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Related Concept Videos

Factors Affecting Respiration01:24

Factors Affecting Respiration

Respiration is a crucial physiological function involving exchanging oxygen (O2) and carbon dioxide (CO2) between an organism and its environment. Various factors can impact this essential process:
Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
Acute Respiratory Failure-III01:30

Acute Respiratory Failure-III

Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without causing...
Atelectasis II: Pathophysiology01:10

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...
Hyperpnea and Hyperventilation01:25

Hyperpnea and Hyperventilation

Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...

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Related Experiment Video

Updated: Jun 6, 2026

Simplified Whole Body Plethysmography to Characterize Lung Function During Respiratory Melioidosis
07:27

Simplified Whole Body Plethysmography to Characterize Lung Function During Respiratory Melioidosis

Published on: February 24, 2023

ENT morbidity at high altitude.

B K Prasad1

  • 1Department of ENT and Head and Neck Surgery, Command Hospital (Eastern Command (EC)), Kolkata, West Bengal, India. bipin_rupa@rediffmail.com

The Journal of Laryngology and Otology
|November 18, 2010
PubMed
Summary
This summary is machine-generated.

High altitude environments cause unique ear, nose, and throat (ENT) problems, including barotrauma and frostbite. Health education for troops is crucial to prevent these common high-altitude ENT issues.

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Last Updated: Jun 6, 2026

Simplified Whole Body Plethysmography to Characterize Lung Function During Respiratory Melioidosis
07:27

Simplified Whole Body Plethysmography to Characterize Lung Function During Respiratory Melioidosis

Published on: February 24, 2023

Area of Science:

  • Environmental Medicine
  • Otolaryngology

Background:

  • High altitude environments present unique health challenges due to factors like elevation, hypoxia, and extreme cold.
  • These conditions can lead to specific health issues, particularly affecting the ear, nose, and throat (ENT).

Purpose of the Study:

  • To evaluate the incidence and types of ENT morbidity in individuals exposed to high altitude.
  • To identify common ENT conditions prevalent in high-altitude settings.

Main Methods:

  • Examination of soldiers newly introduced to high altitude with ENT symptoms.
  • Assessment of patients undergoing hyperbaric therapy, tracheostomy, or cold injury treatment for ENT problems.

Main Results:

  • High incidence of otic and sinus barotrauma, vertigo, and epistaxis (nosebleeds).
  • Significant cases of pinna frostbite and barotrauma related to hyperbaric chamber therapy.
  • Numerous cases of high altitude pharyngitis observed.

Conclusions:

  • ENT diseases are a significant contributor to illness in high-altitude populations.
  • Effective health education for military personnel is essential to mitigate these ENT health risks.