Tag Archive: hypoxia

Hypoxia Training – Essentially Useful.

Most military aircrew undergo hypoxia training, including experience in decompression chamber, to understand the ill-effects of the silent but deadly hazard of in-flight hypoxia [1]. Symptoms experienced during the classic mask-off hypoxia indoctrination in altitude/decompression chamber correlates well with reported in-flight symptoms [2]. The objectives of hypoxia indoctrination, an effects-based training, is to make aircrew …

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Medical Incidents in Air: Cabin Crew reports…

Increase in volume of airline passenger traffic is leading to an increase in number of in-flight medical incidents [1, 2]. A large number of such incidents are, in fact, “identified, managed and documented by cabin crew without the involvement of medically trained persons” [3]. Common in-flight medical conditions are fainting or syncope (incidence 10-53.5%); gastrointestinal …

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Cabin Pressurisation – Hazards of Rapid Decompression

Incidence of failure of cabin pressurisation in military aircraft, even in peace time, is higher than commercial aviation. The commonest cause of loss of pressurisation in military aviation, especially in fighter flying, is engine flameout.

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Cabin Pressurisation – If Lost?

On 10 Jun 1990, on BA flight 5390, Captain Tim Lancaster was sucked out halfway out of the aircraft, when an improperly installed windscreen pane failed. While the first officer made an emergency landing in Southampton, the cabin crew firmly held on to Tim, bringing him down safely [*].

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Cabin Pressurisation – The Mechanism

It is not practical to maintain sea level conditions in flight. For example, a cabin differential pressure of 1 Kg/sq cm (nearly 1 ATA) generates more than 1,000 gm/cm2 pressure on the cabin wall and the transparency. If the cabin altitude of 2,500 m (8,000 ft) is accepted,the pressure differential would now be reduced by …

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Cabin Pressurisation – An Introduction

On 26 January 2011, a Qantas Boeing 737-400 made an emergency descent of about 8000m [*], when the aircraft lost cabin pressure after about 30 minutes of flight. This flight, with 99 passengers, from Adelaide to Melbourne had oxygen masks dropping in the cabin, causing a scare amongst its 99 passengers. 



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