Ventilatory adjuncts
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Updated: Oct 2, 2026

Mechanical Ventilation Boot Camp Curriculum
Published on: March 12, 2018
1Department of Respiratory Care Services, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts 02114, USA. rkacmarek@partners.org
Abstract:
A number of adjuncts to mechanical ventilation have been the focus of recent research. Automatic tube compensation (the regulation of airway pressure by estimation of tracheal pressure) appears to be an ideal approach to unloading the resistive effort imposed by the endotracheal tube. Randomized controlled trials have recently been performed with high frequency oscillation (HFO), partial liquid ventilation (PLV), and prone positioning. Unfortunately, all of those trials were negative; however, it appears the only technique that will be abandoned for the near future is PLV. The HFO trial trended toward benefit with HFO, and one must question the protocol used in the prone positioning trial. With both HFO and prone positioning we will have to wait for additional randomized clinical trials before the status of those techniques can be determined. No randomized trials of tracheal gas insufflation have been performed. Of major concern with tracheal gas insufflation is the lack of a commercial product.
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