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The lungs inflate, or fill with air, as you breathe. In the lungs, air travels through branching airways called bronchial tubes. These end in tiny sacs called alveoli. Sometimes alveoli rupture. This causes air to leak into the space between the lungs and the chest wall. These air leaks cause problems with breathing and can lead to lung damage.
Any baby can get an air leak. Air leaks may occur due to:
Being on a ventilator (breathing machine) for a breathing problem (the pressure of the air provided by the ventilator can cause alveoli to rupture)
Meconium aspiration syndrome, when an infant inhales a bit of meconium, or it's first feces, during or after labor. It causes the lungs to become irritated, damaged, and overinflated (filled with too much air)
Respiratory distress syndrome, a common problem in premature babies that is a result of immature lung development and causes trouble breathing
Vigorous crying, which causes the alveoli to rupture (some babies cry hard enough to do this at birth, or soon after)
Lung problems that require the baby to work harder to breathe
Congenital problems, such as an underdeveloped lung
Pulmonary interstitial emphysema (PIE): Tiny ruptures occur in the alveoli, allowing air to leak out into the lung tissue. This puts pressure on the surrounding alveoli. Too many of these tiny leaks can lead to the more severe problems such as collapsed lung (pneumothorax) or pneumomediastinum.
Pneumothorax: Air gets trapped between the chest wall and the lung. This trapped air puts pressure on the lung, preventing it from inflating. So, the baby has trouble breathing.
Pneumomediastinum: Air leaks into the chest, into the space between the two lungs.
Your baby’s treatment will depend on how severe the air leak is. If the baby is not having breathing problems, treatment probably isn’t needed. A small air leak may heal by itself. For more severe cases, treatments include:
A needle or catheter (small, flexible tube) is inserted into the space between the lungs and the chest wall. This is used to draw air out. This process helps remove the air that leaked out, so breathing can return to normal. If a lot of air leaked out, though, further treatment may be needed.
A chest tube is inserted into the space between the lungs and the chest wall. The chest tube is attached to a suction device that pulls out the trapped air, so the lungs can expand once again. This allows the tear to heal. (It may take a few days for the tear to heal. The chest tube will stay in during this time.)
The baby may need breathing support (such as supplemental oxygen or a ventilator) until the air leak heals.
In most cases, once an air leak is treated there are no lasting problems. If a chest tube must be used, rare complications such as internal bleeding or puncture of the lung could occur. Some babies with air leaks go on to have long-term breathing problems. The doctor can give you more information about your baby.
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