Hypoxia
Hyperventilation
Ear and Sinus Block
CO and CO2
Decompression Sickness
100

Reduced or not enough oxygen

Hypoxia

100

Helps maintain CO2 levels when hyperventilating 

Breathing into a paper bag

100

The "popping" of the ear with
changes in altitude is caused by
the release of pressure in this part
of the ear.

the middle ear

100

CO2 could fill the cabin and
starve your body of oxygen if this
product is carried in the aircraft

dry ice

100

Decompression sickness is
associated with this gas causing
bubbles in the body

nitrogen

200

Hypoxic, hypemic, stagnant, and
histotoxic

the four types of hypoxia

200

This hormone, when induced by
pain, fear, or anxiety, may increase
the breathing rate and contribute
to hyperventilation

adrenaline

200

Swelling or mucus caused by
the common cold can block this
pathway, causing trapped air in
the ear

the eustachian tube

200

Small aircraft heaters that use the
exhaust manifold as a heat source
could allow this gas into the cabin

CO

200

Pilots should wait this long after
their last scuba dive prior to flying
to minimize the risks of DCS

24 hours

300

The altitude above which the FAA
requires pilots use supplemental
oxygen immediately

14,000 ft Pressure Altitude

300

Hyperventilation causes too
little of this gas to be in the
bloodstream

CO2

300

If not corrected, a pilot who
descends with an ear blockage
may rupture this membrane

the eardrum

300

Carrying dry ice in a sealed
container could result in this type
of event

explosion of the sealed container holding the dry ice

300

The type of DCS that occurs if
bubbles of gas make their way to
the joints

the bends

400

The condition in which
hemoglobin cannot carry oxygen
to the body, caused by carbon
monoxide

Hypemic Hypoxia

400

After controlling breathing, this
is the recommended corrective
action if a pilot is unsure if
the condition is hypoxia or
hyperventilation

using supplemental oxygen

400

A pilot flying with a head cold or
similar ailment might feel pain
behind the eyes or nose as the
trapped air in this area reacts to
changes in atmospheric pressure

the sinus cavity

400

This addictive habit can result
in self-induced CO poisoning
when smoke is inhaled, even
secondhand.

smoking

400

The source of the gas that causes
DCS after scuba diving. 

compressed air breathed during the dive

500

The maximum time a pilot has
to make rational, life-saving
decisions without supplemental
oxygen

Time of Useful Consciousness (TUC)

500

The most common way to recover
from hyperventilation, besides
controlling breathing rate and
breathing into a paper bag.

talking out loud

500

A pilot experiencing ear or sinus
pain during a descent should
consider doing this with the
airplane to allow the ear or sinus
pressures to stabilize before
continuing

slow the descent, level off, or climb

500

Due to the dangers of this gas,
it is common for detectors to be
placed in the aircraft cabin in view
of the pilot

carbon monoxide

500

A pilot who needs medical
attention for DCS may be
treated in this device, which
enables doctors to control the
atmospheric pressure

a hyperbaric chamber

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