Help Simple idea, any advice?

[kab]

New and usually a lurker, but wanted to get some input, I liked the idea of a tourniquet style choke so I started testing out the one pictured below. It doesn't completely block the corotid artery but cuts off my windpipe pretty well when I twist it tight. Any suggestions on substances I could use to lower the amount of oxygen I get or anything I could insert between the choke n my neck to squeeze the artery?
Any help is appreciated

 

[closemyeyes]

I'd suggest going the opposite route, leave the windpipe and go for the carotid. From my learnings and experience, windpipe blocking would be extremely discomforting and for a longer duration, which isn't the case with carotid. I've also been planning on a mechanical way - I'll soon make a post about this.