Interesting article on autotitrating PAP. A little dated but still educational.
http://www.sleepreviewmag.com/Articles. ... d=S0305F04
How AutoPAP Works
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rested gal
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Very interesting, yes. Thanks for the link, Guest!
The most interesting comment to me in that article was:
"Specifically, response to snoring was not evaluated. In addition, patient adaptation was not allowed for. A real patient would hopefully correct their abnormal breathing pattern as the pressure increased.
The auto-adjusting devices in this study did not have the opportunity to see any correction, so they may have responded differently if the abnormality was corrected."
Yes, things could have been very different having real patients using all the machines in turn. Of course no conditions would be the same even in the same patient, for each machine trial.
I did some Googling after reading the article, to see if I could find the names of the machines used - to see just how "dated" the machines themselves might have been.
Turned up this, which appears to be the same study, with more detail, including naming machine names within the study itself:
PERFORMANCE OF AUTO-ADJUST NASAL CPAP DEVICES IN A SIMULATION OF VARIED PATIENT BREATHING Peter Bliss BME, Todd Eiken RPSGT, Robert McCoy RRT - A version of this paper was presented at the AARC International Congress December, 2001 San Antonio, Texas.
The machines listed in the PDF file of the study on that site were:
ResMed's Autoset T, DeVillbiss AutoAdjust LT, Tranquility, and Puritan Bennett's GoodKnight 418P.
Older machines, indeed. I realize that Healthdyne (makers of the Tranquiity) were bought out by Respironics - don't know if that happened before or after the study.
________________________________
Interestingly, in a question (self-serving, perhaps? ) and answer I found elsewhere, the names of the machines were different:
Question from the CEO of ResMed
I read with considerable interest the article “Exploring Auto-Adjust Nasal PAP” by Peter Bliss, BME; Robert McCoy, BSM, RRT; and Todd Eiken, RPSGT, in the May/June issue.
The article was well written with one minor blemish: it was left to the reader to guess the possible manufacturers of the four auto-titrating devices that Bliss and company evaluated. I suspect that ResMed’s AutoSet® Spirit was one of the units evaluated.
Could you please take away the mystery and let readers know which other devices were part of this evaluation?
Peter C. Farrell, Chairman and CEO of ResMed, Poway, Calif
The answer given to his question:
The four units evaluated were Respironics’ Virtuoso®, Respironics’ REMstar® Auto, Nellcor Puritan Bennett’s GoodKnight 418A, and ResMed’s AutoSet®T.
Not the same names of machines I saw listed in the PDF of the Bliss study paper at cardinal.com. Same study? Different study? Confusing, but interesting.
My edit: The link I posted is broken. Here's a link to the Bliss, Eiken, McCoy bench study of 2001:
http://www.inspiredrc.com/AUTO2001a.PDF
The most interesting comment to me in that article was:
"Specifically, response to snoring was not evaluated. In addition, patient adaptation was not allowed for. A real patient would hopefully correct their abnormal breathing pattern as the pressure increased.
The auto-adjusting devices in this study did not have the opportunity to see any correction, so they may have responded differently if the abnormality was corrected."
Yes, things could have been very different having real patients using all the machines in turn. Of course no conditions would be the same even in the same patient, for each machine trial.
I did some Googling after reading the article, to see if I could find the names of the machines used - to see just how "dated" the machines themselves might have been.
Turned up this, which appears to be the same study, with more detail, including naming machine names within the study itself:
PERFORMANCE OF AUTO-ADJUST NASAL CPAP DEVICES IN A SIMULATION OF VARIED PATIENT BREATHING Peter Bliss BME, Todd Eiken RPSGT, Robert McCoy RRT - A version of this paper was presented at the AARC International Congress December, 2001 San Antonio, Texas.
The machines listed in the PDF file of the study on that site were:
ResMed's Autoset T, DeVillbiss AutoAdjust LT, Tranquility, and Puritan Bennett's GoodKnight 418P.
Older machines, indeed. I realize that Healthdyne (makers of the Tranquiity) were bought out by Respironics - don't know if that happened before or after the study.
________________________________
Interestingly, in a question (self-serving, perhaps? ) and answer I found elsewhere, the names of the machines were different:
Question from the CEO of ResMed
I read with considerable interest the article “Exploring Auto-Adjust Nasal PAP” by Peter Bliss, BME; Robert McCoy, BSM, RRT; and Todd Eiken, RPSGT, in the May/June issue.
The article was well written with one minor blemish: it was left to the reader to guess the possible manufacturers of the four auto-titrating devices that Bliss and company evaluated. I suspect that ResMed’s AutoSet® Spirit was one of the units evaluated.
Could you please take away the mystery and let readers know which other devices were part of this evaluation?
Peter C. Farrell, Chairman and CEO of ResMed, Poway, Calif
The answer given to his question:
The four units evaluated were Respironics’ Virtuoso®, Respironics’ REMstar® Auto, Nellcor Puritan Bennett’s GoodKnight 418A, and ResMed’s AutoSet®T.
Not the same names of machines I saw listed in the PDF of the Bliss study paper at cardinal.com. Same study? Different study? Confusing, but interesting.
My edit: The link I posted is broken. Here's a link to the Bliss, Eiken, McCoy bench study of 2001:
http://www.inspiredrc.com/AUTO2001a.PDF
Last edited by rested gal on Fri Feb 29, 2008 10:05 am, edited 2 times in total.
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