NBRC Neonatal/Pediatric Specialty (NPS) Practice Exam

You don’t earn the NBRC Neonatal/Pediatric Specialty credential by memorizing flashcards — you earn it by proving you can think clearly when a newborn or child’s life is on the line. This exam checks whether you can read the signs, interpret the numbers, and make the right call fast.

Our NBRC NPS Practice Exam is built to get you there. With 650 realistic questions and detailed explanations for every single one, you’ll train the same way you’ll be tested — through real clinical reasoning, not guesswork.

First attempt or retake, it doesn’t matter. This practice set helps you find your weak spots, build real confidence, and walk into exam day knowing exactly what to expect.

Prepare for the NBRC Neonatal/Pediatric Specialty (NPS) Exam with Confidence

This practice exam is built around the knowledge and clinical judgment expected from advanced neonatal and pediatric respiratory therapists.

• 650 comprehensive practice questions
• Detailed explanations for every answer
• Realistic NICU and PICU clinical scenarios
• Case-based questions that promote critical thinking
• Current neonatal and pediatric respiratory care concepts
• Questions covering patient assessment, treatment, monitoring, and ventilator management
• Suitable for first-time candidates and repeat test takers
• Mobile-friendly study format for flexible learning

Completing high-quality practice questions before the examination helps improve clinical reasoning, reinforces essential concepts, and increases familiarity with the exam format.

The Real Pain Points NPS Candidates Face

Many respiratory therapists discover that the NPS examination is much more challenging than expected because it focuses on clinical decision-making rather than simple memorization.

Common challenges include:

• Interpreting complex arterial blood gas results
• Adjusting ventilator settings using pulmonary mechanics
• Managing neonatal and pediatric emergencies
• Distinguishing similar respiratory disorders
• Understanding high-frequency ventilation strategies
• Recognizing subtle patient deterioration
• Applying evidence-based respiratory care under time pressure
• Maintaining confidence during lengthy clinical case questions

Our practice exam targets these challenges with realistic scenarios that mirror situations encountered in neonatal intensive care units (NICUs) and pediatric intensive care units (PICUs).

Regular exposure to case-based questions helps improve confidence and prepares you to make accurate clinical decisions during the actual examination.

Who Should Take This NPS Practice Exam?

This study resource is designed for respiratory care professionals preparing for advanced neonatal and pediatric credentialing.

Ideal for:

• Registered Respiratory Therapists (RRTs)
• Respiratory therapists preparing for the NBRC NPS examination
• NICU respiratory therapists
• PICU respiratory therapists
• Neonatal transport team members
• Pediatric critical care clinicians
• Respiratory therapy graduates seeking specialty certification
• Candidates preparing for exam retakes
• Therapists looking to strengthen neonatal and pediatric critical care knowledge

Whether you have years of experience or are entering specialty practice, these questions provide valuable exam preparation.

What You’ll Learn (NPS Covered Topics)

The practice questions cover the major clinical concepts expected on the NBRC Neonatal/Pediatric Specialty examination.

Topics include:

• Neonatal respiratory distress syndrome (RDS)
• Surfactant replacement therapy
• Persistent pulmonary hypertension of the newborn (PPHN)
• Meconium aspiration syndrome
• Bronchopulmonary dysplasia (BPD)
• Congenital diaphragmatic hernia
• Neonatal resuscitation principles
• Pediatric respiratory emergencies
• Mechanical ventilation
• Lung-protective ventilation
• High-frequency oscillatory ventilation (HFOV)
• Pressure-regulated volume control (PRVC)
• Volume-targeted ventilation
• CPAP and noninvasive ventilation
• High-flow nasal cannula therapy
• Ventilator graphics and waveform interpretation
• Pulmonary mechanics
• Compliance and airway resistance
• Auto-PEEP recognition
• Patient-ventilator synchrony
• Arterial blood gas interpretation
• Capnography interpretation
• Oxygen therapy
• Airway management
• Difficult airway scenarios
• Tracheostomy management
• Extubation readiness
• Ventilator liberation
• Pediatric asthma
• Bronchiolitis
• Pneumonia
• ARDS
• Air leak syndromes
• Pneumothorax
• Pulmonary edema
• Congenital heart disease
• Airway clearance therapy
• Respiratory pharmacology
• NICU and PICU clinical management
• Evidence-based respiratory care

These topics reflect the advanced knowledge and critical thinking required for specialty respiratory practice.

