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HOW DO WE BREATH IN THESE MASKS?
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racprops Offline

Preferred Members-2

Posts: 260
Joined: Mar 2013

Machine: Respironics DS960HS
Mask Type: Full face mask
Mask Make & Model: Respironics FitLife FFM
Humidifier: Respironics
CPAP Pressure: ????
CPAP Software: SleepyHead EncoreBasic

Other Comments:

Sex: Male
Location: Phoenix AZ

Post: #1
HOW DO WE BREATH IN THESE MASKS?
Now for another off the wall question:

Our systems maintain a positive constant air pressure and air flow, even my ASV machine does this.


SO how do we exhale?? How does the CO2 get out??


Or are we rebreathing our own air??

I note a small flap in my mask and thought it must close when I exhale to vent my CO2 out the steady air vents in the elbow of the hose.

BUT I watched it with a flashlight and once the system is up and running it never closed.

And as these systems do not vacuum the air out even during exhale, and there is no exhaust vent anywhere, so there is nowhere for our exhaled breath to go.

Note I am using a full face mask so there is no in by the nose and out by the mouth here...

It is a closed system we are like a car breathing its own tail pipe. In the case of a car, as combustion is so poor, a car can rebreath some of its exhaust and run..and would think we can too, UP to a point where we and the car engine has burned all the left over gas and O2 or in our cases the O2 and fill up with CO2...

So after a couple of hours how much Co2 are we rebreathing? The machine can only push so much o2.

I have to say this deeply scares me.

Rich
05-10-2013 05:19 AM
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racprops Offline

Preferred Members-2

Posts: 260
Joined: Mar 2013

Machine: Respironics DS960HS
Mask Type: Full face mask
Mask Make & Model: Respironics FitLife FFM
Humidifier: Respironics
CPAP Pressure: ????
CPAP Software: SleepyHead EncoreBasic

Other Comments:

Sex: Male
Location: Phoenix AZ

Post: #2
RE: HOW DO WE BREATH IN THESE MASKS????
I feel honor bound to report this:

There is some exhaust out the mask hose vents.

As I was getting ready to go back to sleep I had my hand partly over the vents and I could make out a slight but notable change in the sound of the air flow.

Puffing hard make it even more so.

So positive proof of some venting of our breath.

So in the words of Sat. Night skit: Never mind….

Rich
05-10-2013 06:20 AM
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zonk Offline

Advisory Members

Posts: 7,908
Joined: Feb 2012

Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #3
RE: HOW DO WE BREATH IN THESE MASKS????
(05-10-2013 06:20 AM)racprops Wrote:  I feel honor bound to report this:

There is some exhaust out the mask hose vents.
All masks have vents holes allows exhaled air to escape and different masks have different leak rates (intentional leak) at various pressure settings
For example, FullLife intentional leak @ 15 = 32 L/min

Full face masks also have anti-asphyxia valve, allows fresh air inside the mask in case the machine shut off during the night so you don,t suffocate
05-10-2013 06:48 AM
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racprops Offline

Preferred Members-2

Posts: 260
Joined: Mar 2013

Machine: Respironics DS960HS
Mask Type: Full face mask
Mask Make & Model: Respironics FitLife FFM
Humidifier: Respironics
CPAP Pressure: ????
CPAP Software: SleepyHead EncoreBasic

Other Comments:

Sex: Male
Location: Phoenix AZ

Post: #4
RE: HOW DO WE BREATH IN THESE MASKS????
Check I know that...

It did seem there was no venting during full operation, so I thought the air flow overpower any output I made...until I found a way to show there was I was posting this question.

The mods can delete this or leave it so other questioning this can find it and get the answer.

Rich


(05-10-2013 06:48 AM)zonk Wrote:  
(05-10-2013 06:20 AM)racprops Wrote:  I feel honor bound to report this:

There is some exhaust out the mask hose vents.
All masks have vents holes allows exhaled air to escape and different masks have different leak rates (intentional leak) at various pressure settings
For example, FullLife intentional leak @ 15 = 32 L/min

Full face masks also have anti-asphyxia valve, allows fresh air inside the mask in case the machine shut off during the night so you don,t suffocate
(This post was last modified: 05-10-2013 06:54 AM by racprops.)
05-10-2013 06:54 AM
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