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1 ﹒ Michael Z，Rolando B ﹒ Tracheostomy in the critically ill patient：who，when，and how ﹒ Clin Pul m Med ﹒ 2006，13：111‐120 ﹒.17 ﹒ Ridling DA，Martin LD ﹒ Endotracheal suctioning with or without instillation of isotonic sodium chloride solution in critical il ......