New? Free Sign Up
Then check our Welcome Center to a Community Caring about Sleep Apnea diagnosis and Sleep Apnea treatment:
CPAP machines, Sleep Apnea surgery and dental appliances.
Tags:
Are you talking about the "anti asphyxiation" valve?
It is supposed to stay open and cover up the hole above when CPAP is turned on. I'm not sure how it's even possible for it to close if the pressure from CPAP is on. If it is closing some reason while on, then you have a problem. But...you say that the machine is on and reading 14cmH20. This is one of those problems that are hard to fix remotely.
Its purpose is that if power cuts off and your machine goes off, the flap falls down allowing outside air in. This is just so that you don't suffocate with a full face mask.
I guess I'm not 100% sure what your question is, but I'd love to help you out if I could.
Saz
We have the same problem in the lab sometimes. It can be really annoying.
The anti-asphyxiation valve, to which it sounds like you are describing, will close or partially close if it becomes obstructed. You can manually simulate it by simply placing your finger over the exterior opening. When you remove your finger, you get a pressure "thump". The same thing happens if blankets, or other foreign materials should block the valve port.
The reason that this occurs is that a negative air pressure develops on the outward side of the flapper when the port is blocked. It doesn't affect the valves operation. The "shock" and sound are just startling.
Several suggestions:
1. Review your sleep environment.
2. Look at your sleep positions.
Adjust accordingly to minimize blocking the port.
i broke my anti asphixiation valve last sunday night by coughing in my mask
i was trying to put a bandage on it so as not to block it
but monday i had a new new mask and all is well
The anti-asphyxiation valve, to which it sounds like you are describing, will close or partially close if it becomes obstructed. You can manually simulate it by simply placing your finger over the exterior opening. When you remove your finger, you get a pressure "thump". The same thing happens if blankets, or other foreign materials should block the valve port.
The reason that this occurs is that a negative air pressure develops on the outward side of the flapper when the port is blocked. It doesn't affect the valves operation. The "shock" and sound are just startling.
Several suggestions:
1. Review your sleep environment.
2. Look at your sleep positions.
Adjust accordingly to minimize blocking the port.
I have a question..shouldn't my DME know about this stuff?
Dan Lyons said:The anti-asphyxiation valve, to which it sounds like you are describing, will close or partially close if it becomes obstructed. You can manually simulate it by simply placing your finger over the exterior opening. When you remove your finger, you get a pressure "thump". The same thing happens if blankets, or other foreign materials should block the valve port.
The reason that this occurs is that a negative air pressure develops on the outward side of the flapper when the port is blocked. It doesn't affect the valves operation. The "shock" and sound are just startling.
Several suggestions:
1. Review your sleep environment.
2. Look at your sleep positions.
Adjust accordingly to minimize blocking the port.
Christine,
Please take it easy on this old guy. My sides now hurt from the laughing.
DME's are like car salesmen. Look here, want it, fill out the forms, thank you and last thing you see, is they are standing by the window laughing uncontrollably as you walk to your car.
What they do know is how to check your insurance card and credit so they can complete the sale.
The unfortunate thing is the majority are like this. The good ones are few and far between.
Christine C said:I have a question..shouldn't my DME know about this stuff?
Dan Lyons said:The anti-asphyxiation valve, to which it sounds like you are describing, will close or partially close if it becomes obstructed. You can manually simulate it by simply placing your finger over the exterior opening. When you remove your finger, you get a pressure "thump". The same thing happens if blankets, or other foreign materials should block the valve port.
The reason that this occurs is that a negative air pressure develops on the outward side of the flapper when the port is blocked. It doesn't affect the valves operation. The "shock" and sound are just startling.
Several suggestions:
1. Review your sleep environment.
2. Look at your sleep positions.
Adjust accordingly to minimize blocking the port.
Well, I thought you might want a little chuckle...I am finding that my local DME is like a thorn in my side. They have done NOTHING for me. If it weren't for this site and the members, I would be in the dark.
I asked them today if they could track where my order for my new mask is and of course the girl said that she would get back to me..Its a good thing I didn't hold my breath on that one. If I did I would be about 3 shades of blue by now.
Dan Lyons said:Christine,
Please take it easy on this old guy. My sides now hurt from the laughing.
DME's are like car salesmen. Look here, want it, fill out the forms, thank you and last thing you see, is they are standing by the window laughing uncontrollably as you walk to your car.
What they do know is how to check your insurance card and credit so they can complete the sale.
The unfortunate thing is the majority are like this. The good ones are few and far between.
Christine C said:I have a question..shouldn't my DME know about this stuff?
Dan Lyons said:The anti-asphyxiation valve, to which it sounds like you are describing, will close or partially close if it becomes obstructed. You can manually simulate it by simply placing your finger over the exterior opening. When you remove your finger, you get a pressure "thump". The same thing happens if blankets, or other foreign materials should block the valve port.
The reason that this occurs is that a negative air pressure develops on the outward side of the flapper when the port is blocked. It doesn't affect the valves operation. The "shock" and sound are just startling.
Several suggestions:
1. Review your sleep environment.
2. Look at your sleep positions.
Adjust accordingly to minimize blocking the port.
© 2025 Created by The SleepGuide Crew.
Powered by