Sl ; MMAKV. Wo hypolhcsi/ecl that a hing recruitment m;mcu\cr lias positive influence on hemodynamic Parameters in nicchanical ventilated patienls. \Yo mvcstigated paticnts of the Intensive Care Unit with hoalthy lungs Hut posl operative atelectasis ander nicchanical Ventilation. ECG and conlinuous blood prcssure were recorded during 30min before and after thc recruitment maneuver, respectively. ßaroreflex scnsiiivity and number of baroreflex fluctuations were ealculated using the sequence method. Furthermore, we computed linear and non-linear measures of heart rate and blood pressure variability. \Vhereas baroreflex sensitivity remained unchanged, the number of baroreflex fluctuations was significantly rcduced after the recruitment maneuver. Blood pressure ampliuide was increased and complexity (non-linear Parameter) of blood pressure time series was decreased. Number of baroreflex activations after the recruitment maneuver is comparable with healthy spontaneous breathing subjects. The improved oxygenation increases contractility of the heart and blood pressure adoption is less frequently necessary. This study shows that a hing recruitment maneuver has a sigmficant positive influence on patients hemodynamics.EINLEITUNG