Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF ++ DEAN R. HESS, PhD, RRT ++ Teaching Associate in Anaesthesia ++ Harvard Medical School ++ Respiratory Care Services ++ Massachusetts General Hospital ++ Lecturer ++ Northeastern University ++ Boston, Massachusetts ++ ++ ROBERT M. KACMAREK, PhD, RRT ++ Professor of Anaesthesia ++ Harvard Medical School ++ Director of Respiratory Care Services ++ Massachusetts General Hospital ++ Boston, Massachusetts