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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...
Oxygen Transport in the Blood01:27

Oxygen Transport in the Blood

Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
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:
Respiratory Assessment: Purpose and Indications01:19

Respiratory Assessment: Purpose and Indications

Respiratory assessment is a cornerstone of nursing assessments, crucial for the early detection of patient deterioration. This evaluation transcends routine procedures, representing a critical skill nurses must master to ensure optimal patient care.
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...
Physiological Control of Respiration01:23

Physiological Control of Respiration

Introduction
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...
Respiration and Gaseous Exchange01:20

Respiration and Gaseous Exchange

The intricate interplay between the cardiovascular and respiratory systems is crucial for efficiently transporting respiratory gases throughout the body. Let us explore the cardiovascular system's multifaceted functions, emphasizing its pivotal role in gas exchange.
Respiration involves the exchange of gases, especially oxygen (O2) and carbon dioxide (CO2), between the alveoli and body cells, a process facilitated by blood circulation. As a result, the cardiovascular system, which involves the...

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Related Experiment Video

Updated: Jun 10, 2026

Induction of Hypoxia in Living Frog and Zebrafish Embryos
08:01

Induction of Hypoxia in Living Frog and Zebrafish Embryos

Published on: June 26, 2017

Concepts in hypoxia reborn.

Daniel S Martin1, Maryam Khosravi, Mike Pw Grocott

  • 1Centre for Altitude, Space and Extreme Environment Medicine, Portex Unit, University College London Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK. dan.s.martin@gmail.com

Critical Care (London, England)
|August 24, 2010
PubMed
Summary
This summary is machine-generated.

The developing fetus experiences significant hypoxia, influencing adult oxygen tolerance. Understanding fetal adaptations to low oxygen could lead to new treatments for hypoxemia in adults and high-altitude dwellers.

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Delivery of In Vivo Acute Intermittent Hypoxia in Neonatal Rodents to Prime Subventricular Zone-derived Neural Progenitor Cell Cultures
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Delivery of In Vivo Acute Intermittent Hypoxia in Neonatal Rodents to Prime Subventricular Zone-derived Neural Progenitor Cell Cultures

Published on: November 2, 2015

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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Last Updated: Jun 10, 2026

Induction of Hypoxia in Living Frog and Zebrafish Embryos
08:01

Induction of Hypoxia in Living Frog and Zebrafish Embryos

Published on: June 26, 2017

Delivery of In Vivo Acute Intermittent Hypoxia in Neonatal Rodents to Prime Subventricular Zone-derived Neural Progenitor Cell Cultures
05:45

Delivery of In Vivo Acute Intermittent Hypoxia in Neonatal Rodents to Prime Subventricular Zone-derived Neural Progenitor Cell Cultures

Published on: November 2, 2015

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

Area of Science:

  • Physiology
  • Perinatal Medicine
  • Altitude Medicine

Background:

  • The human fetus develops in a significantly hypoxic intrauterine environment.
  • This in utero hypoxia is more profound than typically experienced in adult life, except in critical illness or at high altitudes.
  • Physiological foundations are established under these low-oxygen conditions.

Purpose of the Study:

  • To investigate the profound effect of the hypoxic intrauterine environment on human tolerance to hypoxia.
  • To explore the potential manipulation of fetal cellular mechanisms for adult hypoxemic stress survival.
  • To identify strategies for managing severe hypoxemia in adults and high-altitude adaptation.

Main Methods:

  • Comparative analysis of fetal and adult oxygen levels.
  • Review of cellular mechanisms for maintaining tissue oxygenation under hypoxia.
  • Exploration of fetal adaptations to intrauterine hypoxia.

Main Results:

  • Fetal arterial oxygen levels are comparable to those recorded at extreme altitudes.
  • Cellular mechanisms in fetuses focus on modifying oxygen consumption to maintain tissue oxygenation.
  • These fetal mechanisms may offer a survival advantage in severe hypoxemic stress.

Conclusions:

  • The hypoxic intrauterine environment significantly impacts human tolerance to hypoxia.
  • Manipulating fetal-derived cellular mechanisms could offer new clinical strategies for hypoxemia.
  • Studying fetal hypoxia adaptation and high-altitude physiology may unlock novel treatments for oxygen deprivation.