Objective To evaluate the diagnostic value and potential therapeutic impact of Peking Union Medical College Hospital critical ultrasonic management(PCUM)in the early management of critically ill patients with acute respiratory failure(ARF).Methods Patients admitted into the ICU of Peking Union Medical College Hospital Objective To evaluate the diagnostic value and potential therapeutic impact of Peking Union Medical College Hospital critical ultrasonic management (PCUM) in the early management of critically ill patients with acute respiratory failure (ARF). Patients Patients admitted into the ICU of Peking Union Medical College Hospital