A prospective study of post-cesarean delivery hypoxia after spinal anesthesia with intrathecal morphine 150 μg

Mild hypoxemia occurred frequently in women receiving intrathecal morphine 150 μg for post-cesarean analgesia. Desaturations were observed most frequently 4-8 hours after administration of intrathecal morphine. Obesity and a positive Berlin Questionnaire were risk factors for hypoxemic events.