There are far too many possibilities for us to speculate. You'll have to wait for the doctor's diagnosis. I'm sorry this happened. I hope the person gets a good prognosis.
If possible, it is better to transfer him home and take care of him there https://myallamericancare.com/services/home-care-waiver/ This is the same help as in the hospital. Waiver programs, also known as waiver funded services, are programs for individuals that require long-term care but wish to remain in the comfort of their own home. The quality of care received through a waiver program is the same level as one would receive in a hospital or nursing home setting, but allows patients to live as independently as possible and delay or even prevent admission to a medical center.