Sténuit and Lindbergh stayed in Link's SPID habitat ( Submersible, Portable, Inflatable Dwelling ) for 49 hours underwater at a depth of 432 feet, breathing a helium-oxygen mixture.

The US Navy does not allow repetitive diving for surface-supplied helium-oxygen diving and a 12 hour surface interval is required.

The MOL was planned to use a helium-oxygen atmosphere.

Therefore, in December 1942, several patients with advanced lymphomas ( cancers of certain white blood cells ) were given the drug by vein, rather than by breathing the irritating gas.

Enriched Air Nitrox, nitrox with an oxygen content above 21 %, is mainly used in scuba diving to reduce the proportion of nitrogen in the breathing gas mixture.

The forerunner to the modern gas mask was invented in 1847 by Lewis Haslett, a device that contained elements that allowed breathing through a nose and mouthpiece, inhalation of air through a bulb-shaped filter, and a vent to exhale air back into the atmosphere.

Narcosis results from breathing gases under elevated pressure and may be classified by the principal gas involved.

Underwater divers can use PDAs to plan breathing gas mixtures and decompression schedules using software such as " V-Planner.

A scuba set, acronym for self-contained underwater breathing apparatus, is any breathing set which is carried entirely by an underwater diver and provides the diver with breathing gas at the ambient pressure.

* Rebreather scuba recycles the exhaled gas, removes carbon dioxide, and compensates for the used oxygen before the diver is supplied with gas from the breathing circuit.

The amount of gas lost from the circuit during each breathing cycle depends on the design of the rebreather and depth change during the breathing cycle.

Gas in the breathing circuit is at ambient pressure, and stored gas is provided through regulators or injectors, dependent on design.

What characterizes a scuba set is its full independence from the surface as a breathing device, by transporting breathable air or other kind of breathing gas.

Both types of scuba provide a means of supplying air or other breathing gas, nearly always from a high pressure diving cylinder, and a harness to strap it to the diver's body.

Most open-circuit scuba and some rebreathers have a demand regulator to control the supply of breathing gas.

Constant flow scuba sets do not have a demand regulator ; the breathing gas flows at a constant rate, unless the diver switches it on and off by hand.

This type of set consists of one or more diving cylinders containing breathing gas at high pressure, typically, connected to a diving regulator.

The regulator supplies the diver with as much of the gas as needed, at a pressure suitable for breathing at the depth of the diver.

The return tube was not for rebreathing, but because the air exhaust needed to be as near as possible to the regulator's second stage diaphragm, to avoid pressure differences, which would cause a free-flow of gas, or extra resistance to breathing, according to the diver's orientation in the water — head-up, head-down, or level.

The gas endurance of open circuit demand scuba depends on factors such as the capacity ( volume of gas ) in the diving cylinder, the depth of the dive and the breathing rate of the diver, which is dependent on exertion, fitness, physical size of the diver, and experience among other factors.

An open circuit diver whose breathing rate at the surface ( atmospheric pressure ) is 15 litres per minute will consume 3 x 15 = 45 litres of gas per minute at 20 metres.

About that same time John Crosby's TV series on the popular arts proved again that giving jazz ample breathing space is one of the most sensible things a producer can do.

As well as breathing with lungs, they respire through the many folds in their skin which is thin with the capillaries close to the surface.

The technique is named after actor Frederick Matthias Alexander, who developed its principles in the 1890s as a personal tool to alleviate breathing problems and hoarseness during public speaking.

" The second exercise is the " Whispered Ah ," which is used to coordinate and free breathing & vocal production.

During combat, he is injured in his back, fatally ( Chapter 6 ) — the resulting wound is large enough for Paul to see Haie's breathing lung when Himmelstoss carries him to safety.

The first priority in treatment of a comatose patient is stabilization following the basic ABCs ( standing for airway, breathing, and circulation ).

Respiratory pattern ( breathing rhythm ) is significant and should be noted in a comatose patient.

Certain stereotypical patterns of breathing have been identified including Cheyne-Stokes a form of breathing in which the patient's breathing pattern is described as alternating episodes of hyperventilation and apnea.

Another pattern of breathing is apneustic breathing which is characterized by sudden pauses of inspiration and is due to a lesion of the pons.

Ataxic breathing is irregular and is due to a lesion ( damage ) of the medulla.

TCM's view of the body places little emphasis on anatomical structures, but is mainly concerned with the identification of functional entities ( which regulate digestion, breathing, aging etc .).

Perhaps the most extreme example in science fiction is James White's Sector General: a series of novels and short stories about multienvironment hospital for the strangest life-forms imaginable, some of them breathing methane, chlorine, water and sometimes also oxygen.

