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Effect of Preoperative Inspiratory Muscle Training on Alveolar-Arterial Oxygen Gradients After Coronary Artery Bypass Surgery
Preoperative Inspiratory Muscle Training (IMT) with the Powerbreathe device was assessed with regard to whether A-a gradients and inspiratory muscle power would be improved after CABG. A group of 40 male patients were randomized to receiving (20) or not receiving (20) preop IMT. Postoperatively, the group receiving IMT had significantly better lung function (inspiratory muscle power, A-a gradient, oxygen saturation) .