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Breathing gas mixture experimentally used for very deep diving
Hydrox is a gas mixture of hydrogen and oxygen, occasionally used as an experimental breathing gas in very deep diving. It allows divers to descend several
Hydrox_(breathing_gas)
Gas used for human respiration
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
Breathing_gas
Underwater diving to a depth beyond the norm
oxygen, helium and nitrogen Hydreliox – Breathing gas mixture of hydrogen, helium, and oxygen Hydrox – Breathing gas mixture experimentally used for very
Deep_diving
Breathing gas consisting of oxygen, helium and nitrogen
Heliox – Breathing gas mixed from helium and oxygen Hydreliox – Breathing gas mixture of hydrogen, helium, and oxygen Hydrox – Breathing gas mixture experimentally
Trimix_(breathing_gas)
Estimation of breathing gas mixtures and quantities required for a planned dive profile
sufficient breathing gas to safely return to a place where more breathing gas is available. In almost all cases this will be the surface. Gas planning includes
Scuba_gas_planning
Portable apparatus to recycle breathing gas
open-circuit breathing apparatus, where the exhaled gas is discharged directly into the environment. The purpose is to extend the breathing endurance of
Rebreather
Influences of the underwater environment on the physiology of human divers
underwater, both during breath-hold dives and while breathing at ambient pressure from a suitable breathing gas supply. It, therefore, includes the range of
Human physiology of underwater diving
Human_physiology_of_underwater_diving
Energy expended to inhale and exhale a breathing gas
Work of breathing (WOB) is the energy expended to inhale and exhale a breathing gas. It is usually expressed as work per unit volume, for example, joules/litre
Work_of_breathing
Gas mixture occasionally used by scuba divers for dry-suit inflation
Heliox – Breathing gas mixed from helium and oxygen Hydreliox – Breathing gas mixture of hydrogen, helium, and oxygen Hydrox – Breathing gas mixture experimentally
Argox
Skills required to scuba-dive safely
descent, breathing underwater, monitoring the dive profile (depth, time, and decompression status) and progress of the dive, personal breathing gas management
Scuba_skills
Mixing and filling cylinders with breathing gases for use when scuba diving
Gas blending for scuba diving (or gas mixing) is the filling of diving cylinders with non-air breathing gases such as nitrox, trimix and heliox. Use of
Gas_blending_for_scuba_diving
Breathing gas mixture of hydrogen, helium, and oxygen
Argox – Gas mixture occasionally used by scuba divers for dry-suit inflation Heliox – Breathing gas mixed from helium and oxygen Hydrox – Breathing gas mixture
Hydreliox
Self-contained underwater breathing apparatus
just scuba, is any breathing apparatus that is entirely carried by an underwater diver and provides the diver with breathing gas at the ambient pressure
Scuba_set
Equipment used specifically for surface supplied diving
surface-supplied diving is that breathing gas is supplied from the surface, either from a specialised diving compressor, high-pressure gas storage cylinders, or
Surface-supplied diving equipment
Surface-supplied_diving_equipment
Disorder caused by dissolved gases forming bubbles in tissues
Decompression sickness can occur after an exposure to increased pressure while breathing a gas with a metabolically inert component, then decompressing too fast for
Decompression_sickness
Underwater diving breathing gas supplied from the surface
diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore
Surface-supplied_diving
Facility for supporting saturation diving projects
Breathing gas supply and distribution, and recycling and purification. The divers use surface-supplied umbilical diving equipment, using a breathing gas
Saturation_diving_system
Rigid head enclosure for underwater diving
A diving helmet is a rigid head enclosure with a breathing gas supply used in underwater diving. They are worn mainly by professional divers engaged in
Diving_helmet
Container to supply high pressure gas for diving operations
or diving gas cylinder is a gas cylinder used to store and transport high-pressure gas used in diving operations. This may be breathing gas used with
Diving_cylinder
Scuba set with variable-density buoyancy control
bladder to separate the stored breathing gas from the ballast water, both of which are carried in the hydrotank. Gas charging pressure is about 300 bar
Avelo_diving_system
Psychotropic state induced by breathing hydrogen at high partial pressures
partial pressure Hydrox (breathing gas) – Breathing gas mixture experimentally used for very deep diving Hydreliox – Breathing gas mixture of hydrogen
Hydrogen_narcosis
Logistical aspects of scuba breathing gas
transportation of gas cylinders for a dive, the monitoring and switching of breathing gases during a dive, efficient and correct use of the gas, and the provision
Scuba_gas_management
Technique for sharing breathing gas from a single mouthpiece
Buddy breathing is a rescue technique used in scuba diving "out-of-gas" emergencies, when two divers share one demand valve, alternately breathing from
Buddy_breathing
