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Related Concept Videos

Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure01:16

Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure

Oxygen therapy has emerged as a significant tool in enhancing the quality of life for patients suffering from pulmonary arterial hypertension (PAH). While this therapy has principally been studied on patients with significant hypoxemia, this therapeutic approach helps prevent potential organ damage and can be administered in the comfort of one's home.
Oxygen therapy is vital in increasing and maintaining blood oxygen levels in PAH patients. As a result, it aids in reducing fatigue, improving...
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 Delivering System I: Nasal Cannula and Face Mask01:26

Oxygen Delivering System I: Nasal Cannula and Face Mask

The human body requires oxygen to function, and when the natural process of respiration is hindered, external devices, including the following, are needed to help deliver this vital gas.
Nasal Cannula
A nasal cannula is a lightweight tube split at one end into two prongs and placed in the nostrils. It is typically used to deliver low to medium levels of oxygen.
Suggested flow rate: The suggested flow rate for a nasal cannula typically ranges between 1 and 6 L/min.
Oxygen percentage setting:...
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...
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...
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,...

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Related Experiment Video

Updated: May 13, 2026

Supramaximal Intensity Hypoxic Exercise and Vascular Function Assessment in Mice
10:00

Supramaximal Intensity Hypoxic Exercise and Vascular Function Assessment in Mice

Published on: March 15, 2019

Are oxygen-conserving devices effective for correcting exercise hypoxemia?

Sergi Martí1, Virginia Pajares, Fátima Morante

  • 1Pulmonology Department, Hospital Universitari Vall d'Hebron, and the Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain, and with the Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, Spain.

Respiratory Care
|March 21, 2013
PubMed
Summary

Oxygen-conserving devices effectively treat exercise hypoxemia in COPD and ILD patients. However, individualized oxygen flow adjustments are crucial for optimal results, especially with demand oxygen delivery systems in ILD.

Keywords:
COPDconserversexercise testinterstitial lung diseaseoxygen inhalation therapytechnology assessment

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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

Integration of Brain Tissue Saturation Monitoring in Cardiopulmonary Exercise Testing in Patients with Heart Failure
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Integration of Brain Tissue Saturation Monitoring in Cardiopulmonary Exercise Testing in Patients with Heart Failure

Published on: October 1, 2019

Related Experiment Videos

Last Updated: May 13, 2026

Supramaximal Intensity Hypoxic Exercise and Vascular Function Assessment in Mice
10:00

Supramaximal Intensity Hypoxic Exercise and Vascular Function Assessment in Mice

Published on: March 15, 2019

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

Integration of Brain Tissue Saturation Monitoring in Cardiopulmonary Exercise Testing in Patients with Heart Failure
04:20

Integration of Brain Tissue Saturation Monitoring in Cardiopulmonary Exercise Testing in Patients with Heart Failure

Published on: October 1, 2019

Area of Science:

  • Pulmonary Medicine
  • Respiratory Physiology

Background:

  • Exercise hypoxemia is a significant challenge in advanced lung diseases like COPD and ILD.
  • Oxygen-conserving devices (OCDs) offer potential benefits but require efficacy validation.
  • This study evaluates two OCDs: demand oxygen delivery (DOD) and pendant reservoir cannula (PRC).

Purpose of the Study:

  • To compare the efficacy of DOD and PRC systems against continuous flow nasal cannula (CFNC) for correcting exercise hypoxemia.
  • To assess the effectiveness of OCDs in patients with Chronic Obstructive Pulmonary Disease (COPD) and Interstitial Lung Disease (ILD).

Main Methods:

  • A crossover study involving 28 COPD and 31 ILD patients with exercise-induced oxygen desaturation (average SpO2 < 88%).
  • Participants performed three 6-minute walk tests using CFNC, DOD, and PRC in random order.
  • Resaturation criterion was set at an average SpO2 ≥ 90%.

Main Results:

  • Both DOD and PRC corrected exercise hypoxemia in a majority of COPD and ILD subjects.
  • Efficacy rates for COPD: CFNC (79%), DOD (79%), PRC (86%).
  • Efficacy rates for ILD: CFNC (77%), DOD (61%), PRC (81%). DOD showed lower performance in ILD patients (P = .01).

Conclusions:

  • OCDs successfully corrected exercise hypoxemia in most COPD and ILD patients.
  • Approximately 20% of severe COPD patients and nearly 40% of ILD patients using DOD did not achieve adequate hypoxemia correction.
  • Individualized oxygen titration is essential for optimal hypoxemia management, particularly when using DOD in ILD patients.