What happens as a result of insufficient surfactant?

Surfactant enables the lungs to expand more easily. Without surfactant, the air sacs in the lungs, also called alveoli, collapse very easily. This collapse leads to decreased amounts of air in the lungs. The lack of surfactant combined with alveolar collapse makes it very difficult for the infant to breathe.

What is the function of surfactant in the lungs?

Function. The main functions of surfactant are as follows: (1) lowering surface tension at the air–liquid interface and thus preventing alveolar collapse at end-expiration, (2) interacting with and subsequent killing of pathogens or preventing their dissemination, and (3) modulating immune responses.

Does surfactant increase lung capacity?

Pulmonary surfactant thus greatly reduces surface tension, increasing compliance allowing the lung to inflate much more easily, thereby reducing the work of breathing. It reduces the pressure difference needed to allow the lung to inflate.

How is surfactant dysfunction treated?

There is no specific treatment for surfactant deficiencies. Corticosteroids, certain types of antibiotics, and medicines that aim to reduce inflammation may be used.

When do premature babies get surfactant?

Artificial surfactant. This helps the most if it is started in the first 6 hours of birth. Surfactant replacement may help make RDS less serious. It is given as preventive treatment for some babies at very high risk for RDS.

What is the most important function of surfactant?

The main function of surfactant is to lower the surface tension at the air/liquid interface within the alveoli of the lung. This is needed to lower the work of breathing and to prevent alveolar collapse at end-expiration.

What does surfactant do and why is it important?

The main purpose of the surfactants is to decrease the surface and interfacial tension and stabilize the interface.

What happens with too much surfactant?

When too much surfactant is released from the alveolar cells, or when the lung fails to remove the surfactant, gas exchange is greatly hindered and the symptoms of alveolar proteinosis occur.

What increases pulmonary surfactant?

Surfactant protein C (SP-C) is a highly hydrophobic protein that enhances the surface tension-lowering properties of pulmonary surfactant.

What causes surfactant deficiency in infants?

The etiology of surfactant deficiency in preterm infants is pulmonary immaturity and inadequate production.

What results from an insufficient production of surfactant in the pulmonary alveoli leading to alveolar collapse?

Insufficient surfactant leads to reduced pulmonary compliance and increased surface tension [2,3]. This results in increased risk of alveoli collapse at expiration followed by reduction in total surface area for gaseous exchange, as well as the alveolar-capillary diffusion capacity. Hypoxia and hypercapnia develops.