The study investigates the influence of three types of ventilation mode by using Bi-Level positive airway pressure (pinsp 20 mbar, PEEP 5, AF 10/min) with two different types of ventilators ( Medumat vs. MeduVENT ), Continuous positive airway pressure (PEEP 5, AF 10/min, ASB 10) and Chest Compression Synchronized Ventilation (pInsp = 30 vs. 60 mbar; respiratory rate = chest compression rate, PEEP 5) with regard to achieving a sufficient tidal volume and the tightness of various supraglottic airway devices (laryngeal mask, i-Gel-laryngeal mask, laryngeal tube) and endotracheal intubation.
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gained tidalvolume with different airway devices in BIPAP
Timeframe: After beginning of ventilation up to 4 minutes each device
gained ventilation volume with different airway devices in CPAP-ASB
Timeframe: After beginning of ventilation up to 4 minutes each device
occurred ventilation pressure with different airway devices in CCSV
Timeframe: After beginning of ventilation up to 4 minutes each device