• Journal of critical care · Aug 2013

    Effectiveness of end-expiratory lung volume measurements during the lung recruitment maneuver for patients with atelectasis.

    • Susumu Nakahashi, Satoshi Gando, Takehiko Ishikawa, Takeshi Wada, Yuichiro Yanagida, Nobuhiko Kubota, Shinji Uegaki, Mineji Hayakawa, and Atsushi Sawamura.
    • Division of Acute and Critical Care Medicine, Department of Anesthesiology and Critical Care Medicine, Hokkaido University Graduate School of Medicine, N15W7 Kita-ku, Sapporo 060-8638, Japan. n14w4@s3.dion.ne.jp
    • J Crit Care. 2013 Aug 1;28(4):534.e1-5.

    PurposeThe aim of this study was to determine whether the relative change in the end-expiratory lung volume (EELV) obtained by the recruitment maneuver (RM) can serve as an indicator of the change in the P/F ratio.Materials And MethodsThe effects of the intermittent stepwise increases in the RM (peak inspiratory pressure, 45, 50, and 55 cm H2O) were compared in 21 patients with atelectasis under mechanical ventilation. The EELV, the ratio of arterial oxygen concentration to the fraction of inspired oxygen P/F ratio, and relative change rate (Δ) in these parameters were evaluated after each RM.ResultsA greater improvement in the EELV (1157 ± 344 mL vs 1469 ± 396 mL) and P/F ratio (250 ± 99 vs 320 ± 92) was observed after the RM. The ΔEELV was correlated with the ΔP/F ratio (ρ = 0.73, P < .01) and was identified as an accurate predictor of the improvement of the ΔP/F ratio by the receiver operating characteristic curve (the area under the curve, 0.93; P < .01).ConclusionsThese results suggest that the ΔEELV obtained by intermittent stepwise RM can serve as an indicator of the change in the P/F ratio.Copyright © 2013 Elsevier Inc. All rights reserved.

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