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Question 26

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Question 26- Why would cpap pressure change in short period of time?



I recently found my CPAP was over titrated by nearly 50%. It was originally set to those numbers after a sleep study at the same facility in January of this year.

Why would my need for air pressure fluctuate so widely in such a short time (I have lost NO weight)? And, how can I know I'm receiving appropriate titration in the future since it seems to fluctuate so widely over a short period of time (I began having adverse symptoms in August)?


Answer Provided by Sandman
October 23, 2008

Typically a decrease of this amount would be unusual but not too rare.

Sometimes, when you are first titrated, there is a lot of inflammation and edema in the throat area due to the stress of apneas. After using cpap for a short period of time the swelling will decrease and the pressure requirement may go down.

Daily requirements for pressure can change due to several factors. If you have a cold, drink alcohol, take certain medications, the pressure requirements can go up. Sleeping position can effect pressure requirements.

If in the first study you were sleeping on your back and in the second study you were sleeping on your side, the pressure requirements can change. If your symptoms have come back you should contact your sleep doc. He may change setting without another study since you were on a much higher pressure after the first study. Let him know if snoring is involved.

Snoring is an indication of the pressure not being high enough. Not everyone with sleep apnea snores so that may no be an option. You may want to have your machine checked to see if it is actually putting out the correct pressure.

Another option is trying a auto-titrating device set just below that last pressure and just above the previous pressure. Then on nights when you need more pressure it will automatically increase the pressure and visa-versa.

Best wishes and Sweet dreams,


Disclaimer, I am not an MD and my opinions should not be taken as medical advice. If you feel that you need assistance with medications and/or diagnosis, you should seek medical advice from a qualified physician.

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