Aeromed Ops Flashcards
VFR Minimums (helicopter)
Local Day: 500’ ceiling, 1mile visibility
Local night: 800’ ceiling, 2miles visibility
Xcountry day: 1000’ ceiling, 1mile vis
Xcountry night: 1000’ ceiling, 3 mile vis
Minimum Sterile cockpit altitude on fixed wing
10,000’
Helicopter LZ requirements (5x)
100’ x100’ No obstacles Hard surface Less than 5’ slope Outlined by 4 markers
Stressors of Flight 10
Decreased po2 Decreased barometric pressure Decreased humidity Thermal changes Noise Vibration Fatigue Spatial disorientation G forces
Fatigue Management Standards 4
Max shift time 24hrs
Max duty time 16hrs In 24 hours
Unscheduled break permitted for duty periods longer than 16hours
Minimum 8hrs rest before shifts longer than 12 hours
Areas Effected by barotrauma 5
Digestive tract Sinuses Middle ear Teeth Lungs
Dysbarism meaning
Causes pain in closed cavities
Barotitis media
Gas expansion Causes pain in middle ear, eardrum rupture
Symptoms of decompression sickness 4
Bends -joint pain
Chokes - SOB -air in pulmonary vasculature
Creeps -air under skin
Staggers -CNS- gas in middle ear/cns
Indifferent stage hypoxia
10000’
O2 98-99
Minor effects
Disturbance Stage hypoxia
15-20000’ O2 70-79 Subjective and objective hypoxia symptoms Cognitive impairment Muscular coordination decreases
Critical stage hypoxia
Occurs in 3-5 minutes
O2 60-69
Hyperventilation
Mental confusion, incapacitation, death
Contraindications to air transport (4)
Terminal illness
DNR
Cardiac Arrest
Conditions which will overwhelm the capabilities of the crew
Relative contraindications to flight (7)
Severe anemia Hemoglobinopathy MI within 10 days or complications within the preceding 5 days Uncontrolled arrhythmia Pregnancy >24weeks gestation Recent eye surgery affecting the globe Nonacute hypovolaemia
Compensatory stage hypoxia
10-15000’
O2 80-89
Short term compensation inc. HR and RR
