A transverse groove formed between the upper and lower uterine during obstructed labour is called:

RIMS Nursing Officer - 2022

Obstetrics & Gynaecology

Easy

Appeared in: RIMS Nursing Officer - 2022

Explanation

Bandl's ring is the specific medical term for the pathological retraction ring that forms during obstructed labor.
As seen in the provided image, it manifests as a distinct transverse groove at the junction of the actively contracting upper uterine segment and the dangerously thinned, passive lower uterine segment.
This ring is a late and ominous sign of severe mechanical obstruction, indicating that the uterus is under extreme strain and at high risk of rupturing.
Its identification is a critical assessment finding that signals an obstetric emergency requiring immediate intervention, typically an emergency Cesarean section.

Option B: A constriction ring is a localized spasm of the uterine muscle, not a result of the entire upper segment retracting against an obstruction. It can occur at any level of the uterus and is a feature of incoordinate uterine action.
Option C: The physiological retraction ring is a normal boundary that forms between the upper and lower uterine segments during the course of any normal labor. It is not pathological and is not visible or palpable externally.
Option D: An amniotic ring is related to amniotic band syndrome, a congenital condition where strands of the amniotic sac detach and entangle parts of the fetus. It has no relation to the uterine muscle or the dynamics of obstructed labor.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of the signs of obstructed labor, specifically the pathological retraction ring as background academic context rather than a clinical decision trigger.
The ability to recognize Bandl's ring is a critical nursing skill in labor and delivery. It is a red flag for an impending uterine rupture, a life-threatening complication for both mother and fetus.
Upon identifying Bandl's ring, the nurse's priority is to alert the obstetric team immediately, stop any oxytocin infusion, and prepare the patient for an emergency Cesarean section.
Continuous fetal monitoring is crucial, as the fetus is under extreme stress and at high risk for hypoxia and death.

How to Approach the Question

First, analyze the keywords in the question: 'transverse groove,' 'upper and lower uterine,' and 'obstructed labour.' These point to a specific pathological sign.
Next, examine the provided image. The diagram clearly shows a pregnant uterus with a distinct indentation or groove separating a thick upper part from a stretched, thin lower part, visually representing the condition described.
Evaluate the options based on your knowledge of labor complications. 'Bandl's Ring' is the classic term for the pathological retraction ring seen in obstructed labor.
Differentiate the correct answer from the distractors. A 'Physiological Ring' is normal and not visible. A 'Constriction Ring' is a localized spasm. An 'Amniotic Ring' is a congenital issue.
Conclude that 'Bandle's Ring' is the only term that accurately describes the pathological groove formed due to the mechanical forces of obstructed labor.

Concept Tested & Keywords

Concept Tested: Identification of the signs of obstructed labor, specifically the pathological retraction ring.
Stem keywords: transverse groove, upper uterine, lower uterine, obstructed labour
Lead-in keywords: is called
Clinical cues: The image visually confirms the formation of a pathological ring between a thickened upper uterine segment and a thinned lower segment, characteristic of obstructed labor.

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E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 54-68

E6 Obstetrics Williams p. 9-26