What Makes This Practice Exam Different?

Unlike question banks that focus primarily on memorization, this resource emphasizes clinical reasoning and bedside decision-making.

Features include:

• Long-form clinical case scenarios
• Realistic NICU and PICU patient presentations
• Ventilator management cases
• Blood gas interpretation exercises
• Pulmonary mechanics calculations
• Waveform analysis questions
• Emergency response scenarios
• Prioritization and next-step management questions
• Evidence-based answer explanations
• Progressive difficulty throughout the question bank

Each explanation reinforces the underlying physiology and clinical principles needed to answer similar questions on the actual examination.

How This Practice Test Helps You Pass the NPS Exam

Consistent practice builds confidence, strengthens clinical judgment, and improves test performance.

Benefits include:

• Identifies weak knowledge areas
• Improves clinical decision-making
• Develops confidence interpreting patient data
• Reinforces neonatal and pediatric respiratory care principles
• Builds familiarity with NBRC-style questions
• Enhances critical thinking skills
• Improves time management during the exam
• Reduces exam-day anxiety
• Supports long-term knowledge retention

Studying with realistic clinical scenarios helps prepare you for the type of reasoning expected throughout the certification examination.

Why Practice Questions Matter

Reading textbooks provides important knowledge, but applying that knowledge in realistic patient scenarios is what prepares candidates for specialty certification.

Practice questions allow you to:

• Apply respiratory care concepts
• Recognize clinical patterns
• Improve diagnostic reasoning
• Strengthen ventilator management skills
• Practice prioritizing interventions
• Understand why each answer is correct or incorrect
• Gain confidence before test day

The more patient cases you analyze, the more comfortable you become making clinical decisions under exam conditions.

Designed Around Real Clinical Decision-Making

This practice exam focuses on situations encountered by respiratory therapists caring for critically ill newborns, infants, children, and adolescents.

Case scenarios include:

• NICU emergencies
• PICU respiratory failure
• Mechanical ventilation adjustments
• High-frequency ventilation management
• Neonatal resuscitation
• Pediatric airway emergencies
• Congenital cardiac disorders
• Ventilator troubleshooting
• Capnography interpretation
• Extubation decisions
• Respiratory deterioration
• Transport considerations
• Oxygenation and ventilation strategies

These realistic cases encourage deeper understanding rather than simple memorization.

Study Smarter with Detailed Answer Explanations

Every question includes a detailed explanation that helps you understand both the correct answer and the clinical reasoning behind it.

Each explanation is designed to:

• Reinforce key respiratory care concepts
• Explain why the correct answer is appropriate
• Clarify why other options are less suitable
• Strengthen long-term retention
• Improve bedside clinical judgment

Learning from explanations is one of the most effective ways to prepare for specialty certification.

Why Choose Our Practice Exam?

Thousands of healthcare professionals rely on PrepPool to prepare for certification examinations because our study materials focus on practical application rather than rote memorization.

Our practice exams are designed to help you:

• Study efficiently
• Build clinical confidence
• Strengthen critical thinking
• Practice realistic exam scenarios
• Prepare with comprehensive question banks
• Approach exam day with greater confidence

Whether your goal is earning your first specialty credential or successfully passing after a previous attempt, this practice exam provides structured preparation that supports your success.

NPS Sample Questions and Answers

Question 1

A respiratory therapist is caring for a 29-week gestation premature infant weighing 1.15 kg who is receiving bubble CPAP at 6 cm H₂O with an FiO₂ of 0.35. Over the past hour, the infant has developed increasing tachypnea, moderate substernal retractions, intermittent grunting, and oxygen saturation has decreased from 94% to 87%. A capillary blood gas reveals:

• pH: 7.25
• PaCO₂: 61 mm Hg
• HCO₃⁻: 26 mEq/L

A chest radiograph demonstrates diffuse reticulogranular infiltrates with air bronchograms.

What is the most appropriate next intervention?

