Use of Bedside Ultrasonography on the Incidence of Acute Renal Failure in High-risk Surgical Patients

"Protocol:~* US 4 pulmonary quadrants in each hemithorax: anterior and lateral, upper and lower regions (figure 1)~* US inferior vena cava, collaborative index or distensibility according to the patient's conditions, in spontaneous or controlled ventilation, respectively.~* Cardiac US: subjective evaluation of contractility in normal, discreetly reduced or severely reduced."