Aeromed

State of feeling tired weary or sleepy due to prlonged exposure to (WASH) ,Work, Anxiety, Lack of Sleep, Harsh treatments.

Inability to accurately judge your position, attitude or motion to the surface of the earth or other prominent feature (i.e. trees poles fences at a hover)

(Never, Never, Trust and Avoid)

1) Never fly without a visual reference point

2) Never fly VMC and IMC at the same time

3) Trust your instruments

4) Avoid Stressors (Faith) Fatigue, anxiety, (insulin) Hypoglycemia, tobacco

(DDT)

1) Delay intuitive reaction

2) Develop a good cross check

3) Transfer flight controls

1) Type I – Unrecognized; Most dangerous; Pilot doesn’t think anything is wrong and fly’s right to the ground (Height Depth Illusion)


2) Type II – Recognized; Pilot realizes something is wrong but blames the instruments. (Graveyard Spiral)


3) Type III – Incapacitating; Overwhelming sensation of movement and can not control the aircraft. Transfer controls (Coriolis illusion)

1) Visual - most important, 80 percent of orientation information

2) Proprioceptive system – Seat of the pants flying sensations and pressures on the joints and muscles

• 3) Vestibular – Inner ear: A) Semicircular canals – change in angular acceleration (roll, pitch and yaw);
• B) Otolith organs – small sensory hairs that respond to gravity and linear acceleration.

1) Somatogyral (3 types) – angular acceleration and deceleration

Leans – (Most common) in a slow roll the fluid in your ear settles and you feel you are level. When you level the wings you sense a roll in the opposite direction and lean in the direction of the original bank until the sensation subsides.

Graveyard Spiral – Same as the leans but you ignore the instruments thinking they are broke and place the aircraft in a bank all the way to the ground

Coriolis Illusion – Prolonged turns with rapid head movement cause a tumbling disorienting feeling


2) Somotogravic (2 types)– linear acceleration and deceleration

• Oculogravic – FWD acceleration cause head to go back sensing a nose high
• Elevator – (updraft) upward acceleration, eyes track with horizon down sensing a nose high attitude

Oculoagravic – (downdraft) downward acceleration, eyes track up sensing a nose low.

(Death)

• Drugs (SOAPSC)
• Self medication
• Overdose
• Allergic reaction
• Predictable side effects
• Synergistic effects (combining drugs)
• Caffeine

• Exhaustion – lack of sleep, or physical exercise
• Alcohol – impairs night vision, reduces brain ability to use O2

Tobacco – Hypemic hypoxia 20 cigs a day or 3 in a row puts you at 5K’ pressure altitude psychologically reducing your night vision.

Hypoglycemia – blood sugar level falls causing fainting or tiredness

It Adheres to blood better than Oxygen. (200:1)

Symptoms - Headache, muscle cramps, impaired speech

Treatment – 100 percent oxygen. artificial respiration, application of warmth

Body’s nonspecific response to a demand placed on it.

Definition – Lack of oxygen in the body

4 types

1) Hypoxic – not enough O2 in the air at high altitude (reduced partial pressure)

2) Hypemic – reduced oxygen carrying capability of blood. (Smoking, blood loss)

3) Stagnant – Inadequate circulation of blood (High G maneuvers, heart failure)

4) Histotoxic – toxins interfere with bodies ability to use O2. (Alcohol or drugs)

(ICDC)


1) Indifferent: 10-10 K (90 percent O2) mild hypoxia; night vision deteriorates at 4,000 feet

2) Comensatory: 10-15K (80 percent 02) increased breathing and pulse to compensate; impaired efficiency, drowsiness, poor judgment

3) Disturbance: 15-20K (70 percent 02) body can no longer compensate; sleepiness, euphoria

4) Critical: 20K + (60 percent O2) happens within 3-5 min; incapacitation and death

1) Limit time at altitude

2) Use supplemental O2

3) Stay below 10K altitude

Above 10K = 1 hour

12K-14K = 30 mim

14K+ = always and all occupants

12 Hours (ASIA)

• Alcohol – from last drink no residual
• Simulator Sickness – after symptoms stop
• Immunizations – if reactions occur must be cleared by flt surgeon
• Anesthesia - local and dental (48hrs if spinal or epidural)

24 Hours:

• Plasma donation – 2x a year max
• Scuba
• Hyperbolic chamber – if above 25K (none is below 10K)

72 Hours:

Blood donation – more than 200cc

Descending – level off and clear, if unable climb to altitude where pain lessens clear then descend slowly and clear.