The Role of Elastic Power in Predicting the Severity and Mortality in Adult Patients With ARDS Due to Pneumonia

Inclusion Criteria6

• Age from 18 to 65 years (male or female). Patients fulfilling criteria of ARDS as per Berline definition who will be admitted to ICU , intubated and MV more than 48 hours will be included in this study.
• Fulfillment of Criteria of readiness for ARDS as per Berline definition :
• an acute onset (<1 week of a known clinical insult or new or worsening respiratory symptoms),
• respiratory failure not primarily due to hydrostatic edema,
• bilateral opacities on a chest radiograph (not fully explained by effusions, lobar or lung collapse, or nodules), and
• <300 mmHg of the ratio of arterial partial pressure of oxygen (PaO2) to the fraction of inspired oxygen (FiO2) (PaO2/FiO2) with 5 cm H2O of positive end-expiratory pressure (PEEP) or continuous positive airway pressure. To facilitate the estimation of the ARDS prognosis, the Berline definition classifies the severity of ARDS into 3 categories: mild (200 mmHg < PaO2/FiO2 < 300 mmHg), moderate (100 mm Hg < PaO2/FiO2 <200 mmHg), and severe (PaO2/FiO2 < 100 mmHg).