Medevac Question

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Galaxy
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Medevac Question

#1 Post by Galaxy » Wed Aug 26, 2015 8:27 pm

Why Are block altitudes sometimes requested by medevac flights?
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PostmasterGeneral
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Re: Medevac Question

#2 Post by PostmasterGeneral » Thu Aug 27, 2015 9:38 am

On the King Air 200, FL180 equates to about a 1500' cabin altitude (depending on how old and shitty your plane is of course.) :rolleyes: low cabin altitudes are often required for patient stability and comfort, depending on the ailment. You don't want someone with a brain bleed to be experiencing cabin pressure changes.

If the altimeters are too low, ATC can't assign you FL180 because of loss of separation from anyone at 190. Because of this, the only way to actually fly at 18,000' is to get a block altitude (17,000-FL190) to ensure proper separation. Hope that answers your question.
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adster1989
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Re: Medevac Question

#3 Post by adster1989 » Thu Aug 27, 2015 2:11 pm

Could also be that they are riding just at tops of clouds and picking up icing, or getting into turbulence....sometimes only need that extra couple hundred feet. Its helpful rather than climbing another 2000 ft to next alt
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Cessna driver
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Re: Medevac Question

#4 Post by Cessna driver » Tue Sep 01, 2015 6:03 pm

adster1989 wrote:Could also be that they are riding just at tops of clouds and picking up icing, or getting into turbulence....sometimes only need that extra couple hundred feet. Its helpful rather than climbing another 2000 ft to next alt


Gotta love cloud surfing on empty legs ;)
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Galaxy
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Re: Medevac Question

#5 Post by Galaxy » Wed Sep 02, 2015 7:23 am

Thank you for the answers.
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SuperchargedRS
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Re: Medevac Question

#6 Post by SuperchargedRS » Wed Sep 02, 2015 8:39 am

PostmasterGeneral wrote:On the King Air 200, FL180 equates to about a 1500' cabin altitude (depending on how old and shitty your plane is of course.) :rolleyes: low cabin altitudes are often required for patient stability and comfort, depending on the ailment. You don't want someone with a brain bleed to be experiencing cabin pressure changes.

That.
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adster1989
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Re: Medevac Question

#7 Post by adster1989 » Wed Sep 02, 2015 10:14 am

Cessna driver wrote:
adster1989 wrote:Could also be that they are riding just at tops of clouds and picking up icing, or getting into turbulence....sometimes only need that extra couple hundred feet. Its helpful rather than climbing another 2000 ft to next alt


Gotta love cloud surfing on empty legs ;)


never gets old! ;)
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co-joe
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Re: Medevac Question

#8 Post by co-joe » Tue Oct 20, 2015 7:51 am

Not just brain bleeds, but blood O2 saturation levels of the patient are always continuously monitored throughout the flight so small changes can be critical for a patient that isn't breathing on their own.

It's neat to see on dead legs to put the o2 sat meter thing on your finger and then climb to altitude and see the change. Bandaid might have more knowledge but I think we hover around 97%, as your cabin altitude climbs you drop to even 95% which can be a big deal. Then throw the supplementary O2 mask on and watch it climb again. Just a fun human physiology thing you can play with.


Also in the above example, if 180 was you'rdesired altitude, the request would be; "wrong way 17000 blocking wriong way 190". ATC must love medevacs.
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