Hopefully the title’s not too confusing - what I mean is, what’s the maximum amount of body mass an otherwise healthy human (female or male) can have surgically removed at once and still remain alive and concious after the event? Don’t worry, don’t need answers fast on this one.
For instance, you don’t need your arms and legs, so amputate those. You can survive on one kidney, one lung and with some of your liver removed, so those could be removed. Appendix can be removed, as can tonsils. External ears, the nose aren’t needed for survival, slice those off. You can remove adrenal glands, so goodbye to those. For chaps, well, you know.
Wiki has a list of -ectomies, what surgeons can slice out of you, but I don’t know how many of those would be survivable all at once and how many are mutually exclusive. Whatdya reckon?