Tidal volume varies
Tidal volume varies
I live in the north east and my tidal volume is usually around 500. I am in Denver now and my tv has been running around 380. No changes were made at all, could it be due to the altitude?
- ChicagoGranny
- Posts: 14754
- Joined: Sun Jan 29, 2012 1:43 pm
- Location: USA
Re: Tidal volume varies
Compare your respiratory rates for the two locations.
Re: Tidal volume varies
Suggest comparing the minute ventilation rates for the two locations. The minute ventilation is the volume of (respired) air per minute. (Combines respiration rate and tidal volume into one factor.
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Re: Tidal volume varies
As far as respiration rates they are the same, the minute ventilation has decreased.
Re: Tidal volume varies
Well that’s not what might have been anticipated considering the altitude change.
Do you have any data on changes in your blood O2 saturation?
(Ultimately the whole purpose of the respiratory system is to maintain adequate O2 saturation and blow off excess CO2.)
Do you have any data on changes in your blood O2 saturation?
(Ultimately the whole purpose of the respiratory system is to maintain adequate O2 saturation and blow off excess CO2.)
_________________
Machine: AirSense 11 Autoset |
Mask: FlexiFit HC431 Full Face CPAP Mask with Headgear |
Humidifier: DreamStation Heated Humidifier |
"THE INFORMATION PROVIDED ON CPAPTALK.COM IS NOT INTENDED NOR RECOMMENDED AS A SUBSTITUTE FOR PROFESSIONAL MEDICAL ADVICE."
Re: Tidal volume varies
I’m on vacation and don’t have access to my oximeter.
- ChicagoGranny
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- Joined: Sun Jan 29, 2012 1:43 pm
- Location: USA
Re: Tidal volume varies
Chicago granny, thanks for your reply. Feel the same, no changes. My respiratory rate is the same, no leaks . Just that my tv is around 380 instead of my usual 500.
- ChicagoGranny
- Posts: 14754
- Joined: Sun Jan 29, 2012 1:43 pm
- Location: USA
Re: Tidal volume varies
My emphasis:ResMed wrote:Tidal Volume is an estimate of quantity of inhaled air
per breath, calculated as an integral of respiratory flow:
based on the leak flow, the mask vent flow and the
total flow rate. The display is based on a five-breath
moving average, updated every breath.
Now, this it me trying to undertand:
If tidal volume is the amount of air
And if there's less air at higher altitude
Doean't it stand to reason that tidal volume would be lower?
Or is there something I'm missing?
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- ChicagoGranny
- Posts: 14754
- Joined: Sun Jan 29, 2012 1:43 pm
- Location: USA
Re: Tidal volume varies
The machine has been tested to adjust to air density up to 9500 feet. Denver is about 5200 feet. So, the user should be breathing air of the same density at both locations.
Re: Tidal volume varies
Agreed Chicagogranny but there must be a reason why this is happening.
- ChicagoGranny
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- Joined: Sun Jan 29, 2012 1:43 pm
- Location: USA
Re: Tidal volume varies
Good point of curiosity. I would like to see the OSCAR Overview chart of TV for the first few days at elevations one and two.