Single Breath Counting Test for Acute Respiratory Failure in Emergency Department

The purpose of the study is to determine whether SBCT is a useful tool for diagnosing the main form of failure respiratory acute and to define the SBCT limit associated with insufficiency respiratory in this population, the requirement for NIV or invasive ventilation. Furthermore, the correlation with the most common scores and indices used in the emergency room will be studied, such as: HACOR, MEW, REMS SCORE, ROS, CURB-65, qSOFA, SEVERITY INDEX OF PNEUMONIA, GWTG HF, LUNG ULTRASOUND SCORE, SINGLE BREATH COUNT