Diving mode and decompression technique
which the body tissues become saturated with metabolically inert gas from the breathing gas mixture. Once saturated, the time required for decompression to
Saturation_diving
Closed or semi-closed circuit scuba
Diving rebreather technology may be used where breathing gas supply is limited, or where the breathing gas is specially enriched or contains expensive components
Diving_rebreather
List of articles related to underwater diving grouped by topical relevance
helium, and oxygen Hydrox (breathing gas) – Breathing gas mixture experimentally used for very deep diving Nitrox – Breathing gas, mixture of nitrogen
Outline_of_underwater_diving
Machine used to compress breathing air for use by underwater divers
cylinders with high-pressure air pure enough to be used as a hyperbaric breathing gas. A low pressure diving air compressor usually has a delivery pressure
Diving_air_compressor
Breathing gas mixed from helium and oxygen
hydrogen, helium, and oxygen Hydrox – Breathing gas mixture experimentally used for very deep diving Trimix – Breathing gas consisting of oxygen, helium
Heliox
Producing special gas mixtures to specification
storage and breathing gases. Gas mixtures are usually specified in terms of molar gas fraction (which is closely approximated by volumetric gas fraction
Gas_blending
Breathing gas, mixture of nitrogen and oxygen
Breathing gas mixture of hydrogen, helium, and oxygen Hydrox – Breathing gas mixture experimentally used for very deep diving Trimix – Breathing gas consisting
Nitrox
Mechanism that controls the pressure of a breathing gas supply for diving
the pressure of breathing gas for underwater diving. The most commonly recognised application is to reduce pressurized breathing gas to ambient pressure
Diving_regulator
Filling pressurized gas from a series of storage cylinders
calculated using the general gas equation of state if the temperature of the gas in the cylinder is accurately measured. A breathing set cylinder may be filled
Cascade_filling_system
Swimming underwater, breathing gas carried by the diver
underwater diving mode where divers use breathing equipment completely independent of a surface breathing gas supply, and therefore has a limited but
Scuba_diving
Equipment which provides breathing gas to an underwater diver
amount of breathing gas to allow the user to reach the surface from a disabled vessel or vehicle. Atmospheric pressure underwater breathing apparatus
Underwater breathing apparatus
Underwater_breathing_apparatus
Severely deficient supply of oxygen
seizure which stops breathing activity An allergic reaction Strangling Breaking the wind pipe Prolonged exposure to chlorine gas Smothering is a mechanical
Asphyxia
Techniques requiring specific equipment and procedures
freediving and compressed-gas diving, which may also be classed as air diving, oxygen diving, and mixed gas diving by the breathing gas used, and as open-circuit
Modes_of_underwater_diving
Theoretical modelling of decompression physiology
the study and modelling of the transfer of the inert gas component of breathing gases from the gas in the lungs to the tissues and back during exposure
Decompression_theory
German manufacturer of breathing equipment
reducer, was patented. In 1899, Dräger introduced a pressure gauge for breathing gas cylinders, which is still referred to today as a finimeter. In 1902
Dräger_(company)
Equipment for controlling the buoyancy of a diver
adjusting the volume of gas in an inflatable bladder, which is filled with ambient pressure gas from the diver's primary breathing gas cylinder via a low-pressure
Buoyancy_compensator_(diving)
System for supply of breathing gas on demand within a confined space
A built-in breathing system is a source of breathing gas installed in a confined space where an alternative to the ambient gas may be required for medical
Built-in_breathing_system
Safety concept in underwater diving
maximum operating depth (MOD) of a breathing gas is the depth below which the partial pressure of oxygen (pO2) of the gas mix exceeds an acceptable limit
Maximum_operating_depth
Agents and situations that pose a threat to the underwater diver
physical and health risks when they go underwater or use high pressure breathing gas. The consequences of diving incidents range from merely annoying to
Diving_hazards
Physiological basis for decompression theory and practice
inert gas in the breathing gas is reduced below that of any of the tissues, there will be a tendency for gas to return from the tissues to the breathing gas
Physiology_of_decompression
Diver who remains underwater for 24 hours or more
remains underwater, breathing at the ambient pressure for long enough for the concentration of the inert components of the breathing gas dissolved in the
Aquanaut
Forensic investigation of underwater diving accidents
also occur when the diver runs out of breathing gas, as the breathing gas supply is generally the inflation gas supply. This can complicate an emergency
Investigation of diving accidents
Investigation_of_diving_accidents
Emergency supply of breathing gas for an underwater diver
source, or more generally alternative breathing gas source, is a secondary supply of air or other breathing gas for use by the diver in an emergency.
