Swift with an Adapt SV

jammin · Post by **jammin** » Sat Jun 02, 2007 3:08 pm

I'm about a month into my experience with the Adapt SV, and overall it's gone pretty well. After a week or so I gave up on the UMFF mask I started with because I couldn't overcome the leaks, which always seemed to worsen just as I would begin to doze off. It may not have been the best fit to start with, but that's another issue. I got the DME to sell me a Swift Nasal Pillow setup and have been more comfortable and successful with it. Though it has it's own leak issues, they seem more manageable, and I got the hint about taping the mouth closed from another thread here - that helped a lot. Of course, the Swift isn't approved for the SV, and I've noticed the posts above that talk about the recommended masks. Are any others using swift with the sv, and is there any significant downside to using it?

One other question: The backup respiration rate of 15 breaths per minute is way faster than I normally breathe when I'm resting. Is that an absolute unchangeable setting on the SV? Is it a minimum threshold for healthy breathing when asleep?

rested gal · Post by **rested gal** » Sat Jun 02, 2007 3:18 pm

jammin wrote:One other question: The backup respiration rate of 15 breaths per minute is way faster than I normally breathe when I'm resting. Is that an absolute unchangeable setting on the SV? Is it a minimum threshold for healthy breathing when asleep?

I don't have that machine...don't need it... but from reading about it, it's my understanding that the backup rate of 15 BPM is unchangeable.

And, as I understand it... the backup rate is not going to kick in unless the machine can not normalize the central apneas with its usual operation. The machine is not going to be using the backup rate right from the get-go, the way a bi-level ST machine that's been set for using a timed backup rate would do.

Check out christinequilts' earlier posts in this thread:
viewtopic.php?t=11458
Jul 22, 2006 subject: Resmed VPAP Adapt SV - for Central Sleep Apnea

I think I remember one of her posts explaining that the fixed backup rate of 15 bpm is more like a failsafe thing that the machine will fall back on only if necessary.

My edit: was to include the link to the thread.

DP · Post by DP » Sat Jun 02, 2007 4:06 pm

The Swift can be used with the ASV. You will need to set it on Vista and then calibrate the machine with the mask disconnected from the hose.

rested gal · Post by **rested gal** » Sat Jun 02, 2007 6:36 pm

DP wrote:The Swift can be used with the ASV. You will need to set it on Vista and then calibrate the machine with the mask disconnected from the hose.

Dunno. The jury may still be out about that.

viewtopic.php?t=11458
Jul 22, 2006 subject: Resmed VPAP Adapt SV - for Central Sleep Apnea
Page 32, in Christine's post:

"Personally, I would not use a Swift with the Adapt, nor any other mask that cannot pass the Learning Circuit on its own."

DP · Post by DP » Sat Jun 02, 2007 7:12 pm

I do have a few patients who are successfuly using the ASV with a swift mask. Thats all I can tell you.

dsm · Post by **dsm** » Sun Jun 03, 2007 1:36 am

Jammin,

RestedGal has it pretty well spot on - the 15 bpm was merely a figure the mfg provided to meet certification but the machine adjusts bpm as needed.

Are you saying that the Adap SV is trying to force your breathing rate ?

Where did you get that 'absolute' 15 bpm info from ? - wherever it was, RG's advice is on the nail.

DSM

christinequilts · Post by **christinequilts** » Wed Jun 13, 2007 7:43 am

DP wrote:I do have a few patients who are successfuly using the ASV with a swift mask. Thats all I can tell you.

How do you define successful? Have you tried it personally to see the Adapt reacts when using a Swift w/Vista serving as a surrogate for Learning Circuit versus the Vista on its own? I've been using an Adapt for over 6 months, after 3 years on BiPAP ST, and if there was any way I could have gotten the Swift to work, I would have- it & the ComfortCurve were my 2 favorite masks for years. I have the added issue that I have Pressure Urticaria/Hives, which is not good when you consider how much pressure more tradition nasal & FFM put on the skin overnight, even when fitted correctly & loosely.

I did experiment with the Swift, when another poster reported her Adapt was acting very differently then mine, and how you would expect one to work. The only way I could replicate what she was describing was with the Swift, when it had a much more difficult time 'reading' what I was doing and basically used the failsafe backup rate of 15 instead of basing it on my own breathing. It allowed me to have more periodic breathing, and more then likely centrals in the brief time I did manage to nap with it on. It was not at all like the Adapt I have grown to love- but more like a machine with a loose screw or two. If my machine ever acted like that with an approved mask, or even a non-approved mask that could pass the Learning Circuit on its own, my DME would have been getting a call from immediately.

An Adapt + Swift may look like its working, as it blowing air & all, and no alarms going off to say something is seriously amiss, but that does not mean its 'successful' by any means. Even comparing machine reported stats with other masks with the Swift showed enough differences to raise Red Flags.

Swift with an Adapt SV

Swift with an Adapt SV

Re: Swift with an Adapt SV