Can a human leg or foot be successfully sewn back on . if cut off. and feeling and motion restored ??

Answer:
It depends on several things: the level of amputation, the amount of local injury to the limb, the degree of circulatory compromise to the amputated part.
usually if an amputated foot or hand is sewn on within a couple of hours of the injury (as long as it's been promptly iced), and if there is not too much local crush injury to the basic limb or the amputated part, most normal gross function can return. However, fine motor touch and sensation may be affected as nerves don't really regenerate, and new peripheral neural connections must be made to compensate.
The general rule is, the more distal the amputation is on the limb, the better the outcome. SO reattaching a finger is going to go better than reattaching a whole hand.

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Yes

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Yes but it has to be put on ice and kept chilled untill the doctors can get ahold of it. I have heard of them being attached with no bad effects for up to 2 hrs after the accident, but usually it's 30 mins before permanent damage occurs.

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under the right conditions it can be

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Yes, but the most important item to remove is the nerves. The nerves must be able to be, more or less, connected. If not, your brain will not be able to send signals to a specific body part so that it can move.

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Yes, under the proper conditions this procedure has been successfully completed dozens of times.

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no because it would be infected. blood circulation would not go

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Yes, yes, yes, if everything was done right, the limb picked up and kept on ice for a bit. Microsurgery is not a new idea and is done on a daily basis. And to the person that said no because of infection, that is what all the disinfectants and things are for and antibiotics are a wonderful drug for infections. I think I would be more positive about my answer before I gave it.

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hmm... probably, with technology today...i would guess it depends on how long the leg had been..."cut off". But there would be a high risk for infection.

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