How does surfactant affect premature babies?

Premature infants may be born before their lungs make enough surfactant. Low amounts of surfactant lead to poor lung function. This results in stiff, collapsible lungs and increased fluid in the lungs, making it hard work to breathe.

Why is RDS a factor in premature babies?

RDS is more common in premature newborns because their lungs are not able to make enough surfactant. Surfactant is a foamy substance that keeps the lungs fully expanded so that newborns can breathe in air once they are born. Without enough surfactant, the lungs collapse and the newborn has to work hard to breathe.

Which is the major phospholipid present in the surfactant given to a preterm baby?

Respiratory Distress in the Preterm Infant Pulmonary surfactant is composed of approximately 90% lipids and 10% proteins. The main phospholipid in surfactant is dipalmitoylphosphatidylcholine (DPPC), also known as lecithin. It is surface active because of its hydrophilic head and hydrophobic tails (Figure 46-7).

Which phospholipid is deficient in respiratory distress syndrome?

Respiratory distress syndrome is caused by a deficiency of surfactant, a phospholipid responsible for stabilizing alveolar surfaces and reducing surface tension. Surfactant is 70% lipid (phosphatidylcholine) combined with proteins.

What is the role of surfactant in neonatal lung development?

The surfactant mixture is an essential group of molecules to support air breathing. Thus, preterm infants, who are born with immature lungs and are surfactant deficient, develop respiratory distress syndrome after being born.

What happens if surfactant is absent in the lungs?

Without normal surfactant, the tissue surrounding the air sacs in the lungs (the alveoli) sticks together (because of a force called surface tension) after exhalation, causing the alveoli to collapse.

Why RDS is called hyaline membrane disease?

The word “hyaline” comes from the Greek word “hyalos” meaning “glass or transparent stone such as crystal.” The membrane in hyaline membrane disease looks glassy. Hyaline membrane disease is now commonly called respiratory distress syndrome (RDS). It is caused by a deficiency of a molecule called surfactant.

Which premature babies are at risk for RDS?

Which premature babies are at risk for RDS?

• The baby is a boy or is white.
• The baby has a sibling born with RDS.
• C-section (Cesarean) delivery, especially without labor.
• The baby doesn’t get enough oxygen just before, during, or after birth (perinatal asphyxia)

At what gestational age is surfactant produced?

Surfactant is made by the cells in the airways and consists of phospholipids and protein. It begins to be produced in the fetus at about 24 to 28 weeks of pregnancy, and is found in amniotic fluid between 28 and 32 weeks. By about 35 weeks gestation, most babies have developed adequate amounts of surfactant.

Which phospholipid acts as surfactant?

Phospholipid acting as surfactant is Lecithin.

Which surfactant cause respiratory distress syndrome?

Mutations in the genes encoding the surfactant proteins B and C (SP-B and SP-C) and the phospholipid transporter, ABCA3, are associated with respiratory distress and interstitial lung disease (9).

What role does surfactant play in preventing respiratory distress in premature infants?

First, surfactant decreases the pressure of the atmosphere on alveoli. During inhalation, the alveoli expand, and during exhalation, they collapse inwards. Without surfactant, the inner tissue of the alveoli sticks together during exhalation, causing the alveoli to collapse and preventing gas exchange.