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Structural and Functional Changes in the Preterm Lung

  • Shu WuEmail author
  • Eduardo Bancalari
Chapter
  • 686 Downloads
Part of the Respiratory Medicine book series (RM)

Abstract

Preterm infants, particularly those with bronchopulmonary dysplasia (BPD), experience long-term structural and functional pulmonary changes. BPD is a chronic lung disease of premature infants that results from a developmental arrest of the immature lung caused by multiple injurious factors such as mechanical ventilation, oxygen exposure, and prenatal or postnatal infections. Over the last 40 years, the survival of preterm infants with BPD has significantly increased due to the improvements in neonatal intensive care and in respiratory support. Many of the early BPD survivors are now well into their adulthood, and this is providing new information on the long-term respiratory outcomes, both structural and functional, in these former preterm infants. Increasing evidence from clinical and research data indicate that survivors of preterm birth and particularly those with BPD have prolonged abnormalities in their lung structure, imaging studies, and lung function. This population is at a greater risk for rehospitalizations due to respiratory illnesses, often being admitted into pediatric intensive care units. It is also likely that BPD survivors may have a reduced ability to reach their peak lung function at young adulthood and may have an accelerated decline in function with aging. Increasing evidence suggests that even infants without BPD and late-preterm infants are at increased risk for acute and chronic respiratory morbidities. This chapter provides a brief overview of normal lung developmental processes, BPD pathogenesis, and long-term respiratory outcomes, including structural and functional changes, in preterm survivors.

Keywords

Preterm infants Lung development Bronchopulmonary dysplasia Lung injury Oxygen toxicity Mechanical ventilation Respiratory symptoms Persistent structural abnormalities Persistent radiographic abnormalities Abnormal lung function 

Abbreviations

BPD

Bronchopulmonary dysplasia

CPAP

Continuous positive airway pressure

CTGF

Connective tissue growth factor

COPD

Chronic obstructive pulmonary disease

DLco

Carbon monoxide diffusing capacity

FEV1

Forced expiratory volume in 1 s

FEV75

FEV at 75 % of expired FVC

FRC

Functional residual capacity

FVC

Forced vital capacity

HRCT

High-resolution computed tomography

IL-1β

Interleukin-1beta

IL-1RA

IL-1 receptor antagonist

RSV

Respiratory syncytial virus

RV

Residual volume

TGF-β

Transforming growth factor beta

Th1

T-helper cytokines 1

TTN

Transient tachypnea of newborn

VA

Alveolar volume

VO2max

Oxygen uptake at maximal exercise

VEGF

Vascular endothelial growth factor

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Department of Pediatrics/Division of NeonatologyUniversity of Miami School of Medicine, Batchelor Children’s Research InstituteMiamiUSA
  2. 2.Department of Pediatrics/Division of NeonatologyUniversity of Miami School of MedicineMiamiUSA

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