Zusammenfassung
Ein lungenschonendes maschinelles Beatmungsregime mit Drucklimitierung, kleinen Tidalvolumina (6–8 ml/kg ideales KG), adäquatem positiven endexspiratorischen Druck („positive end-expiratory pressure”, PEEP) und frühen Rekrutierungsmanövern ist von zentraler Bedeutung für die erfolgreiche Behandlung des akuten Lungenversagens („acute lung injury“, ALI). Bei hämodynamisch stabilen Patienten mit ALI hat sich darüber hinaus eine restriktive Volumengabe als vorteilhaft erwiesen. Ziele beider Maßnahmen sind die Aufrechterhaltung einer ausreichenden Oxygenierung bei gleichzeitiger Minimierung der Beatmungsspitzendrücke sowie die Reduktion pulmonaler Atelektasen und Ödeme. Die hämodynamischen Nebenwirkungen bestehen hauptsächlich in einem Abfall des Herzzeitvolumens (HZV) und konsekutiv des arteriellen Blutdrucks. Das Risiko einer Organminderperfusion scheint jedoch zugunsten des möglichen Therapieerfolgs gerechtfertigt, der eine Reduktion von hypoxischer pulmonaler Vasokonstriktion und Hyperkapnie beinhaltet. Die damit verbundene Verringerung des pulmonalarteriellen Druckes trägt zur Entlastung des rechten Ventrikels und zur Stabilisierung der Hämodynamik bei.
Abstract
Basic therapy of acute lung injury (ALI) covers a pressure-limited lung protective mechanical ventilation with low tidal volumes (6–8 ml/kg ideal body weight), adequate positive end-expiratory pressure (PEEP) combined with early recruitment maneuvers and a restrictive fluid management (in hypoproteinemic patients preferably with albumin and diuretics). These measures aim at providing sufficient oxygenation while simultaneously minimizing airway pressure, atelectasis and edema formation. The main hemodynamic effects are a decrease in cardiac output and in systemic arterial pressure potentially reducing organ perfusion. However, successful therapy reduces hypoxic pulmonary vasoconstriction and hypercapnia, thus lowering pulmonary artery pressure, unloading the right ventricle, and stabilising hemodynamics.
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Bercker, S., Busch, T., Donaubauer, B. et al. Beatmung und Volumentherapie beim akuten Lungenversagen. Anaesthesist 58, 410–414 (2009). https://doi.org/10.1007/s00101-009-1525-0
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DOI: https://doi.org/10.1007/s00101-009-1525-0