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How Much Lung Ventilation is Obtained with Only Chest-compression CPR?

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Cardiovascular Engineering

Abstract

The objective of this 14-pig study was designed to determine the amount of lung ventilation obtainable by only rhythmic chest compression (100/min, 100 lbs). Tidal volume (TV), dead space (DS), and respiration rate (R) were measured with normal breathing and with rhythmic chest compression during ventricular fibrillation. The ratio of TV/DS was calculated in both cases. For normal breathing the ratio was 2.54 ± 0.68; for chest compression breathing the ratio was 0.80 ± 0.07. Minute alveolar ventilation (TV − DS)R was computed for both cases. With spontaneous breathing, the minute alveolar volume was 5.48 ± 2.1 l/min. With only chest-compression breathing, the alveolar ventilation was −1.49 ± 0.64 l/min. The negative minute alveolar volume and fractional ratio reveals that TV was less than the dead space indicating that chest-compression alone does not ventilate the lungs.

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Acknowledgements

The authors wish to acknowledge the assistance of Amy Peterson, Melissa Bible, and Gena Brock, registered veterinary technicians who were responsible for anesthesia and instrumenting the animals. Funding was provided for this study by the Purdue University TRASK fund. This sponsor had no other involvement. The manuscript, as submitted or its essence in another version, is not under consideration for publication elsewhere, and will not be published elsewhere while under consideration by Resuscitation. Potential reviewers of this application would be Ray Fish, MD, PhD (rfish@uiuc.edu), John Boe, MD (jomboe@iupui.edu), and Robert Lew, MD, (robert.lew@barnardassociates.com) or (RaLew@aol.com). I ask that you do not include Karl Kern or Gordon Ewy as potential reviewers.

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Authors and Affiliations

  1. Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN, 47907-2032, USA

    L. A. Geddes, A. Rundell & M. Pargett

  2. Basic Medical Sciences, Purdue University, West Lafayette, IN, USA

    M. Otlewski

Authors
  1. L. A. Geddes
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  2. A. Rundell
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  3. M. Otlewski
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  4. M. Pargett
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Corresponding author

Correspondence to L. A. Geddes.

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Supported by the Purdue Trask Fund.

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Geddes, L.A., Rundell, A., Otlewski, M. et al. How Much Lung Ventilation is Obtained with Only Chest-compression CPR?. Cardiovasc Eng 8, 145–148 (2008). https://doi.org/10.1007/s10558-008-9058-8

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  • DOI: https://doi.org/10.1007/s10558-008-9058-8

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