Weaning Outcome is Associated with ELWI and Impaired Diastolic Function
Dimitra Bagka1, George Zakynthynos2, Vasiliki Tsolaki1
1General University Hospital of Larissa, Larisa, Greece.
Summary
Extravascular lung-water index (ELWI) and impaired diastolic function predict weaning success in critical care patients. Assessing these factors can improve risk stratification for mechanical ventilation weaning.
Area of Science:
- Critical Care Medicine
- Pulmonary Medicine
- Cardiology
Background:
- Mechanical ventilation weaning is a critical process in intensive care.
- Predicting successful weaning remains challenging, impacting patient outcomes and resource utilization.
Purpose of the Study:
- To evaluate hemodynamic profiles during spontaneous breathing trials (SBTs) in critical care patients.
- To identify predictors of weaning failure following mechanical ventilation.
Main Methods:
- Prospective observational study in non-cardiac ICU patients ready for weaning.
- Collected clinical, echocardiographic, and thermodilution data before and after a 2-hour SBT.
- Defined weaning as 48 hours of spontaneous breathing post-SBT.
Main Results:
- Weaning success was associated with Extravascular Lung-Water Index (ELWI), global end-diastolic index, and diastolic function (E/Em).
- 56% of patients meeting weaning criteria had ELWI ≥ 7mL/kg.
- ELWI, impaired pulmonary permeability, and left ventricular diastolic dysfunction independently determined ELWI.
Conclusions:
- ELWI and impaired diastolic function (pre-SBT E/Em) are potential determinants of weaning outcome.
- Assessing ELWI and diastolic function may enhance risk stratification for weaning decisions.
