Which of the following terms refers to the state where the uterine muscle fibres remain shortened after a con… - BTSC Staff Nurse 31 July-2025

BTSC Staff Nurse 31 July-2025

Obstetrics & Gynaecology

Easy

Appeared in: BTSC Staff Nurse 31 July-2025

Explanation

Uterine retraction is the correct term for the physiological phenomenon where uterine muscle fibers become permanently shortened after a contraction during labor.
Unlike a typical contraction where muscle fibers return to their original length upon relaxation, retraction ensures that the gains made in expelling the fetus are not lost between contractions.
This process is essential for the progressive thickening of the upper uterine segment and the thinning of the lower segment, which drives fetal descent and cervical dilation.
Post-delivery, retraction plays a critical role in hemostasis by constricting blood vessels at the placental site, thereby preventing postpartum hemorrhage.

Option A: Uterine effacement refers to the thinning and shortening of the cervix, not the permanent shortening of the uterine muscle fibers themselves.
Option C: Uterine dilation is the process of the cervical opening widening, measured in centimeters, to allow the passage of the fetus.
Option D: Uterine ballottement is a diagnostic technique used during a pelvic exam to detect a floating fetus in the amniotic fluid; it is not a physiological process of the uterine muscle.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiology of labor and uterine muscle function as background academic context rather than a clinical decision trigger.
A nurse's primary responsibility in the immediate postpartum period is to assess the uterine fundus for firmness. A firm, well-contracted uterus indicates effective retraction and minimizes the risk of postpartum hemorrhage (PPH).
If the uterus feels soft or 'boggy,' it signifies uterine atony (failure of retraction), which is the leading cause of PPH. The first nursing intervention is to massage the fundus to stimulate contraction and retraction.
What if the uterus fails to retract after delivery? This condition is called uterine atony. It is a medical emergency that leads to severe postpartum hemorrhage. Immediate interventions include fundal massage, administration of uterotonic drugs (like oxytocin, methergine), and potentially manual exploration of the uterus or surgical procedures to control the bleeding.

How to Approach the Question

First, identify the core concept in the question stem: the state where uterine muscle fibers 'remain shortened after a contraction'.
This is a direct recall question testing your knowledge of obstetric terminology.
Differentiate this from other related but distinct processes of labor.
Recall the definition of 'uterine retraction' as the permanent shortening of muscle fibers.
Contrast this with 'effacement' (cervical thinning), 'dilation' (cervical opening), and 'ballottement' (an examination technique).
Select the option that precisely matches the physiological description provided in the question.

Concept Tested & Keywords

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E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 6-11

E6 Obstetrics Williams p. 9-25