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Related Concept Videos

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...
Respiratory Volumes01:15

Respiratory Volumes

Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
Respiratory Volumes and Capacities I01:26

Respiratory Volumes and Capacities I

Assessing the respiratory rate and rhythm for a complete minute is crucial for evaluating the breathing pattern. Even a minor increase in the patient's average respiratory rate, by as little as three to five breaths per minute, is an early and vital indicator of respiratory distress. Patients with a respiratory rate exceeding twenty-four breaths per minute require close monitoring to determine the physiological alterations. This careful observation is essential for prompt recognition and...
Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

Physical assessment of the respiratory tract through inspection is a crucial step in understanding the patient's respiratory health. It provides insights into the functioning of the respiratory system, the musculoskeletal structure, and even the patient's nutritional status. This comprehensive approach involves observing several vital aspects: chest configuration, breathing patterns, respiratory rates, skin color, and use of accessory muscles.
Chest Configuration
The chest configuration can...
Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...
Assessment of Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:

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Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults
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Reference values for spirometry in preschool children.

Edjane F Burity1, Carlos A C Pereira, José A Rizzo

  • 1Pós-graduação em Saúde da Criança e do Adolescente, Universidade Federal de Pernambuco, Recife, PE, Brazil. edjaneburity@hotmail.com

Jornal De Pediatria
|June 25, 2013
PubMed
Summary
This summary is machine-generated.

This study derived new lung function reference values for preschool children in Brazil. Height and gender were found to significantly impact spirometry measures like forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1).

Keywords:
ChildCriançaEspirometriaLung function testsPreschoolPré-escolarReference valuesSpirometryTestes de função pulmonarValores de referência

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Area of Science:

  • Pediatric Pulmonology
  • Respiratory Physiology
  • Public Health

Background:

  • Lung function reference values vary globally, necessitating population-specific data.
  • Preschool children present unique challenges for accurate spirometry due to difficulties in obtaining full expiratory curves.

Purpose of the Study:

  • To establish reliable reference values for lung function tests in Brazilian preschool children.
  • To identify factors influencing spirometry measurements in this age group.

Main Methods:

  • A prospective study involving 425 preschool children (3-6 years) in a Brazilian metropolitan area.
  • Spirometry measurements included peak expiratory flow (PEF), forced vital capacity (FVC), forced expiratory volumes (FEV1, FEV0.50), and related ratios.
  • Regression analysis was used to define reference values, considering height and gender.

Main Results:

  • A total of 321 children completed the tests, with 135 (42.0%) providing acceptable spirometry curves.
  • Height and gender were significant predictors for forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1).
  • Both linear and logarithmic regression models were explored, with the linear model favored for simplicity.

Conclusions:

  • Obtaining complete expiratory curves in preschoolers remains challenging.
  • Gender, in addition to height, influences key spirometry parameters (FVC, FEV1) in this population.
  • The derived reference values are applicable to Brazilian preschool children and similar demographic groups.