Rate of cervical dilation during active phase of labor in primigravidae is

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2024

Obstetrics & Gynecology

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2024

Explanation

1 cm/hr.
During the active phase of labor, a primigravida (a woman pregnant for the first time) is expected to have a minimum cervical dilation rate of about 1.2 cm per hour, which is clinically standardized to 1 cm/hr.
This rate is a critical benchmark used in labor management to assess normal progression.
The alert line on a World Health Organization (WHO) partograph, a tool used to monitor labor, is plotted at a rate of 1 cm/hr to help identify abnormally slow labor.

Option A: A rate of 0.35 cm/hr is abnormally slow for the active phase of labor and would be considered a labor arrest disorder, indicating a need for medical intervention.
Option B: A rate of 0.5 cm/hr is too slow for the active phase. This might be observed during the much slower latent phase of labor but signifies a protraction disorder if it occurs during the active phase.
Option D: This is the expected minimum rate of cervical dilation for a multigravida (a woman who has previously given birth), who typically progresses faster than a primigravida.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain The concept tested is the normal rate of cervical dilation during the active phase of the first stage of labor in a primigravid woman as background academic context rather than a clinical decision trigger.
Monitoring the rate of cervical dilation is a fundamental nursing responsibility in the labor and delivery unit.
Failure to progress at the expected rate (at least 1 cm/hr for a primigravida) can indicate cephalopelvic disproportion (CPD) or uterine dysfunction, which increases the risk for maternal exhaustion, infection, and fetal distress.
Nurses use the partograph to visually track labor progress. If a patient's dilation plot crosses the 'alert line' (1 cm/hr), it signals the need for reassessment and potential intervention, such as amniotomy or oxytocin augmentation, to prevent adverse outcomes.

How to Approach the Question

First, identify the key elements of the question: the patient is a 'primigravida' (first pregnancy), and the stage of labor is the 'active phase'.
Recall the standard parameters for labor progression. The active phase is characterized by rapid cervical dilation.
Differentiate the expected rates for a primigravida versus a multigravida. Remember that first labors are typically slower.
Recall the standard minimum dilation rate for a primigravida in the active phase, which is 1 cm per hour.
Compare this value to the given options. 1 cm/hr is a direct match.
Eliminate the other options: 0.35 and 0.5 cm/hr are too slow and represent abnormal labor. 1.5 cm/hr is the rate for a multigravida.

Concept Tested & Keywords

Concept Tested: The concept tested is the normal rate of cervical dilation during the active phase of the first stage of labor in a primigravid woman.
Stem keywords: Rate, cervical dilation, active phase, labor, primigravidae
Lead-in keywords: BEST, MOST RELEVANT CLUE