"Dead Space" Equipment

Guest - Boston · Post by **Guest - Boston** » Fri Aug 25, 2006 1:29 pm

I was prescribed a “dead space” mask and vent several weeks ago and have been working on a couple of issues:

1. Since the mask is non-vented I have been getting major rain-out in the mask and dead space hose. If I am in a completely dry environment this is not a problem, but on damp days (no humidification used) it is a problem. Heated hoses, etc. are not applicable. Has anyone with a dead space configuration managed to remedy this?

2. The DME provided a Resprionics vent. This sucker is noisy! This is s different vent then was used during titration (which I cannot identify). Does anyone know an alternative vent that might be a bit quieter.?

Many Thanks,

Boston Guest.

Snoredog · Post by **Snoredog** » Fri Aug 25, 2006 2:16 pm

have you been diagnosed with CSDB (complex sleep disordered breathing)? that is the only patients I know of suggesting that type of mask, so it retains more CO2.

do you know what brand and type the mask is you got?
e.g. Is it made by Respironics or someone else?

What type of machine did they give you?

Guest - Boston · Post by **Guest - Boston** » Fri Aug 25, 2006 3:06 pm

Yes - CSDB. CPAP just did not resolve all my breathing issues.

Yes - Respironics Full Face sans vent.

Machine is CPAP - Remstar Pro II running at 12 cm. Also O2 as an option to ease sleep transitions.

- Boston Guest

Snoredog · Post by **Snoredog** » Fri Aug 25, 2006 3:16 pm

you might want to visit and read this thread:

viewtopic.php?t=11458

It is all about CSDB and a ASV machine to address it.

Guest - Boston · Post by **Guest - Boston** » Fri Aug 25, 2006 4:21 pm

I am familiar with the thread -- thank you. The reference equipment was one of the options considered during titration. A very sophisticated device.

-Boston Guest

Guest · Post by **Guest** » Fri Aug 25, 2006 5:09 pm

Guest - Boston wrote:Heated hoses, etc. are not applicable.

Why can't you try a heated hose?

Guest - Boston · Post by **Guest - Boston** » Fri Aug 25, 2006 5:59 pm

Thanks - I have a heated hose. Works great with straight CPAP.

The condensation is in the mask and the "dead space" -- which is downstream from the vent and the heated hose. Dead space is all about re-breathing C02 and with that comes excess moisture - hence the issue.

-Guest Boston

frequenseeker · Post by **frequenseeker** » Sat Aug 26, 2006 9:50 pm

Hi Guest-Boston,
I have deadspace equipment too, same vent - yes terribly noisy, I am not happy about that!
I have had important relief with it though, and, as you probably know from reading the other topics, I am waiting for my ASV titration to be analyzed and hope to get that machine next.
I am using a Swift for mask and the Aussie heated hose and have no rainout problem now that I lowered the setting a bit on my integrated Resmed humidifier. I have a VPAP III that I am running as cpap.

Do you have to use the FF? If you are having mouth leak problems, my DIY mouth leak appliance could help. Let me know if you need more info on that. I used to be a champion mouthleaker, and FF gave me panic apnea wakeups for some reason (pre deadspace) but no problem now with the oral appliance plus Swift.

I would think the nonvented would give a FF more condensation than a pillows type, makes sense, just from your own respiration humidity, let alone added H2O.

You can PM me if you'd like to continue to explore deadspace challenges..

Tucker · Post by **Tucker** » Sun Aug 27, 2006 7:27 am

Many thanks for the response. I have been following your posts for months and have very much appreciated your observations.

I am a world class mouth breather unfortunately.

Tucker -- Formerly Boston Guest

friendly guest · Post by **friendly guest** » Sun Aug 27, 2006 8:20 am

condensation happens when warm moist air contacts a cooler surface, so have you tried insulating the MASK, I have read of people using adhesive backed fabrics, like moleskin, to cut and past an insulating layer on the exterior of the mask, being sure not to cover any vents, which in your case, should be easy if there aren't any.Or if a creative sewing person is in your life, have then make a little jacket for the mask.

frequenseeker · Post by **frequenseeker** » Sun Aug 27, 2006 8:50 am

Oh how sweet, a little jacket for my widdle mask Just think what neat things I'd be missing if I didn't have OSA
Thanks for the suggestion, though. Ingenuity is constantly required in this pursuit of rest and wellbeing.

Now, interestingly, last night was the coolest temperature night I've had since getting the DS setup a few months ago. And guess what, I woke up with rainout in my nostrils this morning Teaches me to be so smug..yes, an insulated/heated hose still leaves the mask and its tubing uninsulated and unheated. The Swift and the DS valve leaves about 12" bare between nostrils and heated hose. Maybe the Aussie hose producers could make a version that has a sleeve that could be pulled up around there..?

Here is the basic topic for mouthleak appliance: http://www.talkaboutsleep.com/message-b ... php?t=4750

You can have a dentist make one or DIY. My dentist is happy to share info with other dentists.

Snoredog · Post by **Snoredog** » Sun Aug 27, 2006 9:15 am

you guys have a picture of this dead space equipment?

is the vent valve an in-line valve?

I would think with a non-vented mask you would have much more condensation in the mask from the exhaled air. I seen that clogging only 2 of the 6 holes on my UMFF.

frequenseeker · Post by **frequenseeker** » Sun Aug 27, 2006 10:13 am

Here you go:

The Swift's vents are blocked with silicone from ear plugs that were bought OTC (drug store etc.)

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CPAPopedia Keywords Contained In This Post (Click For Definition): swift

Snoredog · Post by **Snoredog** » Sun Aug 27, 2006 11:13 am

thanks FrequenSeeker, gives one a better idea on what they are talking about.

"Dead Space" Equipment

"Dead Space" Equipment

Re: "Dead Space" Equipment

insulate mask