Weaning von der Beatmung

Das Weaning der Patienten stellt in der intensivmedizinischen Behandlung eine Herausforderung dar: Es gilt individualisiert die optimale Weaning-Strategie zu finden. In diesem Beitrag wird das Vorgehen mit Spontanatmungsversuch, korrekter Einordnung und Weaning-Protokoll erläutert. Dazu werden verschiedene Beatmungsmodi und Weaning-Strategien diskutiert. Zuletzt wird auf mögliche Ursachen eines Weaning-Versagens eingegangen, und wie diesen begegnet werden kann. Abtract Weaning from invasive mechanical ventilation is a central task in intensive care medicine and has gained increasing importance due to the rising number of patients requiring prolonged or even long-term ventilatory support. Early identification of patients at risk for difficult or prolonged weaning is crucial to improve outcomes and avoid long-term ventilation. Recent evidence highlights the growing role of predictive parameters such as ultrasound-based diaphragm assessment, mechanical power density, and biomarkers of respiratory effort. Emerging approaches, including automated ventilator-supported weaning algorithms and artificial intelligence-assisted analysis of diaphragm ultrasound combined with clinical data, show promise in reducing prolonged weaning failure. Successful weaning is a multifactorial and interprofessional process that should be initiated as early as possible once contraindications are excluded. Core elements include structured daily weaning assessments, spontaneous breathing trials (SBT), optimization of sedation strategies within the ABCDEF bundle, and individualized adaptation of ventilatory modes. Pressure support ventilation remains the most commonly used mode in Europe, while newer modalities such as neurally adjusted ventilatory assist and proportional assist ventilation offer potential benefits in selected patients but require expertise and further validation. Diaphragm dysfunction plays a key role in weaning failure. Controlled ventilation can rapidly induce diaphragmatic atrophy and myotrauma, emphasizing the importance of monitoring respiratory drive and effort, for instance via P0.1 measurements and diaphragm ultrasound. Noninvasive ventilation after extubation has demonstrated efficacy in reducing reintubation rates in high-risk patients when applied adequately. Tracheostomy is an important option in patients with anticipated prolonged weaning, facilitating airway management, reducing sedation needs, and enabling rehabilitation, although optimal timing must be individualized. Overall, successful weaning requires a structured, protocol-based, and interprofessional approach that integrates physiological monitoring, early mobilization, and targeted therapies to improve patient-centered outcomes and quality of life. Kernaussagen Bei vorhandener Weaning-Bereitschaft soll möglichst frühzeitig ein Spontanatmungsversuch durchgeführt werden [ 16 ]. Mehrere Spontanatmungsversuche können nötig sein, wenn der Patient beim 1. Versuch versagt. Der Rapid Shallow Breathing Index sollte in Kombination mit dem Spontanatmungsversuch zur Beurteilung der muskulären Erschöpfung gemessen werden [ 16 ]. Ursachen für Kontraindikationen einer Extubation sollten zeitnah erfasst und behoben werden. Zwischen den Spontanatmungsphasen im Weaning soll die Atemmuskulatur ausreichend entlastet werden, um sich regenerieren zu können [ 16 ].