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germ filter and pressure increase question
#1
germ filter and pressure increase question
I got another non heated hose for my Airsense 10 so that I could attach a germ filter to the machine rather than have it attached at the mask. It's coming up on pollen season and I want to see if this burlier filter will help with my allergies. anyway, I got a wheezing noise from either my mask or machine with the filter set up on the machine. Placing it back on a heated hose at my mask produced no issues, and hasn't in the nights that Iv'e used it this way. I'll try again just to see.

My sleep report from Resmed (I don't have Oscar) was excellent. I do notice that the flow of air is slightly diminished with this filter on, I believe. Not enough to make me feel like gasping or anything. But I wonder about whether a filter 

--might affect the readings off the machine
--might give me less robust therapy, even tho my report suggested everything was fine. 

I feel good this morning so my sleep seems to have been fine. 

I notice that with the filter attached I ahve to push the start button on the Airsense. It doesn't want to start up automatically in a reasonable time with the filter attached. without the filter it starts within seconds. this makes me wonder about the effect of the filter on the machine's ability to recognize events etc.

signed,
--overthinker
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#2
RE: germ filter and pressure increase question
I see problems if this filter is on the output (patient/mask) side of the CPAP, especially if you're using the humidifier.  The porosity of this type of filter has to be very small, inviting clogging.  This would affect a reliable therapy pressure for one thing.  If you are using the humidifier, the additional moisture would collect on the filter material, thus occluding the pores and further restricting air flow.  You would be much better off is you constructed a prefilter assembly ahead of the intake port.  Creating a cube style filter assembly to allow for enough surface area so as not to restrict intake airflow would be the best option.  One side of the cube would be used to attach it to the CPAP.  This would allow for 5 sides to act an intake filter.
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#3
RE: germ filter and pressure increase question
Merci, Monsieur Nape Rouge. Well, that sort of project is beyond my clumsy talents. By the way I realized that these are called 'bacterial filters'.

These filters are sold widely at Supplier #1 and elsewhere, so I assumed they were kosher. But what you say makes sense. I hope others chime in.

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#4
RE: germ filter and pressure increase question
My husband gets his CPAP and supplies through the VA They supply him with a supposedly better filter:
S9/AIR10 FILTER, HYPO, 50 pack, catalog number 36858. It doesn't look or feel any different than what I get for my Airsense 10. There is a setting for filters in the options--one is AB which we have set on his--I use the regular setting on mine. I don't know if it works any better or not..... It is an authentic ResMed product.
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#5
RE: germ filter and pressure increase question
Well, I am perhaps not the brightest bulb in the christmas tree. The last post made me look in my supply stash and sure enough, there was a package of hypoallergenic filters for the Airsense. the thing is, I've been getting my supplies from Kaiser's in house supplier, and they send me a different type of filter. so now I have the better ones, hopefully, installed before my humidifier tank.

I can'[t help but think the bacteria filter would be better at filtering allergens tho. It is advertised for that purpose.
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#6
RE: germ filter and pressure increase question
The bacterial filters are hydrophobic membrane filters and will have more resistance to flow than other types of filters. Also, because they are hydrophobic they can be completely blocked by moisture. They will definitely stop allergens.
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#7
RE: germ filter and pressure increase question
The filters are at the far end of the machine from the humidifier tank! Good luck in avoiding the bad stuff!
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#8
RE: germ filter and pressure increase question
I contacted my dme. He said that "the bacteria filter should not effect readings but it will lessen pressure and possibly delay response to events. And it will make the machine work a bit harder". All that seems reasonable.

Now I think the best answer is to suck it up and run my somewhat noisy hepa filter all night in my bedroom. That should achieve the same end. Or actually, jsut running it before sleep and shutting down the room should work.

By the way: I got allergy screens for my windows. for fellow sufferers--and fellowettes!--these seem a good idea.
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#9
RE: germ filter and pressure increase question
I had no idea that such a thing existed. Allergy screens for windows.  Huh

Never seen one or even heard of one until now.
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#10
RE: germ filter and pressure increase question
(02-09-2021, 04:33 PM)Big Guy Wrote: I had no idea that such a thing existed. Allergy screens for windows.  Huh

Never seen one or even heard of one until now.

That's nothing. I use an antivirus for my Windows.
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