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Related Concept Videos

Pulmonary Function Tests01:25

Pulmonary Function Tests

1.1K
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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Lung Capacity01:47

Lung Capacity

58.1K
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.
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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...
1.3K

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Related Experiment Video

Updated: Apr 11, 2026

Phenotyping Mouse Pulmonary Function In Vivo with the Lung Diffusing Capacity
07:13

Phenotyping Mouse Pulmonary Function In Vivo with the Lung Diffusing Capacity

Published on: January 6, 2015

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Baron Munchhausen's lung function expertise.

Thomas Rothe1, Raschid Gharbo1, Mark Däppen2

  • 1Zürcher Höhenklinik Davos, Dept. of Internal Medicine & Pneumology, CH - 7272 Davos Clavadel, Switzerland.

Respiratory Medicine Case Reports
|June 2, 2015
PubMed
Summary
This summary is machine-generated.

This case study highlights a patient with anorexia nervosa and asthma whose lung function tests mimicked severe airway obstruction due to self-induced maneuvers, suggesting Munchausen syndrome.

Keywords:
AsthmaFEV1 (forced expiratory volume in the first second)Lung function testMunchhausen's syndromePsychosomatic disorder

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Area of Science:

  • Pulmonology
  • Psychiatry

Background:

  • Asthma is a chronic respiratory condition often exacerbated by various factors.
  • Anorexia nervosa is an eating disorder with complex physiological manifestations.
  • Refractory asthma requires thorough differential diagnosis to rule out non-organic causes.

Purpose of the Study:

  • To investigate an unusual case of asthma refractory to treatment.
  • To explore the potential role of factitious disorder in respiratory symptom presentation.
  • To identify diagnostic clues for Munchausen syndrome in patients with respiratory complaints.

Main Methods:

  • Case report of a young woman with anorexia nervosa and childhood asthma.
  • Pulmonary function testing, including body plethysmography.
  • Analysis of lung function patterns during repeated maneuvers.

Main Results:

  • The patient exhibited significantly increased expiratory resistance during pulmonary function tests.
  • Inspiratory resistance remained normal, and expiratory resistance varied, with normal readings in some maneuvers.
  • The observed pattern was consistent with self-induced airway obstruction by manipulating the spirometer mouthpiece.

Conclusions:

  • The findings suggest a case of Munchausen syndrome superimposed on established asthma.
  • Self-induced airway obstruction can mimic severe, treatment-refractory asthma.
  • Consideration of Munchausen syndrome is crucial in diagnosing refractory asthma, particularly in healthcare professionals.