標準アルゴリズムを超えて：難治性産後出血における診断、処置、鎮痛の課題

Postpartum hemorrhage (PPH) remains a leading cause of preventable maternal morbidity and mortality, with management often complicated by overlapping etiologies, delayed manifestations of hypovolemia, and procedural challenges related to analgesia availability. We report a case of recurrent PPH in a 24-year-old gravida 2, para 2 woman following spontaneous vaginal delivery without neuraxial anesthesia, in whom persistent bleeding refractory to uterotonic therapy was associated with discordant findings of a firm uterine fundus and a boggy lower uterine segment. Hemorrhage control was delayed by significant procedural pain during placement of an intrauterine vacuum-induced hemorrhage-control device, leading to continued bleeding and hemodynamic compromise with an estimated blood loss of 1,400-1,500 mL and activation of a massive transfusion protocol. Hemostasis was achieved with repeat device placement and blood product transfusion, followed by clinical stabilization. This case highlights the importance of recognizing localized uterine atony, the limitations of visual blood loss assessment, and the critical role of neuraxial anesthesia and analgesia planning in facilitating timely intrauterine interventions during acute obstetric hemorrhage.