Alternative_air_source
Cylindrical container for storing pressurised gas
commonly used to refer to a compressed gas cylinder used for breathing gas supply to an underwater breathing apparatus. Cylinder – Either the shell or
Gas_cylinder
Equipment used to facilitate underwater diving
mixed gas. Mainly of historical interest now. Surface-supplied open circuit free-flow air diving, using compressed atmospheric air as the breathing gas. Surface-supplied
Diving_equipment
Arrangement and function of the components of regulators for underwater diving
arrangement of components and function of gas pressure regulators used in the systems which supply breathing gases for underwater diving. Both free-flow and
Mechanism of diving regulators
Mechanism_of_diving_regulators
Medical condition of lack of oxygen in the tissues
due to external causes, when the breathing gas is hypoxic, or internal causes, such as reduced effectiveness of gas transfer in the lungs, reduced capacity
Hypoxia_(medicine)
Narcotic effects of respiratory nitrogen
1152/ajplegacy.1939.126.2.409. Ornhagen, H (1984). "Hydrogen-Oxygen (Hydrox) breathing at 1.3 MPa". FOA Rapport C58015-H1. Stockholm: National Defence Research
Nitrogen_narcosis
Deaths occurring while scuba diving or as a consequence of scuba diving
contributory factors as they carry a supply of breathing gas and equipment designed to provide the gas on demand. Drowning occurs as a consequence of
Scuba_diving_fatalities
Diving under a physical barrier to a direct vertical ascent to the surface
by adaptations of procedures and use of equipment such as redundant breathing gas sources and guide lines to indicate the route to the exit. There are
Penetration_diving
Hyperbaric pressure vessel for human occupancy used in diving operations
than ambient pressure, a pressurised gas system to control the internal pressure, and a supply of breathing gas for the occupants. There are two main
Diving_chamber
Underwater diving procedures
described under the following headings: Setting up the gas supply – Main and backup breathing gas supply may be from a low pressure compressor, high pressure
Surface-supplied diving skills
Surface-supplied_diving_skills
Diving mask that covers the mouth as well as the eyes and nose
contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. The full face mask has several functions: it lets
Full-face_diving_mask
Conditions in which the temperature of a diver can remain stable
effect is also modified by changes in breathing gas composition necessary for reducing narcosis and work of breathing, to limit oxygen toxicity and to accelerate
Thermal balance of the underwater diver
Thermal_balance_of_the_underwater_diver
Equipment used by divers to facilitate decompression
composition of the breathing gas controlled at the gas panel. Divers with long decompression obligations may be decompressed inside gas filled hyperbaric
Decompression_equipment
Capacity of breathing regulators to function as specified
The breathing performance of regulators is a measure of the ability of a breathing gas regulator to meet the demands placed on it at varying ambient pressures
Breathing performance of regulators
Breathing_performance_of_regulators
Equipment used in the support of an underwater diving operation
of a fluid Breathing gas – Gas used for human respiration Carbon dioxide scrubber – Device which absorbs carbon dioxide from circulated gas Cascade filling
Diving_support_equipment
Situation that endangers the life or health of a diver
valve, or a burst breathing gas hose. Some of these can also be caused by diver or team error. Diver errors. such as running out of gas, overstaying at
Underwater_diving_emergency
Gaseous diffusion through body tissue at constant total pressure
formation of inert gas bubbles. These isobaric skin lesions (urticaria) do not occur when the ambient gas is nitrogen and the breathing gas is helium. Deep
Isobaric_counterdiffusion
Injury due to pressure difference between gas filled space and adjoining tissue
scuba or surface-supplied diver breathing gas at depth from underwater breathing apparatus fills their lungs with gas at an ambient pressure greater than
Barotrauma
Emergency gas supply cylinder carried by a diver
an underwater diver for use as an emergency supply of breathing gas in the event of a primary gas supply failure. A bailout cylinder may be carried by
Bailout_bottle
Abnormally high tissue carbon dioxide levels
deliberately hypoventilating, known as "skip breathing". Skip breathing is a controversial technique to conserve breathing gas when using open-circuit scuba, which
Hypercapnia
Process of planning an underwater diving operation
level of safety. Breathing gases may be supplied from the surface through a diver's umbilical, or airline hose, which provides breathing gas, communications
