A nurse assesses the frequency of a client's contractions by timing them from the beginning of a contraction:

Appeared in: BHU NO-2019

Explanation

The frequency of uterine contractions is correctly measured from the beginning of one contraction to the beginning of the next.
This measurement indicates how often contractions are occurring, which is a key indicator of labor progression.
A normal frequency in active labor is typically 3 to 5 contractions in a 10-minute period.
This method provides a standardized way to communicate the labor pattern among healthcare providers.

Option A: Timing from the beginning of a contraction until the uterus completely relaxes measures the 'duration' of that single contraction, not the frequency.
Option B: Timing from the beginning of a contraction until it starts to relax only captures the increment (build-up) and acme (peak) phases. It is an incomplete and non-standard measurement.
Option C: Timing from the beginning of one contraction to the end of a second contraction is not a standard or clinically meaningful measurement in labor monitoring.

Clinical Relevance

Nursing practice connection: Use the key finding related to Assessment of Uterine Contraction Frequency to guide bedside assessment, documentation, and the next nursing action.
Accurate assessment of contraction frequency is a fundamental nursing skill in obstetrics to monitor labor progression and ensure fetal safety.
Monitoring frequency helps identify abnormal patterns like tachysystole (more than 5 contractions in 10 minutes), which can reduce placental blood flow and lead to fetal hypoxia, requiring immediate intervention.
The interval, or resting period between contractions, is critical for fetal oxygenation. Inadequate rest time can compromise the fetus.

How to Approach the Question

Identify the key term in the question: 'frequency' of contractions.
Recall the precise clinical definitions for the three main parameters of uterine activity: frequency, duration, and interval.
Understand that 'frequency' measures how often an event occurs, which in this context means from the start of one event to the start of the next identical event.
Evaluate each option against this definition. Option A describes 'duration'. Option B is an incomplete measurement. Option C is not a standard measurement.
Conclude that Option D, 'To the beginning of the next contraction,' correctly defines the measurement of frequency.

Concept Tested & Keywords

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E6 Obstetrics Williams p. 55-74

Practise the full BHU NO-2019

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