A pregnant woman in active labor presents with a cervical dilation of 7 cm, fetal station 0, and frequent late decelerations noted on cardiotocography. What is the most appropriate next step in management?

Appeared in: NORCERT 8 Mains-2025

Explanation

Late decelerations on a cardiotocograph (CTG) are a non-reassuring sign indicating uteroplacental insufficiency, where the fetus is not receiving adequate oxygen during contractions.
The immediate priority and first-line management is to perform intrauterine resuscitation to improve blood flow to the placenta and oxygen delivery to the fetus.
Key initial steps of intrauterine resuscitation include changing the mother's position (typically to the left lateral side to relieve vena cava compression) and administering supplemental oxygen via a non-rebreather mask.
These actions are aimed at correcting the underlying fetal hypoxia before more invasive measures are considered.

Option B: Preparing for an emergency cesarean section is a secondary intervention, not the immediate next step.
Option C: Administering oxytocin is contraindicated because it stimulates uterine contractions, which would further decrease blood flow to the placenta and worsen the existing fetal hypoxia.
Option D: Waiting is inappropriate and potentially harmful. Late decelerations are a sign of fetal distress that requires immediate intervention to prevent fetal acidosis, injury, or death.

Visual 1: Diagram - A cardiotocography (CTG) strip clearly showing late decelerations, where the nadir (lowest point) of the deceleration occurs after the peak of the uterine contraction, indicating a delay in fetal response.
Visual 2: Infographic - The 'LION' mnemonic for intrauterine resuscitation: L (Left lateral position), I (IV fluid bolus), O (Oxygen administration), N (Notify provider/No oxytocin).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Management of Non-reassuring Fetal Heart Rate Patterns (Late Decelerations) as background academic context rather than a clinical decision trigger.
A nurse's ability to promptly recognize late decelerations and initiate intrauterine resuscitation is a critical patient safety skill that can prevent fetal hypoxia, acidosis, and potential long-term neurological injury.
These interventions are performed immediately by the nurse while simultaneously notifying the primary healthcare provider for further evaluation and orders.
What if? - If the CTG showed variable decelerations instead, the priority would still be to change the maternal position, but the underlying cause would be suspected cord compression rather than placental insufficiency. Amnioinfusion might also be considered for severe, recurrent variable decelerations.

How to Approach the Question

First, identify the key clinical finding in the scenario: 'frequent late decelerations' on the cardiotocography.
Recall the pathophysiology: Late decelerations are caused by uteroplacental insufficiency, a form of fetal distress.
The question asks for the 'most appropriate next step,' which implies a priority action based on standard protocols.
Remember the standard of care for a non-reassuring fetal status: initiate intrauterine resuscitation measures first.
Evaluate the options based on this protocol. 'Administer oxygen and change maternal position' are core components of initial resuscitation.
Eliminate options that are clearly contraindicated (administering oxytocin), are secondary steps (preparing for C-section), or constitute inaction (waiting).

Concept Tested & Keywords

Concept Tested: Management of Non-reassuring Fetal Heart Rate Patterns (Late Decelerations)
Stem keywords: active labor, late decelerations, cardiotocography, cervical dilation, fetal station
Lead-in keywords: most appropriate next step
Clinical cues: Frequent late decelerations: This is the critical finding indicating fetal distress due to uteroplacental insufficiency.
Clinical cues: Active labor (7 cm dilation): Indicates the fetus is under the stress of regular contractions.

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