A. Increase CPAP to 10 cm H₂O and continue observation

B. Administer exogenous surfactant after endotracheal intubation

C. Begin inhaled nitric oxide therapy

D. Decrease CPAP and increase oxygen concentration to 60%

Correct Answer: B

Explanation:

This infant demonstrates worsening neonatal respiratory distress syndrome (RDS) despite appropriate CPAP support. Progressive hypoxemia, hypercapnia, respiratory acidosis, increased work of breathing, and the classic chest radiograph strongly suggest surfactant deficiency causing alveolar collapse. Current neonatal management recommends selective surfactant administration when CPAP is no longer sufficient to maintain adequate gas exchange. Intubation followed by surfactant delivery, preferably using minimally invasive techniques when appropriate, improves lung compliance and reduces ventilator requirements. Increasing CPAP alone may delay definitive treatment, while inhaled nitric oxide is not indicated for surfactant deficiency without pulmonary hypertension. Simply increasing FiO₂ exposes the infant to unnecessary oxygen toxicity without correcting the underlying alveolar instability.

Question 2

A 7-year-old child with a history of severe asthma arrives in the emergency department with marked respiratory distress despite receiving three nebulized albuterol treatments and systemic corticosteroids. Assessment reveals:

• Respiratory rate: 38/min
• Heart rate: 148/min
• SpO₂: 92% on 40% oxygen
• Minimal wheezing with markedly diminished breath sounds
• Unable to speak complete sentences

Which finding most strongly indicates impending respiratory failure?

A. Persistent tachycardia

B. Diminished breath sounds despite severe respiratory distress

C. Oxygen saturation of 92%

D. Respiratory rate of 38/min

Correct Answer: B

Explanation:

A “silent chest,” characterized by markedly diminished breath sounds in a child with severe asthma, is a life-threatening finding that indicates critically reduced airflow rather than clinical improvement. As airway obstruction worsens, less air moves through the lungs, causing wheezing to disappear despite increasing respiratory failure. This finding often precedes hypercapnia, fatigue, and respiratory arrest. Tachycardia and tachypnea are expected compensatory responses during severe asthma, while an oxygen saturation of 92% is concerning but less predictive of imminent failure than dramatically decreased air movement. Recognition of a silent chest should prompt immediate escalation of care, including preparation for advanced airway management if the patient’s condition continues to deteriorate.

Question 3

A term newborn delivered through meconium-stained amniotic fluid is brought to the radiant warmer immediately after birth. The infant is vigorous with:

• Heart rate: 145/min
• Strong respiratory effort
• Good muscle tone
• Loud spontaneous cry

What is the most appropriate initial management?

A. Perform immediate endotracheal suctioning before stimulation

B. Perform routine newborn care while monitoring respiratory status

C. Insert an orogastric tube to reduce aspiration risk

D. Begin positive-pressure ventilation immediately

Correct Answer: B

Explanation:

Current Neonatal Resuscitation Program (NRP) recommendations no longer support routine endotracheal suctioning for vigorous infants born through meconium-stained amniotic fluid. A vigorous newborn with effective respirations, good tone, and a heart rate above 100 beats per minute should receive standard newborn care, including drying, warming, maintaining airway patency if needed, and ongoing observation. Studies have shown that routine tracheal suctioning does not improve outcomes and may delay essential stabilization measures. Positive-pressure ventilation is reserved for infants with apnea, gasping respirations, or persistent bradycardia. Careful monitoring remains important because respiratory symptoms related to meconium aspiration syndrome may develop after the initial stabilization period.

Question 4

A 3-month-old infant with bronchiolitis is receiving heated high-flow nasal cannula (HFNC) therapy at 2 L/kg/min with an FiO₂ of 0.35. After one hour, assessment shows:

• Respiratory rate decreased from 68 to 50/min
• Heart rate decreased from 176 to 145/min
• SpO₂ improved from 89% to 96%
• Mild subcostal retractions remain
• Infant is feeding comfortably

What is the best interpretation of these findings?

