Background: Preliminary research has shown that pulmonary ultrasonography (PU) has become a vital tool for quickly
diagnosing the cause of acute respiratory failure (ARF), as well as monitoring therapy progress in critically sick patients.
The aim of the present study is to examine the relationship between the PU grading system and clinical metrics to
identify the etiology of ARF with assessment of treatment response. Patients and methods: A prospective cohort study
of 50 ARF patients was recruited from Benha University Hospital's respiratory, general, and coronary critical care units.
PU examinations were performed at 3 time points during a patient’s ICU stay at intubation, 48 hours after intubation
and after extubation. Results: The research comprised 28 men and 22 women. The average age of participants was 58
years old. COVID-19 was the most common diagnosis (46%). Average intubation was 6.42 days, with a P/F ratio of
172.14 and average length of stay in the ICU 10.06 days. The average length of stay in the hospital was 12.6 days, with
death rate 68%. Mean first US score was 18.1 and second US score 17.54. The first total US score had a substantial
positive association with mortality rate. The initial total US score had also a substantial positive link with the length of
ICU stay and ventilation days (p