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Related Concept Videos

Hypoxia01:23

Hypoxia

Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
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-I01:21

Acute Respiratory Failure-I

Acute respiratory failure is a condition characterized by the inability of the lungs to perform their primary function: gas exchange. This failure leads to insufficient oxygen levels (hypoxemia) in the blood, elevated carbon dioxide levels (hypercapnia), or both, causing critical impairment in organ function.
Definition: It is defined by specific criteria based on blood gas measurements. Hypoxemia happens when the partial pressure of oxygen (PaO2) falls below 60 mmHg. At the same time,...
Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
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: May 24, 2026

A Model to Simulate Clinically Relevant Hypoxia in Humans
09:54

A Model to Simulate Clinically Relevant Hypoxia in Humans

Published on: December 22, 2016

A case of unexplained hypoxemia.

Poul Henning Madsen1, Søren Hess, Helle Dall Madsen

  • 1Department of Respiratory Medicine, Odense University Hospital, Odense, Denmark. phmadsen@dadlnet.dk

Respiratory Care
|March 16, 2012
PubMed
Summary
This summary is machine-generated.

Hepatopulmonary syndrome, a lung complication of liver disease, caused severe hypoxemia in a patient. Liver transplantation is the only effective treatment for this condition.

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Last Updated: May 24, 2026

A Model to Simulate Clinically Relevant Hypoxia in Humans
09:54

A Model to Simulate Clinically Relevant Hypoxia in Humans

Published on: December 22, 2016

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13:13

Biochemical Measurement of Neonatal Hypoxia

Published on: August 24, 2011

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Continuous Video Electroencephalogram during Hypoxia-Ischemia in Neonatal Mice

Published on: June 11, 2020

Area of Science:

  • Pulmonology
  • Hepatology
  • Internal Medicine

Background:

  • Hepatopulmonary syndrome (HPS) is a serious complication of chronic liver disease.
  • It is characterized by abnormal intrapulmonary vasodilation leading to impaired gas exchange.

Observation:

  • A patient presented with acute dyspnea and severe, unexplained hypoxemia.
  • Initial investigations ruled out common cardiopulmonary causes like pulmonary embolism or hypertension.

Findings:

  • The patient was diagnosed with hepatopulmonary syndrome due to underlying alcoholic liver disease.
  • Diagnostic findings included a widened alveolar-arterial oxygen difference and confirmed intrapulmonary vascular dilations.

Implications:

  • This case underscores the importance of considering non-thoracic conditions in patients with respiratory distress.
  • Liver transplantation is the definitive treatment for severe hepatopulmonary syndrome, offering the only documented efficacy.