Please explain how Resmed VPAP pressures work

[Perlina]

I would like to set the pressures on my Resmed S9 VPAP machine. Can anyone clearly explain to me how these pressures relate? I understand there has to be some range between the min EPAP and Max IPAP values, but I don't know specifically what it is, and I don't understand how it works. Thank you.

[STL Mark]

I would like to set the pressures on my Resmed S9 VPAP machine. Can anyone clearly explain to me how these pressures relate? I understand there has to be some range between the min EPAP and Max IPAP values, but I don't know specifically what it is, and I don't understand how it works. Thank you.

I would advise reading the clinicians manual on the specific machine you have. You will get a better education of the overall functions of the machine. There are now over 6 different S9 VPAP models. It will also be helpful to determine which one you have. Some of those models are: VPAP S, VPAP Auto, VPAP Adapt 36007, VPAP Adapt (eASV) 36037, VPAP ST, VPAP ST-A (iVAPS), VPAP COPD. Some of these machines also have multiple modes that can effect therapy.

[jnk]

One way to run in auto mode with a ResMed autobilevel is to set the minimum and maximum more than 4cm apart and then to set the PS (pressure support, also called a delta) at the standard of 4cm.

There are many variations to that theme, depending on what your doc is trying to treat and why, though, as I understand it.

[Pugsy]

Which VPAP machine? The S or the Auto or the VPAP used for treating centrals?

Assuming the "plain" VPAP S or Auto (as opposed to the ASV type used for centrals) generally we say EPAP for obstructive apneas and IPAP for hyponeas and the pressure support is mainly for comfort with 4 or 5 being the most commonly used PS.
We need EPAP to function similarly to minimum pressure on an APAP machine...high enough to do a good job holding the airway open in general to help prevent the collapse of the airway for the most part.

So it depends on which VPAP you are using and why is it being used? Is it being used because of aerophagia or other issues pertaining to simple discomfort exhaling against the pressures or is there some other reason?

[jnk]

In support of Pugsy's points, here is a list of basic ResMed titration guidelines as they relate to lab protocols. Page 23 is the start of VPAP info.

http://www.resmed.com/us/documents/1013 ... -guide.pdf