Pediatric pulmonology is a medical specialty focused on diagnosing and treating lung and breathing problems in children, from premature newborns through young adults. These specialists handle everything from common conditions like asthma to complex cases involving children who depend on ventilators at home. With roughly 1,170 board-certified pediatric pulmonologists in the United States as of 2023, it’s a relatively small but essential subspecialty within pediatrics.
What Pediatric Pulmonologists Do
A pediatric pulmonologist picks up where a general pediatrician leaves off. When a child’s breathing problems are severe, persistent, or hard to diagnose, this is the specialist who steps in. Their patients range from premature infants with underdeveloped lungs to teenagers with chronic respiratory conditions, and their work spans both hospital and outpatient settings.
The specialty covers both straightforward and complex respiratory illness, but it also extends into cases where lung problems overlap with other medical conditions. A child born with a genetic syndrome, a heart condition, or a neuromuscular disease may have breathing challenges that require this kind of focused expertise. Pediatric pulmonologists also play a major role in sleep medicine, evaluating children with sleep-disordered breathing such as obstructive sleep apnea.
Conditions They Treat
Asthma is the most common reason children see a pediatric pulmonologist. It’s a chronic inflammatory condition of the airways that causes episodes of wheezing, coughing, chest tightness, and shortness of breath. A pulmonologist typically gets involved when asthma isn’t responding to standard treatment, when a child has had a severe or life-threatening flare, or when the diagnosis itself is uncertain.
Beyond asthma, the specialty covers a wide range of conditions:
- Cystic fibrosis: a genetic disease that causes thick mucus to build up in the lungs. Pulmonologists are central members of the interdisciplinary teams at accredited cystic fibrosis care centers, where they coordinate treatments and monitor lung function over a patient’s lifetime.
- Chronic cough: a cough lasting more than four weeks in children, which can signal anything from infection to airway abnormalities to reflux.
- Bronchiolitis: a viral infection that inflames the smallest airways, most common in children under two.
- Recurrent pneumonia: repeated lung infections that may point to an underlying structural or immune problem.
- Bronchopulmonary dysplasia: chronic lung disease in premature infants whose lungs were injured during early mechanical ventilation.
- Airway abnormalities: structural problems like narrowed airways, floppy airways (laryngomalacia), or vocal cord issues that affect breathing.
The Connection to Sleep Medicine
Many pediatric pulmonologists also evaluate and treat sleep-disordered breathing, which ranges from habitual snoring at the mild end to obstructive sleep apnea at the severe end. In children, the most common cause is enlarged tonsils and adenoids, unlike in adults where obesity is the primary driver. Other risk factors include chronic sinus problems, nasal allergies, a family history of sleep apnea, and high BMI.
Diagnosis typically involves an overnight sleep study, considered the gold standard for identifying sleep apnea in children. When moderate-to-severe sleep apnea is confirmed, surgical removal of the tonsils and adenoids is the first-line treatment, resolving symptoms in roughly 83% of cases. Children who are obese or have facial structural differences are more likely to have lingering symptoms after surgery and may need a CPAP machine at night or medication to reduce nasal inflammation. Untreated sleep apnea in children can fragment sleep enough to trigger sleepwalking, night terrors, and other sleep disruptions, so pulmonologists often screen for breathing problems in kids who present with those issues.
Diagnostic Tools
Spirometry is the most routine diagnostic test in pediatric pulmonology. It measures how much air a child can blow out and how fast, providing a clear picture of whether the airways are obstructed. Most children can perform the test reliably from about age six, though some manage it as young as four. The key measurements include how much air is exhaled in the first second and total lung capacity.
When spirometry isn’t enough, pulmonologists turn to imaging. Standard chest X-rays catch many problems, while CT scans provide detailed views of structural abnormalities deeper in the lungs. For cases that remain unclear, flexible bronchoscopy allows the doctor to guide a thin, lighted camera through a child’s airways to look directly at the tissue, take samples, or identify blockages. Other specialized tests include exhaled nitric oxide measurements (which detect a specific type of airway inflammation), sweat tests for cystic fibrosis, and immune function testing when recurrent infections suggest a deeper problem.
Caring for Technology-Dependent Children
One of the more complex roles in pediatric pulmonology involves managing children who need mechanical ventilation at home. These are children whose breathing depends on a ventilator, sometimes around the clock, due to conditions like spinal muscular atrophy, severe brain injury, or congenital disorders affecting the muscles of breathing.
Getting a child home on a ventilator is a carefully staged process. The child’s oxygen needs and ventilator settings must remain stable for days to weeks before discharge. At least two family caregivers need to be fully trained in operating the equipment, responding to alarms, and handling emergencies. An awake, trained caregiver must be present at all times. The home’s electrical system has to be inspected to confirm it can support the equipment, and the medical equipment company provides 24-hour support and monthly home visits. Once home, children are monitored with a pulse oximeter, especially during sleep.
The pulmonologist co-manages these patients alongside the child’s primary pediatrician in what’s called a medical home model, coordinating care across the many specialists these children typically need.
When a Child Gets Referred
General pediatricians handle most childhood respiratory problems on their own. A referral to a pulmonologist typically happens when a child’s asthma remains poorly controlled despite appropriate medication, or when a child has had a severe or life-threatening asthma attack. Referrals also come when the diagnosis is unclear, which is more common than you might think.
Several signs suggest a child’s breathing problem may not be simple asthma and warrants specialist evaluation: failure to thrive, a harsh high-pitched sound when breathing in (stridor), difficulty swallowing, severe or recurrent respiratory infections, a persistent wet cough, symptoms that started at birth, or complete lack of response to asthma medications. Year-round nasal symptoms or coughing that began in infancy also raise red flags. In these cases, a pulmonologist can run more targeted tests to find the actual cause.
Training and Certification
Becoming a pediatric pulmonologist requires extensive training. After medical school, physicians complete a three-year pediatric residency, followed by a three-year fellowship focused specifically on pediatric pulmonology. These fellowships are accredited by the Accreditation Council for Graduate Medical Education and include training in bronchoscopy, lung function testing, sleep medicine, and managing complex respiratory cases. Board certification is granted by the American Board of Pediatrics after passing a subspecialty examination.
The specialty remains small. Of the roughly 1,580 pediatricians who have ever been board-certified in pediatric pulmonology, only about 1,170 are currently certified and actively practicing. This limited workforce means that in many parts of the country, families may need to travel to academic medical centers for this type of care, though telemedicine has increasingly helped bridge that gap, particularly since its rapid adoption during the COVID-19 pandemic.