Lung Ultrasound and Electrical Impedance as Long-Term Monitoring Tools for Acute Respiratory Failure: Sometimes No Numbers Are Better Than Bad (or Confusing) Numbers*

1 Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada 2 Department of Critical Care Medicine, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada 3 Li Ka Shing Knowledge Institute, Keenan Research Centre, Toronto, ON, Canada 4 Department of Medicine, University of Toronto, Toronto, ON, Canada 5 Division of Critical Care, Department of Anesthesia, McMaster University, Hamilton, ON, Canada *See also p. e630. Drs. Goffi and Piraino received funding from Philips Healthcare. Dr. Piraino received funding from Drager and Aerogen.