Variation in Definition of Prolonged Mechanical Ventilation

Department of Critical Care Medicine, Sunnybrook Health Sciences Centre; the Lawrence S Bloomberg Faculty of Nursing and the Interdepartmental Division of Critical Care Medicine, University of Toronto; and the Provincial Centre of Weaning Excellence, Toronto East General Hospital, Toronto, Ontario, Canada.

Royal Victoria Hospital, Belfast, Northern Ireland.

SickKids Hospital and the Division of Respirology, University of Toronto, Toronto, Ontario, Canada.

Saint Michael's Hospital; the Li Ka Shing Knowledge Institute; and the Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada.

Lane Fox Respiratory Unit, St Thomas's Hospital, Guy's and St Thomas's NHS Foundation Trust, London, United Kingdom.

Lane Fox Respiratory Unit, St Thomas's Hospital, Guy's and St Thomas's NHS Foundation Trust, and King's College London, London, United Kingdom.

Pediatric Intensive Care Unit, Department of Pediatrics, Sainte-Justine Hospital, and the University of Montreal, Montreal, Quebec, Canada.

Department of Respirology, Children's Hospital of Eastern Ontario, and the CHEO Research Institute, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.

Critical Care Western and London Health Sciences Centre and Western University, London, Ontario, Canada.

Critical Care Western and London Health Sciences Centre, London, Ontario, Canada.

Royal Victoria Hospital and the Centre for Experimental Medicine, Queen's University, Belfast, Northern Ireland.

Laboratory of Experimental Intensive Care and Anesthesiology, Academic Medical Center, University of Amsterdam, Amsterdam-Zuidoost, The Netherlands.

Centre for Experimental Medicine, Queen's University, Belfast, Northern Ireland.