Background: When the diaphragm moves from its level throughout complete expiration to its level during full inhalation, this movement is referred to as diaphragmatic excursion for short.

Aim and objectives: An evaluation of the value of the diaphragmatic excursion time index & the diaphragmatic rapid shallow breathing index, both of which were evaluated using ultrasonography,

Patients and methods: For the purpose of predicting the probability of effective weaning from mechanical ventilation & extubation, an assessment of the value of the diaphragmatic excursion time index and the diaphragmatic fast shallow breathing index was performed. Both of these indices were analysed using ultrasonography.

Results: 99 cases were enrolled in this study, there was not a statistically significant distinction amongst the three categories that were investigated as regards Ventilator hours till SBT p= 0.577. DETI and DRSBI at 30 minutes were more significant predictors of successful weaning than at the beginning of the SBT. Regarding DETI at 30 min, AUC was 0.965, Cutoff value was 1.3, Sensitivity was 99%and Specificity was 88.2%, while DRSBI at 30 min, AUC was 0.895, Cutoff value was 1.07, Sensitivity was 97.2% & Specificity was 86.5%.

Conclusion: When it comes to predicting the result of weaning, comparatively, the diagnostic accuracy of the DETI and DRSBI were better than that of the standard RSBI in supporting clinical decision-making regarding the release of patients from mechanical ventilation.