A nurse is assessing a 28-week gestation preterm infant who was born 2 hours ago. Which assessment finding would be the most concerning indicator of respiratory distress syndrome (RDS)?
1Respiratory rate of 55 breaths per minute with occasional irregular breathing patterns
2Mild peripheral cyanosis of the hands and feet with pink central coloration
3Soft, intermittent expiratory grunting heard during quiet breathing
4Severe intercostal and substernal retractions with nasal flaring during inspiration✓ 정답
해설
Severe intercostal and substernal retractions with nasal flaring are the most concerning signs of RDS, indicating significant respiratory distress and increased work of breathing due to surfactant deficiency. Other options are less severe or normal variants.
Core Nursing ExplanationKey Concept Analysis: This question assesses the ability to identify the most severe clinical sign of Respiratory Distress Syndrome (RDS) in a preterm infant. RDS, also known as Hyaline Membrane Disease (HMD), is primarily caused by a deficiency of pulmonary surfactant. Surfactant reduces surface tension in the alveoli, preventing their collapse at the end of expiration. Without it, the lungs become stiff (decreased compliance), leading to atelectasis, hypoxia, and increased work of breathing. The assessment findings listed represent a spectrum from normal preterm variations to signs of severe respiratory failure.
Answer Rationale: Key Point! Option ④, "Severe intercostal and substernal retractions with nasal flaring during inspiration," is the most concerning finding. This indicates the infant is using accessory muscles to generate enough negative pressure to open stiff, surfactant-deficient lungs. This represents significant increased work of breathing and is a hallmark of moderate to severe RDS. Nasal flaring is an attempt to decrease airway resistance. Together, these are late signs of distress that require immediate intervention, such as supplemental oxygen, CPAP (Continuous Positive Airway Pressure), or mechanical ventilation.
Distractor Analysis:
Option ① (Respiratory rate of 55 breaths per minute with occasional irregular breathing patterns): A respiratory rate of 55 breaths/min is within the normal range for a newborn (30-60 breaths/min). Irregular breathing patterns (periodic breathing) are common in preterm infants due to immature respiratory control centers in the brain. This is a less concerning finding.
Option ② (Mild peripheral cyanosis of the hands and feet with pink central coloration): This describes acrocyanosis, a normal finding in newborns for the first 24-48 hours due to peripheral vasoconstriction and transitional circulation. The key is the "pink central coloration," which indicates adequate central oxygenation. This is not a sign of RDS.
Option ③ (Soft, intermittent expiratory grunting heard during quiet breathing): Watch out for confusion! Expiratory grunting is a classic early sign of RDS. It is a compensatory mechanism where the infant closes the glottis at the end of expiration to create positive end-expiratory pressure (PEEP), which helps keep alveoli open. However, the question asks for the most concerning indicator. "Soft" and "intermittent" grunting suggests a milder presentation. Severe, persistent grunting would be very concerning, but the description here is less severe than the profound retractions and flaring in option ④.
Related Concepts: The progression of RDS signs often follows a pattern: tachypnea > grunting > retractions > nasal flaring > cyanosis > apnea/bradycardia. Nursing priorities include maintaining a patent airway, ensuring adequate oxygenation and ventilation, minimizing energy expenditure, and preparing for potential surfactant administration.
Concept Summary
Concept
Description
Clinical Significance
Respiratory Distress Syndrome (RDS)
Surfactant deficiency leading to alveolar collapse, decreased lung compliance, and hypoxia.
Major cause of morbidity in preterm infants < 34 weeks gestation.
Surfactant
Lipoprotein produced by Type II alveolar cells that reduces surface tension.
Production begins ~24 weeks, matures by ~35 weeks. Deficiency causes RDS.
Retractions
Visible sinking in of soft tissues between/below ribs (intercostal/substernal) during inspiration.
Indicates increased work of breathing to overcome stiff lungs. Severity correlates with distress level.
