High-Frequency Ventilation and Tracheal Injuries

To the Editor.— We read with interest the study of Mammel et al.1 However, we wish to address several aspects of the report regarding the design of the investigation, their interpretation of the results and of other reports, and the conclusions they make. First, we take exception to the title itself. Unfortunately, many pediatricians and neonatologists do not make any distinction between the various types of nonconventional, high-frequency ventilators. High-frequency ventilation is a generic term encompassing several very different modalities of ventilation including high-frequency positive pressure ventilation, high-frequency flow interruption, high-frequency jet ventilation, and high-frequency oscillatory ventilation.