Method Exit Bag co2 buildup

[Parasitism]

I've been searching through inert gas/exit bag threads and I can't find a definitive answer to some questions that I have.

If I'm using nitrogen and a plastic bag, how loose does the drawstring that seals the bag around my neck need to be?

I understand that if the Co2 build-up from exhaling builds up too much then it can induce a panic response and wake me up. Do I have the drawstring loose enough so that the bag is not fully touching my neck?

Thanks

 

[SomewhereAlongThe]

I've read that 2 fingers should fit perpendicular to your neck. That it should be snug and not tight.

What I've done is focused on all the aspects involved, like how there's going to be a gap where the tubing is, and when the exit bag crinkles if you put it up snugly against your skin on your hand for example, you can see there are some gaps there because of the crinkles. So I factor this in when tightening the cord on my exit bag. I tighten it so that 2 fingers against my neck can fit underneath the drawstring, and then I like to get a feel of the drawstring, is it tight against my fingers? I even move my fingers along the hem of my exit bag and judge rather it's too loose or too tight. If it's not touching your neck, then gas will escape very quickly, it should be snug against your neck.

 

[DeusVult]

You're supposed to be pumping in quite a lot of gas, it should be constantly flushing away any CO2 and Oxygen, and the bag will naturally expand like a balloon. You should use an elastic cord to tie the bag, and it will expand itself as needed by the flow of gas. Depending on how you sown it, you should be able to adjust the length easily at any time, and play around with it.

 

[Intoxicated]

I understand that if the Co2 build-up from exhaling builds up too much then it can induce a panic response and wake me up.

I've never seen any study which would support the theory that CO2 can make you awake after loss of consciousness occured due to insufficient blood oxygen saturation. Some literature on suicides with plastic bags mentions quite the opposite point of view - that excess of carbon dioxide can contribute to inducing LOC.

I can imagine that a possible negative impact of CO2 on CTB via ventilated exit bag might be related to the ability of this gas to stimulate respiration, particularly to the point when the flow rate of the inert gas coming from the tube into the bag becomes too low compared to the demands of increased respiration, so a large amount of air could be captured from the ambient atmosphere. This scenario looks more realistic for me than bringing consciousness as a direct effect of CO2 on the brain.

 

[locked*n*loaded]

This is why some people first test their bag using O2 instead of going right to N2 - to make sure the elastic is set to the correct tension around the neck to allow the escape of CO2.