A. HFNC therapy has failed and intubation is indicated.

B. Continue current therapy because the infant is demonstrating clinical improvement.

C. Increase flow immediately because retractions persist.

D. Transition to conventional nasal cannula immediately.

Correct Answer: B

Explanation:

This infant demonstrates multiple objective signs of successful HFNC therapy. Reduced respiratory and heart rates, improved oxygenation, decreased work of breathing, and the ability to feed comfortably indicate improved respiratory mechanics and gas exchange. Mild residual retractions are common early during recovery from bronchiolitis and do not necessarily require escalation if the overall clinical picture is improving. Intubation is reserved for worsening respiratory distress, apnea, severe hypercapnia, or failure of noninvasive support. Likewise, weaning therapy prematurely could result in deterioration before airway inflammation has sufficiently resolved. Continued close monitoring with gradual weaning as tolerated represents the most appropriate management strategy.

Question 5

A neonate with persistent pulmonary hypertension of the newborn (PPHN) is mechanically ventilated with optimal lung recruitment. Despite an FiO₂ of 1.0, the infant remains hypoxemic. Echocardiography confirms elevated pulmonary vascular resistance with right-to-left shunting through the ductus arteriosus.

Which therapy directly targets the underlying pathophysiology?

A. Intravenous furosemide

B. Inhaled nitric oxide

C. Aerosolized albuterol

D. Intravenous caffeine citrate

Correct Answer: B

Explanation:

Persistent pulmonary hypertension of the newborn results from failure of the normal postnatal decline in pulmonary vascular resistance, producing right-to-left shunting and severe hypoxemia. Inhaled nitric oxide (iNO) is a selective pulmonary vasodilator that relaxes pulmonary vascular smooth muscle in ventilated lung regions without causing significant systemic hypotension. By reducing pulmonary artery pressure, iNO improves pulmonary blood flow and decreases extrapulmonary shunting, resulting in better oxygenation. Furosemide treats fluid overload but does not reduce pulmonary vascular resistance. Albuterol primarily targets bronchospasm, and caffeine citrate is used to stimulate respiration in apnea of prematurity. For infants with confirmed PPHN and adequate lung recruitment, inhaled nitric oxide remains the standard first-line pulmonary vasodilator, while ECMO may be considered if severe hypoxemia persists despite optimal medical management.

Question 6

A 5-year-old child with viral pneumonia is receiving pressure-controlled mechanical ventilation. Over the past several hours, the peak inspiratory pressure (PIP) has increased from 24 cm H₂O to 33 cm H₂O while the plateau pressure has remained stable at 20 cm H₂O. Breath sounds reveal diffuse expiratory wheezing bilaterally, and oxygen saturation has decreased from 95% to 91%.

What is the most likely cause of the increased peak inspiratory pressure?

A. Decreased lung compliance due to pulmonary edema

B. Increased airway resistance caused by bronchospasm

C. Development of a tension pneumothorax

D. Inadequate humidification causing oxygen toxicity

Correct Answer: B

Explanation:

Peak inspiratory pressure reflects both airway resistance and lung compliance, whereas plateau pressure primarily reflects alveolar pressure and lung compliance. When the PIP rises while the plateau pressure remains unchanged, the problem usually involves increased airway resistance rather than worsening compliance. In this child, diffuse bilateral wheezing strongly supports bronchospasm as the cause of the increased resistance. Pulmonary edema or acute respiratory distress syndrome would typically increase both PIP and plateau pressure because lung compliance decreases. A tension pneumothorax often produces sudden cardiovascular instability, unilateral absent breath sounds, and worsening oxygenation. The therapist should assess airway patency, administer prescribed bronchodilators, and reassess ventilator pressures following treatment.

Question 7

A full-term newborn develops respiratory distress within the first hour after birth. Physical examination reveals mild tachypnea without significant retractions. Chest radiography demonstrates prominent central vascular markings, fluid within the interlobar fissures, and mild hyperinflation. Oxygen saturation is 95% while receiving 25% oxygen.

Which diagnosis is most consistent with these findings?

A. Neonatal respiratory distress syndrome

B. Meconium aspiration syndrome

C. Transient tachypnea of the newborn

D. Congenital diaphragmatic hernia

Correct Answer: C

Explanation:

Transient tachypnea of the newborn (TTN) results from delayed clearance of fetal lung fluid after birth. It commonly affects term or late preterm infants, especially those delivered by cesarean section without labor. Typical findings include mild tachypnea, minimal oxygen requirements, hyperinflation, prominent pulmonary vascular markings, and fluid in the interlobar fissures on chest radiographs. Most infants improve within 24 to 72 hours with supportive care alone. Respiratory distress syndrome is primarily associated with surfactant deficiency in premature infants and presents with diffuse ground-glass infiltrates and low lung volumes. Meconium aspiration usually causes coarse patchy infiltrates and areas of air trapping, while congenital diaphragmatic hernia demonstrates abdominal contents within the thoracic cavity and significant respiratory compromise.

