(04-20-2015, 10:34 AM)Mark Douglas Wrote: If this is correct using any PAP machine will raise the possibility of induced CSA.
Central Sleep Apnea (CSA) is a condition and you have to meet certain clinical parameters to be diagnosed with it. It involves the body not breathing even though the airway is open. In a sleep study a chest belt confirms that there is no effort to breathe.
Obstructive Sleep Apnea (OSA) is a condition and you have to meet certain clinical parameters to be diagnosed with it. It involves the body not breathing because the airway is collapsed. In a sleep study a chest belt confirms that there is an unsuccessful effort to breathe.
To be diagnosed with any type of sleep apnea the frequency of events (apneas and hypopneas) must be 5 per hour or greater. Less than that, even though you can still experience both central and obstructive apneas, you do not meet the criteria to be diagnosed with the condition, you are deemed "normal" and sent home with no prescription for CPAP therapy. If you snore you may benefit from somnoplasty or a dental appliance.
Fully data-capable CPAP machines emit pressure pulses during apneas in an attempt to determine if the airway is open or obstructed. Auto-adjusting CPAP machines can raise the pressure if the airway is obstructed, but they will purposely not raise the pressure if the airway is clear.
Some patients will develop an increase in the frequency of central apnea events in response to CPAP therapy. The theory is that the oxygen level in the blood is so high that the brain doesn't trigger the body to breathe. The fact that lowering the pressure can reduce the frequency of these central apnea events seems to support that theory.
Apnea Board Moderator