Birth weight and lung functions in male adolescents

Kamal Jindal1, Farah Khaliq, Piyush Gupta

  • 1Department of Physiology, University College of Medical Sciences, Dilshad Garden, Delhi - 110 095. kamalucms@gmail.com

Insights

This study found no significant link between birth weight and adolescent lung function. While low birth weight children had slightly lower forced vital capacity, it may stem from infant factors, not prenatal ones.

Area of Science:

  • Pediatric Pulmonology
  • Developmental Pediatrics
  • Public Health

Background:

  • Birth weight is a critical indicator of fetal development.
  • Early life factors may influence long-term health outcomes, including respiratory health.
  • The Barker Hypothesis suggests intrauterine conditions impact adult disease risk.

Purpose of the Study:

  • To investigate the association between birth weight and lung function in adolescent males.
  • To determine if low birth weight (LBW) impacts adolescent lung capacity.
  • To evaluate the relevance of the Barker Hypothesis in this cohort.

Main Methods:

  • Retrospective cohort study of 70 adolescent males (12-16 years).
  • Subjects selected based on available birth records from nursing homes.
  • Lung function measured using a portable spirometer (DATOSPIR 120 B).

Main Results:

  • Forced vital capacity (FVC) was not significantly different between low birth weight and normal birth weight groups.
  • A trend towards lower mean FVC was observed in the LBW group (-0.19 ml).
  • No significant associations were found between birth weight and other lung function parameters.

Conclusions:

  • Birth weight at term did not show a significant association with adolescent lung function in this cohort.
  • Observed differences in FVC may be related to postnatal factors rather than intrauterine programming.
  • The findings do not support the Barker Hypothesis regarding intrauterine influences on adult disease risk.

Related Concept Videos

Lung Capacity01:47

Lung Capacity

The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures.
Pulmonary Function Tests01:25

Pulmonary Function Tests

Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
Signs of Puberty01:27

Signs of Puberty

Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Pressure Relationships in Thoracic Cavity01:24

Pressure Relationships in Thoracic Cavity

Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs during...
Respiratory Capacities01:24

Respiratory Capacities

Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...