From what you post, it sounds to me as though your brother is very rational. He had been in the hospital for 6 weeks and he wants to go home and is not wanting to die in the hospital. He wants to get out of bed. He feels as though he is locked up because he is not allowed out of bed and not allowed to go home. All of that is perfectly sane and reasonable.
A friend of mine died of stomach cancer earlier this month. He felt much the same way. He wanted to come home from the hospital and we moved heaven and earth to make that happen. We had a hospital bed and oxygen equipment delivered to his house and we arranged for a nurse to come daily. He died at home surrounded by family and friends and his beloved cats.