Question 8

A 10-year-old patient with cystic fibrosis is admitted for treatment of a pulmonary exacerbation. The respiratory therapist is planning airway clearance therapy.

Which intervention should generally be performed before chest physiotherapy to maximize secretion removal?

A. Administer an inhaled bronchodilator

B. Restrict oral fluids

C. Increase supplemental oxygen to 100%

D. Administer intravenous corticosteroids

Correct Answer: A

Explanation:

Administering an inhaled bronchodilator before airway clearance therapy helps relax airway smooth muscle, reduces bronchospasm, and improves airflow to obstructed lung regions. Better airway caliber allows mobilized secretions to move more effectively during percussion, vibration, oscillatory therapy, or positive expiratory pressure treatments. Many cystic fibrosis treatment plans also include inhaled mucolytics or hypertonic saline after bronchodilator administration to further enhance mucus clearance. Restricting fluids may worsen secretion viscosity, while increasing oxygen concentration is unnecessary in patients with adequate oxygenation. Intravenous corticosteroids are not routinely indicated for pulmonary exacerbations unless another condition, such as asthma, is also present. Coordinating therapies in the proper sequence significantly improves airway clearance effectiveness.

Question 9

A 32-week gestation infant receiving conventional mechanical ventilation develops sudden oxygen desaturation, bradycardia, and hypotension. Breath sounds are absent over the right lung, and transillumination of the chest reveals a bright glow on the affected side.

What should the respiratory therapist recognize as the highest-priority diagnosis?

A. Right lower lobe atelectasis

B. Pulmonary hemorrhage

C. Tension pneumothorax

D. Patent ductus arteriosus

Correct Answer: C

Explanation:

This infant has classic findings of a tension pneumothorax, a medical emergency requiring immediate recognition and treatment. Sudden deterioration during positive-pressure ventilation, unilateral absent breath sounds, hypotension, bradycardia, and positive chest transillumination strongly indicate air accumulating within the pleural space under pressure. As intrathoracic pressure rises, venous return decreases, resulting in cardiovascular collapse if untreated. Immediate needle decompression followed by chest tube placement is often lifesaving. Atelectasis usually causes volume loss rather than hyperexpansion and does not produce positive transillumination. Pulmonary hemorrhage presents with bloody secretions and worsening oxygenation, while a patent ductus arteriosus generally causes a more gradual clinical decline with characteristic cardiovascular findings rather than sudden unilateral respiratory compromise.

Question 10

A 14-year-old patient with diabetic ketoacidosis is breathing rapidly with deep respirations. The respiratory therapist obtains an arterial blood gas showing:

• pH: 7.18
• PaCO₂: 22 mm Hg
• HCO₃⁻: 8 mEq/L
• PaO₂: 97 mm Hg

How should these results be interpreted?

A. Primary respiratory alkalosis with metabolic compensation

B. Primary metabolic acidosis with appropriate respiratory compensation

C. Mixed metabolic and respiratory acidosis

D. Uncompensated respiratory acidosis

Correct Answer: B

Explanation:

The markedly decreased bicarbonate and acidic pH identify a primary metabolic acidosis. The low PaCO₂ reflects compensatory hyperventilation, commonly called Kussmaul respirations, which helps remove carbon dioxide and partially offset the metabolic acidosis. This compensatory response is expected in diabetic ketoacidosis as the body attempts to restore acid-base balance. Because the pH remains below normal, compensation is only partial and cannot completely correct the underlying metabolic disorder. Respiratory therapists should recognize this pattern and avoid interventions that unnecessarily suppress ventilation unless mechanical ventilation becomes clinically necessary. Definitive treatment focuses on correcting dehydration, insulin deficiency, electrolyte abnormalities, and the underlying cause of diabetic ketoacidosis rather than attempting to normalize ventilation alone.

