External Validation of a Multivariable Prediction Model for Placenta Accreta Spectrum

(Anesth Analg. 137(3):537–547) Placenta accreta spectrum (PAS) encompasses various forms of abnormal placental attachment and uterine invasion. PAS is a leading cause of severe postpartum hemorrhage and often leads to an emergency hysterectomy. Managing PAS and its associated complications, such as preterm birth, maternal morbidity, and neonatal intensive care unit admissions, is best achieved in tertiary-level hospitals equipped with specialized multidisciplinary care. To ensure the highest quality of care, proactive planning is essential. This involves identifying risk factors associated with PAS, facilitating rapid transfers to appropriate delivery facilities, efficient resource allocation, and minimizing the occurrence of life-threatening postpartum hemorrhage and its associated complications.