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Transient tachypnea - newborn

Alternative Names

TTN; Wet lungs - newborns; Retained fetal lung fluid; Transient RDS; Prolonged transition

Definition

Transient tachypnea is a respiratory disorder seen shortly after delivery in full-term or late preterm babies.

  • Transient means it is short-lived (usually less than 24 hours).
  • Tachypnea means rapid breathing (most normal newborns take 40 - 60 breaths per minute).

Causes

As the baby grows in the womb, the lungs make a special fluid. This fluid fills the developing baby's lungs and helps them grow. When the baby is born at term, chemicals released during labor tell the lungs to stop making this special fluid. The baby's lungs start removing or reabsorbing it.

The first few breaths a baby takes after delivery fill the lungs with air and help to clear most of the remaining lung fluid.

Leftover fluid in the lungs causes the baby to breathe rapidly. It is harder for the small air sacs of the lungs to stay open.

Transient tachypnea is more likely to occur in babies who were:

  • Born before 38 weeks gestation
  • Delivered by C-section, especially if labor has not already started
  • Born to a mother with diabetes

Symptoms

Newborns with transient tachypnea have breathing problems soon after birth, most often within 1 - 2 hours.

Symptoms include:

  • Bluish skin color (cyanosis)
  • Rapid breathing, which may occur with noises such as grunting
  • Flaring nostrils or movements between the ribs or breastbone known as retractions

Exams and Tests

The mother’s pregnancy and labor history are important to make the diagnosis.

Tests performed on the baby may include:

  • Blood count and blood culture to rule out infection
  • Chest x-ray to rule out other causes of breathing problems
  • Continuous monitoring of the baby's oxygen levels, breathing, and heart rate

The diagnosis of transient tachypnea is most often made after the baby is monitored for 1 or 2 days.

Treatment

Your baby will be given oxygen to keep the blood oxygen level stable. Your baby will often need the most oxygen within a few hours after birth. The baby's oxygen needs will begin to decrease after that. Most infants with transient tachypnea improve in less than 12 - 24 hours.

Very rapid breathing can cause the baby to feed poorly. Fluids and nutrients will be given through a vein until your baby improves. Your baby may also receive antibiotics until the health care provider is sure there is no infection. Rarely, babies with transient tachypnea will have lung problems that last for as long as a week or so.

Outlook (Prognosis)

The condition most often goes away within 24 - 48 hours after delivery. In most cases, babies who have had transient tachypnea have no further problems from the condition. They will not need special care or follow-up other than their routine checkups.

References

Dudell GG, Stoll BJ. Respiratory tract disorders. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 95.


Review Date: 10/29/2013
Reviewed By: Kimberly G Lee, MD, MSc, IBCLC, Associate Professor of Pediatrics, Division of Neonatology, Medical University of South Carolina, Charleston, SC. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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