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- Open Access
Manual hyperinflation attenuates reduction of functional residual capacity in cardiac surgical patients: a randomized controlled trial
© Paulus et al. 2011
- Published: 1 March 2011
- Cardiac Surgery
- Mechanical Ventilation
- Coronary Artery Bypass Graft
- Artery Bypass
- Coronary Artery Bypass
Cardiac surgical patients show deterioration of functional residual capacity (FRC) after surgery. Manual hyperinflation (MH) aims at preventing airway plugging, and as such could prevent the reduction of FRC after surgery. The purpose of this study was to determine the effect of MH on FRC in cardiac surgical patients.
This was a randomized controlled trial of patients after elective coronary artery bypass graft and/or valve surgery admitted to the ICU of a university hospital. Patients were randomly allocated to routine MH strategy (MH within 30 minutes after arrival in the ICU and every 6 hours until tracheal extubation) or on-demand MH (MH only in cases of perceptible (audible) sputum in the larger airways or in case of a drop in SpO2) during mechanical ventilation. The primary endpoint was the change of FRC from the day before cardiac surgery to 1, 3, and 5 days after tracheal extubation. Secondary endpoints were SpO2, on the same time points, and chest radiograph abnormalities at day 3.
MH attenuates the reduction of FRC in the first three postoperative days after cardiac surgery.
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.