Yes, it is! But in Russia, you know, this procedure is much tougher ))
No sleep sedation, only psrinkling an anelgetic drug into the mouth. And you feel everything, how the hose goes into your stomach with pumping a small amount of gas, It's so hard to keep breathing normally. It lasts about 2-3 minutes, no more, but you feel so bad after that. Huh. I would rather avoid all of these staff, I mean.