Blutvolumenänderungen und Oxygenation bei Wehentätigkeit - eine laserspektroskopische Analyse1

Background: Hemodynamic patterns and the distribution of blood volume are influenced by the onset of labour. This study evaluates patterns of oxygenation and changes of blood volume after the induction of contractions. Methods: A prototyp NIR-laser spectrometer was applied in 28 cases. Results: We found a rise of blood volume and oxygen saturation (HbO(2)) during the peak of contractions. Cerebral tissue oxygenation was monitored by registration of relative changes of cytochrome-aa(3). No significant change of tissue oxygenation was detected during variable volume load. Discussion: This implicates compliance of the redox state during labour.