Mismanagement of which stage of labor causes inversion of uterus?

AIIMS Raipur lecturer 2021

Obstetrics & Gynaecology

Easy

Appeared in: AIIMS Raipur lecturer 2021

Explanation

Uterine inversion is a critical obstetric emergency where the fundus of the uterus collapses into the endometrial cavity, turning the uterus partially or completely inside out.
This event is almost exclusively associated with the third stage of labor, the period from the birth of the baby until the expulsion of the placenta.
Mismanagement during this stage, such as applying excessive traction on the umbilical cord before the placenta has separated or using inappropriate fundal pressure on a relaxed uterus, is the most common cause.
The third stage is the window of vulnerability for this complication because the placenta is separating, and improper maneuvers can pull the uterine wall down with it.

Option A: The first stage of labor involves cervical dilation and effacement. The placenta is still firmly attached, and the maneuvers that cause inversion (cord traction, fundal pressure for placental delivery) are not performed during this stage.
Option B: The fourth stage is the immediate postpartum recovery period, beginning after the placenta has been delivered. While the risk of postpartum hemorrhage from uterine atony is high, uterine inversion has already occurred or been prevented by this point.
Option C: The second stage of labor is the period from full cervical dilation to the birth of the baby. The focus is on fetal descent and expulsion. Uterine inversion is not a risk during this stage.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Complications of the Third Stage of Labor as background academic context rather than a clinical decision trigger.
Nurses and midwives are pivotal in preventing uterine inversion by adhering to the principles of active management of the third stage of labor (AMTSL). This includes confirming signs of placental separation before applying controlled cord traction.
Immediate recognition is critical for patient survival. Key signs include sudden, severe abdominal pain, a palpable mass in the vagina or at the introitus, massive hemorrhage, and profound neurogenic shock, which may be out of proportion to the visible blood loss.
Nursing interventions include calling for immediate help, establishing large-bore IV access for fluid and blood resuscitation, and preparing for manual replacement of the uterus, which may require tocolytics or general anesthesia.

How to Approach the Question

First, identify the key terms in the question: "mismanagement," "stage of labor," and "inversion of uterus."
Recall the definition and primary events of each of the four stages of labor.
Think about the mechanism of uterine inversion: the uterus turning inside out. This action is physically linked to the delivery of the placenta.
The placenta is delivered during the third stage of labor.
Connect the mismanagement (e.g., pulling the cord too hard) to the event (placental delivery). This confirms that the third stage is the correct answer.
Eliminate the other stages by considering their primary events: cervical dilation (first), baby delivery (second), and recovery (fourth), none of which involve the specific actions that lead to inversion.

Concept Tested & Keywords

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E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 1-5

E6 Obstetrics Williams p. 52-72