Uterine Atony
Pronunciation: AY-tuh-nee
Failure of the uterine muscles to contract effectively after delivery, leading to postpartum hemorrhage and requiring immediate medical intervention.
Full Definition
Uterine atony is the most common cause of postpartum hemorrhage, characterized by the failure of uterine muscle fibers to contract adequately after delivery of the placenta. This condition prevents compression of the spiral arteries and placental bed vessels, resulting in continued bleeding that can become life-threatening. Risk factors include prolonged labor, multiple gestations, polyhydramnios, and certain anesthetic agents. From an anesthetic perspective, volatile anesthetic agents and high-dose neuraxial opioids can contribute to uterine atony. Treatment involves uterotonic medications such as oxytocin, methylergonovine, and prostaglandins, along with supportive care and possible surgical intervention if medical management fails.
Usage
Usage note: Distinguish from other causes of postpartum hemorrhage in documentation.
In Context
- "Uterine atony was diagnosed when the fundus remained soft and boggy despite oxytocin administration." — Postpartum complication note
- "The anesthesiologist reduced volatile agent concentration to minimize contribution to uterine atony." — Intraoperative anesthetic note