• Resuscitation · Jun 2004

    Randomized Controlled Trial Multicenter Study Clinical Trial

    Evaluation of an impedance threshold device in patients receiving active compression-decompression cardiopulmonary resuscitation for out of hospital cardiac arrest.

    • Patrick Plaisance, Keith G Lurie, Eric Vicaut, Dominique Martin, Pierre-Yves Gueugniaud, Jean-Luc Petit, and Didier Payen.
    • Department of Anesthesiology and Critical Care, Lariboisière University Hospital, 2 Rue Ambroise Paré, 75010 Paris, France. plaisance@claranet.fr
    • Resuscitation. 2004 Jun 1;61(3):265-71.

    AimsThe purpose of this multicentre clinical randomized controlled blinded prospective trial was to determine whether an inspiratory impedance threshold device (ITD), when used in combination with active compression-decompression (ACD) cardiopulmonary resuscitation (CPR), would improve survival rates in patients with out-of-hospital cardiac arrest.Methods And ResultsPatients were randomized to receive either a sham (n = 200) or an active impedance threshold device (n = 200) during advanced cardiac life support performed with active compression-decompression cardiopulmonary resuscitation. The primary endpoint of this study was 24 h survival. The 24 h survival rates were 44/200 (22%) with the sham valve and 64/200 (32%) with the active valve (P = 0.02). The number of patients who had a return of spontaneous circulation (ROSC), intensive care unit (ICU) admission, and hospital discharge rates was 77 (39%), 57 (29%), and 8 (4%) in the sham valve group versus 96 (48%) (P = 0.05), 79 (40%) (P = 0.02), and 10 (5%) (P = 0.6) in the active valve group. Six out of ten survivors in the active valve group and 1/8 survivors in the sham group had normal neurological function at hospital discharge (P = 0.1).ConclusionThe use of an impedance valve in patients receiving active compression-decompression cardiopulmonary resuscitation for out-of-hospital cardiac arrest significantly improved 24 h survival rates.

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