Full mask vs nasal mask: different AHI numbers?

[arthuref]

I was using a nasal mask for a long time, and recently switched to full mask (due to extremely dry mouth). Seems like my AHI numbers are a bit higher.

Is is possible that a full mask could be less effective than nasal mask in treating the OSA (assuming there aren't more leaks, etc)?

I need to gather more data, but just wondering if the two types of masks should be equally effective in terms of reducing apnea events.

[Pugsy]

Sometimes people need to use a little more pressure when using a full face mask than when using a nasal mask.
Not so much because it isn't as effective but because sometimes that lower strap on the full face masks alter the airway position a little and make it harder to keep the airway open.

If everything was equal...wouldn't matter but full face masks can alter the position of the jaw and airway just a little so that makes everything not equal.

[arthuref]

Sometimes people need to use a little more pressure when using a full face mask than when using a nasal mask.
Not so much because it isn't as effective but because sometimes that lower strap on the full face masks alter the airway position a little and make it harder to keep the airway open.

If everything was equal...wouldn't matter but full face masks can alter the position of the jaw and airway just a little so that makes everything not equal.

Ah, that makes sense--thanks.

[palerider]

Sometimes people need to use a little more pressure when using a full face mask than when using a nasal mask.
Not so much because it isn't as effective but because sometimes that lower strap on the full face masks alter the airway position a little and make it harder to keep the airway open.

If everything was equal...wouldn't matter but full face masks can alter the position of the jaw and airway just a little so that makes everything not equal.

Ah, that makes sense--thanks.

I think my pressure needs went down a couple CMs when I switched from the FFM to a nasal mask, and I've heard similar things from a number of people over the years... FFMs work, and work great for people... but those that can, or choose to, use a nasal or pillow mask often find that a little less pressure gets the job done.