Abstract Background Patients undergoing general anesthesia and mechanical ventilation during major abdominal surgery commonly develop pulmonary atelectasis and/or hyperdistention of the lungs. Recent studies show benefits of lung-protective mechanical ventilation with the use of low tidal volumes. a moderate level of positive end-expiratory pressure (PEEP) and regular alveolar recruit... https://parisnaturalfoodes.shop/product-category/biotin-shampoo/