More than twenty years have passed since Principles andPractice of Mechanical Ventilation was fi rst conceived. Withthis third edition, the textbook has come of age. When thefi rst proposal of the book was under consideration, reviewersthought that the corpus of knowledge pertaining tomechanical ventilation would not be suffi cient to merit thepublication of a large tome; they opined that the contents ofsuch a book would require much padding. Th is time around,the challenge has been to fi t everything into a constrainednumber of pages. Virtually every aspect of mechanical ventilationhas evolved substantially over the past twenty years,and many new areas have emerged. Novel ventilator modeshave been introduced, previously discarded modes have acquireda new lease of life, and long-surviving methodologieshave undergone considerable refi nement. Much of theprogress has stemmed from research into the mechanismswhereby ventilators harm patients. In turn, we have learnedhow minor adjustments to ventilator settings can markedlyenhance patient comfort and survival. A comparison of thethird and fi rst editions of Principles and Practice of MechanicalVentilation provides proof of the tremendous progress inthis fi eld during the past twenty years.Trainees hear much about the practice
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