[Equipment] 1st Post: 7 Yr w/Resmed Airsense 10, now not rested 3 nights w/new 11

[HappyAPAPerSince2017]

Hello all. I have been a 100% believer in the powerful benefits to my health since the 1st night I used my Resmed 10 back in 2017. Every morning, I wake up fully refreshed and energized. This APAP of mine has been a life-changer.

After the years of use, my 10 began to become a bit noisy. Also, the 10's round seal where it meets the reservoir has deformed in shape over the year. My SoClean unit finally could no longer seal to initiate an ozone cycle. Thus, I sought and obtained a new APAP - the Resmed 11.

After months of waiting, I finally received and set it up for use this past Sunday night. I am using the same Philips nasal pillows and hosing sizes as I did with the 10 (except they are new). The res tech told me that she set up the new 11 with the same settings as my 10 had.

Now, 3 nights of Airsense 11 use, I am not feeling rested by sleep. I wake up tired. It is a struggle to get of bed now after the 11 as my energy is gone compared to after sleeping with the 10 in use. I am sluggish like I used to be years ago. In fact, I was feeling excellent using the 10 as have been eating better and exercising more to lose 25 pounds in 2024 YTD.

I am an engineer, so have been wondering what might be the difference between these machines. My theory is that the 11 with its 45% smaller motor is not performing the same way that my body requires. Specifically, the amount of air flow at a given pressure might vary (FYI - my engineering specialty is aerodynamics) between the two Resmed models. If a person has larger lung volume, they would need a larger amount air of delivered than a smaller-lunged person over the same time. Right?

I am open to any and all thoughts on this. Tonight, I am going back to my old Resmed 10 to see how I feel on Thursday morning!

THANKS - Rich

[Narcil]

you'll have to post data from oscar if you want help with your therapy. The tech said she set it up the same but i wouldn't take her word for it. do you have a sd card in each machine? look here for info on how to present screenshots but data from both machines would really help to see what changed in your therapy. did you access the clinical menu and compare therapy settings on your devices to make sure they were the same?

while there are differences between the 10 and 11 it is generally understood to deliver the same level of therapy. yes the motor is smaller which means it has to ramp up higher to deliver the same amount of air but that really shouldn't really affect therapy. 

i'm surprised to read people still use their soclean when it's been basically proven to accelerate foam degradation. and it's not even proven to be effective, there's a reason the FDA hasn't approved such a device since the 70s.

[staceyburke]

I would make sure the EPR is set to full time and the same as your old machine. Also make sure it is not on the “soft” setting that the old machine did not have.

[Sleepster]

Specifically, the amount of air flow at a given pressure might vary (FYI - my engineering specialty is aerodynamics) between the two Resmed models. If a person has larger lung volume, they would need a larger amount air of delivered than a smaller-lunged person over the same time. Right?

No. For the treatment of obstructive sleep apnea (OSA) the CPAP machine just keeps the upper airway unobstructed. The volume of air delivered to your lungs is determined by your respiratory effort via your diaphragm. It is far more likely that the problem as others have noted is with the settings being different. As they have mentioned, you need to verify that the settings are the same rather than just take the word of the respiratory technician.

I'm disappointed to learn that the motor in the A11 is smaller. That just means it's likely less robust and will not last as long. A sad state of affairs for what used to be regarded as a premier machine manufacturer. A couple of years ago when my A10 got 5 years old, I replaced it with another A10. Glad that I did.

[Narcil]

I'm disappointed to learn that the motor in the A11 is smaller. That just means it's likely less robust and will not last as long. A sad state of affairs for what used to be regarded as a premier machine manufacturer. A couple of years ago when my A10 got 5 years old, I replaced it with another A10. Glad that I did.

i don't want to hijack his thread but here's an interesting pic : the as11 motor is allegedly the same as the airmini.

[Deborah K.]

Ask your DME to replace the 11 with the 10.

[BoxcarPete]

If you still have the 10 but don't have an SD card for the machine(s), definitely invest in that so that you can use OSCAR to help verify that the machines are performing the same as each other.

Difference in motor size should not cause trouble like this. Either would be up to the task of delivering air at the needed level. Smaller motor should be able to spool up and down more quickly to respond to pressure change needs, which is an advantage if you have EPR or bilevel needs. Only downside would be motor life IF the power demands placed upon it cause heat to build up faster in the smaller motor's lighter gauge windings (again, if applicable. Design details vary). Other than that, life is typically determined by the bearing, which is not necessarily lower performing given a smaller form factor. The A10 has a history of reliability that it will take many years yet to determine whether or not the 11 can match.