Chapter 5 - Depressurisation Flashcards
Emergency Descent Command
This is the Captain. Emergency Descent
Commence follow up duties command
This is the Captain. Oxygen is no longer required.
Time of useful consciousness at 35,000 ft
30 - 60 seconds
Effects on respiration at high altitude
- hypoxia
- hyperventilation
- trapped gas expansion
- decompression sickness
- asthma attacks
2 types of depressurisation
- gradual
- rapid
Definition of gradual depressurisation
Classified as a non-normal. Caused by failure of the equipment controlling the cabin pressure or by a slow leak.
Definition of rapid depressurisation
Classified as an emergency. Caused by failure of the pressurisation system, the failure of a door, window, or by a hole in the fuselage.
Mild Hypoxia
- F - fatigue
- L - listless or vague distress
- L - lack of concentration
Fanny Lick Lick
Moderate Hypoxia
- L - lak of self criticism
- M - mood changes and confusion
- B - Breathlessness
Lick My Boobs
Severe Hypoxia
- B - blue tinge (cyanosis)
- L - loss of consciousnenss
- D - death
Blue Like Death
Management of hypoxia
- give oxygen at HI flow
- loosen tight clothing
- recovery is rapid when oxygen is applied - oxygen paradox - don’t remove oxygen
During a rapid depressurisation, if there is no PA forthcoming from the flight deck, what other indications may occur in the cabin?
- oxygen masks will drop
- emergency descent
- loud noise
- rapid expansionof air causing fog in the cabin
- wind noise
- dust and loose paper
- hot fluids boiling
- discomfort or pain
- hypoxia
What information will cabin crew report to the captain after reassessing the state of the cabin?
- Current state of the cabin
- injuries to passengers and cabin crew
- any continued supplemental oxygen requirements
In what parts of the body will you experience trapped gases?
- Middle ear
- sinuses
- bowel
- teeth
Decompression sickness symptoms
- joint pains
- tingling and numbness
- weakness
- chest tightness
- visual impairment
- dizziness
- altered conscious state or unconsciousness
