What does "backup rate" mean in polysomnograph report?

The sleep doc wrote such in polysomnograph report: "The patient seemed to be best at CPAP/BiPAP pressure of 18 inspiration/14 expiration, with a backup rate of 12 .... If BiPAP ineffective, adaptive servo-ventilation is also an option for treatment of complex sleep apnea"

My question is:
What does "backup rate of 12" mean?

What is "adaptive servo-ventilation"?

thank you.

I think that the backup rate is the number of timed breaths per minute the machine will automatically trigger if it determines that you are not breathing on your own.

A backup rate of 12 means the machine is set up to make sure you breath at least 12 times an hour. If your breathing rate is slower, it will cycle inhale / exhale pressure for you at that rate.

Adaptive servo ventilation is another -- newer - solution for cases when people stop breathing for too long. It is supplied by ResMed's ASV or Resporinics' Bipap SV. I don't know the technical details well enough to explain them.

I gather, from the doctor's recommendation that you quoted, that you were observed to stop breathing even when your airway was not obstructed. Those breathing stop (apneas) that are not of obstructive origin are called "central apneas" because they are caused by the lack of intruction to breathe from the central nervous system. Obstructive apneas (OA) are caused by collapse of the tissue in you upper airway.

Welcome the forum.
O.

ozij wrote:A backup rate of 12 means the machine is set up to make sure you breath at least 12 times an hour. If your breathing rate is slower, it will cycle inhale / exhale pressure for you at that rate.

Adaptive servo ventilation is another -- newer - solution for cases when people stop breathing for too long. It is supplied by ResMed's ASV or Resporinics' Bipap SV. I don't know the technical details well enough to explain them.

I gather, from the doctor's recommendation that you quoted, that you were observed to stop breathing even when your airway was not obstructed. Those breathing stop (apneas) that are not of obstructive origin are called "central apneas" because they are caused by the lack of intruction to breathe from the central nervous system. Obstructive apneas (OA) are caused by collapse of the tissue in you upper airway.

Welcome the forum.
O.

Is that what you MEANT to say?


Den

Wulfman wrote:

ozij wrote:A backup rate of 12 means the machine is set up to make sure you breath at least 12 times an hour. If your breathing rate is slower, it will cycle inhale / exhale pressure for you at that rate.

Adaptive servo ventilation is another -- newer - solution for cases when people stop breathing for too long. It is supplied by ResMed's ASV or Resporinics' Bipap SV. I don't know the technical details well enough to explain them.

I gather, from the doctor's recommendation that you quoted, that you were observed to stop breathing even when your airway was not obstructed. Those breathing stop (apneas) that are not of obstructive origin are called "central apneas" because they are caused by the lack of intruction to breathe from the central nervous system. Obstructive apneas (OA) are caused by collapse of the tissue in you upper airway.

Welcome the forum.
O.

Is that what you MEANT to say?

Den

Maybe Ozij thinks Jinroh is already dead and doesn't need much in the way of breath support

I think I am headed for, in the long-term into BiPAP land as well, and have been studying the various BiPAPS, especially the ASV's. They have adjustments for everything (well, almost everything).

Timba --

You put your words into Den's mouth.

Timba, I'm currently doing a two-week BiPAP trial because I'm "not doing well on CPAP/APAP," and I'm curious about more specific reasons for moving to BiPAP. I understand high pressure requirements and inability to breathe against constant pressure, but are there other reasons? That is, aside from central/complex apnea requiring backup rates, etc. Just trying to educate myself a bit more....

Wulfman wrote:

ozij wrote:A backup rate of 12 means the machine is set up to make sure you breath at least 12 times an hour. If your breathing rate is slower, it will cycle inhale / exhale pressure for you at that rate.

Adaptive servo ventilation is another -- newer - solution for cases when people stop breathing for too long. It is supplied by ResMed's ASV or Resporinics' Bipap SV. I don't know the technical details well enough to explain them.

I gather, from the doctor's recommendation that you quoted, that you were observed to stop breathing even when your airway was not obstructed. Those breathing stop (apneas) that are not of obstructive origin are called "central apneas" because they are caused by the lack of intruction to breathe from the central nervous system. Obstructive apneas (OA) are caused by collapse of the tissue in you upper airway.

Welcome the forum.
O.

Is that what you MEANT to say?


Den

Actually, that would be fine as long as the breaths were 12.27 gallons each.

Muffy

OK, OK, you all know what I meant.

12 times a minute.

And I also meant "Welcome to the forum"


Glad you caught the mistake, Den!

Muffy would an elephant's lungs suffice? How much is that in litres anyway? (Hmmm, how does this sound as an excuse for my blooper: I'm only good in decimals, we don't do time in inches where I live... You guys not buying that?... sigh... neither do I...oh well).

O.

twokatmew wrote:Timba, I'm currently doing a two-week BiPAP trial because I'm "not doing well on CPAP/APAP," and I'm curious about more specific reasons for moving to BiPAP. I understand high pressure requirements and inability to breathe against constant pressure, but are there other reasons? That is, aside from central/complex apnea requiring backup rates, etc. Just trying to educate myself a bit more....

Twokatmew, like you, I am having a challenging time on CPAP/APAP. Although I am now finally beginning to see improvement, it is slight enough that I have to see it in a long-term average. I am currently experimenting with APA pressures of 12 to 16. Although I have seen the best score ever at this pressure (2.5), I have also seen >11. My doctor told me I wopuld be 'hard to titrate' and she wasn't kidding! Incidentally, that low pressure was at the end of what was an incredibly frustrating day. I was totally exhausted from fighting against problems that just shouldn't have been.

In addition to a very variable therapy result, I am seeing a few what I believe to be centrals in my data. There is a certain low rate of centrals that seem to accompany especially APAP therapy, but I am not sure what an acceptable rate is. So I will be going over that carefully with my doctor in a couple of weeks.

In the end, a complex BiPAP that can significantly adapt to my changing therapy needs may be the best answer. The current unit will be a backup or travel machine. Only time will tell.

The subject of BiPAPs and servo ventilation is a very complex one, and one that I do not yet understand well enough to give any kind of advice. There is a gentleman on here with the handle SWS who is extremely knowledgable about advanced pressure therapy. His posts tend to be long and rather technical. But, boy can you learn a lot from them!

ozij wrote: we don't do time in inches where I live... You guys not buying that?... sigh... neither do I...oh well).

O.

how many light years is one inch? or would you prefer to use light nanoseconds?




....

Google says that 1 inch = 2.68483946 × 10 -18 light-years. That's ten to the -18th power.

So 1 inch = 0.00000000000000000268483946 light-years

Aren't you glad you asked?

just many ppl think light years is a measure of time not distance - I was trying to help Ozij out.

actually an inch is close to 1/12 of the light nanosecond - again a distance not a time measurement

jules wrote:

ozij wrote: we don't do time in inches where I live... You guys not buying that?... sigh... neither do I...oh well).

O.

how many light years is one inch? or would you prefer to use light nanoseconds?




....

Thanks, for the reminder Prof. Though actually, I don't do that in inches either though .... we're decimal all the way through.

well one member of this household is metric all the way but it isn't me - I can convert easily enough but I still use inches, feet, ounces, teaspoons etc. most of the time