S
suffering_mo_7
Specialist
- May 8, 2024
- 318
Ah I see....I was wondering how it would be possible to close all those gaps with the exit bag, with the tubes sticking out the bottom.... wouldn't seem very air tight. Your theory makes sense.
@Tears in Rain and anyone else.....How are these inner pieces of the hoods held on tight onto the face to keep any oxygen out and give a good "seal" like what is needed for nitrogen?Are you looking at a hood from one of the Chinese websites, like in Vizzy's EEBD hood guide? He ctb'd with those yellow EEBD hoods.
View attachment 131301
Are you worried about the nitrogen/inert gas escaping out the fabric?
Both the inner mask and hood itself will be full of nitrogen. Any oxygen initially in the hood will be pushed out by the nitrogen.
Once you pass out, the inner mask will still be snugly against your mouth.
See pics of hood inner masks:
Chinese Alibaba hood:
View attachment 131306View attachment 131305
Draeger CF:
View attachment 131307View attachment 131308
Scott ELSA:
View attachment 131309
the draeger cf has elastic inside, it forces mask to the face, you can see it on the photo, don't know about other hoods, i have this one. and anyway it can't be tight because there are holes in the mask to let the nitrogen flow into the hood, and i guess some exhaled air can go there too, don't know how significant it is@Tears in Rain and anyone else.....How are these inner pieces of the hoods held on tight onto the face to keep any oxygen out and give a good "seal" like what is needed for nitrogen?
only without nitrogen, just put it on@limeoctave Have you tested yours out yet?
as i remember @outrider567 made some tests with hood@limeoctave Have you tested yours out yet?
@kudaphillips What kind of mask did you have for SCUBA? So was that like $600 down the drain?Ya I dunno. It prob would work but exit bag still is the winner for me . I have. Scuba setup that should be complete today, but I doubt I'll even use it because I get drenched with sweat during the process ( not sure if it's an anxiety si sweat or involuntary nervous system reaction to low oxygen ) and whenever I've worn masks sweat makes the mask slide off /really effects the air tight seal .
Anyone know why the 3M Elsa hood didn't work for this guy? Doesn't look like he's around anymore.I finally found an US-based EEBD hood seller. Should be coming in within two weeks. In the meantime, did some more practice runs to continue to get comfortable with the whole process. On my last practice run I decided to go for a real trial. I set the flow at 30 LPM, had the 3M hood on my forehead filling with gas, hyperventilated for a minute or so, took a final big exhale, and inserted my whole face in the hood.
I didn't have any issues breathing, no pain or discomfort again, but this time I actually got lightheaded (like I was getting high) and felt tingles. The blood oxygen levels were dropping slower than usual, but I didn't hyperventilate/suffocate/panic this time around. I guess increasing the flow rate and emptying my lungs help purge the CO2 better so I didn't experience that panic.
I'm still choosing to use the EEBD hood over the 3M when it gets here since the EEBD hood is a full mask that wraps around the neck instead of the 3M which only wraps around the face, and the EEBD has the exhalation valve to my CO2 purging a simpler process. At least I know the 3M hood may not be a bad backup.
Oh, and I tested out the sandblasting hood as a possible alternative since it does have an air intake and exhalation valve. It was not viable. Would not recommend.
The tank is already finished anyway, I generally advise against taking one of those helium tanks to inflate balloons, however I don't think I'll use the method in this topic because I live with my family and I can't attract suspicion, as I was saying, I already took a risk with the tank for balloons, I'll end up with brutal hypercapnia, which is not that brutal because I read that once a certain limit is exceeded the feeling of panic vanishes and the CO2 begins to have a narcotic effect.I asked the AI out of curiosity and it told me that even the least expensive cylinders, namely the disposable ones for parties, still have a helium percentage between 80 and 90, I thought even less to be honest.
can you describe in more detail how it should work?I wonder if a high flow nasal cannula with a mouth guard (that is made to circumvent mouth breathing) would work with a hood?
The high flow cannula is made for up to 60 lpm. A regular nasal cannula can do 4-6 lpm.
