Ian Cook July 2013Ian Cook1. Hypoxia What is hypoxia and what can happen with prolonged hypoxia?...

Ian Cook

July 2013 Ian Cook 1

HypoxiaWhat is hypoxia and what can happen with

prolonged hypoxia?Hypoxia is the physical condition induced by an

inadequate concentration of oxygen in the blood and the vital organs.

The insidious danger of hypoxia is the subject's unawareness of his deteriorating faculties which may actually be perceived as a feeling of well-being or euphoria.

Exposure to severe hypoxia will result in unconsciousness. Note: there is a wide variability in individual tolerance.

Level of fitness or age does not determine ones tolerance


BREATHING AIR SAFETY POINTS

Read this literature carefully as your life and the lives of others depends on correct handling procedures

Oxygen under high pressure in the presence of organic compounds can cause spontaneous combustion.

If oil or grease contaminated fitting and threads come in contact with oxygen under high pressure there may be an explosion

This includes sunburn cream, skin grease, cooking oils.All equipment must be clean and free of dustCleaning is carried out using alcohol solvents and then

allow all components to dry thoroughly. There are special solvents & procedures available.


BREATHING AIR SAFETY POINTS (continued)

All components must be stored in clean sealed plastic bags in the plastic case located in the canteen.

Always store MH cylinders in their protective bags, full and in a cool area.

Only endorsed members may operate club MH EDS units.

Oxygen cylinders can be filled by members who are endorsed.

Only approved breathing oxygen cylinders that comply with Australian Standards and are in current test can be filled. (5 yrs composite) (10 yr Aluminium)

Use only Dry Aviation Breathing Oxygen BOC Code 430 / RAAF Spec G172


Mountain HighEDS-D1 system


Mountain High Oxygen supply


Cylinder, contents gauge, regulator and mask

Composite cylinder of 1850 PSI Capacity 142 cu in



EDS

Pulse demand unit

D1 model

Audio port -Flow fault & APNEA conditions

External battery port right hand side


On Off switchFlow rate settings

Red LED Oxygen Flow Faults& Battery Alarm

Green LED positive flow

Current Model (02D1)using double AA batteries


Using OxygenCheck:Cylinder – security, sufficient contents, turned ON

3 turns, gauge visible.Plumbing – lines correctly attached, secured and

not pinchedBattery in unit and working. A spare battery and

jack should be carried in an inside pocket. Battery effected by low temp. Not a requirement at >14,000 ft

EDS Unit connected to O2 supply and to nasal cannula or mask – fit mask/cannula prior to take off.

Check operation before commencing flying


SettingsThe EDS unit has four different flow rate

settings. These provide different O2 flow rates for a variety of conditions and personal requirements

ND5, D10, D12F10, F15, F20, F25R/M

July 2013Ian Cook 12

“N” Settings‘N’ settings: Night or Now Mode:Responds to breathing actions at all altitudes

with standard delivery protocols. “Set and fly”.Flow commences at your starting altitude, at a

equivalent rate of 1 L/minute @ 10,000 ftFlow increases automatically with heightRecommended that all pilots use this setting

for the majority of flights.


“D” SettingDay or Delayed ModeSetting available ‘D5, D10, D12The EDS unit does not start delivering O2 till you

reach the preselected pressure altitude setting. D5 - commences at 5,000ft

D10 – commences at 10,000ftOn D12 the unit does not start delivering O2 till a

pressure altitude of 12,000’ is reached.Flow rate of equivalent to 1.2 L/m Recommended that you use the D5 settingFlow increases automatically with height


“F” Setting‘F’ settings: Floor or MaskSettings ‘F10,F15, F20,F25Each settings cause the EDS unit to ADD

additional O2 equivalent to the indicated setting.’Setting F10At 8000’ the effective flow rate is 0.8 L/m + 1.0

L/m =1.8 L/mSetting ‘F20’At 4000’ you receive 0.4 L/m + 2.0 L/m =2.4 L/mF settings to be used with face maskUseful if a smoker or have a respiratory

conditionFlow increases automatically with height


R/M Setting‘R/M’ settings: Reserve / ManualThis setting causes the EDS unit to respond

to breathing actions with a fixed pulse length of 1/2 sec, regardless of pressure altitude.

Equates to 100% O2 for conventional systems

.Effective flow rate of 10 L/m.

Used as an emergency setting and allows deep inspiration breathing and maximum absorption.



Use the EDS Nasal Cannula for flight operations up to 18,000ft AMSL


Press nose clip

to fit

Pull elastic

both sides to snug fitPlace

elastic above ears

Never try to change

from a cannula to mask at above 10,000ft

Only mask above 18.000 with EDS 1

(FAA STD)

Mask Operation

AlarmsThe EDS unit has audio and visual (red LED)

alarms.Flow faultPinched line to EDS unit. (Personal experience line pinched on

undercarriage lever)O2 supply removedBattery power to low to activate valves. (Go to R/M setting)

APNOEA AlarmQuite breathing for 45 secOutlet Cannula disconnectedOutlet Cannula tube pinched


Using OxygenAbove 18,000ft FAA recommend full mask

rather than just nasal prongs. *See note 1

MUST be on by 10,000ft ‘GFA requirement’MUST trigger oxygen with each breath –

this usually means breathe IN through noseAlarms sounds if 45 seconds elapse without

breathing through nose, oxygen supply run out, battery power low, pinched line on HP or LP side or disconnected.


Using OxygenIf you have a beard, a good mask seal is difficult

or impossible.Trim very short or remove beard prior to using

masks.“For some of us beards makes us look younger and more

dashing (Ladies excepted)”

You risk hypoxia at altitude!A risk with using a cannula at high altitude is

that you may breath through your mouth and you will go hypoxic very quickly.

If using a mask it does not matter if your breath through your mouth or nose


Low battery alarmIf Low Battery fault warning LED is on.

Insert jack to reserve battery. Check system OK.

If battery fault alarm still on press to last button position – R/M mode

(reserve/manual) – gives half second oxygen pulses.

Airbrakes deployed, undercarriage down, and descend as quickly as safety allows.

Don’t exceed Vne!This means well below 10,000ft


Alarms If any flow or fault alarms remain on and

the fault cannot be diagnosed and fixed within I minute.

press to last button position – R/M mode (reserve/manual) – gives half second oxygen pulses.

Airbrakes deployed, undercarriage down, and descend as quickly as safety allows.

Don’t exceed Vne!This means well below 10,000ft


Summary

Recommended to use the ‘N’ setting & use oxygen on all flights except local or low

altitude. If older, respiratory problems etc.

use “F” settingsRegularly Check your Oxygen system

and know its functions.“It is your life that you may be putting at risk”.


Decanting Tool


CO-PILO2T KitThe CO-PILOT oxygen system is a small, light-weight, hand-held oxygen system. Precision manufactured in Japan, this unit was especially designed for supplemental breathing while at high altitudes. The regulator has an on/off and volume control knob adjustable from off to a max setting of 2-ltr./min. The removable face mask can be replaced by an optional Oxymizer cannula for continuous "hands off" operation. Each 18 liter replacement cylinder lasts up to 30 minutes at 15,000 ft. The regulator can hold a cylinder for several months without any noticeable drop in pressure. Cylinders


Ian Cook July 2013Ian Cook1. Hypoxia What is hypoxia and what can happen with prolonged hypoxia?...

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