A grand multipara following a full term normal delivery went into shock. On examination the uterus was found to be flabby and became hard on massaging. What is the most probable diagnosis?
**Core Concept**
Uterine atony refers to the failure of the uterus to contract effectively after delivery, leading to excessive bleeding and shock. This condition is more common in grand multiparas due to uterine fatigue and potential damage from previous pregnancies.
**Why the Correct Answer is Right**
The correct answer is related to the clinical presentation of uterine atony. The flabby uterus that becomes hard on massaging is a classic sign of this condition. The uterus should contract and become firm after delivery, but in cases of atony, it remains soft and flabby due to inadequate contraction of the uterine muscles. This leads to excessive bleeding and potentially life-threatening shock.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the clinical presentation described in the question. Uterine rupture would typically present with severe abdominal pain and possibly vaginal bleeding, but the uterus would not be flabby.
* **Option B:** Hypovolemic shock can occur due to blood loss, but it does not explain the flabby uterus or the response to massaging.
* **Option C:** This option is not directly related to the clinical scenario. A placental abruption would typically present with severe abdominal pain and vaginal bleeding, and the uterus would not be flabby.
* **Option D:** This option is not relevant to the clinical presentation. A uterine inversion would typically present with a soft, flabby uterus, but the key feature is the inversion of the uterus, not the response to massaging.
**Clinical Pearl / High-Yield Fact**
Uterine atony can be prevented or treated with uterotonic agents such as oxytocin, which stimulate uterine contractions and help control bleeding.
**Correct Answer:** C. Uterine atony.