Dive_planning
Swedish diver and researcher (1917–1945)
research with the breathing mixture hydrox for the Swedish Navy. Zetterström first described the use of hydrogen as a breathing gas in 1943. From 1943
Arne_Zetterström
Chamber for transporting divers vertically through the water
use for another dive. Breathing gas supplies for the bell comprise a primary gas supply, a reserve gas supply and an emergency gas supply carried on the
Diving_bell
Diving in water-filled caves
drowning when the breathing gas supply runs out. The equipment aspect largely involves the provision of an adequate breathing gas supply to cover reasonably
Cave_diving
Underwater diving without breathing apparatus
relies on breath-holding (apnea) until resurfacing rather than the use of breathing apparatus such as scuba gear. Historically and colloquially, the term
Freediving
Bundle of supplying cables or hoses
closed bell, a diver excursion umbilical includes a breathing gas supply hose, 5⁄8 inch (16 mm) gas reclaim hose, hot water hose, pneumofathometer hose
Umbilical_cable
Hypothetical devices to extract oxygen from water
of liquid breathing with a membrane oxygenator to solve the problem of carbon dioxide retention, the major limiting factor in liquid breathing.[dubious
Artificial_gills_(human)
Oxygen rebreather
needed] Underwater diving portal Escape set – Self contained breathing apparatus providing gas to escape from a hazardous environment DSEA page at The Rebreather
Davis Submerged Escape Apparatus
Davis_Submerged_Escape_Apparatus
Alphabetical listing of underwater diving related topics
Hydrostatic test – Non-destructive test of pressure vessels Hydrox (breathing gas) – Breathing gas mixture experimentally used for very deep diving Hyperbaric
Index of underwater diving: F–K
Index_of_underwater_diving:_F–K
Original name for open-circuit scuba equipment
scuba regulators. A diaphragm is used to control a valve to deliver the breathing gas to the diver on demand, at ambient water pressure. However, the layout
Aqua-Lung
Planned hyperbaric exposure using a specified breathing gas as medical treatment
pressure exposures specifying the pressure profile over time and the breathing gas to be used during specified periods, for medical treatment. Hyperbaric
Hyperbaric treatment schedules
Hyperbaric_treatment_schedules
French offshore diving contractor
in the divers' breathing gas. This work with heliox (a breathing gas mixture of helium and oxygen) and hydreliox (an exotic breathing gas mixture of helium
Compagnie maritime d'expertises
Compagnie_maritime_d'expertises
Competitive watersport using swimfins for propulsion
by CMAS. Underwater breathing apparatus is restricted to open circuit scuba using compressed atmospheric air as the breathing gas. The use of oxygen enriched
Finswimming
Medical conditions resulting from changes in ambient pressure
depths where breathing of ambient pressure gas is feasible.[citation needed] Gas is very compressible. At survivable pressures most gases occupy a volume
Dysbarism
Diving beyond the scope of recreational diving
and experience. The equipment involves breathing gases other than air or standard nitrox mixtures, and multiple gas sources. Most technical diving is done
Technical_diving
Method for comparing the narcotic effects of a mixed diving gas with air
the narcotic effect of a breathing gas mixture, such as nitrox, heliox or trimix. The method is used, for a given breathing gas mix and dive depth, to calculate
Equivalent_narcotic_depth
Toxic effects of breathing oxygen at high partial pressures
oxygen bars. Scuba divers use breathing gases containing up to 100% oxygen, and should have specific training in using such gases. The effects of oxygen toxicity
Oxygen_toxicity
Toxic effects of carbon monoxide
Carbon monoxide poisoning typically occurs from breathing in carbon monoxide (CO) at excessive levels. Symptoms are often described as "flu-like" and
Carbon_monoxide_poisoning
Origins and development of diving using breathing gas carried by the diver
architectures for underwater breathing apparatus had been pioneered; open-circuit surface supplied equipment where the diver's exhaled gas is vented directly into
History_of_scuba_diving
Human habitable underwater enclosure filled with breathable gas
suitable environmental conditions, and the one which is most critical is breathing gas of suitable quality. Others concern the physical environment (pressure
Underwater_habitat
Garment or device designed to protect a diver from the underwater environment
from the underwater environment. A diving suit may also incorporate a breathing gas supply (such as for a standard diving dress or atmospheric diving suit)
Diving_suit
Feature on some watches for saturation diving
