Nursing care
RDS vs TTN: surfactant deficiency or leftover lung fluid in a breathless newborn
Written and reviewed by Hannah Nguyen, MSN, RN, CPN · 4 min read · Updated November 2026
Short answer
RDS vs TTN is surfactant deficiency versus retained lung fluid. Respiratory distress syndrome (RDS) mainly affects preterm babies whose lungs lack surfactant, and it worsens before improving over several days. Transient tachypnea of the newborn (TTN) affects late preterm or early term babies, often after cesarean birth without labor, and usually settles within 2 to 3 days with little support.
The single most useful clue: gestational age and the birth story
MSD Manuals explains that surfactant is not made in adequate amounts until about 34 to 36 weeks of gestation, so RDS risk climbs as gestational age drops. A baby born at 29 weeks with grunting and retractions has RDS high on the list. Maternal diabetes, male sex and cesarean delivery add risk.
TTN follows a different story. MedlinePlus describes it in early term or late preterm babies, more often after cesarean birth when labor had not started, in twins and in babies of mothers with diabetes or asthma. MSD Manuals explains why labor matters: without it, the lungs clear less of the fluid that filled them before birth.
Signs that look the same in both
Both babies breathe fast and can grunt, flare their nostrils, retract and turn blue. MedlinePlus lists all of these for TTN, beginning within one to two hours of birth, and MSD Manuals lists the same pattern for RDS starting immediately or within hours. A student who tries to separate them by the presence of grunting is using a finding they share.
Sepsis and pneumonia can look the same too. MSD Manuals notes that TTN, RDS and infection present similarly, so the workup usually includes a chest X-ray, a complete blood count and blood cultures. Some babies receive antibiotics until infection is excluded, which is a reason to expect that order rather than question it.
Chest X-ray and the direction of the trend
The X-ray patterns differ. MSD Manuals describes RDS as diffuse atelectasis with a ground-glass look and visible air bronchograms, meaning collapsed alveoli with open airways standing out against them. TTN shows normal or overinflated lungs with streaky markings near the center of the chest and fluid often seen in the fissures, while the lung edges stay clear.
The course is the other separator. With support, RDS resolves within 4 or 5 days once the baby starts making surfactant, according to MSD Manuals, and blood gases may show both low oxygen and high carbon dioxide along the way. MedlinePlus states that TTN usually improves within 24 to 48 hours and is most often gone by 48 to 72 hours.
Nursing priorities for each
For RDS, MSD Manuals describes noninvasive support such as CPAP combined with surfactant therapy, with antenatal corticosteroids given between 24 and 34 weeks to reduce severity. The nurse monitors oxygen saturation, work of breathing, apnea and temperature, and reports worsening retractions, rising oxygen needs or lethargy. The live surfactant page covers administration care.
For TTN, care is supportive: oxygen with pulse oximetry, sometimes CPAP, and IV fluids when breathing is too fast for safe feeding, as MedlinePlus describes. The nurse watches for the expected improvement. A baby with suspected TTN who is getting worse at 24 hours, rather than better, does not fit the expected course and needs the provider to reconsider the diagnosis.
Hypothetical practice scenario
Hypothetical scenario, not a real exam item: two newborns have a respiratory rate of 80. Baby A was born at 38 weeks by scheduled cesarean without labor and needs a little oxygen. Baby B was born at 30 weeks, is grunting, and needed more oxygen at 12 hours than at 2 hours. Which baby needs the nurse first?
Baby B. A 30-week birth fits surfactant deficiency, and an oxygen need that keeps rising signals worsening disease. Choosing Baby A because cesarean birth sounds riskier misreads the clue: cesarean without labor fits TTN, which usually improves on its own. Baby A still needs monitoring, just not first.
Sources and further reading
MSD Manual Professional Version: Respiratory Distress Syndrome in Neonates. Surfactant timing at 34 to 36 weeks, risk factors, signs and onset, blood gases, ground-glass X-ray with air bronchograms, CPAP plus surfactant, antenatal corticosteroids at 24 to 34 weeks, resolution in 4 or 5 days.
MSD Manual Professional Version: Transient Tachypnea of the Newborn. Delayed fluid clearance, effect of absent labor, X-ray with perihilar streaking and fissure fluid, recovery in 2 to 3 days, workup to separate TTN from RDS and sepsis.
MedlinePlus: Transient tachypnea of the newborn. Risk factors, onset within 1 to 2 hours, symptoms, oxygen and CPAP, IV fluids, antibiotics if infection suspected, improvement in 24 to 48 hours and resolution by 48 to 72 hours, later wheezing.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our maternity and newborn practice questions are the closest set to what this page covers.
Common questions
Which babies get TTN?
Mostly late preterm and early term babies, especially those born before 38 weeks, by cesarean delivery without labor, to mothers with diabetes or asthma, and twins. These babies are slower to clear the fluid that filled their lungs before birth.
How is RDS treated in preterm babies?
Noninvasive breathing support such as CPAP combined with surfactant therapy given into the airway, while the nurse tracks oxygen needs and work of breathing. Antenatal corticosteroids given to the mother before an expected preterm birth between 24 and 34 weeks reduce how severe RDS becomes.
How long does TTN last?
Most babies improve within 24 to 48 hours, and the condition usually resolves by 48 to 72 hours. Some need a few days of support. Most recover fully, though some may wheeze later in infancy.