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Related Concept Videos

Hypoxia01:23

Hypoxia

1.7K
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...
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Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

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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:
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Acute Respiratory Failure-I01:21

Acute Respiratory Failure-I

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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,...
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Acute Respiratory Failure-III01:30

Acute Respiratory Failure-III

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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...
662
Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

457
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...
457
Pneumothorax-I01:26

Pneumothorax-I

1.0K
A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.
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Related Experiment Video

Updated: Dec 24, 2025

The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia
08:47

The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia

Published on: November 19, 2008

36.2K

[Asphyxia and hypoxic-ischaemic encephalopathy].

Ted Carl Kejlberg Andelius1, Kasper Jacobsen Kyng, Christian Heiring

  • 1ted.andelius@clin.au.dk.

Ugeskrift for Laeger
|April 15, 2020
PubMed
Summary
This summary is machine-generated.

Hypoxic-ischaemic encephalopathy (HIE) is a major cause of newborn death and disability. While therapeutic hypothermia helps, new treatments and better diagnostic tools are needed to improve outcomes for affected infants.

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A Piglet Model of Neonatal Hypoxic-Ischemic Encephalopathy
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Early Pathological and Magnetic Resonance Detection of Cerebral Injury Using a Rat Model of Neonatal Hypoxic Ischemic Encephalopathy
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Early Pathological and Magnetic Resonance Detection of Cerebral Injury Using a Rat Model of Neonatal Hypoxic Ischemic Encephalopathy

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Last Updated: Dec 24, 2025

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Published on: October 28, 2022

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Area of Science:

  • Neonatal neurology
  • Perinatal medicine
  • Neurocritical care

Background:

  • Hypoxic-ischaemic encephalopathy (HIE) is a significant cause of mortality and long-term disability in newborns worldwide.
  • Brain injury from perinatal insults is a progressive process, offering a window for therapeutic intervention.
  • Current treatments, including therapeutic hypothermia, have limitations, with many newborns experiencing adverse outcomes.

Purpose of the Study:

  • To review the dynamic nature of brain damage in neonatal hypoxic-ischaemic encephalopathy.
  • To discuss the potential for interventions targeting the evolving injury process.
  • To highlight the need for improved prognostic and diagnostic tools and novel therapeutic strategies.

Main Methods:

  • This review synthesizes current knowledge on the pathophysiology of HIE.
  • It examines the efficacy and limitations of existing treatments, primarily therapeutic hypothermia.
  • The review discusses methods for prognostic evaluation, including clinical and paraclinical investigations.

Main Results:

  • Therapeutic hypothermia is the sole established treatment for HIE but does not guarantee favorable outcomes.
  • A substantial proportion of newborns treated with hypothermia continue to suffer adverse neurological consequences.
  • Clinical examination and paraclinical investigations are currently used for prognosis assessment.

Conclusions:

  • Despite therapeutic hypothermia, significant challenges remain in managing HIE and improving infant outcomes.
  • There is a critical need for the development of novel therapeutic agents to target HIE.
  • Enhanced diagnostic and prognostic tools are essential to better guide clinical management and predict neurological outcomes in HIE survivors.