(10-18-2014, 03:52 PM)jcarerra Wrote:
(10-18-2014, 03:33 PM)Peter_C Wrote: The new script (for ASV) reads " 15/3/3 " and I have no idea what that means? Can anyone tell me?
I wish they would quit writing them like that!
It depends on what the machine is as to what the numbers will mean--and how many numbers you need to have.
If by ASV you mean an auto servo ventilator (such as a ResMed S9 Adapt SV), there still are 3 different modes in it
In ASV mode, it runs with a fixed EPAP and variable Pressure Support (PS), which is specified as minPS and maxPS. So, that boils down to three numbers. 15 could be an EPAP level, but the 3/3 makes no sense for min-max PS (especially on an S9 where those have to be at least 5 apart). 3/3 as a PS spec would essentially provide a FIXED IPAP (if the machine would allow it) of EPAP+3 = 18.
Auto ASV mode would require 4 numbers, as EPAP is also allowed to auto-range between a min and max.
So I don't know what 15/3/3 means.
Hi Peter - it is important for you to get a copy of the full ASV Titration report, including all data. It would be helpful to post a copy of the table showing what pressures were tried, for how long, with what result. Of course, remove your true name/address/age/etc on the titration report.
What was the highest amount of PS used during the ASV titration?
The way the doctor wrote your prescription, I also think this would mean EPAP=15, Min PS=3, Max PS=3. This would make it impossible for an S9 VPAP Adapt to be used, because on the S9 VPAP Adapt the min PS and max PS must be at least 5 apart, as jcarerra wrote.
A Philips Respironics System One BiPAP autoSV Advanced could be used, because Min PS and Max PS can be the same on the PRS1 ASV machine. But a new humidifier and heated hose would also be needed, since the humidifier from your S9 AutoSet could not be used.
On your S8 VPAP Auto 25 machine you seemed to be doing okay for years with a PS of 6 to 8, right? So, I think you need to understand why your doc now wants to limit Max PS to only 3. There is no way a Max PS of 3 will be adequate if you are in the middle of a central. Is your doc concerned about the condition of your lungs not being able to use PS higher than 3?
I suggest you ask your doctor to consider prescribing EPAP=11 to 15, PS= 3 to 8, which would allow use of an S9 VPAP Adapt with reuse of your present humidifier.
I think you doctor has made a mistake, since a Max PS of 3 will not be adequate to adequately ventilate you during a central. During a central, a person with normal healthy lungs may need the machine to be allowed to adjust PS as high as 8 or 10 to keep him adequately ventilated.
But if the ASV titration used only 15/3/3, your doctor may need to initially prescribe whatever was used in the titration, planning to adjust it as needed once you actually receive the machine.