Ultrasound Assessment During Weaning from Mechanical Ventilation

Inclusion Criteria: * Adult patients (18 years or older). * Receiving mechanical ventilatory assistance for more than 48 hours. * The patient is deemed ready to undergo a Spontaneous Breathing Trial, as determined by the attending physician. * Ultrasound measurements are performed between 20 and 30 minutes after the initiation of the trial. Exclusion Criteria: * Patients with known or diagnosed neuromuscular disease. * Limitation of therapeutic effort * History of severe valvulopathy, severe coronary artery disease, known left ventricular ejection fraction \<35%, or known grade 3 diastolic dysfunction, or who are considered candidates for tracheostomy due to their severity. * History of home ventilatory support * Patients who do not have a good acoustic window or have any type of limitation to perform pulmonary, cardiac, or diaphragmatic ultrasound. * Patients who at the discretion of the treating medical team cannot be placed on a T-tube.