Bandl’s ring is associated with :
**Core Concept**
Bandl's ring is a characteristic histopathological feature observed in the uterus during a cesarean section in cases of obstructed labor. It represents a zone of avascular necrosis in the lower uterine segment, leading to a characteristic ring-like appearance.
**Why the Correct Answer is Right**
The formation of Bandl's ring is due to the prolonged compression of the lower uterine segment, leading to ischemia and subsequent necrosis. This occurs when the uterus is unable to contract effectively, causing a blockage of blood flow. The lower uterine segment, being less muscular and with a smaller blood supply, is more susceptible to ischemic damage. The resulting Bandl's ring is a visible sign of this pathologic process.
**Why Each Wrong Option is Incorrect**
**Option A:** This choice is incorrect as Bandl's ring is not associated with placenta previa, which is a condition where the placenta covers the cervical os.
**Option B:** This choice is incorrect as Bandl's ring is not a feature of uterine atony, which is a condition where the uterus fails to contract effectively after delivery.
**Option C:** This choice is incorrect as Bandl's ring is not a characteristic feature of uterine fibroids.
**Clinical Pearl / High-Yield Fact**
Bandl's ring is a critical sign that indicates obstructed labor, which can lead to severe complications for both the mother and the fetus. Prompt recognition and intervention are essential to prevent further damage.
**Correct Answer:** D. Obstructed labor.