Normal breathing is about 0.5L per breath at a rate of 12-20 times per minute, which is about 6-10 lpm.
View attachment 142377
I wonder if a high flow nasal cannula with a mouth guard (that is made to circumvent mouth breathing) would work with a hood?
The high flow cannula is made for up to 60 lpm. A regular nasal cannula can do 4-6 lpm.
Normal breathing is about 0.5L per breath at a rate of 12-20 times per minute, which is about 6-10 lpm.
View attachment 142377
Yes, with a exit bag setup I suppose. Just trying to be efficient with the gas usage and point of discharge.
With the cannula it could be delivered straight to the point of intake.
There are high flow nasal cannula that can deliver up to 60 lpm. Then the idea is to limit the ability to mouth breath with a mouth guard device that would inhibit that from happening...rebreathing CO2. (They are used for people who tend to sleep and breath thru their mouths.)
The mouth device may be a non-issue, since exhaust breath would also have inert gas as well.
Just thinking about ideas for those that plan on an exit bag or hood with constant flow system.
I think though the limiting factor is the regulator for the gas flow. The flow meters on them tend to top out at about 60 scfh which is about 30 l/m.
I guess the other limiting factor is the size of the inert gas tank. It has to be big enough to deliver 20-30 l/m for 15-20 minutes.
I agree, the mouth device is more than likely a non-issue and not worth the effort.Interesting idea, since nitrogen is roughly the same density as ordinary air it makes sense to direct the nitrogen into the respiratory system more efficiently. I would recommend a dual setup, one with the cannula and one ordinary for the bag. I'm worried with only using the cannula the bag will stick into your face because of vacuum and I'm not convinced that the elastic with a hose will sufficiently stop air entering the bag.
I'm not sure about the mount piece, you have to exhale so limiting to nasal exhale could be problematic if you simultaneously push nitrogen into it. I believe you would still breathing co2 for a while since it's stored in the blood, it would take longer than 1-2 to replace all the co2 in the system.
I recommend around 1000 liters anyway so you have enough to practice, even at 30/lpm is enough for 30 mins.
I'm glad you trying to come up with alternatives, the inert method hasn't really changed much since Eebd hood and I believe there are still alternatives to explore. Mask setups (not scba scuba) has been frowned upon and I'm trying to change that opinion.
Well I'm not using a Eebd hood, Im using a gas mask modified to breath from a reservoir connected to nitrogen.I agree, the mouth device is more than likely a non-issue and not worth the effort.
A constant flow system seems to be straight forward and the less complex than a scba setup.
(My personal system setup is scba, the exact same like gas monkey describes in their thread.)
Do you happen to have photos of the EEBD hood system you are talking about? Any data on flow, volume. etc. Its good to know any technical data.
For instance, before this forum, I didnt know the recommended flow for inert gas was 15 l/m. Now, it seems 30 l/m is a good flow to use.
Yes, just trying to come up with ideas. Some people have asked about regulators, tanks, etc....how to obtain, if certain ones will work, etc.
I hope to put together a visual guide that shows all this rather than just text descriptions for both the scba & hood system.
I thought most nitrogen was offered at least to 99%.For those in the US, I called a couple of places about the nitrogen. I can rent the tank, which is good because I don't plan to stick around. However, I'm getting the run around when I ask for the info on the purest nitrogen they have. For the nationwide company that begins with Air, they said they have different types. That the best is "Industrial" grade. However, when I asked about the purity, the guy said he's asked before and no one has ever been able to answer that question.
The other smaller company also wouldn't tell me. They just said, tell me what you need it for and I can tell you what kind to get. Ugh.
Anyone in the US know what "Grade" to get from the Air___ Company?
I'll have to read the thread about your system.Well I'm not using a Eebd hood, Im using a gas mask modified to breath from a reservoir connected to nitrogen.
Gas mask with reservoir, inert gas
I'm looking for advice for a variation of the inert gas method but using a military grade gas mask which is connected to a nitrogen filled environment instead. I haven’t seen this variation of inert gas proposed so I figured it was worthy its own thread I propose using this gas mask...sanctioned-suicide.net
I've never actually held an eebd hood, I don't think they're completely airtight since most can use it with 25-30/lpm. My system is completely airtight and I struggle if the flow is too low.
