In view of that, it seems premature to sell this service. It's curious that you should choose anaesthesia as your example rather than snake oil. I won't be so unkind as to offer any guesses. That's more than can be said for cryonics. Those who hawked anaesthesia before it was tested received and deserved just as much skepticism and criticism as those who are now pushing cryonics.
Somebody always has to go first.
Now take some off ice and see if you can get them back. Try various methods. That you're not engaged in fraud is no support for what you're promoting. This shopworn argument keeps turning up. I'll give you a crying-towel but won't tolerate any foolishness.