They said his initial psg (just him, no machine) had 75 central apneas. Lead tech feels doc #2 is wrong.
His FP wants him to see another sleep doc (#3) that he knows.
I also have gotten another sleep doc (#4) name from a diff physician. Should we go for yet ANOTHER opinion?
Casiesea
I just finished reading this entire thread and feel that I need to weigh in.
I am not a medical professional but have been on the Assist SV since June 2006 and have considerable experience with it.
a) Unlike A CPAP or BiPaP, one should not "try" different pressure levels.
SWS is right and Banned is really steering you in a bad direction. This is your husband's health here - not selecting which cable channel is best for this evenings entertainment.
b) The ASV algorithm is not always the full answer for everyone. After all,
although I think it is one great piece of engineering, it was initially designed for the heart failure / Cheyene Stokes variant of Sleep Apnea.
c) The amount of experience a given sleep doctor has with the ASV and the amount of experience a DME has is very important. A good sleep MD who
does considerable testing with ResMed products in a medium sized city might only have 20 patients using this device. Other MD's might be less.
d) Asking the lab for the raw test data files (graphs often displayed with test lab software called Sandman or other formats) are invaluable for someone like SAG - who does manage a sleep lab and does a very good job interpreting such data, is helpful above and beyond the written report.
Demand it.
e) MOST IMPORTANT - there are a few labs around the USA with extensive experience in unique sleep cases. I think you should try one of them for the next test. I selected Beth Israel Deaconess Hospital in Boston, the teaching hospital of Harvard University. There are certainly others - Mayo Clinic and perhaps SAG can weigh in with a few other suggestions.
Let me tell you my story, before I suggest what worked for me: I live at moderate altitude, which tends to impact centrals (e.g. I would probably do better at sea level). After trying CPAP, with supplemental oxygen at night, they switched to BiPaP with supplemental oxygen. It never quite seemed to solve all the problems and I still felt tired. My sleep architecture needed meds to get a reasonable night's sleep. Local MD said, perhaps you need to wait on the technology to catch up and get through approvals with the FDA.
So I was the first ASV patient in my state. The test wasn't that conclusive.
Yet I liked the machine's approach and asked to keep it for a few months.
The factory people who came to help with the test, trained some of the local DME and hospital personnel. They said EEP=6 was a recommended starting point and for some people it helped. Others ResMed was suggesting were helped EEP=8. Some people were not helped at all by the algorithm.
The specialists at BI use a technique called CO2 rebreathing or deadspace.
They feel the original ASV machine algorithm needs some help with some type of cases - for me, deadspace tubing and an in line valve, a Non Vented mask, EEP=6 and external Oxygen at night are all needed.
The doctor conducted test ran out of time to optimize settings of amount of deadspace and other variables with me supline, so they recommended I sleep on my side.
The point of all this is your husband has something going on. It's not the run of the mill obstructive sleep apnea, which almost seems like the latest boutique disease which people are putting labs in doctor's offices, each branch hospital, empty hotel or nursing homes etc.
Some people know nothing about the ASV or the Respironics unit. So chose caregivers wisely.
f) Lastly, several masks work well with the ASV. The Quattro is NOT the only one that works. Key is keep the leak rate below 24 L/M. The ASV algorithm doesn't cope well with high leak rates.
g) Getting a ResLink module is a good idea. It contains a smart card that keeps about a month of data which is read by the ResScan software, which
Resmed (stupidly if you want my opinion) refuses to sell to individuals. DSM is right in that a pulse oxymeter may be connected to the module and its data recorded by ResLink and plotted in ResScan. Only one type of pulse ox unit works with the ResLink and it is expensive. The ResLink module used to be available alone without the pulse ox, and if it still can be purchased that way, it is not excessively expensive - even if one's insurance doesn't cover it.
h) Reading the parameters from the original ASV is a bit tricky. It's not as easy as AHI and other indices. You simply want to avoid lots of wide variation activity with the Minute Vent. The new enhanced may be more helpful as it sports a few new features. However, none of us here know anyone who actually has one. Stay tuned, I asked my DME, one of the better ones out there I might add, to call the factory and ask about its availability.
Bottom line:
Get your test raw data and written reports.
Get someone else to review them.
If the local MD's won't help you, go to one of the main sleep research locations where they see many more complex cases than the average sleep MD. After all it's not really as easy as setting in number and then trying more when that doesn't work. You need the benefit of the instrumented data from the PSG study to really understand what is going on.
Don't be afraid to add external oxygen at night. That doesn't mean your husband needs to drag around an oxygen tank during the day.
Keep asking questions and don't assume all threads are created equal on this or any board.
Lubman