A wide-gap in the suture is?

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2018

Explanation

A fontanelle is a wide, membrane-filled space found at the junction where two or more cranial sutures meet on a fetal or infant skull.
These gaps allow the bony plates of the skull to overlap, a process called molding, which facilitates the head's passage through the birth canal.
Fontanelles also accommodate the rapid brain growth that occurs during infancy.

Option A: A diameter is a linear measurement between two points on the skull, such as the biparietal diameter, not a gap in the sutures.
Option B: Circumference is the measurement of the distance around the fetal head, used to monitor growth, but it is not a gap.
Option D: The inlet refers to the superior opening of the maternal pelvis, through which the fetus must pass. It is a maternal anatomical landmark, not part of the fetal skull.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the fetal skull as background academic context rather than a clinical decision trigger.
Assessing fontanelles is a critical nursing skill in neonatal care. A sunken or depressed fontanelle is a key sign of dehydration, while a bulging fontanelle can indicate increased intracranial pressure from conditions like meningitis or hydrocephalus.
During labor, palpating the fontanelles and sutures helps the nurse or midwife determine the position and degree of flexion of the fetal head.
What if? If a newborn's anterior fontanelle feels tense and bulging and does not close, it is a medical emergency requiring immediate escalation to a physician to rule out increased intracranial pressure.

How to Approach the Question

First, identify the key terms in the question: 'wide-gap' and 'suture'.
This is a factual recall question requiring knowledge of fetal skull anatomy.
Consider each option's definition in an obstetrical context.
Recall that 'Diameter' and 'Circumference' are measurements, not anatomical structures like a gap.
Recognize that the 'Inlet' is part of the maternal pelvis, not the fetal skull.
Conclude that 'Fontanelles' is the correct anatomical term for the gaps between the sutures.

Concept Tested & Keywords

Q88O5WIm9XgqSrq5X3RklZ

E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 53-66

E6 Obstetrics Williams p. 15-32

Practise the full RUHS, Jaipur, M.Sc Nursing Entrance Exam-2018

Attempt every question from this paper in a timed mock, then review the full solution for each one.