Carbon Dioxide, Narcosis, and Diving
ثبت نشده
چکیده
Carbon dioxide (CO2) is the gaseous end product of the aerobic metabolism of oxygen. CO2 is highly soluble in body tissues, and readily diffuses from cells to blood, where circulation transports it to the lungs for elimination. Divers often ignore carbon dioxide, as CO2 is a normal part of life. However, CO2 may have definite and detrimental effects if a diver accumulates an excessive amount of CO2. Understanding how CO2 can become elevated, the symptoms, and the consequences of elevated CO2 can only make us safer divers.
منابع مشابه
The Depth and Gas Dilemma
During the last decade, the recreational diving community demonstrated a renewed interest in deep scuba diving. In spite of instructional agency decree, increasing numbers of divers are answering the call of the deep. Mixtures of helium, nitrogen, and oxygen were used to extend scuba diving depth beyond 800 feet. This paper explores individual motivations, physiological responses, and diver res...
متن کاملBreathing at depth: physiologic and clinical aspects of diving while breathing compressed gas.
When diving, human beings are exposed to hazards that are unique to the hyperbaric underwater environment and the physical behavior of gases at higher ambient pressure. Hypercapnia, hyperoxia, carbon monoxide intoxication, inert gas (predominantly nitrogen) narcosis, and decompression illness all may lead to impaired consciousness, with a high risk of drowning in this non-respirable environment...
متن کاملEffects of elevated oxygen and carbon dioxide partial pressures on respiratory function and cognitive performance.
Hyperoxia during diving has been suggested to exacerbate hypercapnic narcosis and promote unconsciousness. We tested this hypothesis in male volunteers (12 at rest, 10 at 75 W cycle ergometer exercise) breathing each of four gases in a hyperbaric chamber. Inspired Po2 (PiO2 ) was 0.21 and 1.3 atmospheres (atm) without or with an individual subject's maximum tolerable inspired CO2 (PiO2 = 0.055-...
متن کاملCarbon Dioxide, Narcosis,
Carbon dioxide (CO2) is the gaseous end product of the aerobic metabolism of oxygen. CO2 is highly soluble in body tissues, and readily diffuses from cells to blood, where circulation transports it to the lungs for elimination. Divers often ignore carbon dioxide, as CO2 is a normal part of life. However, CO2 may have definite and detrimental effects if a diver accumulates an excessive amount of...
متن کاملCompressed breathing air - the potential for evil from within.
Human underwater activities rely on an adequate supply of breathable compressed gas, usually air, free from contaminants that could cause incapacitation underwater or post-dive or longer-term health effects. Potentially fatal but well-known hazards are hypoxia secondary to steel cylinder corrosion and carbon monoxide (CO) poisoning due to contaminated intake air. Another phenomenon may be behin...
متن کامل