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Re: Does your AHI make a difference in how you feel ?
Posted: Tue Sep 21, 2010 9:23 pm
by tony72
how do cpap machines sense apneas?
Re: Does your AHI make a difference in how you feel ?
Posted: Tue Sep 21, 2010 9:36 pm
by Wulfman
tony72 wrote:how do cpap machines sense apneas?
The machines have sensors and sophisticated software programmed in them. They determine "events" by the flow of air going through the machine and responses in breathing by the user. By definition, an "apnea" is the lack of breathing for at least 10 seconds. Consequently, if the machine senses a "no breathing" condition for at least 10 seconds, it believes there is an apnea occurring.
Den
Re: Does your AHI make a difference in how you feel ?
Posted: Tue Sep 21, 2010 10:52 pm
by elena88
The answer for me is no, I feel the same whether I have a 7.0 ahi or a 0.4 night.. and that is with really low leak rate too..
Re: Does your AHI make a difference in how you feel ?
Posted: Tue Sep 21, 2010 11:13 pm
by ozij
Wulfman wrote:tony72 wrote:how do cpap machines sense apneas?
The machines have sensors and sophisticated software programmed in them. They determine "events" by the flow of air going through the machine and responses in breathing by the user. By definition, an "apnea" is the lack of breathing for at least 10 seconds. Consequently, if the machine senses a "no breathing" condition for at least 10 seconds, it believes there is an apnea occurring.
Den
They analyse the flow context as well to determine the disruption. Which is why you can rarely cheat a machine into thinking you have an apnea by stopping your breath - awake breathing is generally much too irregular.