Re: SEC: UNCLASSIFIED:-Flight Physiology

["Marty Mangan" <mca115@hotmail.com>]

Well spoken on the flight physiology assessment. It sounds like you hang out 
in the pages of Guyton!

Marty






>From: Bevan.Nylund@defence.gov.au
>Reply-To: flightmed@flightweb.com
>To: flightmed@flightweb.com
>Subject: SEC: UNCLASSIFIED:-Flight Physiology
>Date: Wed, 4 Dec 2002 08:03:20 +1000
>
>
>Allan.
>
>As you are aware, humans adapt to altitude when they are physiologically
>well. The knowledge of these adaptations and mechanisms is the cornerstone
>of altitude physiology. When there is physiological disruption by disease
>or injury, then the adaptation mechanisms may not be viable.
>
>How I do my assessments is:
>
>For all patients.
>
>       Look at the major systems involved in the adaptation process, which
>is primarily the cardiovascular and respiratory systems. If they are
>functioning, and have some physiological reserve, then there will not be a
>problem. Often disease in one may be compensated if the other is normal.
>Cardiorespiratory disease together often requires some intervention.
>The second quick check is for trapped gases, which is another common
>problem area. Can the patient Valsalva or Toynbe, and is there a
>possibility of a gut obstruction. These two checks can take as little as 30
>seconds if the patient obviously has no problems, and if they do no more
>than 10 minutes.
>
>Regardless of the primary presenting complaint, I always do these checks.
>It is not always the presenting complaint that brings you unstuck during
>flight.
>
>Problem specific:
>
>       Look at the presenting complaint or injury. How will ascent to
>altitude in an aircraft affect the body in relation to the presenting
>problem. I.e. gut problems will relate to trapped gases. Cardiac - altitude
>hypoxia, respiratory altitude hypoxia and / or trapped gases. Recent
>surgery or bleeding, vibration and turbulence. It becomes quite easy after
>a while.
>
>Once you identify a problem area, i.e a particular adaptation to the
>altitude environment is impaired or absent, then you can formulate a plan
>to get around the problem. - oxygen supplementation, cabin altitude
>restriction, modified flight plan etc etc.
>
>
>I hope this helps.
>
>Regards
>
>Bevan Nylund
>Senior Nursing Officer
>Army Aviation Centre
>Oakey, Australia
>
>
>
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