18%
Correlation of automatic vs manual measurement
- Significant correlation between automatic and manual measurement
Prolonged weaning
- High diagnostic values for prolonged weaning
In-hospital death/withdrawal of treatment
- Moderate diagnostic value
Original publication
Using automatic speckle tracking imaging to measure diaphragm excursion and predict the outcome of mechanical ventilation weaning. Crit Care. Published 14 January 2023. doi:10.
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