Question 11

A respiratory therapist is assisting with the delivery of a 26-week gestation infant. The infant is apneic with a heart rate of 70 beats/min immediately after birth despite drying, stimulation, and airway positioning. Positive-pressure ventilation (PPV) is initiated with an FiO₂ of 0.30 using a T-piece resuscitator. After 30 seconds, the heart rate remains 68 beats/min, and chest movement is minimal.

What is the most appropriate next action?

A. Increase FiO₂ to 100% and continue ventilation without reassessment

B. Begin chest compressions immediately

C. Perform ventilation corrective steps (MR SOPA) and optimize effective ventilation

D. Administer intravenous epinephrine

Correct Answer: C

Explanation:

The most common cause of persistent neonatal bradycardia during resuscitation is ineffective ventilation. Before progressing to chest compressions or medications, the Neonatal Resuscitation Program (NRP) emphasizes confirming that positive-pressure ventilation is effective. Minimal chest movement indicates inadequate lung inflation, making ventilation corrective steps (MR SOPA: Mask adjustment, Reposition airway, Suction mouth and nose, Open mouth, Pressure increase, Alternative airway) the priority. Chest compressions are indicated only if the heart rate remains below 60 beats/min after at least 30 seconds of effective ventilation. Epinephrine should not be administered until ventilation is optimized and compressions have been initiated when indicated. Correcting ventilation often rapidly improves heart rate without additional interventions.

Question 12

A 4-year-old child with severe upper airway obstruction develops inspiratory stridor, suprasternal retractions, anxiety, and increasing fatigue. Oxygen saturation falls to 88% despite humidified oxygen. The child prefers sitting upright and becomes significantly more distressed when lying flat.

What is the respiratory therapist’s highest priority?

A. Obtain a throat culture before treatment

B. Prepare for controlled airway management while minimizing agitation

C. Place the child supine for complete airway examination

D. Encourage forceful coughing to clear the obstruction

Correct Answer: B

Explanation:

Children with significant upper airway obstruction can deteriorate rapidly into complete airway occlusion. Signs such as stridor at rest, increasing work of breathing, fatigue, and worsening hypoxemia require immediate preparation for definitive airway management. Equally important is minimizing agitation because crying, struggling, or unnecessary procedures may worsen airway narrowing. The child should remain in the position of comfort while experienced personnel prepare advanced airway equipment. Forceful airway examination or placing the child supine can precipitate sudden airway collapse, particularly in conditions such as epiglottitis. Maintaining spontaneous breathing until the airway is secured is generally preferred whenever clinically feasible.

Question 13

A 30-week premature infant with severe respiratory distress syndrome is transitioned from conventional mechanical ventilation to high-frequency oscillatory ventilation (HFOV). Shortly afterward, oxygen saturation remains low despite increasing FiO₂. Chest radiography demonstrates lung expansion to only seven posterior ribs.

Which ventilator adjustment is most appropriate to improve oxygenation?

A. Increase oscillatory frequency

B. Increase mean airway pressure

C. Decrease inspiratory time

D. Decrease amplitude

Correct Answer: B

Explanation:

During HFOV, oxygenation depends primarily on mean airway pressure (MAP) and FiO₂, whereas carbon dioxide elimination is influenced mainly by amplitude and frequency. A chest radiograph showing inadequate lung expansion suggests insufficient alveolar recruitment. Increasing the MAP helps recruit collapsed alveoli, increases functional residual capacity, and improves oxygenation while minimizing repetitive alveolar collapse. Increasing frequency generally decreases tidal volume delivery and primarily affects ventilation rather than oxygenation. Decreasing amplitude would worsen carbon dioxide removal without improving oxygenation. The respiratory therapist should increase MAP incrementally while carefully monitoring oxygenation, blood pressure, and chest expansion to avoid overdistension and potential air leak complications.

Question 14

A 2-month-old infant with respiratory syncytial virus (RSV) bronchiolitis suddenly develops recurrent apnea lasting 18 to 22 seconds, accompanied by cyanosis and bradycardia. Between episodes, the infant remains lethargic with shallow respirations.

What is the most appropriate immediate management?

