The coordination between the fundal contraction and cervical dilatation is called

KGMU 2024

Obstetrics & Gynaecology

Easy

Appeared in: KGMU 2024

Explanation

Uterine polarity refers to the neuromuscular harmony and coordination between the upper (fundal) and lower (cervical) segments of the uterus during labor.
During a normal labor contraction, the upper segment (fundus) actively contracts and retracts to push the fetus downward.
Simultaneously, the lower uterine segment and the cervix passively relax, thin out (efface), and open (dilate) to allow the passage of the fetus.
This synchronized and opposing action between the two poles of the uterus is essential for the normal progression of labor.

Option A: Softening of the uterus (e.g., Hegar's sign) is a physiological change and a probable sign of early pregnancy due to hormonal influences. It does not describe the functional coordination of muscle contractions during labor.
Option B: Hypertrophy is the increase in the size of individual uterine muscle cells (myocytes). This is a process of growth that occurs throughout pregnancy to accommodate the fetus, not the coordinated action of labor.
Option C: Increased vascularity refers to the enhanced blood supply to the uterus, which is necessary to support the growing fetus. It causes physical signs like Chadwick's sign (bluish discoloration of the cervix) but is not related to the mechanical coordination of labor.

Visual 1: Diagram - Illustrating uterine polarity. The diagram should show a sagittal view of the uterus during labor, highlighting the thick, muscular, contracting upper segment and the thin, stretched, dilating lower segment and cervix, with arrows indicating the downward force from the fundus and the opening of the cervix.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiology of Labor as background academic context rather than a clinical decision trigger.
Understanding uterine polarity is crucial for nurses to assess the progress of labor. Normal polarity results in efficient cervical dilatation and fetal descent.
Abnormal polarity, known as incoordinate uterine action, is a cause of dystocia (difficult labor). This can lead to prolonged labor, fetal distress, and maternal exhaustion.
Incoordinate uterine action may require nursing interventions such as providing comfort measures, encouraging position changes, and preparing for medical interventions like oxytocin augmentation or cesarean section.

How to Approach the Question

This is a factual recall question testing knowledge of obstetric terminology.
Identify the key concepts in the question: 'coordination', 'fundal contraction', and 'cervical dilatation'. These terms describe a dynamic, functional process.
Analyze the options in the context of labor. 'Softening', 'hypertrophy', and 'increased vascularity' are all physiological changes that occur during pregnancy but do not describe the coordinated action of labor itself.
Recall the specific term for the neuromuscular harmony between the upper and lower parts of the uterus during labor.
Recognize that 'polarity' describes this relationship, where the upper pole actively contracts and the lower pole passively dilates.
Select 'Polarity of uterus' as the term that specifically defines this coordinated process.

Concept Tested & Keywords

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