Year: 2020
Type: article
Abstract: Recently, Wong et al. reported increased 28-day mortality among 328 children with pediatric acute respiratory distress syndrome (PARDS) managed with high-frequency oscillatory ventilation (HFOV) [1].This study is an excellent example of gaining a better understanding of pediatric critical care through multicenter collaboration.Nonetheless, there are some nuances one should consider before interpreting the study results.Inherent to the study design, confounding by indication (i.e., the sickest patients are those most likely to receive a specific intervention) occurred albeit that the authors used advanced statistical techniques to address this.Furthermore, HFOV was largely employed as rescue without consistent criteria for its use and clinical management was done without a consistent protocol.Although HFOV has been available for several decades, we have no data demonstrating an optimal physiologic approach to HFOV management in the acute and weaning phase.Most pediatric HFOV papers make no mention of recruitment maneuvers (RMs) and reported frequencies (F) in the range of 5-8 Hz [2].Yet, optimizing lung volume by means of a RM may be physiologically necessary to recruit collapsed, atelectatic lung units to improve oxygenation and prevent exposure to larger, potentially more injurious pressure swings [3].Low F is not in line with the concept of the corner frequency (Fc) [4].Fc is the F with the lowest pressure cost of ventilation and thus the least injurious to the lung.In disease conditions with reduced respiratory system compliance, such as PARDS, Fc is increased indicating that the highest oscillatory F that still allows for adequate
Source: Critical Care
Language: English
Subfield: Pulmonary and Respiratory Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $3,290
OpenAlex ID: W3013370870