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Related Concept Videos

Pulmonary Function Tests01:25

Pulmonary Function Tests

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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...
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Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

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Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
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Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

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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...
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Respiratory System Abnormal Finding II: Palpation and Auscultation01:31

Respiratory System Abnormal Finding II: Palpation and Auscultation

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In assessing respiratory abnormalities, palpation and auscultation are critical tools for detecting and interpreting various pathophysiological changes. These techniques provide insight into underlying disorders by evaluating tactile sensations and sounds produced by the respiratory system.
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Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

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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.
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Respiratory System Abnormal Finding I: Inspection and Percussion01:30

Respiratory System Abnormal Finding I: Inspection and Percussion

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Respiratory system abnormalities are a significant concern in healthcare due to their potential to indicate underlying severe conditions like Chronic Obstructive Pulmonary Disease (COPD), asthma, and pneumonia. These abnormalities can often be detected through physical examination methods like inspection and percussion.
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Related Experiment Video

Updated: Nov 5, 2025

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
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Swimming-induced changes in pulmonary function: special observations for clinical testing.

Marja Päivinen1,2, Kari Keskinen3, Heikki Tikkanen4

  • 1University of Turku, Turku, Finland. marja.paivinen@utu.fi.

BMC Sports Science, Medicine & Rehabilitation
|May 21, 2021
PubMed
Summary

Elite swimmers experience more respiratory symptoms at high intensities. Pulmonary function tests in water show sex-based differences and higher ventilation than typical clinical targets, suggesting modified testing protocols are needed.

Keywords:
ExercisePulmonary functionSpirometrySwimming

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Area of Science:

  • Sports Medicine
  • Pulmonary Physiology
  • Environmental Exercise Science

Background:

  • Swimmers often exhibit improved pulmonary function, but airway reactivity in water differs from land-based testing.
  • The aquatic environment and swimming may alter pulmonary responses compared to traditional exercise assessments.
  • Understanding these unique physiological responses is crucial for accurate evaluation.

Purpose of the Study:

  • To investigate the combined effects of the aquatic environment and swimming on pulmonary function.
  • To correlate pulmonary function changes with perceived respiratory symptoms in swimmers.
  • To assess if standard clinical testing parameters are applicable to elite swimmers in water.

Main Methods:

  • 412 competitive swimmers completed surveys on respiratory symptoms during various swimming intensities.
  • Pulmonary function tests (spirometry, MVV) were conducted on 14 elite swimmers on land and in water.
  • Minute ventilation (VE), tidal volume (VT), and breathing frequency (fb) were measured during high-intensity swimming.

Main Results:

  • Most respiratory symptoms were reported at competition-speed swimming intensity.
  • A decrease in FEV1/FVC ratio was observed transitioning from land to water (5.3% in females, 2.2% in males).
  • During intense swimming, minute ventilation reached 72% (females) and 75% (males) of calculated MVV.

Conclusions:

  • Significant sex differences in spirometry exist between land and water measurements for swimmers.
  • Ventilation during symptom-triggering intensities was ~20% higher than clinical testing targets.
  • Clinical testing protocols for elite swimmers may require specific modifications for aquatic environments.