Article Document Academic Article Information Content Entity Continuant Continuant Journal Article Entity Entity Generically Dependent Continuant 2025-05-06T08:39:00 RDF description of Experimental intra-abdominal hypertension attenuates the benefit of positive end-expiratory pressure in ventilating effusion-compressed lungs* - http://repository.healthpartners.com/individual/document-rn19704 Animal Studies 10.1097/CCM.0b013e318250aa40 <p>OBJECTIVE: To test the ability of positive end-expiratory pressure to offset the reduction of resting lung volume caused by intra abdominal hypertension, unilateral pleural effusion, and their combination. DESIGN: : Controlled application of intrapleural fluid, raised abdominal pressure and their combination before and after positive end-expiratory pressure in an anesthetized porcine model of controlled ventilation. SETTING: Large animal laboratory of a university-affiliated hospital. SUBJECTS: Fourteen deeply anesthetized swine (weight 30-35 kg). INTERVENTIONS: Unilateral pleural effusion instillation (13 mL/kg), intra-abdominal hypertension (15 mm Hg), and simultaneous pleural effusion/intra abdominal hypertension. MEASUREMENTS: Tidal compliance, end-expiratory lung aeration by gas dilution functional residual capacity, and quantitative analyses of computerized tomograms of the lungs at the extremes of the tidal cycle. MAIN RESULTS: Positive end-expiratory pressure of 10 cm H2O (positive end-expiratory pressure 10) increased mean functional residual capacity by 368 mL when pleural effusion was present and by 184 mL when intra-abdominal hypertension was present. When pleural effusion and intra-abdominal hypertension were simultaneously applied, positive end-expiratory pressure 10 failed to improve tidal compliance and increased functional residual capacity by only 77 mL, whereastidal recruitment during ventilation remained substantial. CONCLUSIONS: The presence of intra-abdominal hypertension negates most of the positive end-expiratory pressure 10 benefit in reversing pleural effusion-induced de-recruitment. Relief of intra-abdominal hypertension may be instrumental to the treatment of pleural effusion-associated lung restriction and cyclical tidal collapse and reopening.<p> document-rn19704 Respiratory Tract Diseases 12198 Respiration, Artificial 18976 7 public Critical Care Medicine Critical Care Radiography 2022-02-21T22:48:57.408-06:00 Experimental intra-abdominal hypertension attenuates the benefit of positive end-expiratory pressure in ventilating effusion-compressed lungs* 40