* Protect vital signs by monitoring ABCs, or Airway, Breathing, and Circulation ; that is, if the person is thought to be at risk for severe respiratory depression, consider an endotracheal tube to protect the airway and assist with breathing.

In chemistry, the letter H as symbol of enthalpy sometimes is said to be a Greek eta, but since enthalpy comes from ἐνθάλπος, which begins in a smooth breathing and epsilon, it is more likely a Latin H for ' heat '.

Jazz guitarists often try to imbue their melodic phrasing with the sense of natural breathing and legato phrasing used by horn players such as saxophone players.

Kerosene is often used in the entertainment industry for fire performances, such as fire breathing, fire juggling or poi, and fire dancing.

CDMA's " cell breathing " characteristic, where a terminal on the boundary of two congested cells will be unable to receive a clear signal, can often negate this advantage during peak periods.

Trimix is a breathing gas, consisting of oxygen, helium and nitrogen, and is often used in deep commercial diving and during the deep phase of dives carried out using technical diving techniques.

This is frequently used as a breathing gas in deep commercial diving operations, where it is often recycled to save the expensive helium component.

Helium conducts heat six times faster than air ; often helium breathing divers carry a separate supply of a different gas to inflate drysuits.

Sessions are linked with at-home recommendations including often Kegel exercises ( e. g., hold for 9 seconds, relax for 30 for 10 – 15 sets ) and relaxation ( breathing deep into the gut ).

In panic disorder, a person suffers from brief attacks of intense terror and apprehension, often marked by trembling, shaking, confusion, dizziness, nausea, difficulty breathing.

Citizens of the Culture refer to a normal human as " human-basic " and the vast majority opt for significant enhancements ; severed limbs grow back, sexual physiology can be voluntarily changed from male to female and back ( though the process itself takes time ), sexual stimulation and endurance are strongly heightened in both sexes ( something that is often subject of envious debate among other species ), pain can be switched off, toxins can be bypassed away from the digestive system, automatic functions such as breathing or heart rate can be switched to conscious control, and bones and muscles adapt quickly to changes in gravity without the need to exercise.

Sufferers of panic attacks often report a fear or sense of dying, " going crazy ," or experiencing a heart attack or " flashing vision ," feeling faint or nauseated, a numb sensation throughout the body, heavy breathing ( and almost always, hyperventilation ), or losing control of themselves.

The most common was phlebotomy, or venesection ( often called " breathing a vein "), in which blood was drawn from one or more of the larger external veins, such as those in the forearm or neck.

* Free-diving: Any form of diving without breathing apparatus, but often referring to competitive apnea as a sport.

The respiratory ICt < sub > 50 </ sub > ( median incapacitating dosage ) for BZ is 110 mg · min / m³ ( mild activity-15 l / min rate of breathing ), whereas the LCt < sub > 50 </ sub > is often estimated to be around 3, 800-41, 300 mg · min / m³.

In the early to middle stages of ketoacidosis, patients are typically flushed and breathing rapidly and deeply, but visible dehydration, pallor from diminished perfusion, shallower breathing, and tachycardia are often present when coma is reached.

Medical image registration ( for data of the same patient taken at different points in time such as change detection or tumor monitoring ) often additionally involves elastic ( also known as nonrigid ) registration to cope with deformation of the subject ( due to breathing, anatomical changes, and so forth ).

Though the specific use of breath and breathing is central to many styles of Japanese Reiki, it is often a neglected topic in Western Reiki.

Trance-like states which are often interpreted as religious ecstasy can be deliberately induced with techniques or ecstatic practices ; including, prayer, religious rituals, meditation, breathing exercises, physical exercise, sex, music, dancing, sweating, fasting, thirsting, and psychotropic drugs.

Hyperventilation is often used by both deep and distance free-divers to flush out carbon dioxide from the lungs to suppress the breathing reflex for longer.

most often performed with a rather insignificant obbligato accompaniment ; when scored for wind instruments it becomes a virtuoso challenge of circular breathing and double-tonguing.

The term caucus is also used in mediation, facilitation and other forms of alternate dispute resolution to describe circumstances wherein, rather than meeting at a common table, the disputants retreat to a more private setting to process information, agree on negotiation strategy, confer privately with counsel and / or with the mediator, or simply gain " breathing room " after the often emotionally-difficult interactions that can occur in the common area where all parties are present.

The container is often covered with a closed-weave cloth to prevent contamination by dust, mold, and other bacteria, while allowing gas transfer (" breathing ").

Patients develop a multistage illness that progresses from psychosis, memory deficits, seizures, and language disintegration into a state of unresponsiveness with catatonic features often associated with abnormal movements, and autonomic and breathing instability.

The most common findings in people with tension pneumothorax are chest pain and respiratory distress, often with an increased heart rate ( tachycardia ) and rapid breathing ( tachypnea ) in the initial stages.