Regarding uterine atony after delivery, treatment includes
**Core Concept**
Uterine atony is a condition where the uterus fails to contract after delivery, leading to excessive bleeding. This is a common cause of postpartum hemorrhage (PPH), a leading cause of maternal morbidity and mortality worldwide. The treatment of uterine atony involves pharmacological and non-pharmacological interventions to stimulate uterine contractions.
**Why the Correct Answer is Right**
The treatment of uterine atony typically involves the administration of uterotonic agents, such as oxytocin, which stimulates the uterine muscle to contract. Oxytocin acts on the myometrium, causing an increase in intracellular calcium, which triggers muscle contraction. This is mediated through oxytocin receptors, which are present on the surface of uterine smooth muscle cells.
**Why Each Wrong Option is Incorrect**
**Option A:** Other treatments for uterine atony include surgical interventions, such as uterine compression sutures or hysterectomy, but these are not the first line of treatment.
**Option B:** Uterine massage is a non-pharmacological intervention that can help stimulate uterine contractions, but it is not as effective as pharmacological agents like oxytocin.
**Option C:** Methergine (methylergonovine) is a uterotonic agent, but it is not the first line of treatment for uterine atony due to its potential side effects, such as hypertension and vasoconstriction.
**Clinical Pearl / High-Yield Fact**
In cases of uterine atony, early administration of uterotonic agents, such as oxytocin, is critical to prevent excessive bleeding and reduce the risk of maternal morbidity and mortality.
**Correct Answer:** C. Methergine (methylergonovine)