Comparison of high-frequency oscillation and tracheal gas insufflation versus standard high-frequency oscillation at two levels of tracheal pressure
- 16 March 2010
- journal article
- research article
- Published by Springer Science and Business Media LLC in Intensive Care Medicine
- Vol. 36 (5), 810-816
- https://doi.org/10.1007/s00134-010-1822-8
Abstract
In acute respiratory distress syndrome (ARDS), combined high-frequency oscillation (HFO) and tracheal gas insufflation (TGI) may improve oxygenation through a TGI-induced increase in mean tracheal pressure (P tr). We compared standard HFO and HFO-TGI matched for P tr, in order to determine whether TGI affects gas exchange independently from P tr. We conducted a prospective, randomized, crossover, physiological study in a 37-bed intensive care unit. Twenty-two patients with early acute lung injury (ALI) or ARDS were enrolled. On day 1, patients were ventilated with HFO, without (60 min) and combined with TGI (60 min) in random order. HFO/HFO-TGI sessions were repeated in inverse order within 7 h. HFO/HFO-TGI mean airway pressure (P aw) was titrated to a P tr that was either equal to (low P aw) or 3 cmH2O higher than (high P aw) the P tr of the preceding conventional mechanical ventilation. On day 2, the protocol was repeated at the alternative P tr level relative to day 1. Gas exchange and hemodynamics were determined before, during, and after HFO/HFO-TGI sessions. HFO-TGI-high P aw versus HFO-high P aw resulted in significantly higher PaO2/inspired O2 fraction (FiO2) [mean ± standard error of the mean (SEM): 281.6 ± 15.1 versus 199.0 ± 15.0 mmHg; mean increase: 42%; P < 0.001]. HFO-TGI-low P aw, versus HFO-low P aw, resulted in significantly higher PaO2/FiO2 (222.8 ± 14.6 versus 141.3 ± 8.7 mmHg; mean increase: 58%; P < 0.001). PaCO2 was significantly lower during HFO-TGI-high P aw versus HFO-high Paw (45.3 ± 1.6 versus 53.7 ± 1.9 mmHg; mean decrease: 16%; P = 0.037). At the same P tr level, HFO-TGI results in superior gas exchange compared with HFO.Keywords
This publication has 21 references indexed in Scilit:
- Total and regional lung volume changes during high-frequency oscillatory ventilation (HFOV) of the normal lungRespiratory Physiology & Neurobiology, 2009
- Tidal volume delivery during high-frequency oscillatory ventilation in adults with acute respiratory distress syndrome*Critical Care Medicine, 2007
- Acute effects of combined high-frequency oscillation and tracheal gas insufflation in severe acute respiratory distress syndrome*Critical Care Medicine, 2007
- Effects of expiratory tracheal gas insufflation in patients with severe head trauma and acute lung injuryIntensive Care Medicine, 2004
- Expiratory Washout versus Optimization of Mechanical Ventilation during Permissive Hypercapnia in Patients with Severe Acute Respiratory Distress SyndromeAmerican Journal of Respiratory and Critical Care Medicine, 1999
- Tracheal gas insufflation combined with high-frequency oscillatory ventilationCritical Care Medicine, 1996
- The American-European Consensus Conference on ARDS. Definitions, mechanisms, relevant outcomes, and clinical trial coordination.American Journal of Respiratory and Critical Care Medicine, 1994
- Calculation of the transverse acoustoelectric voltage in a piezoelectric-extrinsic semiconductor structureJournal of Applied Physics, 1989
- Regional alveolar pressure during periodic flow. Dual manifestations of gas inertia.JCI Insight, 1985
- Electron mobility in single and multiple period modulation-doped (Al,Ga)As/GaAs heterostructuresJournal of Applied Physics, 1982