O2 concentrator to use with CPAP

Hello

2 weeks ago started to use supplemental oxygen at night, 2 liters as prescribed. Oxygen concentrator (AirSep, model VisionAire 5) tube connects to CPAP tubing. SPO2 improves to 97-98 percent with mask on, but drops back to my usual 91-92 percent when mask removed. Sleep and daytime energy a bit better.
2 issues so far are
a) noise from concentrator, it is much louder than CPAP humming - it seems have to get used to it
and
b) concentrator is bulky, awkward to take on holiday trips.

Thinking about buying portable concentrator - so far found Imogen (around 3-4 grand), Philips about half cheaper. Any experience with those? Is Imogen worth paying double? Any other good reliable brands?
Thanks

I have a Inagen for home. It weighs about 18 lbs.,is very quiet and travels well in my RV. I have a 50' O2 tubing and I set the machine outside my bedroom.

The tubing allows you to put the concentrator as far away as you need.
(Within reason, of course)

vps wrote: ↑

Sun Jun 25, 2023 10:48 am

Any other good reliable brands?

I asked a friend who studied this in detail and also got some professional help before buying. He said Imogen is top of the line. But, he found another company who is cheaper and makes machines that use Imogen parts. He even suspects the machines may be made by Imogen and marketed at lower prices. He is very happy with his purchase - https://oxygo.life/oxygo-next
OxyGoNEXT

another company who is cheaper and makes machines that use Imogen parts

Thanks for advice! Had a look at this concentrator, it's good, but delivers pulse flow, my understanding for use with CPAP flow should be continuous. Is this correct?

vps wrote: ↑

Mon Jun 26, 2023 11:05 am

another company who is cheaper and makes machines that use Imogen parts

Thanks for advice! Had a look at this concentrator, it's good, but delivers pulse flow, my understanding for use with CPAP flow should be continuous. Is this correct?

It is my understanding as well.

Pulse flow would be fine for daytime/awake use but for use with cpap everything I have ever seen points to added O2 needed to be continuous.

vps wrote: ↑

Mon Jun 26, 2023 11:05 am

another company who is cheaper and makes machines that use Imogen parts

Thanks for advice! Had a look at this concentrator, it's good, but delivers pulse flow, my understanding for use with CPAP flow should be continuous. Is this correct?

Correct, that concentrator would not work with CPAP.