Risk factors of massive blood transfusion (MTP) in cesarean hysterectomy for placenta accreta spectrum

•85% of patients undergoing hysterectomy for PAS will be transfused at least 1 unit of blood.•No independent risk factors for transfusion of 1–4 units of blood was identified.•Pre-operative risk factors for blood transfusion > 10 units are: vaginal bleeding, preterm delivery 4 units or > 10 units of red blood cells/whole blood transfused over 24 h. Antenatal, operative and post-operative outcomes were obtained from electronic medical records of these cases. During the study time frame, 142 cases were managed by our PAS team and met all criteria. 85 % (120/142) of patients were transfused at least 1 unit of blood, 64 patients (45 %) received 0–3 units of blood, 50 patients (35 %) received 4–9 units of blood and 28 patients (19.7 %) were transfused > 10 units of blood. Pre-delivery vaginal bleeding, preterm labor and delivery