Grunting
Expiratory sound from partial glottic closure.
Early compensatory sign to maintain alveolar volume (auto-PEEP).
Nasal Flaring
Widening of nostrils during inspiration.
Attempt to decrease airway resistance and increase airflow.
Side-by-Side Comparison!
Assessment Finding
Typical in RDS?
Severity / Notes
Commonly Confused With
Severe Retractions + Flaring
Yes
Key Point!Most concerning sign of increased work of breathing and potential respiratory failure.
Mild retractions seen in transient tachypnea of the newborn (TTN).
Expiratory Grunting
Yes
Classic early sign. "Soft, intermittent" may be less severe; persistent/audible without stethoscope is serious.
Moaning or crying sounds.
Tachypnea (RR >60)
Yes (Early)
Common initial sign. RR of 55 is borderline/normal for a newborn.
Normal newborn respiratory rate (30-60).
Central Cyanosis
Yes (Late)
Sign of severe hypoxia. Requires immediate O2 therapy.
Acrocyanosis (normal peripheral cyanosis).
Apnea / Bradycardia
Yes (Late)
Sign of impending respiratory arrest. Critical finding.
Periodic breathing (normal brief pauses in preterms).
Anatomy, Physiology & Pharmacology Points
Physiology: Surfactant (composed of phospholipids like dipalmitoylphosphatidylcholine) is produced by Type II pneumocytes. Its deficiency increases the pressure needed to inflate alveoli (Laplace's law: Pressure = 2 x Tension / Radius), leading to atelectasis and ventilation-perfusion (V/Q) mismatch.
Pharmacology: Exogenous surfactant (e.g., beractant, poractant alfa) is a key treatment. It is administered via endotracheal tube, often requiring brief manual ventilation and repositioning to distribute it throughout the lungs.
Prevention: Antenatal corticosteroids (betamethasone) given to the mother before preterm delivery accelerate fetal lung maturation and surfactant production.
Memory Tips
RDS Signs Mnemonic: "GRUNT" – Grunting, Retractions, Unnerved (tachypnea), Nasal flaring, Tired (cyanosis/apnea). The most severe is when you see the baby "working hard" – severe retractions + flaring.
Think of a straw: Trying to breathe with stiff lungs is like trying to drink a thick milkshake through a thin straw – your cheeks suck in (retractions), and you flare your nostrils trying to get more air.
High-Frequency NCLEX Topics
NCLEX loves testing on prioritization and recognizing urgent vs. non-urgent findings. You must distinguish normal newborn variations (acrocyanosis, periodic breathing) from pathological signs. Questions often present a list of symptoms and ask for the "most concerning," "priority assessment," or "requires immediate intervention" finding. RDS is a classic scenario for this.
Watch Out for Question Variations!
Shift from Assessment to Intervention: "The nurse observes severe intercostal retractions in a preterm infant. Which action should the nurse take first?" (Answer: Ensure a patent airway and administer oxygen as prescribed).
Shift to Pharmacology: "A preterm infant with RDS is scheduled for surfactant therapy. Which nursing action is essential prior to administration?" (Answer: Ensure correct endotracheal tube placement via chest X-ray and auscultation).
Shift to Patient Education: "The parent of a preterm infant asks why their baby needs a breathing machine. The nurse's response is based on the knowledge that RDS is primarily caused by..." (Answer: Lack of a substance that keeps the air sacs open).
Nursing Clinical Practice GuideClinical Scenario: You are the nurse in the Neonatal Intensive Care Unit (NICU). Baby Boy Garcia, born at 28 weeks gestation, is in a radiant warmer. He was initially vigorous but over the past hour, you notice his breathing has become more labored.
Nursing Intervention Strategy:
Assessment:
Airway & Breathing: Use the Silverman-Anderson Retraction Score or similar tool to objectively grade retractions (score 0-10, higher = worse). Auscultate breath sounds for equality and adventitious sounds (crackles may indicate fluid; diminished sounds indicate atelectasis).