escape valve or gas escape valve is a feature found on some diving watches intended for saturation diving using helium based breathing gas. When saturation
Helium_release_valve
Ascent to the surface by a diver in an emergency
where the diver is assisted by another diver, who generally provides breathing gas, but may also provide transportation or other assistance. The extreme
Emergency_ascent
Underwater diving under ice
freezing as the first stage can be managed by the surface team, and the breathing gas supply is less limited. For the surface support team, the hazards include
Ice_diving
Electrochemical device for measuring oxygen partial pressure
commonly used to measure the concentration of oxygen gas in underwater diving and medical breathing gases. Electronically monitored or controlled diving rebreather
Electro-galvanic oxygen sensor
Electro-galvanic_oxygen_sensor
Influence of the interaction between the user and the equipment on design
taken with minimum risk. When more than one breathing gas mixture is available, the risk of selecting a gas unsuitable for the current depth must be minimised
Human factors in diving equipment design
Human_factors_in_diving_equipment_design
Loss of consciousness caused by cerebral hypoxia towards the end of a breath-hold dive
hyperventilation Breathing more gas than is necessary to compensate for metabolic consumption. There is a continuum between normal breathing and hyperventilation:
Freediving_blackout
Underwater diving using self contained breathing gas recycling apparatus
using diving rebreathers, a class of underwater breathing apparatus which recirculates the breathing gas exhaled by the diver after replacing the oxygen
Rebreather_diving
Powered device for diver mobility and range extension
Range is restricted by the amount of breathing gas that can be carried, the rate at which that breathing gas is consumed, and the battery power of the
Diver_propulsion_vehicle
Techniques and procedures for safe decompression of divers
release of excess inert gases dissolved in their body tissues at acceptable risk, which accumulated as a result of breathing at ambient pressures greater
Decompression_practice
Evidence of physiological disorders resulting from underwater diving
disorders are caused by breathing gas at the high pressures encountered at the depth of the water and divers will often breathe a gas mixture different from
List of signs and symptoms of diving disorders
List_of_signs_and_symptoms_of_diving_disorders
Military semi-closed circuit passive addition diving rebreather
the amount of feed gas supplied is a function of the breathing rate of the diver. Unlike most passive addition rebreathers, the gas feed mass flow rate
Interspiro_DCSC
Physiological disorders resulting from underwater diving
skin. Arterial gas embolism: Air or other breathing gas in the blood stream, causing blockage of small blood vessels. Intestinal gas overexpansion Middle
Diving_disorders
Pressure reduction and its effects during ascent from depth
held constant, and after surfacing, until the gas concentrations reach equilibrium. Divers breathing gas at ambient pressure need to ascend at a rate determined
Decompression_(diving)
Physiological responses to immersion of air-breathing vertebrates
and the breathing gas delivery, increased breathing gas density due to ambient pressure, and increased flow resistance due to higher breathing rates may
Diving_reflex
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HYDROX BREATHING-GAS
HYDROX BREATHING-GAS
Boy/Male
Indian
Healthy, Vanity, Breath, Breathing
Girl/Female
Bengali, Indian
Breathing of God
Girl/Female
Biblical
Breathing, or making, a sweet smell.
Boy/Male
Hawaiian
Breath; breathing spirit.
Female
Greek
(á½Î´Ïα) Greek name derived from the word hydor, HYDRA means "water." In mythology, this is the name of a many-headed water dragon killed by Herakles.
Boy/Male
Muslim
Healthy, Vanity, Breath, Breathing
Boy/Male
Biblical
Breaking, hope.
Girl/Female
Hindu, Indian
Creating Arts
Girl/Female
Indian, Sanskrit
Splitting; Breaking
Boy/Male
Indian, Sanskrit
Breaking; Splitting
Boy/Male
Hawaiian
Breath; breathing spirit.
Boy/Male
Tamil
Healthy, Vanity, Breath, Breathing
Boy/Male
Indian, Sanskrit
Creating Joy
Boy/Male
Indian
Healthy, Vanity, Breath, Breathing
Male
Egyptian
, the breathing one.
Surname or Lastname
English
English : patronymic form of Haddock.
Biblical
breathing, or making, a sweet smell
Girl/Female
Indian
Creating
Girl/Female
Greek, Indian
Water; The Hydra in Heracles; Feminine of Hydr
Biblical
breaking; hope
HYDROX BREATHING-GAS
HYDROX BREATHING-GAS
HYDROX BREATHING-GAS
HYDROX BREATHING-GAS
HYDROX BREATHING-GAS
HYDROX BREATHING-GAS
HYDROX BREATHING-GAS
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