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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,...
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...
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...
Chemical Factors Affecting Respiration Centers01:31

Chemical Factors Affecting Respiration Centers

Chemical factors such as changing CO2, O2, and H+ levels in arterial blood play a critical role in influencing respiration depth and rates. These variations are detected by chemoreceptors—specialized sensors located in two primary body areas. Central chemoreceptors are found throughout the brain stem, including the ventrolateral medulla, while peripheral chemoreceptors are located in the aortic arch and carotid arteries.
CO2 has a potent influence on respiration and is strictly regulated. Under...
Carbon Dioxide Transport in the Blood01:19

Carbon Dioxide Transport in the Blood

Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...

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Retinal Vascular Reactivity as Assessed by Optical Coherence Tomography Angiography
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Retinal Vascular Reactivity as Assessed by Optical Coherence Tomography Angiography

Published on: March 26, 2020

Hyperbaric oxygen for carbon monoxide poisoning.

Nick A Buckley1, David N Juurlink, Geoff Isbister

  • 1Professorial Medicine Unit, POWH Clinical School, University of NSW, South Wing, Edmund Blackett building, Prince of Wales Hospital, Randwick, NSW, Australia, 2031.

The Cochrane Database of Systematic Reviews
|April 15, 2011
PubMed
Summary
This summary is machine-generated.

Current randomized trials do not confirm if hyperbaric oxygen (HBO) prevents neurological sequelae in carbon monoxide (CO) poisoning. More research is needed to determine HBO's role in CO poisoning treatment.

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Area of Science:

  • Emergency Medicine
  • Toxicology
  • Hyperbaric Medicine

Background:

  • Carbon monoxide (CO) poisoning is a significant global health concern.
  • Non-randomized studies suggest hyperbaric oxygen (HBO) may prevent neurological sequelae.
  • HBO is widely used for CO poisoning despite limited high-quality evidence.

Purpose of the Study:

  • To evaluate the efficacy of hyperbaric oxygen (HBO) versus normobaric oxygen (NBO) in preventing neurological sequelae after acute carbon monoxide poisoning.
  • To synthesize evidence from randomized controlled trials (RCTs).

Main Methods:

  • Systematic search of multiple electronic databases (Cochrane, MEDLINE, EMBASE, Web of Science) up to June 2010.
  • Inclusion of all RCTs comparing HBO and NBO in non-pregnant adults with acute CO poisoning.
  • Independent data extraction on patient numbers, interventions, and neurological outcomes.

Main Results:

  • Six RCTs involving 1361 participants were analyzed.
  • Pooled meta-analysis did not show a significant benefit of HBO for reducing neurological deficits (OR 0.78, 95%CI 0.54 to 1.12).
  • Significant heterogeneity, methodological flaws, and potential biases were noted in the included trials.

Conclusions:

  • Existing RCTs do not establish the effectiveness of HBO in reducing adverse neurological outcomes in CO poisoning.
  • Further multi-center RCTs are required to clarify the role of HBO in managing CO poisoning.