The inert method has become more expensive since the absence of accessible helium which made this method good and affordable. More alternatives using nitrogen should be available since I've read some having difficulties with exit bag and nitrogen.
So searching online, I found purity info for 95% and above. I found out you can rent the tanks for .70 a day or like $125/yr.I thought most nitrogen was offered at least to 99%.
Grades include, Industrial, Food Grade, Medical, Ultra High Purity, etc, etc.
My thoughts are that they are all typically around 99% and the grades are about impurities and if they have been tested to industry standards. So an Food Grade might be the same as the Industrial, but its been tested officially by some standard testing.
Also it seems that nitrogen classifications include N2.0, N3.0, N4.0, N5.0, N6.0, and N7.0. And these grades get into how pure it goes beyond 99%. (number of 9's beyond)
(I might be off about all this)
I guess one can always tell the retail that you are using it for ....electronic/computer testing systems etc...something they wouldnt know anything about.
That you just need at least 99% purity and that it doesnt matter what grade it happens to be. Its in their benefit to sell you the more expensive gas anyway.
If you contact them again, let us know what you find out.
I'll have to read the thread about your system.
What problems have you had with an exit bag & nitrogen?
This is a SCBA mask used with a Lung demand valve (LDV). It goes into the big holed opening at the mouth part of the mask.View attachment 142405
So I'm trying to see if I can find a smaller mask because the companies don't carry them in stock. This one, I found on E site. It is an SCBA...I'm wondering if it would work but it looks like there are air holes. Is this an issue? I don't know much about these masks. I will cross post on the SCBA page.
Yes, it would be the same manufacturer as the regulator. I wonder why it's only half the price of the other masks. I guess I would need to just research and make sure it's compatible.This is a SCBA mask used with a Lung demand valve (LDV). It goes into the big holed opening at the mouth part of the mask.
The LVD is attached by a hose to the scba regulator, which in turn is connected to the tank.
(I dont have all my photos with me, that show the various parts. See the post by Gas Monkey)
All these parts can be obtained at various places, including where you found this mask.
I think its good to keep the same manufacturer for all the parts to work together properly.
Im not sure if different manufacturers can be used interchangeably.
Not sure why one mask would be cheaper than another. Seems they would all be similar in price.Yes, it would be the same manufacturer as the regulator. I wonder why it's only half the price of the other masks. I guess I would need to just research and make sure it's compatible
The companies I talked to said by law they can't sell Nitrogen below 99.0%, which is a perfectly acceptable Nitrogen percentage to CTB withFor those in the US, I called a couple of places about the nitrogen. I can rent the tank, which is good because I don't plan to stick around. However, I'm getting the run around when I ask for the info on the purest nitrogen they have. For the nationwide company that begins with Air, they said they have different types. That the best is "Industrial" grade. However, when I asked about the purity, the guy said he's asked before and no one has ever been able to answer that question.
The other smaller company also wouldn't tell me. They just said, tell me what you need it for and I can tell you what kind to get. Ugh.
Anyone in the US know what "Grade" to get from the Air___ Company?
I think the options for the masks, are with the front port. Some are more for European areas.Thanks. That's helpful.bI don't know regarding the mask. I wanted to ask rigbone because he chose the more expensive one....
The cheaper one is
1)Dräger FPS® 7000 RA-EPDM-S1-PC-EPDM(this one has a fan looking piece in the mouth piece area) - almost half the price
Versus
2)Dräger FPS 7000 P EPDM Mask - PN (this one does not) I am inserting photos of both.
#1
View attachment 142431
#2
View attachment 142429I
Unfortunately, there is a lot of variation in that industry & products. Not only with the different types, but it seems they change every so often due to the standards they have to go by change. The gov't is strict about standards & they revise them sometimes. The manufacturers have to abide by them.@devils~advocate Very, very helpful!! This makes a lot of sense.