Vital Signs & Oxygenation: Monitor respiratory rate, heart rate, and continuous pulse oximetry (Goal SpO2: 90-95% for preterm infants to avoid retinopathy of prematurity). An increasing FiO2 requirement to maintain SpO2 is a red flag.
Color & Behavior: Assess for central cyanosis (lips, tongue, trunk) versus acrocyanosis. Note lethargy, poor feeding, or hypotonia, which indicate worsening hypoxia.
Immediate Actions:
Position the infant with the head slightly elevated to maximize chest expansion.
Administer supplemental oxygen via hood or nasal cannula as ordered to maintain target SpO2.
Minimize handling and cluster care to reduce energy expenditure and oxygen consumption.
Alert the neonatal nurse practitioner or physician immediately if retractions worsen, grunting becomes persistent, or oxygen requirements increase.
Ongoing Care & Monitoring:
Prepare for potential transfer to CPAP or mechanical ventilation.
Assist with procedures such as arterial blood gas (ABG) draws to assess for respiratory acidosis (low pH, high PaCO2).
If surfactant is administered, assist with the procedure and closely monitor for rapid changes in oxygenation and compliance immediately after dosing.
Patient Safety and Precautions:
Thermoregulation: Preterm infants are prone to heat loss. Perform assessments and procedures under a radiant warmer or in an isolette to maintain neutral thermal environment and prevent cold stress, which increases oxygen demand.
Infection Control: Meticulous hand hygiene before and after contact. RDS infants are at high risk for sepsis, which can mimic or exacerbate respiratory distress.
Oxygen Toxicity: Use the lowest effective FiO2 to prevent retinopathy of prematurity (ROP) and bronchopulmonary dysplasia (BPD).
Pre-procedure: Verify order and correct infant. Ensure endotracheal tube (ETT) placement is confirmed by chest X-ray and equal breath sounds. Gather surfactant (kept refrigerated), syringes, and a stopcock.
During Administration: The provider will instill the surfactant in aliquots (usually 2-4 positions). The nurse assists by:
Suctioning the ETT gently only if needed before administration.
Repositioning the infant (left side, right side, supine) as directed after each aliquot to promote distribution.
Providing manual ventilation with a bag-valve-mask (connected to O2) between aliquots as directed.
Post-procedure: Monitor closely for 1-2 hours. Key Point! Rapid improvement in oxygenation and compliance is common, so the ventilator settings or CPAP pressure may need to be weaned quickly to avoid over-distention and pneumothorax.
A Word from Your Senior Nurse
"In the NICU, your eyes and ears are your most critical assessment tools. That subtle increase in retractions or the new onset of a faint grunt can tell you more than a monitor sometimes. When you see a preterm baby working that hard to breathe—those severe retractions where you can see every rib—it’s not just a sign, it’s a cry for help from lungs that are too stiff to expand. Your quick recognition and escalation of care can make the difference between needing just a little CPAP and facing full respiratory failure. On the NCLEX and at the bedside, always prioritize the signs that show the body is struggling the most to maintain a basic function: breathing."
Respiratory Distress Syndrome — A respiratory disorder primarily of preterm infants caused by surfactant deficiency, leading to alveolar collapse, decreased lung compliance, and hypoxia.
Surfactant — A lipoprotein produced by type II alveolar cells that reduces surface tension within the alveoli, preventing their collapse at end-expiration.
Retractions — The visible sinking in of the soft tissues of the chest wall between the ribs (intercostal) or below the rib cage (substernal) during inspiration, indicating increased work of breathing.
Expiratory Grunting — A compensatory mechanism where an infant exhales against a partially closed glottis, creating positive end-expiratory pressure (PEEP) to help maintain alveolar volume.
Acrocyanosis — Bluish discoloration of the hands and feet in a newborn, a normal finding due to peripheral vasoconstriction and transitional circulation, distinct from central cyanosis.