Air, Heliox, Nitrox, Oxygen, Trimix, Gas blending for scuba diving, Diving cylinder, Scuba set, Rebreather
Sailors check breathing devices at sea.
A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas, but other mixtures of gases, or pure oxygen, are also used in breathing equipment and enclosed habitats. Oxygen is the essential component for any breathing gas. Breathing gases for hyperbaric use have been developed to improve on the performance of ordinary air by reducing the risk of decompression sickness, reducing the duration of decompression, reducing nitrogen narcosis or allowing safer deep diving.
A breathinggas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathinggas, but...
occupant. Breathing apparatus may be classified by type in several ways: by breathinggas source: self-contained gas supply, remotely supplied gas, or purified...
just scuba, is any breathing apparatus that is entirely carried by an underwater diver and provides the diver with breathinggas at the ambient pressure...
equilibrium with the partial pressures of the inert components of the breathinggas used. It is a diving mode that reduces the number of decompressions...
open-circuit breathing apparatus, where the exhaled gas is discharged directly into the environment. The purpose is to extend the breathing endurance of...
underwater diving whereby divers use breathing equipment that is completely independent of a surface breathinggas supply, and therefore has a limited...
Work of breathing (WOB) is the energy expended to inhale and exhale a breathinggas. It is usually expressed as work per unit volume, for example, joules/litre...
Breathing (spiration or ventilation) is the rhythmical process of moving air into and out of the lungs to facilitate gas exchange with the internal environment...
Diving rebreather technology may be used where breathinggas supply is limited, or where the breathinggas is specially enriched or contains expensive components...
by breathinggas source: self-contained gas supply, or remotely supplied gas, by breathing circuit type: open, semi-closed, or closed circuit, by gas supply...
underwater, both during breath-hold dives and while breathing at ambient pressure from a suitable breathinggas supply. It, therefore, includes the range of...
sufficient breathinggas to safely return to a place where more breathinggas is available. In almost all cases this will be the surface. Gas planning includes...
allow the release of excess inert gases dissolved in their body tissues, which accommodated as a result of breathing at ambient pressures greater than...
it is also used as a bailout gas. Helium is also useful as a breathinggas diluent to reduce work of breathing of gases, both at high ambient pressures...
of a breathinggasBreathinggas switch – Changing between breathing gasses of different composition while diving Breathing loop – Breathinggas circuit...
are also found on large highway vehicles. Compressed air is used as a breathinggas by underwater divers. It may be carried by the diver in a high-pressure...
the pressure of breathinggas for underwater diving. The most commonly recognised application is to reduce pressurized breathinggas to ambient pressure...
gas oxygen supply, positive pressure demand apparatus, or constant flow apparatus using high pressure compressed air. Contamination of the breathing gas...
perfluorocarbon), rather than breathing air, by selecting a liquid that can hold a large amount of oxygen and is capable of CO2 gas exchange. This requires...
most common inert gas used in breathinggas for commercial diving is helium. Breathinggas – Gas used for human respiration Industrial gas – Gaseous materials...
A breathing circuit is those parts of a breathing apparatus (or breathing system), which direct the flow of supplied breathinggas to, and sometimes from...
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