A nurse is reviewing the record of a client in the labor room and notes that the nurse midwife has documented that the fetus is at - 1 station. The nurse determines that the fetal presenting part is?

1. A

   1 inch below the coccyx

2. B

   1 inch below the iliac crest

3. C

   1 cm above the ischial spine

4. D

   1 fingerbreadth below the symphysis pubis

Appeared in: DHS 2018 shift 1st

Explanation

• Fetal station is a measurement of the descent of the fetal presenting part in relation to the maternal ischial spines.
• The ischial spines are designated as the '0' station landmark.
• A negative number indicates that the presenting part is located above the ischial spines.
• The measurement is in centimeters, so a '-1 station' means the presenting part is 1 cm above the ischial spines.

Why Other Options Were Wrong

• Option A: This option uses an incorrect anatomical landmark (coccyx) and an incorrect unit of measurement (inch). Fetal station is measured relative to the ischial spines in centimeters.
• Option B: This option uses an incorrect anatomical landmark (iliac crest), which is part of the false pelvis and is not used to measure fetal descent.
• Option D: This option uses an incorrect landmark (symphysis pubis) and an incorrect unit of measurement (fingerbreadth). Measuring in fingerbreadths relative to the symphysis pubis is a method for estimating fundal height, not fetal station.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Assessment of Fetal Station in Labor to guide bedside assessment, documentation, and the next nursing action.
• Accurate assessment of fetal station is a fundamental nursing skill in labor and delivery. It is crucial for monitoring the progress of labor.
• Failure of the fetus to descend (i.e., no change or a decrease in station) despite adequate contractions can be a sign of cephalopelvic disproportion (CPD), requiring further evaluation and possible intervention.
• Knowing the fetal station helps the healthcare team anticipate the timeline for delivery and prepare for the birth.

How to Approach the Question

• First, identify the key term in the question: '-1 station'.
• Recall the definition of fetal station. It is the relationship of the fetal presenting part to the mother's ischial spines.
• Remember the numbering system for fetal station: 0 station is at the level of the ischial spines, negative numbers are above the spines, and positive numbers are below the spines.
• Understand that the unit of measurement is centimeters (cm).
• Apply this knowledge: '-1 station' means the presenting part is 1 cm above the ischial spines.
• Evaluate each option. Eliminate options that use incorrect anatomical landmarks (coccyx, iliac crest, symphysis pubis) or incorrect units of measurement (inch, fingerbreadth).

Concept Tested & Keywords

• Concept Tested: Assessment of Fetal Station in Labor
• Stem keywords: labor room, fetus, -1 station, fetal presenting part
• Lead-in keywords: determines that
• Clinical cues: Documentation of '-1 station' is a specific clinical finding that requires precise interpretation.
• Negative lead-in flag: false

Question ID

QSA8fvoEygtYJ-395L9TPL

Copy ID

Reference Book

E6 Obstetrics Williams p. 24-43