Can VPAP ST-A do what ASV does?

ajack wrote:my s9 st, doesn't have a pressure pulse and scores both central and obstructive as an unclassified. Does the st-a have a pressure pulse to distinguish between the two?

are you not paying attention? resmeds don't use pressure pulses.

whether or not your machine uses FOT or not is another question, however, it's unlikely that it does, since it doesn't need to differentiate, since it's not going to do anything about either... since it's not an auto.

I wasn't paying attention, I was combining fot and pressure pulse, silly me.. I was more focused on what machines were giving ca and oa data in which modes. I edited as you were writing to say that in cpap mode, the s9 st tells the difference between ca and oa and I used respironics tech name instead of fot again.

do you know if the st-a flags ca and oa? because I don't and I'm now curious.

ajack wrote:I wasn't paying attention, I was combining fot and pressure pulse, silly me.. I was more focused on what machines were giving ca and oa data in which modes. I edited as you were writing to say that in cpap mode, the s9 st tells the difference between ca and oa and I used respironics tech name instead of fot again.

do you know if the st-a flags ca and oa? because I don't and I'm now curious.

it's never come up,

why don't you try doing some research, download some manuals, google up some charts from people that have one, see what you can find out... and maybe keep your terms straight, so that you can actually find what you're looking for, it helps.

xxyzx wrote:resmed uses a small 4 cycle pulse to check for impedance change

no. not a "small 4 cycle pulse"

xxyzx wrote:there is no pulse with resmed

egad, he's not 100% wrong.

xxyzx wrote:they have other ways to see if you are trying to breathe or not

no

xxyzx wrote:when blocked they increase pressure to clear it

no

xxyzx wrote:when open they give you the target Vt and RR to keep you ventilated

not really

xxyzx wrote:they are not pumping air in to check for compliance of the lung
as stretching would cause CA due to the hering breuer effect

no

xxyzx wrote:i will check the philips manual latertoday that explains there method

unlikely

xxyzx wrote:try learning what hering breuer is before you dismiss it

I did, you're wrong.