A. Continue observation because apnea is expected with RSV

B. Initiate ventilatory support and prepare for possible endotracheal intubation

C. Increase oral feeding to improve energy reserves

D. Administer mucolytic therapy and reassess in several hours

Correct Answer: B

Explanation:

Young infants with RSV bronchiolitis are at increased risk for apnea, particularly those born prematurely or younger than three months of age. Recurrent apnea associated with cyanosis, bradycardia, and lethargy indicates failure to maintain adequate ventilation and requires immediate respiratory support. Bag-mask ventilation may be necessary initially while preparations are made for definitive airway management if apnea persists. Observation alone is inappropriate because prolonged apnea can rapidly lead to severe hypoxemia and cardiac arrest. Oral feeding increases aspiration risk in infants with significant respiratory compromise, and mucolytic therapy has not demonstrated routine benefit in managing acute bronchiolitis. Prompt recognition and stabilization are critical to preventing further deterioration.

Question 15

A 6-year-old child is mechanically ventilated for acute respiratory distress syndrome (ARDS) secondary to bacterial sepsis. Current ventilator settings include:

• Mode: Volume Assist-Control
• Tidal Volume: 6 mL/kg predicted body weight
• PEEP: 12 cm H₂O
• FiO₂: 0.55

Arterial blood gas results are:

• pH: 7.34
• PaCO₂: 47 mm Hg
• PaO₂: 78 mm Hg

Plateau pressure measures 27 cm H₂O.

Which aspect of this ventilation strategy best reflects current lung-protective principles?

A. Delivering tidal volumes of approximately 6 mL/kg predicted body weight

B. Increasing tidal volume to normalize PaCO₂

C. Reducing PEEP to minimize intrathoracic pressure

D. Maintaining FiO₂ at 100% until extubation

Correct Answer: A

Explanation:

Modern pediatric ARDS management emphasizes lung-protective ventilation to reduce ventilator-induced lung injury. Using tidal volumes of approximately 6 mL/kg predicted body weight helps minimize alveolar overdistension while maintaining acceptable gas exchange. Plateau pressures should generally remain below 30 cm H₂O, making the measured pressure of 27 cm H₂O appropriate. Mild hypercapnia is often accepted as part of permissive hypercapnia when clinically tolerated because aggressively increasing tidal volume can increase barotrauma and volutrauma. Reducing PEEP unnecessarily may promote alveolar collapse, while prolonged exposure to an FiO₂ of 100% increases the risk of oxygen toxicity. Successful management requires balancing oxygenation with strategies that protect the injured lungs from further mechanical damage.

Question 21

A respiratory therapist is caring for a 2-day-old, 28-week gestation infant receiving nasal CPAP at 7 cm H₂O. The infant develops increasing abdominal distention, feeding intolerance, and visible bowel loops. Respiratory status remains stable, and oxygen saturation is 95% on an FiO₂ of 0.28.

Which intervention is most appropriate to reduce the complication while maintaining respiratory support?

A. Discontinue CPAP immediately and switch to room air

B. Insert an orogastric tube for intermittent or continuous gastric decompression

C. Increase CPAP to improve diaphragmatic excursion

D. Begin inhaled nitric oxide therapy

Correct Answer: B

Explanation:

Nasal CPAP frequently causes gastric insufflation because air can enter the esophagus and stomach, particularly in premature infants. This phenomenon, often referred to as “CPAP belly,” may lead to abdominal distention, feeding intolerance, and impaired diaphragmatic movement if left untreated. Since this infant’s oxygenation and ventilation remain stable, discontinuing CPAP is unnecessary. Gastric decompression with an orogastric tube relieves abdominal pressure while allowing the infant to continue receiving effective noninvasive respiratory support. Increasing CPAP would likely worsen gastric inflation, and inhaled nitric oxide has no role in managing gastric distention. Regular assessment of abdominal girth and bowel function is essential in premature infants receiving prolonged CPAP therapy.

Question 22

A 12-year-old child with severe community-acquired pneumonia is receiving mechanical ventilation. Overnight, oxygenation progressively worsens despite increasing FiO₂. The respiratory therapist calculates the PaO₂/FiO₂ ratio to be 95 mm Hg.

Which finding best supports the diagnosis of severe pediatric ARDS?

