Oxygen toxicity: Difference between revisions
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[[File:Human_eye_cross_section_detached_retina.svg|thumb|right|Detached retina, a potential complication of oxygen toxicity.]] | |||
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'''Oxygen toxicity''' is a condition resulting from the harmful effects of breathing molecular oxygen (O<sub>2</sub>) at increased partial pressures. It is also known as oxygen poisoning or oxygen intoxication. The condition can affect the central nervous system, lungs, and eyes, and is a concern in medical, diving, and space environments. | '''Oxygen toxicity''' is a condition resulting from the harmful effects of breathing molecular oxygen (O<sub>2</sub>) at increased partial pressures. It is also known as oxygen poisoning or oxygen intoxication. The condition can affect the central nervous system, lungs, and eyes, and is a concern in medical, diving, and space environments. | ||
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==Clinical Manifestations== | ==Clinical Manifestations== | ||
[[File:Robert_W_Hamilton_Jr.png|thumb|left|Robert W. Hamilton Jr., contributed to the understanding of oxygen toxicity in diving.]] | |||
===Central Nervous System=== | ===Central Nervous System=== | ||
CNS oxygen toxicity is characterized by symptoms such as: | CNS oxygen toxicity is characterized by symptoms such as: | ||
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===Ocular Effects=== | ===Ocular Effects=== | ||
Oxygen toxicity can also affect the eyes, leading to conditions such as retinopathy of prematurity (ROP) in infants. | Oxygen toxicity can also affect the eyes, leading to conditions such as retinopathy of prematurity (ROP) in infants. | ||
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==Notable Figures== | ==Notable Figures== | ||
* [[Paul Bert]]: Pioneered the study of oxygen toxicity. | * [[Paul Bert]]: Pioneered the study of oxygen toxicity. | ||
* [[Robert W. Hamilton Jr.]]: Made significant contributions to the understanding of oxygen toxicity in diving. | * [[Robert W. Hamilton Jr.]]: Made significant contributions to the understanding of oxygen toxicity in diving. | ||
Revision as of 21:08, 21 February 2025
Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen (O2) at increased partial pressures. It is also known as oxygen poisoning or oxygen intoxication. The condition can affect the central nervous system, lungs, and eyes, and is a concern in medical, diving, and space environments.
History
The phenomenon of oxygen toxicity was first described by Paul Bert, a French physiologist, in the 19th century. Bert demonstrated that breathing oxygen at high pressures could lead to convulsions and other symptoms. His work laid the foundation for understanding the effects of oxygen at elevated pressures.
Mechanism
Oxygen toxicity occurs when the partial pressure of oxygen exceeds the body's ability to manage reactive oxygen species (ROS). These ROS can cause damage to cell membranes, proteins, and DNA. The primary mechanisms include:
- Central Nervous System (CNS) Toxicity: Also known as the "Paul Bert effect," CNS toxicity can lead to symptoms such as visual disturbances, nausea, twitching, irritability, and seizures.
- Pulmonary Toxicity: Also known as the "Lorrain Smith effect," this occurs with prolonged exposure to elevated oxygen levels, leading to symptoms such as coughing, difficulty breathing, and pulmonary edema.
Pathophysiology
The pathophysiology of oxygen toxicity involves oxidative stress, where an imbalance between the production of ROS and the body's ability to detoxify these reactive intermediates leads to cellular damage. Lipid peroxidation, protein oxidation, and DNA damage are critical processes in the development of oxygen toxicity.
Clinical Manifestations
Central Nervous System
CNS oxygen toxicity is characterized by symptoms such as:
- Visual disturbances
- Nausea
- Twitching
- Irritability
- Dizziness
- Seizures
Pulmonary System
Pulmonary oxygen toxicity can manifest as:
- Coughing
- Chest pain
- Shortness of breath
- Pulmonary edema
Ocular Effects
Oxygen toxicity can also affect the eyes, leading to conditions such as retinopathy of prematurity (ROP) in infants.
Prevention and Management
Preventing oxygen toxicity involves controlling the partial pressure of oxygen in breathing gases. In diving, this is managed by using gas mixtures with lower oxygen content, such as nitrox or trimix. In medical settings, careful monitoring of oxygen therapy is essential.
Notable Figures
- Paul Bert: Pioneered the study of oxygen toxicity.
- Robert W. Hamilton Jr.: Made significant contributions to the understanding of oxygen toxicity in diving.
