OBJECTIVE: To describe the resolution of regional atelectasis and the development of regional lung overdistension during a lung-recruitment protocol in children with acute lung injury. DESIGN: Prospective interventional trial. SETTING: Pediatric intensive care unit. PATIENTS: Ten children with early (<72 hrs) acute lung injury. INTERVENTIONS: Sustained inflation maneuver (positive airway pressure of 40 cm H2O for 40 secs), followed by a stepwise recruitment maneuver (escalating plateau pressures by 5 cm H2O every 15 mins) until physiologic lung recruitment, defined by PaO2 + PaCO2 ≥400 mm Hg, was achieved. Regional lung volumes and mechanics were measured using electrical impedance tomography. MEASUREMENTS AND MAIN RESULTS: Patients that responded to the stepwise lung-recruitment maneuver had atelectasis in 54% of the dependent lung regions, while nonresponders had atelectasis in 10% of the dependent lung regions (p = .032). In the pressure step preceding physiologic lung recruitment, a significant reversal of atelectasis occurred in 17% of the dependent lung regions (p = .016). Stepwise recruitment overdistended 8% of the dependent lung regions in responders, but 58% of the same regions in nonresponders (p < .001). Lung compliance in dependent lung regions increased in responders, while compliance in nonresponders did not improve. In contrast to the stepwise recruitment maneuver, the sustained inflation did not produce significant changes in atelectasis or oxygenation: atelectasis was only reversed in 12% of the lung (p = .122), and there was only a modest improvement in oxygenation (27 ± 14 mm Hg, p = .088). CONCLUSIONS: Reversal of atelectasis in the most dependent lung region preceded improvements in gas exchange during a stepwise lung-recruitment strategy. Lung recruitment of dependent lung areas was accompanied by considerable overdistension of nondependent lung regions. Larger amounts of atelectasis in dependent lung areas were associated with a positive response to a stepwise lung-recruitment maneuver.
OBJECTIVE: To describe the resolution of regional atelectasis and the development of regional lung overdistension during a lung-recruitment protocol in children with acute lung injury. DESIGN: Prospective interventional trial. SETTING: Pediatric intensive care unit. PATIENTS: Ten children with early (<72 hrs) acute lung injury. INTERVENTIONS:Sustained inflation maneuver (positive airway pressure of 40 cm H2O for 40 secs), followed by a stepwise recruitment maneuver (escalating plateau pressures by 5 cm H2O every 15 mins) until physiologic lung recruitment, defined by PaO2 + PaCO2 ≥400 mm Hg, was achieved. Regional lung volumes and mechanics were measured using electrical impedance tomography. MEASUREMENTS AND MAIN RESULTS:Patients that responded to the stepwise lung-recruitment maneuver had atelectasis in 54% of the dependent lung regions, while nonresponders had atelectasis in 10% of the dependent lung regions (p = .032). In the pressure step preceding physiologic lung recruitment, a significant reversal of atelectasis occurred in 17% of the dependent lung regions (p = .016). Stepwise recruitment overdistended 8% of the dependent lung regions in responders, but 58% of the same regions in nonresponders (p < .001). Lung compliance in dependent lung regions increased in responders, while compliance in nonresponders did not improve. In contrast to the stepwise recruitment maneuver, the sustained inflation did not produce significant changes in atelectasis or oxygenation: atelectasis was only reversed in 12% of the lung (p = .122), and there was only a modest improvement in oxygenation (27 ± 14 mm Hg, p = .088). CONCLUSIONS: Reversal of atelectasis in the most dependent lung region preceded improvements in gas exchange during a stepwise lung-recruitment strategy. Lung recruitment of dependent lung areas was accompanied by considerable overdistension of nondependent lung regions. Larger amounts of atelectasis in dependent lung areas were associated with a positive response to a stepwise lung-recruitment maneuver.
Authors: Scott L Weiss; Mark J Peters; Waleed Alhazzani; Michael S D Agus; Heidi R Flori; David P Inwald; Simon Nadel; Luregn J Schlapbach; Robert C Tasker; Andrew C Argent; Joe Brierley; Joseph Carcillo; Enitan D Carrol; Christopher L Carroll; Ira M Cheifetz; Karen Choong; Jeffry J Cies; Andrea T Cruz; Daniele De Luca; Akash Deep; Saul N Faust; Claudio Flauzino De Oliveira; Mark W Hall; Paul Ishimine; Etienne Javouhey; Koen F M Joosten; Poonam Joshi; Oliver Karam; Martin C J Kneyber; Joris Lemson; Graeme MacLaren; Nilesh M Mehta; Morten Hylander Møller; Christopher J L Newth; Trung C Nguyen; Akira Nishisaki; Mark E Nunnally; Margaret M Parker; Raina M Paul; Adrienne G Randolph; Suchitra Ranjit; Lewis H Romer; Halden F Scott; Lyvonne N Tume; Judy T Verger; Eric A Williams; Joshua Wolf; Hector R Wong; Jerry J Zimmerman; Niranjan Kissoon; Pierre Tissieres Journal: Intensive Care Med Date: 2020-02 Impact factor: 17.440
Authors: Martin C J Kneyber; Daniele de Luca; Edoardo Calderini; Pierre-Henri Jarreau; Etienne Javouhey; Jesus Lopez-Herce; Jürg Hammer; Duncan Macrae; Dick G Markhorst; Alberto Medina; Marti Pons-Odena; Fabrizio Racca; Gerhard Wolf; Paolo Biban; Joe Brierley; Peter C Rimensberger Journal: Intensive Care Med Date: 2017-09-22 Impact factor: 17.440
Authors: Inéz Frerichs; Marcelo B P Amato; Anton H van Kaam; David G Tingay; Zhanqi Zhao; Bartłomiej Grychtol; Marc Bodenstein; Hervé Gagnon; Stephan H Böhm; Eckhard Teschner; Ola Stenqvist; Tommaso Mauri; Vinicius Torsani; Luigi Camporota; Andreas Schibler; Gerhard K Wolf; Diederik Gommers; Steffen Leonhardt; Andy Adler Journal: Thorax Date: 2016-09-05 Impact factor: 9.139