A. Elevated respiratory rate with mild hypoxemia

B. PaO₂/FiO₂ ratio less than 100 despite positive-pressure ventilation

C. Peak inspiratory pressure greater than 25 cm H₂O

D. Respiratory alkalosis on arterial blood gas

Correct Answer: B

Explanation:

The PaO₂/FiO₂ ratio is an important measure of oxygenation impairment in patients with ARDS. A ratio below 100 while receiving appropriate positive-pressure ventilation indicates severe oxygenation failure consistent with severe pediatric ARDS. This reflects widespread alveolar injury, inflammation, and impaired gas exchange. Although elevated airway pressures and tachypnea may accompany ARDS, they are not diagnostic. Respiratory alkalosis is common early in many respiratory illnesses but does not define ARDS severity. Identifying severe ARDS promptly allows clinicians to optimize lung-protective ventilation, appropriate PEEP strategies, conservative oxygen use, and consideration of advanced therapies when conventional management fails.

Question 23

A newborn develops central cyanosis shortly after delivery. Despite receiving 100% oxygen for 10 minutes, oxygen saturation improves only minimally. Lung examination is clear, and chest radiography appears normal. Echocardiography is pending.

Which diagnosis should be strongly suspected?

A. Neonatal respiratory distress syndrome

B. Transposition of the great arteries

C. Transient tachypnea of the newborn

D. Neonatal pneumonia

Correct Answer: B

Explanation:

Failure to improve oxygenation despite administration of 100% oxygen strongly suggests cyanotic congenital heart disease rather than primary pulmonary disease. Transposition of the great arteries (TGA) is one of the most common causes of profound neonatal cyanosis with relatively clear lung fields. In TGA, systemic and pulmonary circulations function in parallel rather than in series, limiting oxygen delivery unless mixing occurs through the ductus arteriosus, foramen ovale, or ventricular septal defect. Recognition is critical because prostaglandin E₁ infusion may be lifesaving by maintaining ductal patency until definitive surgical repair can be performed. The hyperoxia test remains a valuable clinical tool when differentiating cardiac from pulmonary causes of neonatal cyanosis.

Question 24

A respiratory therapist is suctioning an intubated 4-year-old patient. During the procedure, the child’s heart rate decreases from 118 to 58 beats/min, and oxygen saturation falls rapidly.

What is the most likely cause of the bradycardia?

A. Excessive positive end-expiratory pressure

B. Vagal stimulation during airway suctioning combined with hypoxemia

C. Acute pulmonary embolism

D. Hyperventilation before suctioning

Correct Answer: B

Explanation:

Children, particularly infants and young pediatric patients, are highly susceptible to vagally mediated bradycardia during airway suctioning. The combination of airway stimulation and transient hypoxemia caused by interruption of ventilation can significantly slow the heart rate. Best practice includes preoxygenating when appropriate, limiting suction duration to the minimum necessary, using the correct catheter size, and continuously monitoring heart rate and oxygen saturation throughout the procedure. If significant bradycardia develops, suctioning should be stopped immediately, oxygenation restored, and the patient reassessed. Excessive suction pressure and prolonged catheter insertion also increase the risk of this complication.

Question 25

A premature infant receiving caffeine therapy for apnea of prematurity has experienced no apnea, bradycardia, or desaturation events for seven consecutive days. The infant is now 35 weeks corrected gestational age and breathing comfortably in room air.

What is the most appropriate recommendation regarding caffeine therapy?

A. Continue caffeine indefinitely until hospital discharge

B. Consider discontinuing caffeine while monitoring for recurrence of apnea

C. Increase the caffeine dose before discharge

D. Replace caffeine with inhaled bronchodilator therapy

Correct Answer: B

Explanation:

Caffeine citrate is highly effective for treating apnea of prematurity by stimulating the central respiratory drive and improving diaphragmatic function. Once the infant approaches term-equivalent maturity and remains free of clinically significant apnea for several days, discontinuation should be considered with careful monitoring. Most neonatal intensive care units observe infants for recurrence before discharge to ensure respiratory stability. Continuing therapy indefinitely provides little additional benefit and may unnecessarily prolong hospitalization. Bronchodilators have no established role in treating apnea of prematurity because the condition results from immature respiratory control rather than airway obstruction.