I'm sorry to hear this about your brother.
Charcot foot is a really bad problem to have
and depending on how advanced it is it is possible that he may need an amputation, but they will do everything they can to avoid that.
THIS LINK HERE is written for doctors, but parts of it are very helpful
as you can see, treatment depends on proper diagnosis. this will require xrays and CT scans, and likely casting will be tried. it will take some time for your brother to show progress in treatment, and no decision about surgery will be made until all other avenues have been explored.
more concerning is his creatinine level of 4.
if this does not improve in the hospital and he requires dialysis on a permenent basis this will be disabling to some degree.
much of his hospital stay, no doubt, will be concerned with figuring out the extent to which his kidneys are irreversibly damaged.
THIS LINK HER IS FROM THE MAYO CLINIC AND IS WRITTEN FOR PATIENTS AND FAMILY MEMBERS
There is a possibility that his kidney function may improve with proper hydration, and we can certainly hope for that. But it will take some days to figure this out.
I do not see you in the chat.
I am going to switch to Q and A for ease of use.
If you are satisfied with my answer positive feedback is appreciated.
If you have further questions please simply ask them below and click 'reply'.
Good luck to you and your brother in this difficult situation.